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Method for receiving random access response information in carrier aggregation

A technology of random access response and carrier aggregation, applied in wireless communication, electrical components, etc., can solve problems such as no solution

Active Publication Date: 2012-07-18
POTEVIO INFORMATION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0015] However, if the method of scrambling PDCCH with C-RNTI is used to indicate the resource location of RAR information, then there is no corresponding solution for how to receive RAR information.

Method used

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  • Method for receiving random access response information in carrier aggregation
  • Method for receiving random access response information in carrier aggregation
  • Method for receiving random access response information in carrier aggregation

Examples

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Embodiment Construction

[0028] In the present invention, the UE receives the RAR information according to the random access response window and the maximum number of retransmissions of the random access preamble, wherein, within the random access response window, the reception of the RAR information may support the HARQ function or may not support the HARQ function. Features. Alternatively, in the present invention, there is no need to set the random access response window and the maximum number of retransmissions of the random access preamble, but the reception of RAR information is realized through the HARQ function.

[0029] The present invention is described in detail below in conjunction with accompanying drawing, specifically please refer to Figure 2 ~ Figure 4 .

[0030] figure 2 It is a random access flowchart for receiving RAR information in carrier aggregation provided by the present invention. As an example, Cell1 is the PCell of the UE, and others are SCells of the UE, such as Cell2 i...

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Abstract

The embodiment of the invention discloses a method for receiving random access response information in carrier aggregation. The method comprises the steps that a piece of user equipment (UE) obtains configuration information of a random access response window, enters a random access procedure, continuously monitors physical downlink control channel (PDCCH) scrambled by cell-radio network temporary identifier (C-RNTI) in the random access response window, and receives the random access response (RAR) information from a resource indicated by the PDCCH scrambled by the C-RNTI in the random access response window; when the RAR information is not received successfully in the random access response window, the UE judges whether the transmission times of a random access lead code reaches a maximum transmission times or not, if yes, the UE ends the current random access procedure, otherwise, the UE retransmits the random access lead code to a network side and returns to the steps of continuously monitoring the PDCCH scrambled by the C-RNTI; and the UE receives the RAR information based on a Hybrid Automatic Requestor (HARQ) mechanism. The method disclosed by the invention can determine how to receive the RAR information.

Description

technical field [0001] The present invention relates to the technical field of carrier aggregation, in particular to a method for receiving random access response information in carrier aggregation. Background technique [0002] In the Rel-10 protocol, RAN4 defines intra-band carrier aggregation and inter-band carrier aggregation of up to 2 frequency bands. In the current Rel-11 research, several projects have been established considering extending multiple frequency bands for carrier aggregation. As the number of frequency bands capable of carrier aggregation increases, in Rel-11 and subsequent releases, there will be more and more UEs supporting inter-band carrier aggregation, so the need for multiple TAs will also increase. [0003] A UE supporting multiple TAs needs to obtain multiple timing advances (TAs), and to obtain multiple TAs, the UE must first ensure that the UE can obtain absolute TA information. [0004] Currently, the UE obtains absolute TA information thro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W74/08
Inventor 高兴航潘瑜池连刚张欢高伟东林佩
Owner POTEVIO INFORMATION TECH CO LTD
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