A broadband trunking wireless transmission method and system
A wireless transmission and broadband trunking technology, which is applied in the broadband trunking wireless transmission system and the field of broadband trunking wireless transmission, can solve the problems of increased difficulty in equipment implementation and unsuitability for trunking systems, and achieve the effect of less difficulty in implementation and simplified processes
Active Publication Date: 2021-11-19
湖南农民伯伯集团有限公司
View PDF3 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0005] The shortcomings of the LTE protocol are: for the public network business operation environment, it is suitable for application scenarios with large bandwidth and a large number of simultaneously activated services, and is not suitable for half-duplex applications such as trunking systems that need to support special business models such as group calls and all calls. Scenes
The dynamic resource scheduling method it adopts; different multiple access methods for uplink and downlink (OFDM for downlink and DFT-S-OFDM for uplink); wireless frame length of 5ms or 10ms, shorter interval between uplink and downlink switching points, the above three points will make the implementation of related equipment more difficult
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0064] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.
[0065] In order to solve the deficiencies in the prior art, the present invention provides an advanced wireless frame structure, and realizes broadband trunking wireless transmission based on the wireless frame.
[0066] Such as figure 1 As shown, the time slot length of the radio frame is divided in units of OFDM symbols.
[0067] The length of the wireless frame is 20ms, a total of 64000 sampling points, including 6 time slots: data time slot slot0, data time slot slot1, data time slot slot2, data time slot slot0, downlink synchronization time slot (dl sync slot), and GP guard slot.
[0068] The length of one OFDM symbol (symbol) is 256+64=320 sampling points, and the duration is 100us. In order to support wide-coverage cell configuration and resist intersymbol interference (ISI) caused by multipath effects, the CP length of the cyclic pr...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention relates to a broadband cluster wireless transmission method, which adopts a TDD duplex mode, an OFDM multiple access mode, and a semi-static resource scheduling method, so that the system can carry various types of services such as voice calls and video surveillance. The broadband trunking wireless transmission system described in the present invention utilizes the semi-static resource allocation broadband trunking wireless transmission method, adopts TDD duplex mode and OFDM multiple access mode, so that the trunking system can carry both traditional voice services and video High-speed data services. Compared with the prior art, the present invention has the advantages of wide band, simplified process, less difficulty in realization and more suitable for trunking system business.
Description
technical field [0001] The present invention relates to communication technology based on voice and low-speed data transmission, more specifically, to a broadband cluster wireless transmission method and a broadband cluster wireless transmission system. Background technique [0002] Traditional narrowband trunking is a communication system based on voice and low-speed data transmission, which occupies most of the current trunking system market and plays an important role in command and dispatch. With the rapid development of wireless high-speed data service requirements, broadband has become an inevitable trend in the development of wireless communication networks. In the process of using the trunking communication system for command and dispatch, industrial users not only need to "hear" and "call", but also "see" and "see clearly". They need to support the return of video images, but Due to the bandwidth limitation of the traditional narrowband trunking system, it is natur...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): H04W72/12H04W74/08H04W76/10H04L5/00H04L5/14
CPCH04L5/0007H04L5/003H04L5/1469H04W72/12H04W74/0833H04W74/0858H04W76/10
Inventor 戴国良
Owner 湖南农民伯伯集团有限公司