CN102084691B - Method and apparatus for group handover in wireless network - Google Patents
Method and apparatus for group handover in wireless network Download PDFInfo
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- CN102084691B CN102084691B CN200880130195.4A CN200880130195A CN102084691B CN 102084691 B CN102084691 B CN 102084691B CN 200880130195 A CN200880130195 A CN 200880130195A CN 102084691 B CN102084691 B CN 102084691B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/16—Performing reselection for specific purposes
- H04W36/165—Performing reselection for specific purposes for reducing network power consumption
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0009—Control or signalling for completing the hand-off for a plurality of users or terminals, e.g. group communication or moving wireless networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
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- H04W36/247—Reselection being triggered by specific parameters by using coverage extension
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Abstract
A method and apparatus for group handover in wireless network are provided. At least two mobile stations are formed a mobile group, when a request for handover from the mobile stations in the mobile group is received at the first time, the current access station in service begins to transmit the information about all the mobile stations in the mobile group in a batch mode to the object access station in handover preparing phase of the mobile station, after receiving the response of the object access station, the current access station in service transmits a handover response to the mobile station which sent the handover request firstly, when the other mobile stations in the mobile group execute handover, the current access station in service does not retransmit the information which has been transmitted in the handover preparing phase. The signal overhead during the group handover and the duration of the group handover have been reduced observably by applying the scheme, so the interrupt time in mobile station service is reduced, and the compatibility with the existing wireless network can be realized.
Description
Technical field
The present invention relates to wireless network, particularly organize the method and apparatus of the switching of mobile radio station for wireless network.
Background technology
At present, at wireless network particularly in the mobile network based on honeycomb, if mobile radio station MS (Mobile Station) Cong Yige community moves to contiguous community, this mobile radio station will be carried out a series of step, to ongoing calling or data transmission are transformed into contiguous target access station from the access station of current service, so-called switching that Here it is (handover/handoff).Conventionally, switch and managed by current serving BS SBS (Serving Base Station), and need mobile radio station and current service/carry out complicated signaling exchange between target access station, this has caused the latency issue that control signal expense (overhead) and business transmit.When carry out the associative operation of network reentry during handoff procedure time, such as re-authentication, re-authorization, range finding etc., business transmission may be interrupted.If exist frequently and switch in network, situation can be worse.Unfortunately, along with the development of wireless technology, have at least following several factor may make to switch occur more frequent.
First, the frequency of following radiotechnics will become higher, for example 3.5GHz, the high propagation loss characteristic of high-frequency signal will reduce radius of society and the quantity increase of base station greatly, and result is that mobile radio station has to carry out frequently and switch and pass through multiple compare little community in high-speed mobile process.In addition,, in following mobile network, relay station will be likely set and strengthen network throughput (throughput) extended coverage range.But the coverage of relay station is more much smaller than base station, it is more frequent that this makes to occur in switching between relay station or between relay station and base station.
The second, increasing people gets used to using mobile service, for example train or bus in the vehicles.In the time that the vehicles pass through the community of two vicinities in cellular network in moving process, the mobile radio station that is loaded in the vehicles has to carry out the switching from source access station to target access station.If there are many mobile radio stations that are loaded in the vehicles, the switching of carrying out all mobile radio stations will have a huge impact network performance.And, due to more and more faster (IMT-Advanced has required the high-speed mobile of following radiotechnics support up to 350,000 ms/h) of speed of the vehicles, thereby may within the very short cycle, generate a large amount of hand off signaling of multiple mobile radio stations, this will be very large burden to access station and backhaul (backhaul) network.This requires access station to have more powerful concurrent processing ability.
But, in existing wireless technology, at present also not to organizing the special solution of mobile problem.Traditional mobility solution is the switching of processing discretely and independently each mobile radio station, no matter whether they have identical motion track.Fig. 1 illustrates the processing procedure of traditional solution.MS1, MS2......MSn are the group mobile radio stations with identical moving characteristic, and for example, MS1, MS2......MSn are on the identical vehicles.Each mobile radio station in group mobile radio station is carried out handoff procedure independently.First, they monitor DL (Down Link, the down link) signal of contiguous BS, i.e. sweep signal in Fig. 1, selects for community.If meet predefined threshold value in MS1, MS1 sends handover request message to current serving BS, triggers the switching of MS1.Recommend/preferably target BS TBS (Target Base Station) list also will be included in this message.Based on the handover request of receiving, SBS start with recommendation list in potential TBS consult, and be a preferred TBS of MS1 selection.Once determine TBS, SBS sends handoff response to MS1, the information that identifies determined TBS is included in switching response message.Based on the response message receiving, MS1 sends and switches instruction to SBS, and then being connected of disconnection and SBS, and ranging process (comprising distance measurement request and ranging response step) between initiation and TBS.Subsequently, MS1 just enters network and reentries the stage, and wherein, the operations such as range finding, re-authentication, re-authorization will be performed in this stage.For this switching of moving other mobile radio stations in group, also will carry out in a similar manner.For all mobile radio stations, the time of the duration of signaling consumption and switching, particularly service disruption is all roughly the same.Therefore, this is not the best solution that mobile problem is organized in solution.
In addition,, in IEEE802.16j multi-hop relay task groups, Nokia and some other companies have proposed group and have switched thought.The each vehicles configuration MRS of this solution requirement (Mobile RelayStation, mobile-relay station), as shown in Figure 2.Due to backward (backward) compatible restriction, MRS is transparent for mobile radio station, and MRS processes switching as agency.As shown in Figure 2, the similar process of switching of MS in MRS execution and prior art, monitor the DL signal of contiguous BS the handover request (MOB MSHO-REQ) to SBS transmission mobile radio station, similarly, SBS sends handoff response to MRS after determining TBS, subsequently, MRS sends to switch and indicate and start range finding and the necessary operation of reentrying of other networks.In network re-entry procedure, each connection of the mobile radio station that is subordinated to MRS for MS1, MS2 etc. is distributed new concatenating indicator CID (Connection Identification) by TBS, and the corresponding relation between this new CID and former CID is sent to MRS.MRS will create the mapping relations of new CID and former CID for each connection of affiliated mobile radio station.Like this, be connected transmission group data by the CID mark by with new between MRS and TBS, and between MRS and group mobile radio station MS, still use being connected of former CID mark to carry out transfer of data, thereby make mobile radio station MS also may keep being connected with MRS in the handoff procedure of MRS.The great advantage of the method is to have omitted the process that group mobile radio station CID upgrades, if but think that guarantee group mobile radio station stays out of all the time handoff procedure in MRS moving process, need to distribute independently frequency spectrum resource for organizing the access of interior mobile radio station for MRS, to guarantee that MRS does not produce and disturbs with other base stations or relay station in moving process, this is to be difficult to realize in real network.In addition, this solution larger defect is the network that is only applicable to have mobile-relay station MRS.
In addition, Motorola Inc. has also proposed a kind of group of method of switching.The method needs base station or access station transmission group to be identified to all mobile radio stations that are attached to this group.In other words, group switching is not transparent for MS.Therefore,, for the independently switching of group switching and original each mobile radio station, MS must follow respectively two different handoff procedures.This has increased the complexity of agreement and system, be not one efficiently for the ambulant solution of wireless network.
From above-mentioned, in mobile environment, particularly for the group mobile radio station environment in rapid, how reducing handover overhead and accelerating handoff procedure is a problem demanding prompt solution.
Summary of the invention
The present invention aims to provide the method and apparatus switching for wireless network group, for addressing the above problem, realizes and reduces at least to a certain extent handover overhead, and accelerate handoff procedure.
The invention provides a kind of method that group for wireless network is switched, comprise step:
A. at least two mobile radio stations are formed to mobile group;
B. when receive first from the mobile radio station of described mobile group handover request time, in the handoff preparation phase of this mobile radio station, the relevant information that the access station of current service starts this to move all mobile radio stations of group sends to target access station with batch mode;
Receive after the response of target access station, the access station of current service sends handoff response to the mobile radio station that sends at first handover request, and this mobile radio station is carried out handover operation;
In the time that other mobile radio stations of described mobile group switch, the access station of current service no longer repeats to send the information that described handoff preparation phase has sent.
Preferably, determine described mobile group according to the motion track of mobile radio station and/or moving characteristic.
Preferably, the access station of current service, in described batch mode, separates processing by the relevant information of the mobile radio station that sends at first handover request with the relevant information of interior other mobile radio stations of mobile group.
Described relevant information be mobile radio station in the needed information of handoff preparation phase and/or mobile radio station needed information in handoff procedure.
Preferably, the information that target access station sends with batch mode according to current service access station, for the mobile radio station in mobile group pre-determines and switches relevant information.
Preferably, when other mobile radio stations of described mobile group switch, do not carry out ranging process, reuse the ranging information of the mobile radio station that sends at first handover request.
The device that the present invention also provides a kind of group for wireless network to switch, this device comprises:
Receiver module, is configured to receive mobile group of information;
Judge module, is configured to judge whether handover request is the handover request first from the mobile radio station of described mobile group;
Group switching controls module, being configured to control group switches, according to the judgement of judge module, if handover request is the handover request first from the mobile radio station of described mobile group, in the handoff preparation phase of this mobile radio station, the relevant information that starts this to move all mobile radio stations of group sends to target access station with batch mode; If not,, in the handoff procedure of this mobile radio station, no longer repeat to send the information that described handoff preparation phase has sent.
The device that the present invention also provides a kind of group for wireless network to switch, this device comprises:
Mobile group determination module, is configured to mobile radio station to form mobile group;
Judge module, is configured to judge whether handover request is the handover request first from the mobile radio station of described mobile group;
Group switching controls module, being configured to control group switches, according to the judgement of judge module, if handover request is the handover request first from the mobile radio station of described mobile group, in the handoff preparation phase of this mobile radio station, the relevant information that starts this to move all mobile radio stations of group sends to target access station with batch mode; If not,, in the handoff procedure of this mobile radio station, no longer repeat to send the information that described handoff preparation phase has sent.
The equipment that the present invention also provides a kind of group for wireless network to switch, for forming mobile radio station mobile group or for receiving the information of mobile group; For judging whether the handover request receiving is the handover request first from the mobile radio station of described mobile group; If be the handover request first from the mobile radio station of described mobile group for handover request, in the handoff preparation phase of this mobile radio station, the relevant information that starts this to move all mobile radio stations of group sends to target access station with batch mode; For if not,, in the handoff procedure of this mobile radio station, no longer repeat to send the information that described handoff preparation phase has sent.
The device that the present invention also provides a kind of group for wireless network to switch, this device comprises:
Receiver module, is configured to receive the relevant information that moves all mobile radio stations of organizing sending with batch mode;
Group handover information determination module, is configured to according to the information of receiver module reception, is that mobile radio station is determined the relevant information of switching in advance.
The equipment that the present invention also provides a kind of group for wireless network to switch, for receiving the relevant information of the mobile all mobile radio stations organized that send with batch mode; For the information receiving according to receiver module, in advance for mobile radio station is determined the relevant information of switching.
The equipment that the present invention also provides a kind of group for wireless network to switch, this equipment comprises:
Receiving system, for receiving the information relevant to switching from mobile radio station and other access devices;
Dispensing device, for sending to described mobile radio station and other access devices and switching relevant information;
It is characterized in that, also comprise the group switching device shifter as described in claim 7,8 or 10.
The computer program that the present invention also provides a kind of group for wireless network to switch, comprises that instruction is to carry out said method, device and equipment.
The present invention also provides a kind of storage medium, and on it, storage is for carrying out the instruction of said method, device and equipment.
The present invention also provides computer system, comprises processor on it, for carrying out above-mentioned computer program.
According to the solution of the present invention, because the access station of current service is sent to target access station by all mobile radio station relevant informations in mobile group with batch mode, instead of transmit respectively for each mobile radio station, thereby can reduce significantly the signaling consumption between current service access station and target access station as traditional changing method.And when in the time that target access station also transmits response message with batch mode to the access station of current service, signaling consumption will further be reduced.In addition, the access station of current service is only once consulted contiguous potential target access station, can be just all mobile radio station select target access stations in mobile group, switches thereby greatly shortened group the time spending.
For the mobile radio station in mobile group, except the mobile radio station of first initiation group switching, due to the information relevant to switching, as the link information, the re-authentication etc. that upgrade, before it switches, be transmitted to target access station, therefore switching the duration (break period) is reduced significantly.For example, taking IEEE802.16e as example, transmitting mobile radio station relevant information from SBS needs 20ms conventionally to the corresponding message that obtains TBS.In addition, when its range finding (ranging) information of reusing this and move in group the mobile radio station that first initiation group switches, while omitting range finding step, switch the lasting time, the especially time of service disconnection, further reduced.For example, in IEEE 802.16e network, when switching, ranging process may need 40-85ms.
In sum, compared with existing changing method, the expense of signal accelerate handoff procedure in the solution of the present invention minimizing group significantly handoff procedure, thus reduce significantly service outage duration, improve the service quality of wireless traffic.And, compared with the scheme of Nokia, the present invention does not need to arrange other extra network element devices, this not only provides cost savings, main is has realized and the good compatibility of existing network environment, can be applied to the wireless network with relay station, instead of only limit to have the hop relay network of MRS.Meanwhile, be transparent for mobile radio station, thereby without any need for the extra support function of mobile radio station.
By the detailed description and the accompanying drawings below, beneficial effect of the present invention, feature, advantage etc. will better be embodied.
In the present invention, unless expressly stated, group switching or group move and refer to one group of switching problem with the mobile radio station of similar motion track or feature.Unless expressly stated, group mobile radio station refers to that one group has similar motion track and the mobile radio station of moving characteristic, for example, and the mobile radio station in the same vehicles.Unless expressly stated, group is switched the handoff procedure that refers to all mobile radio stations in this group.
Brief description of the drawings
Fig. 1 shows the handoff procedure of MS in IEEE 802.16e;
Fig. 2 shows the handoff procedure of the MRS with attached MS;
Fig. 3 is shown schematically in one according to the example of organizing handoff procedure in IEEE 802.16 of the present invention;
Fig. 4 be shown schematically in one be arranged in SBS/SRS according to device example of the present invention;
Fig. 5 be shown schematically in one be arranged in TBS/TRS according to device example of the present invention.
Embodiment
The invention provides new handoff solution, thereby reduced signaling consumption and accelerated handoff procedure for organizing mobile radio station.Main thought of the present invention is to determine mobile group by other network equipment/devices in base station or network.In the time that this moves the MS execution handover operation in group, SBS processes the switching of this group mobile radio station as a whole.Preferably, SBS moves first MS in group and carries out handover operation according to traditional handoff procedure this, moves other MS in group and carry out the handover operation of " simplification " for this.Here, " simplification " refers to for other MS, due to above-mentioned entirety group hand-off process, makes MS initiate to switch the rear operation of carrying out and be simplified with respect to traditional handoff procedure.
Particularly, can be determined by relevant device in base station or networking such as motion track, up-link transmit power, residence time in community, the community of process etc. in a period of time in the past for mobile group according to the information before MS.Preferably, the setting that base station or relevant device also can move group flexibly according to the residing specific environment of mobile group.For example, the multiple MS on the train of growing in row can be divided into and belong to several mobile group.Base station or relevant equipment are incited somebody to action periodically or based on upgrading event-driven, are monitored the state of mobile group.By determining mobile group, make from base station angle, it switches group to do as a whole processing, instead of processes separately one by one.Group switching is managed and is coordinated by base station, and is transparent for the MS of this group.Handoff procedure is just simplified and be there is no an essential variation from MS angle.Hereinafter, by determine mobile group in MS be called group mobile radio station.
According to the solution of the present invention, group is switched and is divided into two main steps: the first step is the switching that meets traditional single travelling carriage switching standards that first mobile radio station in mobile group is carried out; Second step is the switching of other groups MS in mobile group.
In the first step, once SBS obtains the handover request sending from a MS of mobile group, group is switched and will be triggered.Or SBS is based on some reason, for example interim traffic overload, link congestion, or the switching mode of a place mobile network network enabled control etc., send switching command to first MS that meets switching condition in mobile group, and group is switched and also can be triggered.Here, because the each MS in mobile group has similar motion track, moving characteristic etc., thereby TBS is identical.SBS starts to send the relevant information of all MS in mobile group to contiguous TBS, and with the information of TBS exchange correlation.Preferably, also can start the information that in group, the switching set-up procedure order of all mobile radio stations will transmit, and some and network reentry relevant certain operations, for example re-authentication, re-authorization, re-injection volume etc.The information exchange of preparing for the switching of the group MS for movement group, can be bundled in single or several stream of packets with batch mode, instead of looks like in traditional solution the processing one by one of each mobile radio station.
In second step, the every other MS in mobile group, triggers and completes the switching from SBS to TBS by following the process similar to traditional mode.Difference is: switch in set-up procedure, some steps needn't be carried out again, because be finished at above-mentioned first step, and such as re-authorization, re-injection volume etc.; Preferably, for mobile group, except the MS that first triggering group is switched, in the time that in group, other MS carries out switching, ranging process can be omitted.This is that they are all basic identical with the distance of arbitrary base station because all mobile terminals have identical motion track and similar position in group, thereby the ranging information that triggers first mobile radio station switching can be reused for other and organizes MS.
Fig. 3 illustrates the group handoff procedure in IEEE802.16 network.Wherein, the access station of the current service of MS and target access station can be both base station BSs, can be also relay station RS (RelayStation).MS1, MS2......MSn are mobile groups in the same vehicles.Preferably, they move to contiguous TBS or TRS from SBS or SRS with identical track simultaneously.From group MS angle, handoff procedure is as usual performed.They detect the DL signal of contiguous BS, select for community.For a MS in mobile group, if meet predefined switching threshold, for example MS1 meets, and MS1 will send handover request message MOB MSHO-REQ to SBS/SRS, to initiate independent switching.Recommend/preferably TBS/TRS list also will be included in this message.Receive MOB MSHO-REQ, SBS/SRS searches the potential TBS/TRS in recommendation list, and is a preferred TBS/TRS of MS1 selection.This TBS/TRS choosing also will be regarded as the TBS/TRS of other MS in group.Then, the relevant information of MS1, for example MAC Address, all candidates' target TBS/TRS, basic capacity and key information, as TEK information, to be included in switching pre-processing request message HO pre-notification, and be sent to TBS/TRS, for entering control.Meanwhile, in group, the relevant information of other MS also will be sent to TBS/TRS.SBS/SRS mono-obtains the switching pre-processing response message from TBS/TRS, just sends switching response message to MS1.The relevant information of these groups MS will by with batch mode processing, in order to the minimizing of expense, instead of be used multiple stream to process one by one the mode of the common switching of processing one by one MS of picture.Preferably, SBS/SRS can carry out batch mode processing to the information of group mobile radio station based on multiple strategy.For example in an independent stream of packets, transmit, or in several stream of packets, transmit respectively according to concrete network environment.Preferably, SBS/SRS separately processes the relevant information of other MS in the relevant information of first MS and group, send separately MS to TBS/TRS, preferably first it is transmitted, by the relevant information of other MS in group with batch mode processing, be contained in one/several stream of packets and send TBS/TRS to, the transmission of this part information needn't a handoff preparation phase that fix on MS1 complete, and can continue to carry out according to concrete network environment.Thereby, SBS/SRS needn't wait for the response of TBS/TRS to all information, as long as TBS/TRS switches and prepares response the delivering of first MS, SBS/SRS just sends switching response message to MS, this will further improve the efficiency of switching, avoids MS1 to switch the extra time delay that may occur.Receive after switching response message, MS1 sends and switches instruction to SBS.Subsequently, start range finding and the network reentry step for MS1.Safe key, CID and some other information will be updated in this stage.After this, MS1 has just completed the switching from SBS/SRS to TBS/TRS.
Preferably, network at MS1 is entering the stage, and TBS/TRS can, according to the data that obtained by above-mentioned switching set-up procedure, start as organizing interior all MS lastest imformations, the new CID of for example each MS, ready in advance in order to be the switching that after this interior other MS of group initiate.Thereby when other MS in mobile group initiate after handover request, TBS can directly send to MS by predetermined cid information in the network stage of reentrying, instead of determines temporarily, this will further reduce time delay and service outage duration.
Preferably, carry out in the process of switching at MS1, information interaction or the processing of SBS/SRS, TBS/TRS and the MS that carries out between them, all taking preferential mutual/relevant information of processing MS1 as principle, ensureing under MS1 prerequisite normal as traditional switching mode, that switch in time, for information interaction and preparation are carried out in the switching of other MS in mobile group in advance.
Preferably, the switching that TBS/TRS sends to SBS/SRS is prepared response also by with batch mode transmission.
Preferably, except the MS that first initiation group is switched, i.e. MS1 in this example, in the time that the MS in group initiates handover request, preferred access station list or Link Quality Reports can be included in handover request message.
Oneself is initiated the switching from SBS/SRS to TBSTRS by other groups MS, and follow similar switch step.Different from traditional handoff procedure is, due to the relevant information for organizing interior all mobile terminals, or switch the needed information of set-up procedure and carried out in advance, therefore in mobile group, other MS carry out the operation that does not need to carry out handoff preparation phase while switching.Thereby once SBS/SRS receives the handover request MOB MSHO-REQ message from other MS in group, SBS/SRS just sends it back handoff response MOB BSHO-RSP message, and does not need to wait for the response message from TBS/TRS.Preferably, due to whole group of mobile radio station often location comparison approach and there is the distance roughly the same apart from base station, therefore by sharing identical ranging information, except first group MS that triggering group is switched, the range finding step of all groups of interior other MS also can be omitted.Thereby for other MS in group, delay and service outage duration are further reduced.Preferably, for the network reentry stage, the information such as the re-authentication of interior other MS of group, re-authorization, re-injection volume, before it starts handover operation, are sent to TBS/TRS by SBS/SRS.Therefore, the information that between MS, TBS/TRS, only needs alternately and MS self is closely-related, cannot be transmitted in advance by SBS/SRS before switching, for example, the switching type (being for example network control, that MS controls or the control of MS auxiliary network) that the CID of renewal, security association identifier SAID (SecurityAssociation Identifier), handover optimization option, this MS support etc.Preferably, the CID of renewal is that the MS that carries out handover operation determines by TBS/TRS in advance, thereby has further shortened the switching duration.
As an example, MS in mobile group described carried out successively the example of switching above.But, it should be appreciated by those skilled in the art that in actual applications, the performed switching of MS needs not to be and carries out completely successively in mobile group, that is to say, and MS needn't wait after last MS carries out whole handover operation, just initiates the switching of self.Thereby preferably, SBS/SRS can be according to applicable cases, as organize the size of interior MS quantity, how to determine the information of MS in mobile group with batch mode processing, to improve the treatment effeciency of TBS/TRS as far as possible.
As an example, specifically describe in IEEE 802.16 networks the process that execution group is switched above.But while it should be appreciated by those skilled in the art that first MS initiation switching in group between SBS/SRS and TBS/TRS, in the mobile group that handoff preparation phase transmits, the information of all MS is not limited to above-mentioned example.Along with the difference of the network environment of concrete application, in the MS of the required transmission of handoff preparation phase relevant information also by difference, according to thought of the present invention, transmitting which information of all MS of mobile group can set as required and flexibly in the handoff preparation phase of first MS, as long as the relevant information can be in advance according to the process of switching transmitting between the two at SBS/SRS and TBS/TRS, can be arranged on after access station receives the handover request that first MS sends in mobile group of the present invention and start to transmit.
As an example, described other MS for the MS switching except first triggering group in mobile group above, the information that TBS/TRS transmits according to the handoff preparation phase of first MS, in advance for other MS determine CID.It should be appreciated by those skilled in the art that herein just to being convenient to explanation, and be not appreciated that limitation of the present invention.Along with the difference of network application environment, according to thought of the present invention, the information that TBS/TRS can transmit according to the handoff preparation phase at first MS, also can be in conjunction with the relevant information of other switchings that will carry out to MS of TBS/TRS, in advance for MS determines that all execution at MS can predetermined information before switching.
Fig. 4 shows according to the device in the SBS/SRS of being arranged on of the present invention.As shown in Figure 4, this device can comprise mobile group determination module, for mobile radio station MS is formed to mobile group; Judge module, for the MS that judges whether handover request is switched from first initiation group of mobile group; Group switching controls module, for group is switched and managed, if handover request is first handover request of mobile group, in the handoff preparation phase of this MS, starts the relevant information of all MS of mobile group to send to TBS/TRS with batch mode.If not, show that this handover request is from other MS in mobile group, in handoff procedure, for the information that has sent to before TBS/TRS, just do not need to repeat to have sent, such as the relevant information of other MS, re-authentication, re-authorization, heavy log-on message etc. in mobile group in above-mentioned example.
Optionally, this device also can comprise that receiver module is to substitute mobile group determination module, for receiving mobile group of information.Correspondingly, determine that the work of mobile group is completed by other equipment in network, for example independent server for definite mobile group, or other have the access station of redundant resource etc.
Optionally, in the time that this device is arranged in the access station in existing wireless network, access station except have that common access station has for receiving and the device that switches the receiving system of relevant information, switches for sending and switch the dispensing device of relevant information, also comprised the group that realizes as shown in Figure 4 in network.
Fig. 5 shows according to the device in the TBS/TRS of being arranged on of the present invention.As shown in Figure 5, this device can comprise receiver module, for receiving the relevant information of the mobile all MS that organize that send with batch mode; Group handover information determination module, for according to the information receiving, switches relevant information in advance for MS is definite.
Optionally, in the time that this device is arranged in the access station in existing wireless network, access station except have that common access station has for receiving and the device that switches the receiving system of relevant information, switches for sending and switch the dispensing device of relevant information, also comprised the group that realizes as shown in Figure 5 in network.
Although above mainly taking base station BS or relay station RS as example, in the present invention, the network equipment of service is provided can be any network equipment, device, the node that access can be provided for mobile radio station in base station, relay station and wireless network for mobile group.Although above mainly taking mobile radio station MS as example, it will be appreciated by those skilled in the art that it should not serve as limitation of the present invention.For example in different technical standards, different to the title of mobile radio station also possibility, as mobile radio station in 3GPP is called as user equipment (UE).Mobile radio station in the present invention can be the terminal that moves and use any type of some business in wireless network in the wireless network with the network equipment that access service is provided, as mobile phone, PDA etc.
Method of the present invention can be by implement software, also can be implemented by hardware module, device, equipment, or above-mentioned combination, for example ASIC.And above-mentioned software, module, device, equipment can be positioned at Same Physical node or equipment, also can be positioned at physical node or the equipment of separation.
Above-mentioned example and accompanying drawing are only for illustrating thought of the present invention, be not appreciated that limitation of the present invention, for example method flow needn't be completely strictly corresponding one by one with flow process of the present invention, also can the concrete structure of said apparatus/module further be split, be merged.Any embodiment based on thought of the present invention it will be appreciated by those skilled in the art that except above-mentioned example, within all can fall into protection scope of the present invention.
Claims (18)
1. a method of switching for the group of wireless network, comprises step:
A. at least two mobile radio stations are formed to mobile group;
B. when the handover request of a mobile radio station in receiving first from described mobile group, in the handoff preparation phase of this mobile radio station, the relevant information that the access station of current service starts this to move all mobile radio stations in group sends to target access station with batch mode;
C. receiving after the response of target access station, the access station of current service sends handoff response to the mobile radio station that sends at first handover request, and this mobile radio station is carried out handover operation;
D. when the handover request of other mobile radio stations in receiving from described mobile group, the access station of current service no longer repeats to be sent in the information that described handoff preparation phase sent and directly sends handoff response to described other mobile radio stations.
2. method according to claim 1, is characterized in that, determines described mobile group according to the motion track of mobile radio station and/or moving characteristic.
3. method according to claim 1, is characterized in that, the access station of current service, in described batch mode, separates processing by the relevant information of the mobile radio station that sends at first handover request with the relevant information of interior other mobile radio stations of mobile group.
4. according to the method described in arbitrary claim in claims 1 to 3, it is characterized in that, described relevant information be mobile radio station in the needed information of handoff preparation phase and/or mobile radio station needed information in handoff procedure.
5. according to the method described in arbitrary claim in claims 1 to 3, it is characterized in that, the information that target access station sends with batch mode according to current service access station, for the mobile radio station in mobile group pre-determines and switches relevant information.
6. according to the method described in arbitrary claim in claims 1 to 3, it is characterized in that, in step D, when other mobile radio stations of described mobile group switch, do not carry out ranging process, reuse the ranging information of the mobile radio station that sends at first handover request.
7. the device switching for the group of wireless network, this device comprises:
Receiver module, is configured to receive mobile group of information;
Judge module, is configured to judge that whether handover request is first from a mobile radio station in described mobile group;
Group switching controls module, being configured to control group switches, according to the judgement of judge module, if handover request is first from a mobile radio station in described mobile group, in the handoff preparation phase of this mobile radio station, the relevant information that starts this to move all mobile radio stations in group sends to target access station with batch mode; If not, in the handoff procedure of this mobile radio station, no longer repeat to be sent in the information that described handoff preparation phase sent and directly send handoff response to this mobile radio station.
8. the device switching for the group of wireless network, this device comprises:
Mobile group determination module, is configured to mobile radio station to form mobile group;
Judge module, is configured to judge that whether handover request is first from a mobile radio station in described mobile group;
Group switching controls module, being configured to control group switches, according to the judgement of judge module, if handover request is first from a mobile radio station in described mobile group, in the handoff preparation phase of this mobile radio station, the relevant information that starts this to move all mobile radio stations in group sends to target access station with batch mode; If not, in the handoff procedure of this mobile radio station, no longer repeat to be sent in the information that described handoff preparation phase sent and directly send handoff response to this mobile radio station.
9. the equipment switching for the group of wireless network, for forming mobile radio station mobile group or for receiving the information of mobile group; For judging that whether the handover request that receives is a mobile radio station from described mobile group first; If be a mobile radio station from described mobile group first for handover request, in the handoff preparation phase of this mobile radio station, the relevant information that starts this to move all mobile radio stations in group sends to target access station with batch mode; For if not, in the handoff procedure of this mobile radio station, no longer repeat to be sent in the information that described handoff preparation phase sent and directly send handoff response to this mobile radio station.
10. the device switching for the group of wireless network, this device comprises:
Receiver module, be configured to receive the relevant information of all mobile radio stations in mobile group that sends with batch mode, when this relevant information is the handover request of a mobile radio station in receiving first from described mobile group, be sent out in the handoff preparation phase of the mobile radio station that sends described handover request;
Group handover information determination module, is configured to according to the information of receiver module reception, is that all mobile radio stations in described mobile group are determined the relevant information of switching in advance.
11. 1 kinds of equipment that the group for wireless network is switched, for receiving the relevant information of all mobile radio stations of mobile group that send with batch mode, when this relevant information is the handover request of a mobile radio station in receiving first from described mobile group, be sent out in the handoff preparation phase of the mobile radio station that sends described handover request; For according to the information receiving, be that all mobile radio stations in described mobile group are determined the relevant information of switching in advance.
12. 1 kinds of equipment that the group for wireless network is switched, this equipment comprises:
Receiving system, for receiving the information relevant to switching from mobile radio station and other access devices;
Dispensing device, for sending to described mobile radio station and other access devices and switching relevant information;
It is characterized in that, also comprise the group switching device shifter as described in claim 7,8 or 10.
13. 1 kinds of equipment that the group for wireless network is switched, comprising:
For at least two mobile radio station compositions being moved to the devices of group;
For when receive first from the mobile radio station of described mobile group handover request time, in the handoff preparation phase of this mobile radio station, make the access station of current service start this relevant information that moves all mobile radio stations in group to send to batch mode the device of target access station;
For receiving after the response of target access station, make the access station of current service send the device of handoff response to the mobile radio station that sends at first handover request, wherein, this mobile radio station is carried out handover operation;
For when receive from other mobile radio stations of described mobile group handover request time, make the access station of current service no longer repeat to be sent in the information that described handoff preparation phase sent device and directly to other mobile radio stations transmission handoff response that send handover request.
14. equipment according to claim 13, is characterized in that, determine described mobile group according to the motion track of mobile radio station and/or moving characteristic.
15. equipment according to claim 13, is characterized in that, the access station of current service, in described batch mode, separates processing by the relevant information of the mobile radio station that sends at first handover request with the relevant information of interior other mobile radio stations of mobile group.
16. according to claim 13 to the equipment described in arbitrary claim in 15, it is characterized in that, described relevant information be mobile radio station in the needed information of handoff preparation phase and/or mobile radio station needed information in handoff procedure.
17. according to claim 13 to the equipment described in arbitrary claim in 15, it is characterized in that, the information that target access station sends with batch mode according to current service access station, for the mobile radio station in mobile group pre-determines and switches relevant information.
18. according to claim 13 to the equipment described in arbitrary claim in 15, it is characterized in that, in the time that other mobile radio stations of described mobile group switch, does not carry out ranging process, reuses the ranging information of the mobile radio station that sends at first handover request.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| PCT/CN2008/072199 WO2010022560A1 (en) | 2008-08-29 | 2008-08-29 | Method and apparatus for group handover in wireless network |
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| CN102084691B true CN102084691B (en) | 2014-11-05 |
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| KR101360835B1 (en) * | 2012-01-31 | 2014-02-12 | 성균관대학교산학협력단 | A method for offering handover of mobile terminal |
| CN104303546B (en) | 2012-05-03 | 2018-10-12 | 瑞典华为技术有限公司 | Optimize the handoff parameter setting of terminal on public transportation platform |
| EP2958372B1 (en) | 2013-02-18 | 2019-05-08 | Huawei Technologies Co., Ltd. | Method, device and system for handover of user equipment group |
| WO2016023214A1 (en) * | 2014-08-14 | 2016-02-18 | Telefonaktiebolaget L M Ericsson (Publ) | Methods and apparatuses for performing a handover in a high-speed traffic environment |
| EP3506674B1 (en) * | 2016-09-30 | 2021-03-31 | Huawei Technologies Co., Ltd. | Handover method, apparatus and system |
| CN113316167B (en) * | 2017-03-24 | 2024-05-17 | 华为技术有限公司 | Information indication method and device |
| CN116456414A (en) * | 2022-01-07 | 2023-07-18 | 华为技术有限公司 | Switching method, device and system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1874594A (en) * | 2005-06-01 | 2006-12-06 | 华为技术有限公司 | Implementation method for switching terminals in wireless communication system |
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