Downlink channel control signaling sending and receiving method and apparatus thereof

Abstract

The invention discloses a method for sending and receiving a down channel control signal and a device thereof. At a sending terminal: control information of each receiving terminal is coded and modulated to generate CCE, and control information in the CCE does not include chosen control information; CCEs of the receiving terminal having same chosen control information are regarded as one group, the CCEs in each group are performed the serial number, and indication information used for indicating the CCE number and choosing the corresponding relation of the control information is generated; after the indication information is code and modulated, which is mapped on a subcarrier together with the CCEs of the receiving terminal, and is sent out from a control channel after the post-treatment is completed. At a receiving terminal: the CCEs are detected on the control channel and the indication information is received; when the CCE sending to a user is detected, and the chosen control information of the user can be obtained according to the analyzed number of the CCE and the corresponding relation of the CCE number and the chosen control information. The invention reduces the cost of the control signal.

Description

technical field [0001] The invention relates to the transmission technology of control signaling in a multi-user wireless communication system, in particular to a method and device for sending and receiving downlink channel control signaling. Background technique [0002] At present, the physical layer transmission technology commonly used in Long Term Evolution (LTE, Long Term Evolution) system and IMT-Advanced system is Orthogonal Frequency Division Multiplexing (OFDM, Orthogonal Frequency Division Multiplexing) technology. Utilization rate and low processing complexity make it a promising one among various downlink solutions. OFDM technology is essentially a multi-carrier modulation communication technology. Its basic principle is to decompose a high-rate data stream into several low-rate data streams and transmit them simultaneously on a group of mutually orthogonal sub-carriers. [0003] According to existing LTE, radio resources in an LTE system refer to time and freq...

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Problems solved by technology

[0014] At present, the research on the content and allocation method of control signaling is a hot spot, but there are few studies on effectively reducing the overhead of control signaling. At present, there are schemes to use tree structure to reduce resource allocation information in control signaling, but this This solution only uses the tree structure to reduce the resource allocation information in the control signaling, but cannot reduce other control information, nor can it take into account other performances, such as the number of blind detection times, which is unfavorable for the UE

[0015] In LTE and IMT-Advanced systems, the modulation methods of service data include QPSK, 16QAM, 64QAM, etc. It can be found that many UEs have the same modulation methods at the same time. If the control signaling of each UE This information is sent everywhere, and the overhead of control signaling will be very large

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