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Transmission method of downlink feedback information, base station and relay node

A relay node and feedback information technology, applied in the field of communication, can solve the problem of high signaling overhead, and achieve the effect of low signaling overhead

Inactive Publication Date: 2015-10-21
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention is proposed in view of the problem of large signaling overhead or the need to introduce a new physical channel in the scheme of implementing the HARQ retransmission mechanism in the related art. Therefore, the main purpose of the present invention is to provide an improved transmission of downlink feedback information method to solve at least one of the above problems

Method used

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  • Transmission method of downlink feedback information, base station and relay node
  • Transmission method of downlink feedback information, base station and relay node
  • Transmission method of downlink feedback information, base station and relay node

Examples

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Embodiment 1

[0069] image 3 It is a schematic diagram of single-stream or multi-stream bundling or multi-subframe bundling feedback according to Embodiment 1 of the present invention. Such as image 3As shown, assume that the system includes multiple UL grants or R-UL grants, and assume that the system uses one ACK / NACK-grant, the ACK / NACK bit lengths corresponding to each relay node are the same, and the number of bits in the ACK / NACK-grant adopts The same size as one of the UL grant or R-UL grant, such as 31bits. At this time, the base station notifies the relay node of the same ACK / NACK-RNTI-1 contained in ACK / NACK-grant-1, such as 4-digit hexadecimal "0006", which is equivalent to 16bits binary ACK / NACK-RNTI -1 is "0000000000000110", and use ACK / NACK-RNTI-1 to scramble the cyclic redundancy check bits corresponding to ACK / NACK-grant-1;

[0070] When the uplink service data is single-stream or multi-stream binding or multi-subframe binding (single-stream or multi-stream binding or m...

Embodiment 2

[0073] Figure 4 It is a schematic diagram of dual-stream feedback according to Embodiment 2 of the present invention. Such as Figure 4 As shown, assume that the system includes multiple DL grants or R-DL grants, and assume that the system uses one ACK / NACK-grant, the ACK / NACK bit lengths corresponding to each relay node are the same, and the number of bits in the ACK / NACK-grant adopts The same size as one of the DL grant or R-DL grant, such as 31 bits. At this time, the base station signals the same ACK / NACK-RNTI-1 contained in the relay node contained in ACK / NACK-grant-1, such as 4-digit hexadecimal "FFFD", which is equivalent to 16bits binary ACK / NACK-RNTI -1 is "111111111111101", and use ACK / NACK-RNTI-1 to scramble the cyclic redundancy check bits corresponding to ACK / NACK-grant-1;

[0074] When the uplink service data is dual-stream or multi-stream (dual-stream means that the uplink service data stream is equal to 2, and multi-stream means that the uplink service data...

Embodiment 3

[0077] Figure 5 It is a schematic diagram of hybrid feedback according to Embodiment 3 of the present invention. Such as Figure 5 As shown, it is assumed that the system includes multiple UL grants or R-UL grants, and it is assumed that the system uses one ACK / NACK-grant, the length of ACK / NACK bits corresponding to each relay node is different, and the number of bits in the ACK / NACK-grant adopts The same size as one of the UL grant or R-UL grant, such as 31bits. At this time, the base station notifies the relay node of the same ACK / NACK-RNTI-1 contained in ACK / NACK-grant-1, such as 4-digit hexadecimal "0006", which is equivalent to 16bits binary ACK / NACK-RNTI -1 is "0000000000000110", and use ACK / NACK-RNTI-1 to scramble the cyclic redundancy check bits corresponding to ACK / NACK-grant-1;

[0078] The base station notifies each relay node of different ACK / NACK-bit-offset-j, j=1, 2, ..., n, where n is the maximum number of relay nodes in ACK / NACK-grant-i, such as RN1 corre...

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Abstract

A method for transmitting downlink feedback information, a base station and a relay node are disclosed by the present invention. The method includes the following steps: the base station multiplexes the downlink feedback information corresponding to the relay node in an Acknowledgment signal / Non-acknowledgment signal authorization message, wherein, the downlink feedback information is used to indicate whether the corresponding relay link needs to retransmit the uplink service data or not; and the base station transmits the Acknowledgment signal / Non-acknowledgment signal authorization message to the relay node. According to the technical solution provided by the present invention, the Hybrid Automatic Repeat Request (HARQ) retransmission mechanism is realized without increasing a new physical channel and the signaling overhead is reduced.

Description

technical field [0001] The present invention relates to the communication field, in particular, to a method for transmitting downlink feedback information, a base station and a relay node. Background technique [0002] The LTE system, the LTE-A system, and the advanced International Mobile Telecommunication Advanced (IMT-Advanced) system are all developed on the basis of Orthogonal Frequency Division Multiplexing (OFDM) technology. , in the OFDM system, it is mainly in the form of time-frequency two-dimensional data. In the LTE system and LTE-A system, a resource block (ResourceBlock, referred to as RB) is defined as a continuous time slot (slot) in the time domain In addition, resource blocks mapped on physical resources are called physical resource blocks (Physical Resource Block). Since there are 12 or 24 subcarriers consecutively in the frequency domain, 1 RB consists of N symb ×N sc RB Resource Elements (referred to as RE), where N symb Indicates the number of OFDM...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/18H04W88/08
CPCH04L1/1671H04L1/1812H04L2001/0097
Inventor 毕峰袁明梁枫杨瑾吴栓栓
Owner ZTE CORP