CN100574330C - The method of sending and receiving of non-conformation mode protocol data unit in the radio link layer - Google Patents
The method of sending and receiving of non-conformation mode protocol data unit in the radio link layer Download PDFInfo
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- CN100574330C CN100574330C CNB2005100898665A CN200510089866A CN100574330C CN 100574330 C CN100574330 C CN 100574330C CN B2005100898665 A CNB2005100898665 A CN B2005100898665A CN 200510089866 A CN200510089866 A CN 200510089866A CN 100574330 C CN100574330 C CN 100574330C
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Abstract
The invention discloses the method for sending and receiving of non-conformation mode protocol data unit in a kind of radio link layer.Sending method: transmitting terminal receives the upper-layer service data cell, determines whether to be the Service Data Unit that interweaves; If, this Service Data Unit is assembled into non-conformation mode protocol data unit, by the Length Indication position this protocol Data Unit is designated as intersection-protocol data unit; Before transmitting terminal is inserted into first common protocol data cell that does not send as yet with this intersection-protocol data unit, will move after the common protocol data cell that does not send as yet; Send in order again.Method of reseptance: receiving terminal receives the lower-layer protocols data cell, judges whether to be intersection-protocol data unit; If receiving terminal is opened up buffering in addition, the data in the intersection-protocol data unit are put into buffering area according to the content of Length Indication position; After the intersection-protocol data unit of the same Service Data Unit that interweaves collects, reassemble into the Service Data Unit that interweaves, send to the upper strata.
Description
Technical field
The present invention relates to the wireless chain control layer (RLC in Wideband Code Division Multiple Access (WCDMA) (WCDMA) cell mobile communication systems, Radio Link Control) sends the data wireless links packet technology in, specifically, relate to Unacknowledged Mode (UM in the wireless chain control layer, Unacknowledged Mode) method of sending and receiving of intersection-protocol data unit (HPDU, Hybrid Protocol Data Unit).
Background technology
Radio link control RLC is controlling the transmission of data wireless links bag in the WCDMA system.The UM rlc protocol is a kind of unresponsive control protocol.At transmitting terminal, upper-layer service data cell (SDU, Service Data Unit) is handled through cutting, serial connection, filling, and the protocol Data Unit (PDU, Protocol Data Unit) that forms specific size sends to the opposite end.At receiving terminal, the PDU that receives is reassembled into SDU deliver to the upper strata.
Among Fig. 1, the RLC transmitting terminal receives top layer SDU, and SDU is carried out burst, serial connection or fill forming UM PDU, sends the UM PDU of respective numbers according to lower floor's ability.Wherein, the part of identical shade is same SDU among the PDU, has the part of oblique line to represent filling part.The RLC receiving terminal reassembles into SDU with PDU, delivers to the upper strata.If it is have PDU to lose then abandon the PDU of reorganization not as yet before this PDU, identical with transmitting terminal to the explanation in the legend.
In the prior art, UM RLC receives the SDU that the upper strata sends, if the maximum length that the length of SDU can be carried greater than PDU then becomes suitable length to be carried by PDU the SDU burst; If, can use the serial connection technology less than the maximum length that PDU can carry.The form of existing UM PDU as shown in Figure 2.
Wherein, the implication in each territory of UM PDU is as follows:
Sequence number (SN, Sequence Number): the sequence number of UM PDU, be used for identifying the order of UM PDU, length is 7bit;
Extension bits (E, Extension bit): whether be Length Indication and extension bits, length is 1bit if being used to refer to next byte.Wherein, the next byte of 0 expression is data or filling block, and the next byte of 1 expression is Length Indication and extension bits;
Data field (Data): the data of representing actual SDU;
Fill area (PAD): the recipient should abandon;
Length Indication (LI, Length Indicator): Length Indication, the length of indication from last byte of each RLCSDU in the PDU to the RLC head, unit is a byte number, length can be 7bit or 15bit.Adopt the indication of 7 bit lengths when the length of UM PDU of configuration is less than or equal to 125 bytes, the length of UM PDU adopts the indication of 15 bit lengths during greater than 125 bytes;
Defined following particular value during 7 LI:
0000000: represent that previous PDU has carried last burst of SDU just and do not had LI to indicate this SDU to finish in previous PDU;
1111100: first data byte is first byte of a SDU among the expression PDU;
1111101: keep, the PDU that has LI to equal this value will be received end and abandon;
1111110: keep, the PDU that has LI to equal this value will be received end and abandon;
1111111: the remainder of expression PDU is a filling part.
Defined following particular value during 15 LI:
000000000000000: represent that previous PDU has carried last burst of SDU just and do not had LI to indicate this SDU to finish in previous PDU;
111111111111011: represent that previous PDU has carried last burst of SDU just and do not had LI to indicate this SDU to finish in previous PDU, and the length of final data subtracts 1 length that just equals last fragment data of SDU among the PDU; Not needing when needing with this sign 7 LI during 15 LI with similar sign is that Length Indication need account for 2 bytes during because of 15 LI;
111111111111100: first data byte is first byte of a SDU among the expression PDU;
111111111111101: keep, the PDU that has LI to equal this value will be received end and abandon;
111111111111110: keep, the PDU that has LI to equal this value will be received end and abandon;
111111111111111: the remainder of expression PDU is a filling part.
According to the agreement regulation, when transmitting terminal SDU length is big, the SDU burst must be become a plurality of PDU to send, the SN of the PDU behind the same SDU burst is continuously necessary, otherwise receiving terminal can't carry out correct reorganization.
Therefore, RLC can't add the PDU of the higher SDU correspondence of priority in a SDU burst PDU at present, can't handle the situation of HPDU, and promptly the SDU of high priority seizes the processing of low priority SDU.For convenience of description, the preferential SDU that sends of needs is called the SDU that interweaves (HSDU, Hybrid Service Data Unit).
Summary of the invention
Technical problem to be solved by this invention provides the method for sending and receiving of non-conformation mode protocol data unit in a kind of radio link layer.Can in a SDU burst PDU, add the high pairing PDU of SDU of priority, can handle HPDU.Realized that the SDU of high priority seizes the processing of low priority SDU.
For solving the problems of the technologies described above, it is as follows to the invention provides scheme:
The sending method of non-conformation mode protocol data unit comprises the steps: in the radio link layer
Transmitting terminal receives the upper-layer service data cell, according to the type of Service Data Unit, need to determine the preferential Service Data Unit that interweaves that sends;
To the preferential Service Data Unit that interweaves that sends of needs, this Service Data Unit that interweaves is assembled into non-conformation mode protocol data unit, and in non-conformation mode protocol data unit, this non-conformation mode protocol data unit is designated as intersection-protocol data unit by first Length Indication position;
Transmitting terminal is inserted into this intersection-protocol data unit before first common protocol data cell that does not send as yet, and moves after the common protocol data cell that will not send as yet;
Transmission then sends intersection-protocol data unit earlier opportunity, sends the common protocol data cell again.
The method of reseptance of non-conformation mode protocol data unit comprises the steps: in the radio link layer
Receiving terminal receives the lower-layer protocols data cell, judges whether to be intersection-protocol data unit according to the Length Indication position in the protocol Data Unit; Wherein, intersection-protocol data unit is that transmitting terminal will need the preferential Service Data Unit that interweaves that sends to be assembled into non-conformation mode protocol data unit and by first Length Indication position this non-conformation mode protocol data unit sign obtained in non-conformation mode protocol data unit;
If be intersection-protocol data unit, and be first intersection-protocol data unit, then receiving terminal is opened up individual buffer in addition, according to the content of Length Indication position the data in the intersection-protocol data unit is put into described individual buffer district;
After collecting for the intersection-protocol data unit that belongs to the same Service Data Unit that interweaves, reassemble into the Service Data Unit that interweaves, and send to the upper strata.
Compared with prior art, the invention has the advantages that:
The method of the invention, needs carry out that SDU burst PDU seizes or strict timed sending situation under, do not need newly-built RLC entity or use a plurality of logic channels to realize sending and receiving, just can realize that the SDU of high priority seizes the processing of low priority SDU.Effectively save system resource, reduced system complexity, improved the stability of a system.
Technical problem to be solved by this invention, technical scheme main points and beneficial effect will be in conjunction with the embodiments, are further described with reference to accompanying drawing.
Description of drawings
Fig. 1 is the radio link control schematic diagram;
Fig. 2 is the structure chart of non-conformation mode protocol data unit;
Fig. 3 is the flow chart of sending method of the present invention;
Fig. 4 is the flow chart of method of reseptance of the present invention;
Fig. 5 is the radio link control schematic diagram of band intersection-protocol data unit;
Fig. 6 sends the intersection-protocol data unit flow chart for transmitting terminal;
Fig. 7 receives the intersection-protocol data unit flow chart for receiving terminal.
Embodiment
As shown in Figure 3, be the sending method of non-conformation mode protocol data unit in the radio link layer of the present invention.
At first, transmitting terminal receives the upper-layer service data cell, according to the type of Service Data Unit, need to determine whether the preferential Service Data Unit (step 301) that interweaves that sends; If need the preferential Service Data Unit that interweaves that sends, this Service Data Unit is assembled into non-conformation mode protocol data unit, and in non-conformation mode protocol data unit, this non-conformation mode protocol data unit is designated as intersection-protocol data unit (step 302) by first Length Indication position; Then, transmitting terminal is inserted into this intersection-protocol data unit before first common protocol data cell that does not send as yet, and moves (step 303) after the common protocol data cell that will not send as yet; When transmitting terminal sends, send protocol Data Unit (step 304) according to priority orders.
In the said process, do not need preferential transmission, then handle according to the processing procedure of general service data cell if the type of Service Data Unit shows this Service Data Unit.
For, described this Service Data Unit being assembled into non-conformation mode protocol data unit, the mode that can adopt comprises, segmentation, serial connection, filling.
Here, described in non-conformation mode protocol data unit by first Length Indication position with this non-conformation mode protocol data unit be designated as intersection-protocol data unit be by, when the indication of 7 bit lengths is adopted in the Length Indication position, 1111101: represent that this protocol Data Unit is an intersection-protocol data unit; Or 1111110: represent that this protocol Data Unit is an intersection-protocol data unit.Also can be, when the indication of 15 bit lengths is adopted in the Length Indication position, 111111111111101: represent that this protocol Data Unit is an intersection-protocol data unit; Perhaps 111111111111110: represent that this protocol Data Unit is an intersection-protocol data unit.
In the said process, described transmitting terminal is inserted into this intersection-protocol data unit before first common protocol data cell that does not send as yet, and move after the common protocol data cell that will be as yet send be by, to increase for the sequence number of the common protocol data cell that sends, the amplitude of increase is the number of intersection-protocol data unit.
As shown in Figure 4, be the method for reseptance of non-conformation mode protocol data unit in the radio link layer of the present invention.
At first, receiving terminal receives the lower-layer protocols data cell, judges whether to be intersection-protocol data unit (step 401) according to the Length Indication position in the protocol Data Unit; If be intersection-protocol data unit, receiving terminal is opened up buffering in addition, according to the content of Length Indication position the data in the intersection-protocol data unit is put into buffering area (step 402); Then, after collecting for the intersection-protocol data unit that belongs to the same Service Data Unit that interweaves, reassemble into the Service Data Unit that interweaves, and send (step 403) to the upper strata.
In the said process, described receiving terminal can judge earlier whether sequence number is continuous after receiving the lower-layer protocols data cell, if continuously then abandon the content of all buffering areas, this protocol Data Unit is recombinated.If sequence number is discontinuous, judge further more then whether the type of protocol Data Unit is intersection-protocol data unit.If be judged as the common protocol data cell, then handle according to the processing procedure of common protocol data cell.
Here,, then the data division in the intersection-protocol data unit is copied in the individual buffer district, continue to receive the lower-layer protocols data cell if the intersection-protocol data unit of the described same Service Data Unit that interweaves does not collect.
In addition, what can not add change for the method for sending and receiving of non-conformation mode protocol data unit in the above-mentioned radio link layer is to be used in combination, and repeats no more here.
As shown in Figure 5, for being with the radio link control schematic diagram of intersection-protocol data unit.Wherein, the PDU of SDU1, SDU2, SDU3, SDU5, SDU6 is respectively common PDU1, PDU2, PDU3, PDU5, PDU6; The PDU of SDU4 is HPDU.When transmitting terminal is received SDU4, the PDU1 of SDU1, the PDU2 of SDU2 have been sent; The PDU3 of SDU3 has sent half, and the PDU6 of the PDU5 of SDU5, SDU6 does not also send; Then transmitting terminal preferentially sends the HPDU of SDU4, and then sends the PDU3 of remaining SDU3, and then sends out PDU5, the PDU6 of SDU6 of SDU5.
As shown in Figure 6, send the flow chart of the PDU that interweaves for transmitting terminal.
Step 601:RLC receives top layer SDU, judges that according to the SDU type if do not need preferential transmission for common SDU, then carry out the processing of common SDU, this process repeats no more herein, and flow process finishes; Need preferential the transmission if this SDU is HSDU, then change step 602 over to;
Step 602:RLC judges whether that according to the length of HSDU and the PDU length of configuration needs carry out burst, then changes step 603 if desired over to, if do not need then forward step 604 to;
Step 603: HSDU is carried out burst handle, forward step 604 to;
Step 604: judge whether that according to the length of HSDU or the PDU length of a burst PDU, configuration at last of HSDU needs are connected in series, serial connection then forwards step 605 to if desired, otherwise forwards step 606 to;
Step 605: last burst PDU of HSDU or HSDU is connected in series processing with next HSDU, forwards step 606 to;
Step 606: judge whether that according to the PDU length of the last burst PDU of the length of HSDU or HSDU, configuration needs fill, then forward step 607 if desired to, otherwise forward step 608 to;
Step 607: the remainder of HPDU is filled processing;
Step 608: HPDU is provided with distinctive LI indication;
Step 609: in outgoing queue, search and whether do not send out PDU,, otherwise forward step 612 to if forward step 610 to;
Step 610: search among the PDU that in outgoing queue, does not send out whether common PDU is arranged,, otherwise forward step 612 to if forward step 611 to;
Step 611: HPDU is put in the outgoing queue before first common PDU according to the order of sequence, and the SN value of moving common PDU after increasing, increasing degree be new insertion transmit queue HPDU number, forwards step 613 to,
Step 612: HPDU is added to the transmit queue afterbody;
Step 613: the SN that HDPU is set;
Step 614; Send each PDU according to the order in the outgoing queue, forward step 601 to.
Above-mentioned process of transmitting is a constantly process of circulation along with the continuous transmission of top layer SDU.
As shown in Figure 7, receive the flow chart of the PDU that interweaves for receiving terminal.
Step 701:RLC receives the PDU of lower floor, judges whether SN is continuous, if discontinuous then forward step 702 to, otherwise would forward step 703 to;
Step 702: the data in all buffering areas are emptied, only, forward step 701 to this PDU operation of recombinating;
Step 703: judge this PDU type according to LI indication among the PDU, if carry out the processing of common PDU for common PDU, this process repeats no more herein, forwards step 701 to; Otherwise forward step 704 to;
Step 704: judge that whether this HPDU is first HPDU, if then open up the buffering area that is independent of common PDU, forwards step 705 to; Otherwise directly forward step 705 to;
Step 705: judge whether HPDU indicates HSDU to finish,, then, the HSDU that recombinates is delivered to the upper strata, forward step 701 to the operation of recombinating of the data in this HPDU and the individual buffer district if this HPDU indication HSDU finishes; Otherwise the data division among the HPDU is copied to the individual buffer district, forward step 701 to.
The method of sending and receiving of non-conformation mode protocol data unit in a kind of radio link layer of the present invention, be not restricted to listed utilization in specification and the execution mode, it can be applied to various suitable the present invention's field fully, for those skilled in the art, can easily realize additional advantage and make amendment, therefore under the situation of the spirit and scope of the universal that does not deviate from claim and equivalency range and limited, the examples shown that the present invention is not limited to specific details, representational equipment and illustrates here and describe.
Claims (9)
1, the sending method of non-conformation mode protocol data unit in the radio link layer is characterized in that comprising the steps:
Transmitting terminal receives the upper-layer service data cell, according to the type of Service Data Unit, need to determine the preferential Service Data Unit that interweaves that sends;
To the preferential Service Data Unit that interweaves that sends of needs, this Service Data Unit that interweaves is assembled into non-conformation mode protocol data unit, and in non-conformation mode protocol data unit, this non-conformation mode protocol data unit is designated intersection-protocol data unit by first Length Indication position;
Transmitting terminal is inserted into this intersection-protocol data unit before first common protocol data cell that does not send as yet, and moves after the common protocol data cell that will not send as yet;
Transmission then sends intersection-protocol data unit earlier opportunity, sends the common protocol data cell again.
2, the sending method of non-conformation mode protocol data unit in the radio link layer according to claim 1, it is characterized in that: described this Service Data Unit that interweaves being assembled into non-conformation mode protocol data unit, is to carry out according to the judgement to burst, serial connection and the filling of Service Data Unit.
3, the sending method of non-conformation mode protocol data unit in the radio link layer according to claim 1, it is characterized in that: described in non-conformation mode protocol data unit by first Length Indication position with this non-conformation mode protocol data unit be designated intersection-protocol data unit be by, when 7 bit lengths when indication adopted in the Length Indication position, represent that with 1111101 this protocol Data Unit is intersection-protocol data unit or represents that with 1111110 this protocol Data Unit is an intersection-protocol data unit.
4, the sending method of non-conformation mode protocol data unit in the radio link layer according to claim 1, it is characterized in that: described in non-conformation mode protocol data unit by first Length Indication position with this non-conformation mode protocol data unit be designated intersection-protocol data unit be by, when 15 bit lengths when indication adopted in the Length Indication position, represent that with 111111111111101 this protocol Data Unit is intersection-protocol data unit or represents that with 111111111111110 this protocol Data Unit is an intersection-protocol data unit.。
5, the sending method of non-conformation mode protocol data unit in the radio link layer according to claim 1, it is characterized in that: described transmitting terminal is inserted into this intersection-protocol data unit before first common protocol data cell that does not send as yet, and move after the common protocol data cell that will be as yet send be by, with the not sequence number of the common protocol data cell of transmission increase as yet, the amplitude of increase is the number of intersection-protocol data unit.
6, the method for reseptance of non-conformation mode protocol data unit in the radio link layer is characterized in that comprising the steps:
Receiving terminal receives the lower-layer protocols data cell, judges whether to be intersection-protocol data unit according to the Length Indication position in the protocol Data Unit; Wherein, intersection-protocol data unit is that transmitting terminal will need the preferential Service Data Unit that interweaves that sends to be assembled into non-conformation mode protocol data unit and by first Length Indication position this non-conformation mode protocol data unit sign obtained in non-conformation mode protocol data unit;
If be intersection-protocol data unit, and be first intersection-protocol data unit, then receiving terminal is opened up the individual buffer district in addition, according to the content of Length Indication position the data in the intersection-protocol data unit is put into described individual buffer district;
After collecting for the intersection-protocol data unit that belongs to the same Service Data Unit that interweaves, reassemble into the Service Data Unit that interweaves, and send to the upper strata.
7, the method for reseptance of non-conformation mode protocol data unit in the radio link layer according to claim 6, it is characterized in that: after described receiving terminal receives the lower-layer protocols data cell, earlier judge whether sequence number is continuous, if sequence number is continuous, judge further then whether the type of protocol Data Unit is intersection-protocol data unit.
8, the method for reseptance of non-conformation mode protocol data unit in the radio link layer according to claim 6, it is characterized in that:, then handle according to the processing procedure of common protocol data cell if be judged as the common protocol data cell according to the Length Indication position in the protocol Data Unit.
9, the method for reseptance of non-conformation mode protocol data unit in the radio link layer according to claim 6, it is characterized in that: if the intersection-protocol data unit of the described same Service Data Unit that interweaves does not collect, then the data division in the intersection-protocol data unit is copied in the individual buffer district, continue to receive the lower-layer protocols data cell.
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| CNB2005100898665A CN100574330C (en) | 2005-08-09 | 2005-08-09 | The method of sending and receiving of non-conformation mode protocol data unit in the radio link layer |
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| CN101272519B (en) * | 2007-03-21 | 2012-09-19 | 上海贝尔股份有限公司 | Method, device and base station for generating protocol data unit |
| US10230665B2 (en) * | 2013-12-20 | 2019-03-12 | Intel Corporation | Hierarchical/lossless packet preemption to reduce latency jitter in flow-controlled packet-based networks |
| CN111541514B (en) * | 2015-06-29 | 2021-10-26 | 华为技术有限公司 | Message transmission method and device |
| WO2018166042A1 (en) | 2017-03-14 | 2018-09-20 | 北京小米移动软件有限公司 | Data unit transmission method and apparatus |
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