A communication method based on cdma ad hoc network mac quasi-synchronous protocol
A protocol communication, quasi-synchronization technology, applied in synchronization devices, wireless communication, error prevention/detection using return channels, etc., can solve problems such as synchronization difficulties, and achieve the effect of avoiding collisions, improving performance and throughput
Active Publication Date: 2018-12-07
东台城东科技创业园管理有限公司
View PDF5 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, in contemporary mobile communication systems, it is quite difficult to achieve complete synchronization between the data of the system base station and the mobile users. Since the QS-CDMA standard allows a certain relative delay between nodes, it is necessary to propose a Quasi-synchronous MAC protocol
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
[0029] Such as figure 1 As shown, the reachable range of the signal of a certain base station is a network, and there are several nodes (A, B, C, D, E, F) within this range. Among them, there is a synchronization signal transmitter in the base station, and the transmitter sends a synchronization control signal once at a certain time interval. All nodes within the coverage of the base station can receive such a synchronization control signal. Information is sent and received under the control of the synchronization signal. Nodes with far distances within the signal control range of the base office (such as node B and node D) can also send and receive information to each other. All nodes within the range of the base station communicate through the MAC protocol under the control of the synchronous control signal, and the network between the two base stations uses the base station as an intermediary for data transmission and communication. The zero-correlation sequence used in t...
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 present invention discloses an ad-hoc network MAC quasi-synchronization protocol communication method on the basis of a CDMA. The method comprises the following steps: a synchronization signal emitter is configured to emit synchronization control signals at a certain interval, the synchronization control signals are a common zero correlation sequence, signals configured to establish channel connection between nodes are the common zero correlation sequence and a special-purpose zero correlation sequence for transmission data between distribution nodes of each node; an emission node emits RTS data frames to a receiving node at the random slot time in the synchronization control signal interval to reserve a channel, and the receiving node emits CTS data frames to the emission node after receiving the STS data frames; the emission node emits data to the receiving node in the next synchronization control signal period; and the receiving node emits ACK data frames to the emission node after successfully receiving data emitted in one synchronization control signal period. The Ad-hoc network MAC quasi-synchronization protocol communication method on the basis of CDMA is able to realize the similar synchronization effect, the performance of a zero correlation sequence is substantially improved, and the Ad-hoc network MAC quasi-synchronization protocol communication method is anti-interference.
Description
technical field [0001] The invention relates to a MAC protocol method based on a CDMA ad hoc network, in particular to a communication method based on a MAC quasi-synchronous protocol of a CDMA ad hoc network. Background technique [0002] In recent years, with the research of CDMA technology and the development and maturity of related hardware systems, it has been deployed more and more in real life. A wireless ad hoc network is a system including a connection of wireless communication nodes, which has the characteristics of independence, multi-hop, distribution and migration. The medium access control protocol determines the nodes to send and receive messages through the shared space of the wireless channel. The contention-based MAC protocol has low random overhead, is suitable for a single node in a wireless Ad Hoc network environment, and has low implementation costs, so it has become the mainstream network technology in the wireless MAC protocol. The MAC protocol is a...
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): H04W56/00H04W74/08H04L1/18H04B1/7073
CPCH04B1/7073H04B1/7103H04B1/711H04L1/1858H04W56/001H04W74/085
Inventor 黄金城曹瑞周刚
Owner 东台城东科技创业园管理有限公司