CN102187706A - Handover method and device - Google Patents

Handover method and device Download PDF

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Publication number
CN102187706A
CN102187706A CN2009801466631A CN200980146663A CN102187706A CN 102187706 A CN102187706 A CN 102187706A CN 2009801466631 A CN2009801466631 A CN 2009801466631A CN 200980146663 A CN200980146663 A CN 200980146663A CN 102187706 A CN102187706 A CN 102187706A
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China
Prior art keywords
pcid
relay station
new
target
message
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Granted
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CN2009801466631A
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Chinese (zh)
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CN102187706B (en
Inventor
张亮亮
常俊仁
李亚娟
李婷
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Changshu intellectual property operation center Co.,Ltd.
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Huawei Technologies Co Ltd
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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
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H04W36/00835—Determination of neighbour cell lists
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04—Large scale networks; Deep hierarchical networks
    • H04W84/042—Public Land Mobile systems, e.g. cellular systems
    • H04W84/047—Public Land Mobile systems, e.g. cellular systems using dedicated repeater stations

Abstract

A handover method and a device are provided. The method involves: upon learning a relay station requires a network handover, a serving base station negotiates with a target base station to determine whether physical cell identifier (PCID) conflicts might exist, assigns a new PCID to the relay station and instructs the relay station to switch to the target base station by using the new PCID. The present invention identifies in advance and avoids PCID conflicts, thereby avoiding network handover interference.

Description

A kind of switching method and apparatus
A kind of switching method and apparatus technical field
The present invention relates to wireless communication technical field, especially a kind of switching method and apparatus.Background technology
In order to improve the data throughout of Cell Edge User, and also to expand MPS process area, relaying is had been incorporated at present in 3GPP LTE-ADVANCED systems（Relay Node) node, via node include fixed relay, nomadic relaying and mobile relay.
For LTE-ADVANCED systems, each base station eNB (evolved NodeB) or relay station RN (relay node, via node) a physical area sign PCID (hysical-layer cell ID) is required for, it is used to ensure respective subordinate terminal UE (User Equipment user equipmenies) down-going synchronous by sending PCID.PCID is made up of PSS (rimary synchronization signal) and SSS (secondary synchronization signal).One has 504 PCID for using in LTE-ADVANCED.Because the introducing of relaying causes PCID demand to increase, the possibility that there is PCID multiplexings.
Mobile-relay station PCID may occur with the relay station in other cell and conflict from the case that a serving cell is moved to another cell.
The content of the invention
The embodiment of the present invention provides a kind of switching method and system, to optimize network handover routines, improves efficiency.
According to one embodiment of the invention there is provided a kind of switching method, including：
Obtaining relay station needs to be switched to the decision of target BS；
Sent to target BS and negotiation message is included in handover request, the handover request, for conflicting with whether target BS negotiation can have PCID；
The PCID lists that response negotiation message generation is included in the handoff response of target BS, the switching request response are received, the PCID lists include at least one PCID;
It is that relay station distributes a new PCID according to PCID lists, and PCID is sent more to relay station Change message, new PCID is included in PCID change message, for notifying relay station to be switched to using new PCID in target BS.
According to another embodiment of the present invention there is provided a kind of base station, including：
Switch determining unit：Need to be switched to the decision of target BS for obtaining relay station；Transmitting element, negotiation message is included for being sent to target BS in handover request, the handover request, for conflicting with whether serving BS negotiation can have PCID；
The PCID lists of response negotiation message generation are included in receiving unit, the handoff response for receiving target BS, the switching request response, the PCID lists include at least one PCID;
Allocation unit, for being that relay station distributes a new PCID according to PCID lists;
Notification unit, includes new PCID, for notifying relay station to be switched to using new PCID in target BS for being sent to relay station in PCID change message, PCID change message.One embodiment of the invention is before relay station is switched to target BS, serving BS is conflicted by there may be PCID with target BS negotiation confirmation, serving BS is that relay station distributes a new PCID, indicate that relay station enables new PCID and is switched on target BS, it can in advance recognize and avoid PCID from conflicting, it is to avoid the interference in network switching.Brief description of the drawings
The schematic flow sheet of switching method one embodiment that Fig. 1 provides for the present invention；
The schematic flow sheet for switching method another embodiment that Fig. 2 provides for the present invention；Fig. 3 is that relay station of the present invention notifies subordinate terminal to access the schematic flow sheet of the relay station one embodiment using new PCID；
The schematic flow sheet for switching method another embodiment that Fig. 4 provides for the present invention；The schematic flow sheet for switching method another embodiment that Fig. 5 provides for the present invention；Fig. 6 is the schematic flow sheet that relay station of the present invention notice subordinate terminal accesses another embodiment of the relay station using new PCID；
Fig. 7 is the schematic flow sheet that relay station of the present invention notice subordinate terminal accesses another embodiment of the relay station using new PCID；
Fig. 8 is that relay station of the present invention notice subordinate terminal accesses the relay station another reality using new PCID Apply the schematic flow sheet of example；
Fig. 9 is the structural representation of base station one embodiment provided in an embodiment of the present invention；
Figure 10 is the structural representation of switching determining unit one embodiment；
Figure 11 is the structural representation of another embodiment of switching determining unit；
Figure 12 is the structural representation of another embodiment of base station provided in an embodiment of the present invention.Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made belongs to the scope of protection of the invention.
In LTE- Advance systems comprising relay station, each BTS management belongs to multiple relay station RN of its cell, and each relaying station administration belongs to its multiple terminal UEs.System is respectively that each eNB and relay station distribute corresponding PCID, and base station periodically sends the PCID of oneself so that the relay station or terminal of base station subordinate passes through PCID down-going synchronous therewith；Relay station periodically sends the PCID of oneself so that the terminal of relay station subordinate passes through PCID down-going synchronous therewith.Due to PCID limited amount, the need for there is PCID multiplexings, the relay station between different districts may distribute base station in identical PCID, same cell by the base station each belonged to respectively may also be in relay station distribution identical PCID relatively far apart.When the mobile relay positioned at first community is moved to second community, the former PCID of mobile relay may be identical with the PCID of some relay station in second community, it can interfere between the two, cause respective subordinate to be possible to receive the synchronizing signal of other relay station.Likewise, when a relay station is moved in cell range, it is also possible to occur and neighbouring relay station PCID identical situations.Once there is the situation of this PCID conflicts, then a relay station is needed to change its PCID.
The first embodiment of the present invention provides a kind of switching method, for recognizing and solving the mark conflict in network in advance when networking switches.When knowing that relay station needs to carry out network switching, the serving BS eNBl of relay station first confirms that relay station is switched in target BS whether can have PCID conflicts；If possible there is PCID conflicts, then serving BS eNBl needs to distribute a new PCID for switching relay station；Relay station is switched to target BS after new PCID comes into force. Fig. 1 is a kind of schematic flow sheet of one embodiment of switching method of the invention, and with reference to Fig. 1, the flow includes：
S101 :Serving BS, which obtains relay station, to be needed to be switched to target BS eNB2 decision；Serving BS can make the decision of relay station switching according to the measurement report and wireless resource management information of relay station, and determine the target BS of switching；Serving BS can also receive the first handover request message of relay station transmission, with reference to situation about understanding between the measurement report, base station that relay station is reported, and make switching and determine.If including multiple candidate target base stations in the first handover request message, serving BS according to circumstances selects one from multiple candidate target base stations and is used as target BS.
S102:Serving BS sends to target BS and negotiation message is included in handover request, the handover request, for conflicting with whether serving BS negotiation can have PCID；Negotiation message includes the PCID of relay station;
Serving BS sends the information needed in handover request, the handover request comprising target BS for switching preparation resource to target BS.Serving BS through consultation with target BS consult by message, is switched to if understanding relaying after target BS, whether can have PCID conflicts in target BS.Serving BS can carry negotiation message in handover request, directly can also send negotiation message to target BS.
S103:Serving BS receives the PCID lists that response negotiation message generation is included in the handoff response of target BS, the switching request response, and the PCID lists include at least one PCID;
Receive after negotiation message, if target BS confirms to there may be PCID conflicts, select one or more PCID to be used for relaying in target BS, and sent to serving BS in switching request response, the switching request response comprising PCID lists.The list can be the PCID set that target BS is recommended or target BS it is not recommended that the PCID set used.PCID lists can be sent in switching request response, can also be sent as a single message to serving BS.
Target BS can judge the possibility that there is conflict according to situations below：
A) exist in Target cell using the website with relay station original PCID identicals PCID；Or b) exist in Target cell and Target cell peripheral cell using and relay station original PCID identicals PCID website.
S104:Serving BS, according to PCID lists, is that relay station distributes a new PCID, and is sent to relay station in PCID change message, PCID change message comprising new PCID, for notifying relay station to be switched to using new PCID in target BS. Serving BS can distribute a new PCID for relay station in the following ways:A PCID, which is selected, as new PCID from PCID lists distributes to relay station；Or, it is that relay station distributes a new PCID different from all PCID in PCID lists.
In another scheme, the time that PCID changes message can be comprising new PCID and change PCID.For notifying relaying when reaching the time for changing PCID, to use new PCID.The time for changing PCID can be absolute frame number；It can also be relative frame number, i.e., start calculating to receive the present frame of PCID message.The change time can also be setting time T (ms) of timer, terminal starts a timer when receiving the second indication message, and timer time is the change time, start to search for and receive new PCID after expiration of the timer, synchronized with services sites.Generally, the change time is not 0;If the time of change is 0.Then its effect is identical with the not specified change time.
Based on above two mode, serving BS can also include relay station switching time T in PCID change messageh, relay station switching time T in additionh, can also be carried in other message.
Further, above-mentioned flow also includes：Relay station is interacted with its subordinate terminal, notifies that its service relay stations of its subordinate terminal are constant but change PCID therefore need not perform conventional switching flow.Relay station is interacted with its subordinate terminal, notifies that its service relay stations of its subordinate terminal are constant but changing PCID therefore need not performing conventional switching flow step includes：
Relay station sends the second indication message to terminal, it is constant but therefore change PCID need not perform conventional switching flow for instruction terminal its service relay stations, configured information, new PCID are included in second indication message, the configured information represents that the services sites of ownership is constant；
Relay station changes and sent new PCID, and time so relay station if changing PCID changes and sent new PCID when reaching the PCID change times.Other relay station can also the interior information related to PCID of altering system, such as new scrambler sequence of utilization new PCID generations.Correspondingly terminal will be after the second indication message be received, according to information related to PCID in the content alteration system of instruction, information related to PCID in scrambler generating process in such as system, in addition can also be synchronous with former relay station holding using the new PCID.
It can select, the PCID changes that relay station receiving terminal is sent confirm.
In the embodiment, before relay station is switched to target BS, serving BS there may be PCID with target BS negotiation confirmation and conflict, the moon, a new PCID was distributed in good business base station for relay station, relay station is switched on target BS again after enabling new PCID, it can in advance recognize and avoid PCID from conflicting Avoid the interference in network switching.
With reference to Fig. 2, a kind of another embodiment of switching method of the invention, comprising：
S201 :Serving BS receives the measurement report that relay station is sent；
Relay station periodically or non-periodically to serving BS send measurement report, serving BS receive measurement report.
S202:Serving BS is made switching and determined, and is sent to target BS comprising negotiation message in handover request, the handover request, for conflicting with whether serving BS negotiation can have PCID；Negotiation message includes the PCID of relay station;
Serving BS determines whether relay station will switch according to measurement report and wireless resource management information, if to switch, and it is that switching prepares the information that resource needs that serving BS, which sends to target BS and target BS is included in handover request, the handover request,.
Serving BS through consultation with target BS consult by message, is switched to if understanding relaying after target BS, whether can have PCID conflicts in target BS.Serving BS can carry negotiation message in handover request, directly can also send negotiation message to target BS.
S203:Target BS confirms to there may be PCID conflicts, one or more PCID is selected to be used for relay station in target BS, and sent to serving BS comprising PCID lists in switching request response, the switching request response, the PCID lists include at least one PCID;
If target BS confirms to there may be PCID conflicts, one or more PCID is recommended to be used for relay station in target BS to serving BS.Target BS can judge the possibility that there is conflict according to situations below：
A) exist in Target cell using the website with relay station original PCID identicals PCID；Or b) exist in Target cell and Target cell peripheral cell using and relay station original PCID identicals PCID website.
According to conflict judged result, target BS provides a PCID list to serving BS, and the list can be the PCID set that target BS is recommended or target BS it is not recommended that the PCID set used.PCID lists can be sent in switching request response, can also be sent as a single message to serving BS.PCID lists are carried in handover request, it is not necessary to increase new message, can be compatible with existing protocol well.
S204:Serving BS, according to PCID lists and the PCID service conditions of this cell, is relay station A new PCID is distributed, and is sent to relay station in PCID change message, PCID change message comprising new PCID, for notifying relay station to use new PCID.
Serving BS can distribute a new PCID for relay station in the following ways:A PCID, which is selected, as new PCID from PCID lists distributes to relay station；Or, it is that relay station distributes a new PCID different from all PCID in PCID lists.
In another scheme, the time that PCID changes message can be comprising new PCID and change PCID.For notifying relay station when reaching the time for changing PCID, to use new PCID.Based on above two mode, serving BS can also include relay station switching time T in PCID change messageh, relay station switching time T in additionh, can also be carried in other message.
In PCID change message, the new sign C-RNTI for distributing to relay station can also be included, C-RNTI is 16bit sequence in the prior art, in one implementation, can the relay station be newly denoted as less than 16bit shortening rC-RNTI, for example can use lObit rC-RNTI.Relay station utilizes the related flow of scrambler in the rC-RNTI carry out systems of the shortening；In another implementation, serving BS is the rC-RNTI of one shortening less than 16bit of terminal distribution, and rC-RNTI that should be less than 16bit can correspond to 16bit C-RNTI, there are this mapping relations in relay station and base station.Obtain after the r-CRNTI that serving BS is assigned to, relay station obtains corresponding C-RNTI according to mapping relations, followed by the related flow of scrambler in the C-RNTI carry out systems.By the relay station number that can be disposed in the service range of a base station is small more than UE.Therefore the sign of less bit can be used to indicate relay station, can so ensures in idle message that expense is reduced, but not interfere with relay station or base station adopts the related flow of scrambler in LTE PHY.
S205:Optionally, relay station sends confirmation message to serving BS, for confirming to receive PCID changes.
Further, in addition to：Relay station notifies new PCID to give periphery neighbor cell.The step of relay station notifies new PCID to periphery neighbor cell specifically includes：
In a kind of mode, after it have changed the PCID of itself, change information can be notified to give neighbours peripheral cell by relay station by S1 or X2 message signaling, allow neighbor cell to update its respective neighbor cell lists；Higher level's website that relay can also be belonged to by it, is notified to give neighbours peripheral cell, allows neighbor cell to update its respective neighbor cell lists with X2 message signaling by higher level's website by information is changed.The change information can include：The new PCID of relay station;Change information can also include：In After the new PCID at station, the new working frequency that PCID is worked；In a further mode of operation, before the PCID of itself is changed, change information can be notified to give periphery neighbor cell by relay station by X2 message signaling, allow neighbor cell to update its respective neighbor cell lists；Higher level's website that relay station can also be belonged to by it, is notified to give neighbours peripheral cell, allows neighbor cell to update its respective neighbor cell lists with X2 message signaling by higher level's website by information is changed.The change information can include：The new PCID of relay station, changes the time；Change information can also include：The new working frequency that the new PCID of relay station, PCID are worked, changes the time.For above two mode, above-mentioned neighbours peripheral cell receive change information after, change information can be issued oneself adjacent area and its subordinate terminal.Issuing the adjacent area of oneself is used to avoid PCID from obscuring；Issued by broadcast and/or specific messages and send change information to use new PCID in measurement report to the terminal that the terminal of oneself subordinate is used for subordinate after changing the time.Its mode can be similar to the terminal that services sites notifies its subordinate.
S206:Relay station is interacted with its subordinate UEs, notifies its subordinate UEs to access the relay station using new PCID；
In one embodiment, the step can include procedure below：
6-1. relay stations send switching command to terminal, start routine LTE switching flows.
Terminal UE s by be switched to send new PCID former relay station under, the new PCID is exactly a target cell ID for UE.The switching command is the conventional switching command of LTE system, is included as the C-RNTI used after UE distribution switchings, the information such as PCID；
If time of the PCID change message packages containing new PCID and change PCID, then relay station can send switching command to terminal immediately after PCID change message is received, can also be after the t times after receiving PCID change message to terminal transmission switching command.In latter implementation mode, the opportunity t that relay station sends switching command can consider according to following two ways：
Because PCID replacing is in units of frame, the propagation delay time T1 and UE processing delay T2 that relay station sends switching command can be pre-estimated, an ancient weapon made of bamboo change PCID time is T, new PCID is used in order to ensure that UE implements relay station before switching, i.e., to meet t+Tl+T2 in time>T, relay station needs are rear to terminal transmission switching command Τ-(Τ 1+ Τ 2) moment；
In another case, terminal starts to start timer Τ 3, hand-off process is completed before timer Τ 3 expires, according to LTE protocol after the switching command of relay station is received（36.331), timer Τ 3 value can be selected from following sequence： {50ms, 100ms, 150 ms, 200ms, 500ms, 1000ms, 2000ms }, in this case, relay station can specify the value of a timer for terminal, use new PCID to ensure that UE implements relay station before switching, i.e., to meet+the T2+T3 of t+T 1 in time>T, relay station is rear to terminal transmission switching command the Τ-(+Τ 2+ Τ 3 of Τ 1) moment.
6-2.UES starts the synchronizing process with targeted sites after switching command is received；
6-3. targeted sites（Send new PCID former relay station）Responded to synchronous, including uplink assignment and timing advance；
6-4. terminals are successfully accessed to targeted sites.Send the handoff procedure that switch acknowledgment message indicates UE:Into.
S207:Relay station sends PCID change confirmation messages to serving BS, notifies its PCID is modified to complete, can start switching flow；
This step is optional step.Such as relay station can directly initiate switching flow after confirming that its affiliated terminal receives and completed new PCID changes, without sending PCID change confirmation messages to serving BS；In another example, that serving BS changes that confirmation message or other message informings relay station switches by PCID is time Th, then relay station can be indicated according to serving BS, in defined ThTarget cell is switched to, and PCID change confirmation messages need not be sent.
S208:Serving BS sends handover command messages, and to relay station, there is provided the information that relay station is switched to target BS；
This step is optional step, in another implementation, the handover information of relaying is contained in the switching request response that step S204 serving BSs are sent to relay station, serving BS can not send handover request message to relay station, relay station can be after PCID change confirmation messages be sent to serving BS, start switching flow, synchronized with target BS.
S209:Relay station starts switching flow, and process is synchronized with target BS, carries out access process；
S210:Relay station is successfully accessed to targeted sites.Send switch acknowledgment message and indicate that the handoff procedure of relay station is completed.
In the embodiment, before relay station is switched to target BS, serving BS there may be PCID with target BS negotiation confirmation and conflict, the moon, a new PCID was distributed in good business base station for relay station, relay station is switched on target BS again after enabling new PCID, it can in advance recognize and avoid PCID from conflicting, it is to avoid the interference in network switching. As shown in figure 3, in another implementation, step S306 relay stations are interacted with its subordinate terminal, notify its subordinate terminal to access the relay station using new PCID, can comprise the steps of：
S301 :Relay station sends the second indication message to terminal, and the relay station that it belongs to for instruction terminal is constant, but the PCID of relay station is changed, and does not perform switching flow.Configured information, new PCID are included in second indication message.Configured information represents that network switching need not be carried out.
Configured information represents that the relay station of terminal attaching is constant, it is not necessary to switch over.Configured information can be a clear and definite sign, and the information of such as one bit represents that network switching need not be carried out；Configured information can also be an implicit mark, and fresh information is carried for example with specific or special instruction message, imply and notify that its home service website of terminal is constant, it is not necessary to carry out network switching.
The second indication message can be included in second scheme：Configured information, new PCID and change time.For notifying terminal：Relay station will use new PCID when reaching the time of change.
S302:Terminal obtains configured information, new PCID from the second indication message;
Terminal knows that the relay station of ownership is constant according to configured information and new PCID, but relay station
PCID is changed, without network switching.
In second scheme, terminal obtains configured information from the second indication message, and new PCID changes the time.
S303:The information related to PCID is updated using new PCID；
Terminal knows that the services sites of terminal is constant according to configured information, but the PCID of services sites is changed, it is not necessary to carry out network switching.Terminal changes the content related to PCID, such as information related to PCID in scrambler generating process in system.
In second scheme, terminal changes information related to PCID in scrambler generating process in the content related to new PCID, such as system when reaching the time of change.
Other terminal can also be synchronized using the new PCID with former relay station.
Accordingly, relay station changes and sends new PCID;In another embodiment, relay station changes when reaching the time of change and sends the PCID of itself.Other relay station can also in altering system with
Information related PCID, such as generates new 4 outstanding yards of sequences using new PCID.
S304:Optionally, terminal sends UE PCID to relay station and changes confirmation message.
Terminal sends PCID change confirmation messages to relay station, for notifying relay station to confirm change flow. Without strict execution sequence between step S303 and step S304, it can perform in any order.In the embodiment, when serving BS is that relay station distributes a new PCID, relay station sends configured information to the terminal of its subordinate, indicate that the terminal of subordinate only changes PCID but without switching, optimize switching flow, improve switching efficiency, saved Internet resources.
In upper embodiment, when the PCID of relay station changes, relay station sends configured information to the terminal of its subordinate, indicates that the terminal of subordinate only changes PCID but without switching, optimizes switching flow, improve switching efficiency, saved Internet resources.
The second indication message referred in embodiments of the invention, in information sender formula, relay station can send second indication message to each terminal of subordinate, it would however also be possible to employ the mode of broadcast is to all terminal broadcasts of its subordinate second indication message.On the message design of the second indication message, a kind of new message can be designed, it would however also be possible to employ existing message carries the content of the second indication message.
^ mouthfuls of 1* row, for broadcast mode, can carry the content of the second indication message in the mobilityControlInformation in RRC connection reconfiguration message.Can be represented for the configured information in above-mentioned steps with 1 bit, when the bit be 0 be represent for instruction terminal its ownership relay station it is constant, but relay station PCID change, conventional switching flow is not performed；The bit is expressed as conventional switching when being 1.
For broadcast mode, the content of the second indication message can be carried using system information message.Specifically, can be realized using following two modes again：
(1) set time sends system information message situation
Relay station is after broadcast aging beep-page messages, and broadcast system information message system messages, to UEs, update for UEs system informations in the cycle at a fixed time.System message can be included：New PCID.System message can also be included：New PCID and change time.Because system message is not handover request, it is that service station in secret is constant that relay station, which sends the system message comprising PCID, but its PCID is to have changed.In another scheme, system message can also illustrate that service station is constant clearly comprising a configured information.In this case, system message can be included：New PCID, configured information.System message can also be included：New PCID, changes the time, configured information.For example, can represent that the relay station of its ownership is constant with a bit.
(2) NO Fixed Time sends system information message situation Relay station is when needing to send system information message, broadcast aging message beep-page messages first give its all subordinate UEs, the inside contains the time T of system information transmissions, notifies its all subordinate UEs relay station to broadcast system information message at the T moment.Relay station broadcasts system information message system messages to UEs in time T.System message can be included：New PCID.System message can also be included：New PCID and change time.Because system message is not handover request, it is that service station in secret is constant that relay station, which sends system message, but its PCID is to have changed.In another scheme, it can also illustrate that service station is constant clearly comprising a configured information in system message.In this case, system message can be included：New PCID, configured information.System message can also be included：New PCID, changes the time, configured information.For example, can represent that its relay station is constant with a bit.
Configured information represents that the relay station of terminal attaching is constant, it is not necessary to switch over.Configured information can be a clear and definite sign, and the information of such as one bit represents that network switching need not be carried out；Configured information can also be an implicit mark, and fresh information is carried for example with specific or special instruction message, imply and notify that its ownership relay station of terminal is constant, it is not necessary to carry out network switching.
With reference to Fig. 4, a kind of another embodiment of switching method of the invention, comprising：
S401 :Relay station sends the first handover request message to serving BS, wherein containing one or more candidate target base station of switching.
S402:Serving BS is made switching according to the first handover request message and determined, and is sent to target BS comprising negotiation message in handover request, the handover request, for conflicting with whether serving BS negotiation can have PCID；Negotiation message includes the PCID of relay station;
Serving BS is according to the first handover request message, with reference to situation about understanding between the measurement report, base station that relay station is reported, and makes switching and determines.If including multiple candidate target base stations in the first handover request message, serving BS according to circumstances selects one from multiple candidate target base stations and is used as target BS.
Serving BS sends the information needed in handover request, the handover request comprising target BS for switching preparation resource to target BS.
Serving BS through consultation with target BS consult by message, is switched to if understanding relay station after target BS, whether can have PCID conflicts in target BS.Serving BS can carry negotiation message in handover request, directly can also send negotiation message to target BS. Step S403 to S410 flow is similar with the flow of step S203 to S210 in previous embodiment, will not be described here.
In the embodiment, handover request is initiated by relay station, before target BS is switched to, serving BS there may be PCID with target BS negotiation confirmation and conflict, serving BS is that relay station distributes a new PCID, enable and be switched to again on target BS after new PCID in relay station, can in advance recognize and avoid PCID from conflicting, it is to avoid the interference in network switching.
As shown in figure 3, in another implementation, step S406 relay stations are interacted with its subordinate terminal, its subordinate terminal is notified to access the relay station using new PCID, the step of S301 to S304 being included.
With reference to Fig. 5, a kind of another embodiment of switching method of the invention, comprising：
S501 :Serving BS receives the measurement report that relay station is sent；
Relay station periodically or non-periodically to serving BS send measurement report, serving BS receive measurement report.
S502:Serving BS is made switching and determined, and is sent to target BS comprising negotiation message in handover request, the handover request, for conflicting with whether serving BS negotiation can have PCID；Negotiation message includes the PCID of relay station;
Serving BS determines whether relay station will switch according to measurement report and wireless resource management information, if to switch, and it is that switching prepares the information that resource needs that serving BS, which sends to target BS and target BS is included in handover request, the handover request,.
Serving BS through consultation with target BS consult by message, is switched to if understanding relay station after target BS, whether can have PCID conflicts in target BS.Serving BS can carry negotiation message in handover request, and realization is compatible with existing protocol, directly can also send negotiation message to target BS.
Frequency information is also included in the handover request message, frequency information can include first frequency, first frequency and second frequency can also be included, wherein first frequency is the frequency that relay station and terminal communication are used, second frequency is that relay station communicates the frequency used with serving BS.Certainly, serving BS can also individually use another a piece of news transmission frequency information.
S503:Target BS confirms that there may be PCID conflicts, and selects one or more PCID to be used for relaying in target BS, and sends switching request response to serving BS, and the handover request is rung Frequency information comprising PCID lists and change in answering, the PCID lists include at least one PCID;If target BS confirms to there may be PCID conflicts.Target BS recommends one or more PCID to be used for relay station in target BS to serving BS.Target BS can judge the possibility that there is conflict according to situations below：
A) exist in Target cell using the website with relay station original PCID identicals PCID；Or b) exist in Target cell and Target cell peripheral cell using and relay station original PCID identicals
PCID website.
According to conflict judged result, target BS provides a PCID list to serving BS, and the list can be the PCID set that target BS is recommended or target BS it is not recommended that the PCID set used.
If target BS confirms that the frequency that relay station is used is needed comprising a frequency modification information in change, switching request response, frequency modification information can be comprising at least one in new first frequency and new second frequency.Obviously, target BS can send PCID lists or frequency modification information using single message.
S504:Serving BS, according to PCID lists and the PCID service conditions of this cell, is that relay station distributes a new PCID, and is sent to relay station in PCID change message, PCID change message comprising new PCID, for notifying relay station to use new PCID.
Serving BS can distribute a new PCID for relay station in the following ways:A PCID, which is selected, as new PCID from PCID lists distributes to relay station；Or, it is that relay station distributes a new PCID different from all PCID in PCID lists.
In another scheme, the time that PCID changes message can be comprising new PCID and change PCID.For notifying relaying when reaching the time for changing PCID, to use new PCID.
Based on above two mode, serving BS can also include relay station switching time T in PCID change messageh, relay station switching time T in additionh, can also be carried in other message.
If target BS have changed first frequency or second frequency in step S503, serving BS needs to notify new first frequency, second frequency to relay station.New PCID and new first frequency or new second frequency are included in PCID change message.The PCID, which is changed, in a further mode of operation includes new PCID in message, change the time, and new first frequency or new second frequency.New first frequency is sent to relay station simultaneously in PCID change message, relay station carries out frequency range replacing before can switching, while can also saving signaling.In another implementation, serving BS can be to relaying Transmission first frequency of standing changes message, and new first frequency is sent into relay station.In this way, serving BS can be not limited to send first frequency change message in this step, and for example it can send first frequency change message after relay station switching, carry out frequency range replacing.
S505:Optionally, relay station sends confirmation message to serving BS, for confirming to receive PCID changes.
Further, in addition to：New PCID and new first frequency are notified to give periphery neighbor cell by relay station.
S506:Relay station is interacted with its subordinate UEs, notifies its subordinate UEs to access the relay station using new PCID；
In one embodiment, the step can include procedure below：
6-1. relay stations send switching command to terminal, start routine LTE switching flows.
Terminal UE s by be switched to send new PCID former relay station under, the signs of the new PCID for UE equivalent to a target BS.The switching command is the conventional switching command of LTE system, is included as the C-RNTI used after UE distribution switchings, the information such as PCID；If first frequency changes, in addition to new first frequency.
If PCID change message packages contain new PCID and change PCID time, relay station can send switching command to terminal immediately after PCID change message is received, can also be after the t times to terminal transmission switching command.Description of the acquisition of t times with reference to 6-1 steps in upper one embodiment.
6-2.UES starts the synchronizing process with targeted sites after switching command is received；
6-3. targeted sites（Send new PCID former relay station）Responded to synchronous, including uplink assignment and timing advance；
6-4. terminals are successfully accessed to targeted sites.Send the handoff procedure that switch acknowledgment message indicates UE:Into.
S507:Optionally, relay station sends PCID change confirmation messages to serving BS, notifies its PCID is modified to complete, can start switching flow；
S508:Serving BS sends handover request message, and to relay station, there is provided the information that relay station is switched to target BS；
This step is optional step, in another implementation, the handover information of relaying is contained in the switching request response that step S504 serving BSs are sent to relay station, serving BS can not be sent Handover request message can start switching flow, synchronized with target BS to relay station, relay station after PCID change confirmation messages are sent to serving BS.
S509:Relay station starts switching flow after receiving handover request message, synchronizes process with target BS, target BS is responded to synchronous, including uplink assignment and timing advance；
S510:Relay station is successfully accessed to targeted sites, sends switch acknowledgment message and indicates that the handoff procedure of relay station is completed.
In the embodiment, before relay station is switched to target BS, serving BS there may be PCID with target BS negotiation confirmation and conflict, serving BS is that relay station distributes a new PCID, enable and be switched to again on target BS after new PCID in relay station, it can in advance recognize and avoid PCID from conflicting, it is to avoid the interference in network switching.Further, target BS can change frequency used in relay station in the embodiment, and relay station can change used frequency before the handover or after switching.
Above-mentioned new first frequency and new second frequency can be the working frequency of carrier wave or the working frequency of multiple carrier waves.In particular for the lte-a system for applying carrier convergence, the working frequency of service station and terminal room can over a number of carriers, specifically above-mentioned new first frequency working frequency（The moon, good business was stood and terminal room）Can be frequency such as F1 (the i.e. center frequency points of the carrier wave of 1 carrier wave）Or the frequency of multiple carrier waves such as F3, F4 and F5.Above-mentioned new second frequency working frequency（For between relaying and base station）Can be frequency such as F1 (the i.e. center frequency points of the carrier wave of 1 carrier wave）Or the frequency of multiple carrier waves such as F3, F4 and F5.Carrier convergence (carriers aggregation) refers to two or more component carriers (partial carrier waves in LTE-A）It is gathered together, to support the transmission bandwidth more than 20MHz.According to its ability, terminal can receive one or more component carrier. LTE-A terminals simultaneously can be while receive multiple component carriers transmission, and LTE terminal can only then receive a component carriers.Relay station can simultaneously receive multiple component carriers transmission.
As shown in fig. 6, in another implementation, step S506 relay stations are interacted with its subordinate terminal, notify its subordinate terminal to access the relay station using new PCID, can comprise the steps of：
S601 :Relay station sends the second indication message to terminal, and the relay station that it belongs to for instruction terminal is constant, but the PCID of relay station and the first frequency fl of communication are changed, and do not perform switching flow.Configured information, new PCID and new first frequency are included in second indication message.Configured information represents that network switching need not be carried out.First frequency is the frequency communicated between relay station and terminal Rate.
The second indication message can be included in second scheme：Configured information, new PCID, new first frequency and change time.For notifying terminal：Relay station will use the new PCID of new first frequency transmission when reaching the time of change.
S602:Terminal obtains configured information, new PCID, new first frequency from the second indication message；
Terminal knows that the relay station of ownership is constant according to configured information, new PCID and new first frequency, but the PCID and communication frequency of relay station are changed, without network switching.
In second scheme, terminal obtains configured information, new PCID, new first frequency and change time from the second indication message.
S603:Update the information related to new PCID, new first frequency；
Terminal knows that the relay station of terminal is constant according to configured information, but the PCID of relay station is changed, it is not necessary to carry out network switching.Terminal changes the content related to PCID, such as information related to PCID in scrambler generating process in system；Using new first frequency more new search and reception PCID first frequency, to be synchronized with relay station.
In second scheme, terminal changes information related to PCID in scrambler generating process in the content related to new PCID, such as system when reaching the time of change；Using new first frequency more new search and reception PCID first frequency, to be synchronized with relay station.
Other terminal can also be synchronized using the new PCID, new first frequency and former relay station.Accordingly, relay station changes and sends new PCID;In another embodiment, relay station changes when reaching the time of change and sends the PCID of itself.Other relay station can also in altering system with
Information related PCID, such as generates new 4 outstanding yards of sequences using new PCID.
S604:Optionally, terminal sends UE-PCID change confirmation messages to relay station.
Without strict execution sequence between step S603 and step S604, it can perform in any order.In the embodiment, when the communication frequency of relay station PCID and relay station and terminal changes, relay station sends configured information to the terminal of its subordinate, indicate that the terminal of subordinate only changes PCID with communication frequency but without switching, optimize switching flow, switching efficiency is improved, Internet resources have been saved.
As shown in fig. 7, in another implementation, step S506 relay stations are interacted with its subordinate terminal, notify its subordinate terminal to access the relay station using new PCID, can comprise the steps of： S701 :Relay station sends the second indication message to terminal, and the relay station that it belongs to for instruction terminal is constant, but the PCID of relay station is changed, and does not perform switching flow.Configured information, new PCID are included in second indication message.Configured information represents that network switching need not be carried out.
The second indication message can be included in second scheme：Configured information, new PCID and change time.For notifying terminal：Relay station will use new PCID when reaching the time of change.
S702:Terminal obtains configured information, new PCID from the second indication message;
Terminal knows that the relay station of ownership is constant according to configured information and new PCID, but the PCID of relay station is changed, without network switching.
In second scheme, terminal obtains configured information from the second indication message, and new PCID changes the time.
S703:The information related to PCID is updated using new PCID；
Terminal knows that the relay station of terminal attaching is constant according to configured information, but the PCID of relay station is changed, it is not necessary to carry out network switching.Terminal changes the content related to PCID, such as information related to PCID in scrambler generating process in system.
In second scheme, terminal changes information related to PCID in scrambler generating process in the content related to new PCID, such as system when reaching the time of change.
Other terminal can also be synchronized using the new PCID with former relay station.
Accordingly, relay station changes and sends new PCID;In another embodiment, relay station changes when reaching the time of change and sends the PCID of itself.Other relay station can also the interior information related to PCID of altering system, such as new 4 outstanding yards of sequences of utilization new PCID generations.
S704:Terminal sends UE-PCID change confirmation messages to relay station.
S705:Relay station sends the 3rd indication message to terminal, and the relay station that it belongs to for instruction terminal is constant, but relay station and the first frequency fl of terminal communication are changed.Configured information and new first frequency are included in second indication message.Configured information represents that network switching need not be carried out.First frequency is the frequency communicated between relay station and terminal.
The 3rd indication message can be included in second scheme：Configured information, new first frequency and change time.For notifying terminal：Relay station will use new first frequency when reaching the time of change.
S706:Terminal obtains configured information, new first frequency from the 3rd indication message；Terminal knows that the relay station of ownership is constant according to configured information, new first frequency, but relay station with The communication frequency of terminal is changed, without network switching.
In second scheme, terminal obtains configured information, new first frequency and change time from the second indication message.
S707:The information related to first frequency is updated using new first frequency；
Terminal knows that the relay station of ownership is constant according to configured information, but is changed with relay station communication frequency, it is not necessary to carry out network switching, then first frequency is updated using new first frequency, to be synchronized with relay station.
In second scheme, terminal updates PCID first frequency using new first frequency when reaching the time of change.
Further, terminal uses new first frequency, is synchronized with relay station.
Terminal need not all parse PCID and synchronize per frame, and after first frequency change, terminal can be synchronized immediately, can also think to parse the PCID of relay station if necessary, synchronized with relay station.
S708：Terminal sends terminal frequency UE-F to relay station and changes confirmation message.
Obvious, the step in above-mentioned flow is not required for strict time order and function, in one embodiment can order execution S701 to step S706, relay station notifies new PCID and new fl to terminal；In another embodiment, step S704 can be first carried out to step S706 flow, relay station notifies new fl to terminal, then performs step S701 to step S703 flow, relay station notifies new PCID to terminal；Or new PCID and new fl can will be notified with parallel execution of steps S701 to step S703 flow and step S704 to step S706 flow to terminal.
In another embodiment, step S506 relay stations are interacted with its subordinate terminal, notify its subordinate terminal to access the relay station using new PCID, step S701 to step S703 flow can be included, further, in step 510:Relay station is successfully accessed to after targeted sites, in addition to step S704 is to step S706 flow.I.e. relay station can change the first frequency with terminal communication before target BS is switched to, and the second frequency with terminal communication can also be changed after target BS is switched to.
In the embodiment, when serving BS is that relay station distributes a new PCID, relay station sends configured information to the terminal of its subordinate, indicate that the terminal of subordinate only changes PCID but without switching, new first frequency information is notified to terminal using single message, optimize switching flow, improve switching efficiency, saved Internet resources.
With reference to Fig. 8, a kind of another embodiment of switching method of the invention, including： S801 :Relay station sends the first handover request message to serving BS, wherein containing one or more candidate target base station of switching.
S802:Serving BS is made switching according to the first handover request message and determined, and is sent to target BS comprising negotiation message in handover request, the handover request, for conflicting with whether serving BS negotiation can have PCID；Negotiation message includes the PCID of relay station;
Serving BS is according to the first handover request message, with reference to situation about understanding between the measurement report, base station that relay station is reported, and makes switching and determines.If including multiple candidate target base stations in the first handover request message, serving BS according to circumstances selects one from multiple candidate target base stations and is used as target BS.
Serving BS sends the information needed in handover request, the handover request comprising target BS for switching preparation resource to target BS.
Serving BS through consultation with target BS consult by message, is switched to if understanding relaying after target BS, whether can have PCID conflicts in target BS.Serving BS can carry negotiation message in handover request, and realization is compatible with existing protocol, directly can also send negotiation message to target BS.
Frequency information is also included in the handover request message, frequency information can include first frequency, first frequency and second frequency can also be included, wherein first frequency is the frequency that relay station and terminal communication are used, second frequency is that relay station communicates the frequency used with serving BS.Certainly, serving BS can also use a piece of news transmission frequency information.
Step S803 to S810 flow is similar with the flow of step S503 to S510 in upper one embodiment, will not be described here.
In the embodiment, before relay station is switched to target BS, serving BS there may be PCID with target BS negotiation confirmation and conflict, serving BS is that relay station distributes a new PCID, enable and be switched to again on target BS after new PCID at relay station station, it can in advance recognize and avoid PCID from conflicting, it is to avoid the interference in network switching.Further, target BS can change frequency used in relay station in the embodiment, and relay station can change used frequency before the handover or after switching.One of ordinary skill in the art will appreciate that realizing all or part of flow in above-described embodiment method, it can be by computer program to instruct the hardware of correlation to complete, described program can be stored In a computer read/write memory medium, the program is upon execution, it may include such as the flow of the embodiment of above-mentioned each method.Wherein, described storage medium can be magnetic disc, CD, read-only memory
( Read-Only Memory,
RAM) etc..The present invention also provides a kind of switching device embodiment, for recognizing and solving the mark conflict in network in advance when the relay station of its subordinate is switched to target BS.The switching device can be base station.When knowing that relay station needs to carry out network switching, the serving BS eNBl of relay station first confirms that whether the former PCID of relay station is identical with existing PCID in target BS；If the PCID that there is a relay station in target BS is identical with the former PCID for switching relay station, serving BS eNIB needs to distribute a new PCID for switching relay station;Relay station is switched to target BS after new PCID comes into force.
As shown in figure 9, a kind of one embodiment for base station that the present invention is provided, including：
Switch determining unit 901:Need to be switched to the decision of target BS for obtaining relay station；Transmitting element 902, for sending handover request to target BS, negotiation message is included in the handover request, for serving BS consult whether can PCID conflict；
The PCID lists of response negotiation message generation are included in receiving unit 903, the handoff response for receiving target BS, the switching request response；
Allocation unit 904, for being that relay station distributes a new PCID according to PCID lists;
Notification unit 905, includes new PCID, for notifying relay station to be switched to using new PCID in target BS for being sent to relay station in PCID change message, PCID change message.
In the embodiment, before relay station is switched to target BS, base station there may be PCID with target BS negotiation confirmation and conflict, base station is that relay station distributes a new PCID, relay station is switched on target BS again after enabling new PCID, it can in advance recognize and avoid PCID from conflicting, it is to avoid the interference in network switching.
As shown in Figure 10, one embodiment of the switching determining unit 901, including：Measurement report receiving unit 1001, the measurement report for receiving relay station；
Determining unit 1002, for determining that relay station needs to be switched to target BS according to measurement report and wireless resource management information.
As shown in figure 11, another embodiment of the switching determining unit 901, including： Handover request receiving unit 1101, the handover request message for receiving relay station, handover request message includes one or more candidate target base stations of switching；
Determining means 1102, is determined for making switching according to the first handover request, and one target BS of selection from candidate target base station.
In another embodiment, also include in the handover request：Frequency information；Also include in switching request response：New frequency information；The notification unit is additionally operable to change message to relay station transmission frequency, and frequency change message package contains new frequency information.
As shown in figure 12, another embodiment for a kind of base station that the present invention is provided, including：Switch determining unit 1201:Need to be switched to the decision of target BS for obtaining relay station；Transmitting element 1202, negotiation message is included for being sent to target BS in handover request, the handover request, for conflicting with whether serving BS negotiation can have PCID；
The PCID lists of response negotiation message generation are included in receiving unit 1203, the handoff response for receiving target BS, the switching request response；
Allocation unit 1204, for being that relay station distributes a new PCID according to PCID lists;
Notification unit 1205, includes new PCID, for notifying relay station to be switched to using new PCID in target BS for being sent to relay station in PCID change message, PCID change message
Confirm receiving unit 1206, the PCID for receiving relay station transmission changes confirmation message；Information transmitting unit 1207, for the information for being switched to target BS to be sent into relay station.In the embodiment, before relay station is switched to target BS, base station there may be PCID with target BS negotiation confirmation and conflict, and base station is that relay station distributes a new PCID, and relay station enables new
It is switched to again on target BS after PCID, can in advance recognizes and avoid PCID from conflicting, it is to avoid the interference in network switching.In a word, the foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the scope of the present invention.Within the spirit and principles of the invention, any modification, equivalent substitution and improvements made etc., should be included in the scope of the protection.

Claims (1)

  1. Claims
    1st, a kind of switching method, including：
    Obtaining relay station needs to be switched to the decision of target BS；
    Sent to target BS and negotiation message is included in handover request, the handover request, for conflicting with whether target BS negotiation can have PCID；
    The PCID lists that response negotiation message generation is included in the handoff response of target BS, the switching request response are received, the PCID lists include at least one PCID;
    It is that relay station distributes a new PCID according to PCID lists, and PCID change message is sent to relay station, the PCID, which is changed, includes new PCID in message, for notifying relay station to be switched to using new PCID in target BS.
    2nd, according to the method described in claim 1, it is characterised in that obtaining relay station needs the decision for being switched to target BS to include：
    Receive the measurement report of relay station；
    Determine that relay station needs to be switched to target BS according to measurement report and wireless resource management information.
    3rd, according to the method described in claim 1, it is characterised in that obtaining relay station needs the decision for being switched to target BS to include：
    The first handover request message of relay station is received, the first handover request message includes one or more candidate target base station lists of switching；
    Switching is made according to the first handover request to determine, and one target BS of selection from candidate target base station.
    4th, according to the method described in claim 1, it is characterised in that also include in the handover request：Frequency information；Also include in switching request response：New frequency information；Methods described also includes：
    Message is changed to relay station transmission frequency, frequency change message package contains new frequency information.
    5th, according to the method described in claim 1, it is characterised in that also include：
    Receive the PCID change confirmation messages that relay station is sent；
    Sending handover command messages, there is provided the information that relay station is switched to target BS to relay station.
    6th, according to the method described in claim 1, it is characterised in that according to PCID lists be relay station distribute a new PCID, including： A PCID is selected to be used as new PCID from PCID lists；Or
    A new PCID different from PCID in PCID lists is distributed for relay station.
    7th, according to the method described in claim 1, it is characterised in that also include：Relay station is interacted with its subordinate terminal, notifies its subordinate terminal to access the relay station using new PCID.
    8th, method according to claim 7, it is characterised in that relay station is interacted with its subordinate terminal, notifies its subordinate terminal to access the relay station using new PCID, including：
    Relay station sends the second indication message to terminal, changes PCID for instruction terminal but does not perform comprising configured information in switching flow, second indication message, new PCID, the configured information represents that the services sites of ownership is constant；
    Relay station sends new PCID, and terminal is synchronous with relay station using new PCID；
    The PCID changes that receiving terminal is sent confirm.
    9th, method according to claim 7, it is characterised in that relay station is interacted with its subordinate terminal, notifies its subordinate terminal to access the relay station using new PCID, including：
    Relay station sends the second indication message to terminal, change PCID for instruction terminal but do not perform and configured information, new PCID are included in switching flow, second indication message, new first frequency, the configured information represents that the services sites of ownership is constant；
    Relay station sends new PCID in new first frequency, and terminal is synchronous with relay station using new PCID；The PCID changes that receiving terminal is sent confirm.
    10th, method according to claim 9, it is characterised in that also include：New PCID and new first frequency notify to give periphery neighbor cell by relay station, allows neighbor cell to update its respective neighbor cell lists.
    11st, according to the method described in claim 1, it is characterised in that also include：
    Relay station notifies new PCID to give neighbours peripheral cell, allows neighbor cell to update its respective neighbor cell lists.
    12nd, a kind of base station, it is characterised in that including：
    Switch determining unit：Need to be switched to the decision of target BS for obtaining relay station；Transmitting element, negotiation message is included for being sent to target BS in handover request, the handover request, for conflicting with whether serving BS negotiation can have PCID；
    Sound is included in receiving unit, the handoff response for receiving target BS, the switching request response The PCID lists for answering negotiation message to generate, the PCID lists include at least one PCID;
    Allocation unit, for being that relay station distributes a new PCID according to PCID lists;
    Notification unit, includes new PCID, for notifying relay station to be switched to using new PCID in target BS for being sent to relay station in PCID change message, PCID change message.
    13rd, base station according to claim 12, it is characterised in that the switching determining unit includes：
    Measurement report receiving unit, the measurement report for receiving relay station；
    Determining unit, for determining that relay station needs to be switched to target BS according to measurement report and wireless resource management information.
    14th, base station according to claim 12, it is characterised in that the switching determining unit includes：
    Handover request receiving unit, the first handover request message for receiving relay station, the first handover request message includes one or more candidate target base stations of switching；
    Determining means, is determined for making switching according to the first handover request, and one target BS of selection from candidate target base station.
    15th, base station according to claim 12, it is characterised in that also include in the handover request：Frequency information；Also include in switching request response：New frequency information；The notification unit is additionally operable to change message to relay station transmission frequency, and frequency change message package contains new frequency information.
    16th, base station according to claim 12, it is characterised in that also include：
    Confirm receiving unit, the PCID for receiving relay station transmission changes confirmation message；Information transmitting unit, for the information for being switched to target BS to be sent into relay station.
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CN106332148A (en) * 2015-06-23 2017-01-11 中兴通讯股份有限公司 Base station networking method and apparatus
CN106332148B (en) * 2015-06-23 2020-04-03 中兴通讯股份有限公司 Base station networking method and device
CN106470456A (en) * 2015-08-14 2017-03-01 电信科学技术研究院 A kind of method and terminal carrying out relay selection in network termination
CN106470456B (en) * 2015-08-14 2019-09-17 电信科学技术研究院 A kind of method and terminal carrying out relay selection in network termination

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