CN101179839A - Isomerized network switch method, system, terminal and network - Google Patents
Isomerized network switch method, system, terminal and network Download PDFInfo
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- CN101179839A CN101179839A CNA2006101460614A CN200610146061A CN101179839A CN 101179839 A CN101179839 A CN 101179839A CN A2006101460614 A CNA2006101460614 A CN A2006101460614A CN 200610146061 A CN200610146061 A CN 200610146061A CN 101179839 A CN101179839 A CN 101179839A
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Abstract
The invention is related to the field of radio communication and discloses an isomeric network switching method, system, terminal and network. When conducting a switching of the isomeric network, the invention is able to avoid a reverse access competition between the terminals, thereby improving the success rate of network access and reducing the service interruption time caused by the switching. In the invention, when the isomeric network switching is conducted at the terminal, the first message of the terminal that is used to negotiate with the target network for establishing wireless service connections is sent to the target network via the source network. The target network reserves resources for the terminal according to the first message received and send back the message of the reserved resources to the terminal through the source network. The terminal establishes wireless service connections according to the reserved resources and accesses to the target network.
Description
Technical field
The present invention relates to wireless communication field, particularly the heterogeneous network handoff technique.
Background technology
Along with the fast development of the communication technology and popularize, mobile phone and the data service that provides thereof have changed people's live and work more and more.Simultaneously, comply with the demand in market, operators develop the various communication technology according to user's different demands, the present situation that forms the multiple communication technology and deposit.Often can see that multiple mobile cellular technology is present in areal simultaneously, also have the situation of same cellular technology simultaneously by the different operators operation.The user can roam between various communication systems and switch and network selecting, as shown in Figure 1 according to the type of service of heterogeneous networks and the difference on the quality of service.
Switching is that mobile communication system is distinctive, also is one of most important function.The demand of switching detects, believes resource allocation and optimization to device signal, and professional continuity has proposed very high requirement, and has directly influenced the performance of system.
The user is switched between networks of different type and is called isomery and switches, and isomery switches with traditional switching different, and current various wireless communication systems have proposed solution separately in order to solve the isomery switching problem with other system.Such as, the standardized partnership projects of 3G (Third Generation) Moblie (the 3rd Generation Partnership Project, abbreviation " 3GPP ") universal mobile telecommunications system (Universal Mobile Telecommunications System has been proposed, be called for short " UMTS ") and WLAN (wireless local area network) (Wireless Local Area Network, abbreviation " WLAN "), the switching between the global system for mobile communications (Global System for mobile Communication is called for short " GSM "); 3GPP has also proposed the switching between code division multiple access (Code Division Multiple Access is called for short " CDMA ") 20001x and the CDMA EVDO.
But these changing methods all are to solve a part of isomery switching problem relevant with present networks.Solve the user at international institute of electrical and electronic engineers (Institute of Electrical andElectronics Engineers for unified, be called for short " IEEE ") 802.11, the roaming switching problem between the communication systems such as IEEE 802.15, IEEE 802.16,3GPP, 3GPP2, IEEE 802 wireless working groups have set up IEEE 802.21 working groups, be responsible for to work out public switching framework and are used for wired and wireless IEEE 802 standards (as IEEE 802.3/11/16/15) and 3GPP, 3GPP2 system.Standard is carried out requirement and the corresponding handover mechanism that software and hardware switches at (just between heterogeneous network) between the different system.
Briefly, IEEE802.21 shields by physical layer and medium Access Layer to multiple Access Network, has collected physical layer and medium Access Layer relevant information, provides unified interface to the upper strata, makes the difference of different Access Networks fully transparent to the upper strata.Realize this function entity we be called independent medium switching functional entity (Media Independent Handover Function, be called for short " MIHF ").
MIHF can be used for network side and end side.Here said terminal must be a multimode, and can insert multiple radio open simultaneously, like this could the irrelevant switching of support media (Media IndependentHandover is called for short " MIH ") function.
One shows the flow process that terminal is carried out the sub-district switching in the prior art, as shown in Figure 2.
In step 201, GSM/ base station controller (Base Station Controller, be called for short " BSC ") send handoff request message (HANDOVER REQUIRED) to GSM/ mobile services switching centre (Mobile services Switching Center is called for short " MSC ").
Then enter step 202, GSM/MSC sends MAP/E to core net (Core Net is called for short " CN ") and prepares to switch message (PREPARE HANDOVER).
Then enter step 203, CN sends migration request message (RELOCATION REQUEST) to target radio network controller (Radio NetworkController is called for short " RNC ").
Then enter step 204, Target RNC is to CN remigration request-reply message (RELOCATION REQUEST ACKNOWLEDGE).
Then enter step 205, CN sends MAP/E to GSM/MSC and prepares switching response message (PREPARE HANDOVER RESPONSE).
Then enter step 206, GSM/MSC sends switching command message (HANDOVER COMMAND) to GSM/BSC.
Then enter step 207, GSM/BSC sends switching command message (HANDOVERCOMMAND) to terminal, and indicating terminal inserts from the new sub-district of UMTS Target RNC.
Then enter step 208, Target RNC detects terminal, sends migration detect-message (RELOCATION DETECT) to the CN node.
Then enter step 209, set up Radio Resource control (RadioResource Control between terminal and the Target RNC, be called for short " RRC ") connect, after distributing necessary Radio Resource, transmit into universal mobile telecommunications system grounding wireless access network (UMTS Terrestrial Radio AccessNetwork is called for short " UTRAN ") handoff completion message (HANDOVER TO UTRANCOMPLETE) to Target RNC.
Then enter step 210, Target RNC sends wireless access network applying portion (RadioAccess Network Application Part is called for short " RANAP ") migration to CN and finishes message (RELOCATION COMPLETE).
Then enter step 211, CN sends MAP/E to GSM/MSC and sends end signaling request message (SEND END SIGNAL REQUEST).
Then enter step 212, GSM/MSC sends clear command message (CLEARCOMMAND) to GSM/BSC.
Then enter step 213, GSM/BSC sends to remove to GSM/MSC and finishes message (CLEARCOMPLETE).
Then enter step 214, GSM/MSC sends MAP/E to CN and finishes signaling response message (SEND ENDSIGNAL RESPONSE).
Above switching flow is the main implementation that present wireless communication system isomery switches, and the subject matter of this implementation is that flexibility is not enough.If the network side of UMTS system need realize that isomery switches with a plurality of cordless communication networks, the UMTS system just need set up the corresponding interface and define corresponding message for each cordless communication network so.Switch and set up isomery with new cordless communication network if desired, the UMTS system needs to redefine corresponding interface and message again.
Therefore, we are necessary isomery handoff functionality module is peeled off out from concrete wireless communication network.Like this, be connected, also can not exert an influence the existing communication network even need set up the isomery switching with new cordless communication network.Only need be unified in the isomery handover module handles just passable.So just increased the flexibility of system extension greatly.Especially in end side, exist the isomery handover module of a plurality of access networks of unified management will make the information interaction of interdepartmental system become more clear flexible.
In addition, under the trend of current network flattening, we may directly connect between the base station of heterogeneous network, rather than connect by the core net of heterogeneous network.At this moment independent isomery handover module just can be placed on base station or core net part as required, perhaps all has the isomery handover module at two parts.Can improve the flexibility of system extension and network organization so greatly.
IEEE 802.21 working groups have carried out standard to the method that isomery switches on above basis, in the current isomery based on the IEEE802.21 standard switches, terminal is initiated the MIH switching to source network and is carried out request (MIH_Handover_Commit) when determining that carrying out isomery switches, the notification source network will carry out a MIH and switch, and indication prepares to switch objective network type in the past and access point media interviews control (Medium Access Control is called for short " MAC ") address.Source network is transmitted this request according to the objective network type and is given objective network.Mutual by source network and objective network can confirm whether objective network is permitted terminal and inserted.
Switch if source network and objective network are all accepted this MIH, will send MIH and switch execution response (MIH_Handover_Commit) to terminal.After terminal is received response, just can attempt inserting at objective network.
Before terminal and network initiation MIH handoff request, terminal should have been finished the detection to objective network.Terminal is indicated the detection of finishing objective network by link detecting (Link_Detected) primitive in the IEEE802.21 standard; For WCDMA and CDMA, terminal has correctly received the message of forward pilot signal and broadcast channel and has promptly represented the detection of having finished objective network; For 802.16 networks, terminal has received descending DL MAP and UL MAP message and has finished ranging process and promptly represented the detection of having finished objective network.After finishing above-mentioned processing, terminal just is in idle condition at these networks.
In the MIH handoff procedure, terminal inserts objective network by reverse contention requests, and the access procedure in WCDMA, CDMA and 802.16 is respectively:
WCDMA：
Terminal is initiated the RRC connection request at Reverse Access Channel, finish after RRC is connected with RNC, terminal is to the professional foundation of core network requests, and core net is initiated RAB to RNC and set up request, and RNC sends radio bearer foundation request to MC (media gateway controlling).Terminal is set up wireless channel, and link establishment is finished.
CDMA：
Terminal is initiated initial call message to BSC at Reverse Access Channel, and BSC sets up request to core network requests, and BSC sends out Extended Channel Assignment Message to terminal simultaneously, and terminal is finished with the link of base station according to this message indication and is connected, and link establishment is finished.
802.16：
Terminal parses the position of public initial ranging chance by receiving DL-MAP and the UL-MAP message that send the base station, sends RNG-REQ message in this transmission opportunity, and BS is a terminal distribution special ranging chance.After range finding was finished, terminal was initiated bandwidth request, and the terminal distribution bandwidth is given in the mode of scheduling in the base station, and link establishment is finished.
Be example with the WCDMA system to the switching flow of cdma system below, to being specifically described, as shown in Figure 3 based on the heterogeneous network switching flow that carries out according to current 802.21 agreements.
In step 301, terminal prepares to initiate the MIH switching, initiates the MIH initialization request to current service network WCDMA network, is with candidate target network type cdma system and 802.16 systems.
Then enter step 302, the WCDMA network is sent out the MIH handover preparation request to candidate target network 802.16 systems.
Then enter step 303,802.16 systems return to switch and prepare response, return the present networks situation.
Then enter step 304, the WCDMA network is sent out the MIH handover preparation request to candidate target network C DMA system.
Then enter step 305, cdma system returns to switch prepares response, returns the present networks situation.
Then enter step 306, the WCDMA network returns the switching initialization response to terminal.
Then enter step 307, terminal selects cdma system as objective network, sends MIH and switches the request of execution.
Then enter step 308, the WCDMA network is transmitted MIH to cdma network and is switched the request of execution, and carries out the MIH switching and prepare.
Then enter step 309, cdma network returns MIH and switches the execution response, accepts the MIH handoff request.
Then enter step 310, WCDMA returns MIH to terminal and switches the execution response, accepts the MIH handoff request.
Then enter step 311, terminal switches to cdma network after receiving that MIH switches the execution response, sends out initial call message by Reverse Access Channel, and the message that sends at Reverse Access Channel is emulative.
Then enter step 312, network sends Extended Channel Assignment Message to terminal, distributes physical resource for this connects simultaneously, is eating dishes without rice or wine to send forward signal to terminal.
Then enter step 313, terminal is according to the content of Extended Channel Assignment Message indication, successfully catch forward signal after, send the reverse traffic channel prefix to this cdma network, this cdma network is caught reverse signal, link establishment is finished.
In prior art two, the RRC connection request in the WCDMA system, the initial call message in the cdma system, the public range finding in 802.16 systems all is oppositely to issue network by the mode of competition by terminal.With regard to producing collision, cause this access failure like this, increase and insert required time because a plurality of terminals send this message simultaneously.And this moment, terminal broke away from source network, and as seen before terminal inserted objective network, the professional of this terminal temporarily interrupted, and therefore the competition that oppositely inserts is fierce more, and turn-on time is long more, and then Ye Wu break period is long more.
Even it is not fierce to compete, terminal sends the request of inserting (comprising RRC connection request, initial call message, DL-MAP and UL-MAP message etc.) first and promptly obtains the network response, also has long delay.
According to the analysis of 25.815 pairs of call delays of 3GPP TR, initiate oppositely to insert to take 110 milliseconds of times, in addition, after the access request of receiving terminal, objective network carries out necessary resource allocation for this connection, can further increase HO-break duration.According to the analysis of 25.815 pairs of call delays of 3GPP TR, need 200 milliseconds in base station assigns and set up Radio Resource.
Can see based on existing 802.21 standards, in 3GPP, carry out isomery and switch, only oppositely insert and allocation of radio resources aspect will cause 300 milliseconds delay, 300 milliseconds delay will make a lot of service disconnection.
In addition, in this handoff procedure, if terminal does not provide detailed terminal ability information and traffic type information to objective network, objective network may be difficult to dispose adequate resources for this connects exactly, comprises power resource, modulation resource physically, time interval resource, bandwidth resources, sign indicating number resource, QoS or the like.
Simultaneously, some resource of network side configuration needs notice terminal in time, otherwise these reserved resource are just meaningless.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of heterogeneous network switch method and system thereof, makes when carrying out the heterogeneous network switching, can avoid terminal to carry out reverse access contention, improve and insert success rate, and reduce the service outage duration that switching causes.
For achieving the above object, the invention provides a kind of heterogeneous network switch method, comprise following steps:
Terminal is being carried out heterogeneous network when switching, and by source network the first information of this terminal is sent to objective network, and the wireless traffic that this first information is used for consulting to set up with objective network this terminal is connected;
Objective network is this terminal reserved resource according to the first information that receives, and by source network the information of reserved resource is returned to this terminal;
Terminal is set up wireless traffic according to this reserved resource and is connected, and inserts objective network.
The present invention also provides a kind of heterogeneous network switched system, comprises source network, objective network and terminal, and terminal also comprises:
Carrying out heterogeneous network when switching, by source network the first information of this terminal is being sent to first transmitting element of objective network, the wireless traffic that this first information is used for consulting to set up with objective network this terminal is connected;
After the reserved resource information of receiving objective network from source network, set up wireless traffic according to this reserved resource and connect, insert the unit of objective network;
Source network also comprises:
When receiving the first information of self terminal, this first information is transmitted to first retransmission unit of objective network;
When the reserved resource information of receiving from objective network, the information of this reserved resource is transmitted to second retransmission unit of terminal;
Objective network also comprises:
After receiving the first information of terminal, be the unit of terminal reserved resource according to this first information from source network;
Reserved resource information is returned to second transmitting element of terminal by source network.
The present invention also provides a kind of terminal, comprises
Carrying out heterogeneous network when switching, by source network the first information of this terminal is being sent to the transmitting element of objective network, the wireless traffic that this first information is used for consulting to set up with objective network this terminal is connected;
After the reserved resource information of receiving objective network from source network, set up wireless traffic according to this reserved resource and connect, insert the unit of objective network.
The present invention also provides a kind of cordless communication network, comprises:
When present networks switches to objective network, receive the first information of self terminal in terminal, and the first information is transmitted to first retransmission unit of objective network, this first information is used for terminal and is connected with the wireless traffic that this terminal is set up in the objective network negotiation;
When the reserved resource information of receiving from objective network, the information of reserved resource is transmitted to second retransmission unit of terminal;
When source network switches to present networks, from the first information of source network receiving terminal, and is the unit of terminal reserved resource according to this first information in terminal;
Reserved resource information is returned to the transmitting element of terminal by source network.
By relatively finding, the main distinction of technical scheme of the present invention and prior art is, terminal is being carried out heterogeneous network when switching, and by source network this terminal is used for consulting to set up the first information that wireless traffic is connected (comprising the ability information of terminal and type of service etc.) with objective network and sends to objective network; Objective network is the terminal reserved resource according to the ability information and the type of service that receive, and by source network the information of reserved resource is returned to terminal; Terminal is set up wireless traffic according to this reserved resource and is connected, and inserts objective network.Send terminal ability information and type of service by source network to objective network because be, with respect to the prior art of transmitting this information by reverse competitive way, the present invention can not take place to send information simultaneously because of a plurality of terminals, the situation that causes reverse access contention and cause message transmission to be failed, reduce the possibility of terminal retransmission information, accelerated the switch speed of terminal.And, send the relevant information of accessing terminal to network by source network, make terminal when sending this information to objective network, and during the objective network reserved resource, this terminal can also continue to use former business in source network, need not sky etc., so reduced the possibility of service disconnection and the time of interruption in the terminal switching process.
Terminal can switch be carried out request or the request of media-independent switching initialization by media-independent the first information of terminal is transferred to source network; Source network can switch the execution response by media-independent, the response of media-independent switching initialization returns to terminal with reserved resource information; Source network can switch the request of execution by media-independent, the media-independent handover preparation request is transmitted to objective network with the first information of terminal; Objective network can switch the execution response by media-independent, media-independent switches the preparation response reserved resource information is transmitted to source network, and whole process need not to increase newly signaling, changes under the less situation at existing switching flow, realizes purpose of the present invention.
Description of drawings
Fig. 1 carries out the network diagram that isomery switches in the prior art;
Fig. 2 be in the prior art 3GPP definition switch to the flow chart of UMTS from GSM;
Fig. 3 is the method flow diagram of the terminal heterogeneous switching of IEEE802.21 draft definition in the prior art;
The device schematic diagram of Fig. 4 heterogeneous network switch method according to the present invention;
Fig. 5 is the heterogeneous network switch method flow chart according to first embodiment of the invention;
Fig. 6 is heterogeneous network switched system and the structure drawing of device according to third embodiment of the invention.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with accompanying drawing.
In the present invention, terminal is when carrying out the heterogeneous network switching, not by the reverse first information of the direct transmission terminal of mode of competition (this first information is used for terminal and is connected with the wireless traffic that this terminal is set up in the objective network negotiation), but the first information of this terminal is sent to objective network by source network, avoid in access procedure, causing conflict, accelerate access speed; Objective network is the terminal reserved resource according to the first information that receives, and by source network reserved resource information is returned to terminal; Terminal is set up wireless traffic according to this reserved resource and is connected, and inserts objective network.
As shown in Figure 4, the terminal in each execution mode of the present invention comprises the link layer interface (as 3GPP and 3GPP2 interface) of handling multiple access technology, general isomery handover module and multiple isomery switch application module (as SIP and MIP).Network side comprises the access network (as 3GPP network and 3GPP2 network) of at least two different structures, each network comprises corresponding access network device (as 3GPP and 3GPP2 interface), general isomery handover module (can be included in the concrete Access Network, also can be on Access Network), the shared isomery switch application module of each network (as SIP and MIP).
Below first embodiment of the invention is described, first execution mode relates to heterogeneous network switch method, in the present embodiment, source network and objective network are by supporting the entity of general isomery handoff protocol, as MIHF, send and receiving ability information and business information and reserved resource information.The current service network (source network) of terminal is the WCDMA network, and this terminal wishes to switch to the network of cdma network or agreement 802.16 definition from current network, and concrete handoff procedure as shown in Figure 5.
In step 501, terminal prepares to initiate the heterogeneous network switching, initiates the heterogeneous network initialization request to current service network (being source network) WCDMA network, carries the candidate target network type in request: the network of cdma network and agreement 802.16 definition.
Then enter step 502, after the WCDMA network was received the initialization request of this terminal, according to candidate target network type wherein, to one of them candidate target network, agreement 802.16 define grids sent the heterogeneous network handover preparation request.
Then enter step 503, after agreement 802.16 define grids are received heterogeneous network handover preparation request from the WCDMA network,, return to switch and prepare response, indication present networks situation in response according to the situation of present networks.
Then enter step 504, the WCDMA network then sends the heterogeneous network handover preparation request to second candidate target network C DMA network.
Then enter step 505, after cdma network is received this heterogeneous network handover preparation request,, return to switch and prepare response, indication present networks situation in response equally according to the situation of present networks.
Then enter step 506, response is prepared in the switching that network based each candidate network of WCDMA is returned, and returns switching initialization response, the candidate network that indicating terminal can switch to terminal.
Then enter step 507, terminal is selected according to the switching initialization response that the WCDMA network returns, determine the objective network of cdma network as this switching, send heterogeneous network to the WCDMA network and switch the request of execution, in this switching execution request, carry this terminal and be used for consulting to set up the first information (NewLinkMNMessage) that wireless traffic is connected with objective network.In order to carry NewLinkMNMessage information, need carry out request to existing switching expands, in the MIH_Handover_Commit.Request of IEEE802.21 definition (promptly switching the request of execution), increase the NewLinkMNMessage information of terminal, as follows:
MIH_Handover_Commit.Request(
SourceIdentifier，
DestinationIdentifier，
CurrentLinkIdentifier，
NewLinkIdentifier，
MACNewPoA，
OldLinkAction，
NewLinkMNMessage
)
At least the ability information and the type of service that comprise terminal in the NewLinkMNMessage information.If there is different quality of service (Quality of Service is called for short " QoS ") requirement in the business that terminal is used, then also comprise the QoS of the current use of this terminal in this NewLinkMNMessage information; If the service needed that this terminal is used is carried out authentication, then in NewLinkMNMessage information, also comprise the authentication information of this terminal.This NewLinkMNMessage information is including but not limited to ability information, type of service, QoS information, the authentication information of terminal.Send terminal NewLinkMNMessage information by source network (WCDMA network) to objective network (cdma network) because be, with respect to the prior art of transmitting this information by reverse competitive way, present embodiment can not take place to send information simultaneously because of a plurality of terminals, the situation that causes reverse access contention and cause message transmission to be failed, reduce the possibility of terminal retransmission information, accelerated the switch speed of terminal.And, send the relevant information of accessing terminal to network by source network, make terminal when sending this information to objective network, and during the objective network reserved resource, this terminal can also continue to use former business in source network, need not sky etc., so reduced the possibility of service disconnection and the time of interruption in the terminal switching process.
NewLinkMNMessage information is associated with objective network, that is to say, the content that NewLinkMNMessage information specifically comprises changes according to the objective network of terminal is different, when being the UMTS network as objective network, NewLinkMNMessage information can comprise all or part of information in " RRC Connection request " message among the UMTS; When objective network was CDMA20001x, NewLinkMNMessage information can comprise all or part of information in " Origination Message " message among the CDMA20001x; When objective network was the network of agreement 802.16 definition, NewLinkMNMessage information can comprise all or part of information of " MOB MSHO-REQ " message of agreement 802.16 definition.Except comprising the information in the above message, NewLinkMNMessage can also comprise relevant authentication information.
In the present embodiment, the NewLinkMNMessage information in the request switch carried out of being carried at comprises the full detail in source network " Origination Message " message of CDMA agreement C.S0005 regulation, and authentication information.
Then enter step 508, the WCDMA network is transmitted this heterogeneous network to cdma network and is switched the request of execution, and carries out the heterogeneous network switching and prepare.
Then enter step 509, after cdma network receives that request is carried out in this switching, according to NewLinkMNMessage information wherein, be equivalent to the information (mainly comprising terminal ability information, type of service and operation quality requirement) that " Origination Message " message comprises in the prior art and be this terminal reserved resource.If also comprise authentication information in this NewLinkMNMessage information, then cdma network at first carries out authentication according to this authentication information to this terminal, if by authentication, then be the terminal reserved resource, otherwise do not carry out resource reservation.
Behind reserved resource, cdma network returns heterogeneous network to the WCDMA network and switches the execution response, carries out in the response in this switching to comprise resource obligate information (NewLinkNetworkMessage information).Equally, need expand switching to carry out to respond, in the MIH_Handover_Commit.Response of IEEE802.21 definition (promptly switch and carry out response) increase NewLinkNetworkMessage information, as follows:
MIH_Handover_Commit.Response(
SourceIdentifier，
DestinationIdentifier，
CurrentLinkIdentifier，
OldLinkAction，
NewLinkNetworkMessage
)
NewLinkNetworkMessage information comprises the information of objective network for this terminal reserved resource at least, as inserting configuration information, physical channel resources, data map multiplexed format information etc.The content that NewLinkNetworkMessage specifically comprises changes according to the objective network of terminal is different.When being the UMTS network as objective network, NewLinkNetworkMessage information can comprise all or part of information in " RRC Connection Setup " message among the UMTS; When objective network was CDMA20001x, NewLinkNetworkMessage information can comprise all or part of information in " Extended Channel Assignment Message " message among the CDMA20001x; When objective network was the network of agreement 802.16 definition, NewLinkNetworkMessage information can comprise all or part of information in 802.16 " MOB_MSHO-RSP " message that define.In addition, NewLinkNetworkMessage information can also comprise relevant authentication information.
In the present embodiment, be carried at the full detail in " Extended Channel Assignment " message that the NewLinkNetworkMessage information of switch carrying out in the response comprises CDMA agreement C.S0005 regulation, and authentication information.In addition, cdma network is eating dishes without rice or wine to send forward signal to terminal.
Then enter step 510, WCDMA transmits this heterogeneous network to terminal and switches the execution response.
Then enter step 511, after terminal receives this heterogeneous network handoff response, switch the NewLinkNetworkMessage information that comprises in the response of carrying out according to heterogeneous network, be equivalent to all or part of information (mainly being reserved resource information) that " Extended Channel Assignment Message " message comprises in the prior art, directly remove to catch forward signal to cdma network, and transmission reverse traffic channel prefix signal, wireless traffic connection foundation was finished after cdma network was successfully caught this reverse signal, and terminal can insert cdma network.If also comprise authentication information in the NewLinkNetworkMessage information, then terminal at first determines according to this authentication information whether this terminal has the right to receive this business in cdma network, receive if having the right, then catch go-ahead signal at cdma network, otherwise handoff failure.
Second embodiment of the invention relates to heterogeneous network switch method, roughly the same with first execution mode, its difference only is, in the first embodiment, NewLinkMNMessage information is carried to switch in the request of execution and sends to objective network, after objective network carries out resource reservation according to this information, by switching the NewLinkNetworkMessage information of returning that responds of carrying out; And in the present embodiment, terminal (comprises terminal ability information by the switching initialization request with NewLinkMNMessage information, type of service, operation quality requirement, authentication information etc.) send to source network, source network is transmitted to objective network by handover preparation request with this NewLinkMNMessage information, after objective network carries out resource reservation according to this information, NewLinkNetworkMessage information (mainly comprising resource obligate information) is carried at switching prepares to turn back to source network in the response, source network is transmitted to terminal by the switching initialization response with NewLinkNetworkMessage information.
Correspondingly, need expand switching initialization request, handover preparation request, switching preparation response, switching initialization response.In the MIH_Handover_Initiate.request of IEEE802.21 (being the switching initialization request) and MIH_Handover_Prepare.request (being handover preparation request), increase NewLinkMNMessage information, as follows:
MIH_Handover_Initiate.Request(
SourceIdentifier，
DestinationIdentifier，
CurrentLinkIdentifier，
SuggestedNewLinkList，
SuggestedNewPoAList，
HandoverMode，
OldLinkAction，
QueryResourceList，
QueryResourceFlag，
NewLinkMNMessage
)
MIH_Handover_Prepare.request(
SourceIdentifier，
DestinationIdentifier，
QueryResourceList，
NewLinkMNMessage
)
In the MIH_Handover_Initiate.Response of IEEE802.21 (being the switching initialization response) and MIH_Handover_Prepare.response (promptly switch and prepare response), increase NewLinkNetworkMessage information, as follows:
MIH_Handover_Prepare.response(
SourceIdentifier，
DestinationIdentifier，
Resource?Status，
AvailableResourceList，
NewLin?kNetworkMessage
)
MIH_Handover_Initiate.response(
SourceIdentifier，
DestinationIdentifier，
CurrentLinkIdentifier，
HandoverAck，
PreferredLinkList，
PreferedPoAList，
AbortReason，
AvailableResourceList，
QueryResourceList，
NewLin?kNetworkMessage
)
Third embodiment of the invention relates to the heterogeneous network switched system, as shown in Figure 6, comprise source network, objective network and terminal, terminal also comprises: first transmitting element, be used for when carrying out the heterogeneous network switching, by source network the first information of this terminal is sent to objective network, the wireless traffic that this first information is used for consulting to set up with objective network this terminal is connected; Access unit is used for after the reserved resource information of receiving objective network from source network, sets up wireless traffic according to this reserved resource and connects, and inserts objective network.Source network also comprises: first retransmission unit is used for when receiving the first information of self terminal the first information being transmitted to objective network; Second retransmission unit is used for when the reserved resource information of receiving from objective network, and the information of reserved resource is transmitted to terminal.Objective network also comprises: the resource reservation unit, be used for after receiving the first information of terminal from source network, and be the terminal reserved resource according to this first information; Second transmitting element is used for by source network reserved resource information being returned to terminal.Send the terminal first information by source network to objective network because be, with respect to the prior art of transmitting this information by reverse competitive way, present embodiment can not take place to send information simultaneously because of a plurality of terminals, the situation that causes reverse access contention and cause message transmission to be failed, reduce the possibility of terminal retransmission information, accelerated the switch speed of terminal.And, send the relevant information of accessing terminal to network by source network, make terminal when sending this information to objective network, and during the objective network reserved resource, this terminal can also continue to use former business in source network, need not sky etc., so reduced the possibility of service disconnection and the time of interruption in the terminal switching process.Wherein, first retransmission unit, second retransmission unit and second transmitting element are the entities of supporting general isomery handoff protocol.This first information comprises the ability information and the type of service of terminal, also comprises operation quality requirement and/or authentication information alternatively.
First transmitting element is by the first information of one of following message transmission terminal: media-independent switches the request of execution, the request of media-independent switching initialization; First retransmission unit is by the first information of one of following message transmission terminal: media-independent switches the request of execution, media-independent handover preparation request; Second retransmission unit is by the reserved resource information of one of following message transmission objectives network: media-independent switches to be carried out response, media-independent and switches and prepare response; Second transmitting element is by the reserved resource information of one of following message transmission objectives network: media-independent switches carries out response, the response of media-independent switching initialization.
In addition, objective network also comprises the authentication unit, if comprise authentication information in the first information that this first transmitting element sends, then objective network is by the authentication unit, according to the authentication information that receives terminal is carried out authentication, when the authentication, it is the terminal reserved resource according to the ability information of terminal and type of service and/or operation quality requirement that indexed resource is reserved the unit.If this first information does not comprise authentication information, then the resource reservation unit is the terminal reserved resource according to the ability information of terminal and type of service and/or operation quality requirement directly.
In the present embodiment, second transmitting element can also send authentication information to terminal by source network when sending reserved resource information; The authentication confirmation unit of terminal determines according to the authentication information that receives whether this terminal has the right in the business of objective network reception current type, if have the right, then indicate access unit to set up wireless traffic and connect, insert objective network according to the reserved resource of appointment.
Though pass through with reference to some of the preferred embodiment of the invention, the present invention is illustrated and describes, but those of ordinary skill in the art should be understood that and can do various changes to it in the form and details, and without departing from the spirit and scope of the present invention.
Claims (20)
1. a heterogeneous network switch method is characterized in that, comprises following steps:
Terminal is being carried out heterogeneous network when switching, and by source network the first information of this terminal is sent to objective network, and the wireless traffic that this first information is used for consulting to set up with objective network this terminal is connected;
Described objective network is described terminal reserved resource according to the first information that receives, and by described source network the information of reserved resource is returned to described terminal;
Described terminal is set up described wireless traffic according to this reserved resource and is connected, and inserts described objective network.
2. heterogeneous network switch method according to claim 1 is characterized in that described terminal is carried the described first information by one of following message, and the described first information is sent to described source network:
Media-independent switches the request of execution, the request of media-independent switching initialization;
Described source network carries described reserved resource information by one of following message, and described reserved resource information is sent to described terminal:
Media-independent switches carries out response, the response of media-independent switching initialization.
3. heterogeneous network switch method according to claim 1 is characterized in that described source network carries the first information of described terminal by one of following message, and the described first information is sent to described objective network:
Media-independent switches the request of execution, media-independent handover preparation request;
Described objective network sends to described source network by carry described reserved resource information in one of following message with described reserved resource information:
Media-independent switches carries out response, media-independent switching preparation response.
4. heterogeneous network switch method according to claim 1 is characterized in that, the described first information comprises the ability information and the type of service of terminal, also comprises operation quality requirement and/or authentication information alternatively;
If the described first information comprises described authentication information, then described objective network carries out authentication according to the authentication information that receives to described terminal, when the authentication, be described terminal reserved resource according to the ability information of described terminal and type of service and/or operation quality requirement; Otherwise terminal ability information that the direct basis of described objective network receives and type of service and/or operation quality requirement are described terminal reserved resource.
5. heterogeneous network switch method according to claim 1 is characterized in that, described reserved resource information is one of following information or its combination in any:
Insert configuration information, physical channel resources, data map multiplexed format information.
6. according to each described heterogeneous network switch method in the claim 1 to 5, it is characterized in that described source network and described objective network send and/or receive the described first information and/or described reserved resource information by the entity of supporting general isomery handoff protocol.
7. according to each described heterogeneous network switch method in the claim 1 to 5, it is characterized in that when sending described reserved resource information, described objective network also sends authentication information by source network to described terminal;
Described terminal is determined this terminal whether have the right to receive at described objective network business of described type according to the authentication information that receives.
8. according to each described heterogeneous network switch method in the claim 1 to 5, it is characterized in that the described first information and reserved resource information are associated with objective network;
When described objective network is universal mobile telecommunications system UMTS network, the first information of described terminal is all or part of information in " RRC Connection Request " message, and described reserved resource information is all or part of information in " RRC Connection Setup " message; Or
When described objective network is code division multiple access CDMA20001x network, the first information of described terminal is all or part of information in " Origination Message " message, and described reserved resource information is all or part of information in " Extended Channel Assignment Message " message; Or
When described objective network was the network of agreement 802.16 definition, the first information of described terminal was all or part of information in " MOB_MSHO-REQ message ", and described reserved resource information is all or part of information in " MOB_MSHO-RSP message ".
9. a heterogeneous network switched system comprises source network, objective network and terminal, it is characterized in that, described terminal also comprises:
First transmitting element is used for carrying out heterogeneous network when switching, and by source network the first information of this terminal is sent to objective network, and the wireless traffic that this first information is used for consulting to set up with objective network this terminal is connected;
Access unit is used for after the reserved resource information of receiving objective network from source network, sets up described wireless traffic according to this reserved resource and connects, and inserts described objective network;
Described source network also comprises:
First retransmission unit is used for when receiving the first information of self terminal the described first information being transmitted to described objective network;
Second retransmission unit is used for when the reserved resource information of receiving from objective network, and the information of described reserved resource is transmitted to described terminal;
Described objective network also comprises:
The resource reservation unit is used for after receiving the described first information from described source network, is described terminal reserved resource according to this first information;
Second transmitting element is used for by described source network described reserved resource information being returned to described terminal.
10. heterogeneous network switched system according to claim 9 is characterized in that, described first transmitting element transmits the first information of described terminal by one of following message: media-independent switches the request of execution, the request of media-independent switching initialization;
Described first retransmission unit transmits the first information of described terminal by one of following message: media-independent switches the request of execution, media-independent handover preparation request;
Described second retransmission unit transmits the reserved resource information of described objective network by one of following message: media-independent switches carries out response, media-independent switching preparation response;
Described second transmitting element transmits the reserved resource information of described objective network by one of following message: media-independent switches carries out response, the response of media-independent switching initialization.
11. heterogeneous network switch method according to claim 9 is characterized in that, described first retransmission unit, second retransmission unit and second transmitting element are the entities of supporting general isomery handoff protocol.
12. heterogeneous network switched system according to claim 10 is characterized in that, the described first information comprises the ability information and the type of service of terminal, also comprises operation quality requirement and/or authentication information alternatively;
Described resource reservation unit also is used for when the described first information comprises authentication information, according to the authentication information that receives described terminal is carried out authentication, if by authentication, be described terminal reserved resource then according to the ability information of described terminal and type of service and/or operation quality requirement; When the described first information did not comprise authentication information, terminal ability information that direct basis receives and type of service and/or operation quality requirement were described terminal reserved resource.
13. heterogeneous network switched system according to claim 10 is characterized in that, described objective network also comprises: when sending described reserved resource information, send the unit of authentication information to described terminal by source network;
Described terminal also comprises: determine this terminal whether have the right to receive at described objective network unit of the business of described type according to the authentication information that receives.
14. a terminal is characterized in that, comprises
Transmitting element is used for carrying out heterogeneous network when switching, and by source network the first information of this terminal is sent to objective network, and the wireless traffic that this first information is used for consulting to set up with objective network this terminal is connected;
Access unit is used for after the reserved resource information of receiving objective network from source network, sets up described wireless traffic according to this reserved resource and connects, and inserts described objective network.
15. terminal according to claim 14 is characterized in that, described transmitting element transmits the first information of described terminal by one of following message: media-independent switches the request of execution, the request of media-independent switching initialization.
16. terminal according to claim 14 is characterized in that, the described first information comprises the ability information and the type of service of terminal, also comprises operation quality requirement and/or authentication information alternatively.
17. a cordless communication network is characterized in that, comprises:
First retransmission unit, be used in terminal when present networks switches to objective network, receive the first information of self terminal, and the described first information is transmitted to described objective network, this first information is used for terminal and is connected with the wireless traffic that this terminal is set up in the objective network negotiation;
Second retransmission unit is used for when the reserved resource information of receiving from objective network, and the information of described reserved resource is transmitted to described terminal;
The resource reservation unit is used in terminal when source network switches to present networks, receives the first information of described terminal from described source network, and is described terminal reserved resource according to this first information;
Transmitting element is used for by described source network described reserved resource information being returned to described terminal.
18. cordless communication network according to claim 17 is characterized in that, described first retransmission unit transmits the first information of described terminal by one of following message: media-independent switches the request of execution, media-independent handover preparation request;
Described second retransmission unit transmits the reserved resource information of described objective network by one of following message: media-independent switches carries out response, media-independent switching preparation response;
Described transmitting element transmits the reserved resource information of described objective network by one of following message: media-independent switches carries out response, the response of media-independent switching initialization.
19. terminal according to claim 17 is characterized in that, the described first information comprises the ability information and the type of service of terminal, also comprises operation quality requirement and/or authentication information alternatively.
20. heterogeneous network switch method according to claim 17 is characterized in that, described first retransmission unit, second retransmission unit and transmitting element are the entities of supporting general isomery handoff protocol.
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