CN105681001A - Method and device for realizing RLC (Radio Link Control) layer retransmission - Google Patents
Method and device for realizing RLC (Radio Link Control) layer retransmission Download PDFInfo
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- CN105681001A CN105681001A CN201410674863.7A CN201410674863A CN105681001A CN 105681001 A CN105681001 A CN 105681001A CN 201410674863 A CN201410674863 A CN 201410674863A CN 105681001 A CN105681001 A CN 105681001A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
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- Mobile Radio Communication Systems (AREA)
- Detection And Prevention Of Errors In Transmission (AREA)
Abstract
The invention discloses a method and a device for realizing RLC (Radio Link Control) layer retransmission. The method comprises the following steps that: a media access control (MAC) layer of an evolved node B (eNodeB) transmits hybrid automatic repeat request (HARQ) new transmission to an MAC layer of user equipment (UE); and when the MAC layer of the eNodeB does not receive an acknowledgement (ACK) and a negative acknowledgement (NACK) of the MAC layer of the UE, the MAC layer of the eNodeB does not perform HARQ retransmission, and instructs an RLC layer to perform automatic repeat request (ARQ) retransmission. Through the scheme of the invention, delay of retransmission is shortened, and air interface resources are saved.
Description
Technical field
The present invention relates to autonomous retransmission technology, espespecially one realizes the method and apparatus that wireless spread-spectrum technology (RLC, RadioLinkControl) layer retransmits.
Background technology
Fig. 1 is the air interface protocols schematic diagram of Long Term Evolution (LTE, LongTermEvolution) network. Referring to Fig. 1, LTE network ensures the transmission reliability of air interface from two aspects, and one is the HARQ (ARQ, AutomaticRepeatreQuest) of rlc layer affirmation mode (AM, AcknowledgedMode); Two is the hybrid automatic repeat-request (HARQ, HybridARQ) of medium education (MAC, MediumAccessControl) layer.
HARQ transmission is divided into new biography and re-transmission, if HARQ retransmits exceedes maximum times, then HARQ retransmits unsuccessfully, subscriber equipment (UE, UserEquipment) the rlc layer node B (eNodeB by state report notification evolution, EvolvedNodeB) rlc layer, then corresponding message is retransmitted by the rlc layer of eNodeB. Owing to ARQ retransmits higher than HARQ retransmits the protocol hierarchy related to, so time delay is also just bigger. In order to reduce retransmission delay time, after HARQ failure, the MAC layer of eNodeB can directly notify that rlc layer carries out ARQ re-transmission, it is not necessary to waits the state report of UERLC layer.
The unit of HARQ transmission is TB, and a TB is exactly the data block comprising MAC message. TB size is specified by MCS index, and MCS index has 5 bits (bit), but only uses 29 kinds of combinations (0～28), and remaining 3 kinds of combinations (29～31) are reserved, and these 3 kinds of combinations are served only for retransmitting. Due to transmission block (TB, TransportBlock) size is typically in the Downlink Control Information (DCI of new biography, DownlinkControlInformation) by modulating and encoding scheme (MCS in, ModulationandCodingScheme) index is specified, and TB size is constant during HARQ re-transmission, the DCI therefore retransmitted will not indicate the size of TB again. If UE is not successfully received the DCI in new biography, then UE is not owing to knowing the size of TB after receiving the HARQ message retransmitted, and causes that UE demodulates unsuccessfully. UE demodulates can send non-acknowledgement response (NACK, NegativeAcknowledgement) to eNodeB after unsuccessfully, thus triggering ARQ, therefore, the time delay that rlc layer retransmits is very long.
Summary of the invention
In order to solve the problems referred to above, the present invention proposes a kind of method and apparatus realizing rlc layer re-transmission, it is possible to reduce retransmission delay time.
In order to achieve the above object, the present invention proposes a kind of method realizing the re-transmission of wireless spread-spectrum technology rlc layer, including:
The media access control MAC layer of the node BeNodeB of evolution sends hybrid automatic repeat-request HARQ new biography to the MAC layer of user equipment (UE);
When the MAC layer of eNodeB does not receive the confirmation response ACK and non-acknowledgement response NACK of the MAC layer of UE, the MAC layer of eNodeB does not carry out HARQ re-transmission, and notifies that rlc layer carries out HARQ ARQ re-transmission.
Preferably, when the MAC layer of described eNodeB receives the non-acknowledgement response NACK of the MAC layer of described UE, the method also includes:
The MAC layer of described eNodeB carries out HARQ re-transmission.
The invention allows for a kind of device realizing the re-transmission of wireless spread-spectrum technology rlc layer, at least include:
Sending module, for sending hybrid automatic repeat-request HARQ new biography to the MAC layer of user equipment (UE);
Notification module, for when MAC layer is not received by ACK and the NACK of MAC layer of UE, not carrying out HARQ re-transmission, and notify that rlc layer carries out HARQ ARQ re-transmission.
Preferably, described sending module is additionally operable to:
When MAC layer receives the non-acknowledgement response NACK of the MAC layer of described UE, MAC layer carries out HARQ re-transmission.
Compared with prior art, the present invention includes: the MAC layer of eNodeB sends HARQ new biography to the MAC layer of UE; When the MAC layer of eNodeB does not receive ACK and the NACK of MAC layer of UE, the MAC layer of eNodeB does not carry out HARQ re-transmission, and notifies that rlc layer carries out ARQ re-transmission. Pass through the solution of the present invention, during owing to not receiving ACK or NACK of the MAC layer of UE at the MAC of eNodeB, notice rlc layer carries out ARQ re-transmission immediately, retransmit without proceeding HARQ, thus reducing the time delay of re-transmission, and eliminate insignificant HARQ to retransmit, thus save the air interface resource of preciousness.
Accompanying drawing explanation
Below the accompanying drawing in the embodiment of the present invention being illustrated, the accompanying drawing in embodiment is for a further understanding of the present invention, is used for explaining the present invention, is not intended that limiting the scope of the invention together with description.
Fig. 1 is the air interface protocols schematic diagram of existing LTE network;
Fig. 2 is the flow chart that the present invention realizes the method that rlc layer retransmits;
Fig. 3 present invention realizes the flow chart of the specific embodiment of the method that rlc layer retransmits.
Detailed description of the invention
For the ease of the understanding of those skilled in the art, below in conjunction with accompanying drawing, the invention will be further described, can not be used for limiting the scope of the invention. It should be noted that when not conflicting, the embodiment in the application and the various modes in embodiment can be mutually combined.
Referring to Fig. 2, the present invention proposes a kind of method realizing rlc layer re-transmission, including:
Step 200, eNodeB MAC layer from MAC layer to UE send HARQ new biography.
In this step, HARQ new biography includes DCI and corresponding data.
First DCI is detected by the MAC layer of UE, obtains data according to the DCI that detection obtains. When the MAC layer of UE is successfully obtained data, send ACK to eNodeB; When the unsuccessful acquisition data of the MAC layer of UE, send NACK to eNodeB.
When the MAC layer of UE is not detected by DCI, the MAC layer of UE will not send ACK and NACK to eNodeB.
Step 201, when the MAC layer of eNodeB does not receive confirmation response (ACK, Acknowledgement) of the MAC layer of UE and during NACK, the MAC layer of eNodeB does not carry out HARQ re-transmission, and transmission message informing rlc layer carries out ARQ re-transmission immediately.
In this step, when the MAC layer of eNodeB receives the NACK of the MAC layer of UE, the MAC layer of eNodeB carries out HARQ re-transmission.
Below by the method that specific embodiment describes the present invention in detail.
As it is shown on figure 3, the method includes:
Step 300, eNodeBRLC layer send rlc protocol data cell (PDU, ProtocolDataUnit) to MAC layer.
In this step, RLCPDU is ARQ new biography or ARQ re-transmission.
Step 301, eNodeB MAC layer to UEMAC layer send MACPDU.
In this step, MACPDU is the new biography of HARQ.
If step 302 eNodeBMAC layer does not receive ACK and the NACK of the MAC layer of UE, then the MAC layer of eNodeB does not carry out HARQ re-transmission, and notifies the rlc layer of eNodeB immediately, and corresponding RLCPDU is retransmitted.
In this step, if eNodeBMAC layer receives the NACK of the MAC layer of UE, then the MAC layer of eNodeB carries out HARQ re-transmission.
The invention allows for a kind of device realizing rlc layer re-transmission, at least include:
Sending module, for sending HARQ new biography to the MAC layer of UE;
Notification module, for when MAC layer is not received by ACK and the NACK of MAC layer of UE, not carrying out HARQ re-transmission, and notify that rlc layer carries out ARQ re-transmission.
In assembly of the invention, sending module is additionally operable to:
When MAC layer receives the NACK of the MAC layer of UE, MAC layer carries out HARQ re-transmission.
It should be noted that; embodiment described above is for only for ease of those skilled in the art and understands; it is not limited to protection scope of the present invention; under the premise without departing from the inventive concept of the present invention, those skilled in the art to the made any apparent replacement and improvement etc. of the present invention all within protection scope of the present invention.
Claims (4)
1. one kind realizes the method that wireless spread-spectrum technology rlc layer retransmits, it is characterised in that including:
The media access control MAC layer of the node BeNodeB of evolution sends hybrid automatic repeat-request HARQ new biography to the MAC layer of user equipment (UE);
When the MAC layer of eNodeB does not receive the confirmation response ACK and non-acknowledgement response NACK of the MAC layer of UE, the MAC layer of eNodeB does not carry out HARQ re-transmission, and notifies that rlc layer carries out HARQ ARQ re-transmission.
2. method according to claim 1, it is characterised in that when the MAC layer of described eNodeB receives the non-acknowledgement response NACK of the MAC layer of described UE, the method also includes:
The MAC layer of described eNodeB carries out HARQ re-transmission.
3. one kind realizes the device that wireless spread-spectrum technology rlc layer retransmits, it is characterised in that at least include:
Sending module, for sending hybrid automatic repeat-request HARQ new biography to the MAC layer of user equipment (UE);
Notification module, for when MAC layer is not received by ACK and the NACK of MAC layer of UE, not carrying out HARQ re-transmission, and notify that rlc layer carries out HARQ ARQ re-transmission.
4. device according to claim 3, it is characterised in that described sending module is additionally operable to:
When MAC layer receives the non-acknowledgement response NACK of the MAC layer of described UE, MAC layer carries out HARQ re-transmission.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410674863.7A CN105681001B (en) | 2014-11-21 | 2014-11-21 | Method and device for realizing RLC layer retransmission |
| PCT/CN2015/077419 WO2016078328A1 (en) | 2014-11-21 | 2015-04-24 | Automatic retransmission method and apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410674863.7A CN105681001B (en) | 2014-11-21 | 2014-11-21 | Method and device for realizing RLC layer retransmission |
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| Publication Number | Publication Date |
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| CN105681001A true CN105681001A (en) | 2016-06-15 |
| CN105681001B CN105681001B (en) | 2020-01-03 |
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| CN201410674863.7A Active CN105681001B (en) | 2014-11-21 | 2014-11-21 | Method and device for realizing RLC layer retransmission |
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| WO (1) | WO2016078328A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107612664A (en) * | 2017-10-25 | 2018-01-19 | 京信通信系统（中国）有限公司 | A kind of wireless chain control layer RLC data repeating methods, device and storage medium |
| WO2019127533A1 (en) * | 2017-12-29 | 2019-07-04 | 深圳市大疆创新科技有限公司 | Feedback determination method, sending end, receiving end and system |
| CN116015565A (en) * | 2022-12-07 | 2023-04-25 | 哲库科技(北京)有限公司 | Data retransmission method, device, equipment and storage medium |
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| CN101060386A (en) * | 2006-04-17 | 2007-10-24 | 华为技术有限公司 | Hybrid automatic forward request entity and its data block submission method |
| CN101132257A (en) * | 2006-08-24 | 2008-02-27 | 华为技术有限公司 | Condition report transmission method and sending terminal equipment thereof |
| CN101330454A (en) * | 2007-06-22 | 2008-12-24 | 中兴通讯股份有限公司 | High speed uplink grouping accessing method for multi-carrier system |
| CN101335979A (en) * | 2007-06-25 | 2008-12-31 | 中兴通讯股份有限公司 | High-speed uplink packet access method of multi-carrier system |
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2014
- 2014-11-21 CN CN201410674863.7A patent/CN105681001B/en active Active
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2015
- 2015-04-24 WO PCT/CN2015/077419 patent/WO2016078328A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101060386A (en) * | 2006-04-17 | 2007-10-24 | 华为技术有限公司 | Hybrid automatic forward request entity and its data block submission method |
| CN101132257A (en) * | 2006-08-24 | 2008-02-27 | 华为技术有限公司 | Condition report transmission method and sending terminal equipment thereof |
| CN101330454A (en) * | 2007-06-22 | 2008-12-24 | 中兴通讯股份有限公司 | High speed uplink grouping accessing method for multi-carrier system |
| CN101335979A (en) * | 2007-06-25 | 2008-12-31 | 中兴通讯股份有限公司 | High-speed uplink packet access method of multi-carrier system |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107612664A (en) * | 2017-10-25 | 2018-01-19 | 京信通信系统（中国）有限公司 | A kind of wireless chain control layer RLC data repeating methods, device and storage medium |
| WO2019127533A1 (en) * | 2017-12-29 | 2019-07-04 | 深圳市大疆创新科技有限公司 | Feedback determination method, sending end, receiving end and system |
| CN116015565A (en) * | 2022-12-07 | 2023-04-25 | 哲库科技(北京)有限公司 | Data retransmission method, device, equipment and storage medium |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105681001B (en) | 2020-01-03 |
| WO2016078328A1 (en) | 2016-05-26 |
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