Method and device for down shared channel communication
A technology for sharing channels and detection methods, which is applied in sustainable communication technology, transmission systems, energy consumption reduction, etc., and can solve the problems of blind detection, decoding and searching, excessive occupation of terminal processor resources, and excessive consumption of terminal battery energy. and other issues to achieve the effect of saving processing power and battery energy and reducing the number of trials
Active Publication Date: 2013-10-30
SPREADTRUM COMM (SHANGHAI) CO LTD
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Problems solved by technology
Blind detection and decoding is done by the processor in the terminal. Because of the large number of searches, it may occupy too much processor resources of the terminal and consume too much precious battery energy of the terminal.
[0009] In addition to the PDCCH in the LTE system, the downlink shared channel of other OFDM-based communication systems may also have a similar problem of too many blind detection and decoding searches
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[0050] In the following description, many technical details are proposed in order to enable readers to better understand the application. However, those skilled in the art can understand that without these technical details and various changes and modifications based on the following implementation modes, the technical solution claimed in each claim of the present application can be realized.
[0051] In order to make the purpose, technical solution and advantages of the present invention clearer, the following will further describe the implementation of the present invention in detail in conjunction with the accompanying drawings.
[0052] The flow of the downlink shared channel receiving method in the embodiment of the present invention is as follows figure 1 shown.
[0053] In step 101, the terminal judges whether the specified start time has arrived, and if not, waits until the start time arrives. A typical representative of the downlink shared channel here is the PDCCH in...
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The invention relates to the field of wireless communication and discloses a method and a device for down shared channel communication. In the invention, an invalid unit is defined as below: data signals are sent according to a previously set sequence, reference signals are sent as usual, and a terminal side can judge whether the received unit is the invalid unit or not by comparing the coherent accumulating result of the data signals with the relative relation of noise width. The judging method of the invalid unit can be easily realized, and compared with an incoherent accumulating method, the judging method of the invalid unit has the advantages of enhancive detection and strong anti-noise ability because a coherent accumulating technique is used. The invalid unit is firstly detected, the searching space of a blind detection coding is optimized according to the detecting situation of the invalid unit, and the blind detection coding is then carried out, thus, the probing times of the blind detection coding of a down physical channel can be effectively reduced, and the processing ability of a terminal and the energy of a battery are saved.
Description
technical field [0001] The invention relates to the field of wireless communication, in particular to the communication technology of downlink shared channel. Background technique [0002] With the widespread popularization of mobile networks such as Global System for Mobile communication (GSM for short) and Code Division Multiple Access (CDMA for short) in the past two decades, global voice communication The business was a huge success. Currently, there are more than 1.8 billion mobile voice users worldwide. Users demand for data services such as multimedia messaging, online games, video on demand, music downloads and mobile TV is also increasing rapidly. In order to realize these requirements, the wireless mobile communication system needs to be developed in the direction of broadband and portability, which requires high data bandwidth, low complexity, low battery power consumption, and high spectral efficiency for communication terminals. [0003] In order to realize t...
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IPC IPC(8): H04L5/00H04L1/00H04L25/02
CPCY02D30/70
Inventor 吴涛陈垚
Owner SPREADTRUM COMM (SHANGHAI) CO LTD