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Hybrid automatic repeat request-based repeat resource distribution method

A hybrid automatic retransmission and resource allocation technology, applied in the directions of transmission path sub-channel allocation, signaling allocation, transmission system, etc., can solve problems such as incorrect transmission and collision of data packets, reduce bit error rate and improve transmission efficiency. Effect

Active Publication Date: 2014-03-19
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] like image 3 As shown, when terminal 1 fails to send a data packet, the base station will give terminal 1 a NACK, and may send a UL Basic Assignment A-MAP IE to terminal 1 at the same time. If terminal 1 receives this UL Basic Assignment A-MAP IE, it will Send the retransmission packet according to the new resource sending position B, and if it does not receive the UL Basic Assignment A-MAP IE Terminal 1 will still send the data packet according to the previous resource sending position A, and the resource sending position A may have been assigned to Terminal 2 is used. In this way, terminal 1 and terminal 2 share a resource transmission location to send data, which will cause collisions, so that the two data packets cannot be transmitted correctly.

Method used

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  • Hybrid automatic repeat request-based repeat resource distribution method
  • Hybrid automatic repeat request-based repeat resource distribution method
  • Hybrid automatic repeat request-based repeat resource distribution method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0092] In this embodiment, the uplink basic assignment A-MAP IE (UL BasicAssignment A-MAP IE, hereinafter also referred to as A-MAP IE) in the communication system is used as the downlink control signaling, and a bit in the A-MAP IE bit as ReAssignment indication information. If ReAssignment=0, it means that this UL Basic Assignment A-MAP IE is an A-MAP IE for a new data packet. After analyzing it, the terminal immediately sends the data packet according to the indicated transmission method, and the base station also receives the data packet according to the corresponding transmission method. ; If ReAssignment=1, it means that this ULBasic Assignment A-MAP IE is a re-allocation of resources for retransmission data packets.

[0093] The resource sending position in the transmission mode is taken as an example below to further describe the retransmission resource allocation process. like Figure 4 As shown, according to the A-MAP IE sent by the base station, when the terminal ...

Embodiment 2

[0097] The implementation process of this embodiment is basically the same as that of Embodiment 1, and the base station also needs to allocate an uplink HARQ feedback channel for A-MAPIE, and the base station will allocate resources in a new way after receiving the ACK sent by the terminal, that is to say It takes one frame to take effect.

[0098] The difference from Embodiment 1 is that this embodiment makes certain improvements on the basis of Embodiment 1, and defines a brand new A-MAP IE signaling, that is, the uplink basic reassignment information element (ULBasic ReAssignment A-MAP ie). In this embodiment, the base station does not need to include indication information in the downlink control signaling, but indicates whether the transmission mode of the terminal changes through two types of signaling, UL Assignment A-MAP IE and UL ReAssignment A-MAP IE. When the base station needs to instruct the terminal to change the transmission mode, it notifies the terminal of t...

Embodiment 3

[0100] This embodiment is further optimized on the basis of Embodiment 1 and Embodiment 2. No new A-MAP IE signaling is required, and a Reserved (reserved) in the existing UL Basic Assignment A-MAP IE is still used. Bits are used as ReAssignment indication information. When ReAssignment=0, the format of other information in the UL Basic Assignment A-MAP IE remains unchanged, and the content is still 56bit. When Re Assignment=1, the content of the information sent in the initial UL Basic Assignment A-MAP IE can be saved Go, therefore, can save some overhead.

[0101] In fact, the difference between this embodiment and the second embodiment is that when ReAssignment=1, instead of defining a new signaling type, certain modifications are made to the current UL Basic AssignmentA-MAP IE, The information already contained in the UL Basic AssignmentA-MAP IE sent for the first time and which cannot be changed, such as the signaling Long TTI Indicator indicating the length of the subpack...

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Abstract

A method for assigning re-transmission resources based on Hybrid Automatic Repeat Request (HARQ) includes the following steps: when a terminal fails in sending the data packet for N-th time and / or a base station fails in receiving the data packet for N-th time, in a down-link control signaling sent to the terminal, the base station indicates a transmission mode change for re-transmission of the data packet; the terminal receives and parses the down-link control signaling, and sends an Acknowledgement (ACK) at a up-link feedback channel position, and re-transmits the data packet for N+s-th time according to the new transmission mode; and after the base station receives the ACK sent from the terminal, it assigns the up-link resources according to new resource assignment mode; wherein, N and s are natural numbers, and N+s is less than or equal to the maximum re-transmission number. The present invention solves the problem that conflict may occur when the multiple up-link users share one channel to send data, reduces the code error rate, and improves the system transmission efficiency.

Description

technical field [0001] The present invention relates to the communication field, in particular to a retransmission resource allocation method based on Hybrid Automatic Repeat Request (HARQ for short). Background technique [0002] The HARQ technology is an improvement on the traditional automatic repeat request (Automatic Repeat Request, ARQ for short) technology. HARQ technology combines ARQ technology and forward error correction (Forward Error Connection, referred to as FEC) technology, thereby reducing the influence of time-varying fading channel on the bit error rate of received data, so that the wireless communication system can provide higher and more stable data throughput. HARQ is currently the mainstream 4G (4 th Generation, the 4th generation mobile communication technology) system, such as Long-Term Evolution (LTE for short) system and one of the key technologies of IEEE (Institute of Electrical and Electronics Engineers, Institute of Electrical and Electronic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/18H04L1/16H04L1/00H04B7/26
CPCH04L5/0053H04L1/1861
Inventor 宁丁关艳峰鲁照华孙波方惠英陈宪明
Owner ZTE CORP
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