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Method and equipment for configuring space diversity of ePDCCH

A space diversity and equipment technology, applied in the directions of error prevention/detection, signaling distribution, distributed distribution, etc. through diversity reception, can solve the problems of link performance balance, no solution yet, no solution proposed, etc. The effect of improving link performance, improving space diversity performance, and reducing the complexity of demodulation

Inactive Publication Date: 2014-03-26
BEIJING SAMSUNG TELECOM R&D CENT +1
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Problems solved by technology

[0007] However, how to configure the space diversity of ePDCCH can reduce the complexity of UE demodulating the REs occupied by the alternative ePDCCH, and make full use of space diversity to improve the link performance of ePDCCH, and no corresponding solution has been proposed.
[0008] In addition, how to construct localized eCCEs and distributed eCCEs to balance the link performance of each eCCE has not yet proposed a corresponding solution

Method used

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  • Method and equipment for configuring space diversity of ePDCCH
  • Method and equipment for configuring space diversity of ePDCCH
  • Method and equipment for configuring space diversity of ePDCCH

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Embodiment Construction

[0046] In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0047] As mentioned above, for the distributed ePDCCH, the method of space diversity is adopted to enhance the link performance. For an ePDCCH, each RE in a PRB pair is alternately used at the granularity of one RE N AP One of the APs, for example N AP equal to 2.

[0048] In order to reduce the complexity of the UE demodulating the REs occupied by the candidate ePDCCH, this application proposes a technical solution for configuring ePDCCH space diversity. Each RE in the pair uses N alternately at the granularity of one RE AP On the premise of one of the APs, each RE in the PRB pair is mapped to a fixed AP. That is to say, the RE of each eREG takes one RE as the granularity, alternately using N AP AP, and each RE in the PRB pair is mapped...

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Abstract

The invention discloses a method for configuring space diversity of an ePDCCH. The method comprises the following steps: REs of each eREG take one RE as the particle size to alternatively use one of NAP antenna ports; REs in each PRB pair are respectively mapped in one fixed AP. The invention also discloses a method of constructing local eCCEs, and a method of constructing distributed eCCEs. The invention further discloses equipments corresponding to the three methods. According to the invention, the space diversity performance of the distributed ePDCCHs can be improved, and the number of REs of the local eCCEs and the distributed eCCEs can be averaged, thereby ensuring the consistence or approaching of link path performance.

Description

technical field [0001] The present application relates to a wireless communication system, and more specifically relates to a method and device for configuring ePDCCH space diversity, a method and device for constructing localized eCCE, and a method and device for constructing distributed eCCE. Background technique [0002] In the 3GPP LTE system, the length of each radio frame is 10ms, which is equally divided into 10 subframes. A downlink transmission time interval (TTI) is defined on a subframe. Such as figure 1 As shown, each downlink subframe includes two slots. For the general cyclic prefix (CP) length, each slot contains 7 OFDM symbols; for the extended CP length, each slot contains 6 OFDM symbols. In each subframe, the first n OFDM symbols, n equal to 1, 2 or 3, are used to transmit downlink control information, including physical downlink control channel (PDCCH) and other control information; the remaining OFDM symbols are used to transmit physical downlink shared...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/06H04L5/00
CPCH04W24/00H04W72/00H04B7/0691H04L5/0035H04L5/0023H04L5/0053H04W72/23
Inventor 孙程君李迎阳
Owner BEIJING SAMSUNG TELECOM R&D CENT
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