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Information sending method and system

An information sending and sending module technology, applied in transmission systems, digital transmission systems, communication between multiple stations, etc., can solve the problems of system performance degradation, scene increase, system performance loss, etc.

Active Publication Date: 2011-03-09
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] When only uplink control information is transmitted, the uplink control information is fixedly transmitted on the uplink primary component carrier, and the channel state information (CSI) of each downlink component carrier is transmitted on the primary component carrier in a time-division manner, which leads to simultaneous feedback of ACK / NACK and CSI scenarios are increasing. In the LTE system, when ACK / NACK and channel quality indicator (CQI) / precoding matrix (PMI) / rank (RI) are transmitted at the same time, it is determined whether to enable CQI / PMI / RI is dropped, and only ACK / NACK is transmitted. When CQI / PMI / RI and ACK / NACK are transmitted at the same time, ACK / NACK is mapped to two bits and fed back together with CQI / PMI / RI; There are many ACK / NACK feedback bits, and the scenarios of simultaneous transmission of ACK / NACK and CSI increase. If the processing method in the LTE system is still used, the system performance will be greatly lost. Therefore, a new ACK / NACK and CSI need to be considered. The CSI transmission scheme solves the problem of system performance degradation due to the elimination of CSI or the reduction of ACK / NACK feedback bits

Method used

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Examples

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Embodiment 1

[0135] When ACK / NACK is transmitted using single RM coded PUCCH Format 3, and W ACK / NACKs and H CSIs are simultaneously transmitted in one subframe, W ACKs / NACKs are mapped to M bits, and M ACKs / NACKs The bits and the H CSI bits are divided into two groups, each group is coded separately, the coded bits are combined and mapped to PUCCH Format 3, and the PUCCH is sent, where W, H, and M are positive integers.

[0136] In this embodiment, the manner in which W ACK / NACKs are mapped to M bits may be:

[0137] Mapping method 1: M is equal to W, one-to-one mapping, direct transmission.

[0138] Mapping mode 2: spatial AND operation (that is, mapping the ACK / NACK corresponding to the PDSCH into one ACK / NACK through a logical AND operation).

[0139]M is the maximum number of configured PDSCHs, where the mapping method is to perform an AND operation on multiple ACK / NACK bits corresponding to each PDSCH, and feed back M ACK / NACK information after the AND operation; that is, when a PDS...

example 1

[0143] Example 1: The M ACK / NACKs and the H CSI bits are sequentially connected in series and divided into two groups. Assuming that there are N bits in total, the first Bits are a group, and the remaining bits are a group;

example 2

[0144] Example 2: The H CSI bits and the M ACK / NACKs are sequentially connected in series and divided into two groups. Assuming that there are N bits in total, the first Bits are a group, and the remaining bits are a group;

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Abstract

The invention discloses an information sending method which comprises the following steps: mapping W of ACK / NACK as M bits when W of the ACK / NACK and H of channel state information CSI bits need to be simultaneously transmitted on a same subframe, wherein, W, H and M are positive integers; encoding the M of ACK / NACK bits and the H of the CSI bits after mapping; and mapping the ACK / NACK bits and the CSI bits after encoding onto a PUCCH for sending. The invention further correspondingly discloses an information sending system. The adoption of the method and the system can simultaneously transmit the ACK / NACK and the CSI, lead the number of ACK / NACK feedback bits to be greater than two bits, further ensure the maximum throughput of the system and reduce the down channel information feedback time delay.

Description

technical field [0001] The present invention relates to wireless communication technology, in particular to an information sending method and system. Background technique [0002] A radio frame (radio frame) in a Long Term Evolution (LTE, Long Term Evolution) system includes frame structures in a Frequency Division Duplex (FDD, Frequency Division Duplex) mode and a Time Division Duplex (TDD, Time Division Duplex) mode. figure 1 It is a schematic diagram of the frame structure in the prior art FDD system, such as figure 1 As shown, a wireless frame of 10 milliseconds (ms) consists of twenty slots (slots) with a length of 0.5ms and numbers 0 to 19, and slots 2i and 2i+1 form a subframe (subframe) with a length of 1ms i. figure 2 It is a schematic diagram of the frame structure in the prior art TDD system, such as figure 2 As shown, a 10ms radio frame consists of two half frames with a length of 5ms. A half frame includes five subframes with a length of 1ms. Subframe i is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00H04L1/16H04B7/26
Inventor 戴博梁春丽任璐杨维维
Owner ZTE CORP
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