CN104518852B

CN104518852B - A kind of transmission feedback method

Info

Publication number: CN104518852B
Application number: CN201310453287.9A
Authority: CN
Inventors: 王涛; 洪海
Original assignee: Potevio Institute of Technology Co Ltd
Current assignee: Potevio Institute of Technology Co Ltd
Priority date: 2013-09-29
Filing date: 2013-09-29
Publication date: 2018-06-15
Anticipated expiration: 2033-09-29
Also published as: CN104518852A

Abstract

This application discloses a kind of transmission feedback method, after receiving terminal receives data, according to the protocol Data Unit situation being currently received, according to preset second rlc status pdu format unit（RLC STATUS PDU）Form generates corresponding RLC STATUS PDU data packets, and is sent to the transmitting terminal of the data.Wherein, E3 domains and E4 domains are increased in the 2nd RLC STATUS PDU forms, to realize that RLC continuous Ps DU loses and the optimization of multiple fragment loss of same PDU indicates.The radio resource expense of RLC STATUS PDU can be greatly reduced using the present invention, improve efficiency of transmission.

Description

A kind of transmission feedback method

Technical field

The present invention relates to mobile communication technology, more particularly to a kind of transmission feedback method.

Background technology

230MHz frequency ranges are mainly used in data radio station and undertake long-range data collection task at present, because offer rate very It is low to be only used for some simple communications applications, intelligent grid and the growing business demand of Sensor Network can not be met.According to The planning in national grid future, it is desirable that find a kind of new broadband communications technologies, meet its distribution automation, load management, use Power information acquisition, smart power grid user service, emergency first-aid repair, six big field of special area video monitoring business demand.

230MHz frequency ranges product based on TD-LTE technologies provides preferable solution for the demand, constitutes new Generation low-power consumption, high spectrum utilization, the flexible multi-business communication system of high reliability.Power load can farthest be met The business need of lotus monitoring system, while plan that providing solid technological accumulation and application shows for national grid next generation network Model.

In current TD-LTE230 wireless broadband access systems, data receiver is used when feedback data transmits situation Rlc status pdu format unit defined in standard TD-LTE agreements（RLC STATUS PDU）Transformat, will Relevant information is sent to data sending terminal.

Fig. 1 is the RLC STATUS PDU transformat schematic diagrames defined in standard TD-LTE agreements.

Wherein, data/control（Data/Control, D/C）Domain, length be 1 bit, be used to indicate wireless spread-spectrum technology- Protocol Data Unit（RLC PDU）It is wireless spread-spectrum technology-data-protocol Data Unit（RLC data PDU or radio chains Road control-control-protocol Data Unit（RLC control PDU）.The specific value in D/C domains is defined as follows shown in table 1.

Thresholding	Indicate information
		0	Control PDU
1	Data PDU

Table 1

Control PDU forms（Control PDU Type, CPT）Domain, length 3bit are used to indicate RLC control PDU lattice Formula.The specific value in CPT domains is defined as follows shown in table 2.

Table 2

Confirmation message sequence number（Acknowledgement SN, ACK_SN）Domain is used to indicate first and does not receive And the sequence number of the RLC Data PDU of loss is not reported in STATUS PDU（SN）, length 10bit.

Unacknowledged information sequence number（Negative Acknowledgement SN, NACK_SN）Domain is used to indicate confirmation Pattern（AM）Lower wireless spread-spectrum technology（RLC）Entity receiving side has detected that the acknowledged mode data PDU of loss（AMD PDU）、 Or the SN of a part of AMD PDU, length 10bit.

Extension 1（Extension1bit, E1）Domain：Whether instruction includes thereafter one group of NACK_SN domain, E1 domains and E2 domains, long Spend 1bit.The specific value in E1 domains is defined as follows shown in table 3.

Table 3

Extension 2（Extension2bit, E2）Whether domain, being used to indicate thereafter has one group of SOstart and SOend domain, length For 1bit.The specific value in E2 domains is defined as follows shown in table 4.

Thresholding	Indicate information
		0	Without and then one group of SOstart and SOend domain after current NACK_SN
1	In current NACK_SN followed by one group of SOstart and SOend domain

Table 4

Lose section starting（Segment Offset start, SOstart）Domain is used to indicate the first character of lost part Save the position in AMD PDU datas domain（It is calculated by byte）, length 15bit.

Section is lost to terminate（Segment Offset end, SOend）Domain is used to indicate the last one byte of lost part Position in AMD PDU datas domain（It is calculated by byte）, length 15bit.

It is above-mentioned that the method for transmission situation is indicated using RLC STATUS PDU transformats, suitable for wireless broadband Internet access System, and during applied to wireless narrow band access system, then it can there are the following problems：

1st, the multiple PDU continuously lost are needed to provide corresponding NACK_SN domain informations respectively for each PDU, this Sample works as wireless spread-spectrum technology（RLC）During layer continual data package dropout, the STATUS PDU of feedback will be larger, so as to cause wirelessly to provide Source expense is big.

2nd, for multiple and different loss sections of a PDU, need that each loss section will be distributed provide it is corresponding NACK_SN domain informations, in this way, will be lost in PDU segment number it is more when, the NACK_SN domains expense repeated is larger, so as to meeting The STATUS PDU for leading to feedback are larger, and radio resource expense is big.

In view of 230 systems based on TD-LTE standards need that wireless narrow band access is supported to transmit, it is supplied to each use at this time Family bandwidth is smaller, in order to adapt to the transmission of small TB blocks, improves valid data transmission efficiency, needs to reduce RLC STATUS to the greatest extent The expense of PDU.Therefore, the above-mentioned RLC STATUS PDU transformats suitable for wireless broadband access system are due to the above problem Presence, the transmission performance needs of 230 systems can not be met.

Invention content

In view of this, it is a primary object of the present invention to provide a kind of transmission feedback method, this method can effectively reduce RLC The expense of STATUS PDU.

In order to achieve the above object, technical solution proposed by the present invention is：

A kind of transmission feedback method, including：

After receiving terminal receives data, according to the protocol Data Unit situation being currently received, according to preset second Rlc status pdu format unit R LC STATUS PDU forms, generate corresponding RLC STATUS PDU datas Packet；

Wherein, when carrying out the generation, meet if there is a protocol Data Unit PDU：The data of the PDU are all lost It loses and there are at least one PDU that loss of data occurs thereafter, then increase an E3 domain after the corresponding E2 domains of the PDU, The E3 domains are used to indicate since the PDU sequence numbers indicated by the corresponding NACK_SN domains of this PDU to next NACK_SN domains PDU in the range of until indicated PDU sequence numbers continuously loses or is used to indicate next NACK_SN domains and is not used in connection The corresponding NACK_SN domains of this PDU are closed to indicate that PDU continuously loses；If multiple fragment loss of a PDU, at this PDU pairs The SOstart domains of each segmentation and SOend domains, and difference after each SOend domains wherein are successively increased after the NACK_SN domains answered Increase an E4 domain, the E4 domains be used to indicate after this E4 domains whether PDU indicated by followed by current NACK_SN domains other The SOstart domains of segmentation and Soend domains；

The RLC STATUS PDU data packets are sent to the transmitting terminal of the data by the receiving terminal.

In conclusion transmission feedback method proposed by the present invention, it is next to introduce E3 domains in RLC STATUS PDU data packets It indicates the PDU continuously lost, introduces E4 domains to indicate multiple segmentations of same PDU loss, in this way, RLC can be greatly lowered The repetition expense in NACK_SN domains in STATUS PDU data packets realizes the continuous multiple segmentations for losing PDU and same PDU Optimization instruction so as to effectively reduce the expense of RLC STATUS PDU, improves data transmission efficiency.

Description of the drawings

Fig. 1 is the RLC STATUS PDU transformat schematic diagrames defined in standard TD-LTE agreements；

Fig. 2 is the method flow schematic diagram of the embodiment of the present invention one.

Specific embodiment

To make the object, technical solutions and advantages of the present invention clearer, it is right below in conjunction with the accompanying drawings and the specific embodiments The present invention is described in further detail.

The present invention core concept be：Increase E3 domains and E4 domains, realize RLC continuous Ps DU lose and same PDU it is multiple The optimization instruction of fragment loss, so that RLC STATUS PDU are small as possible, reach and reduces radio resource expense, improve efficiency of transmission Purpose.

Fig. 2 is the flow diagram of the embodiment of the present invention one, as shown in Fig. 2, the transmission feedback method of the embodiment is main Include the following steps：

Step 201, after receiving terminal receives data, according to the protocol Data Unit situation being currently received, according to pre- If the second rlc status pdu format unit（RLC STATUS PDU）Form generates corresponding RLC STATUS PDU data packet.

Wherein, when carrying out the generation, meet if there is a protocol Data Unit PDU：The data of the PDU are all lost It loses and there are at least one PDU that loss of data occurs thereafter, then increase an E3 domain after the corresponding E2 domains of the PDU, The E3 domains are used to indicate since the PDU sequence numbers indicated by the corresponding NACK_SN domains of this PDU to next NACK_SN domains PDU in the range of until indicated PDU sequence numbers continuously loses or is used to indicate next NACK_SN domains and is not used in connection Close the function that the corresponding NACK_SN domains instruction PDU of this PDU continuously lose；If multiple fragment loss of a PDU, at this Successively increase the SOstart domains of each segmentation and SOend domains after the corresponding NACK_SN domains of PDU, and wherein each SOend domains it Increase an E4 domain respectively afterwards, the E4 domains be used to indicate after this E4 domains whether PDU indicated by followed by current NACK_SN domains Other segmentation SOstart domains and Soend domains.

In this step, new RLC STATUS PDU forms i.e. the 2nd RLC STATUS PDU forms are introduced, to generate The RLC STATUS PDU forms of RLC STATUS PDU data packets, the 2nd RLC STATUS PDU forms and existing system are not Same is the introduction of E3 domains and E4 domains, and the meaning in other domains is then identical, and details are not described herein.

Here, as the PDU that the data of PDU are all lost and loss of data occurs there are at least one thereafter, E1 domains after the corresponding NACK_SN domains of the PDU are 1 and E2 domains are 0.At this point, the PDU of loss of data occurs after the PDU The PDU that several generation total datas are lost immediately after is likely to be, in this way, can realize that PDU continuously loses using E3 domains Instruction.In this way, will not need to indicate multiple PDU continuously lost with multiple NACK_SN domains, and only need with two from beginning to end NACK_SN domains indicate, so as to which the expense in NACK_SN domains is greatly reduced.

After introducing E4 domains in this step, multiple loss of same PDU point can be indicated using only a NACK_SN domain Section, in this way, it is possible to reduce the expense in NACK_SN domains is repeated, so as to which the expense in NACK_SN domains is greatly reduced.

Preferably, the value in the E3 domains can be configured to 1, to indicate from indicated by the corresponding NACK_SN domains of this PDU PDU sequence numbers start until the PDU sequence numbers indicated by next NACK_SN domains in the range of PDU continuously lose；By institute The value for stating E3 domains is configured to 0, combines the corresponding NACK_SN domains instructions of this PDU to indicate that next NACK_SN domains are not used in The function that PDU continuously loses.

Preferably, the value in the E4 domains can be configured to 1, to indicate followed by current NACK_SN after this E4 domains The SOstart domains of other segmentations of PDU indicated by domain and Soend domains；The value in the E4 domains is configured to 0, to indicate this E4 There is no the SOstart domains of other segmentations of PDU indicated by current NACK_SN domains and Soend domains after domain.

The RLC STATUS PDU data packets are sent to the transmitting terminal of the data by step 202, the receiving terminal.

Preferably, in order to improve the present invention and the compatibility of existing system, the RLC STATUS PDU numbers can be utilized Indicate that the Format Type of RLC STATUS PDU data packets is the 2nd RLC STATUS according to the control PDU Type C PT domains in packet PDU forms.Specifically, any one can be selected not make from the reservation thresholding of the RLC STATUS PDU forms of existing system Value, as the CPT thresholdings for being used to indicate the 2nd RLC STATUS PDU forms.For example, it could be provided as 001.

In conclusion the foregoing is merely a prefered embodiment of the invention, it is not intended to limit the scope of the present invention. All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in the present invention's Within protection domain.

Claims

1. a kind of transmission feedback method, which is characterized in that including：

It is wireless according to preset second according to the protocol Data Unit situation being currently received after receiving terminal receives data RLC status protocol Data Unit RLC STATUS PDU forms, generate corresponding RLC STATUS PDU data packets；

Wherein, when carrying out the generation, meet if there is a protocol Data Unit PDU：The data of the PDU are all lost simultaneously And there are at least one PDU that loss of data occurs thereafter, then increase an E3 domain after the corresponding E2 domains of the PDU, it is described E3 domains are used to indicate since the PDU sequence numbers indicated by the corresponding NACK_SN domains of this PDU to next NACK_SN domains meaning PDU in the range of until the PDU sequence numbers shown continuously loses or is used to indicate next NACK_SN domains and is not used in joint originally PDU corresponding NACK_SN domains indicate that PDU continuously loses；If multiple fragment loss of a PDU, corresponding in the PDU The SOstart domains of each segmentation and SOend domains are successively increased after NACK_SN domains, and is increased respectively after each SOend domains wherein One E4 domain, the E4 domains be used to indicate after this E4 domains whether other segmentations of PDU indicated by followed by current NACK_SN domains SOstart domains and SOend domains；

2. according to the method described in claim 1, it is characterized in that, when the value in the E3 domains is 1, indicate from this PDU pairs The PDU sequence numbers indicated by NACK_SN domains answered start the range until the PDU sequence numbers indicated by next NACK_SN domains Interior PDU continuously loses；

When the value in the E3 domains is 0, indicates that next NACK_SN domains are not used in and combine the corresponding NACK_SN domains of this PDU Instruction PDU continuously loses.

3. according to the method described in claim 1, it is characterized in that, when the value in the E4 domains is 1, after indicating this E4 domains The SOstart domains of other segmentations of PDU indicated by followed by current NACK_SN domains and SOend domains；

When the value in the E4 domains is 0, indicate that other points of PDU indicated by current NACK_SN domains are not present in this E4 domains later The SOstart domains of section and SOend domains.

4. according to the method described in claim 1, it is characterized in that, the method further includes：

The RLC STATUS PDU numbers are indicated using the control PDU Type C PT domains in the RLC STATUS PDU data packets Form according to packet is the 2nd RLC STATUS PDU forms.

5. according to the method described in claim 4, it is characterized in that, the value in the CPT domains is 001.