CN103582048B - The protectiveness transmission method of P2P switching command in small cell network - Google Patents
The protectiveness transmission method of P2P switching command in small cell network Download PDFInfo
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Abstract
The present invention discloses P2P(PicocelltoPicocell in a kind of small cell network, and microcellulor is to microcellulor) the protectiveness transmission method of switching command, belong to the P2P handoff technique field under the medium and small cellular network environment of 3GPPLTE-A system. First the method sends, to UE and serving cell Macrocell, the backup that switching command carries out handover relevant information by cell-of-origin Picocell and target handover cell Picocell; Serving cell Macrocell is receiving the laggard row relax of switching command; UE determines target handover cell information and cell-of-origin relevant information according to the switching command received afterwards, completes preparation and the realization of switching; If UE fails correctly to receive correct switching command relevant information, then feed back to serving cell Macrocell and require to retransmit, until reaching maximum retransmission. The method of the invention can ensure the reliability transmission of switching command well, simultaneously, transmission spectrum effectiveness and the channel resource utilization ratio of switching command can be improved well, thus avoid the handoff failure that cannot correctly transmit and cause due to switching command under the small cell network environment of complexity.
Description
Technical field
The invention belongs to mobile communication technical field, specifically belong to the P2P handoff technique field under the medium and small cellular network environment of 3GPPLTE-A system, in particular to the protectiveness transmission method of P2P switching command in a kind of small cell network.
Background technology
Heterogeneous network (HeterogeneousNetworks, HetNets) is the multi-layer honeycomb network introduced the low power nodes less than traditional grand honeycomb (Macrocell) base station transmitting power and formed. The low power nodes supported in LTE-A comprises remote radio-frequency heads (RRH), femto base station (Pico), femto base station (Femto) and relay station (Relay) and Home eNodeB (HomeeNB). The volume of these nodes is little, is convenient to carry out flexibly network deployment, and coverage is little simultaneously, it is possible to utilize potential high band frequency spectrum more easily, is for solving indoor and the covering of focus scene and capacity problem effective way.
Movability is small cell network relative to other without one of key advantages for wire system. Compared to WiFi system, although it facilitates a low-cost and simple deployment scheme, but, this kind of scheme can not process mobile subscriber terminal (UEs). By contrast, can by switching (HO) for mobile UEs provides a continuous print to connect as universal mobile communication system (UMTS) and long-term evolution (LTE) such cellular network. This kind of handover process allows a UE being in connection mode to transfer to target community from its serving cell own, can guarantee service quality (QoS) simultaneously.
For the network deployment scenarios being different from homogeneous network, the deployment scenario of different structure small cell network is more complicated and changeable, and therefore, its switching type is also divided into four classes, P2P, P2M, M2P, M2M accordingly. 3GPPTR36.932 technical report is pointed out, the handover failure rate in state 2 reduces the principal element that heterogeneous network disposes scheme travelling performance. The basic reason of state 2 handoff failure is that the PDCCH uplink authorization information from service Picocell that switching command or UE receive is destroyed due to the strong interference of Macrocell. Therefore, how to ensure switching command reliability transmission in the heterogeneous network environment of complexity better, become the focal issue again that travelling performance strengthens.
Summary of the invention
In view of this, it is an object of the invention to provide the protectiveness transmission method of P2P switching command in a kind of small cell network, the method introduces the thought of multiple cell auxiliary transmission, switching command timesharing gap is transmitted in the network deployment scenarios of complexity.
For achieving the above object, the present invention provides following technical scheme:
A protectiveness transmission method for P2P switching command in small cell network, first sends, to UE and serving cell Macrocell, the backup that switching command carries out handover relevant information by cell-of-origin Picocell and target handover cell Picocell; Serving cell Macrocell is receiving the laggard row relax of switching command; UE determines target handover cell information and cell-of-origin relevant information according to the switching command received afterwards, completes preparation and the realization of switching; If UE fails correctly to receive correct switching command relevant information, then feed back to serving cell Macrocell and require to retransmit, until reaching maximum retransmission.
Further, when UE leaves and enter the Picocell of another target community from a cell-of-origin Picocell, switching command can serving cell Macrocell belonging to cell-of-origin and target community and UE transmit simultaneously, when being namely switched to Picocell2 from Picocell1, serving cell, source Macrocell1, Picocell1, target community Picocell2 can transmit switching command.
Further, when UE leaves cell-of-origin Picocell1, now it is subject to switching the demand of preparation operation, cell-of-origin Picocell needs to send to UE to be about to switch the target community Picocell2 handover information entered, simultaneously, by the relevant information of target community Picocell2 notice Macrocell1, wherein Picocell1 and Picocell2 belongs to a serving cell Macrocell1; Whether UE also can receive, while receiving the handover relevant information of cell-of-origin Picocell1, the handover relevant information coming from target handover cell Picocell2, allow to indicate UE or UE has switched and enters into new target community; In above-mentioned 2nd process, target community Picocell2 can send handover relevant information to same serving cell Macrocell1 equally, it is convenient in Macrocell1 and backs up handover relevant information data, when UE cannot correctly receive the handover information from cell-of-origin and target community, UE processes to feedback nack message in the hope of next step.
Further, cell-of-origin Picocell1 and target community Picocell2 is in together in same serving cell Macrocell1, cell-of-origin Picocell1 to UE send while handover relevant information can notification service community Macrocell1, inform its cell-of-origin information, by switch into target cell information; Target handover cell is sending the confirmation that also can allow while permission switching carries out confirmation to serving cell Macrocell1 transmission switching to UE; Now, UE receive from the handover relevant information of cell-of-origin Picocell1 and target community Picocell2, can obtain completely equally at serving cell Macrocell; The information that cell-of-origin Picocell1 and target community Picocell2 sends is carried out decoding correction process by serving cell Macrocell1, it is ensured that the exactness of handover relevant information, in order to the handover information repeat requests of response UE.
Further, the gap when transmission of switching command is divided into three: gap when first, cell-of-origin Picocell1 sends switching relevant instruction information to serving cell Macrocell1 and UE simultaneously; Gap when the 2nd, target community Picocell2 sends handover relevant information instruction to serving cell Macrocell1 and UE simultaneously; Gap when the 3rd, UE, according to the exactness of the switching dependent instruction received, sends the re-transmission that nack message request source community Picocell1 or grand cellular service community Macrocell1 carries out handover relevant information.
Further, described serving cell Macrocell1 replys the handover information retransmission request process of UE, serving cell Macrocell1, after receiving the handover relevant information that cell-of-origin Picocell1 and target community Picocell2 sends, through decoding, correction process, waits the feedback information of UE; If UE can correctly receive the handover relevant information coming from cell-of-origin Picocell1 and target handover cell Picocell2, then UE feeds back an ACK information to cell-of-origin Picocell1 and target community Picocell2, proceed the judgement of handover measurement correlation factor, follow the tracks of the measured intensity of UE at any time, judge whether to be switched; If UE does not correctly receive the handover relevant information of cell-of-origin Picocell1 or does not correctly receive the handover relevant information of target community Picocell2, then UE feeds back nack message to serving cell Macrocell1, request service community Macrocell1 carries out the information re-transmission of handover relevant information, and these information cell-of-origin information, target cell information, switching prepare time delay information; If within the limited number of retransmissions of regulation, what UE can be correct receives about the handover relevant information of cell-of-origin Picocell1 and target community Picocell2, then think that the transmission success of this switching command completes; If UE asks the re-transmission of handover relevant information at feedback nack message to serving cell Macrocell1, serving cell Macrocell1 also carries out the re-transmission of handover relevant information within the scope of the restriction number of retransmissions of regulation simultaneously, until serving cell Macrocell1 reaches maximum retransmission, UE still fails correctly to receive the relevant source of switching, target cell information, then think that this time switching occurs unsuccessfully, the switch decision factor that UE starts a new round is measured, and tracking in time feedback measurement information, carry out the transmission of switching command next time.
The useful effect of the present invention is: the method for the invention can ensure the reliability transmission of switching command well, simultaneously, transmission spectrum effectiveness and the channel resource utilization ratio of switching command can be improved well, thus avoid the handoff failure that cannot correctly transmit and cause due to switching command under the small cell network environment of complexity.
Accompanying drawing explanation
In order to make the object of the present invention, technical scheme and useful effect clearly, the present invention provides following accompanying drawing to be described:
Fig. 1 is switching command transmission model diagram;
Fig. 2 is source, target and total serving cell process handover information schema.
Embodiment
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described in detail.
The protectiveness transmission scheme of a kind of P2P switching command in small cell network of the present invention, comprises the following steps:
(1) the multiple cell transmission of switching command
The present invention assumes that cell-of-origin Picocell1 and target handover cell Picocell2 belongs to same grand cellular service community Macrocell1 jointly.
First, mobile environment residing for UE is small cell network (SmallCell), UE when moving in a small cell network, constant Received signal strength intensity also carries out the measurement of the switch decision factor, when mobile UE detects that user's service performance that user's service performance that cell-of-origin Picocell1 provides does not have new community Picocell2 to provide is good time, new community Picocell2 is classified as temporary transient target handover cell.
2nd, mobile UE will send information notification grand cellular service community Macrocell1 after determining cell-of-origin Picocell1 and target handover cell Picocell2. Meanwhile, cell-of-origin Picocell1 and target handover cell Picocell2 can carry out the preparation work of handover process, sends switching dependent instruction respectively to mobile UE, and concrete manifestation is as follows:
When UE leaves cell-of-origin Picocell1, now it is subject to switching the demand of preparation operation, cell-of-origin Picocell1 needs to send the target community Picocell2 switching command information being about to switching and entering to UE, meanwhile, relevant information notice Macrocell1(Picocell1 and Picocell2 that UE needs to carry out cell merge belongs to a serving cell Macrocell1); While UE receives the handover relevant information of cell-of-origin Picocell1, also receiving the handover relevant information coming from target handover cell Picocell2, target handover cell Picocell2 sends handover relevant information to mobile UE to indicate whether to allow UE to carry out switching or whether UE has switched and enter into new target community. In the 2nd process, target community Picocell2 can send handover relevant information to same serving cell Macrocell1 equally, inform that community Picocell2 is classified as target handover cell, whether allows mobile UE to carry out to Picocell2 community switching and move whether UE has switched in the Picocell2 of target approach switching cell by mobile UE, it is convenient to like this in Macrocell1 and backs up handover relevant information data.
(2) re-transmission of switching command
Owing to cell-of-origin Picocell1 and target community Picocell2 is in together in same serving cell Macrocell1, therefore time cell-of-origin Picocell1 sends handover relevant information to UE, equally can notification service community Macrocell1, inform its cell-of-origin information, by switch into target cell information etc.; Equally, target handover cell also can send the confirmation switching and allowing while sending, to UE, the confirmation allowing switching to serving cell Macrocell1. Now, UE receive from the handover relevant information of cell-of-origin Picocell1 and target community Picocell2, can obtain completely equally at serving cell Macrocell. The information that cell-of-origin Picocell1 and target community Picocell2 sends is carried out decoding correction process by serving cell Macrocell1, it is ensured that the exactness of handover relevant information, in order to the handover information repeat requests of response UE.
If 1. moving the handover relevant information that UE only correctly receives cell-of-origin Picocell1, and correctly do not receive the handover relevant information of target handover cell Picocell2, this move UE sends nack message to grand cellular service community Macrocell1, instruction handover relevant information fails correctly to receive, and asks grand cellular service community Macrocell1 to send handover relevant information. after grand cellular service community Macrocell1 receives NACK instruction information, immediately the handover relevant information from cell-of-origin Picocell1 and target handover cell Picocell2 received before is carried out comprehensive treating process, rear send switching command relevant information to mobile UE, if mobile UE does not still correctly receive the handover relevant information of grand cellular service community Macrocell1, then move UE and send handover instruction information repeat requests to serving cell Macrocell1, switching command relevant information is correctly received until reaching the maximum retransmission of grand cellular service community Macrocell1 or moving UE. finally, if mobile UE still fails correctly to receive handover relevant information, then the relevant preparation flow process release this switched, carries out next and takes turns change detection and preparation work.
If 2. moving the handover relevant information that UE only correctly receives target community Picocell2, and correctly do not receive the handover relevant information of cell-of-origin Picocell1, this move UE sends nack message to grand cellular service community Macrocell1, instruction handover relevant information fails correctly to receive, and asks grand cellular service community Macrocell1 to send handover relevant information. after grand cellular service community Macrocell1 receives NACK instruction information, immediately the handover relevant information from cell-of-origin Picocell1 and target handover cell Picocell2 received before is carried out comprehensive treating process, rear send switching command relevant information to mobile UE, if mobile UE does not still correctly receive the handover relevant information of grand cellular service community Macrocell1, then move UE and send handover instruction information repeat requests to serving cell Macrocell1, switching command relevant information is correctly received until reaching the maximum retransmission of grand cellular service community Macrocell1 or moving UE. finally, if mobile UE still fails correctly to receive handover relevant information, then the relevant preparation flow process release this switched, carries out next and takes turns change detection and preparation work.
If 3. moving the handover relevant information that UE had not both correctly received cell-of-origin Picocel1, also the handover relevant information of target community Picocell2 is not correctly received, this move UE sends nack message to grand cellular service community Macrocell1, instruction handover relevant information fails correctly to receive, and asks grand cellular service community Macrocell1 to send handover relevant information to mobile UE. after grand cellular service community Macrocell1 receives NACK instruction information, immediately the handover relevant information from cell-of-origin Picocell1 and target handover cell Picocell2 received before is carried out comprehensive treating process, rear send switching command relevant information to mobile UE, if mobile UE does not still correctly receive the handover relevant information of grand cellular service community Macrocell1, then continue to send handover instruction information repeat requests, switching command relevant information is correctly received until reaching the maximum retransmission of grand cellular service community Macrocell1 or moving UE.
Now, if mobile UE does not correctly receive the switching dependent instruction coming from grand cellular service community Macrocell1, then the relevant preparation flow process release directly this switched, carries out next and takes turns change detection and preparation work; If mobile UE can correctly receive the switching relevant instruction information coming from grand cellular service community Macrocell1 after a retransmission, this move UE sends nack message to cell-of-origin Picocell1, inform that Picocell1 its handover relevant information in cell-of-origin fails correctly to be sent to mobile UE, the re-transmission of request handover relevant information. Handover relevant information is retransmitted by cell-of-origin Picocell1 after receiving nack message, if UE does not still correctly receive the handover relevant information of cell-of-origin Picocell1, then continue to send the re-transmission that nack message asks handover relevant information to Picocell1, correctly receive switching command relevant information until reaching the maximum retransmission of cell-of-origin Picocell1 or moving UE. Finally, if mobile UE fails correctly to receive cell-of-origin Picocell1 and the handover relevant information of grand cellular service community Macrocell1 simultaneously, then the relevant preparation flow process release this switched, carries out next and takes turns change detection and preparation work.
If 4. moving UE can correctly receive from the handover relevant information of cell-of-origin Picocell1 and target handover cell Picocell2, then start handover mechanism, for switching flow makes preparation.
Fig. 1 is switching command transmission model diagram, as shown in Figure 1, in the multiple cell transmitting procedure of switching command, owing to when UE enters another target community Picocell2 from a cell-of-origin Picocell1, switching command can be transmitted by cell-of-origin Picocell1, target community Picocell2 and grand cellular service community Macrocell1 simultaneously.
In transmitting procedure, the gap when transmission of switching command relevant information can be divided into three altogether. Gap when first, cell-of-origin Picocell1 belongs to same grand cellular service community Macrocell1 to grand cellular service community Macrocell1(Picocell1 and Picocell2 simultaneously) and UE transmission switching command relevant information; Gap when the 2nd, target community Picocell2 sends handover relevant information instruction to serving cell Macrocell1 and UE simultaneously; Gap when the 3rd, UE is according to the exactness of the switching dependent instruction received, send the re-transmission that nack message request source community Picocell1 or grand cellular service community Macrocell1 carries out handover relevant information, grand cellular service community Macrocell1 is receiving after the switching command relevant information of cell-of-origin Picocell1 and target community Picocell2, information is carried out the process such as decoding, error correction, ensure the exactness of reception information, send switching command relevant information repeat requests in order to mobile UE.
Fig. 2 gives UE and is receiving cell-of-origin Picocell1, target community Picocell2 and the schema of grand cellular service community Macrocell1 process handover relevant information. Following four kinds of situations specifically can be subdivided into for the treatment scheme after UE receives switching command relevant information:
1. move the switching command relevant information that UE only correctly receives cell-of-origin Picocell1, fail correctly to receive the handover relevant information coming from target handover cell Picocell2.
Now, mobile UE sends nack message to grand cellular service community Macrocell1, and instruction handover relevant information fails correctly to receive, and asks grand cellular service community Macrocell1 to send handover relevant information. after grand cellular service community Macrocell1 receives NACK instruction information, immediately the handover relevant information from cell-of-origin Picocell1 and target handover cell Picocell2 received before is carried out comprehensive treating process, rear send switching command relevant information to mobile UE, if mobile UE does not still correctly receive the handover relevant information of grand cellular service community Macrocell1, then move UE and send handover instruction information repeat requests to serving cell Macrocell1, switching command relevant information is correctly received until reaching the maximum retransmission of grand cellular service community Macrocell1 or moving UE. finally, if mobile UE still fails correctly to receive handover relevant information, then the relevant preparation flow process release this switched, carries out next and takes turns change detection and preparation work.
2. move the switching command relevant information that UE only correctly receives target handover cell Picocell2, fail correctly to receive the handover relevant information coming from cell-of-origin Picocell1.
This move UE sends nack message to grand cellular service community Macrocell1, and instruction handover relevant information fails correctly to receive, and asks grand cellular service community Macrocell1 to send handover relevant information. after grand cellular service community Macrocell1 receives NACK instruction information, immediately the handover relevant information from cell-of-origin Picocell1 and target handover cell Picocell2 received before is carried out comprehensive treating process, rear send switching command relevant information to mobile UE, if mobile UE does not still correctly receive the handover relevant information of grand cellular service community Macrocell1, then move UE and send handover instruction information repeat requests to serving cell Macrocell1, switching command relevant information is correctly received until reaching the maximum retransmission of grand cellular service community Macrocell1 or moving UE. finally, if mobile UE still fails correctly to receive handover relevant information, then the relevant preparation flow process release this switched, carries out next and takes turns change detection and preparation work.
3. move the handover relevant information that UE had not both correctly received cell-of-origin Picocel1, also correctly do not receive the handover relevant information of target community Picocell2.
This move UE sends nack message to grand cellular service community Macrocell1, and instruction handover relevant information fails correctly to receive, and asks grand cellular service community Macrocell1 to send handover relevant information to mobile UE. after grand cellular service community Macrocell1 receives NACK instruction information, immediately the handover relevant information from cell-of-origin Picocell1 and target handover cell Picocell2 received before is carried out comprehensive treating process, rear send switching command relevant information to mobile UE, if mobile UE does not still correctly receive the handover relevant information of grand cellular service community Macrocell1, then continue to send handover instruction information repeat requests, switching command relevant information is correctly received until reaching the maximum retransmission of grand cellular service community Macrocell1 or moving UE.
Afterwards, if mobile UE does not still correctly receive handover relevant information after request grand cellular service community Macrocell1 carries out the re-transmission of handover relevant information, the relevant preparation flow process release then directly this switched, carries out next and takes turns change detection and preparation work; If mobile UE can correctly be decoded to, after receiving retransmission information, the switching relevant instruction information coming from grand cellular service community Macrocell1, this move UE sends nack message to cell-of-origin Picocell1, inform that Picocell1 its handover relevant information in cell-of-origin fails correctly to be sent to mobile UE, the re-transmission of request handover relevant information. Handover relevant information is retransmitted by cell-of-origin Picocell1 after receiving nack message, if UE does not still correctly receive the handover relevant information of cell-of-origin Picocell1, then continue to send the re-transmission that nack message asks handover relevant information to Picocell1, correctly receive switching command relevant information until reaching the maximum retransmission of cell-of-origin Picocell1 or moving UE. Finally, if mobile UE fails correctly to receive cell-of-origin Picocell1 and the handover relevant information of grand cellular service community Macrocell1 simultaneously, then the relevant preparation flow process release this switched, carries out next and takes turns change detection and preparation work.
4. move UE can correctly receive from the handover relevant information of cell-of-origin Picocell1 and target handover cell Picocell2.
Now, mobile UE starts handover mechanism, for switching flow makes preparation.
What finally illustrate is, above preferred embodiment is only in order to illustrate the technical scheme of the present invention and unrestricted, although by above preferred embodiment to invention has been detailed description, but those skilled in the art are to be understood that, in the form and details it can be made various change, and do not deviate claims of the present invention limited range.
Claims (6)
1. the protectiveness transmission method of P2P switching command in a small cell network, it is characterised in that: first send, to UE and serving cell Macrocell, the backup that switching command carries out handover relevant information by cell-of-origin Picocell and target handover cell Picocell; Serving cell Macrocell is receiving the laggard row relax of switching command; UE determines target handover cell information and cell-of-origin relevant information according to the switching command received afterwards, completes preparation and the realization of switching; If UE fails correctly to receive correct switching command relevant information, then feed back to serving cell Macrocell and require to retransmit, until reaching maximum retransmission.
2. the protectiveness transmission method of P2P switching command in small cell network according to claim 1; it is characterized in that: when UE leaves and enter the Picocell of another target community from a cell-of-origin Picocell; switching command can serving cell Macrocell belonging to cell-of-origin and target community and UE transmit simultaneously; when being namely switched to Picocell2 from Picocell1, serving cell, source Macrocell1, Picocell1, target community Picocell2 can transmit switching command.
3. the protectiveness transmission method of P2P switching command in small cell network according to claim 2, it is characterized in that: when UE leaves cell-of-origin Picocell1, now it is subject to switching the demand of preparation operation, cell-of-origin Picocell needs to send to UE to be about to switch the target community Picocell2 handover information entered, simultaneously, by the relevant information of target community Picocell2 notice Macrocell1, wherein Picocell1 and Picocell2 belongs to a serving cell Macrocell1; Whether UE also can receive, while receiving the handover relevant information of cell-of-origin Picocell1, the handover relevant information coming from target handover cell Picocell2, allow to indicate UE or UE has switched and enters into new target community; The handover relevant information coming from target handover cell Picocell2 is received at UE, whether allow to indicate UE or UE has switched the process entering into new target community, target community Picocell2 can send handover relevant information to same serving cell Macrocell1 equally, it is convenient in Macrocell1 and backs up handover relevant information data, when UE cannot correctly receive the handover information from cell-of-origin and target community, UE processes to feedback nack message in the hope of next step.
4. the protectiveness transmission method of P2P switching command in small cell network according to claim 3, it is characterized in that: cell-of-origin Picocell1 and target community Picocell2 is in together in same serving cell Macrocell1, cell-of-origin Picocell1 to UE send while handover relevant information can notification service community Macrocell1, inform its cell-of-origin information, by switch into target cell information; Target handover cell is sending the confirmation that also can allow while permission switching carries out confirmation to serving cell Macrocell1 transmission switching to UE; Now, UE receive from the handover relevant information of cell-of-origin Picocell1 and target community Picocell2, can obtain completely equally at serving cell Macrocell; The information that cell-of-origin Picocell1 and target community Picocell2 sends is carried out decoding correction process by serving cell Macrocell1, it is ensured that the exactness of handover relevant information, in order to the handover information repeat requests of response UE.
5. the protectiveness transmission method of P2P switching command in small cell network according to claim 4, it is characterized in that: the gap when transmission of switching command is divided into three: gap when first, cell-of-origin Picocell1 sends switching relevant instruction information to serving cell Macrocell1 and UE simultaneously; Gap when the 2nd, target community Picocell2 sends handover relevant information instruction to serving cell Macrocell1 and UE simultaneously; Gap when the 3rd, UE, according to the exactness of the switching dependent instruction received, sends the re-transmission that nack message request source community Picocell1 or grand cellular service community Macrocell1 carries out handover relevant information.
6. the protectiveness transmission method of P2P switching command in small cell network according to claim 5, it is characterized in that: described serving cell Macrocell1 replys the handover information retransmission request process of UE, serving cell Macrocell1 is after receiving the handover relevant information that cell-of-origin Picocell1 and target community Picocell2 sends, through decoding, correction process, wait the feedback information of UE; If UE can correctly receive the handover relevant information coming from cell-of-origin Picocell1 and target handover cell Picocell2, then UE feeds back an ACK information to cell-of-origin Picocell1 and target community Picocell2, proceed the judgement of handover measurement correlation factor, follow the tracks of the measured intensity of UE at any time, judge whether to be switched; If UE does not correctly receive the handover relevant information of cell-of-origin Picocell1 or does not correctly receive the handover relevant information of target community Picocell2, then UE feeds back nack message to serving cell Macrocell1, request service community Macrocell1 carries out the information re-transmission of handover relevant information, and these information cell-of-origin information, target cell information, switching prepare time delay information; If within the limited number of retransmissions of regulation, what UE can be correct receives about the handover relevant information of cell-of-origin Picocell1 and target community Picocell2, then think that the transmission success of this switching command completes; If UE asks the re-transmission of handover relevant information at feedback nack message to serving cell Macrocell1, serving cell Macrocell1 also carries out the re-transmission of handover relevant information within the scope of the restriction number of retransmissions of regulation simultaneously, until serving cell Macrocell1 reaches maximum retransmission, UE still fails correctly to receive the relevant source of switching, target cell information, then think that this time switching occurs unsuccessfully, the switch decision factor that UE starts a new round is measured, and tracking in time feedback measurement information, carry out the transmission of switching command next time.
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| CN101686113A (en) * | 2008-09-22 | 2010-03-31 | 中兴通讯股份有限公司 | Realizing method, dividing method and multiplexing method of feedback channel |
| EP2521299A1 (en) * | 2009-12-28 | 2012-11-07 | Huawei Technologies Co., Ltd. | Data transmission method and network side device |
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| CN101686113A (en) * | 2008-09-22 | 2010-03-31 | 中兴通讯股份有限公司 | Realizing method, dividing method and multiplexing method of feedback channel |
| EP2521299A1 (en) * | 2009-12-28 | 2012-11-07 | Huawei Technologies Co., Ltd. | Data transmission method and network side device |
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