A kind of narrowband wireless communication system and its time division multiplexing method of pdcch and pdsch
A wireless communication system and narrowband technology, applied in the transmission system, digital transmission system, multiplexing communication, etc., can solve the problem of decreased data scheduling efficiency, reduced resource utilization and data transmission efficiency, and inability to guarantee the service quality of user equipment, etc. problem, achieve the effect of reducing implementation complexity and improving resource utilization
Inactive Publication Date: 2019-12-20
POTEVIO INFORMATION TECH CO LTD
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[0007] 1. If the downlink uses the frequency division method for data transmission, that is, scheduling multiple frequency points in the same subframe to transmit PDCCH information, it will increase the difficulty of the system algorithm and implementation complexity, and reduce the resource utilization and data transmission efficiency. The quality of service (QoS) of the user equipment cannot be guaranteed;
[0008] 2. If the downlink adopts time-division method for data transmission, the downlink control information needs to be transmitted in multiple subframes, resulting in a decrease in data scheduling efficiency
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[0035] In order to make the technical principles, features and technical effects of the technical solution of the present application clearer, the technical solution of the present application will be described in detail below in conjunction with specific embodiments.
[0036] The present invention proposes a method for time-division multiplexing of the downlink control channel PDCCH and the downlink shared channel PDSCH. The basic design idea is that PDCCH and PDSCH are sent by frequency division and time division, as figure 2 As shown, the specific frequency point and time slot indicated by the control information are used to transmit PDCCH, and other frequency points in this time slot do not transmit PDSCH; when the control information indicates that there is no PDCCH transmission on the frequency point, all service frequency points in the same time slot are Transmit PDSCH.
[0037] Please refer to image 3 and Figure 4 , the multi-frequency point resource allocation sc...
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The invention discloses a time division multiplexing method of a physical downlink control channel (PDCCH) and a physical downlink shared channel (PDSCH) of a narrowband wireless communication system. The method comprises the following steps of on a control information indication frequency point, using a physical control format indication channel (PCFICH) to indicate whether PDCCH information or PDSCH information is transmitted on a time-frequency domain resource of current subframe multiplexing; if the PCFICH on the control information indication frequency point indicates that the multiplexing time-frequency domain resource of a current subframe transmits the PDCCH information, carrying out PDCCH transmission on the control information indication frequency point; and if the PCFICH on the control information indication frequency point indicates that the multiplexing time-frequency domain resource of the current subframe transmits the PDSCH information, carrying out PDSCH transmission on all the logic frequency points occupied by user equipment. The invention also discloses the narrowband wireless communication system.
Description
technical field [0001] The present application relates to the technical field of wireless communication, in particular to a narrowband wireless communication system and a method for time division multiplexing of PDCCH and PDSCH. Background technique [0002] At present, the 230MHz frequency band is mainly used in data transmission stations to undertake remote data collection work. Because the provided rate is very low, it can only be used for some simple communication applications, and cannot meet the growing business needs of smart grids and sensor networks. According to the future planning of the State Grid, it is required to find a new broadband communication technology to meet the business needs of its distribution network automation, load management, power consumption information collection, smart grid user equipment services, emergency repairs, and video surveillance in special areas . [0003] The 230MHz frequency band product based on TD-LTE technology provides a be...
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IPC IPC(8): H04L5/00H04J3/02
CPCH04J3/02H04L5/0091
Inventor 王丽雷旭
Owner POTEVIO INFORMATION TECH CO LTD