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Method and device for enhancing uplink coverage, and base station

A technology for enhancing the uplink and base station, which is applied in the direction of error prevention/detection, digital transmission system, and error prevention using the return channel. Effect

Active Publication Date: 2013-09-18
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, TTI bundling somewhat limits the flexibility of the scheduler to perform resource allocation, especially when the bundling length is too large
So far, there is no good solution for enhancing UL coverage while taking into account the flexibility of resource allocation

Method used

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  • Method and device for enhancing uplink coverage, and base station
  • Method and device for enhancing uplink coverage, and base station
  • Method and device for enhancing uplink coverage, and base station

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050]In this example, it is assumed that the enhanced Node B serves the UE, and the uplink service has been activated.

[0051] figure 2 It is a schematic diagram of implementing the first transmission of an uplink UL transport block through HARQ process bundling according to an embodiment of the present invention, as shown in figure 2 As shown, within the range of transmission time interval TTI 1, the enhanced Node B carries the UL information about HARQ process 1 carried by the Physical Downlink Control Channel (PDCCH, Physical Downlink Control CHannel) included in the downlink (DL, Down Link) bandwidth. The grant information allocates HARQ process 1 (corresponding to the transmission time interval TTI 5) resource for the UE to transmit the uplink transmission block; similarly, within the range of the transmission time interval TTI 6, the enhanced Node B uses the UL grant information about the HARQ process 2 as The UE allocates HARQ process 2 (corresponding to transmissi...

Embodiment 2

[0055] In this example, it is assumed that the enhanced Node B serves the UE, and the uplink service has been activated.

[0056] The enhanced Node B notifies the UE of the following information through the radio frequency resource control signaling carried in the UE-specific system message: TTI bundling enable flag, bundling length, and RV sent by consecutive bundling subframes related to TTI bundling. Specifically, in this example, it is assumed that the TTI bundling enable flag is set to "1", indicating that the TTI bundling function is enabled, the bundling length is 4, and the redundancy version sent by the continuous bundling subframes related to TTI bundling is: { RV0, RV1, RV2, RV3}.

[0057] The UE receives and decodes the radio frequency resource control signaling in the system message, acquires and saves the following information: TTI bundling enable flag, bundling length, and RV information sent by consecutive bundling subframes related to TTI bundling.

[0058] ...

Embodiment 3

[0064] In this example, it is assumed that the enhanced Node B serves the UE, and the uplink service has been activated. Assume that according to the method described in the first embodiment, the UL transmission block is completed at the first transmission attempt in the two HARQ processes.

[0065] Figure 4 It is a schematic diagram of realizing retransmission of uplink UL transmission blocks through HARQ process bundling according to an embodiment of the present invention, as shown in Figure 4 As shown, within the transmission time interval span from the beginning of transmission time interval TTI 1 to the end of transmission time interval TTI 4, the enhanced Node B receives the first transmission attempt RV of HARQ process 1, and according to the first transmission attempt RV of HARQ process 1 Decoding the UL transport block; within the transmission time interval TTI5, the enhanced Node B sends an acknowledgment / negative (ACK / NACK) acknowledgment related to the first tra...

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Abstract

The invention discloses a method and a device for enhancing uplink coverage, and a base station. The method comprises the step that a network side controls UE (user equipment) to use more than two HARQ (hybrid automatic repeat request) processes to transmit the same UL (uplink) transmission block. According to the method disclosed by the invention, the base station controls the UE to use more than two HARQ processes to transmit the same UL transmission block and controls the enhancement of the uplink coverage by controlling the cluster length of the TTI (transmission time interval) and the maximum trial transmission times of the HARQ processes, so that not only can the coverage performance of the UL be improved, but also the flexibility of the resource allocation can be realized.

Description

technical field [0001] The present invention relates to an enhanced uplink coverage technology, in particular to a method and device for enhancing uplink coverage, and a base station. Background technique [0002] The radio access network of the Long Term Evolution (LTE, Long Term Evolution) system includes: an enhanced Node B (eNB) and a User Equipment (UE, User Equipment), wherein the enhanced Node B is connected to a core network or other networks, and is The wireless interface implements mutual communication with UEs located in the cell served by the Node B. However, at the cell edge, UEs are sometimes power-limited, that is, their transmit power is not enough to achieve a target transmit error rate, that is, the so-called Block Error Ratio (BLER, Block Error Ratio) cannot reach the target value. Therefore, there is a need to find a solution for enhancing coverage of power-limited UEs, ie, a solution to enhance uplink (UL, Uplink) coverage. Currently, Transmission Time...

Claims

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Application Information

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IPC IPC(8): H04W16/26H04L1/00H04L1/16H04L1/18
CPCH04L1/1822H04W72/04
Inventor 陈宪明关艳峰袁弋非左志松张峻峰
Owner ZTE CORP
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