CN101222415B - Method for implementing descending protocol data unit of media access control layer - Google Patents
Method for implementing descending protocol data unit of media access control layer Download PDFInfo
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- CN101222415B CN101222415B CN2007100012352A CN200710001235A CN101222415B CN 101222415 B CN101222415 B CN 101222415B CN 2007100012352 A CN2007100012352 A CN 2007100012352A CN 200710001235 A CN200710001235 A CN 200710001235A CN 101222415 B CN101222415 B CN 101222415B
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Abstract
The invention discloses a method for realizing media access control layer down stream protocol data unit. Firstly, an MAC-d PDU is generated according to an RLC PDU and is taken as an MAC-hs SDU; when the MAC-d PDU is generated, the MAC-d header information is not added and the logic channel C/T multiplex is not done; next, the multiplex of the MAC-hs SDU from the same logic channel or different logic channels is realized in an MAC-hs entity and the corresponding header information is added to generate MAC-hs PDU, wherein, the header information comprises a transmission serial number, a plurality of logic channel identifiers, identifying information of related domain, length information of the MAC-hs SDU and segmentation information. The invention can support the segmentation function of the RLC PDU, has small spending and keeps good backward compatibility.
Description
Technical field
The present invention relates to the implementation method of medium access control layer protocol data cell in the wireless communication system, relate in particular to the implementation method of the medium access control layer protocol data cell that is applicable to the high data rate Packet Service.
Background technology
Insert the wireless chain control layer of WCDMA system wireless Access Network RAN in the 3G (Third Generation) Moblie Wideband Code Division Multiple Access (WCDMA), protocol Data Unit RLC PDU in the respective wireless carrying is default regular length, generates after wireless chain control layer service data unit RLC SDU is carried out segmentation/serial connection/filling processing and increases corresponding header according to described preset length.
Described RLC PDU is called media access control layer service data unit MAC SDU after wireless chain control layer sends to media access control layer.At the media access control layer of supporting the high-speed downlink packet access HSDPA function, the MAC-d entity is positioned at radio network controller (RNC), and MAC SDU generates MAC-d PDU through the multiplexing back of logic channel C/T.MAC-d PDU becomes MAC-hs SDU by the MAC-hs entity that high speed descending sharing channel Frame Protocol HS-DSCH FP sends to base station B node Node B.MAC-hs SDU multiplexing and add the MAC-hs header after generate MAC-hsPDU.The process of above-mentioned generation MAC-hs PDU as shown in Figure 1.Wherein, the existing MAC-d PDU that is mapped on the high speed downlink shared channel HS-DSCH, promptly the form of MAC-hs SDU frame structure is as shown in Figure 2.The frame structure of existing MAC-hs PDU as shown in Figure 3, being explained as follows of each field in the header:
Version Flag (VF): version sign is 1bit.This field provides extended capability for MAC-hs PDU form.This field value is taken as 0 in existing version, and value 1 keeps need not.
Queue Identifier (Queue ID): queue identity is 3bit.This field is used to indicate the sign of recipient's reorder queue.
Transmission Sequence Number (TSN): transmission sequence number is 6bit.This field is provided at the transmission sequence number on the high speed descending sharing channel, and the purpose that is used to reorder is to support the delivery function according to the order of sequence to the upper-layer protocol layer.
Size Index Identifier (SID): length index sign is 6bit.This field is used to represent the length of one group of continuous MAC-d PDU.SID is disposed respectively each Queue ID by high level.
Number of MAC-d PDUs (N): MAC-d PDU number is 7bit.This field is used to represent have the number of the continuous MAC-d PDU of equal length.
Flag (F): domain identifier is 1bit.This field is used for being illustrated in the MAC-hs header and whether also has more field.F was made as 0 o'clock, and the expression back is with one group of SID, N, F field; F was made as 1 o'clock, and the expression back is with MAC-hs SDU.The number that is set to 0 F in a Transmission Time Interval TTI is 7 to the maximum.
In a Transmission Time Interval TTI, can send a MAC-hs PDU at most for each user equipment (UE) (User Equipment), the length of MAC-hs header is variable, and the MAC-hs SDU that is multiplexed into a MAC-hs PDU in a TTI belongs to same reorder queue.
In order further to improve data rate and spectrum efficiency on the basis of high-speed downlink packet access HSDPA and high speed uplink packet access HSUPA, the 3G (Third Generation) Moblie partnership projects is organized 3GPP (The 3rd Generation Partnership Project) to propose high-speed packet and is inserted the HSPA evolution items.In this project, for the improvement of radio interface layer 2 scheme of variable-length protocol data unit of wireless links control layer RLC PDU has been proposed, the main thought of this scheme is: wireless links control layer affirmation mode is supported protocol Data Unit length flexibly; Media access control layer MAC-hs entity is supported the segmentation to protocol data unit of wireless links control layer RLC PDU; Whether media access control layer MAC-e and MAC-es support further research is treated in the segmentation of protocol data unit of wireless links control layer RLC PDU.
Media access control layer MAC-hs entity need be done corresponding modification to existing MAC-hs PDU frame structure in order to support the fragmentation feature to RLC PDU.
Summary of the invention
Technical problem to be solved by this invention is, a kind of implementation method of descending protocol data unit of media access control layer is provided, and makes media access control layer MAC-hs entity can support the fragmentation feature to RLC PDU.
The invention provides a kind of implementation method of descending protocol data unit of media access control layer, comprise the steps:
(1) with protocol data unit of wireless links control layer RLC PDU at media access control layer MAC-d entity as media access control layer service data unit MAC-d SDU, generate medium access control layer protocol data cell MAC-d PDU, as media access control layer service data unit MAC-hs SDU, additional MAC-d header during generation, it is multiplexing not carry out logic channel C/T;
(2) will carry out multiplexing at the MAC-hs entity from the media access control layer service data unit MAC-hs SDU of same logic channel or Different Logic channel, and additional corresponding header generates medium access control layer protocol data cell MAC-hs PDU, wherein, comprise version information, transmission sequence number, a plurality of Logic Channel Identifier in the described header, and under each Logic Channel Identifier several comprise domain identifier information and about the information sets of the segment information of the length information of each MAC-hs SDU, each MAC-hsSDU.
Further, the described medium access control layer protocol data cell MAC-hsPDU that generates in the step (2), comprise header and multiplexing after MAC-hs SDU payload.The described medium access control layer protocol data cell MAC-hs PDU that generates in the step (2) in order to adapt to the length of transmission block TB, further comprises: the filler that the MAC-hs SDU payload end after multiplexing adds.
Further, carry out in the step (2) when multiplexing, if described MAC-hs SDU from same logic channel, is continuous at the MAC-hs of same logic channel SDU then.
Further, transmission sequence number described in the MAC-hs PDU header described in the step (2), provide the transmission sequence number TSN on high speed descending sharing channel, the purpose that is used to reorder is to support the delivery function according to the order of sequence to the upper-layer protocol layer, and it is 6 bits or 7 bits.
Further, Logic Channel Identifier described in the MAC-hs PDU header is the sign LCID that is used to indicate recipient's reorder queue described in the step (2), and it is 5 bits or 6 bits or 7 bits.
Further, the segment information of each MAC-hs SDU in the MAC-hs PDU header described in the step (2), be one and use two bits segmentation marker SI of totally 4 values, expression wherein the content of multiplexing MAC-hs SDU representative, wherein: a not segmentation of value representation; Non-final stage under the value representation segmentation situation; Final stage under the value representation segmentation situation; Value is used to represent under the segmentation situation first section or as keeping the position.
Further, the length information of each MAC-hs SDU in the MAC-hs PDU header described in the step (2) is a Length Indication LI who uses 10 bits or 11 bits, expression wherein the length of multiplexing each MAC-hs SDU.
Further, described domain identifier information described in the step (2) in the MAC-hs PDU header, be to use two bits domain identifier F of totally 4 values, be used to indicate the information after this sign, wherein: a value is used to represent that the information of back is segmentation marker SI, Length Indication LI, the domain identifier F of other MAC-hs SDU under the same logic channel; A value is used to represent that the information of back is Logic Channel Identifier LCID; A value is used to represent that the information of back is the MAC-SDU payload; A value is used for expanded function as retention.
Further, the length of header is variable-length described in the step (2).
The invention provides the implementation method of a kind of MAC-hs PDU of the RLC of support PDU fragmentation feature, configuration transmission sequence number, the segment information that disposes each MAC-hs SDU and length information in header, and a plurality of logical channel informations etc., make described MAC-hs PDU can support RLC PDU fragmentation feature.The expense that the present invention introduces is very little, and has kept better compatibility backward.
Description of drawings
Fig. 1 is the schematic diagram of existing MAC-hs PDU framing procedure;
Fig. 2 is that the existing MAC-d PDU that is mapped on the HS-DSCH is a MAC-hs SDU frame structure schematic diagram;
Fig. 3 is the frame structure schematic diagram of existing MAC-hs PDU;
Fig. 4 is that the MAC-d PDU that is mapped in the embodiment of the invention on the HS-DSCH is a MAC-hsSDU frame structure schematic diagram;
Fig. 5 is the frame structure schematic diagram of MAC-hs PDU in the embodiment of the invention.
Embodiment
Below in conjunction with drawings and the specific embodiments technical solution of the present invention is described in further details.
In the present embodiment, in order to make media access control layer MAC-hs entity can support fragmentation feature, need do corresponding modification to existing MAC-hs PDU frame structure to RLCPDU.The invention provides a kind of implementation method of MAC-hs PDU frame structure, can support the segmentation of RLC PDU, and the header overhead of introducing is very little, and kept better compatibility backward.
The main thought of present embodiment is as follows:
(1) it is multiplexing that the MAC-d PDU of media access control layer (being MAC-hs SDU) does not carry out the C/T of logic channel, it is multiplexing that MAC-hs PDU supports that the MAC-d PDU in a logic channel and/or a plurality of logic channel carries out, and a MAC-hs PDU uses a transmission sequence number TSN;
(2) in MAC-hs PDU header, use two bits the segmentation marker SI of totally 4 values represent wherein the content of multiplexing MAC-hs SDU representative, wherein:
A not segmentation of value representation;
Non-final stage under the value representation segmentation situation;
Final stage under the value representation segmentation situation;
A value can be used to represent segmentation situation following first section or conduct reservation position;
(3) in MAC-hs PDU header, use the Length Indication LI of 10 bits or 11 bits represent wherein the length of multiplexing each MAC-hs SDU;
(4) information after in MAC-hs PDU header, using two bits the domain identifier F of totally 4 values indicating this sign, wherein:
The information of a value representation back is segmentation marker SI, Length Indication LI, the domain identifier F of other MAC-hs SDU under the same logic channel;
The information of a value representation back is Logic Channel Identifier LCID;
The information of a value representation back begins the payload for MAC-SDU;
A value is used for expanded function for retention.
Based on top thinking, the implementation method of medium access control layer protocol data cell comprises the steps: in the present embodiment
Step 1: generate MAC-d PDU.
RLC PDU generates MAC-d PDU at the MAC-d entity as MAC-d SDU, additional MAC-d header during generation, and it is multiplexing not carry out logic channel C/T.The generation of MAC-d PDU is independent of the position of MAC-d entity, still is that base station node B is irrelevant with the MAC-d entity at radio network controller (RNC) promptly.The MAC-d PDU that is generated is promptly generated by a MAC SDU as shown in Figure 4.
Step 2: generate MAC-hs PDU.
The described MAC-d PDU that generates in the step 1 is carried out multiplexing at the MAC-hs entity as MAC-hs SDU and other MAC-hs SDU, and add generation MAC-hs PDU behind the MAC-hs header.
The MAC-hs PDU frame format that is generated, as shown in Figure 5, by header and multiplexing after MAC-hs SDU payload constitute, the MAC-hs SDU payload after multiplexing allows to add filler at last to adapt to the length of transmission block TB.
Described MAC-hs SDU carries out when multiplexing, and MAC-hs SDU can be from same logic channel or different logic channels.It is continuous requiring at the MAC-hs of same logic channel SDU.
Described MAC-hs SDU carries out when multiplexing, and the length of the MAC-hs PDU header that is generated is variable-length, and the implication of each field is followed following definition:
Version Flag (VF): version sign is 1bit.This field provides extended capability for MAC-hs PDU form.This field value is taken as 1 in the present embodiment.
Transmission Sequence Number (TSN): transmission sequence number.This field is provided at the transmission sequence number on the high speed descending sharing channel, and the purpose that is used to reorder is to support the delivery function according to the order of sequence to the upper-layer protocol layer.Field length can be defined as 6bit or 7bit.
Logical Channel ID (LCID): Logic Channel Identifier.This field is used to indicate the sign of recipient's reorder queue.Field length can be defined as 5bit or 6bit or 7bit.
Segmentation Identifier (SI): divide segment identification.This field is used for representing that whether each MAC-hs SDU of respective logical channels is the MAC-hs SDU after the segmentation.Field length can be defined as 2bit.4 values and the corresponding implication of its correspondence are: 00 represents not segmentation; 01 expression segmentation and non-final stage MAC-hs SDU; 10 expression segmentations and be final stage MAC-hs SDU; 11 keep or expression segmentation and be first section MAC-hs SDU.
Length Indicator (LI): MAC-hs SDU length mark, be used to represent the length of a multiplexing MAC-hs SDU.Field length can be defined as 10bit or 11bit.
Flag (F): domain identifier.This field is used for being illustrated in the MAC-hs header and whether also has more field.F is made as and represented that the back followed one group of SI, LI, F field at 00 o'clock; Be made as and represented that the back followed LCID at 01 o'clock; F is made as and represented that the back followed MAC-hs SDU at 10 o'clock; 11 keep.Field length can be defined as 2bit.
The form of each field is in the MAC-hs PDU header that is generated:
VF、TSN、(LCID、(SI、LI、F))。
Wherein, LCID, the same LCID of (SI, LI, F) expression support a plurality of SI, LI, F;
(LCID, (SI, LI, F)) expression header is supported a plurality of LCID, (SI, LI, F);
Each MAC-hs PDU is provided with a transmission sequence number TSN.
Described bracket () expression field wherein can be a plurality of continuous like combinationss.
For example the concrete mode of VF, TSN, (LCID, (SI, LI, F)) may be following form:
VF；TSN；LCID、SI、LI、F、SI、LI、F、SI、LI、F；LCID、SI、LI、F、SI、LI、F；
In reality is implemented, figure place that above-mentioned field is shared and actual residing position may with the present invention in defined incomplete same, as long as but used implication described in the above-mentioned explanation of field, then should think also to belong to content of the present invention.
Instantiation:
At first, RLC PDU is generated the MAC-d PDU of frame structure as shown in Figure 4 at the MAC-d entity as MAC-d SDU, additional MAC-d header during generation, it is multiplexing not carry out logic channel C/T;
Then, as shown in Figure 5, to carry out multiplexing at the MAC-hs entity from the MAC-hsSDU of same logic channel or Different Logic channel, and additional corresponding header generates MAC-hs PDU, the MAC-hs PDU that generates meets frame structure shown in Figure 5, and each MAC-hs PDU is provided with a transmission sequence number TSN.
The composition mode of header is:
VF；TSN；LCID、SI
1、LI
1、F
1、...、SI
k、LI
k、F
k；LCID、SI
1、LI
1、F
1、...、SI
k、LI
k、F
k、...；
In sum, the invention provides the implementation method of a kind of MAC-hs PDU of the RLC of support PDU fragmentation feature, the header overhead of introducing is very little, and has kept better compatibility backward.
Claims (10)
1. the implementation method of a descending protocol data unit of media access control layer is characterized in that, comprises the steps:
(1) with protocol data unit of wireless links control layer RLC PDU at media access control layer MAC-d entity as media access control layer service data unit MAC-d SDU, generate medium access control layer protocol data cell MAC-d PDU, as media access control layer service data unit MAC-hs SDU, additional MAC-d header during generation, it is multiplexing not carry out logic channel C/T;
(2) will carry out multiplexing at the MAC-hs entity from the media access control layer service data unit MAC-hs SDU of same logic channel or Different Logic channel, and additional corresponding header generates medium access control layer protocol data cell MAC-hs PDU, wherein, comprise version information, transmission sequence number, a plurality of Logic Channel Identifier in the described header, and under each Logic Channel Identifier several comprise domain identifier information and about the information sets of the segment information of the length information of each MAC-hs SDU, each MAC-hsSDU.
2. the method for claim 1 is characterized in that, the described medium access control layer protocol data cell MAC-hs PDU that generates in the step (2), comprise header and multiplexing after the MAC-hsSDU payload.
3. method as claimed in claim 2, it is characterized in that, the described medium access control layer protocol data cell MAC-hs PDU that generates in the step (2) in order to adapt to the length of transmission block TB, further comprises: the filler that the MAC-hs SDU payload end after multiplexing adds.
4. the method for claim 1 is characterized in that, carries out in the step (2) when multiplexing, if described MAC-hs SDU from same logic channel, is continuous at the MAC-hs of same logic channel SDU then.
5. the method for claim 1, it is characterized in that, transmission sequence number described in the MAC-hsPDU header described in the step (2), provide the transmission sequence number TSN on high speed descending sharing channel, be used to reorder purpose to support the delivery function according to the order of sequence to the upper-layer protocol layer, it is 6 bits or 7 bits.
6. the method for claim 1 is characterized in that, Logic Channel Identifier described in the MAC-hsPDU header is the sign LCID that is used to indicate recipient's reorder queue described in the step (2), and it is 5 bits or 6 bits or 7 bits.
7. the method for claim 1, it is characterized in that, the segment information of each MAC-hs SDU in the MAC-hsPDU header described in the step (2), be one and use two bits segmentation marker SI of totally 4 values, expression wherein the content of multiplexing MAC-hs SDU representative, wherein: a not segmentation of value representation; Non-final stage under the value representation segmentation situation; Final stage under the value representation segmentation situation; Value is used to represent under the segmentation situation first section or as keeping the position.
8. the method for claim 1, it is characterized in that, the length information of each MAC-hs SDU in the MAC-hsPDU header described in the step (2) is a Length Indication LI who uses 10 bits or 11 bits, expression wherein the length of multiplexing each MAC-hs SDU.
9. as claim 1 or 6 or 7 or 8 described methods, it is characterized in that, described domain identifier information described in the step (2) in the MAC-hs PDU header, be to use two bits domain identifier F of totally 4 values, be used to indicate the information after this sign, wherein: a value is used to represent that the information of back is segmentation marker SI, Length Indication LI, the domain identifier F of other MAC-hs SDU under the same logic channel; A value is used to represent that the information of back is Logic Channel Identifier LCID; A value is used to represent that the information of back is the MAC-SDU payload; A value is used for expanded function as retention.
10. the method for claim 1 is characterized in that, the length of header is variable-length described in the step (2).
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8094682B2 (en) | 2007-09-28 | 2012-01-10 | Interdigital Patent Holdings, Inc. | Method and apparatus for generating radio link control protocol data units |
| CN101651909B (en) * | 2008-08-12 | 2012-03-07 | 华为技术有限公司 | Request method for wireless link set, equipment and system |
| EP2422543B1 (en) | 2009-04-24 | 2013-07-24 | InterDigital Patent Holdings, Inc. | Method and apparatus for generating a radio link control protocol data unit for multi-carrier operation |
| CN102196361A (en) * | 2010-03-05 | 2011-09-21 | 中兴通讯股份有限公司 | Sending and receiving methods, devices and systems of MBS (Multicasting Broadcasting Service) protocol data unit |
| CN103379543B (en) * | 2012-04-23 | 2016-06-15 | 普天信息技术研究院有限公司 | A kind of data transmission method based on TD-LTE |
| US10314023B2 (en) * | 2014-01-22 | 2019-06-04 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and apparatus for extending signaling in a wireless communication network |
| CN106060875A (en) * | 2016-05-12 | 2016-10-26 | 珠海市魅族科技有限公司 | Communication method, communication apparatus and sites in wireless local area network |
| CN106060939B (en) * | 2016-05-16 | 2019-05-21 | 珠海市魅族科技有限公司 | Communication means, communication device, access point and the website of WLAN |
| CN110249687B (en) * | 2017-11-03 | 2023-10-13 | 华为技术有限公司 | Method and apparatus for processing medium access control protocol data unit |
| CN110324860B (en) * | 2018-03-29 | 2021-05-25 | 维沃移动通信有限公司 | Data sending method, data receiving method and user equipment |
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| CN1731771A (en) * | 2005-08-16 | 2006-02-08 | 中兴通讯股份有限公司 | System and method for supporting multi-carrier downlink high-speed data packet access |
| CN1852581A (en) * | 2005-10-12 | 2006-10-25 | 上海华为技术有限公司 | Method for transmitting data on downward link |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1731771A (en) * | 2005-08-16 | 2006-02-08 | 中兴通讯股份有限公司 | System and method for supporting multi-carrier downlink high-speed data packet access |
| CN1852581A (en) * | 2005-10-12 | 2006-10-25 | 上海华为技术有限公司 | Method for transmitting data on downward link |
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