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A multi-hop communication method, terminal, bs device and system
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A communication terminal and multi-hop communication technology, which is applied in the field of multi-hop communication, can solve problems such as the inability to realize multi-hop networking of mobile stations, and achieve the effect of saving frequency resources
Active Publication Date: 2020-08-07
SHENZHEN ZTE TRUNKING TECH CORP
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Problems solved by technology
[0008] In order to solve the problem that the existing technology cannot realize multi-hop networking of mobile stations, this application proposes a multi-hop communication method, terminal, BS equipment and system
Method used
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Embodiment 1
[0072] In some emergency environments, basic communication facilities may have been destroyed, or basic communication networks, such as wired IP networks, cannot be deployed. In order to meet the communication needs in emergency environments, portable BS devices and mobile terminals are needed, but because there is no wired network, various devices cannot form a large-coverage emergency communication network through wired networks. like Figure 4 As shown, terminals and mobile BSs among network A, network B and network C cannot communicate with each other, forming a large communication network.
[0073] This example attempts to solve Figure 4 Scenarios such as Figure 5 Shown:
[0074] like Figure 5 As shown, through frequency division multiplexing and two time slots, a 4-hop ad hoc network is achieved, where F1 and F2 represent two different frequencies, and _1 and _2 represent two time slots. The terminal goes uplink through F1_1 (time slot 1 of frequency F1) (F1_1 is...
Embodiment 2
[0082] like Image 6 As shown, the terminal calls on F1_1 or F1_2, and BS1 forwards it through F2_1 or F2_2 after receiving it; after receiving F2_1 or F2_2, BS2 forwards it through F3_1 or F3_2. Of course, other combinations of F1, F2, and F3 can also be realized. For example, F3 can be used for the downlink of BS1, and F2 can be used for the downlink of BS2. In addition, the frequency can also be increased to achieve more hops, for example, 4 hops can be achieved through F1, F2, F3, and F4. In addition, the time-frequency combination can also be used repeatedly to achieve more hops.
Embodiment approach
[0083] Compared with the first implementation solution, the advantage is that it can support two simultaneous calls, and the disadvantage is that more frequency resources are required.
[0084] by Image 6 For example, considering the mobility of the BS and the terminal, the terminal may receive one of F2 or F3 or may receive multiple signals in the signal overlapping area, and the BS may receive one of F1 or F3 Or multiple signals may be received in the signal overlapping area, then the terminal needs to scan between F2 and F3; the BS needs to scan between F1 and F2. For PDT\DMR voice communication, select a signal that can be decoded (for example, the voice header can be decoded) for forwarding or receiving. Considering that the BS or the terminal may lose one or two packets of signals in the scanning state, the initiator of the voice or data can send one or two more packets of data. If the BS loses one or two packets of signals, it can resend one or two packets. package d...
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Abstract
The invention provides = a multi-hop communication method, terminals, BS devices and a system. n communication terminals with frequencies F1, F2... Fn and a plurality of BS devices are comprised. Thefrequency of each communication terminal comprises two time slots_1 and _2, and each BS device and the communication terminal form a unit communication network; communication between the communicationterminal in each unit communication network and the BS device is realized; communication between the BS devices between the unit communication networks is achieved through any one of the following two modes: one-time skip communication is achieved only through the frequency of the communication terminal and the time-frequency combination of a certain time slot in two time slots_1 and_2; or one-time skip communication is realized by combining the frequency of the communication terminal and the time frequency of the time slot_1 or the time slot_2. According to the invention, multiple hops are realized through frequency division and time division combination; and which frequency and time slot are adopted by the next hop is determined according to the information of the hop carried by the voice and the data.
Description
technical field [0001] The present application relates to the technical field of communication, and in particular to a multi-hop communication method, terminal, BS device and system. Background technique [0002] In some emergency environments, basic communication facilities may have been destroyed, or basic communication networks, such as wired IP networks, cannot be deployed. In order to meet the communication needs in emergency environments, portable BS devices and mobile terminals are needed, but because there is no wired network, various devices cannot form a large-coverage emergency communication network through wired networks. In PDT\DMR emergency communication, the current mainstream solution is to connect various portable BS devices and mobile terminals through wireless transmission. A single portable BS device can retransmit the terminal signal once to expand the communication range. However, if a larger communication range is required and the coverage of one por...
Claims
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Application Information
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