WO2011153941A1

WO2011153941A1 - Method and radio network controller for performing access according to the order of timeslot priority

Info

Publication number: WO2011153941A1
Application number: PCT/CN2011/075461
Authority: WO
Inventors: 杨哲; 赵敏; 郭俊利; 蔡月民
Original assignee: 电信科学技术研究院
Priority date: 2010-06-11
Filing date: 2011-06-08
Publication date: 2011-12-15
Also published as: CN102281575B; CN102281575A

Abstract

Provided are a method and a Radio Network Controller(RNC) for performing access according to the order of timeslot priority. The method includes: downlink timeslots, with the Transmitted Carrier Power(TCP) interference values which are greater than a threshold, are screened from the timeslot priority queue of the present Slow Dynamic Channel Allocation(SDCA); the access is performed according to the screened timeslot priority queue of the SDCA; transmission rate reduction is implemented on the User Equipment(UE) that fails to access; and if the access is failure again after the transmission rate reduction, the timeslot priority queue is acquired by ordering all timeslots for uplink and downlink based on a timeslot queuing method of the SDCA and then the access is performed. With the present invention, it is avoided that the a carrier is finally ordered in the front as the carrier has a downlink timeslot with the maximum TCP and a downlink timeslot with the minimum TCP, thus the reliability of the access is improved.

Description

Method for accessing by time slot priority ranking and wireless network controller This application claims to be submitted to the Chinese Patent Office on June 11, 2010, the application number is 201010205644.6, and the invention name is

The priority of the Chinese Patent Application for the Method of Accessing by Slot Priority, and the Radio Network Controller, the entire contents of which are incorporated herein by reference. Technical field

The present invention relates to wireless communication technologies, and in particular, to a method for accessing by time slot priority ordering and a radio network controller. Background technique

For the UE (User Equipment) to be accessed in the target cell, the current implementation is traversed according to the carrier priority queue and the slot priority queue, and attempts to access.

Carrier and time slot priority queues are usually calculated in the following three ways:

1), in a fixed order;

2), sorted by power resources:

Uplink: based on the base station RTWP (Received Total Wideband Power), or ISCP (Interfere Signal Code Power); Downstream: Based on the Transmitted Carrier Power;

3), sort by code resource occupation.

For the three schemes, except for the uplink in mode 2), the resource detection is performed for the target cell, and the presence or absence of the user in the neighboring cell and the possible impact are not considered.

In various versions of the 3GPP TD-SCDMA (Time Division Synchronized Code Division Multiple Access) system (eg, R4, R5, R6, etc.), when a new UE allocates new resources in the target cell, It is necessary to consider the actual load conditions of the uplink and downlink to make decisions, for example, considering the BRU (Basic Resource Unit) occupancy or power allocation. Due to the short code characteristics of the TD-SCDMA system and the lack of frequency resources, the current interference is caused. Limited, it is recommended to rely on power distribution or interference measurements. Since this decision is made in the RNC (Radio Network Controller), the uplink interference information is sufficient, and the downlink interference information is difficult. This also leads to inaccurate resource decisions in the final downlink allocation, resulting in new The quality of the UE's service has declined. Summary of the invention

The technical problem to be solved by the present invention is to provide a method for accessing by time slot priority ordering and a radio network controller.

Further, a determination scheme of the slot priority for sorting is also provided.

Further, a determining scheme of a cell for interference coordination is also provided.

An embodiment of the present invention provides a method for accessing by slot priority ordering, including the following steps:

Blocking, in the current SDCA time slot priority queue, a DL time slot with a TCP interference value greater than a threshold; performing access according to the masked SDCA time slot priority list;

Slow down the UE that fails to access;

If the access fails after the speed reduction, all UL time slots and DL time slots are sorted according to the SDCA time slot queuing method to obtain the time slot priority list, and then access is performed.

Further, when determining the priority of the time slot, the method includes:

Acquiring each TCP of each downlink time slot of the interference neighboring cell that performs interference coordination;

The slot priority is determined according to TCP.

Further, when determining each interfering neighbor cell that performs interference coordination, the method includes:

Obtaining a measurement report reported by the UE;

The pilot measurement results of the source cell, the target cell, and other neighboring cells are obtained according to the measurement, and the cell for interference coordination is determined according to the pilot measurement result.

A radio network controller is provided in the embodiment of the present invention, including:

a masking module, configured to block, in the current SDCA time slot priority queue, a DL time slot with a TCP interference value greater than a threshold;

a first access module, configured to perform access according to the masked SDCA time slot priority list; a speed reduction module, configured to slow down a UE that fails to access;

The second access module is configured to: if the access fails after the speed reduction, all the UL time slots and the DL time may further include:

a TCP acquisition module, configured to acquire TCP of each downlink time slot of each interfering neighbor cell that performs interference coordination;

And a priority determining module, configured to determine, according to the TCP, a time slot priority required by the first access module.

Further, the method may further include:

a measurement report module, configured to obtain a measurement report reported by the UE;

a measurement result module, configured to obtain pilot measurement results of the source cell, the target cell, and other neighboring cells according to the measurement report;

The interference cell determining module is configured to determine, according to the pilot measurement result, a cell required for interference coordination required by the TCP acquiring module.

The beneficial effects of the present invention are as follows:

After the TCP interference value is greater than the DL time slot of the threshold, the first round of the sorting is performed: access is performed according to the masked SDCA time slot priority list; then, the failed access UE is decelerated; if the speed reduction continues, the access fails. All the UL time slots and DL time slots are sorted in the second round: After the time slot priority list is obtained according to the SDCA time slot queuing method, access is performed. Since two rounds of sorting access are used, it is possible to prevent a certain carrier from having both the largest DL time slot of TCP and the smallest DL time slot of TCP. Finally, the carrier is still ranked in the front, and the connection is improved. Reliability of the entry.

In the determining scheme of the slot priority provided by the embodiment of the present invention, the UE determines the target cell slot according to the TCP (base station downlink transmit power) of each downlink slot of the neighboring cell participating in the interference coordination. Priority, so that the interference environment of the target cell to be accessed in the time slot can be more accurately reflected, so that the new access user can select the most suitable time slot access.

In the determining scheme of the cell for interference coordination provided by the embodiment of the present invention, The reported measurement report obtains pilot measurement results of the source cell, the target cell, and other neighboring cells; and determines the cell for interference coordination according to the pilot measurement result. Therefore, the range of the interference coordination candidate cell is determined by borrowing the reported neighboring cell, and the neighboring cell with weak interference is removed, thereby avoiding excessive processing and increasing the error. DRAWINGS

FIG. 1 is a schematic diagram of an implementation process of a method for determining access by time slot priority according to an embodiment of the present invention; FIG. 3 is a schematic flowchart of a method for determining a cell for performing interference coordination according to an embodiment of the present invention; Detailed ways

The technical solution provided by the present invention finally solves the problem that the downlink interference information is insufficiently acquired, so that the new UE evaluates the downlink interference more accurately when the target cell allocates resources, thereby reducing interference and improving service quality. Specific embodiments of the present invention will be described below with reference to the accompanying drawings.

In the implementation description, since the resource allocation is performed for the target cell, the current cell in the application refers to the target cell; meanwhile, the variables in the implementation description are all in the actual value of dBm.

First, the scheduling manner of the slot priority will be described, and then the determination of the slot priority will be described. Finally, how to determine the cell for interference coordination will be described.

First, the sorting method of time slot priority.

FIG. 1 is a schematic flowchart of a method for performing access according to slot priority ordering. As shown in the figure, the following steps may be included:

Step 101: Block, in the current SDCA time slot priority queue, a DL time slot with a TCP dry 4 value greater than a threshold;

Step 102: Perform access according to the masked SDCA time slot priority list. Step 103: Slow down the UE that fails to access;

Step 104: If the access fails after the speed reduction, all UL time slots and DL time slots are deleted according to all UL time slots, and the DL time slots are deleted in the process of deleting the DL time slots whose TCP interference value is greater than the threshold. All time slots, including those time slots.

In the implementation, when the carrier/slot is sorted and received for the target cell, the SDCA (Slow Dynamic Channel Allocation) carrier frequency sorting method of the target cell uses the NodeB common measurement and the DL (downlink, downlink) by default. Link) The slot queuing method uses the NodeB common measurement by default, and the UL (Up Link) slot queuing method does not require the method of the cell to be configured. When DL is measured with TCP, you can refer to the following formula.

Pj, the implementation of h. In the implementation, the SDCA is a RRM (Radio Resource Management) algorithm. The adjustment method can be based on different services of fixed queuing, BRU (Basic Resource Unit) resource selection of fixed services, etc. Several queuing modes can also control the uplink and downlink time slots of priority access of each carrier frequency (N frequency point) of each cell. In this embodiment, it is based on SDCA of public measurement.

In order to prevent a carrier from having both the largest DL time slot of TCP and the smallest DL time slot of TCP, the carrier is still integrated in the previous situation. Here are 2 rounds of resources to try:

In the first round, the total interference TCP of the DL time slot is greater than or equal to the threshold (configurable under the cell), and the SDCA carrier/slot queuing method is used to perform sorting to obtain a carrier/time slot priority list. , access. When the carrier is sorted, the total number of DL slots needs to be subtracted from the deleted time slot. If the access fails, you need to try to slow down. If it still fails after the speed reduction, go to the next round.

In the second round, all UL time slots and DL time slots participate in the SDCA carrier/time slot scheduling method described above, and are sorted to obtain a carrier/slot priority list for access.

Further, the carrier priority and the time slot priority may be considered simultaneously according to the number of resources occupied by the service. That is, in the prior art, when the SDCA algorithm is used, the carrier is usually selected first. The time slot can be selected according to the time slot priority, and the carrier priority is obtained by combining the coefficients obtained by combining multiple time slots in the uplink, and the coefficients obtained by combining the multiple time slots are weighted. In the embodiment of the present invention, when the SDCA algorithm is used, the step of the first carrier after the time slot is broken, and the resource may be selected according to the mixed priority of the time slot and the carrier in the priority queue. Specifically:

After obtaining the priority weights of all uplink and downlink time slots, the carrier priority does not use the average weight ordering of all time slots, but selects the uplink/downlink time slot combinations that satisfy the resource requirements from each carrier, and Row weighting gives the priority weight of the combination. For example, if the uplink and downlink requirements of the to-be-switched service are all single-slots, the following table is calculated according to the slot priority factor:

Finally, the priorities of all the calculated candidate resource combinations are sorted, and the best time slot combination is preferentially selected for resource allocation attempts to determine the slot priority of all UL time slots and DL time slots.

Second, the determination of the priority of the time slot.

Next, in step 102, in the process of obtaining the slot priority list according to the SDCA slot queuing method, the implementation of the slot priority is determined.

FIG. 2 is a schematic flowchart of a method for determining a time slot priority, as shown in the following figure, which may include the following steps: Step 201: Acquire TCP of each downlink time slot of each interfering neighboring cell.

Step 202: Determine a time slot priority according to the TCP.

In an implementation, in step 201, the interfering neighboring cell that needs to acquire the TCP may use the cell that performs interference coordination determined in the first scheme, so that the determined cell that performs interference coordination may be used to determine the time slot according to the time slot. The priority of the time slot on which the priority queue traverses and attempts to access. However, for each interfering neighboring cell, other conventional means may be used to determine, but only when the cell that performs interference coordination determined by the foregoing manner is used, the neighboring cell reported by the handover measurement is used, and the UE is switched according to the handover. A better effect can be obtained for the reason that the interference is poor in the reception power of each neighboring cell in the candidate cell.

In the implementation of step 201, TCP (Transmitted Carrier Power) is a common measurement value of the NodeB, and the transmit carrier power of each time slot is measured and reported as a percentage of the maximum transmit power. RSPA can be implemented by a certain processing method. (Radio network Signalling Process Assemble, Wireless Network Signal Processing Board) The TCP in the neighboring area of the board is acquired in the storage area of the neighboring area information of the board. When implemented by a certain processing method, for example, a simple processing method is to use the transmission TCP information in the existing communication mode between different signaling boards in the RNC.

In the implementation of step 202, in the implementation of determining the priority of the time slot according to TCP, the following manner is provided in the embodiment, and the following description is as follows:

method one

In the implementation, after obtaining the TCP measurement value of each downlink time slot of each of the interfering neighboring cells, the correction of the measured value may be considered. Therefore, further, the method may further include:

Handle TCP as follows:

TCP; _ih = TCP _{1 ] h} xW° _σ

J' ^HJ ' ^H , A is the road loss weighted value calculated by PCCPCH information;

When the PCCPCH transmit power of each cell is the same:

a _i = (PCCPCH _ RSCP _t - PCCPCH _ RSCP _t ) _Gossip ' _n Or, when the PCCPCH transmit power of each cell is different:

a. = {PCCPCH _ RSC - PCCPCH _ Power, ) - (PCCPCH _ RSCP _t - PCCPCH _ Power _t ) The subscript represents the current interfering cell, and the t subscript represents the target cell in dB.

j, h respectively represent the hth downlink time slot of the jth carrier of the cell. The path loss weighting coefficient value representing the i-th interfering cell.

PCCPOT — Pm^r represents the transmit power of _pccpCH . Specifically, for each interfering neighboring cell, since the TCP value is the transmit power of the NodeB side, a path loss weighting coefficient can be considered. In the implementation, a switch control can be set to determine whether the weighting is needed in the current situation. The weighting method cannot be - enumeration, formula 1, formula 2 is the calculation method of two kinds of weights. Equation 1 considers that the maximum downlink transmit power of all cells is the same. Equation 2 considers that the maximum downlink transmit power of all cells may be different.

The function of the path loss weighting process is to correct the potential interference severity of the same-frequency neighboring area. Because TCP is only the transmitting power of the base station and there is no path loss, it needs to be corrected to avoid the TCP of the farther cell and the nearest cell. However, it may cause a different impact on the UE. Therefore, in the embodiment, Equation 1 and Equation 2 are taken as an example for implementation; however, in theory, other methods are also possible, as long as the potential interference strength of the same frequency neighboring region can be corrected, Equation 1 Equation 2 is only used to teach the person skilled in the art how to implement the invention in detail, but it does not mean that only Equation 1 and Formula 2 can be used, and the corresponding path loss weighting processing manner can be determined in the implementation process in combination with practical needs.

Then, if the switch is turned on, the neighbor TCP value can be processed as: P' = TCP χ ΐ θ ¹⁰

"' ^h "'^h; if closed, use the current TCP value directly

TCP' = TCP

"", ^h . The meaning of its value is still a percentage.

In the implementation, after obtaining the TCP measurement value of each downlink time slot of each of the interfering neighboring cells, whether the target cell is included in the interference effect may be considered. Therefore, further, the method may further include: Obtaining TCP of each downlink time slot of the current cell, and determining a time slot priority according to the TCP of the current cell and each interfering neighboring cell.

In a specific implementation, when the target cell is included in the interference impact, a switch may be simply set to control whether the target cell is taken into consideration. If the switch is turned on, the TCP of the cell is included in the final priority consideration. Otherwise, only the neighboring area calculation except the target cell is used.

After determining the TCP for determining the priority of the time slot according to the above manner, in step 202, the following can be implemented:

p II

j ,h

Where j and h respectively represent the hth downlink time slot of the jth carrier of the cell, and N is the number of interference neighboring cells.

p

The i subscript represents the current interfering cell, and t is the target cell, which is the priority of the hth downlink time slot of the jth carrier.

ΤΓΡ

For , in mode 1, because the TCP value is used directly, it can also be replaced.

TCP'

Of "^'h That is, if the switch is opened, the TCP values neighboring processed as _{_{follows: TCP'. H = TCP jJ}} , x lO w if closed, the direct use of the current TCP number ^{^{^{7 ^ '= 7 ° ^ ¾}}} . Its The meaning of the value is still a percentage.

MaxTransPowei is the maximum transmit power of the cell. It is an important parameter of the RNC. Generally, the parameter can be seen through the operation and maintenance interface, that is, the parameter can be learned by the RNC.

In a specific implementation, when calculating the time slot priority, according to the obtained measurement value and the control of the two switches, the total interference value may be counted for the hth downlink time slot of the jth carrier of the target cell, where N is the interference neighbor. The number of zones; thus, the TCP measurement value, the control of two switches, and the weight loss weighting are considered, and the time slot priority is finally obtained. Since there are many specific calculation methods, as long as the total interference value of one time slot can be counted Can be used, here can not - enumerate, in the above two ways, Equation 3 describes a priority calculation method that does not consider the target cell TCP; Equation 4 describes a priority considering the target cell TCP Calculation.

Way two

When the carrier and the downlink time slot TCP period of each cell in the current RNC are updated for the interference coordination reference, since the TCP is a common measurement value of the NodeB, the downlink time slot may have multiple UEs with different positions. The orientation relationship between these UEs and the current handover UE is different, and the interference caused is also different. Therefore, further, it can be implemented as follows to achieve a more accurate downlink interference assessment.

1. Obtain the AOA (Analog of Arrival) and the TCP-specific measurement information of the users of all the cells and the time slots of the current RNC. In the specific implementation, these parameters can also be configured as the NodeB periodic report or event report. Obtain

2. The PCCPCH-RSCP information of all connected UEs in the current RNC is obtained. In the specific implementation, the parameters may be reported as UE periodic reporting or event reporting. The reporting manner may include:

1) Configure all UEs to report pilot measurements.

2), introduce a new event definition, trigger the UE to report the measurement report when the entry condition is met or the departure condition is met. The measurement report for general switching only reports the measurement report when the entry condition is met. In order to support the measurement report required for interference coordination, the UE is also triggered to report the measurement report when the departure condition is satisfied. Whether to report the measurement report when the departure condition is met can pass a parameter ReportOnLeave controls. For details, refer to the A3 event implementation in TS36.331.

In the implementation, the interference of each time slot can be corrected according to the GOB pattern according to the AOA of each carrier and the user of each time slot.

The meaning of the correction is to look up the user AOA direction on the GOB pattern and obtain the actual shaping gain in the direction for the subsequent weighting of the transmission power to reflect the role of the smart antenna shaping.

The following is an explanation of the implementation of the downlink interference based on the angle division of the AOA reported by each user.

For a single user per time slot, TCP is directly stored in the maximum direction corresponding table unit.

For the case of multiple users per time slot, it is necessary to calculate separately and then integrate one maximum direction unit storage. The calculation method is as follows:

The RNC side saves the GOB (Grid Of Beam) pattern of the matching antenna type of different cells, according to the AOA estimation, the AOA direction is the maximum value in the pattern, and the maximum value in the shaping direction is An angle within a threshold (for example, 3 dB) is confirmed to be in the position in the table below. For multiple users, it is necessary to superimpose the patterns of multiple users and consider the angles within the threshold range with the maximum value of the shaping direction.

For the above method, only the angular interference in the maximum direction is saved, and the influence of the side lobes is not carefully considered. It is considered that the completed user direction superposition is more carefully considered, and the superimposition is performed in the next step to obtain a better effect. Due to the inaccuracy of the pattern estimation, this may be more effective for larger angular differences.

The RNC side can periodically maintain an interference reference that takes into account the direction. Here, a switch can be used to consider interference evaluation with different accuracy. When the switch is turned off, consider a rough evaluation, that is, the following table is selected for each cell selection, and any distance can be selected for the angle range. Only one of the following is illustrated:

For a certain carrier, taking a sector as an example, a value is reserved every 10 degrees, and TCP indicates the direction-weighted slot transmit power.

TCP' TS1 TS2 TS3 TS4 TS5 TS6 AOA angle range

-59 to -50

-49 to -40

-9 to 0

1 to 10

11 to 20

51 to 60 When the switch is turned on, according to the PCCPCH-RSCP reported in the previous user cycle, the path loss per user is:

PathLoss = PCCPCH Power - PCCPCH RSCP (Equation ₅ ), after obtaining the path loss of each UE, it can approximate the interference of each downlink time slot of a certain carrier of the current cell to other cells. For many methods, only two are listed here. Kind:

For the K users of the hth downlink slot of the jth carrier, consider the impact of its occupied resources and path loss:

BRU _NUM _k is the number of BRUs (Basic Resource Units) occupied by the kth user. For the K users of the hth downlink time slot of the jth carrier, consider the occupied resources and path loss and the influence of the AOA: Coeff AOA_est _ik ) - PathLoss _ik )

Formula 7

among them:

p^k The shape gain found on the GOB pattern.

The RNC side period maintains an interference reference quantity that takes into account the direction. For each cell, a period of maintenance is maintained as follows: TCP, indicating the direction-weighted slot transmit power

For a UE that currently needs to use a new resource in a target cell, the RNC can use the interference reference information obtained in the first two steps to perform interference avoidance.

TCP, which is the corrected TCP value, is still reported as a percentage of the maximum transmit power. By a certain processing method, the TCP' in the neighboring area between the boards (the RSPA board) can be obtained in the storage area of the neighboring area information of the board.

For the N co-frequency neighbors of all current time slots, the h-th downlink time slot of the j-th carrier of the target cell is calculated for its priority. Since there are many statistical methods, here are only two examples: When the switch is turned on,

Pj,h ~

TCP ij,h,AOA

=1 (Formula 8)

When the accurate evaluation switch is turned off,

N

i=\

TCP'

It can be seen from the above implementation. In the first method, ', the calculation method is:

TCP = Γ3⁄4 χ 103⁄4 or TCP; _jJt = TCP _ijh . ρ· ^ is calculated as: N MaxTransPower _t +a _t

∑TC^ _h xio 10

i=\

Or,

MaxTransP ow er _t ]\[ MaxTransP ow er + _f

TCP' _h xl0 ^ο + ΥΓ^ , xlO 10

=1 In mode 2, ^{7 :} ^ is calculated as:

Or,

TCP' _{] kh} = ^TCPl ' ^kh / _{BRU NUM} x Directional _ Coeff(AOA _ est _lk ) - PathLoss _lk ) k=\ / — k _o

^ ^ Calculation method is:

Ν

Pj,h = P],h = TCP, _u , _h

or.

Among them, the first method is a simplified evaluation method; the second method is a more accurate evaluation method; both methods use the TCP statistic, and the first method uses a parameter alpha to represent the weighting coefficient of the path loss change; In addition to TCP, mode 2 also selects the directional coeff and the athloss for each UE, so it is more accurate than alpha.

3. Determination of the cell for interference coordination.

When determining the slot priority, each interfering neighbor cell needs to be determined. The following describes how to determine the interfering neighbor cell.

FIG. 3 is a schematic flowchart of a method for determining a cell for performing interference coordination, and as shown in the figure, the following steps may be included: Step 301: Obtain a measurement report reported by the UE.

Step 302: Obtain pilot measurement results of the source cell, the target cell, and other neighboring cells according to the measurement report.

Step 303: Determine, according to the pilot measurement result, a cell that performs interference coordination.

When obtaining the measurement report reported by the UE, the measurement report can be obtained by one or a combination of the following methods:

The measurement report is obtained by the same-frequency event reported by the UE during the handover process, the measurement report is obtained by the inter-frequency event reported by the UE during the handover process, and the measurement report is obtained by the internal measurement report reported by the UE during the handover process.

Specifically, in the implementation of steps 301 and 302, the source may be obtained according to the same-frequency event (such as 1G), the inter-frequency event (such as 2A), and the internal (add-on-frequency/inter-frequency) measurement report reported by the UE during the handover process. The pilot measurement results of the cell, the target cell, and other neighboring cells, and the neighbor cell list of the target cell is obtained, which can be recorded as an AdjCellList in the implementation.

In the implementation, the acquisition of the pilot measurement result is performed for the resource selection in the handover scenario. Therefore, in order to simplify the implementation, the handover measurement reporting information may be used to select a cell to perform interference coordination. Of course, each NodeB and the RNC may be configured. The UE measures the report, but this implementation is more complicated.

In the implementation of step 303, when determining the cell for interference coordination according to the pilot measurement result, the cell performing interference coordination may be determined as follows:

PCCPCH― RSCP _{TA TCEU} - PCCPCH― RSCP^,^ < δ (Formula

10), where:

PCCPCH _ RSCP _TARGETCELL is the pilot measurement result value of the target cell, and PCCPCH _ RSCPQ^C^ is the pilot measurement result value of the neighboring cell i, which is the pilot difference between the target cell and the neighboring cell. In implementation, in order to avoid too much This threshold is set for the selection of weak neighbors.

ΡΓΓΡΓΗ ^CP

Where - PCCPCH is the basic common control physical channel ( Primary Common Control Physical Channel ), RSCP is the Received Signal Code Power. This value is chosen because it is generally considered to be "received pilot signal strength", is a UE accessing the cell, and is an important parameter used in handover cell decisions, ie, this value must be greater than a certain threshold before it can be connected. In (for example, -85dBm), the difference between the two cells is greater than a certain threshold to determine the handover, so this value is one of the key factors, so select it. In the implementation, other parameters can also be used, which is to achieve the same effect.

Specifically, for each neighboring cell, the judgment can be made by looking up the pilot measurement result of each cell in the AdjCellList.

Further, the implementation may further include: adding, when the source cell is not included in the cell for performing interference coordination according to the pilot measurement result, adding the source cell to the cell performing interference coordination.

Specifically, a list of all the neighboring neighbors that satisfy the formula 10 is obtained; if the source cell is not included in the list, the supplementary is added, and the pilot of the source cell is considered as

1⁄2TP _rargeiCe „ Switching the relative threshold to increase the weighting consideration for the interference of the source cell. In implementation, Equation 10 does not include the judgment of the source cell, but after obtaining the list of all the interference neighbors satisfying Equation 10, if in the list If the source cell is not included, the join is added, and the pilot of the source cell is considered to be the PCCPC-Cw" cut-off pair π limit to increase the weighting consideration for the source cell interference. Since the target cell should be larger than the source cell by N dB, that is, the handover related threshold in the formula, the weighting of the target cell is the target cell pilot value-relative threshold.

The purpose of the foregoing implementation is to: determine the range of the interference coordination candidate cell by using the neighboring area of the handover measurement report; and remove the neighboring area with weak interference according to the received power difference of each neighboring area in the interference coordination candidate cell according to the handover UE In order to avoid excessive processing and increase the error; finally, the source cell is added to make the interference consideration more comprehensive. The radio network controller of the sequence mode is similar to the method for accessing the device according to the priority of the slot priority. Therefore, the implementation of the device can refer to the implementation of the method, and the repeated description is not repeated. As shown in the figure, after determining the time slot priority, the radio network controller may include:

The masking module 401 is configured to block, in the current SDCA time slot priority queue, a DL time slot with a TCP interference value greater than a threshold;

The first access module 402 is configured to perform access according to the masked SDCA time slot priority list, and the speed reduction module 403 is configured to perform slowdown on the failed access UE.

The second access module 404 is configured to: if the access fails after the speed reduction, and all the UL and DL are implemented, the first access module may be further configured to use different resources according to the service, according to the carrier priority and time. Gap priority ordering.

In the implementation, when determining the priority of the time slot required by the first access module, the wireless network controller may further include:

The TCP obtaining module 405 is configured to acquire TCP of each downlink time slot of each interfering neighbor cell that performs interference coordination;

The priority determining module 406 is configured to determine a slot priority according to the TCP.

In an implementation, the TCP obtaining module may be further configured to obtain the TCP from a storage area of the neighboring area information of the local RSPA.

In implementation, the TCP acquisition module may further be used to process TCP in the following manner:

ΤΓΡ' = TCP x 1

", ^h "' ^h , where: A is the road loss weighted value calculated by PCCPCH information;

When the PCCPCH transmit power of each cell is the same:

a _i = {PCCPCH _ RSCP _l - PCCPCH _ RSCP _t ) Or, when the PCCPCH transmit power of each cell is different:

a _t = (PCCPCH _ RSCPi - PCCPCH _ Power, ) - {PCCPCH _ RSCP _t - PCCPCH _ Power _t ) , where: The i subscript represents the current interfering cell, the t subscript represents the target cell, and the unit is dB, j, h respectively represent the hth downlink time slot of the jth carrier of the cell, and represents the path loss weighting coefficient of the i th interference cell Value, PCCPCH _RSCP is the pilot measurement result value, and PCCPCH-Power represents the transmit power of PCCPCH.

In an implementation, the priority determining module may be further configured to determine, according to the determining the time slot priority according to the TCP, the following formula:

p _ = i=l

j, N MaxTransPow er _i

L0 ^ ^ ^ , where:

i=\

j, h j-th carrier respectively represent the h-th cell downlink time slots, N being the number of neighboring cell interference, pi subscript represents the current cell interference, MaxTransPowei. The cell is the maximum transmission power, J ^'h is the j The priority of the h th downlink slot of each carrier.

In an implementation, the TCP obtaining module may be further configured to obtain each downlink time slot of the local cell.

TCP;

The priority determining module may be further configured to determine a slot priority according to the TCP of the current cell and each interfering neighboring cell.

In the implementation, the priority determining module may further be used to: when determining the priority of the time slot according to the TCP, the following processing:

i=\

among them:

j, h respectively represent the hth downlink time slot of the jth carrier of the cell, where N is the number of interference neighboring cells, The i subscript represents the current interfering cell, t is the target cell, ^{MaxTmnsP() We1} "' is the maximum transmit power of the cell, and ^ is the priority of the ^hth downlink slot of the jth carrier.

In an implementation, the TCP acquisition module may be further configured to obtain PCCPCH-RSCP information of all connected UEs in the current RNC; and obtain a path loss of each UE according to the following formula:

PathLoss = PCCPCH Power - PCCPCH RSCP, where

PathLoss is the path loss of the UE, PCCPCH Power is the _PCCPCH transmit power, and PPCCPCH _RSCP is the pilot measurement result of ^. In an implementation, the TCP acquisition module may be further configured to process the TCPs of the K users of the hth downlink time slot of the jth carrier in the following manner:

κ (TCP

TCP' j,k, =Σ - PathLoss,

, B BRIT ΝΠΜ, ,k where k=l / RU— NUM _k k

SRf / _ _t is the number of basic resource unit BRU k-th user occupied. In the implementation, the priority determining module may further be used to: when determining the time slot priority according to the TCP, the following processing:

For the N co-frequency neighbors of all current time slots, for the th thth carrier of the target cell

N line slots, ^z=1 .

Considering the AOA factor, the wireless network controller can further include:

The AOA obtaining module 407 is configured to acquire an AOA of a user of each cell and a time slot of all cells in the current RNC.

In the implementation, the TCP acquisition module may be further configured to correct the interference of each time slot according to the GOB pattern according to the AOA of the user of each carrier and each time slot.

In an implementation, the TCP acquisition module may be further configured to process the TCPs of the K users of the hth downlink time slot of the jth carrier in the following manner:

, where: ^to^— O^^O^—e ;) is the shaping gain found on the _G0 B pattern.

For the N co-frequency neighbors of all current time slots, for the jth downlink time slot of the jth carrier of the target cell, ^r j,h

In the implementation, when the cell that needs to perform interference coordination required by the TCP acquisition module needs to be determined, the wireless network controller may further include:

The measurement module 408 is configured to obtain a measurement report on the UE.

The measurement result module 409 is configured to obtain pilot measurement results of the source cell, the target cell, and other neighboring cells according to the measurement report;

The interference cell determining module 410 is configured to determine a cell for interference coordination according to the pilot measurement result.

In an implementation, the measurement result module may be further configured to: when acquiring the measurement report reported by the UE, obtain the measurement report by using one or a combination of the following manners:

In an implementation, the interfering cell determining module may be further configured to: when determining, according to the pilot measurement result, the cell that performs interference coordination, determine, according to the following manner, the cell that performs interference coordination:

PCCPCH _RSCP _T&xgetCell -PCCPCH_RSCP _0therCell _ ₁ <S where:

PCCPCH _RSCP _{Tw etCell} is the pilot measurement result value of the target cell, PCCPCH _ RSCPo^c^ is the pilot measurement result value of the neighboring cell ^, which is the pilot difference between the target cell and the neighboring cell.

In an implementation, the interfering cell determining module may be further configured to: when the cell that performs interference coordination according to the pilot measurement result does not include the source cell, add the source cell to the cell that performs interference coordination.

In an implementation, the interfering cell determining module may be further configured to switch the pilot of the source cell to a relative threshold according to the PCCPCH_RSCP _TargetCell . For convenience of description, the various parts of the above described devices are described in terms of functions divided into various modules or units. Of course, the functions of the various modules or units may be implemented in one or more software or hardware in the practice of the invention.

The technical solution provided by the embodiment of the present invention is as follows:

The co-channel interference reference of the target cell is obtained by using the common measurement amount on the UTRAN side. The interference coordination neighbor information of the current UE is obtained by using the dedicated measurement of the UE.

The neighboring area is controlled to participate in the interference coordination algorithm by using the pilot difference threshold of the neighboring area.

The potential interference strength of the neighboring area is corrected by any path loss weighting method.

Further consideration is given to the special handling of the source cell weighting values.

Use two rounds of carrier, time slot selection, and so on.

The technical solution provided by the embodiment of the present invention can enable the UE to be accessed in the target cell to select a resource with less downlink interference to use, thereby avoiding strong interference or strong interference, and improving user service quality.

Those skilled in the art will appreciate that embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the invention can be embodied in the form of one or more computer program products embodied on a computer-usable storage medium (including but not limited to disk storage, CD-ROM, optical storage, etc.) in which computer usable program code is embodied.

The present invention is directed to a method, apparatus (system), and computer program according to an embodiment of the present invention. The flow chart and/or block diagram of the product is described. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

Although the preferred embodiment of the invention has been described, it will be apparent to those skilled in the < Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and the modifications and modifications The spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and variations of the inventions

Claims

Rights request

A method for accessing by slot priority ordering, comprising: the following steps:

In the current slow dynamic channel allocation SDCA time slot priority queue, shielding the carrier transmit power TCP interference value is greater than the threshold downlink DL time slot;

Access according to the masked SDCA time slot priority list;

Decelerating the user equipment UE that fails to access;

If the access fails after the speed reduction, all uplink UL time slots and DL time slots are followed.

2. The method of claim 1, further comprising:

The slot priority of all UL slots and DL slots is determined according to the number of resources occupied by the service.

The method according to claim 1 or 2, wherein when determining the priority of the time slot, the method includes:

The slot priority is determined according to TCP.

The method according to claim 3, wherein the TCP is acquired from a storage area of neighboring area information of the local wireless network signaling processing board RSPA.

The method according to claim 3, wherein after acquiring the TCP of each downlink time slot of each interference neighboring cell that performs interference coordination, before determining the time slot priority according to the TCP, performing the following manner on the TCP deal with:

TCP' _h = TCP _iih x W° TCP; _ih = TCPi _ih where: is the path loss weighting value calculated by the basic common control physical channel PCCPCH information; When the PCCPCH transmit power of each cell is the same:

a _t = (PCCPCH _RSCP _j - PCCPCH-Power ) - (PCCPCH _RSCP _t - PCCPCH _Power _t ) , where:

The i subscript represents the current interfering cell, the t subscript represents the target cell, and the unit is dB, j, h respectively represent the hth downlink time slot of the jth carrier of the cell, and represents the path loss weighting coefficient of the i th interference cell Value, PCCPCH _RSCP is the pilot measurement result value, and PCCPCH-Power represents the transmit power of PCCPCH.

6. The method according to claim 5, wherein when determining the priority of the time slot according to the TCP, determining according to the following formula:

p = i=\

j, N MaxTransPow er _i

L0 ^ ^ ^ , where:

i=\

Obtaining TCP of each downlink time slot of the current cell, and determining a time slot priority according to the TCP of the current cell and each interfering neighboring cell.

8. The method according to claim 7, wherein determining the time slot priority according to the TCP comprises:

i=\

, among them:

j, h respectively represent the ^hth downlink time slot of the jth carrier of the cell, N is the number of interference neighboring cells, 1 subscript represents the current interfering cell, t is the target cell, and ^{MaxTmnsP() We1} "' is the largest of the cell Transmit power, ^ is the priority of the hth downlink time slot of the jth carrier.

The method according to claim 3, wherein after obtaining the TCP of each downlink time slot of the interference neighboring cell for interference coordination, before determining the time slot priority according to the TCP, the method further comprises:

Obtain PCCPCH-RSCP information of all UEs connected to the user equipment under the current radio network controller RNC;

The path loss of each UE is obtained as follows:

PathLoss = PCCPCH Power - PCCPCH RSCP, where PathLoss is the path loss of the UE, PCCPCH Power is the _PCCPCH transmit power, and PPCCPCH _RSCP is the pilot measurement result of ^.

10. The method according to claim 9, wherein the TCP of the K users of the hth downlink time slot of the jth carrier is processed in the following manner:

— NUM k _k - ^PathL ° ^{SSi k )} , where:

SRf/ _ _t refers to the number of basic resource unit BRUs occupied by the kth user.

The method according to claim 10, wherein determining the time slot priority according to the TCP comprises:

For the N co-frequency neighbors of all current time slots, for the jth carrier of the j-th carrier of the target cell N line slots, ^z=1 .

12. The method of claim 9, further comprising:

Obtain the reach angle AOA of the users of all cells and time slots of all cells in the current RNC.

13. The method of claim 12, further comprising:

According to the AOA of each carrier and each time slot user, the interference of each time slot is corrected according to the beam scanning method GOB pattern.

14. The method according to claim 13, wherein the 第th of the hth downlink user of the jth carrier

, where: ^to^— O^^O^—e ;) is the shaping gain found on the _G0 B pattern.

The method according to claim 14, wherein determining the time slot priority according to the TCP comprises:

N

Line time slot, ^r j, h ¹ ^ ¹ ^ iJAAOA .

z'=l °

The method according to any one of claims 3 to 15, wherein: determining each interfering neighbor cell for interference coordination comprises:

Obtaining a measurement report reported by the UE;

The method according to claim 16, wherein when the measurement report reported by the UE is obtained, the measurement report is obtained by one or a combination of the following manners:

Obtaining a measurement report by the same-frequency event reported by the UE during the handover process, and the UE during the handover process The reported inter-frequency event acquisition measurement report acquires the measurement report by the internal measurement report reported by the UE during the handover process.

18. The method according to claim 16, wherein when determining a cell for interference coordination according to a pilot measurement result, determining a cell for interference coordination is determined as follows:

PCCPCH _ RSCP _{T axg etCell} - PCCPCH _ RSCP _0therCell _ ₁ < S where:

PCCPCH _ RSCP _{Tw etCell} is the pilot measurement result value of the target cell, and PCCPCH _ RSCPo^c^ is the pilot measurement result value of the neighboring cell ^, which is the pilot difference between the target cell and the neighboring cell.

The method of claim 16, further comprising:

When the source cell is not included in the cell that performs interference coordination according to the pilot measurement result, the source cell is added to the cell for interference coordination.

The method according to claim 19, wherein the pilot of the source cell is a PCCPCH _RSCP _TargetCell — ^^ switching relative threshold

A radio network controller, comprising:

a first access module, configured to perform access according to the masked SDCA time slot priority list; and a speed reduction module, configured to perform a slowdown on the failed access UE;

a second access module, if the access fails after the speed reduction, all UL time slots, DL time

The radio network controller according to claim 21, wherein the first access module is further configured to determine a slot priority of the all UL time slots and DL time slots according to the number of resources occupied by the service.

The radio network controller according to claim 21 or 22, further comprising: a TCP obtaining module, configured to acquire TCP of each downlink time slot of each interference neighboring cell that performs interference coordination;

The radio network controller according to claim 23, wherein the TCP obtaining module is further configured to acquire the TCP from a storage area of the neighboring area information of the local RSPA.

The radio network controller according to claim 23, wherein after the TCP acquisition module acquires the TCP of each downlink time slot of the interference neighboring cell that performs interference coordination, the priority determining module determines the time slot according to the TCP. Before the priority, it is further used to process the obtained TCP in the following manner:

TCP' _h = TCP _iih x W° TCP; _ih = TCPi _ih where: is the path loss weighted value calculated by the PCCPCH information;

When the PCCPCH transmit power of each cell is the same:

a _t = (PCCPCH _ RSC - PCCPCH _ Power, ) - {PCCPCH _ RSCP _t - PCCPCH _ Power _t ) , where:

The i subscript represents the current interfering cell, the t subscript represents the target cell, and the unit is dB, j, h respectively represent the hth downlink time slot of the jth carrier of the cell, and represents the path loss weighting coefficient of the i th interference cell Value, PCCPCH _RSCP is the pilot measurement result value, PCCPCH-Power represents

The transmit power of the PCCPCH.

The radio network controller according to claim 25, wherein the priority determining module is further configured to: when determining the time slot priority according to the TCP, determine according to the following formula: N MaxTransPowe^ +a _t

10

p _ = i=l

j, N MaxTransPow er _i

L0 ^ ^ ^ , where:

i=\

The radio network controller according to claim 21 or 22, further comprising:

a TCP acquisition module, configured to acquire TCP of each downlink time slot of the local cell;

The priority determining module is configured to determine a time slot priority according to the TCP of the current cell and each interfering neighboring cell.

The radio network controller according to claim 27, wherein the priority determining module is further configured to: when determining the slot priority according to the TCP, the following processing:

P =

j,h

i=\

, among them:

j, h respectively represent the hth downlink time slot of the jth carrier of the cell, N is the number of interference neighboring cells, the i subscript represents the current interfering cell, t is the target cell, and MaxTransPower, is the maximum transmit power of the cell, _A is the priority of the hth downlink slot of the jth carrier.

The radio network controller according to claim 23, wherein after the TCP acquisition module acquires the TCP of each downlink time slot of each interference neighboring cell that performs interference coordination, when the priority determining module determines according to the TCP Before the gap priority, it is further used to obtain all the connections under the current RNC. Receive the PCCPCH-RSCP information of the UE; and obtain the path loss of each UE as follows:

PathLoss = PCCPCH _ Power - PCCPCH _ RSCP, where

PathLoss is the path loss of the UE, PCCPCH Power is the PCCPCH transmit power of the UE, and PPCCPCH _RSCP is the pilot measurement result value of the UE.

30. The radio network controller according to claim 29, wherein the TCP acquisition module is further configured to use the jth carrier number

Processing: NUM _: ^amL0SS k where

SRf / _ _t is the number of basic resource unit BRU k-th user occupied.

The radio network controller according to claim 30, wherein the priority determining module is further configured to: when determining the slot priority according to the TCP, the following processing:

N line slots, ^z=1 .

The radio network controller according to claim 29, further comprising: an AO A acquisition module, configured to acquire an AOA of each cell of each cell and each time slot of the current RNC.

The radio network controller according to claim 32, wherein the TCP acquisition module is further configured to correct the interference of each time slot according to the GOB pattern according to the AOA of the user of each carrier and each time slot.

34. The radio network controller of claim 33, wherein the TCP acquisition module is further configured to use the jth carrier number

deal with:

TCP' j,k,h,AOA /M x Directional _ Coeff {AOA _ est _jk ) - PathLoss . _k )

, where: "^^- ^^^^- is the shaping gain found on the GOB pattern.

The radio network controller according to claim 34, wherein the priority determining module is further configured to: when determining the slot priority according to the TCP, the following processing:

N

Line time slot, ^r j, h ¹ ^ ¹ ^ iJAAOA .

z'=l °

36. The radio network controller of any of claims 23 to 35, further comprising:

The radio network controller according to claim 36, wherein the measurement result module is further configured to: when acquiring the measurement report reported by the UE, obtain the measurement report by one or a combination of the following manners:

The radio network controller according to claim 36, wherein the interfering cell determining module is further configured to: when determining a cell that performs interference coordination according to the pilot measurement result, determine a cell that performs interference coordination according to the following manner:

PCCPCH _ RSCP _{T axg etCell} - PCCPCH _ RSCP _0therCell _ ₁ < S where:

PCCPCH _ RSCP _{Tw etCell} is the pilot measurement result value of the target cell, PCCPCH _ RSCPo^c^ is the pilot measurement result value of the neighboring cell ^, which is the pilot difference between the target cell and the neighboring cell.

The radio network controller according to claim 36, wherein the interfering cell determining module is further configured to: when the cell that performs interference coordination according to the pilot measurement result does not include the source cell, add the source cell to perform Interference in coordinated cells.

The radio network controller according to claim 39, wherein the interfering cell determining module is further configured to switch the pilot of the source cell to a threshold threshold according to ^CC C ⁷⁷ - ^RSCP ^etCell.