CN102892162B - Host base station, relay node device and method for strengthening route switch - Google Patents
Host base station, relay node device and method for strengthening route switch Download PDFInfo
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- CN102892162B CN102892162B CN201110203989.2A CN201110203989A CN102892162B CN 102892162 B CN102892162 B CN 102892162B CN 201110203989 A CN201110203989 A CN 201110203989A CN 102892162 B CN102892162 B CN 102892162B
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- 238000000034 method Methods 0.000 title claims abstract description 45
- 238000005728 strengthening Methods 0.000 title abstract description 4
- 230000009466 transformation Effects 0.000 claims description 41
- 230000010354 integration Effects 0.000 claims description 33
- 230000008859 change Effects 0.000 claims description 19
- 230000005540 biological transmission Effects 0.000 claims description 16
- 230000037361 pathway Effects 0.000 claims description 16
- 238000006243 chemical reaction Methods 0.000 claims description 15
- 230000008569 process Effects 0.000 claims description 15
- 230000026683 transduction Effects 0.000 claims description 15
- 238000010361 transduction Methods 0.000 claims description 15
- 238000004891 communication Methods 0.000 abstract description 7
- JZEPSDIWGBJOEH-UHFFFAOYSA-N 4-decylbicyclo[2.2.1]hept-2-ene Chemical compound C1CC2C=CC1(CCCCCCCCCC)C2 JZEPSDIWGBJOEH-UHFFFAOYSA-N 0.000 description 106
- 238000011144 upstream manufacturing Methods 0.000 description 8
- 239000003550 marker Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 230000006870 function Effects 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 241001269238 Data Species 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
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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
- H04W36/0055—Transmission or use of information for re-establishing the radio link
- H04W36/0058—Transmission of hand-off measurement information, e.g. measurement reports
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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
- H04W36/0055—Transmission or use of information for re-establishing the radio link
- H04W36/0064—Transmission or use of information for re-establishing the radio link of control information between different access points
-
- 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
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- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The invention discloses a host base station, a relay node device and a method for strengthening route switch, belonging to the technical field of wireless communication. The method comprises the following steps: when RN (relay node) is switched to be accessed to a new host base station, the RN or the target host base station transmits the down bearing information which is to be transformed from the user equipment still in the RN cell to MME (mobile management entity) of UE, so as to request the MME to convert down data tunnel endpoint for UE (user equipment). In the technical scheme, when the host base station of RN is changed, the down data route is transformed for the UE still in RN cell and updated correspondingly, so that even the RN leaves the source base station and is accessed to the target base station through a switch program, the RN still can provide normal communication service for the UE.
Description
Technical field
The present invention relates to wireless communication technology field, more particularly to a kind of host base station, relay node equipment and for user
The method that equipment (User Equipment, UE) changes downstream data paths.
Background technology
In mobile communication system, eNB (evolved NodeB, evolved base station) is according to wireless environment or cell load
Situations such as, it may be necessary to certain (a little) UE (s) is switched to certain cell under other base stations, so that the UE obtains preferably clothes
Business.Internodal data transmission flow direction during handoff procedure and switching is as shown in Figure 1.
Step 101：If source base station determines to switch to certain eNB (target BS) according to the measurement reported result of UE
Under certain cell (Target cell), then source base station to target BS sends handover request message notifying to be accounted for needed for the UE to it
Resource situation, associated core network element (as Mobility Management Entity (Mobility Management Entity,
MME), the information such as gateway (Serving Gateway, S-GW), target BS decides whether that the UE can be received simultaneously accordingly
Reply switching request acknowledgement message.This part of flow process is referred to as the handoff preparation phase in changeover program, now upper between node
Downlink data is still transmitted according to the normal flow direction before switching.
Step 102：If target BS has received the UE, then in handover execution stage, the source base station order UE from
Increase income cell, access Target cell.During this period, because also not updating change of UE serving BSs etc. to the core network element of UE
Handover information, so the downlink data packet sent by P-GW/S-GW still reaches source base station, source base station is again by the data for receiving
Bag is transmitted to target BS, it is to avoid the loss of packet.For upstream data, if UE has accessed Target cell, UE is
Upstream data bag can be sent directly to target BS, then be sent to S-GW/P-GW by target BS.
Step 103：Complete the stage in switching, MME transmitting path convert requests (PATH of the target BS to the UE associations
SWITCH REQUEST) message, so as to notify (the i.e. target BS of the new downlink data tunnel terminal point information after UE switchings to it
Mark), MME further sends to the S-GW of UE association and carries amendment request (MODIFY BEARER REQUEST) message
Carry out the renewal of notification path.(may relate to the renewal of some carryings of P-GW sides) after S-GW transduction pathway can send eventually to source base station
Only accord with (End marker) to notify that it need not again to target BS converting downlink packet, because now S-GW can be by
Downlink data packet is transmitted directly to target BS.Target BS will be from S- by receiving after the End marker that source base station forwarding comes
The downlink data packet that GW sends is sent to UE (ensure that the order of downlink data packet).The last of stage, mesh are completed in switching
Mark base station notifies that source base station discharges the context of the UE.
It should be noted that this part of flow process related to S-GW in switching the stage that completes refers to the constant feelings of S-GW
Flow process under condition.If S-GW changes, MME will order new S-GW to set up the information (Create such as mark of UE relevant bearers
Session), and new S-GW will not send End marker to source base station, simply directly send to target BS and obtained from P-GW
The packet for taking.Whether S-GW changes is determined by MME.
In addition, wireless relay (Wireless Relay) technology is senior long term evolution (Long-Term Evolution
One of advance, LTE-Advanced) technology in standard, it is intended to the coverage of Extended Cell, the dead angle reduced in communication
The transmission power of area, balanced load, the business of transfer hot zones and saving UE.As shown in Fig. 2 RN (via node) is to connect
The UE for entering its cell provides the function similar with common eNB and service, and the wave point between RN and UE is referred to as " access link "
(Access Link), also referred to as Uu mouths；And RN also accesses one and serves by way of wave point is with similar to common UE
Its eNB, the eNB are referred to as host base station (Donor eNB, DeNB), and the wave point between RN and DeNB is referred to as " return link "
(Backhaul Link), also referred to as Un mouths.
The network architecture and interface of RN is supported as shown in Fig. 2 DeNB is in RN and other network elements (other eNB, MMEs and S-
GWs S1, X2 interface agent functionality are provided between), this function refers to the special S1/X2 letters of UE of the correspondence in RN service areas
Make the S1/X2 packets between message and RN (UE) and other network elements all arrive first at DeNB, changed after the mark of message by DeNB
Relay to the UE of RN or RN services.Because this agent functionality of DeNB, DeNB is regarded as and is connect with itself there is S1 chains of command by RN
Mouthful MME, have the adjacent eNB of X2 interface and have the S-GW of S1 interfaces in the user plane.In fact, being all located at the gateway of common UE
Unlike core net, the gateway of RN is exactly local S-GW and packet data network gateway (the Packet Data being located in DeNB
Network Gate Way, P-GW).Therefore, according to RN frameworks and Routing Protocol, certain need to be sent to and resides in RN cells (clothes
Business cell) UE downlink data packet, be that the P-GW/S-GW of RN (be located at DeNB in) is sent to by the P-GW/S-GW of UE, by
DeNB to change and be sent to RN on wireless links again after corresponding Endpoint ID, is finally sent to UE's with base station identity by RN.
The transmitting uplink data of UE is similar, i.e., be sent to RN by UE, and RN is sent on wireless links DeNB, then Jing DeNB change
The S-GW/P-GW of UE is sent to after corresponding Endpoint ID.
During RN provides the service as ordinary base station for the UE that resides in RN cells, movement if as RN or
The original such as network design is so that RN Jing changeover programs have changed host base station (having accessed target BS), then RN's is local
Gateway is changed also with host base station, i.e. RN has been associated with after handover the S-GW/P-GW of target BS side.In RN switchings
Switching in program is completed the stage, and the S-GW/P-GW pathways footpath flow path switch in the MME and target BS of RN would know that the place of RN
The renewal (i.e. the renewal of downlink data tunnel end points) of dominant base.But, the UE that RN is serviced still reside in RN cells without
Switch over, namely update without the path integration in changeover program and user plane bearer, then the P-GW/S-GW of these UE is still
So downlink data packet is sent to into source DeNB.And after RN handover execution stages (leave source base station, access target BS), RN
With the disconnecting of source base station；X2 forwarding interfaces after the path integration flow process of RN terminates, between source base station and target BS
It is released, that is to say, that after the completion of RN switchings, will not be reentried downlink data packet, i.e. downlink data transmission by the UE that RN is serviced
Interruption, system cannot provide normal service for UE again.
The content of the invention
The technical problem to be solved is to provide a kind of host base station, relay node equipment and strengthens path and turns
The method and system changed so that when the host base station of RN is changed, normal Communications service can be provided for UE.
In order to solve the above problems, the invention discloses a kind of method for strengthening path integration, including：
Jing after switching is linked into new host base station, the RN or target host base station will be still resident via node RN
The downlink bearing information of transformation is needed in the user equipment of RN cells, the Mobility Management Entity of the user equipment is sent to
MME, to ask the MME to change downlink data tunnel terminal as the user equipment.
It is preferred that in said method, the RN or target host base station will be described descending by path switching request information
Carrying information is sent to the MME of the user equipment.
It is preferred that in said method, user equipment is carried in the path switching request information in target host base station
In S1 interface identifier, the former S1 interface identifier in its MME of downlink bearing information and user equipment of request transduction pathway, its
In, asking the downlink bearing information of transduction pathway includes carrying mark and transmission Tunnel End Point Identifier.
It is preferred that in said method, the MME of multiple user equipmenies is in the user equipment for still residing at RN cells
During same MME, this multiple user equipment is needed by same path switching request information for the downlink bearing information of transformation
It is sent to the MME.
It is preferred that in said method, the user equipment for still residing at RN cells is needed to turn by the target host base station
The downlink bearing information of change, the process for being sent to the MME of the user equipment is as follows：
The target host base station will still reside at the user equipment of RN cells after the completion of the path integration of the RN
The downlink bearing information of transformation is needed, the MME of the user equipment is sent to；Or
The target host base station will still reside at RN cells while the MME request paths to the RN are changed
User equipment need transformation downlink bearing information, be sent to the MME of the user equipment.
It is preferred that in said method, it is described if the MME of the MME of the RN and the user equipment is same MME
Target host base station, will still by same path switching request information while the MME request paths to the RN are changed
So residing in the user equipment of RN cells needs the downlink bearing information and the RN of transformation to need the downlink bearing letter of transformation
Breath, is sent to the MME of the user equipment and the RN.
It is preferred that in said method, the user equipment for still residing at RN cells is needed the descending of transformation to hold by the RN
Information carrying ceases, and the process for being sent to the MME of the user equipment is as follows：
The RN obtains the MME of the user equipment for still residing at RN cells from target host base station, by the user
Equipment needs the downlink bearing information of transformation to be sent to the MME of user equipment.
It is preferred that in said method, the RN is after the path integration success of itself, or is successfully accessed target host base
After standing, the user equipment for still residing at RN cells is needed into the downlink bearing information of transformation, be sent to the user equipment
MME。
The invention also discloses a kind of host base station, including：
First module, when via node RN Jing switch and are linked into this host base station, to the MME request paths of the RN
Conversion, and determine whether the path integration of the RN completes；
Second unit, after the MME request paths conversion to the RN, or after the completion of the path integration of RN, will still
Residing in the user equipment of RN cells needs the downlink bearing information of transformation, is sent to the MME of the user equipment.
It is preferred that in above-mentioned base station, the second unit, by path switching request information by the downlink bearing information
It is sent to the MME of the user equipment.
It is preferred that in above-mentioned base station, user equipment is carried in the path switching request information in target host base station
In S1 interface identifier, the former S1 interface identifier in its MME of downlink bearing information and user equipment of request transduction pathway, its
In, asking the downlink bearing information of transduction pathway includes carrying mark and transmission Tunnel End Point Identifier.
It is preferred that in above-mentioned base station, as the MME of multiple user equipmenies in the user equipment for still residing at RN cells
For same MME when, the second unit, by same path switching request information by this multiple user equipment need transformation
Downlink bearing information be sent to the MME.
It is preferred that in above-mentioned base station, when the MME and the MME of the user equipment for still residing at RN cells of the RN are same
During one MME, the user equipment is needed the descending of transformation by the second unit by same path switching request information
Carrying information and the RN need the downlink bearing information of transformation to be sent to the MME.
The invention also discloses a kind of via node RN equipment, including：
First module, in this RN equipment Jing after switching is linked into new host base station, obtains from target host base station
Still reside at the MME of the user equipment of RN cells；
Second unit, needs the downlink bearing information of transformation to be sent to user the user equipment for still residing at RN cells
The MME of equipment.
It is preferred that in the said equipment, the second unit, by path switching request information by the downlink bearing information
It is sent to the MME of the user equipment.
It is preferred that in the said equipment, user equipment is carried in the path switching request information in target host base station
In S1 interface identifier, the former S1 interface identifier in its MME of downlink bearing information and user equipment of request transduction pathway, its
In, asking the downlink bearing information of transduction pathway includes carrying mark and transmission Tunnel End Point Identifier.
It is preferred that in the said equipment, as the MME of multiple user equipmenies in the user equipment for still residing at RN cells
For same MME when, the second unit, by same path switching request information by this multiple user equipment need transformation
Downlink bearing information be sent to the MME.
Technical scheme, when the host base station of RN is changed, is the UE conversion downlink datas road for still residing in RN cells
Footpath simultaneously carries out accordingly bearer update, so that RN is Jing after changeover program leaves source base station, accesses target BS, still
Normal Communications service can be provided for UE.
Description of the drawings
Fig. 1 is the schematic diagram of UE switching flows；
Fig. 2 is the framework and interface diagram that RN is deployed in network；
Fig. 3 is to carry out the schematic flow sheet of enhancing path integration by RN in the present invention；
Fig. 4 is to carry out the schematic flow sheet of enhancing path integration by DeNB in the present invention.
Specific embodiment
In order that the object, technical solutions and advantages of the present invention become more apparent, below in conjunction with accompanying drawing to the present invention
Technical scheme is described in further detail.It should be noted that in the case where not conflicting, embodiments herein and embodiment
In feature can arbitrarily be mutually combined.
Embodiment 1
The present embodiment provide it is a kind of strengthen path integration method, its RN switching host base station after, by RN or its switching
The user equipment for still residing at RN cells is needed the downlink bearing information of transformation for target host base station afterwards, is sent to user
The Mobility Management Entity MME of equipment, to ask MME to change downlink data tunnel terminal as user equipment.I.e. by target DeNB
Or RN is that the UE conversion downlink paths and corresponding carrying information for still residing in RN cells is set up or updated.
Wherein, RN or target host base station can message will still by path integration request (PATH SWITCH REQUEST)
So residing in the user equipment of RN cells needs the downlink bearing information of transformation to be sent to its MME.Specifically, PATH
The information included at least in SWITCH REQUEST message has S1 interface identifier (eNB UEs of the UE in target host base station
S1AP ID), need by transduction pathway downlink bearing information (E-RABs Switched in Downlink Item Ies, bag
Include and carry mark, transmission Tunnel End Point Identifier) and S1 interface identifier (Source MME UE S1APs of the UE in its MME
ID)。
When being that UE requests carry out path integration by RN, RN can obtain the actual MME positioned at core net of UE from DeNB, from
And by sending PATH SWITCH REQUEST message (needing the forwarding of Jing targets DeNB) being serviced by RN to the MME and
UE (still residing at the UE of RN cells) the request path conversion received by target DeNB.This request can be on the road of RN itself
Carry out after the conversion success of footpath, it is also possible to carry out immediately after RN is successfully accessed target BS.
And in preferred version, its information can be incorporated in a PATH SWITCH REQUEST by the UE under same MME, RN
Send to this in message (mark of multiple UE now, is carried in this piece of news and radio bearer list of conversion etc. is needed)
MME (is specifically first sent to the message up to target DeNB, the MME of UE is then forwarded to by target DeNB), to ask MME pair
UE under this MME carries out path integration.Treat that MME and gateway corresponding with these nodes complete path integration and carrying information more
After new or foundation, return information can be also incorporated in a PATH SWITCH REQUEST ACK message and feed back to RN by MME
(needing also exist for the forwarding of target DeNB).
Above-mentioned RN is described below and asks to carry out the detailed process of path integration for UE, the process is as shown in figure 3, including as follows
Step：
Step 301：During RN provides service as base station for UE, inter-node transmission up-downgoing packet.For example, on
Row packet is to be sent to source DeNB by RN, (i.e. actual S-GW, P- via the RN inside DeNB after the forwarding of source DeNB
GW have modified the Endpoint ID of up carrying) reach the S-GW (/P-GW) that UE is located at core net.
The reasons such as movement or network design based on RN, source base station may need order RN to be switched to the target of target DeNB
Cell.Handoff preparation phase in RN changeover programs, source DeNB can by handover request message to target DeNB notify RN and
RN service UE contextual information, thus target DeNB obtain receive these nodes required for set up carrying mark letter
The information such as breath, each node corresponding MME and S-GW.Based on these information, target DeNB is it is determined whether the switching (bag of access RN
Include all or part of UE of RN services).
Step 302：Target DeNB is received after the part or all of UE of RN and RN services, and source DeNB order RN perform switching,
Leave cell-of-origin, access Target cell, RN is successfully accessed after Target cell the wireless S1 connections that can be set up and between target DeNB,
Now can be described as the execution stage for switching；
Hereafter, the upstream data bag of UE can be sent to target DeNB by RN；But it is now placed in the S- in target DeNB
GW not yet sets up the information (i.e. the MME of RN not yet notifies it access of RN) such as the carrying mark related with RN to P-GW, therefore
The upstream data bag for receiving can only be transmitted to former S-GW and P-GW in the DeNB of source by target DeNB on X2 mouths, finally by
Former P-GW modifications carry the S-GW that UE is sent to after Endpoint ID positioned at core net.
During the switching of RN (and after the completion of switching), the UE of RN services is resided in all the time in RN cells, i.e. these UE are simultaneously
Do not switch over, but actually these UE are entered in the service area of target DeNB with the switching of RN.And it is now right
For downlink data, the S-GW of UE does not know that UE is linked into target DeNB and (does not update indirectly with the switching of RN
The terminal point information of downlink data tunnel), thus the S-GW will the downlink data packet of UE be sent to source DeNB, source DeNB with mesh
Target DeNB is transmitted on X2 interface between mark DeNB, then RN is sent on wireless links by target DeNB, finally reach UE.
Step 303：Complete the stage in the switching of RN, target DeNB sends PATH SWITCH REQUEST and disappears to the MME of RN
Cease to notify that RN has changed serving BS to it.
Because the gateway of RN is the local gateway being located in serving BS, that is to say, that after Target cell is accessed, RN's
S-GW, P-GW should change S-GW and P-GW in target DeNB.Therefore, in path integration flow process, the MME of RN is notified that
New local gateway sets up the information such as the related carrying marks of RN.After the connection establishment of the local gateway in target DeNB, UE's
Upstream data bag just directly can be sent to S-GWs of the UE positioned at core net by target DeNB.Path integration and user plane link
After being updated successfully, the MME of RN replys PATH SWITCH REQUEST ACK messages to target DeNB.
Step 304：Prepare and perform stage, the known UE switched to RN in the range of own services of target DeNB in switching
And the relevant information (information such as MME, S-GW corresponding to carrying identification information and each UE i.e. described in step 301) of UE, then
Complete the stage in the switching of RN, target DeNB to the MME of UE sends PATH SWITCH REQUEST message to notify downlink data
The change (the really change of the P-GW of RN, i.e. host base station) of endpoint of a tunnel information.The MME of UE to be received and notify UE after the message
S-GW correct the descending end points (Modify Bearer) of corresponding bearing tunnel.
Wherein, whether the S-GW of UE needs change to be determined that, if S-GW is unchanged, it is further to source by the MME of UE
DeNB sends full stop (End marker) to notify that it need not forward packet to target DeNB again；If S-GW changes,
The selected new S-GW of MME orders sets up the information such as the related carrying marks of the UE.The S-GW of UE updates or sets up descending biography
Just packet can be sent directly to target DeNB after defeated endpoint of a tunnel information, target DeNB further exists packet
RN is sent on wireless link, finally UE is transferred to by RN.The MME of UE to target DeNB replys PATH SWITCH REQUEST
ACK message is changed with notification path and the renewal of user plane link is completed.
It should be noted that in said process, the message transmission between the MME of all RN and UE is required for through target DeNB
Transparent transmission reaching real destination (MME of RN or UE).
When being that UE requests carry out path integration by target DeNB, target DeNB can first send the PATH of correspondence RN
The MME of SWITCH REQUEST message to RN, retransmit after the completion of the path integration for treating RN correspondence RN service and by target
The MME of the PATH SWITCH REQUEST message to UE of the UE (still residing at the UE of RN cells) that DeNB is received.Or,
While target DeNB can send the MME of the PATH SWITCH REQUEST message to RN of correspondence RN, correspondence RN services are sent
And the PATH SWITCH REQUEST message of UE (still residing at the UE of RN cells) received by target DeNB to UE
MME.
In preferred version, target DeNB sends that correspondence RN is serviced and (is still resided at by the UE that target DeNB is received
The UE of RN cells) PATH SWITCH REQUEST message to UE MME when, if the MME of multiple UE be same MME, for
Save resources, can send the MME of a PATH SWITCH REQUEST to this multiple UE, to ask MME to this multiple UE
Conversion downlink data tunnel terminal.Similarly, to the RN and UE under same MME, target DeNB also can be by its information (i.e. UE needs
The downlink bearing information of transformation and RN need the downlink bearing information of transformation) it is incorporated in a PATH SWITCH REQUEST and disappears
The MME is sent in breath, is asked to the RN and UE conversion downlink data tunnel terminals.Treat MME and net corresponding with these nodes
Pass is completed after the renewal or foundation of path integration and carrying information, and return information can be also incorporated in a PATH SWITCH by MME
Target DeNB is fed back in REQUEST ACK messages.
Above-mentioned DeNB is described below and asks to carry out the detailed process of path integration for UE, the process is as shown in figure 4, including such as
Lower step：
Step 401：During RN provides service as base station for UE, inter-node transmission up-downgoing packet.For example, on
Row packet is to be sent to source DeNB by RN, (as it was previously stated, actual via the RN's inside DeNB after the forwarding of source DeNB
S-GW, P-GW have modified the Endpoint ID of up carrying) reach the S-GW (/P-GW) that UE is located at core net.
The reasons such as movement or network design based on RN, source base station may need order RN to be switched to the target of target DeNB
Cell.Handoff preparation phase in RN changeover programs, source DeNB can by handover request message to target DeNB notify RN and
The contextual information of the UE of RN services, thus target DeNB obtain and receive the carrying information, each set up required for these nodes
The information such as node corresponding MME and S-GW.Based on these information, target DeNB is it is determined whether the switching of access RN is (including RN
All or part of UE of service).
Step 402：Target DeNB is received after the part or all of UE of RN and RN services, and source DeNB order RN perform switching,
Leave cell-of-origin, access Target cell, RN is successfully accessed after Target cell the wireless S1 connections that can be set up and between target DeNB；
Hereafter, the upstream data bag of UE can be sent to target DeNB by RN；But it is now placed in the S- in target DeNB
GW not yet sets up related carryings mark (i.e. the MME of RN not yet notifies it access of RN) of RN, therefore target DeNB to P-GW
The upstream data bag for receiving can only be sent to former S-GW and P-GW in the DeNB of source, finally bearing end be changed by former P-GW
S-GWs of the UE positioned at core net is sent to after point identification.
During the switching of RN and after the completion of switching, the UE of RN services is resided in all the time in RN cells, i.e. these UE are not
Switch over, but actually these UE are entered in the service area of target DeNB with the switching of RN.And at this point for
For downlink data, the S-GW of UE does not know that UE is linked into target DeNB (under not updating indirectly with the switching of RN
The terminal point information of row data tunnel), thus the S-GW will the downlink data packet of UE be sent to source DeNB and (really first reach source
P-GW in DeNB), source DeNB is transmitted to target DeNB on the X2 interface with target DeNB, then by target DeNB in radio chains
RN is sent on road, UE is finally reached.
Step 403：Complete the stage in the switching of RN, target DeNB sends PATH SWITCH REQUEST and disappears to the MME of RN
Cease to notify that RN has changed serving BS to it；
Because the gateway of RN is the local gateway being located in serving BS, that is to say, that after Target cell is accessed, RN's
S-GW, P-GW should change S-GW and P-GW in target DeNB.Therefore, in path integration flow process, the MME of RN is notified that
New local gateway sets up the information such as the related carrying marks of RN.After the connection establishment of the local gateway in target DeNB, UE's
Upstream data bag just directly can be sent to S-GWs of the UE positioned at core net by target DeNB.Path integration and user plane link
After being updated successfully, the MME of RN replys PATH SWITCH REQUEST ACK messages to target DeNB.
Step 404：After being successfully accessed target DeNB and establishing wireless S1 connections therewith, RN can be to be connect by target DeNB
(RN can be obtained or obtained simultaneously when UE accesses RN the MME of the UE transmission PATH SWITCH REQUEST message to UE received from DeNB
The identification information of the MME is preserved, likewise, other necessary informations passed in PATH SWITCH REQUEST message are also all
Obtained by RN when UE is initially accessed RN), so as to notify change (the really RN of the downlink data tunnel terminal point information of UE to it
P-GW, the i.e. change of host base station).The MME of UE is received and is notified that the S-GW of UE is corrected under corresponding bearing tunnel after the message
Row end points (Modify Bearer).
Wherein, whether the S-GW of UE needs change to be determined that, if S-GW is unchanged, it is further to source by the MME of UE
DeNB sends full stop (End marker) to notify that it need not forward packet to target DeNB again；If S-GW changes,
The selected new S-GW of MME orders sets up the information such as the related carrying marks of the UE.The S-GW of UE updates or sets up descending biography
Just packet can be sent directly to target DeNB after defeated endpoint of a tunnel information, target DeNB further exists packet
RN is sent on wireless link, finally UE is transferred to by RN.The MME of UE replys PATH SWITCH REQUEST ACK and disappears to RN
Cease and completed with notification path conversion and the renewal of user plane link.
Step 405：In RN and after the completion of being accepted the path integration of UE i.e. user plane bearer information updating, target DeNB is led to
Know that source DeNB discharges the contextual information of these nodes, handoff procedure terminates.
One of ordinary skill in the art will appreciate that all or part of step in said method can be instructed by program
Related hardware is completed, and described program can be stored in computer-readable recording medium, such as read only memory, disk or CD
Deng.Alternatively, all or part of step of above-described embodiment can also be realized using one or more integrated circuits.Accordingly
Ground, each module/unit in above-described embodiment can be realized in the form of hardware, it would however also be possible to employ the shape of software function module
Formula is realized.The application is not restricted to the combination of the hardware and software of any particular form.
Embodiment 2
The present embodiment introduces a kind of host base station, and the base station is capable of achieving the increase path integration side proposed in embodiment 1
Method, it includes：
First module, when via node RN Jing switch and are linked into this host base station, turns to the MME request paths of RN
Change, and determine whether the path integration of RN completes；
Second unit, after the MME request paths conversion to RN, or after the completion of the path integration of RN, will still be resident
The downlink bearing information of transformation is needed in the user equipment of RN cells, the MME of user equipment is sent to.
Wherein, second unit can pass through path switching request information needs the UE for still residing at RN cells under transformation
Row carrying information is sent to the MME of the UE.Specifically, UE is carried in path switching request information in target host base station
The former S1 interface identifier in its MME of downlink bearing information and UE of S1 interface identifier, request transduction pathway.Request transduction pathway
Downlink bearing information include need carry mark and transmit Tunnel End Point Identifier.
In some preferred versions, second unit, multiple user equipmenies in the user equipment for still residing at RN cells
When MME is same MME, for save resources, this multiple user equipment can be needed by same path switching request information
The downlink bearing information to be changed is sent to the MME.
Also in some preferred versions, second unit, in MME and the user equipment for still residing at RN cells of RN
When MME is same MME, by UE is needed transformation in same path switching request information downlink bearing information and the RN
The downlink bearing information for needing transformation is sent to the MME.
Embodiment 3
The present embodiment introduces a kind of RN equipment, the increase path changing method proposed in its achievable embodiment 1, its bag
Include：
First module, in this RN equipment Jing after switching is linked into new host base station, obtains from target host base station
Still reside at the MME of the user equipment of RN cells；
Second unit, needs the downlink bearing information of transformation to be sent to user the user equipment for still residing at RN cells
The MME of equipment.
Wherein, second unit can pass through path switching request information needs the UE for still residing at RN cells under transformation
Row carrying information is sent to the MME of UE.Specifically, S1s of the UE in target host base station is carried in path switching request information
The former S1 interface identifier in its MME of downlink bearing information and UE of interface identifier, request transduction pathway.Request transduction pathway
Downlink bearing information includes carrying mark and transmission Tunnel End Point Identifier.
Also in some schemes, second unit, multiple user equipmenies in the user equipment for still residing at RN cells
When MME is same MME, this multiple user equipment is needed by same path switching request information for the downlink bearing of transformation
Information is sent to the MME, so as to save Internet resources.
One of ordinary skill in the art will appreciate that all or part of step in said method can be instructed by program
Related hardware is completed, and described program can be stored in computer-readable recording medium, such as read only memory, disk or CD
Deng.Alternatively, all or part of step of above-described embodiment can also be realized using one or more integrated circuits.Accordingly
Ground, each module/unit in above-described embodiment can be realized in the form of hardware, it would however also be possible to employ the shape of software function module
Formula is realized.The application is not restricted to the combination of the hardware and software of any particular form.
From above-described embodiment as can be seen that RN has been changed after host base station, the downlink data tunnel end points of renewal is obtained
(target DeNB) information, so as to still reside in the core network element of UE of RN cells downlink path can also be changed.So, UE
Downlink data packet can be sent to correct host base station (target DeNB) by P-GW/S-GW, then by target DeNB change data
RN is sent on wireless link after bag mark at itself and between RN, and then eventually arrives at UE, it is ensured that system is before RN switchings
After can be always UE normal Communications service is provided.
The above, only preferred embodiments of the application are not intended to limit the protection domain of the application.It is all this
Within the spirit and principle of application, any modification, equivalent substitution and improvements done etc. should be included in the protection model of the application
Within enclosing.
Claims (17)
1. it is a kind of strengthen path integration method, it is characterised in that the method includes：
Jing after switching is linked into new host base station, the RN or target host base station will still reside at RN to via node RN
The user equipment of cell needs the downlink bearing information of transformation, is sent to the Mobility Management Entity MME of the user equipment, with
Ask the MME and change downlink data tunnel terminal for the user equipment.
2. the method for claim 1, it is characterised in that
The downlink bearing information is sent to the user by the RN or target host base station by path switching request information
The MME of equipment.
3. method as claimed in claim 2, it is characterised in that
S1 interface identifier, request conversion of the user equipment in target host base station is carried in the path switching request information
Former S1 interface identifier of the downlink bearing information and user equipment in path in its MME, wherein, request the descending of transduction pathway is held
Information carrying breath includes carrying mark and transmission Tunnel End Point Identifier.
4. method as claimed in claim 2, it is characterised in that
When the MME of multiple user equipmenies is same MME in the user equipment for still residing at RN cells, by same
This multiple user equipment is needed the downlink bearing information of transformation to be sent to the MME by path switching request information.
5. the method as described in claim 2,3 or 4, it is characterised in that
The user equipment for still residing at RN cells is needed the downlink bearing information of transformation for the target host base station, is sent to
The process of the MME of the user equipment is as follows：
The target host base station will still reside at the user equipment needs of RN cells after the completion of the path integration of the RN
The downlink bearing information of transformation, is sent to the MME of the user equipment；Or
The target host base station will still reside at the use of RN cells while the MME request paths to the RN are changed
Family equipment needs the downlink bearing information of transformation, is sent to the MME of the user equipment.
6. method as claimed in claim 5, it is characterised in that
If the MME of the MME of the RN and the user equipment is same MME, the target host base station is to the RN
MME request paths change while, the user for still residing at RN cells is set by same path switching request information
The standby downlink bearing information and the RN for needing transformation needs the downlink bearing information of transformation, be sent to the user equipment and
The MME of the RN.
7. the method as described in claim 2,3 or 4, it is characterised in that
The user equipment for still residing at RN cells is needed the RN downlink bearing information of transformation, is sent to the user and is set
The process of standby MME is as follows：
The RN obtains the MME of the user equipment for still residing at RN cells from target host base station, by the user equipment
The downlink bearing information for changing is needed to be sent to the MME of user equipment.
8. method as claimed in claim 7, it is characterised in that
The RN is after the path integration success of itself, or is successfully accessed behind target host base station, little by RN is still resided at
The user equipment in area needs the downlink bearing information of transformation, is sent to the MME of the user equipment.
9. a kind of host base station, it is characterised in that the base station includes：
First module, when via node RN Jing switch and are linked into this host base station, turns to the MME request paths of the RN
Change, and determine whether the path integration of the RN completes；
Second unit, after the MME request paths conversion to the RN, or after the completion of the path integration of RN, will still be resident
The downlink bearing information of transformation is needed in the user equipment of RN cells, the MME of the user equipment is sent to.
10. base station as claimed in claim 9, it is characterised in that
The second unit, the user equipment is sent to by path switching request information by the downlink bearing information
MME。
11. base stations as claimed in claim 10, it is characterised in that
S1 interface identifier, request conversion of the user equipment in target host base station is carried in the path switching request information
Former S1 interface identifier of the downlink bearing information and user equipment in path in its MME, wherein, request the descending of transduction pathway is held
Information carrying breath includes carrying mark and transmission Tunnel End Point Identifier.
12. base stations as described in claim 10 or 11, it is characterised in that
When the MME of multiple user equipmenies in the user equipment for still residing at RN cells is same MME, described second
This multiple user equipment is needed the downlink bearing information of transformation to be sent to this by unit by same path switching request information
MME。
13. base stations as described in claim 10 or 11, it is characterised in that
When the MME of the RN is same MME with the MME of the user equipment for still residing at RN cells, the second unit,
The downlink bearing information and the RN of transformation is needed to need the user equipment by same path switching request information
The downlink bearing information of transformation is sent to the MME.
14. a kind of via node RN equipment, it is characterised in that the equipment includes：
First module, in this RN equipment Jing after switching is linked into new host base station, obtains still from target host base station
Reside in the MME of the user equipment of RN cells；
Second unit, needs the downlink bearing information of transformation to be sent to user equipment the user equipment for still residing at RN cells
MME.
15. equipment as claimed in claim 14, it is characterised in that
The second unit, the user equipment is sent to by path switching request information by the downlink bearing information
MME。
16. equipment as claimed in claim 15, it is characterised in that
S1 interface identifier, request conversion of the user equipment in target host base station is carried in the path switching request information
Former S1 interface identifier of the downlink bearing information and user equipment in path in its MME, wherein, request the descending of transduction pathway is held
Information carrying breath includes carrying mark and transmission Tunnel End Point Identifier.
17. equipment as described in claim 15 or 16, it is characterised in that
When the MME of multiple user equipmenies in the user equipment for still residing at RN cells is same MME, described second
This multiple user equipment is needed the downlink bearing information of transformation to be sent to this by unit by same path switching request information
MME。
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110203989.2A CN102892162B (en) | 2011-07-20 | 2011-07-20 | Host base station, relay node device and method for strengthening route switch |
| PCT/CN2012/072730 WO2012155656A1 (en) | 2011-07-20 | 2012-03-21 | Host base station, relay node apparatus and enhanced-path switching method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110203989.2A CN102892162B (en) | 2011-07-20 | 2011-07-20 | Host base station, relay node device and method for strengthening route switch |
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| Publication Number | Publication Date |
|---|---|
| CN102892162A CN102892162A (en) | 2013-01-23 |
| CN102892162B true CN102892162B (en) | 2017-04-12 |
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| CN201110203989.2A Active CN102892162B (en) | 2011-07-20 | 2011-07-20 | Host base station, relay node device and method for strengthening route switch |
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| Country | Link |
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| CN (1) | CN102892162B (en) |
| WO (1) | WO2012155656A1 (en) |
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|---|---|---|---|---|
| CN102932855B (en) * | 2011-08-11 | 2017-05-17 | 中兴通讯股份有限公司 | Method and system for switching relay nodes (RN) |
| CN110087272B (en) * | 2013-02-22 | 2021-10-08 | 三星电子株式会社 | Method and system for providing simultaneous connections between multiple E-node bs and user equipment |
| CN104812008B (en) * | 2014-01-28 | 2020-02-04 | 北京三星通信技术研究有限公司 | Method and device for supporting UE (user equipment) to move in small cell system |
| CN106612528B (en) * | 2015-10-26 | 2019-11-01 | 展讯通信（上海）有限公司 | Base station and its method for choosing MME |
| EP3496458A4 (en) * | 2016-08-12 | 2019-07-03 | Huawei Technologies Co., Ltd. | Data processing method and relevant device |
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| CN101651971A (en) * | 2009-09-15 | 2010-02-17 | 新邮通信设备有限公司 | Downlink switching method and system |
| CN101841824A (en) * | 2009-03-17 | 2010-09-22 | 大唐移动通信设备有限公司 | Method, system and relay equipment for implementing cell switch |
| JP2011120181A (en) * | 2009-12-07 | 2011-06-16 | Ntt Docomo Inc | Mobile communication system and radio base station |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI20075697A0 (en) * | 2007-10-02 | 2007-10-02 | Nokia Siemens Networks Oy | Method, computer program, apparatus and system |
| CN102118812B (en) * | 2009-12-31 | 2014-07-30 | 华为技术有限公司 | Switching method, system, relay station, control base station and base station in relay network, |
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- 2011-07-20 CN CN201110203989.2A patent/CN102892162B/en active Active
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- 2012-03-21 WO PCT/CN2012/072730 patent/WO2012155656A1/en active Application Filing
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101841824A (en) * | 2009-03-17 | 2010-09-22 | 大唐移动通信设备有限公司 | Method, system and relay equipment for implementing cell switch |
| CN101651971A (en) * | 2009-09-15 | 2010-02-17 | 新邮通信设备有限公司 | Downlink switching method and system |
| JP2011120181A (en) * | 2009-12-07 | 2011-06-16 | Ntt Docomo Inc | Mobile communication system and radio base station |
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| WO2012155656A1 (en) | 2012-11-22 |
| CN102892162A (en) | 2013-01-23 |
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