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Method for obtaining up time advance in carrier aggregation

A technology of timing advance and carrier aggregation, which is applied in the field of wireless communication, can solve the problems that have not been proposed and cannot support carrier aggregation scenarios 4 and 5, and achieve the effect of ensuring backward compatibility

Inactive Publication Date: 2011-08-17
POTEVIO INFORMATION TECH
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0015] To sum up, in the existing technology, a UE only obtains one TA value, and carrier aggregation scenarios 4 and 5 cannot be supported in the uplink direction. Therefore, if the inter-band carrier aggregation technology is applied in the uplink direction in the future, and it can be applied In scenarios 4 and 5, it is necessary to require a UE to be able to obtain multiple TA values, however, no corresponding solution has been proposed in the prior art

Method used

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  • Method for obtaining up time advance in carrier aggregation
  • Method for obtaining up time advance in carrier aggregation
  • Method for obtaining up time advance in carrier aggregation

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Embodiment Construction

[0046] In order to make the object, technical solution and advantages of the present invention clearer, the solutions of the present invention will be further described in detail below with reference to the accompanying drawings and examples.

[0047] Figure 7 It is a flowchart of a method for obtaining an uplink timing advance in carrier aggregation provided by the present invention. The present invention can be applied in the case of uplink inter-band carrier aggregation, and can especially support carrier aggregation scenarios 4 and 5. Before step 101, multiple uplink CCs are pre-configured for the UE, so that the UE can use the configured multiple uplink CCs Simultaneously perform uplink data transmission. According to the current protocol, the maximum number of uplink CCs configured for the UE is 5.

[0048] In addition, for simplicity of description, unless otherwise specified, the following CCs refer to uplink CCs.

[0049] below, yes Figure 7 The method shown is ...

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Abstract

The invention discloses a method for obtaining up time advance in carrier aggregation. A plurality of up CC are divided into a plurality of groups by eNB; the quantity of up CC in each group is at least one; grouping information and marks of groups of all the up CC are informed to UE; eNB configures different TA values for all the groups; each group of UE respectively obtains TA value corresponding to the group through a random access process; and each up CC group in the group takes the TA value corresponding to the group as a TA value corresponding to each up CC group. The method can ensure that one UE obtains a plurality of TA values.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a method for obtaining uplink timing advance in carrier aggregation. Background technique [0002] In order to meet the requirements of IMT-Advanced, 3GPP has carried out the research on the project of LTE-Advanced, that is, the evolution system of LTE. The key technologies of the LTE-Advanced system include: Multi-antenna Enhanced (Enhanced MIMO) technology, Carrier Aggregation (Carrier Aggregation, CA) technology, Relay (Relaying technology), Coordinated Multi-point transmission (Coordinated Multi-point, CoMP) technology, etc. Among them, the carrier aggregation technology is the most direct method to increase the data transmission rate. Carrier aggregation means that the data of the user equipment (UE) can be transmitted on multiple component carriers (Component Carrier, CC) at the same time, which is equivalent to increasing the transmission bandwidth of the user. . In...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W56/00H04W72/04H04W74/08
CPCH04W56/0045
Inventor 高伟东潘瑜林佩
Owner POTEVIO INFORMATION TECH
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