CN109698717B - Networking method for common-frequency and simulcasting of relay station and relay station - Google Patents
Networking method for common-frequency and simulcasting of relay station and relay station Download PDFInfo
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- CN109698717B CN109698717B CN201811603865.1A CN201811603865A CN109698717B CN 109698717 B CN109698717 B CN 109698717B CN 201811603865 A CN201811603865 A CN 201811603865A CN 109698717 B CN109698717 B CN 109698717B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/50—Circuits using different frequencies for the two directions of communication
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/155—Ground-based stations
- H04B7/15507—Relay station based processing for cell extension or control of coverage area
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/155—Ground-based stations
- H04B7/15528—Control of operation parameters of a relay station to exploit the physical medium
- H04B7/15542—Selecting at relay station its transmit and receive resources
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- Mobile Radio Communication Systems (AREA)
- Radio Relay Systems (AREA)
Abstract
The invention relates to the technical field of communication, and provides a networking method, a relay station and a system for common-frequency and simulcast of the relay station, wherein the method comprises the following steps: the first relay station sets a first time slot as a working time slot and sets a second time slot as an interconnection time slot with at least one other relay station; a group of double frequency points is set, and the double frequency points comprise an uplink frequency (F1) and a downlink frequency (F2); the first relay station receives data sent by the mobile terminal in an uplink frequency working time slot (F1-1) and forwards the data to other relay stations in an uplink frequency interconnection time slot (F1-2); all the relay stations transmit data to the mobile terminals under their coverage in a unified downlink frequency working time slot (F2-1). According to the technical scheme, the common-frequency simulcasting interconnection among the relay stations can be realized without increasing hardware equipment or occupying independent frequency resources, the networking is simple and reliable, and the actual communication technical requirements can be met.
Description
Technical Field
The invention relates to the technical field of mobile communication, in particular to a network method, a relay station and a system for the same-frequency and same-broadcast of the relay station.
Background
In a mobile communication system, a relay station is used to increase a communication area and extend a coverage. Usually, several relay stations are interconnected by means of a switch through a special wired networking device, a special microwave link device or a special wireless networking frequency device. The wired networking mode depends on the wired link, and the use scenes are limited, so that the wired networking mode can be influenced by the environment and natural climate; other wireless methods require adding special link devices or networking devices in the system to achieve interconnection between the relay stations, which complicates the system and increases maintenance difficulty.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a networking method and a networking system for the same-frequency and same-broadcast of a relay station and the relay station, and solves at least one problem in the prior art.
The invention discloses the following technical scheme:
on the one hand, the invention provides a networking method for the same-frequency simulcasting of a relay station, which comprises the following steps:
the first relay station sets a first time slot as a working time slot and sets a second time slot as an interconnection time slot with at least one other relay station; and a group of double frequency points is set, including an uplink frequency F1 and a downlink frequency F2.
The first relay station receives data sent by the mobile terminal in an uplink frequency working time slot F1-1 according to a relay station protocol, and forwards the data to other relay stations in an uplink frequency interconnection time slot F1-2; all the relay stations send data to the mobile terminals covered by the relay stations in the unified downlink frequency working time slot F2-1; wherein, other relay stations are provided with the working time slot and the interconnection time slot.
Further, the method further comprises:
the first relay station receives data in an uplink frequency working time slot F1-1 of the second relay station and forwards the data to the second relay station in an uplink frequency interconnection time slot F1-2 of the first relay station; the second relay station is any one of the other relay stations.
Further, the first relay station and the second relay station transmit data to the mobile terminals under their coverage in the downlink frequency operation time slot F2-1.
Further, the first relay station is a fixed relay station or a mobile relay station.
In a second aspect, the present invention further provides a relay station, including:
the setting unit is used for setting the first time slot as a working time slot and setting the second time slot as an interconnection time slot with at least one other relay station; and a group of double frequency points is set, including an uplink frequency F1 and a downlink frequency F2.
The first receiving and sending unit is used for receiving data sent by the mobile terminal in an uplink frequency working time slot F1-1 according to a relay station protocol and forwarding the data to other relay stations in an uplink frequency interconnection time slot F1-2; so that other relay stations can send data to mobile terminals covered by the relay stations in the unified downlink frequency working time slot F2-1; wherein, other relay stations are provided with working time slots and interconnection time slots.
Further, the relay station further comprises:
the second receiving and sending unit is used for receiving data in an uplink frequency working time slot F1-1 of the second relay station and forwarding the data to the second relay station in an uplink frequency interconnection time slot F1-2 of the second receiving and sending unit; the second relay station is any one of the other relay stations.
Further, the first relay station is a fixed relay station or a mobile relay station.
In a third aspect, the present invention provides a networking system for common-frequency and simulcasting of a relay station, which comprises:
at least two relay stations according to the second aspect, wherein one relay station is a first relay station, the first relay station sets a first time slot as an operating time slot, and sets a second time slot as an interconnection time slot with at least one other relay station; and a group of double frequency points is set, including an uplink frequency F1 and a downlink frequency F2.
The first relay station receives data sent by the mobile terminal in an uplink frequency working time slot F1-1 according to a relay station protocol, and forwards the data to other relay stations in an uplink frequency interconnection time slot F1-2; the other relay stations transmit data to the mobile terminals under their coverage in the unified downlink frequency operating time slot F2-1.
Further, the relay stations in the system are all fixed relay stations, or all mobile relay stations, or partly fixed relay stations and partly mobile relay stations.
The beneficial effects of the invention can be seen from the above description:
in order to implement the interconnection between two relay stations, a first relay station needs to set a time slot as a working time slot, and the other time slot is used as an interconnection time slot; and a group of double frequency points is set and set, including an uplink frequency F1 and a downlink frequency F2, the data sent by the terminal is received in an uplink frequency working time slot F1-1, and the data is forwarded in an uplink frequency interconnection time slot F1-2 and a downlink frequency working time slot F2-1, so that the function of co-frequency simulcasting is realized, the coverage area of the wireless communication network is enlarged, or the communication reliability of the coverage area is improved. Therefore, other relay stations can search and receive data in the uplink frequency interconnection time slot of the first relay station, and interconnection between the first relay station and other relay stations is realized. It can be seen that the technical scheme of the invention does not need to increase hardware equipment or occupy independent frequency resources when realizing the common-frequency simulcast interconnection of the relay stations, and can meet the requirements of actual communication technology.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a flowchart of an embodiment of a networking method for common-frequency simulcasting of a relay station according to the present invention;
fig. 2 is a schematic diagram illustrating a principle of a networking method for common-frequency simulcasting of a relay station according to an embodiment of the present invention;
fig. 3 is a flowchart of a networking method for common-frequency simulcasting of a relay station according to another embodiment of the present invention.
F1 uplink frequency; f1-1 uplink frequency working time slot; f1-2 uplink frequency interconnection time slot; f2 downlink frequency; f2-1 down frequency working time slot.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Embodiment 1, referring to fig. 1 and 2, a method for networking a relay station with the same frequency and the same broadcast includes:
The relay station conforms to the pdt (police Digital trunking) police Digital trunking communication system standard/dmr (Digital Mobile radio) Digital trunking communication standard, and the relay station employs a TDMA (Time Division Multiple access) technology.
Time Division Multiple Access (TDMA) is a method in which Time is divided into periodic frames, each frame is divided into a plurality of Time slots to transmit signals to a relay station, and the relay station can receive the signals of mobile terminals in the Time slots respectively without mixing under the condition of satisfying timing and synchronization. At the same time, the signals transmitted by the relay station to several mobile terminals are arranged in the given time slot in order and transmitted, and each mobile terminal can distinguish and receive the signal sent to it in the combined signal as long as it is received in the given time slot.
Here, the relay station has two time slots, and both time slots can carry out voice call, and can simultaneously support two paths of voice calls at most, namely, the working mode of the relay station is a double-time-slot time division working mode of a PDT/DMR digital system. One time slot is used as an operating time slot for communication of the local terminal, and the other time slot is used as an interconnection time slot for communication between the relay stations. The terminal in this embodiment may be a terminal device supported by a digital interphone system, such as a handheld interphone, a vehicle (ship, airplane) interphone, and the like.
If in practical application the first relay station needs to be interconnected with the second relay station and the third relay station respectively, the timeslot 1 of the first relay station may be set as its working timeslot, and the timeslot 2 may be set as an interconnection timeslot with the second relay station and the third relay station, that is, the first relay station can communicate with the second relay station and the third relay station only through the timeslot 2.
In practical applications, the first relay station may be a fixed relay station or a mobile relay station, and similarly, the other relay stations may be fixed relay stations or mobile relay stations. The technical scheme of the embodiment of the invention can realize the interconnection of the fixed relay stations, the interconnection of the mobile relay stations and the fixed relay stations. In practical application, which type of relay stations are interconnected with each other is determined according to practical application scenarios.
102, a first relay station receives data sent by a mobile terminal according to a relay station protocol in an uplink frequency working time slot F1-1; step 103, the first relay station forwards the data to the other relay stations in the uplink frequency interconnection time slot F1-2 according to the protocol of the relay stations.
Because the first relay station sets the function of each time slot, the local terminal of the first relay station can only send or receive data in the corresponding time slot, for example, the time slot 1 is used as a working time slot, the time slot 2 is used as an interconnection time slot, the uplink frequency of the first relay station is F1, and the downlink frequency is F2; therefore, the local terminal transmits data in F1 frequency slot 1 (i.e., the uplink frequency operating slot F1-1), the first relay station receives the data in F1 frequency slot 1 (i.e., the uplink frequency operating slot F1-1), and then forwards the data in F1 frequency slot 2 (i.e., the uplink frequency interconnection slot F1-2), as shown in fig. 2.
104, all the relay stations send data to the mobile terminals covered by the relay stations in the uniform downlink frequency working time slot F2-1 according to the PDT/DMR protocol; wherein, other relay stations are provided with the working time slot and the interconnection time slot.
Example 2, see figures 2 and 3:
the first communication station is specifically a base station A, the mobile terminal interphone 1 to which the base station A belongs initiates a call, and the base station A receives a signal transmitted by the radio station through the frequency F1-1; wherein F1-1 is the uplink frequency operating time slot of the base station A.
When the base station a receives the signaling sent by the radio station, in two time slots, the base station a will perform the following processing on the received signal respectively:
(1) in the time slot 2, unlike the general relay station, the 2 time slot is not used for a call, but for a forward signal networking, i.e., an interconnection time slot. The base station A forwards the received frequency F1-1 to the base station B in the time slot 2, so that the effect of the base station A and the base station B on the same-frequency simulcasting networking is achieved, the base station B can also forward the signal to the radio station to which the base station B belongs, and the walkie-talkies (namely the walkie-talkies 1-3) covered by the base station A and the base station B can talk with each other. In this case, the other relay station is specifically the base station B.
(2) In time slot 1, i.e. the working time slot, the base stations a and B simultaneously transmit signals to the interphones to which the base stations belong through the working time slot of the downlink frequency of the frequency F2-1 for receiving, and form a call in the time slot 1.
The base station B sends the received signals to the interphone 3 of the mobile terminal to which the base station B belongs through the frequency F2-1, and the interphone 2 and the interphone 3 can communicate with the calling interphone 1 after receiving the signals, so that the coverage area of the base station B can also receive the signals of the mobile terminal to which the base station A belongs. Automatic networking within the coverage areas of base stations a and B is achieved. The flow chart is shown in fig. 3.
Embodiment 3, F1 and F2 are a pair of standard transceiver frequencies separated by 10MHz or 12.5Khz, and divided into 2 slots. A relay station A, a relay station B, a relay station C … …, an interphone 1, an interphone 2, an interphone 3 and an interphone X … … are arranged. The interphone 1 initiates a call, the uplink frequency is F1 to the relay station A, the relay station A receives the F1 signal and then sends F2 to the corresponding interphone 2 to complete the relay function, meanwhile, the relay station A sends F1-2, the relay station B receives the F1-2 signal and then forwards F2 to the interphone 3, the interphones 1, 2 and 3 can realize mutual communication, and the relay station A, the relay station B and … … form a same-frequency simulcast network. By analogy, any nearby relay station which can receive the F1-2 signal can be automatically networked, so that the same-frequency broadcasting is realized, and the coverage range is enlarged.
All the relay stations use the same frequency pair, and do not depend on any special physical link and frequency, so that automatic networking is realized, and the same-frequency simulcasting is realized.
Embodiment 4, a relay station, comprising:
and the setting unit is used for setting the first time slot as a working time slot and setting the second time slot as an interconnection time slot with at least one other relay station.
The first receiving and sending unit is used for receiving data sent by the mobile terminal according to the protocol of the relay station in the uplink frequency working time slot and forwarding the data to other relay stations in the uplink frequency interconnection time slot; so that other relay stations can send the data to the mobile terminal covered by the relay stations according to PDT/DMR protocol in the unified downlink frequency working time slot; and other relay stations are provided with working time slots and the interconnection time slots.
Further, the relay station further comprises:
a second receiving and sending unit, configured to receive data in an uplink frequency working timeslot of a second relay station according to a PDT/DMR protocol, and forward the data to the second relay station in an uplink frequency interconnection timeslot of the second relay station; the second relay station is any one of the other relay stations.
Further, the relay station is a fixed relay station or a mobile relay station.
Embodiment 5, a networking system for common-frequency simulcasting of a relay station, the system comprising:
at least two relay stations according to embodiment 3, wherein one relay station is a first relay station, the first relay station sets a first time slot as an active time slot and sets a second time slot as an inter-working time slot with at least one other relay station.
The first relay station receives data sent by the mobile terminal according to the relay station protocol in the uplink frequency working time slot, and forwards the data to other relay stations in the uplink frequency interconnection time slot; and other relay stations send data to the mobile terminals under the coverage of the relay stations in the unified downlink frequency working time slot according to the PDT/DMR protocol.
Further, the relay stations in the system are all fixed relay stations, or all mobile relay stations, or partly fixed relay stations and partly mobile relay stations.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (3)
1. A networking method for the same-frequency and simulcasting of a relay station is characterized by comprising the following steps:
the first relay station sets a first time slot as a working time slot and sets a second time slot as an interconnection time slot with at least one other relay station; setting a group of double frequency points including an uplink frequency (F1) and a downlink frequency (F2);
the first relay station receives data sent by the mobile terminal in an uplink frequency working time slot (F1-1) and forwards the data to other relay stations in an uplink frequency interconnection time slot (F1-2);
all the relay stations send the data to the mobile terminals covered by the relay stations in a unified downlink frequency working time slot (F2-1);
wherein, the other relay stations are provided with the working time slots and the interconnection time slots;
the first relay station receives data in an uplink frequency working time slot (F1-1) and forwards the data to a second relay station in an uplink frequency interconnection time slot (F1-2); the second relay station is any one of the other relay stations;
said first relay station and said second relay station transmitting said data to mobile terminals under their coverage during a downlink frequency operating time slot (F2-1);
the first relay station is a fixed relay station or a mobile relay station.
2. A relay station, characterized in that said relay station comprises:
the device comprises a setting unit, a transmission unit and a receiving unit, wherein the setting unit is used for setting an uplink frequency first time slot as a working time slot and setting an uplink frequency second time slot as an interconnection time slot with at least one other relay station; setting a group of double frequency points including an uplink frequency (F1) and a downlink frequency (F2);
a receiving and sending unit, which is used for receiving the data sent by the mobile terminal in the uplink frequency working time slot (F1-1) and forwarding the data to other relay stations in the uplink frequency interconnection time slot (F1-2); so that all the relay stations transmit the data to the mobile terminals under the coverage thereof in the downlink frequency working time slot (F2-1); the other relay stations are provided with the working time slots and the interconnection time slots;
a second receiving and transmitting unit for receiving data in an upstream frequency working timeslot (F1-1) of the second relay station according to the PDT/DMR protocol and forwarding said data to the second relay station in its own upstream frequency interconnection timeslot (F1-2); the second relay station is any one of the other relay stations;
one relay station is used as a first relay station, the first relay station sets a first time slot as a working time slot, and sets a second time slot as an interconnection time slot with at least one other relay station; setting a group of double frequency points including an uplink frequency (F1) and a downlink frequency (F2);
the first relay station receives data sent by the mobile terminal in an uplink frequency working time slot (F1-1) according to a relay station protocol, and forwards the data to other relay stations in an uplink frequency interconnection time slot (F1-2);
the other relay stations send the data to the mobile terminals under the coverage of the other relay stations according to a PDT/DMR protocol at a unified downlink frequency working time slot (F2-1);
the relay station is a fixed relay station or a mobile relay station.
3. A relay station according to claim 2, characterized in that said relay stations are all fixed relay stations, or are all mobile relay stations, or are partly fixed relay stations and partly mobile relay stations.
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| CN201811603865.1A CN109698717B (en) | 2018-12-26 | 2018-12-26 | Networking method for common-frequency and simulcasting of relay station and relay station |
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| CN110446209B (en) * | 2019-08-07 | 2022-07-12 | 广州维德科技有限公司 | Communication system based on dual-frequency ad hoc network base station and implementation method thereof |
| CN110351671A (en) * | 2019-08-07 | 2019-10-18 | 广州维德科技有限公司 | A kind of double frequency suitching type self-organized network communication method |
| CN111194025B (en) * | 2020-04-09 | 2020-08-07 | 北京中兴高达通信技术有限公司 | Multi-hop communication method, terminal, BS equipment and system |
| CN113490153A (en) * | 2021-06-25 | 2021-10-08 | 海南宝通实业公司 | Multi-mode base station transfer networking switching method, system and computer equipment |
| CN116233768B (en) * | 2023-05-10 | 2023-08-15 | 广州盈科技术有限公司 | Signal detection method and system based on duplex communication |
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