Method and device for unlink transmission in multicarrier aggregation system

A technology of multi-carrier aggregation and transmission method, applied in the field of uplink transmission method and equipment

Active Publication Date: 2011-07-06
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0026] The embodiment of the present invention provides an uplink transmission method and equipment in a multi-carrier aggregation system, which is used to solve the

Method used

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  • Method and device for unlink transmission in multicarrier aggregation system
  • Method and device for unlink transmission in multicarrier aggregation system
  • Method and device for unlink transmission in multicarrier aggregation system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0077] Embodiment 1: The newly added SCell and the cells in the TA group that have established uplink synchronization use the same timing reference downlink carrier;

[0078] Step 1: The terminal establishes an RRC connection on the PCell;

[0079] The terminal establishes an RRC connection with the base station through a random access procedure on Cell_1, and Cell_1 can be used as a PCell. In the random access process, the timing reference downlink carrier used by Msg1 is the downlink carrier of Cell_1;

[0080] Step 2: The base station adds an SCell;

[0081] Due to the increase in the amount of terminal data, the base station needs to configure additional cells for the terminal, and the SCell can be added using the RRC reconfiguration process. Assume that the added cell number is Cell_4.

[0082] Step 3: Add Scell's uplink timing advance acquisition;

[0083] Since Cell_4 and Cell_1 belong to the same TA group, it can be determined that Cell_4 can use the same uplink ti...

Embodiment 2

[0086] Embodiment 2: using the downlink carrier of the PCell as the timing reference downlink carrier;

[0087] Step 1: The terminal establishes an RRC connection on the PCell;

[0088] The terminal establishes an RRC connection with the base station through a random access procedure on Cell_1, and Cell_1 can be used as a PCell. In the random access process, the timing reference downlink carrier used by Msg1 is the downlink carrier of Cell_1;

[0089] Step 2: The base station adds an SCell;

[0090] Due to the increase in the amount of terminal data, the base station needs to configure additional cells for the terminal, and the SCell can be added using the RRC reconfiguration process. Assume that the added cell number is Cell_2.

[0091] Step 3: Add Scell's uplink timing advance acquisition;

[0092]Since the uplink timing advances of Cell_2 and Cell_1 are different, it is necessary to acquire the timing advances of Cell_2. One method of obtaining the uplink timing advanc...

Embodiment 3

[0097] Embodiment 3: use the downlink carrier corresponding to the newly added SCell as the timing reference downlink carrier;

[0098] Step 1: RRC connection establishment on PCell;

[0099] The base station establishes an RRC connection with the base station through a random access procedure on Cell_1, and Cell_1 is set as a PCell. In the random access process, the timing reference downlink carrier used by Msg1 is the downlink carrier of Cell_1;

[0100] Step 2: The base station adds an SCell;

[0101] Due to the increase in the amount of terminal data, the base station needs to configure additional cells for the terminal, and the SCell can be added using the RRC reconfiguration process. Assume that the added cell number is Cell_2.

[0102] Step 3: Add Scell's uplink timing advance acquisition;

[0103] Since the uplink timing advances of Cell_2 and Cell_1 are different, it is necessary to acquire the timing advances of Cell_2. One method of obtaining the uplink timing ...

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Abstract

The embodiment of the invention discloses a method and a device for unlink transmission in a multicarrier aggregation system, belongs to the technical field of wireless communication and solves the problem of how to perform unlink transmission in a subcell when the subcell is additionally arranged and configured for a terminal at a base station. After the subcell is additionally arranged and configured for the terminal at the base station, one carrier is selected from downlink carriers corresponding to the cells in downlink synchronization with the base station as the timing reference downlink carrier used for the subcell according to the predetermined reference carrier selecting rule; and the terminal performs uplink transmission in the subcell according to the downlink timing of the timing reference downlink carrier. Through the adoption of the method and the device, the timing reference downlink carrier used during the uplink transmission in the additionally arranged and configuredsubcell can be determined, and the unlink transmission is further carried out according to the timing reference downlink carrier.

Description

technical field [0001] The present invention relates to the field of wireless communication, in particular to an uplink transmission method and equipment in a multi-carrier aggregation system. Background technique [0002] The peak rate of the Long Term Evolution (LTE Advanced, LTE-A) system is much higher than that of the Long Term Evolution (LTE) system, and is required to reach 1 Gbps downlink and 500 Mbps uplink. At the same time, the LTE-A system requires good compatibility with the LTE system. The LTE-A system introduces a carrier aggregation (Carrier Aggregation, CA) technology based on the need to increase the peak rate, be compatible with the LTE system, and make full use of spectrum resources. [0003] The carrier aggregation technology refers to a mechanism in which a terminal (UE) can aggregate multiple cells (cells) at the same time, and multiple cells can simultaneously provide data transmission services for the UE. In the carrier aggregation system, the carr...

Claims

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Application Information

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IPC IPC(8): H04W28/16
CPCH04W56/0045H04L5/0053H04W56/00H04W28/16H04W72/0453H04L5/001H04L27/2656
Inventor 赵亚利许芳丽谌丽刘佳敏
Owner DATANG MOBILE COMM EQUIP CO LTD
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