CN110418415B - Cluster communication system signal transfer method, terminal, transfer equipment and cluster communication system - Google Patents
Cluster communication system signal transfer method, terminal, transfer equipment and cluster communication system Download PDFInfo
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- CN110418415B CN110418415B CN201910676211.XA CN201910676211A CN110418415B CN 110418415 B CN110418415 B CN 110418415B CN 201910676211 A CN201910676211 A CN 201910676211A CN 110418415 B CN110418415 B CN 110418415B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0446—Resources in time domain, e.g. slots or frames
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/53—Allocation or scheduling criteria for wireless resources based on regulatory allocation policies
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/18—Self-organising networks, e.g. ad-hoc networks or sensor networks
Abstract
The invention relates to a signal transfer method, a terminal, transfer equipment and a trunking communication system of the trunking communication system, wherein the signal transfer method of the trunking communication system comprises the following steps: the transfer equipment receives service data sent by the upper-level equipment of the transfer equipment through a first preset time slot of the transfer equipment; the transfer device sends the service data to the next-stage device of the transfer device through a second preset time slot of the transfer device, which is different from the first preset time slot; when the transit equipment transmits service data in a second preset time slot, the time slot number of the synchronous message in the service data is a preset time slot number; the time slot number of the first preset time slot is the same as the preset time slot number. By implementing the invention, when TETRA DMO signal transmission is carried out, the TETRA DMO self-organizing network can be constructed by realizing the non-interfering time slot multiplexing, and the multi-stage link extension is realized to realize the long-distance coverage range.
Description
Technical Field
The present invention relates to trunking communication, and more particularly, to a signal relay method, a terminal, a relay device, and a trunking communication system for a trunking communication system.
Background
TETRA (Terrestrial Trunked Radio, i.e. terrestrial trunked radio) is a digital trunked communication standard mainstream in europe, integrating TMO (Trunked Mode Operation, i.e. trunked mode) \dmo (Direct Mode Operation, i.e. through mode), and can provide command scheduling, data transmission and telephony services on the same technology platform, whose use has been spread throughout all industries worldwide. The method has the advantages that the method is complex in geographical environments such as anti-terrorism, disaster relief, forestry, expressways and the like, and an ad hoc link extension coverage system is required to be built under various dead zones easily caused by common wireless coverage, so that a perfect emergency solution is realized.
The TETRA DMO can realize primary link extension on the same frequency point based on a repeater DM-REP (Direct Mode Repeater, i.e. a through mode repeater). But cannot extend to the second stage DM-REP or more, and when extending to the second stage DM-REP, interference is generated to the previous stage DM-REP. The number of link nodes is limited, i.e. long-range coverage cannot be achieved through multi-level links.
According to fig. 1, the transmission frequency of the conventional TETRA DMO Type1A DM-REP channel is fixed and is at the same frequency point F1 as the DM-MS (Direct Mode Mobile Station, i.e., the through mode terminal). The DM-MS1 signal transmission occupies time slot 1 and time slot 3, DM-REP1 adopts time slot 1 and time slot 3 to receive, and time slot 2 and time slot 4 are used for transmitting signals to DM-MS2, so that one-time signal transfer is realized. And (5) performing one-time link extension coverage by using staggered time slots. As shown in fig. 2, if two stages of DM-REP are adopted for forwarding, a signal is sent to DM-REP2 in DM-REP1 through time slot 2 and time slot 4, the DM-REP2 receives the signal in time slot 1 and time slot 3, and sends the signal in time slot 2 and time slot 4 of itself, and as can be seen from the time slot diagram of fig. 3, time slot 2 and time slot 4 of DM-REP2 are actually DM-MS1 and time slot 3. That is, in fig. 2, DM-REP1 or DM-MS1 is used as a reference (referred to as a reference time slot), and the transmission time slot of DM-REP2 (referred to herein as a reference time slot) is time slot 1 or time slot 3, which coincides with the transmission time slot of DM-MS1, so that the transmission signal of DM-REP2 interferes with the transmission signal of DM-MS1, and it is difficult to form a secondary link.
Disclosure of Invention
The invention aims to solve the technical problem that the link extension number is limited in the prior art, and provides a signal transfer method, a terminal, transfer equipment and a trunking communication system of the trunking communication system.
The technical scheme adopted for solving the technical problems is as follows: a method for constructing signal transfer of a trunking communication system, the method comprising:
the method comprises the steps that a transfer device receives service data sent by a previous-level device of the transfer device through a first preset time slot of the transfer device;
the transit equipment sends the service data to next-stage equipment of the transit equipment through a second preset time slot of the transit equipment, which is different from the first preset time slot;
the transit equipment sends the service data in the second preset time slot, wherein the time slot number of the synchronous message in the service data is a preset time slot number;
the time slot number of the first preset time slot is identical to the preset time slot number.
Preferably, the receiving, by the relay device, service data sent by a previous device of the relay device through a first preset time slot of the relay device includes:
the transit equipment receives service data sent by a third preset time slot of the calling terminal through a first preset time slot of the transit equipment, wherein the time slot number of the first preset time slot is the same as that of the third preset time slot; or (b)
And the transfer equipment receives service data sent by a second preset time slot of the upper-level transfer equipment through the first preset time slot of the transfer equipment.
Preferably, the first preset time slot is a first time slot of the working frequency point of the transfer device, and the second preset time slot is a last time slot of the working frequency point of the transfer device.
Preferably, the sending the service data to the next-stage device of the relay device through the second preset time slot of the relay device, which is different from the first preset time slot, includes:
and the transfer equipment modifies the time slot number of the synchronous information in the service data sent by the second preset time slot into the preset time slot number and then sends the service data to the called terminal and/or the next-stage transfer equipment.
The invention also constructs a terminal comprising: a processor and a memory are provided for the processor,
the memory is used for storing program instructions,
the processor is configured to execute the following steps according to the program instructions stored in the memory:
and sending service data to the transfer equipment through the preset time slot of the terminal, and/or receiving the service data through the preset time slot of the terminal.
Preferably, the preset time slot of the terminal is time slot 1 of the terminal or time slot 2 of the terminal.
The invention also constructs a transfer device comprising: a processor and a memory are provided for the processor,
the memory is used for storing program instructions,
the processor is configured to execute the following steps according to the program instructions stored in the memory:
and receiving service data sent by the previous-stage equipment through a first preset time slot of the transfer equipment, modifying the time slot number of synchronization information in the service data of a second preset time slot, which is different from the first preset time slot, of the transfer equipment into a preset time slot number, and then sending the service data to the next-stage equipment, wherein the preset time slot number is the same as the time slot number of the first preset time slot.
Preferably, the receiving, by the first preset time slot of the transit device, the service data sent by the previous-stage device includes:
and the transfer equipment receives the service data sent by the upper-level equipment through a first time slot of the working frequency point of the transfer equipment, and a second preset time slot of the transfer equipment comprises a last time slot of the working frequency point of the transfer equipment.
The invention also constructs a trunked communication system comprising a calling terminal and a called terminal, and at least one transit device on the communication links of the calling terminal and the called terminal,
the calling terminal is used for sending service data to the transfer equipment through a preset time slot of the calling terminal;
the transfer device is configured to receive the service data through a first preset time slot of the transfer device, and modify a time slot number of synchronization information in the service data of a second preset time slot, which is different from the first preset time slot, of the transfer device to a preset time slot number, and then send the service data, where the preset time slot number is the same as the time slot number of the first preset time slot;
the called terminal is used for receiving the service data through a preset time slot of the called terminal and carrying out final processing.
Preferably, the at least one forwarding device includes a plurality of cascaded forwarding devices, where a first stage of the plurality of cascaded forwarding devices is configured to receive service data sent by the calling device, and send the service data sequentially through each subsequent stage of forwarding devices, and finally send the service data to the called terminal.
The transfer method, the terminal, the transfer equipment and the trunking communication system for implementing the trunking communication system have the following beneficial effects: when TETRA DMO signal transmission can be realized, a TETRA DMO ad hoc network can be constructed by realizing mutually non-interfering time slot multiplexing, and multi-stage link extension is realized to realize long-distance coverage.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
fig. 1 is a schematic diagram of the working principle of a prior art transfer device;
FIG. 2 is a schematic diagram of the operational principle of a prior art cascade of transfer devices;
fig. 3 is a schematic diagram of time slots of a prior art relay device cascade;
fig. 4 is a schematic diagram of the operation of a first embodiment of the relay method of the trunked communication system of the invention;
FIG. 5 is a schematic diagram of a corresponding slot of FIG. 4;
fig. 6 is a schematic diagram of a slot extension rule corresponding to fig. 4;
fig. 7 is a schematic diagram of a time slot of a second embodiment of a relay method of the trunked communication system of the invention.
Detailed Description
For a clearer understanding of technical features, objects and effects of the present invention, a detailed description of embodiments of the present invention will be made with reference to the accompanying drawings.
The invention relates to a transfer method of a cluster communication system, which comprises the following steps: the transfer equipment receives service data sent by the upper-level equipment of the transfer equipment through a first preset time slot of the transfer equipment; the transfer device sends the service data to the next-stage device of the transfer device through a second preset time slot of the transfer device, which is different from the first preset time slot; when the transit equipment transmits service data in a second preset time slot, the time slot number of the synchronous message in the service data is a preset time slot number; the time slot number of the first preset time slot is the same as the preset time slot number. Specifically, the service data sent by the previous-stage device is received through the first preset time slot of the transfer device, then the service data is sent to the next-stage device through the second preset time slot different from the first preset time slot, the next-stage device receives the service data by adopting the first preset time slot same as the previous-stage device, in order to synchronize the receiving and the sending of the service data, when the second preset time slot sends the service data, the time slot number of the synchronous message is changed into the preset time slot number of the first preset time slot, and the transfer process can be cascaded and transferred for many times according to the requirement. The adjacent time slot is received through the current time slot, so that the receiving and transmitting interval is realized, the receiving and transmitting time slots are staggered, the receiving and transmitting extension is realized, the area multiplexing is realized, and the coverage effect is expanded as much as possible. Taking the physical layer structure of 4 time slots of a TETRA single frequency point as an example, arranging and multiplexing the 4 time slot numbers according to a specified sequence, and applying the time slot occupation sequence to the E-PACK wireless service transmission process of the transfer platform equipment; meanwhile, the data transmission channel of the DMO terminal is reduced to be a single time slot, so that a TETRA DMO multi-level extension coverage ad hoc network is constructed by matching with the E-PACK. For example, the DM-MS transmits and receives by using time slot 1, cancels time slot 3 and transmits, cuts off the speaking right exchange and camping function. E-PACK reception uses its slot 1 and then uses any other slot to send traffic data, e.g., it may be delayed to slot 2, slot 3 or slot 4 to send traffic data. The E-PACK is used for receiving and transmitting, a time slot occupation rule is set to avoid time slot collision when a link is extended, interference is avoided, and the link extension is maximized. It can also be understood that the transit device performs synchronization of frame slots according to the synchronization message of the previous device before receiving the service data. For other multi-slot service transmission equipment, the same technical scheme can also be adopted to carry out service transmission so as to realize the coverage of the service transmission as large as possible.
Further, the receiving, by the relay device, the service data sent by the previous-stage device of the relay device through the first preset time slot of the relay device includes: the transit equipment receives service data sent by a third preset time slot of the calling terminal through a first preset time slot of the transit equipment, wherein the time slot number of the first preset time slot is the same as that of the third preset time slot; or the transfer device receives the service data sent by the second preset time slot of the transfer device at the previous stage through the first preset time slot of the transfer device. Specifically, in some embodiments, the device at the upper stage of the transit device may be a calling terminal, where the calling terminal needs to modify the DMO mode data transmission mode based on the prior art, and reserves the time slot 1 for transmission, that is, the third preset time slot, and cancels the time slot 3 for transmission. Through single time slot transceiving, in other embodiments, the previous stage device of the relay device may be another relay device, and the previous stage relay device of the relay device may be the same as or different from the present relay device in operation. Taking TETRA DMO as an example, the E-PACK, that is, the upper-level transfer device, receives the synchronization message of the service data, and forwards the synchronization message on any other time slot of the channel after channel synchronization is completed, the time slot number in the synchronization message is modified to be time slot 1 before forwarding the synchronization message, the next-level E-PACK receives the synchronization message, and the synchronization channel is received in time slot 1 and receives the time slot following transmission for synchronization.
Further, the first preset time slot is a first time slot of the working frequency point of the transfer device, and the second preset time slot is a last time slot of the working frequency point of the transfer device. . Specifically, the transit device may have multiple schemes for receiving and transmitting the time slot, so long as the current time slot is satisfied to receive and transmit the adjacent time slot. When the signal-initiating transmitting device transmits in time slot 1, it may transmit at least one time slot interval apart in order to extend the extension distance while guaranteeing the quality of the information transfer process, i.e. reducing interference between adjacent time slots. For a TETRA DMO system with four time slots, the transfer device receives service data through the first time slot of its working frequency point, namely time slot 1, and transmits service data through the last time slot of its working frequency point, namely time slot 4, and transmits service data through the time slot 4, so that infinite extension of a link can be realized, and interference is avoided. Of course, other time slot combination modes can be adopted to transmit the service data.
Further, sending the service data to the next-stage device of the relay device through a second preset time slot of the relay device, which is different from the first preset time slot, includes: the transfer device modifies the time slot number of the synchronous information in the service data sent by the second preset time slot into the preset time slot number and then sends the service data to the called terminal and/or the next-stage transfer device. Specifically, the transit device may receive the service data through the time slot 1, that is, the first preset time slot, and then send the service data out through the other time slots, that is, the first preset time slots, where the transit device modifies the time slot number in the synchronization information of the transit device to the time slot 1, that is, the preset time slot number, when sending the service data through the other time slots, where it is understood that the other time slots are disguised as pseudo time slots 1 to send the service data. The transfer device can be directly connected with the called device in a communication way to send service data to the called device, or can be connected with the transfer device at the next stage, and the service data is finally sent to the called device after transfer. There is of course no requirement for the number of cascades of transit devices here.
In the embodiment shown in fig. 5, the first stage transit device E-PACK1 receives service data sent by the DM-MS through its time slot 1, and then sends the received service data through its time slot 4, where the first stage transit device E-PACK1 modifies the synchronization information time slot number in its time slot 4 into time slot 1, masquerades its 4 time slots as pseudo time slots 1 to send service data to the next stage transit device, the second stage transit device E-PACK2 is identical with the previous stage device, and also receives the service data through its time slots 1, and sends the service data through its time slots 4 as pseudo time slots 1, and sequentially concatenates, where all time slots based on synchronicity are aligned with the time of the first stage transit device E-PACK1 (i.e. referred to herein as standard time slots based on the time of the calling terminal), and time slots (all time slots are aligned with standard time slots) in fig. 5, so that in the process of transmitting service data by the single frequency point F1, the time slots E-PACK1 can be obtained, and the time slots of each stage transit device E-PACK1 can be seen to be adjacent to each other (i.e. time slots 1S1 and 3S 1 are not interfered with each other, i.e. time slots 1S1 and F2 are respectively generated. It will be further understood that, as shown in fig. 6, the time slot (standard time slot) after the fourth level relay device E-PACK4 starts to enter the next time slot (standard time slot) cycle according to the order described above, and a certain rule of time slot (standard time slot) multiplexing occurs. Therefore, when the service data is transferred through the multi-stage transfer equipment E-PACK, the signal coverage areas of the transfer equipment E-PACK which occupy the same time slot (standard time slot) to send the service data are ensured to be mutually non-crossed, so that signal interference on the same time slot (standard time slot) is avoided.
In another embodiment shown in fig. 7, the first stage relay device E-PACK1 receives, through its slot 1, service data sent by the DM-MS through slot 1 and sends the service data to the next stage relay device E-PACK through its slot 3, where the first stage relay device E-PACK1 modifies its synchronization information slot number in slot 3 to slot 1 and masquerades its slot 3 as a dummy slot 1 to send the service data to the next stage relay device. The second-stage transfer equipment E-PACK2 receives the service data through the time slot 1 and transmits the service data through the time slot 4, wherein the second-stage transfer equipment E-PACK2 modifies the synchronous information time slot number in the time slot 4 into the time slot 1 and disguises the time slot 4 into a pseudo time slot 1 to transmit the service data to the next-stage transfer equipment E-PACK. The third-stage transfer device E-PACK3 receives the service data and performs the same operation as the first-stage transfer device E-PACK1, the fourth-stage transfer device E-PACK4 performs the same operation as the second-stage transfer device E-PACK2, and it can be seen here that the transfer devices E-PACK of each stage sequentially perform transfer of the service data according to the rule of sending the service data described above, and according to the time of the call initiator terminal (referred to as standard time slot), the time slots (standard time slots) of the single-frequency point F1 are respectively F1S1, F1S3, F1S2, F1S4, F1S3, and F1S1, so that interference can be avoided between adjacent transfer devices E-PACK, and when time slots (standard) are multiplexed, different coverage areas occur through the multi-stage transfer of the transfer devices E-PACK, and cross coverage can not occur, so that signal interference can be easily avoided. It will be appreciated here that when extended indefinitely, the time slot (standard) multiplexing may exhibit a certain multiplexing law.
In addition, the terminal of the invention comprises a processor and a memory, wherein the memory is used for storing program instructions, and the processor is used for executing the following steps according to the program instructions stored in the memory: and transmitting the service data to the transfer equipment through the preset time slot of the terminal, and/or receiving the service data through the preset time slot of the terminal, wherein the preset time slot is a single time slot. Specifically, the terminal may include a calling terminal or a called terminal, where the terminal modifies a mode of DMO mode voice data transmission, cancels dual-slot transmission data, and transmits the data through a single slot, i.e., the preset slot of the terminal is slot 1 of the terminal or slot 2 of the terminal. For example, the transmission in the time slot 3 is canceled by the transmission in the time slot 1, and the functions of speaking right exchange and preemption related to the transmission in the occupied time slot 3 are cut off. The calling terminal sends service data through the time slot 1, the transfer equipment transfers the service data, and the called terminal receives the service data through the time slot 1 and receives the service data sent by the transfer equipment. In still other embodiments, data may be transmitted and received over slot 2 of the terminal, as described above.
In addition, the invention also constructs a transfer device, which comprises: the device comprises a processor and a memory, wherein the memory is used for storing program instructions, and the processor is used for executing the following steps according to the program instructions stored in the memory: and receiving service data sent by the previous-stage equipment through a first preset time slot of the transfer equipment, modifying the time slot number of synchronization information in the service data of a second preset time slot, which is different from the first preset time slot, of the transfer equipment into a preset time slot number, and then sending the service data to the next-stage equipment, wherein the preset time slot number is the same as the time slot number of the first preset time slot. Specifically, in an embodiment, the relay device may use a single timeslot for E-PACK, E-PACK transceiving as shown in fig. 4, 5 and 7, and set a timeslot occupation rule to avoid timeslot collision when the link extends, so as to maximize the link extension. Before receiving service data, the transfer device performs time slot synchronization according to the synchronization message of the previous stage device, then receives the service data sent by the previous stage device in time slot 1 of the transfer device, namely, a first preset time slot, that is, the E-PACK receives the synchronization message sent by the previous stage device to perform time slot synchronization, receives the service data sent by the previous stage device in time slot 1 of the E-PACK, that is, the first preset time slot, and sends the service data to the next stage device of the E-PACK through any other time slot of the E-PACK, that is, a second preset time slot, and modifies the time slot number in the synchronization message to be the time slot 1, that is, the preset time slot number before forwarding the synchronization message of the service data, and the next stage device still receives the synchronization message synchronization channel of the service data in time slot 1, that is, the first preset time slot, so as to realize the synchronization of the time slots which are received and follow-up transmission. By setting the transmission time slot of the transfer device, the time slot of the first device (which can be understood as the call initiator terminal device here) can be used as a standard under the condition of cascade connection of the multi-stage transfer device, the standard time slot is positioned here, the time slot (standard) multiplexing on the whole transmission link is realized, and the time slot (standard time slot) multiplexing can be a rule meeting the requirement. For example, the use of time slots (i.e., standard time slots) in adjacent transit devices does not interfere with each other. In other embodiments, the first preset time slot may be another time slot number, and the corresponding second preset time slot is also adjusted accordingly.
Further, receiving, through a first preset time slot of the transit device, service data sent by a previous-stage device includes: and the transfer equipment receives the service data sent by the upper-level equipment through a first time slot of the working frequency point of the transfer equipment, and a second preset time slot of the transfer equipment comprises a last time slot of the working frequency point of the transfer equipment. Specifically, the transit device may have multiple schemes for receiving and transmitting the time slot, so long as the current time slot is satisfied to receive and transmit the adjacent time slot. When the signal-initiating transmitting device transmits in the first slot 1, it may transmit at least one slot interval in order to enlarge the extension distance while guaranteeing the quality of the information transfer process, i.e. reducing the interference between adjacent slots. For a TETRA DMO system of four slots, it is most preferable to select the last slot, slot 4, to transmit traffic data. As shown in fig. 4 and fig. 5, the transmission is performed by using the time slot 4 or the transmission of service data is performed by using the time slot 4, so that when the multi-stage transfer equipment is connected, the data transmission is performed by realizing the occupation rule of a certain regular time slot (standard time slot), and the extension maximization of the link is realized. Of course, other time slot combination modes can be adopted to transmit the service data. Reference may be made in particular to the description hereinabove.
In addition, the invention relates to a trunking communication system, which comprises a calling terminal, a called terminal and at least one transfer device on a communication link of the calling terminal and the called terminal, wherein the calling terminal is used for sending service data to the transfer device through a preset time slot of the calling terminal; the transfer equipment is used for receiving service data through a first preset time slot of the transfer equipment, and transmitting the service data after modifying the time slot number of synchronous information in the service data of a second preset time slot, which is different from the first preset time slot, of the transfer equipment into a preset time slot number, wherein the preset time slot number is the same as the time slot number of the first preset time slot; the called terminal is used for receiving the service data through the preset time slot of the called terminal and carrying out final processing. Specifically, the transit device performs time slot synchronization according to synchronization information of the transmitting terminal or the transit device at the previous stage before receiving the service data, and the whole trunked communication system may adopt a communication system with a physical layer structure of TETRA single frequency point 4 time slots as shown in fig. 4, including a multi-stage transit device E-PACK, and the method described above may be specifically used for transit of the service data, which is not described herein again.
Further, the at least one transfer device comprises a plurality of cascaded transfer devices, a first stage of the plurality of cascaded transfer devices is used for receiving service data sent by the calling device, and the service data is sent by each subsequent stage of transfer devices in sequence, and finally the service data is sent to the called terminal. Specifically, referring to fig. 4, fig. 5 and fig. 6, the time slot 3 or the time slot 4 of each level of transfer equipment E-PACK may send service data, that is, the intermediate equipment may be the same transfer equipment, or may be different intermediate equipment used in cooperation with each other, for example, one transfer equipment uses the time slot 4 to send, and adjacent transfer equipment uses the time slot 3 to send, so as to implement alternation of multiple levels of transfer equipment, that is, implement transmission of service data by combining multiple levels of transfer equipment, so that the time slot (standard time slot) may present a specific rule division multiplexing without occurrence of time slot (standard time slot) interference of an adjacent coverage area, and implement extension of link maximization. When the service data is transmitted through the time slot 3 or the time slot 4, the transit equipment modifies the synchronous information time slot number in the time slot 3 or the time slot 4 into the time slot 1. Reference may be made specifically to the above description, and no further description is given here.
The communication system is not limited to the networking mode, and can also be various chain, star and mixed networking modes, and wireless data transmission does not depend on adjacent point information and does not need full network synchronization. And adopting a strategy of synchronizing the time slots of the receiving and following transmission, and forwarding the time slots in sequence according to rules. And establishing wireless connection between the current link transfer equipment and the adjacent link transfer equipment, and finally completing information transmission of the whole wireless link system.
It is to be understood that the above examples only represent preferred embodiments of the present invention, which are described in more detail and are not to be construed as limiting the scope of the invention; it should be noted that, for a person skilled in the art, the above technical features can be freely combined, and several variations and modifications can be made without departing from the scope of the invention; therefore, all changes and modifications that come within the meaning and range of equivalency of the claims are to be embraced within their scope.
Claims (10)
1. A method for signal relay in a trunking communication system, the method comprising:
the method comprises the steps that a transfer device receives service data sent by a previous-level device of the transfer device through a first preset time slot of the transfer device;
the transit equipment sends the service data to next-stage equipment of the transit equipment through a second preset time slot of the transit equipment, which is different from the first preset time slot;
the transit equipment sends the service data in the second preset time slot, wherein the time slot number of the synchronous message in the service data is a preset time slot number;
wherein, the time slot number of the first preset time slot is the same as the preset time slot number.
2. The signal relay method of trunking communication system according to claim 1, wherein,
the receiving, by the relay device, service data sent by a previous-stage device of the relay device through a first preset time slot of the relay device includes:
the transit equipment receives service data sent by a third preset time slot of the calling terminal through a first preset time slot of the transit equipment, wherein the time slot number of the first preset time slot is the same as that of the third preset time slot; or (b)
And the transfer equipment receives service data sent by a second preset time slot of the upper-level transfer equipment through the first preset time slot of the transfer equipment.
3. The method for signal relay in a trunked communication system of claim 2 wherein,
the first preset time slot is the first time slot of the working frequency point of the transfer equipment, and the second preset time slot is the last time slot of the working frequency point of the transfer equipment.
4. The trunking communication system signal relay method of claim 1, wherein the transmitting the service data to the next-stage device of the relay device through a second preset time slot of the relay device, which is different from the first preset time slot, comprises:
and the transfer equipment modifies the time slot number of the synchronous information in the service data sent by the second preset time slot into the preset time slot number and then sends the service data to the called terminal and/or the next-stage transfer equipment.
5. A terminal, comprising: a processor and a memory are provided for the processor,
the memory is used for storing program instructions,
the processor is configured to execute the following steps according to the program instructions stored in the memory:
the method comprises the steps that service data which are sent to a transfer device through a preset time slot of the terminal and received by the transfer device in a first preset time slot are received through the preset time slot of the terminal, and/or the service data which are sent after the time slot number of synchronization information in the service data of a second preset time slot which is different from the first preset time slot and is received by the transfer device from a previous stage is modified into a preset time slot number through the preset time slot of the terminal, wherein the preset time slot is a single time slot; the time slot number of the first preset time slot is the same as the preset time slot number.
6. The terminal of claim 5, wherein the predetermined time slot of the terminal is time slot 1 of the terminal or time slot 2 of the terminal.
7. A transfer apparatus, comprising: a processor and a memory are provided for the processor,
the memory is used for storing program instructions,
the processor is configured to execute the following steps according to the program instructions stored in the memory:
and receiving service data sent by the previous-stage equipment through a first preset time slot of the transfer equipment, modifying the time slot number of synchronization information in the service data of a second preset time slot, which is different from the first preset time slot, of the transfer equipment into a preset time slot number, and then sending the service data to the next-stage equipment, wherein the preset time slot number is the same as the time slot number of the first preset time slot.
8. The relay device of claim 7, wherein the receiving, by the first preset time slot of the relay device, the service data sent by the previous device comprises:
and the transfer equipment receives the service data sent by the upper-level equipment through a first time slot of the working frequency point of the transfer equipment, and a second preset time slot of the transfer equipment comprises a last time slot of the working frequency point of the transfer equipment.
9. A trunking communication system comprising a calling terminal and a called terminal, and at least one transit device on the communication links of the calling terminal and the called terminal,
the calling terminal is used for sending service data to the transfer equipment through a preset time slot of the calling terminal;
the transfer device is configured to receive the service data through a first preset time slot of the transfer device, and modify a time slot number of synchronization information in the service data of a second preset time slot, which is different from the first preset time slot, of the transfer device to a preset time slot number, and then send the service data, where the preset time slot number is the same as the time slot number of the first preset time slot;
the called terminal is used for receiving the service data through a preset time slot of the called terminal and carrying out final processing.
10. The trunking communication system of claim 9 wherein the at least one forwarding device comprises a plurality of cascaded forwarding devices, wherein a first stage of the plurality of cascaded forwarding devices is configured to receive service data sent by the calling terminal, and sequentially send the service data through each subsequent stage of forwarding devices, and finally send the service data to the called terminal.
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| CN113490204B (en) * | 2021-08-10 | 2023-04-07 | 哈尔滨海能达科技有限公司 | Data transmission method, wireless ad hoc network forwarding device, terminal and storage medium |
| WO2023015434A1 (en) * | 2021-08-10 | 2023-02-16 | 哈尔滨海能达科技有限公司 | Data transmission method, wireless ad hoc network forwarding apparatus, terminal, and storage medium |
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