CN100551157C - A kind of base station switch method - Google Patents
A kind of base station switch method Download PDFInfo
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- CN100551157C CN100551157C CNB2006100674921A CN200610067492A CN100551157C CN 100551157 C CN100551157 C CN 100551157C CN B2006100674921 A CNB2006100674921 A CN B2006100674921A CN 200610067492 A CN200610067492 A CN 200610067492A CN 100551157 C CN100551157 C CN 100551157C
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Abstract
The invention discloses a kind of base station switch method, comprise: the media access control layer in the base station is provided with automatic repeat requests level cache, packet data convergence protocol at IAD is provided with automatic repeat requests L2 cache, and the measurement module in the base station is provided with switching preparation threshold and handover decisions thresholding; When source base station judges that the measurement report of subscriber equipment arrives switching preparation threshold, keep two-level cache synchronous; When measurement report arrives the handover decisions thresholding, the packet data convergence protocol protocol Data Unit in the L2 cache is sent to target BS, and in the end a packet carries and is sent completely sign; Target BS receiving block data convergence protocol protocol Data Unit is to level cache, and is processed into the medium access control layer protocol data cell; After target BS was finished and received and handle accordingly, the request IAD was carried out the base station handover operation.The present invention can reduce the processing load of source base station, has realized the harmless switching in base station.
Description
Technical field
The present invention relates to a kind of base station switch method, pass through the base station switch method of finishing dealing with in particularly a kind of 3G (Third Generation) Moblie long evolving system ARQ (automatic repeat request, repeat requests automatically).
Background technology
In the third generation Mobile Communication letter long evolving system, the mechanism that layer ARQ entity and bottom HARQ (Hybrid Automatic Repeat Request mixes automatic repeat requests) entity combine on user's face uses realizes reliable transmission.When the ARQ entity was positioned at the base station, under the switch instances of base station, known mobile management solution had base station pass-through mode and multicast mode two classes at present.
Base station pass-through mode operation principle is: when source base station is judged UE (User Equipment, when measurement report subscriber equipment) arrives the handover decisions thresholding, give target BS all PDU in customer equipment context and the ARQ buffer memory (Protocol Data Unit, protocol Data Unit) with corresponding forwards respectively; After target BS is finished reception and corresponding the processing, request IAD execution base station handover operation.Multicast mode operation principle is: IAD switches all cell multicast user data of concentrating to UE always fast, perhaps based on the request of UE only between transfer period to all candidate cell multicast users data, so just do not need before switching to transmit all PDU the ARQ buffering area to target BS from source base station.
But the deficiency of base station pass-through mode solution is: can produce than long delay in the process of all PDU in the forwarding ARQ buffering area, and increase the processing load of source base station.The deficiency of multicast mode is: switch the back and judge which data has sent to the mechanism complexity of UE, and taken the additional object local resource in the multicast process, from having reduced power system capacity to a great extent.
Summary of the invention
Technical problem solved by the invention is to provide a kind of base station switch method, only need transmit customer equipment context from source base station to target BS to reach before switch the base station, reduces the processing load of source base station, has realized the harmless switching in base station.
For solving the problems of the technologies described above, the invention provides a kind of base station switch method, when the subscriber equipment measurement report arrives the source base station handoff threshold, protocol Data Unit in customer equipment context and the automatic repeat requests buffer memory is transmitted to target BS, after target BS is finished processing, IAD is carried out the base station and is switched, and this method comprises the steps:
Step 1, automatic repeat requests level cache is set in the media access control layer of source base station, automatic repeat requests L2 cache is set at the convergence protocol layer of IAD;
Step 2, switching preparation threshold and handover decisions thresholding are set at described source base station;
Step 3, determine switching preparation threshold when arriving according to the measurement report of subscriber equipment when described source base station, send switching to described IAD and prepare notification message, make automatic repeat requests level cache and the automatic repeat requests L2 cache in the described IAD in the described source base station synchronous, synchronously after the success, described source base station sends synchronous successful notification message to described IAD, described source base station sends the periodic state report to described IAD, and the automatic repeat requests buffer memory of two-stage keeps synchronous regime;
Step 4, when described source base station determines the handover decisions thresholding when arriving according to described subscriber equipment measurement report, send the handover decisions notification message to described IAD; Send customer equipment context message to described target BS;
After step 5, described IAD receive described handover decisions notification message, set up user's face with described target BS and be connected;
After step 6, described target BS receive described customer equipment context message, carrying out resource allocation and resource reservation handles, reply described customer equipment context acknowledge message to described source base station after running succeeded, send data to described IAD and prepare notification message;
After step 7, described source base station receive described customer equipment context acknowledge message, send switching command to described subscriber equipment;
After step 8, described subscriber equipment are received switching command, with the described target BS flow process that connects, after connecting flow process and setting up successfully, to described target BS transmission switch acknowledgment message;
Step 9, described IAD receive data and prepare notification message, the packet data convergence protocol protocol Data Unit in the automatic repeat requests L2 cache is sent to described target BS, and will finish the described target BS of message informing;
Step 10, described target BS receiving block data convergence protocol protocol Data Unit arrive automatic repeat requests level cache, and handle, and generate the medium access control layer protocol data cell;
Step 11, described target BS are received described subscriber equipment switch acknowledgment message, after the packet data convergence protocol protocol Data Unit that receives the automatic repeat requests L2 cache of described IAD is finished, to described IAD transmit path handoff request message;
Step 12, described IAD are received execution route handover operation after the handoff request message of described path.
In this method step 3, described automatic repeat requests level cache in the described source base station and the automatic repeat requests L2 cache synchronizing step in the described IAD of making can comprise the steps:
After described IAD is received and is switched the preparation notification message, automatically storing the packet data convergence protocol protocol Data Unit in the repeat requests L2 cache, stored packet data convergence protocol protocol Data Unit content, number consistent with the packet data convergence protocol protocol Data Unit content that sends to source base station, numbering;
In the described source base station automatically the repeat requests level cache from the packet data convergence protocol protocol Data Unit of first mark of receiving described IAD, during all medium access control layer protocol data cells in being sent completely original buffer memory, generate the packet data convergence protocol service data unit of each medium access control layer protocol data cell, corresponding packet data convergence protocol protocol Data Unit is all arranged in the automatic repeat requests L2 cache of described IAD.
Use the present invention, can before switch the base station, only need transmit customer equipment context to target BS, reduced the processing load of source base station, and realized harmless switching from source base station.
Description of drawings
Fig. 1 is the described ARQ structural representation of an embodiment of the invention block diagram;
Fig. 2 is the schematic flow sheet that switch base station described in the embodiment of the invention.
Embodiment
In embodiments of the present invention, (the Medium Access Control of the MAC in the base station at first, media access control layer is placed ARQ entity and ARQ level cache, and the PDCP in IAD (Packet Data Convergence Protocol, packet data convergence protocol) is provided with the ARQ L2 cache.The content of ARQ L2 cache is the IP bag after excessive compression, i.e. PDCP PDU.1), original PDCP service data unit SDU is additional or additional MAC header content in the ARQ level cache is MAC PDU, and MAC PDU forms mode by two kinds of data:, this situation MACPDU and PDCP PDU are 1 pair 1 and concern; 2), to PDCP SDU according to regular length be connected in series/segmentation after additional or additional MAC header, this situation MAC PDU and PDCP PDU be more than 1 pair, many to 1 or many-to-many relationship.The capacity of ARQ L2 cache equals or is slightly larger than the ARQ level cache, can comprise all original user data information in the ARQ level cache to guarantee it.
Fig. 1 is an ARQ structural representation block diagram among the embodiment, and as shown in the figure, its structure is mainly the structure that layer ARQ buffer memory on the two-stage adds bottom HARQ buffer memory, wherein:
Contain PDCP layer 1011 and ARQ L2 cache wherein in the IAD 101.
Contain MAC layer 1021 and ARQ level cache wherein, HARQ buffer memory, ARQ entity, HARQ entity in the source base station 102.The memory space of some static allocation of difference or dynamic assignment is a retransmission buffer 10211 separately in ARQ level cache and the HARQ buffer memory, deposits the PDU or the PDU pointer that need re-transmission, and its content may be sky.
Contain MAC layer 1031 and ARQ level cache wherein, HARQ buffer memory, ARQ entity, HARQ entity in the target BS 103 too.The memory space of same some static allocation respectively or dynamic assignment is a retransmission buffer 10311 separately in ARQ level cache and the HARQ buffer memory, deposits the PDU or the PDU pointer that need re-transmission, and its content may be sky.
Retransmission process when the ARQ level cache is used under the normal condition being non-switching the, this situation do not need the ARQ L2 cache to participate in.The ARQ L2 cache only is used for the base station and switches preceding buffer memory mails to source base station from IAD PDCP PDU.
After setting level cache and L2 cache, switching preparation threshold and handover decisions thresholding are set in the measurement module of source base station.
Fig. 2 is the schematic flow sheet that switch the base station among the embodiment, as shown in the figure, is setting one-level, L2 cache, and after the switching preparation threshold, handover decisions thresholding, the implementing procedure that switch the base station is:
Wherein, the synchronizing process of two-level cache is: when switching preparation threshold arrives in the measurement report of source base station judgement UE, send switching to IAD and prepare notification message; IAD is received beginning buffer memory PDCP PDU in the ARQ L2 cache after this message, the PDCP PDU content of institute's buffer memory, number consistent with the PDCP PDU content that sends to source base station, numbering; The ARQ level cache is from receiving the PDCP PDU of first mark, during all MAC PDU in being sent completely its original buffer memory, PDCP SDU (the Service Data Unit of each the MAC PDU that generates, service data unit) corresponding PDCP PDU will all be arranged in the ARQ L2 cache, this state we to be also referred to as the ARQ two-level cache synchronous, synchronously after source base station send synchronous successful notification message to IAD; From buffer memory, after the deletion, send the periodic state report message when the MAC PDU in the ARQ level cache sends successfully, make the relevant PDCP PDU of ARQ level cache deletion to IAD;
Wherein, customer equipment context comprises: UE sign, UE address, UE ability, cell information, source base station information, target BS information, QoS information, radio bearer information etc.;
At this moment, after connection is set up successfully, UE is after target BS sends switch acknowledgment message, IAD receives data and prepares notification message, PDCP PDU in the ARQ L2 cache is sent to target BS, and in the end a packet carries and is sent completely sign, after perhaps being sent completely again with independent message informing target BS; Target BS receives PDCP PDU to the ARQ level cache and after handling accordingly, generates MAC PDU; Target BS is being received the UE switch acknowledgment message, and after receiving IAD ARQ L2 cache PDCP PDU and finishing, carry out next step to IAD transmit path handoff request message.
User's face resource dispose procedure between step 221, IAD execution and the source base station.
A kind of new mobile management solution when the invention provides the base station switching, make and before switching, between target BS, only need transmit customer equipment context from source base station, thereby reduced the processing load of source base station, also realized the harmless switching of base station simultaneously.
Claims (10)
1, a kind of base station switch method, when the subscriber equipment measurement report arrives the source base station handoff threshold, protocol Data Unit in customer equipment context and the automatic repeat requests buffer memory is transmitted to target BS, after target BS is finished processing, IAD is carried out the base station and is switched, it is characterized in that, comprise the steps:
Step 1, automatic repeat requests level cache is set in the media access control layer of source base station and target BS, automatic repeat requests L2 cache is set at the convergence protocol layer of IAD;
Step 2, switching preparation threshold and handover decisions thresholding are set at described source base station;
Step 3, determine switching preparation threshold when arriving according to the measurement report of subscriber equipment when described source base station, send switching to described IAD and prepare notification message, make automatic repeat requests level cache and the automatic repeat requests L2 cache in the described IAD in the described source base station synchronous, synchronously after the success, described source base station sends synchronous successful notification message to described IAD, described source base station sends the periodic state report to described IAD, and the automatic repeat requests buffer memory of two-stage keeps synchronous regime;
Step 4, when described source base station determines the handover decisions thresholding when arriving according to described subscriber equipment measurement report, send the handover decisions notification message to described IAD; Send customer equipment context message to described target BS;
After step 5, described IAD receive described handover decisions notification message, set up user's face with described target BS and be connected;
After step 6, described target BS receive described customer equipment context message, carrying out resource allocation and resource reservation handles, reply described customer equipment context acknowledge message to described source base station after running succeeded, send data to described IAD and prepare notification message;
After step 7, described source base station receive described customer equipment context acknowledge message, send switching command to described subscriber equipment;
After step 8, described subscriber equipment are received switching command, with the described target BS flow process that connects, after connecting flow process and setting up successfully, to described target BS transmission switch acknowledgment message;
Step 9, described IAD receive data and prepare notification message, the packet data convergence protocol protocol Data Unit in the automatic repeat requests L2 cache is sent to described target BS, and will finish the described target BS of message informing;
Step 10, described target BS receiving block data convergence protocol protocol Data Unit be to the automatic repeat requests level cache of target BS, and handle, and generates the medium access control layer protocol data cell;
Step 11, described target BS are received described subscriber equipment switch acknowledgment message, after the packet data convergence protocol protocol Data Unit that receives the automatic repeat requests L2 cache of described IAD is finished, to described IAD transmit path handoff request message;
Step 12, described IAD are received execution route handover operation after the handoff request message of described path.
2, the method for claim 1 is characterized in that, in the step 2, described switching preparation threshold and the handover decisions thresholding of being provided with is to be provided with in the measurement module of described source base station.
3, the method for claim 1 is characterized in that, in the step 3, described automatic repeat requests level cache in the described source base station and the automatic repeat requests L2 cache synchronizing step in the described IAD of making comprises the steps:
After described IAD is received and is switched the preparation notification message, automatically storing the packet data convergence protocol protocol Data Unit in the repeat requests L2 cache, stored packet data convergence protocol protocol Data Unit content, number consistent with the packet data convergence protocol protocol Data Unit content that sends to source base station, numbering;
In the described source base station automatically the repeat requests level cache from the packet data convergence protocol protocol Data Unit of first mark of receiving described IAD, during all medium access control layer protocol data cells in being sent completely original buffer memory, generate the packet data convergence protocol service data unit of each medium access control layer protocol data cell, corresponding packet data convergence protocol protocol Data Unit is all arranged in the automatic repeat requests L2 cache of described IAD.
4, the method for claim 1 is characterized in that, further comprises the steps: in the described step 3
Described source base station is after described IAD sends synchronous successful notification message synchronously; Medium access control layer protocol data cell in the automatic repeat requests level cache of described source base station sends successfully, and after from buffer memory, deleting, send the periodic state report message to described IAD, make the relevant packet data convergence protocol protocol Data Unit of the automatic repeat requests level cache deletion of described source base station.
5, the method for claim 1, it is characterized in that, in the step 4, described transmission customer equipment context message is to send customer equipment identification, user device address, UE capability, cell information, source base station information, target BS information, quality of service information, radio bearer information.
6, the method for claim 1 is characterized in that, in the step 8, described subscriber equipment and the described target BS flow process that connects, be with described target BS set up the sub-district synchronously, radio bearer reshuffles flow process.
7, the method for claim 1 is characterized in that, in the step 9, describedly will finish the described target BS of message informing, be to carry by packet in the end to be sent completely sign, will finish the described target BS of message informing.
8, the method for claim 1 is characterized in that, in the step 9, describedly will finish the described target BS of message informing, be by being sent completely the back with the described target BS of independent message informing, will finish the described target BS of message informing.
9, the method for claim 1 is characterized in that, in the step 12, described path handover operation is finished switching by destination address being revised as described target BS address.
10, the method for claim 1 is characterized in that, further comprises the steps: in the described step 12
Switch finish after, described IAD will and described source base station between user's face resource discharge.
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| CNB2006100674921A CN100551157C (en) | 2006-03-29 | 2006-03-29 | A kind of base station switch method |
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| CNB2006100674921A CN100551157C (en) | 2006-03-29 | 2006-03-29 | A kind of base station switch method |
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| CN100551157C true CN100551157C (en) | 2009-10-14 |
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| KR101514841B1 (en) | 2007-08-10 | 2015-04-23 | 엘지전자 주식회사 | Method for re-attempting a random access effectively |
| EP2186247A4 (en) | 2007-08-10 | 2014-01-29 | Lg Electronics Inc | Method for controlling harq operation in dynamic radio resource allocation |
| WO2009022877A2 (en) | 2007-08-14 | 2009-02-19 | Lg Electronics Inc. | A method of transmitting and processing data block of specific protocol layer in wireless communication system |
| KR100937432B1 (en) | 2007-09-13 | 2010-01-18 | 엘지전자 주식회사 | Method of allocating radio resources in a wireless communication system |
| KR101461970B1 (en) | 2007-09-13 | 2014-11-14 | 엘지전자 주식회사 | Method of performing polling procedure in a wireless communication system |
| KR101591824B1 (en) | 2007-09-18 | 2016-02-04 | 엘지전자 주식회사 | Method of performing polling procedure in a wireless communication system |
| KR101396062B1 (en) | 2007-09-18 | 2014-05-26 | 엘지전자 주식회사 | Effective data block transmission method using a header indicator |
| US8687565B2 (en) | 2007-09-20 | 2014-04-01 | Lg Electronics Inc. | Method of effectively transmitting radio resource allocation request in mobile communication system |
| KR20090041323A (en) | 2007-10-23 | 2009-04-28 | 엘지전자 주식회사 | Method of effectively transmitting identification information of terminal during the generation of data block |
| EP2208294B1 (en) | 2007-10-29 | 2019-07-31 | LG Electronics Inc. | Method of repairing a security failure |
| CN101494852B (en) * | 2008-01-24 | 2012-03-28 | 电信科学技术研究院 | Method and apparatus for distributing identification list of tracking zone in switching process |
| KR101163275B1 (en) * | 2008-03-17 | 2012-07-05 | 엘지전자 주식회사 | Method for transmitting pdcp status report |
| WO2009116788A1 (en) | 2008-03-17 | 2009-09-24 | Lg Electronics Inc. | Method of transmitting rlc data |
| CN101557620B (en) * | 2008-04-08 | 2011-03-30 | 中国移动通信集团公司 | Method, device and system for realizing terminal handover |
| CN102084687B (en) * | 2008-07-04 | 2014-03-05 | 爱立信电话股份有限公司 | Adaptation of handover command size in mobile telecommunication network |
| CN101577946A (en) * | 2009-06-12 | 2009-11-11 | 华为技术有限公司 | Seamless switching method, device and system |
| CN102045721B (en) * | 2010-12-28 | 2014-03-05 | 广州杰赛科技股份有限公司 | Safe switching method for user terminal in wireless metropolitan area network (WMAN) |
| CN102905333B (en) * | 2011-07-29 | 2016-05-18 | 上海贝尔股份有限公司 | For changing method and the corresponding eNB node of Long-Term Evolution GSM |
| WO2014019240A1 (en) * | 2012-08-03 | 2014-02-06 | 华为技术有限公司 | Data processing method, base station and ue |
| CN104247504B (en) * | 2013-04-16 | 2018-05-11 | 华为技术有限公司 | Cell switching method and equipment |
| CN104937974A (en) * | 2013-05-10 | 2015-09-23 | 富士通株式会社 | Information configuration method, information sending method, and data transceiving control method and device thereof |
| US9854478B2 (en) * | 2014-01-17 | 2017-12-26 | Qualcomm Incorporated | Techniques for switching bearers between radio access technologies (RATS) |
| WO2017012071A1 (en) * | 2015-07-21 | 2017-01-26 | 华为技术有限公司 | User equipment switching method and apparatus |
| CN108401271B (en) * | 2017-02-07 | 2021-03-26 | 中兴通讯股份有限公司 | Base station switching method, system and storage medium |
| CN110636561B (en) * | 2018-06-21 | 2022-11-08 | 中兴通讯股份有限公司 | Information transmission method and device, storage medium and electronic device |
| EP4275393A4 (en) * | 2021-01-08 | 2024-10-09 | Lenovo Beijing Ltd | Method and apparatus for multicast and broadcast services |
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