WO2011160353A1

WO2011160353A1 - Method and device for implementing pseudo pilot

Info

Publication number: WO2011160353A1
Application number: PCT/CN2010/077474
Authority: WO
Inventors: 罗夙
Original assignee: 中兴通讯股份有限公司
Priority date: 2010-06-21
Filing date: 2010-09-29
Publication date: 2011-12-29
Also published as: CN101877610B; CN101877610A

Abstract

The present invention discloses a method and device for implementing pseudo pilot, and the method includes: configuring a pseudo pilot carrier frequency; according to the system requirement, setting up the number of the pseudo pilots on the pseudo pilot carrier frequency; configuring the frequency points of air interface corresponding to the pseudo pilots, wherein the number of the frequency points of air interface is equal to the number of the pseudo pilots; copying the signal of the pseudo pilot carrier frequency, wherein the number of the copies is equal to the number of the pseudo pilots; separately transmitting the copied signals of the pseudo pilot carrier frequency to the frequency points of the air interface. By the present invention, the cost for the operators to implement the device for pseudo carrier frequency is reduced.

Description

TECHNICAL FIELD The present invention relates to the field of communications, and in particular to a method and an apparatus for implementing a pseudo pilot. BACKGROUND In a Code Division Multiple Access (CDMA) network, the number of frequency points configured by different sites may be different according to the requirements of network coverage. For example, an indoor coverage station (indoor micro-station) has a small capacity, and generally has one frequency point to meet the demand; while the outdoor station covers a long distance (outdoor macro station), and the user volume is large, and multiple frequency points, such as Unicom, are configured. The CDMA network will be configured with 4 frequency points. When the mobile station is locked in the outdoor fl or f2 or β frequency, when moving from the outdoor to the indoor, whether it is the talk state or the idle state, it can be smoothly locked indoors by the pilot signal of the indoor station η or β or β frequency. At a frequency, as shown in Fig. 1, the pilot signal of η or β or β is also referred to as a pseudo pilot signal. Pseudo-pilot is very important for the CDMA unbalanced network type. It can ensure that the mobile phone switches from the original hard switch to the soft switch in the switch using different carriers, thus reducing the dropped call rate of the mobile phone. For example: The mobile station uses the carrier frequency fl communication (talk state) under the outdoor base station, and when the mobile station gradually moves away from the outdoor base station and close to the indoor base station, the indoor base station only provides the service with the carrier frequency K). The signal of the outdoor base station η received by the mobile station becomes weaker and weaker, and the signal of the indoor base station is gradually enhanced, and can only be switched by the hard handover mode, and an interrupt of 30 milliseconds is generated. Since the success rate of the inter-frequency hard handover of different base stations is very low, it is very easy to form a call drop phenomenon. In this case, the indoor base station configures a pseudo pilot signal. When the mobile station is under the carrier frequency and moves from the outdoor base station to the indoor base station, the mobile station continuously detects the pilot signal strength of the same frequency of the nearby base station. When the pilot signal parameter of the η frequency point of the indoor station exceeds the threshold, the mobile station actively sends a Pilot Strength Measuring Message (PSMM) to the base station. After receiving the message, the indoor base station queries the configuration information of the base station, and finds that the pilot signal of the fl frequency point is actually a pseudo pilot signal, and does not have the possibility of providing a traffic channel. Only the K) frequency point can allocate a traffic channel, so the allocation is performed. K) Traffic channel resources of the frequency point for the mobile station to implement handover. The mobile station completes the handover from the outdoor station fl to the indoor station K) with the help of the pseudo pilot of the indoor station fl frequency, thereby ensuring smooth handover. Since this process is a soft handover, it does not drop calls, thereby increasing the success rate of handover. For example, the mobile station is in the standby frequency of the outdoor base station fl (non-talk state, that is, the standby state). When the mobile station moves from the outdoor to the indoor mobile, since the indoor station has only the carrier frequency and no fl carrier frequency, the mobile station When the originating call is initiated, since the outdoor η is weak except for the pilot channel, the signal of the other channel is difficult to be transferred to the outdoor traffic channel during the call-out process, causing the call to fail. In this case, the indoor base station also needs to configure a pseudo pilot signal. When the mobile station moves from the outdoor to the indoor, the n-signal of the same frequency is detected, and the ω signal of the indoor station can be smoothly switched to standby. At this point, the call-up process can be completed under various channels of the indoor station. In the related art, a base station equipment provider generally uses a single set of radio frequency equipment and a baseband carrier frequency to transmit one pseudo pilot signal, and one pseudo pilot occupies one baseband carrier frequency, and needs to be configured as a pseudo pilot. Carrier frequency, only the pilot channel is configured, and no other control channels are configured. For example: a common carrier frequency ffi is configured in a certain sector, and three pseudo pilots fl, f2, and β are configured. The frequency and content of each pseudo pilot are different. The transmission mode is as shown in Figure 2. . However, the implementation of the pseudo pilot has a requirement on the number of carriers that the baseband modulation and demodulation chip can support, that is, the system baseband modulation and demodulation chip and the radio frequency system can support a sufficient number of carriers. The number of fans supported by the chip is completely dependent on the chip supplier. If the chip introduced by the chip supplier supports only two carrier fans, the pseudo pilot configuration cannot be implemented for a system that requires multiple pseudo pilots, and the number of carrier fans supported by the baseband modulation and demodulation chip is larger, and the baseband modulation solution The higher the cost of the chip, the higher the equipment cost of the operator. SUMMARY OF THE INVENTION A primary object of the present invention is to provide a method and apparatus for implementing a pseudo pilot to solve at least one of the above problems. In order to achieve the above object, according to an aspect of the present invention, a pseudo pilot implementation method is provided. The method for implementing the pseudo pilot according to the present invention includes: configuring a pseudo pilot carrier frequency; setting the number of pseudo pilots on the pseudo pilot carrier frequency in the system requirement; and configuring the air interface frequency corresponding to the pseudo pilot, where The number of frequency points of the air interface is equal to the number of pseudo pilots; the signal of the pseudo pilot carrier frequency is copied, wherein the number of copies is equal to the number of pseudo pilots; the signals of the copied pseudo pilot carrier frequencies are respectively Launch to air frequency Before copying the signal of the pseudo pilot carrier frequency, the method further includes: configuring a normal carrier frequency; configuring a signal of the pseudo pilot carrier frequency, wherein the signal includes a pilot signal and a synchronization signal; and configuring the signal of the pseudo pilot carrier frequency The frequency field in the synchronization channel message is the frequency field of the normal carrier frequency. The frequency field in the synchronization channel message of the signal configuring the pseudo pilot carrier frequency is the frequency field of the normal carrier frequency, including: Configuring the code division multiple access frequency field in the synchronization channel message CDMA FREQ and the frequency field of the code division multiple access extension EXT CDMA FREQ is the frequency of the ordinary carrier frequency. In order to achieve the above object, according to another aspect of the present invention, a pseudo pilot implementing apparatus is provided. The pseudo pilot implementation apparatus according to the present invention includes: a pseudo carrier frequency configuration module configured to configure a pseudo pilot carrier frequency; and a setting module configured to set a number of pseudo pilots on the pseudo pilot carrier frequency according to system requirements; The air interface frequency point configuration module is configured to configure an air interface frequency point corresponding to the pseudo pilot, wherein the number of air interface frequency points is equal to the number of pseudo pilots; and the copy module is configured to copy the pseudo pilot carrier frequency signal, The number of copies is equal to the number of pseudo pilots; the transmitting module is configured to transmit the signals of the copied pseudo pilot carrier frequencies to the air interface frequency points respectively. The device further includes: a normal carrier frequency configuration module configured to configure a normal carrier frequency; a signal configuration module configured to configure a pseudo pilot carrier frequency signal, wherein the signal includes a pilot signal and a synchronization signal; and a synchronization channel configuration module The frequency field in the synchronization channel message set to the signal configuring the pseudo pilot carrier frequency is the frequency field of the normal carrier frequency. The synchronization channel configuration module is configured to configure the code division multiple access frequency field CDMA FREQ in the synchronization channel message and the frequency field EXT CDMA FREQ of the code division multiple access extension to be the frequency of the normal carrier frequency. The pseudo carrier frequency configuration module, the setting module, the air interface frequency point configuration module, and the common carrier frequency configuration module are disposed in a background network management system. The copy module, the transmitting module, the signal configuration module, and the synchronization channel configuration module are disposed on a base station. According to the present invention, the frequency point field of the synchronization channel message of the pseudo pilot signal is filled in the frequency point information of the basic carrier frequency, and one pseudo pilot signal is duplicated according to the configuration requirement, and respectively transmitted to the radio frequency of different frequency points. On the channel, it is sent to the air interface, which solves the problem that the pseudo pilot signal in the related art completely depends on the baseband chip supporting the number of fans, which causes the application to be limited, and realizes a pseudo pilot carrier frequency branch. Multi-channel pseudo pilot signals are used, and the cost of equipment used by operators to implement pseudo carrier frequencies is reduced. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are set to illustrate,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, In the drawings: FIG. 1 is a schematic diagram of a pseudo pilot according to the related art; FIG. 2 is a schematic diagram of a method for implementing a pseudo pilot according to the related art; FIG. 3 is a flowchart of a method for implementing a pseudo pilot according to an embodiment of the present invention; 4 is a structural block diagram of a pseudo pilot implementation apparatus according to an embodiment of the present invention; FIG. 5 is a block diagram showing a preferred structure of a pseudo pilot implementation apparatus according to an embodiment of the present invention; FIG. 6 is a pseudo pilot implementation according to an embodiment of the present invention. A schematic diagram of a mode; and Figure 7 is a flow diagram of a pseudo pilot implementation in accordance with a preferred embodiment of the present invention. BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict. Embodiment 1 In this embodiment, a method for implementing a pseudo pilot is provided. FIG. 3 is a flowchart of a method for implementing a pseudo pilot according to an embodiment of the present invention. As shown in FIG. 3, the method includes: Step S302, Configuration a pseudo pilot carrier frequency; Step S304, setting the number of pseudo pilots on the pseudo pilot carrier frequency according to system requirements; Step S306, configuring an air interface frequency point corresponding to the pseudo pilot, where the number of air interface frequency points is equal to The number of pseudo pilots; step S308, copying the signal of the pseudo pilot carrier frequency, wherein the number of copies is equal to the pseudo pilot The number of the pseudo pilot carrier frequency signals is respectively transmitted to the air interface frequency point. Through the above steps, the pseudo pilot carrier frequency signal is copied, and the copied pseudo pilot signal is transmitted to the air interface frequency point, which overcomes the related art, one pseudo pilot uses one baseband carrier frequency, and the pseudo pilot configuration Fully limited by the number of sectors supported by the baseband modem chip, a pseudo pilot carrier frequency is supported to support multiple pseudo carrier frequency signals, and the cost of the device for implementing the pseudo carrier frequency is reduced. Preferably, before step S310, the method further includes: configuring a normal carrier frequency; configuring a signal of the pseudo pilot carrier frequency, wherein the signal includes a pilot signal and a synchronization signal; and configuring a synchronization channel message of the signal of the pseudo pilot carrier frequency The frequency field in is the frequency field of the normal carrier frequency. Through the configuration steps of the preferred embodiment, the configuration of the pseudo pilot signal includes only the pilot channel and the synchronization channel, and does not include the paging channel, which greatly reduces the transmission power of the pseudo pilot signal, and does not configure the paging channel, which can be reduced. 12% power consumption, thus reducing the interference of the pseudo pilot signal to other carrier frequencies. A preferred implementation manner of the frequency field in the synchronization channel message of the signal for configuring the pseudo pilot carrier frequency in the above step is the frequency field of the normal carrier frequency: configuring the code division multiple access frequency field in the synchronization channel message The frequency field EXT CDMA FREQ of CDMA_FREQ and code division multiple access extension is the frequency of the normal carrier frequency. Through the configuration step of the preferred embodiment, the code division multiple access frequency field in the synchronization channel message is configured as the frequency of the common carrier frequency, and the mobile station synchronizes the CDMA_FREQ and EXT_CDMA_FREQ fields in the synchronization channel message to search for the paging channel of the corresponding frequency point. . The CDMA_FREQ and EXT_CDMA_FREQ fields in the synchronization channel message are filled in as the frequency of the normal carrier frequency, and then the mobile station switches the pilot channel and the synchronization channel of the pseudo pilot signal according to the indications of the CDMA_FREQ and EX_CDMA_FREQ fields. The paging channel of the normal carrier frequency is searched for the purpose of standby on the normal carrier frequency. Embodiment 2 This embodiment combines Embodiment 1 and a preferred mode thereof. In this embodiment, a pseudo pilot implementation apparatus is provided, and FIG. 4 is a structure of a pseudo pilot implementation apparatus according to an embodiment of the present invention. The block diagram, as shown in FIG. 4, includes: a pseudo carrier frequency configuration module 42, a setting module 44, an air interface frequency point configuration module 46, a copy module 48, and a transmitting module 49. The above structure will be described in detail below. The pseudo carrier frequency configuration module 42 is configured to configure a pseudo pilot carrier frequency; the setting module 44 is coupled to the pseudo carrier frequency configuration module 42 and configured to set the pseudo pilot carrier frequency configured by the pseudo carrier frequency configuration module 42 according to system requirements. Number of pseudo pilots; air interface frequency point configuration module 46, connected to the pseudo carrier frequency configuration mode The block 42 and the setting module 44 are configured to configure the air interface frequency corresponding to the pseudo pilot on the pseudo pilot carrier configured by the pseudo carrier frequency configuration module 42, where the number of the air interface frequency points is equal to the number of the pseudo pilots; The copy module 48 is connected to the pseudo carrier frequency configuration module 42 and configured to copy the pseudo pilot carrier frequency configured by the pseudo carrier frequency configuration module 42 to be copied, wherein the number of copies is equal to the number of pseudo pilots; And connected to the replication module 48, configured to transmit the signals of the pseudo pilot carrier frequencies copied by the replication module 48 to the air interface frequency points, respectively. FIG. 5 is a block diagram showing a preferred structure of a pseudo pilot implementation apparatus according to an embodiment of the present invention. As shown in FIG. 5, the apparatus further includes: a normal carrier frequency configuration module 52, a signal configuration module 54, and a synchronization channel configuration module 56. The above structure will be described in detail. The normal carrier frequency configuration module 52 is configured to configure a normal carrier frequency; the signal configuration module 54 is coupled to the pseudo carrier frequency configuration module 42 and configured to configure the pseudo pilot carrier frequency configured by the pseudo carrier frequency configuration module 42, wherein The signal includes a pilot signal and a pilot signal; the synchronization channel configuration module 56 is connected to the normal carrier frequency configuration module 52, and the frequency field in the synchronization channel message of the signal configured to configure the pseudo pilot carrier frequency is the frequency of the normal carrier frequency. Field. A preferred embodiment of the frequency field in the synchronization channel message in which the synchronization channel configuration module 56 configures the signal of the pseudo pilot carrier frequency is the frequency field of the normal carrier frequency is as follows: Configuring code division multiple access in the synchronization channel message The frequency field OFDM FR FREQ of the frequency field CDMA FREQ and the code division multiple access extension is the frequency of the normal carrier frequency. Preferably, the pseudo carrier frequency configuration module, the setting module, the air interface frequency point configuration module, and the normal carrier frequency configuration module are disposed in a background network management system. Preferably, the replication module, the transmitting module, the signal configuration module, and the synchronization channel configuration module are disposed on a base station. Embodiment 3 This embodiment combines Embodiment 1, Embodiment 2 and preferred modes thereof. In this embodiment, a preferred implementation manner for implementing pseudo pilot in an actual system is provided. FIG. 6 is based on the present invention. A schematic diagram of a pseudo pilot implementation of an embodiment. FIG. 7 is a flow diagram of a pseudo pilot implementation in accordance with a preferred embodiment of the present invention, which is described below in conjunction with FIGS. 6 and 7. Step S702, two carrier frequencies are configured in the sector of the background network management system. As shown in FIG. 6, the first one is a normal carrier frequency sectorO, and the second one is a pseudo pilot carrier frequency sectorl. Configured at the carrier frequency of the pseudo pilot The number of pseudo pilots required and the air interface frequency of each pseudo pilot. The frequency of the first normal carrier frequency is fD, and the second pseudo pilot carrier is configured with N-channel pseudo pilots, and the radio frequency frequencies of each pseudo pilot are fl, f2, ... fN. Step S704, configuring a pilot channel and a synchronization channel under the pseudo pilot carrier frequency, and synchronizing the frequency point K of the message frequency field. The values of each parameter are shown in Table 1 below: Table 1 Synchronization channel message frequency point field parameter value reference table

Step S706: The base station fills in the CDMA_FREQ and EXT CDMA FREQ fields in the pseudo pilot synchronization channel message as the frequency of the normal carrier frequency. Step S708, the base station transmits a pseudo pilot signal to the signal copying module (for performing the function of the copy module in FIG. 5), and copies the number of the pseudo pilot signal and the radio frequency channel notification signal of each pseudo pilot signal. Module. Step S710, the signal replication module copies one channel of the pseudo pilot signal according to the configuration parameter, as shown in FIG. 6, copies the signal of the original sectorO into N shares, and sends the N pieces of pseudo pilot signals to different frequencies. On the RF channel of the point, it is finally sent to the air interface to generate pseudo pilot signals fl to fN. That is, the background network management system sends these parameters to the foreground of each base station. After receiving the parameters, the signal replication module of the foreground of the base station configures each carrier frequency according to the parameters, and copies the original signal of the pseudo pilot carrier frequency according to the relevant parameters of the pseudo pilot. And transmitting the original signal of the pseudo pilot and the copy channel to the RF channels of different frequency points respectively. With the preferred embodiment, multi-channel pseudo pilots are supported by one pseudo pilot carrier frequency, and the frequency of each pseudo pilot is different, but the content is the same. Sending to the RF channel of different frequency points ensures that the mobile station can receive the pseudo pilot signal at the required frequency. Since the signal content copied by the signal copying method is completely the same, after the mobile station searches for the pseudo pilot signal at the desired frequency point, it can go to the normal carrier frequency for standby according to the content of the pseudo pilot signal. According to the present invention, the frequency point field of the synchronization channel message of the pseudo pilot signal is filled in the frequency point information of the basic carrier frequency, and one pseudo pilot signal is copied and multiplexed according to the configuration requirement, and respectively sent to The radio frequency channel at the same frequency point is sent to the air interface, which solves the problem that the pseudo pilot signal in the related art completely depends on the number of supported baseband chips to support the use of the number of fans, thereby achieving a pseudo pilot carrier frequency support multipath pseudo. The pilot signal reduces the cost of the device used to implement the pseudo carrier frequency. Obviously, those skilled in the art should understand that the above modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device, such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein. The steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps are fabricated as a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software. The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the scope of the present invention are intended to be included within the scope of the present invention.

Claims

Claim

A method for implementing a pseudo pilot, comprising:

Configuring a pseudo pilot carrier frequency;

Setting the number of the pseudo pilots on the pseudo pilot carrier frequency according to the system requirements; configuring the air interface frequency points corresponding to the pseudo pilots, where the number of the air interface frequency points is equal to the number of the pseudo pilots Number

And replicating the signal of the pseudo pilot carrier frequency, wherein the number of copies is equal to the number of the pseudo pilots;

Transmitting the copied pseudo pilot carrier frequency signals to the air interface frequency points, respectively.

The method according to claim 1, wherein before the signal of the pseudo pilot carrier frequency is copied, the method further includes:

Configure a normal carrier frequency;

Configuring a signal of the pseudo pilot carrier frequency, where the signal includes a pilot signal and a synchronization signal;

The frequency field in the synchronization channel message configuring the signal of the pseudo pilot carrier frequency is the frequency field of the normal carrier frequency.

The method according to claim 2, wherein the frequency field in the synchronization channel message of the signal configuring the pseudo pilot carrier frequency is the frequency field of the normal carrier frequency, including:

The frequency division field EXT CDMA FREQ of the code division multiple access frequency field CDMA_FREQ and the code division multiple access extension in the synchronization channel message is configured as the frequency of the normal carrier frequency.

4. A pseudo pilot implementation apparatus, comprising:

a pseudo carrier frequency configuration module, configured to configure a pseudo pilot carrier frequency;

Setting a module, configured to set a number of pseudo pilots on the pseudo pilot carrier frequency according to system requirements;

The air interface frequency point configuration module is configured to configure an air interface frequency point corresponding to the pseudo pilot, where the number of the air interface frequency points is equal to the number of the pseudo pilots; a copying module, configured to: copy the signal of the pseudo pilot carrier frequency, where the number of copies is equal to the number of the pseudo pilots;

And a transmitting module, configured to separately transmit the copied pseudo pilot carrier frequency signals to the air interface frequency point.

5. The device according to claim 4, further comprising:

Ordinary carrier frequency configuration module, set to configure a normal carrier frequency;

a signal configuration module, configured to configure a signal of the pseudo pilot carrier frequency, where the signal includes a pilot signal and a synchronization signal;

The synchronization channel configuration module, the frequency field in the synchronization channel message set to the signal configuring the pseudo pilot carrier frequency is the frequency field of the normal carrier frequency.

6. The apparatus according to claim 5, wherein the synchronization channel configuration module is configured to configure a code division multiple access frequency field CDMA FREQ and a code division multiple access extended frequency field EXT CDMA FREQ in the synchronization channel message as described The frequency of the ordinary carrier frequency.

The device according to claim 5, wherein the pseudo carrier frequency configuration module, the setting module, the air interface frequency point configuration module, and the normal carrier frequency configuration module are disposed in a background network management system.

8. The apparatus according to claim 5, wherein the copying module, the transmitting module, the signal configuration module, and the synchronization channel configuration module are disposed on a base station.