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Method for generating ACK/NACK information

A resource and data technology, applied in the field of wireless communication systems, can solve problems such as downlink throughput loss and achieve the effect of improving downlink throughput

Inactive Publication Date: 2010-02-10
SAMSUNG ELECTRONICS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In fact, the ability to send ACK / NACK in the uplink direction is 4 ACK / NACK bits, and ACK / NACK feedback can be performed for each subframe separately, so image 3 The approach shown results in a loss of downstream throughput

Method used

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  • Method for generating ACK/NACK information
  • Method for generating ACK/NACK information
  • Method for generating ACK/NACK information

Examples

Experimental program
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Effect test

Embodiment 1

[0046] Assuming that the uplink direction supports sending ACK / NACK information of up to M bits at the same time, the number N' of downlink resources for which data is sent for the user equipment. Logically number N' downlink resources that have sent data, so that a grouping method is to first allocate C + contains K + groups of downlink resources, and then allocate C - contains K - A group of downlink resources.

[0047] Taking the downlink-uplink configuration number 5 of LTE TDD as an example, the ACK / NACK information of the downlink data in up to 9 subframes needs to be transmitted in the same uplink subframe, and the uplink subframe supports sending up to 4 bits of ACK / NACK information . Such as Figure 5 Shown is a specific example of this method. Here, it is assumed that the base station sends downlink data for the user equipment within 6 downlink subframes, and these 6 subframes are subframe 1 and subframe 4 to subframe 8 respectively. According to the method of ...

Embodiment 2

[0049] Assuming that the uplink direction supports sending ACK / NACK information of up to M bits at the same time, the number N' of downlink resources for which data is sent for the user equipment. Note that the logical numbers of the N' downlink resources that have sent data are respectively n, n=0, 1, ..., N'-1, then the downlink resources with logical number intervals of M can be divided into a group. In this way, it can be defined that the logical numbers of the downlink resources included in the mth group satisfy m=mod(n, M), m=0, 1, . . . M-1.

[0050] Taking LTE TDD downlink-uplink configuration 5 as an example, the ACK / NACK information of downlink data in up to 9 subframes needs to be transmitted in the same uplink subframe, and the uplink subframe supports sending 4-bit ACK / NACK information at most. Such as Figure 6 Shown is a specific example of this method. Here, it is assumed that the base station sends downlink data for the user equipment within 6 downlink subfra...

Embodiment 3

[0052] Taking LTE TDD downlink-uplink configuration 5 as an example, the ACK / NACK information of downlink data in up to 9 subframes needs to be transmitted in the same uplink subframe, and the uplink subframe supports sending 4-bit ACK / NACK information at most. Such as Figure 7 What is shown is another specific example of the present invention, where it is assumed that the base station only sends downlink data for the user equipment within 3 downlink subframes, and these 3 subframes are subframe 1 to subframe 3 respectively. According to the method of the present invention, firstly, the three subframes in which downlink data are sent are processed, and each subframe corresponds to one bit. When the subframe does not use MIMO technology, directly obtain the 1-bit ACK / NACK information of a subframe; when the subframe uses MIMO technology, process the two-bit ACK / NACK information in a subframe to obtain the ACK / NACK information to be sent 1-bit ACK / NACK information. That is, w...

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Abstract

The invention relates to a method for generating ACK / NACK information, which comprises the following steps that: the number of downlink resources for sending data to user equipment by a base station is N', N' pieces of ACK / NACK information exist aiming at the N' downlink resources, the number of ACK / NACK bits sent in an uplink subframe is M, and when N' is more than or equal to M, the N' downlinkresources after sending the data are divided into M groups, and each group of the downlink resources outputs one piece of ACK / NACK or DTX information in a binding mode; and the user equipment sends the ACK / NACK or DTX information in the uplink subframe. The method fully uses the capability of sending multi-bit ACK / NACK in the uplink direction, and can improve the downlink throughput.

Description

technical field [0001] The present invention relates to a wireless communication system, more specifically to a method for generating ACK / NACK information in the wireless communication system. Background technique [0002] The 3GPP standardization organization is conducting long-term evolution (LTE) of its existing system specifications. figure 1 It is the frame structure of the LTE TDD system. Each length is 307200×T s = The wireless frame of 10ms is equally divided into two lengths of 153600×T s = half frame of 5 ms. Each half frame contains 8 lengths of 15360T s = 0.5ms time slot and 3 special domains, namely downlink pilot time slot (DwPTS), guard interval (GP) and uplink pilot time slot (UpPTS), the sum of the length of these 3 special domains is 30720T s = 1 ms. Each subframe consists of two consecutive time slots, that is, the kth subframe includes time slot 2k and time slot 2k+1. Subframe 1 and subframe 6 include the above three special fields. For example, T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W72/04H04B7/26
Inventor 李迎阳李小强
Owner SAMSUNG ELECTRONICS CO LTD
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