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Methods for transmitting and receiving control information and equipment

A technology for controlling information and sending methods, which is applied in the field of mobile communication and can solve the problem of fewer PDCCH control symbols

Active Publication Date: 2011-05-25
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0025] The present invention provides a method and device for sending and receiving control information to solve the problem in the prior art that when the MBSFN subframe is used as unicast, there are too few available PDCCH control symbols

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  • Methods for transmitting and receiving control information and equipment
  • Methods for transmitting and receiving control information and equipment
  • Methods for transmitting and receiving control information and equipment

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Embodiment Construction

[0057] There are unicast subframes and MBSFN subframes in the LTE system. At present, it has been stipulated in the R0 version of LTE that the MBSFN subframe can already be used as unicast. However, due to the particularity of the MBSFN subframe, there are at most 2 control symbols before the MBSFN subframe. If the MBSFN subframe is used as unicast, more PDCCHs are needed to schedule the subsequent PDSCH. However, since the PDCCH of the current MBSFN subframe is 1 or 2 symbols, it will be paired to unicast due to the limitation of PDCCH. Scheduling has an impact, that is, due to the lack of PDCCH, the resources of the data part cannot be fully utilized. Based on this, an embodiment of the present invention will provide a method for transmitting and receiving control information related to an LTE subframe structure. By adopting this scheme, the resources of the PDCCH of the subframe can be extended without affecting backward compatibility. Specific embodiments of the present ...

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Abstract

The invention discloses methods for transmitting and receiving control information and equipment. The method for transmitting control information comprises the following steps: a base station configures a multicast broadcast single frequency network (MBSFN) subframe as unicast; the base station uses the parts next to the original control symbols of the MBSFN subframe as expanded control symbols; and the base station transmits the expanded control symbols to physical downlink control channel (PDCCH) control information for dispatching a physical downlink shared channel (PDSCH). The invention has the following beneficial effect: the defect that the resources of the data part can not be fully utilized due to lack of the PDCCH is overcome. Meanwhile, by adopting the scheme, the resources of the PDCCH of the subframe can be expanded and backward compatibility can not be affected.

Description

technical field [0001] The invention relates to mobile communication technology, in particular to a method and device for sending and receiving control information. Background technique [0002] 1. Introduction to the frame structure of the LTE (Long Term Evolution, long-term evolution) system. [0003] figure 1 It is a schematic diagram of the frame structure of the LTE-TDD (Long Term Evolution-Time Division Duplex, Long Term Evolution-Time Division Duplex) system, such as figure 1 As shown, there are 10 subframes, and the uplink and downlink configuration methods of the 10 subframes can be flexibly changed. In LTE-TDD, seven uplink and downlink configuration methods are defined, as shown in Table 1. figure 1 The special subframes in are: DwPTS (Downlink Pilot Time Slot, downlink pilot time slot), GP (Guard Period, protection time slot), UpPTS (Uplink Pilot Time slot, uplink pilot time slot). [0004] Table 1: [0005] [0006] Wherein, D represents downlink, U repre...

Claims

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Application Information

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IPC IPC(8): H04B7/26H04L27/26
Inventor 杨晓东丁昱赵锐
Owner DATANG MOBILE COMM EQUIP CO LTD
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