CN101552658A - Method and device for transmitting status report - Google Patents
Method and device for transmitting status report Download PDFInfo
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- CN101552658A CN101552658A CNA2008100916050A CN200810091605A CN101552658A CN 101552658 A CN101552658 A CN 101552658A CN A2008100916050 A CNA2008100916050 A CN A2008100916050A CN 200810091605 A CN200810091605 A CN 200810091605A CN 101552658 A CN101552658 A CN 101552658A
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Abstract
The invention discloses a method and a device for transmitting a status report, which belong to the communication field. The method comprises the steps: generating the status report, wherein the status report comprises acknowledged data packet head serial number information and acknowledged data packet tail serial number information in a reordered data segment; and transmitting the generated status report. The device comprises a status report generation module and a transmitting module. The invention adds the acknowledged data packet head serial number information and the acknowledged data packet tail serial number information in the reordered data segment in the status report and builds the corresponding relation of the status report and the reordered data segment, thereby solving the problem of wireless resource waste caused in such a way of frequently requesting the retransmission of the same lost data packet, and improving the system performance.
Description
Technical field
The present invention relates to the communications field, particularly a kind of method and apparatus of status report.
Background technology
In data communication system, often adopt automatic request retransmission (ARQ, Automatic Repeat Request) technology to carry out error control.This technology is filled certain redundant bit in information transmitted by network-side equipment, make it have certain error detecing capability.User side equipment carries out error detection according to the rule of the correspondence butt joint breath of collecting mail, and the error detection result is formed response message feeds back to network equipment.Network equipment retransmits user side equipment according to response message and thinks wrong data, till code character does not have error code.If the code character that network equipment sends has the ability of error correction and error detection simultaneously, then be called HARQ (Hybrid-ARQ, hybrid ARQ).The ARQ technology has obtained to use widely in to the not high business of delay requirement.
Fig. 1 is the user face protocol stack schematic diagram of prior art EUTRAN (Evolved UMTS Terrestrial Radio Access Network, evolution UMTS Terrestrial radio access network) system.Wherein, and Radio Link control (Radio Link Control, RLC) layer has 3 kinds of transmission modes: be respectively AM (Acknowledge Mode, affirmation mode), UM (UnacknowledgeMode, Unacknowledged Mode) and TM (Transparent Mode, transparent mode).In the EUTRAN system, the ARQ function is carried out at rlc layer, and only at the AM pattern.The MAC of user side equipment (Medium Access Control, medium access control) layer is sent to rlc layer with the packet data delivery that receives.After rlc layer receives packet, whether orderly according to the sequence number judgment data bag in the data packet head, if then packet is directly submitted high level; If not, then judge the packet disappearance is arranged, and packet is placed in the buffer memory that reorders reorders, the generation data segment that reorders starts the timer T_reordering that reorders simultaneously, if when the timer T_reordering that reorders exceeds the time limit, the packet of disappearance is not received yet, just the packet of judging disappearance is lost, and status report (Status-report) is given network equipment, the packet that request retransmission is lost.The packet of network equipment meeting retransmission of lost after receiving this status report.Need to prove that user side equipment and network equipment can be respectively to the opposite end status report in communication process among the figure.
As shown in Figure 2, prior art provides a kind of method of status report, and is specific as follows:
Step 101: the rlc layer of the user side equipment buffer memory that reorders receives the packet that the MAC layer is submitted, and packet is reordered, and generates the data segment that reorders.
Step 102: the space whether occurs in first data segment that reorders of sequence number detection according to packet packet header.As shown in Figure 2, the space occurs in first data segment that reorders, this space corresponding data bag 2 at this moment, starts the timer T_reordering that reorders, and waits for receiving packet 2.If when T_reordering exceeds the time limit, if do not receive packet 2, then judgment data bag 2 has been lost, and execution in step 103; If before the timer T_reordering that reorders exceeds the time limit, if the packet of receiving 2, then execution in step 104.
Step 103: to the network equipment status report, the packet 2 that request retransmission is lost starts simultaneously and forbids timer (T_prohibit_timer), before forbidding that timer T_prohibit_timer exceeds the time limit, does not allow to send other any status report.
Wherein the form of status report as shown in Figure 3, D/C represents data or control, CPT represents control types, ACK_SN represents to confirm the maximum sequence number of packet, NACK_SN represents the sequence number of non-affirmation packet, E1 represents extended bit, and E2 represents extended bit, and SOstart represents that grading excursion original position, SOend represent the grading excursion end.
In this step, owing to confirm in first data segment that reorders that receives that the maximum sequence number in the packet is 3, so the ACK_SN value in this status report is 3.
Step 104: the timer T_reordering that stops to reorder, and detect the next one in the buffer memory that reorders of this moment data segment that reorders whether the space is arranged.According to Fig. 2 as can be known, in second data segment that reorders the space appears, this space correspondence be packet 5 and 7, at this moment, restart the timer T_reordering that reorders.
Step 105: when the timer T_reordering that reorders exceeds the time limit, if still do not receive packet 2,5 and 7, then to the network equipment status report, request retransmission packet 2,5,7.
In this step, owing to confirm in second data segment that reorders that receives that the maximum sequence number in the packet is 8, so the ACK_SN value in this status report is 8.
As seen, user side equipment is all asked the packet 2 of network equipment retransmission of lost in step 102 and step 104, promptly for the same packet of losing, twice re-transmission of user side equipment request, understandable, network equipment can twice this packet of losing of corresponding retransmission after receiving repeat requests.
Therefore there are the following problems at least for prior art:
The method of existing status report can cause that a side apparatus frequent requests retransmits same lost data packets in the system, and then makes opposite side equipment frequently send the packet that this is lost, and causes waste of radio resources.
Summary of the invention
In order to solve that frequent requests retransmits same lost data packets and the waste of radio resources problem that causes, the embodiment of the invention provides a kind of method and apparatus of status report.Described technical scheme is as follows:
A kind of method of status report, described method comprises:
Generate status report, comprise the first sequence number of affirmation packet in the data segment that reorders in the described status report and confirm packet tail serial number information;
Send described status report.
A kind of device of status report, described device comprises:
Status report generation module and sending module;
The status report generation module generates status report, and described status report comprises the first sequence number of affirmation packet in the data segment that reorders and confirms packet tail serial number information;
Described sending module sends the status report of described generation.
Because the restriction of status report format in the prior art, the frequent status report of one side apparatus meeting, the same lost data packets of request retransmission, and then opposite side equipment can retransmit repeatedly the same packet of losing according to status report, thereby waste Radio Resource, the described technical scheme of the embodiment of the invention is by adding the head and the tail serial number information of the affirmation packet in the data segment that reorders in status report, set up status report and the data segment corresponding relation that reorders, the i.e. packet of losing in data segment that reorders of a status report request retransmission, thereby solved that frequent requests retransmits same lost data packets and the waste of radio resources problem that causes, improved the overall performance of system.
Description of drawings
Fig. 1 is the user face protocol stack schematic diagram of EUTRAN system in the prior art;
Fig. 2 is the method schematic diagram of status report in the prior art;
Fig. 3 is a status report format schematic diagram in the prior art;
Fig. 4 is the method schematic diagram of a kind of status report of providing of the embodiment of the invention;
Fig. 5 is the improved status report format schematic diagram that the embodiment of the invention provides;
Fig. 6 is the method schematic diagram of a kind of status report of providing of the embodiment of the invention two;
Fig. 7 is the method schematic diagram of a kind of status report of providing of the embodiment of the invention three;
Fig. 8 is the method schematic diagram of a kind of status report of providing of the embodiment of the invention four.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, embodiment of the present invention is described further in detail below in conjunction with accompanying drawing.
In the embodiment of the invention, user side equipment and network equipment can exchange in the status report process, and promptly user side equipment can be to the network equipment status report, and network equipment can be to the user side equipment status report.In embodiments of the present invention, be example with user side equipment to the network equipment status report.
In embodiments of the present invention, in status report, add the head and the tail serial number information of the affirmation packet in the data segment that reorders, set up status report and the data segment corresponding relation that reorders.Concrete, be illustrated in figure 5 as the status report format after the improvement.Compared with prior art, the status report format in the present embodiment has increased by two field: ACK_SN_start (confirming the first sequence number of packet) and ACK_SN_end (confirming packet tail sequence number).Wherein, ACK_SN_start fields account 10 bits are represented the first sequence number of the affirmation packet in some data segments that reorders; ACK_SN_end fields account 10 bits are represented the last sequence number of the affirmation packet in some data segments that reorders.By the status report after improving, the embodiment of the invention can be mapped the status report and the data segment that reorders one by one, i.e. the packet of losing in data segment that reorders of each status report request retransmission.
Embodiment one
The embodiment of the invention one provides a kind of method of status report, this method is by improving status report format of the prior art, the head and the tail sequence number that in status report, comprises the affirmation packet in the data segment that reorders, the improved status report and the data segment that reorders are mapped, the packet that reorders and lose in the data segment by this improved status report request retransmission, can reduce waste of radio resources, improve the performance of entire system.The concrete steps of the embodiment of the invention are as follows:
Step 201: the rlc layer of the user side equipment buffer memory that reorders receives the packet that the MAC layer is submitted, carry out reordering of packet, generate the data segment that reorders, and reorder the space whether occurs in the data segment according to the sequence number detection of data packet head, if have, then execution in step 202.
Step 202: start the timer T_reordering that reorders, wait for the pairing packet in space that receives in this data segment that reorders.When T_reordering exceeded the time limit, if do not receive the pairing packet in space in this data segment that reorders yet, then execution in step 203; When if T_reordering does not exceed the time limit, receive the pairing packet in space in this data segment that reorders, then execution in step 204.
Wherein, the default duration of T_reordering can be configured according to service needed, can be 25ms or other numerical value.
Step 203: to the network equipment status report, the pairing packet in space in this data segment that reorders of request retransmission.
Step 204: detect the next one data segment that reorders and the space whether occurs.If have, then execution in step 202.
It will be appreciated by those skilled in the art that, data segment is the individual data segment that reorders of n (n belongs to natural number) if the next one that detects in step 204 reorders, and the space does not appear in this data segment that reorders, then detect again the next one data segment that reorders, promptly whether n+1 the data segment that reorders the space occurs, the corresponding operating of carrying out according to the result who judges is identical with the above-mentioned steps principle then, repeats no more.That is to say, carry out successively for the detection of the data segment that reorders.
Concrete, be illustrated in figure 4 as a kind of method schematic diagram of status report.At first detect the sequence number of data packet head and find the space to occur in first data segment that reorders, this space corresponding data bag 2 at this moment, starts T_reordering, waits for receiving packet 2.
Space corresponding data bag 2 in first data segment that reorders, when the timer T_reordering that reorders exceeds the time limit, if do not receive packet 2, then to the network equipment status report, the pairing packet 2 in space in first data segment that reorders of request retransmission.Because the first sequence number of the affirmation packet in first data segment that reorders that receives is 1, so the ACK_SN_start in this status report gets 1; Because the last sequence number of the affirmation packet in first data segment that reorders that receives is 3, so the ACK_SN_end in this status report gets 3.
When the timer T_reordering that reorders does not exceed the time limit,, then stop T_reordering if receive packet 2, and detect in the next sorting data section and the space occurs, this space correspondence be packet 5 and packet 7, at this moment, restart T_reordering.
When T_reordering exceeded the time limit to receive packet 5 and 7 not yet, then judgment data bag 5 and 7 was lost, and user side equipment is to the network equipment status report, the packet 5 and 7 that request retransmission reorders and loses in the data segment.Wherein, because the first sequence number of the affirmation packet in this data segment that reorders that receives is 4, so the ACK_SN_start in this status report gets 4; Because the last sequence number of the affirmation packet in this data segment that reorders that receives is 8, so the ACK_SN_end in this status report gets 8.
When T_reordering does not exceed the time limit, lose if receive packet 5 and 7, then stop T_reordering, and detect the next one and reorder the space whether occurs in the data segment, it will be appreciated by those skilled in the art that subsequent step and above-mentioned steps principle are similar, repeat no more.
The embodiment of the invention one is by adding the head and the tail serial number information of the affirmation packet in the data segment that reorders in status report, set up status report and the data segment corresponding relation that reorders, the waste of radio resources problem that causes thereby the solution frequent requests retransmits same lost data packets improves the entire system performance.
Embodiment two
The method schematic diagram of a kind of status report that provides of the embodiment of the invention two is provided.The embodiment of the invention two is similar with the embodiment of the invention one, and difference is that embodiment two is provided with status report retransmission timer T_retxt_status, in the duration of this T_retxt_status, must not retransmit the status report that had sent.Surpass the default duration of T_retxt_status when the time that status report sends, when user side equipment is not received the packet of losing yet, user side equipment will repeat to send this status report, the packet of losing with request retransmission once more.Particularly, in step 202, user side equipment can start the startup T_retxt_status that sets in advance after the network equipment status report.When T_retxt_status exceeds the time limit, if still confiscate the packet of losing 2, then send this status report to network equipment again, the packet 2 that request retransmission is lost; In like manner, in step 204, user side equipment can start the startup T_retxt_status that sets in advance after the network equipment status report.When T_retxt_status exceeds the time limit, if still confiscate the packet of losing 5 and 7, then send this status report to network equipment again, the packet 5 and 7 that request retransmission is lost.The step of other step and the embodiment of the invention one is similar, repeats no more.
Need to prove, T_retxt_status and T_reordering independent operating, the duration that T_retxt_status set in advance can be adjusted according to actual conditions, can be for 100ms, 125ms or At All Other Times.
The embodiment of the invention two is by the setting timer T_reordering that reorders, can solve that frequent requests retransmits same lost data packets and the waste of radio resources problem that causes, simultaneously by status report retransmission timer T_retxt_status is set, effective repeating transmission opportunity of state of a control report, thereby better realize the balance between the reliability of the occupancy of Radio Resource and status report, improve the overall performance of system.
Embodiment three
The method schematic diagram of a kind of status report that provides of the embodiment of the invention three is provided.The embodiment of the invention three is similar with the embodiment of the invention one, and difference is, is provided with and forbids timer T_prohibit_timer, in the duration of this T_prohibit_timer, forbids sending other status report.Concrete, in step 202, after the user side equipment status report, can start the T_prohibit_timer that sets in advance.Before T_prohibit_timer exceeds the time limit, do not allow to send again other any status report, other step and the embodiment of the invention one are similar, repeat no more.
Need to prove, the time that T_prohibit_timer set in advance, can adjust according to actual conditions, can be for 115ms, 120ms or At All Other Times.
The embodiment of the invention three is by the setting timer T_reordering that reorders, can separate that frequent requests retransmits same lost data packets and the waste of radio resources problem that causes, simultaneously by T_prohibit_timer is set, can prevent effectively that status report from frequently sending, thereby the saving Radio Resource improves the entire system performance.
Embodiment four
The method schematic diagram of a kind of status report that provides of the embodiment of the invention four is provided.The embodiment of the invention four is similar with the embodiment of the invention one, and difference is, status report retransmission timer T_retxt_status is set and forbids timer T_prohibit_timer, and the duration setting of the two can be separate with operation.Concrete, in step 202, user side equipment can start the T_retxt_status and the T_prohibit_timer that set in advance after the network equipment status report.When T_retxt_status exceeds the time limit, if still confiscate the packet of losing 2, then send this status report to network equipment again, the packet 2 that request retransmission is lost; Before T_prohibit_timer exceeds the time limit, do not allow to send again other any status report.In step 202, user side equipment can start the T_retxt_status that sets in advance when the network equipment status report.When T_retxt_status exceeds the time limit, if still confiscate the packet of losing 5 and 7, then send this status report to network equipment again, the packet 5 and 7 that request retransmission is lost, certainly, if before T_prohibit_timer exceeds the time limit, the status report of the packet that request retransmission is lost can not be sent out.Other step and the embodiment of the invention one are similar, repeat no more.
Embodiment of the invention four-way is crossed T_reordering, T_retxt_status and T_prohibit_timer is set, can solve that frequent requests retransmits same lost data packets and the waste of radio resources problem that causes, the repeating transmission opportunity of simultaneously effective state of a control report, prevent that status report from frequently sending, thereby better realize the balance between the reliability of the occupancy of Radio Resource and status report, improve the overall performance of system.
Embodiment five
The embodiment of the invention provides a kind of device of status report, and this device comprises:
The status report generation module is used to generate status report, comprises the first sequence number of affirmation packet in the data segment that reorders in this status report and confirms packet tail serial number information;
Sending module is used to send the status report of generation.
Further, this device can comprise:
Detection module is used for detecting the reception situation of data segment packet of reordering;
First trigger module is used for triggering the timer that reorders when detection module detects the data segment that reorders and the space occurs;
The timer that reorders, when being subjected to the triggering of first trigger module, this timer that reorders starts; When this timer exceeds the time limit and do not receive space pairing packet in the above-mentioned data segment that reorders, trigger the status report generation module;
Second trigger module is used for triggering and reordering timer and/or status report retransmission timer and/or forbid that timer resets when the pairing packet in space that detection module detects the above-mentioned data segment that reorders is accepting state.
Can also trigger the state retransmission timer when further, sending module sends the status report that generates; When being subjected to the triggering of sending module, the status report retransmission timer starts; Exceed the time limit at the status report retransmission timer, and when not receiving the pairing packet in space in the above-mentioned data segment that reorders, trigger the report of sending module retransmission state;
Can also trigger when further, sending module sends the status report that generates and forbid timer;
When being subjected to the triggering of sending module, forbidding that timer starts, and trigger first notification module; When this first notification module was used to be subjected to forbidding the triggering of timer, the notice sending module did not send any status report;
When forbidding that timer exceeds the time limit, trigger second notification module; When this second notification module was used to be subjected to forbidding the triggering of timer, the notice sending module can status report.
Because the restriction of status report format in the prior art, the frequent status report of one side apparatus meeting, the same lost data packets of request retransmission, and then opposite side equipment can retransmit repeatedly the same packet of losing according to status report, thereby waste Radio Resource, the described technical scheme of the embodiment of the invention is by adding the head and the tail serial number information of the affirmation packet in the data segment that reorders in status report, set up status report and the data segment corresponding relation that reorders, the i.e. packet of losing in data segment that reorders of a status report request retransmission, thereby solved that frequent requests retransmits same lost data packets and the waste of radio resources problem that causes, improved the overall performance of system.
The technical scheme that above embodiment provides can realize that software is stored on the storage medium that can read by hardware and software, as the floppy disk of computer, and hard disk or CD etc.
The above only is preferred embodiment of the present invention, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (11)
1, a kind of method of status report is characterized in that, described method comprises:
Generate status report, comprise the first sequence number of affirmation packet in the data segment that reorders in the described status report and confirm packet tail serial number information;
Send described status report.
2, the method for status report as claimed in claim 1 is characterized in that,
The described data segment that reorders is to lack in the data segment that reorders of packet the data segment that reorders of sequence number minimum.
3, the method for status report as claimed in claim 2 is characterized in that,
Generate described status report according to the accepting state of the described packet that lacks and the running status of the timer that reorders.
4, the method for status report as claimed in claim 3 is characterized in that,
Detect and start the timer that reorders when not receiving the described packet that lacks;
The described timer that reorders exceeds the time limit, and when not receiving the described packet that lacks, generates described status report.
5, the method for status report as claimed in claim 3 is characterized in that,
The described timer that reorders does not exceed the time limit, and when receiving the described packet that lacks, described sequence number value adds 1.
6, as the method for each described status report of claim 1 to 5, it is characterized in that, comprise after the described status report:
Starting state report retransmission timer;
Described status report retransmission timer exceeds the time limit, and when not receiving the space institute corresponding data bag of the described data segment that reorders, resends described status report.
7, the method for status report as claimed in claim 6 is characterized in that, comprises after the described status report:
Start and forbid timer;
Described forbid that timer exceeds the time limit after, send other status reports.
8, a kind of device of status report is characterized in that, described device comprises:
Status report generation module and sending module;
The status report generation module generates status report, and described status report comprises the first sequence number of affirmation packet in the data segment that reorders and confirms packet tail serial number information;
Described sending module sends the status report of described generation.
9, the device of status report as claimed in claim 8 is characterized in that, described device also comprises:
Detection module, first trigger module, the timer and second trigger module reorder;
Described detection module detects the reception situation of packet in the data segment that reorders;
Described first trigger module triggers the described timer that reorders when detection module detects the data segment that reorders and the space occurs;
The described timer that reorders starts when being subjected to the triggering of described first trigger module, when described timer exceeds the time limit and do not receive space pairing packet in the above-mentioned data segment that reorders, triggers described status report generation module;
Described second trigger module triggers and reorders timer and/or status report retransmission timer and/or forbid that timer resets when detection module detects the described pairing packet in space of stating the data segment that reorders and is accepting state.
10, the device of status report as claimed in claim 8 is characterized in that, described device also comprises:
The status report retransmission timer;
Described status report retransmission timer starts when described sending module sends the status report of described generation;
Exceed the time limit at described status report retransmission timer, and when not receiving the pairing packet in space in the described data segment that reorders, trigger sending module and retransmit described status report.
11, the device of status report as claimed in claim 8 is characterized in that, described device also comprises:
Forbid timer, first notification module and second notification module;
The described timer of forbidding starts when described sending module sends the status report of described generation, and triggers described first notification module;
Described first notification module notifies described sending module not send any status report when being subjected to the described triggering of forbidding timer;
Described when forbidding that timer exceeds the time limit, trigger described second notification module;
Described second notification module is notified described sending module status report when being subjected to forbidding the triggering of timer.
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| CNA2008100916050A CN101552658A (en) | 2008-04-03 | 2008-04-03 | Method and device for transmitting status report |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103841002A (en) * | 2012-11-22 | 2014-06-04 | 腾讯科技（深圳）有限公司 | Method and terminal for voice transmission, voice server and voice transmission system |
| CN106165332A (en) * | 2014-04-11 | 2016-11-23 | 高通股份有限公司 | Negate quickly the method and apparatus of acknowledgement (NACK) for sending |
| CN109756306A (en) * | 2017-11-03 | 2019-05-14 | 华为技术有限公司 | Information transferring method and communication equipment |
| CN110830185A (en) * | 2019-09-26 | 2020-02-21 | 视联动力信息技术股份有限公司 | Data transmission method and device |
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2008
- 2008-04-03 CN CNA2008100916050A patent/CN101552658A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103841002A (en) * | 2012-11-22 | 2014-06-04 | 腾讯科技（深圳）有限公司 | Method and terminal for voice transmission, voice server and voice transmission system |
| CN106165332A (en) * | 2014-04-11 | 2016-11-23 | 高通股份有限公司 | Negate quickly the method and apparatus of acknowledgement (NACK) for sending |
| US10320549B2 (en) | 2014-04-11 | 2019-06-11 | Qualcomm Incorporated | Methods and apparatus for sending fast negative acknowledgements (NACKs) |
| CN109756306A (en) * | 2017-11-03 | 2019-05-14 | 华为技术有限公司 | Information transferring method and communication equipment |
| CN109756306B (en) * | 2017-11-03 | 2023-10-03 | 华为技术有限公司 | Information transmission method and communication device |
| CN110830185A (en) * | 2019-09-26 | 2020-02-21 | 视联动力信息技术股份有限公司 | Data transmission method and device |
| CN110830185B (en) * | 2019-09-26 | 2022-08-09 | 视联动力信息技术股份有限公司 | Data transmission method and device |
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Open date: 20091007 |