WO2010022560A1

WO2010022560A1 - Method and apparatus for group handover in wireless network

Info

Publication number: WO2010022560A1
Application number: PCT/CN2008/072199
Authority: WO
Inventors: 张凯宾; 沈钢; 刘继民
Original assignee: 上海贝尔阿尔卡特股份有限公司; 阿尔卡特朗讯公司
Priority date: 2008-08-29
Filing date: 2008-08-29
Publication date: 2010-03-04
Also published as: CN102084691B; CN102084691A

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

Method and apparatus for group switching in a wireless network

The present invention relates to wireless networks, and more particularly to methods and apparatus for handover of group mobile stations in a wireless network.

Background technique

Currently, in a wireless network, especially a cellular-based mobile network, if a mobile station MS (Mobile Station) moves from one cell to a neighboring cell, the mobile station will perform a series of steps to make an ongoing call or data. The transfer is transferred from the currently serving access station to the adjacent target access station, which is called handover/handoff. In general, the handover is managed by the currently serving base station SBS (Serving Base Station) and requires complex signaling exchanges between the mobile station and the currently serving/target access station, which causes control signaling overhead and traffic. Delay in transmission. When performing network reentry related operations during the handover process, such as re-authentication, re-authorization, ranging, etc., traffic transmission may be interrupted. If there are frequent handovers in the network, the situation will be even worse. Unfortunately, with the development of wireless technology, at least the following factors will make switching more frequent.

First, the frequency of future radio technologies will become higher, such as 3.5 GHz. The high propagation loss characteristics of high-frequency signals will greatly reduce the cell radius and increase the number of base stations. As a result, the mobile station has to perform during high-speed movement. Frequent switching to traverse multiple smaller cells. In addition, in future mobile networks, it will be possible to set up relay stations to enhance network throughput and extend coverage. However, the coverage of the relay station is much smaller than that of the base station, which makes switching between relay stations or between the relay station and the base station more frequent.

Second, more and more people are accustomed to using mobile services, such as trains or buses, in transportation. When a vehicle traverses two adjacent cells in a cellular network during a mobile, the mobile station carrying the vehicle has to perform a handover from the source access station to the target access station. If there are many mobile stations on the vehicle, performing handovers of all mobile stations will have a significant impact on network performance. Moreover, because of the faster speed of vehicles (IMT-Advanced Future radio technologies have been required to support high-speed mobility of up to 350 km/h), thus potentially generating a large amount of handover signaling for multiple mobile stations in a very short period, which is for access stations and backhaul

(backhaul) The network will be a big burden. This requires the access station to have more powerful concurrent processing capabilities.

However, in the existing wireless technology, there is currently no dedicated solution to the group mobility problem. The traditional mobile solution is to handle the switching of each mobile station separately and independently, regardless of whether they have the same movement trajectory. Figure 1 shows the processing of a conventional solution.

MS1, MS2... MSn are group mobile stations with the same mobility characteristics, for example, MS1, MS2... MSn are on the same vehicle. Each mobile station in the group mobile station performs the handover process independently. First, they monitor the DL (downlink) signal of the neighboring BS, the scan signal in Figure 1, for cell selection. If the pre-defined threshold in MS1 is met, MS1 sends a handover request message to the currently serving base station, triggering the handover of MS1. The recommended/preferred target base station TBS (Target Base Station) list will also be included in this message. Based on the received handover request, the SBS begins negotiating with the potential TBS in the recommendation list and selects a preferred TBS for MS1. Once the TBS is determined, the SBS sends a handover response to the MS1, and the information identifying the determined TBS is included in the handover response message. Based on the received response message, the MS1 sends a handover indication to the SBS, thereby disconnecting from the SBS, and initiating a ranging procedure (including a ranging request and a ranging response step) with the TBS. Subsequently, MS1 enters the network reentry phase, in which operations such as ranging, re-authentication, and re-authorization are performed at this stage. Switching for other mobile stations in the mobile group will also be performed in a similar manner. For all mobile stations, the signaling overhead and the duration of the handover, especially the time of service interruption, are substantially the same. Therefore, this is not the best solution to the group mobility problem.

In addition, in the IEEE802.16j multi-hop relay task group, Nokia and some other companies have proposed group switching ideas. The solution requires MRS (Mobile Relay Station) for each vehicle, as shown in Figure 2. Due to the limitations of backward compatibility, the MRS is transparent to the mobile station and the MRS acts as a proxy to handle the handover. As shown in FIG. 2, the MRS performs a procedure similar to the handover of the MS in the prior art, monitors the DL signal of the neighboring BS and transmits a handover request (MOB_MSHO-REQ) of the mobile station to the SBS, similarly, SBS After determining the TBS, a handover response is sent to the MRS, and then the MRS sends a handover indication and starts the operations necessary for ranging and other network reentry. During the network re-entry process, the TBS will assign a new connection indicator CID (Connection Identification) to each connection of the mobile station belonging to the MRS, such as MS1 and MS2, and send the correspondence between the new CID and the original CID to MRS. The MRS will create a mapping relationship between the new CID and the original CID for each connection of the mobile station to which it belongs. In this way, the MRS and the TBS will transmit the group data through the connection identified by the new CID, and the MRS and the group mobile station MS still use the connection identified by the original CID for data transmission, thereby making the mobile station MS switch during the MRS. It is also possible to stay connected to the MRS. The biggest advantage of this method is that the process of group mobile station CID update is omitted, but if it is to ensure that the group mobile station does not intervene in the handover process during the MRS movement process, it is necessary to allocate independent spectrum resources for the MRS for the intra-group mobile station. Access, to ensure that the MRS does not interfere with other base stations or relay stations during the mobile process, which is difficult to achieve in the actual network. In addition, a major drawback of this solution is that it is only applicable to networks with mobile relay stations MRS.

In addition, Motorola has also proposed a method of group switching. The method requires the base station or access station to send the group identity to all mobile stations attached to the group. In other words, group switching is not transparent to the MS. Therefore, for group switching and the original independent switching of each mobile station, the MS must follow two different switching procedures. This adds complexity to the protocol and system and is not an efficient solution for wireless network mobility.

It can be seen from the above that in a mobile environment, especially for a group mobile station environment in a high speed vehicle, how to reduce the switching overhead and speed up the handover process is an urgent problem to be solved.

Summary of the invention

The present invention is directed to a method and apparatus for group switching in a wireless network for solving the above problems, achieving at least a certain reduction in handover overhead and speeding up the handover procedure.

The present invention provides a method for group switching of a wireless network, comprising the steps of:

A. Grouping at least two mobile stations into a mobile group;

B. When the handover request from the mobile station of the mobility group is received for the first time, in the handover preparation phase of the mobile station, the currently served access station starts to send related information of all mobile stations of the mobility group in batch mode. To the target access station; After receiving the response of the target access station, the currently serving access station sends a handover response to the mobile station that first sent the handover request, and the mobile station performs a handover operation;

When the other mobile stations of the mobility group perform handover, the currently serving access station does not repeatedly transmit the information that has been sent during the handover preparation phase.

Preferably, the movement group is determined based on a movement trajectory and/or a movement characteristic of the mobile station. Preferably, the currently serving access station separates the related information of the mobile station that first transmitted the handover request from the related information of other mobile stations in the mobile group in the batch mode.

The related information is information required by the mobile station in the handover preparation phase and/or information required by the mobile station during the handover process.

Preferably, the target access station predetermines the information related to the handover for the mobile station within the mobility group based on the information currently transmitted by the serving access station in the batch mode.

Preferably, when the other mobile stations of the mobility group perform handover, the ranging procedure is not performed, and the ranging information of the mobile station that first transmitted the handover request is reused.

The present invention also provides an apparatus for group switching of a wireless network, the apparatus comprising: a receiving module configured to receive mobile group information;

a determining module configured to determine whether the handover request is a first handover request from a mobile station of the mobility group;

a group switching control module configured to control the group switching. According to the judgment of the determining module, if the switching request is a first switching request from the mobile station of the mobile group, the mobile station starts the mobile switching preparation phase The relevant information of all the mobile stations of the group is sent to the target access station in the batch mode; if not, the information that has been sent in the handover preparation phase is not repeatedly transmitted during the handover of the mobile station.

The present invention also provides an apparatus for group switching of a wireless network, the apparatus comprising: a mobile group determining module configured to group the mobile station into a mobile group;

a group switching control module configured to control group switching, according to the judgment of the determining module, if the switching request is a first handover request from the mobile station of the mobile group, then at the mobile station In the handover preparation phase, the related information of all the mobile stations of the mobility group is started to be sent to the target access station in the batch mode; if not, the handover preparation phase is not repeatedly sent during the handover of the mobile station. Information.

The present invention also provides an apparatus for group switching of a wireless network, configured to group the mobile station into a mobile group or to receive information of the mobile group, and to determine whether the received handover request is from the mobile group. a first handover request of the mobile station; for if the handover request is a first handover request from the mobile station of the mobility group, in the handover preparation phase of the mobile station, starting to correlate information about all mobile stations of the mobility group The mode is sent to the target access station; if not, the information that has been sent in the handover preparation phase is not repeatedly transmitted during the handover of the mobile station.

The present invention also provides an apparatus for group switching of a wireless network, the apparatus comprising: a receiving module configured to receive information about all mobile stations of a mobile group transmitted in a batch mode;

The group handover information determining module is configured to determine handover related information for the mobile station in advance according to the information received by the receiving module.

The present invention also provides an apparatus for group switching of a wireless network, configured to receive related information of all mobile stations of a mobile group transmitted in a batch mode; and configured to determine a handover for the mobile station in advance according to information received by the receiving module. relevant information.

The present invention also provides an apparatus for group switching of a wireless network, the apparatus comprising: receiving means for receiving handover related information from the mobile station and other access devices; transmitting means for The mobile station and other access devices transmit information related to the handover; characterized in that it further comprises the group switching device according to claim 7, 8 or 10.

The present invention also provides a computer program for group switching of a wireless network, comprising instructions to perform the above methods, apparatus, and apparatus.

The present invention also provides a storage medium having stored thereon instructions for performing the above methods, apparatus, and apparatus.

The invention also provides a computer system comprising a processor for executing the computer program described above. According to the solution of the present invention, since the currently serving access station transmits all mobile station related information in the mobile group to the target access station in the batch mode, instead of transmitting separately for each mobile station as in the conventional handover method, The signaling overhead between the current serving access station and the target access station is significantly reduced. And, when the response message is transmitted from the target access station to the currently serving access station in the batch mode, the signaling overhead will be further reduced. In addition, the currently serving access station can only select the target access station for all mobile stations in the mobile group by performing a negotiation with the neighboring potential target access stations, thereby greatly reducing the time taken for the group handover.

For the mobile station in the mobile group, in addition to the first mobile station that initiates the group handover, the information related to the handover, such as updated connection information, re-authentication, etc., has been transmitted to the target access station before its handover. Therefore, the switching duration (interruption time) is significantly reduced. For example, in IEEE802.16e, it takes 20ms to transmit the mobile station related information from the SBS to the corresponding message of the TBS. In addition, when it reuses the ranging information of the first mobile station in the mobile group that initiates the group handover, when the ranging step is omitted, the duration of the handover, especially the time of the service interruption, is further reduced. For example, in an IEEE 802.16e network, the ranging process during handover may take 40-85ms.

In summary, compared with the existing handover method, the solution of the present invention can significantly reduce the signal overhead in the group handover process and accelerate the handover process, thereby significantly reducing the service interruption time and improving the service shield of the wireless service. the amount. Moreover, compared with Nokia's solution, the present invention does not need to provide other additional network element devices, which not only saves cost, but also achieves good compatibility with existing network environments, and can be applied to wireless with relay stations. Network, not limited to multi-hop relay networks with MRS. At the same time, it is transparent to the mobile station and thus does not require any additional support functions of the mobile station.

Advantageous effects, features, advantages and the like of the present invention will be better understood from the following detailed description and drawings.

In the present invention, group switching or group movement refers to a switching problem of a group of mobile stations having similar moving trajectories or features unless explicitly stated. Unless explicitly stated, a group mobile station refers to a group of mobile stations having similar movement trajectories and moving characteristics, for example, mobile stations in the same vehicle. Unless explicitly stated, group switching refers to the switching process of all mobile stations in the group. DRAWINGS

Figure 1 shows the handover procedure of the MS in IEEE 802.16e;

Figure 2 shows the handover procedure of the MRS with the attached MS;

Figure 3 is a diagrammatic view showing an example of a group switching process in IEEE 802.16 according to the present invention;

Fig. 4 diagrammatically shows an example of a device according to the invention arranged in an SBS/SRS; Fig. 5 diagrammatically shows an example of a device according to the invention arranged in a TBS/TRS. detailed description

The present invention provides a new handover solution that reduces signaling overhead and speeds up the handover process for group mobile stations. The main idea of the invention is to determine the mobility group by the base station or other network devices/devices in the network. When the MS in the mobility group performs a handover operation, the SBS processes the handover of the group of mobile stations as a whole. Preferably, the SBS performs a handover operation according to a conventional handover procedure for the first MS in the mobility group, and performs a "simplified" handover operation for other MSs in the mobility group. Here, "simplification" means that for other MSs, due to the above-mentioned overall group, the mobility group may be determined by the base station or related devices in the network according to information before the MS, such as mobile trajectory, uplink transmission power, The time of stay in the cell, the cell that passed in the past period of time, and the like. Preferably, the base station or related device can also perform flexible mobility group setting according to the specific environment in which the mobile group is located. For example, multiple MSs on a longer train can be divided into several mobile groups. The base station or associated device will be driven periodically or based on update events to monitor the status of the mobile group. By determining the mobile group, it makes the group switching as a whole from the perspective of the base station, rather than processing it individually. Group switching is managed and coordinated by the base station and is transparent to the MS of the group. The switching process is only simplified from the MS perspective and there is no change in the shield. Hereinafter, the MSs within the determined mobility group are referred to as group mobile stations.

According to the solution of the present invention, group switching is divided into two main steps: The first step is to switch the traditional single mobile station switching standard to the first mobile station in the mobile group; the second step is to move the group. Switching between other groups of MSs. In the first step, once the SBS obtains a handover request from one MS of the mobile group, the group handover will be triggered. Or the SBS sends a handover command to the first MS in the mobility group that meets the handover condition based on some reason, such as temporary service overload, link congestion, or the mobile network only supports the network control handover mode. Can be triggered. Here, since each MS in the mobile group has a similar moving trajectory, moving characteristics, and the like, the TBS is the same. The SBS starts to send information about all MSs in the mobility group to the neighboring TBS and exchanges information related to the TBS. Preferably, it is also possible to start the switching of all mobile stations in the group to prepare the information to be transmitted by the program, as well as some operations related to network re-entry, such as re-authentication, re-authorization, re-registration and the like. For information exchange for handover preparation of a group MS for a mobile group, it can be packaged into a single or several packet streams in a batch mode instead of processing each mobile station one by one like in a conventional solution.

In the second step, all other MSs in the mobile group will follow a process similar to the legacy mode to trigger and complete the handover from SBS to TBS. The difference is that: during the handover preparation process, some steps do not have to be performed again, because the first step has been performed, such as re-authorization, re-registration, etc.; preferably, for the mobile group, except for the first trigger group switching MS When the other MSs in the group perform handover, the ranging process can be omitted. This is because all mobile terminals in the group have the same movement trajectory and similar positions, and they are basically the same distance from any base station, so the ranging information of the first mobile station that triggers the handover can be reused for other groups of MSs. .

FIG. 3 shows a group switching procedure in an IEEE 802.16 network. The access station and the target access station currently served by the MS may be either the base station BS or the relay station RS (Relay Station). MS1, MS2... MSn are mobile groups in the same vehicle. Preferably, they simultaneously move from the SBS or SRS to the adjacent TBS or TRS with the same trajectory. From the perspective of the group MS, the switching process is performed as usual. They detect the DL signal of the neighboring BS for cell selection. For an MS in the mobility group, if a predefined handover threshold is met, eg, MS1 is satisfied, MS1 will send a handover request message MOB_MSHO-REQ to SBS/SRS to initiate a separate handover. The recommended/preferred TBS/TRS list will also be included in this message. Received potential in MOB_MSHO-REQ, SBS/SRS search recommendation list TBS/TRS, and select a preferred TBS/TRS for the MSI. The selected TBS/TRS also treats the TBS/TRS of other MSs in the group. Then, relevant information of MS1, such as MAC address, all candidate target TBS/TRS, basic capabilities, and key information, such as TEK information, will be included in the handover pre-processing request message HO pre-notification and sent to the TBS. /TRS, used to enter control. At the same time, information about other MSs in the group will also be transmitted to TBS/TRS. SBS/SRS—When a handover pre-processing response message is received from the TBS/TRS, a handover response message is sent to MS1. The relevant information of these groups of MSs will be processed in batch mode for the reduction of overhead, rather than using multiple streams one by one as in the usual way of handling MS switching one by one. Preferably, the SBS/SRS may perform batch mode processing on the information of the group mobile station based on a plurality of policies. For example, it is transmitted in a separate packet stream, or transmitted in several packet streams according to a specific network environment. Preferably, the SBS/SRS separately processes the related information of the first MS and the related information of other MSs in the group, and separately transmits the MS to the TBS/TRS, preferably transmits it first, and information about other MSs in the group. It is processed in the batch mode and is transmitted to the TBS/TRS in one/several packet streams. The transmission of this part of information does not have to be completed in the handover preparation phase of the MS1, and can be continued according to the specific network environment. Therefore, the SBS/SRS does not have to wait for the TBS/TRS to respond to all the information. As long as the TBS/TRS sends a handover preparation response to the information of the first MS, the SBS/SRS sends a handover response message to the MS, which further improves the handover efficiency. To avoid the extra delay that may occur with MS1 switching. After receiving the handover response message, MS1 sends a handover indication to the SBS. Subsequently, the ranging and network reentry steps for MS1 are started. The security key, CID, and some other information will be updated at this stage. Thereafter, MS1 completes the handover from SBS/SRS to TBS/TRS.

Preferably, in the network of MS1, the TBS/TRS can start to update information for all MSs in the group according to the data obtained by the above handover preparation process, for example, the new CID of each MS, for starting for other MSs in the group. The switch is ready in advance. Therefore, when other MSs in the mobility group initiate a handover request, the TBS can directly transmit the pre-determined CID information to the MS in the network re-entry phase instead of temporarily determining, which further reduces delay and service interruption time.

Preferably, in the process of performing handover by MS1, SBS/SRS, TBS/TRS and them The information exchange or processing between the MSs is based on the principle of prioritizing interaction/processing of MS1. In the case of ensuring that the MS1 is switched normally and in a timely manner as in the traditional switching mode, it is the other MSs in the mobile group. Switch the information in advance to prepare and prepare for information exchange.

Preferably, the handover preparation response sent by the TBS/TRS to the SBS/SRS is also transmitted in the batch mode.

Preferably, except for the first group switching MS, that is, the MS1 in the instance, when the MS in the group initiates the handover request, the preferred access station list or link shield report may not be included in the handover request message. in.

Other groups MS will initiate a switch from SBS/SRS to TBSTRS and follow similar switching steps. Different from the traditional handover procedure, since the related information for all mobile terminals in the group, or the information required for the handover preparation process has been previously executed, other MSs in the mobility group do not need to perform the handover preparation phase when performing handover. operating. Thus, once the SBS/SRS receives the handover request MOB_MSHO-REQ message from other MSs in the group, the SBS/SRS sends back the handover response MOB_BSHO-RSP message without waiting for a response message from the TBS/TRS. Preferably, since the entire group of mobile stations tend to be relatively close in position and have substantially the same distance from the base station, by sharing the same ranging information, except for the first group MS that triggers group switching, the ranging steps of other MSs in all groups It can also be omitted. Thus, for other MSs in the group, latency and traffic interruption time are further reduced. Preferably, for the network re-entry phase, information such as re-authentication, re-authorization, re-registration and other information of other MSs in the group has been transmitted to the TBS/TRS by the SBS/SRS before the handover operation is started. Therefore, MS, TBS/TRS only need to exchange information that is closely related to the MS itself and cannot be pre-transmitted by SBS/SRS before handover, for example, updated CID, Security Association Identifier, handover Optimization options, the type of handover supported by the MS (for example, network-controlled, MS-controlled, or MS-assisted network-controlled). Preferably, the updated CID is previously determined by the TBS/TRS for the MS performing the handover operation, thereby further shortening the handover duration.

As an example, the above describes an example in which the MSs in the mobile group sequentially perform handover. However, those skilled in the art should understand that in practical applications, the handover performed by the MS in the mobility group is not It must be done in complete order, that is, the MS does not have to wait for the previous MS to perform the entire switching operation before initiating its own handover. Therefore, preferably, the SBS/SRS may determine how to process the information of the MSs in the mobile group in a batch mode according to an application situation, such as the number of MSs in the group, to maximize the processing efficiency of the TBS/TRS.

By way of example, the process of performing group switching in an IEEE 802.16 network is specifically described above. However, those skilled in the art should understand that when the first MS in the group initiates the handover between the SBS/SRS and the TBS/TRS, the information of all the MSs in the mobility group transmitted in the handover preparation phase is not limited to the above example. Depending on the network environment of the specific application, the MS related information that needs to be transmitted during the handover preparation phase will also be different. According to the idea of the present invention, what information of all MSs of the mobile group is transmitted in the handover preparation phase of the first MS can be based on Needed and flexible setting, as long as the related information that can be transmitted between the SBS/SRS and the TBS/TRS in advance according to the switching process can be set at the access station to receive the first in the mobile group of the present invention. The transfer is initiated after the switch request from the MS.

By way of example, the above describes the other MSs in the mobile group except the MS that triggered the first group switching, the TBS/TRS determines the CID for the other MSs based on the information transmitted during the handover preparation phase of the first MS. It should be understood by those skilled in the art that the present invention is not to be construed as limiting. Depending on the network application environment, according to the idea of the present invention, the TBS/TRS may be based on the information transmitted in the handover preparation phase of the first MS, or may be combined with other information related to the handover of the TBS/TRS to be performed by the MS. All the information that can be predetermined before the MS performs the handover is determined for the MS in advance.

Figure 4 shows an apparatus arranged in an SBS/SRS in accordance with the present invention. As shown in FIG. 4, the apparatus may include a mobility group determining module, configured to group the mobile station MS into a mobility group, and a determining module, configured to determine whether the handover request is from the first initiating group switching MS of the mobility group; a module, configured to manage group switching, if the handover request is the first handover request of the mobility group, in the handover preparation phase of the MS, start to send related information of all MSs of the mobility group to the TBS/TRS in batch mode . If not, it indicates that the handover request is from another MS in the mobility group, and in the handover process, information that has been previously sent to the TBS/TRS does not need to be repeatedly sent, for example, information about other MSs in the mobility group in the above example. , re-authentication, Reauthorization, re-registration information, etc.

Optionally, the apparatus may further include a receiving module instead of the mobile group determining module, configured to receive the mobile group information. Accordingly, determining the operation of the mobility group is done by other devices in the network, such as a separate server for determining the mobility group, or other access stations with redundant resources, and the like.

Optionally, when the device is set in an access station in an existing wireless network, the access station has a receiving device for receiving information related to the handover, which is used by the ordinary access station, for sending In addition to the transmitting means for the information related to the handover, means for realizing group switching in the network as shown in FIG. 4 is also included.

Figure 5 shows an apparatus disposed in a TBS/TRS in accordance with the present invention. As shown in FIG. 5, the apparatus may include a receiving module, configured to receive related information of all MSs of the mobile group sent in the batch mode, and a group switching information determining module, configured to determine handover related information for the MS according to the received information. information.

Optionally, when the device is set in an access station in an existing wireless network, the access station has a receiving device for receiving information related to the handover, which is used by the ordinary access station, for sending In addition to the transmitting means for the information related to the handover, means for realizing group switching in the network as shown in FIG. 5 is also included.

Although the base station BS or the relay station RS is mainly exemplified above, the network device serving the mobile group in the present invention may be a station, a relay station, and any network device, device, or node in the wireless network that can provide access to the mobile station. Although the above is mainly based on the mobile station MS, it should be understood by those skilled in the art that it should not be construed as limiting the invention. For example, in different technical standards, the name of the mobile station may also be different. For example, the mobile station in 3GPP is called a user equipment UE. The mobile station in the present invention may be a network set mobile phone, PDA or the like having an access service.

The method of the present invention may be implemented by software, or by hardware modules, devices, devices, or a combination of the above, such as an ASIC. The above software, modules, devices, and devices may be located on the same physical node or device, or may be located in separate physical nodes or devices.

The above examples and the accompanying drawings are merely illustrative of the present invention and should not be construed as Limitations of the invention, for example, the method flow does not have to be strictly corresponding to the flow of the invention, and the specific structure of the above described device/module may be further split and combined. Those skilled in the art can understand that, in addition to the above examples, any embodiment based on the idea of the present invention can fall within the protection scope of the present invention.

Claims

Rights request

A method for group switching of a wireless network, comprising the steps of:

A. Grouping at least two mobile stations into a mobile group;

B. When the handover request from the mobile station of the mobility group is received for the first time, in the handover preparation phase of the mobile station, the currently served access station starts to send related information of all mobile stations of the mobility group in batch mode. To the target access station;

C. After receiving the response from the target access station, the currently serving access station sends a handover response to the mobile station that first transmitted the handover request, and the mobile station performs a handover operation;

D. When the other mobile stations of the mobile group perform the handover operation, the currently serving access station does not repeatedly transmit the information that has been sent in the handover preparation phase.

2. Method according to claim 1, characterized in that the movement group is determined on the basis of the movement trajectory and/or movement characteristics of the mobile station.

The method according to claim 1 or 2, wherein the currently served access station in the batch mode, the related information of the mobile station that first sends the handover request and the other mobile stations in the mobile group The related information is processed separately.

The method according to any one of claims 1 to 3, wherein the related information is information required by the mobile station in the handover preparation phase and/or information required by the mobile station during the handover process. .

The method according to any one of claims 1 to 4, wherein the target access station predetermines and switches the mobile station in the mobile group according to the information sent by the current serving access station in the batch mode. relevant information.

The method according to any one of claims 1 to 5, wherein, in step D, when the other mobile stations of the mobile group perform handover, the ranging process is not performed, and the first transmission switching is reused. Ranging information of the requested mobile station.

7. An apparatus for group switching of a wireless network, the apparatus comprising:

a receiving module, configured to receive mobile group information;

a determining module configured to determine whether the handover request is a mobile station from the mobile group First switch request;

8. An apparatus for group switching of a wireless network, the apparatus comprising:

a mobile group determining module configured to form the mobile station into a mobile group;

9. A device for group switching of a wireless network, configured to form a mobile station into a mobile group or to receive information of a mobile group; and to determine whether the received handover request is from a mobile station of the mobile group a first handover request; for if the handover request is a first handover request from the mobile station of the mobility group, in the handover preparation phase of the mobile station, starting to send related information of all mobile stations of the mobility group to the batch mode Target access station; for if not, in the handover process of the mobile station, the information that has been sent in the handover preparation phase is not repeatedly transmitted.

10. An apparatus for group switching of a wireless network, the apparatus comprising:

a receiving module configured to receive information about all mobile stations of the mobile group transmitted in the batch mode;

The group switching information determining module is configured to determine, in advance, handover related information for the mobile station according to the information received by the receiving module.

11. A device for group switching of a wireless network, configured to receive information about all mobile stations of a mobile group transmitted in a batch mode; for receiving information according to the receiving module, in advance The mobile station determines the information related to the handover.

12. A device for group switching of a wireless network, the device comprising:

Receiving means for receiving handover-related information from the mobile station and other access devices; transmitting means for transmitting handover-related information to the mobile station and other access devices; The group switching device of claim 7, 8 or 10.

13. A computer program for group switching of a wireless network, comprising instructions to perform any of the methods of claims 1 to 6, or to perform the apparatus of claim 7, 8 or 10, or to perform claim 9. The device described in clauses 11 or 12.