CN110233631B

CN110233631B - Method for supporting quick automatic networking of two single-frequency transfer platforms

Info

Publication number: CN110233631B
Application number: CN201910505965.9A
Authority: CN
Inventors: 赖镜灵; 宋洋军; 姚忠邦; 付文良
Original assignee: Fujian Kirisun Communications Co ltd
Current assignee: Fujian Kirisun Communications Co ltd
Priority date: 2019-06-12
Filing date: 2019-06-12
Publication date: 2021-08-20
Anticipated expiration: 2039-06-12
Also published as: CN110233631A

Abstract

The invention provides a method for supporting quick and automatic networking of two single-frequency transfer platforms, which comprises the following steps: the first mobile station MS is communicated with the first single-frequency relay station SFR, and the second mobile station MS is communicated with the second single-frequency relay station SFR; a second mobile station MS initiates a service, the service is forwarded through a second single-frequency relay station SFR, then the service is forwarded again through a first single-frequency relay station SFR, and the first mobile station MS receives the service forwarded by the first single-frequency relay station SFR; or, the first mobile station MS initiates a service, the service is forwarded through the first single frequency relay station SFR, then the second single frequency relay station SFR is forwarded again, and the second mobile station MS receives the service forwarded by the first single frequency relay station SFR; therefore, the intercommunication of the first mobile station MS and the second mobile station MS in different network areas is realized. The method of the invention enables two single-frequency relay stations to automatically form a network, and doubles the network topology area.

Description

Method for supporting quick automatic networking of two single-frequency transfer platforms

Technical Field

The invention relates to the technical field of single-frequency transfer platforms, in particular to a method for supporting quick and automatic networking of two single-frequency transfer platforms.

Background

In a DMR (Digital Mobile Radio)/PDT (Digital Trunking) Digital Mobile communication system, a TDMA (Time division multiple access) scheme of two slots is used. The aligned channel pattern is shown in fig. 6. A frame consists of two slots, each of which is 30 milliseconds. A voice superframe consists of A, B, C, D, E and F frames for a total of 360 milliseconds.

The main working principle of the SFR single-frequency transfer platform is that the SFR single-frequency transfer platform works in a direct-through mode, one time slot is used for receiving, and the other time slot is used for transmitting. Therefore, other terminals carry out the call service under the direct channel, the SFR single-frequency relay station uses one time slot to receive the call service and then forwards the call service in the other time slot, so that the call distance is increased, the investment of user cost is reduced, and the SFR single-frequency relay station is light in weight and convenient to carry. As shown in fig. 7, the single frequency relay station forwards the voice traffic of the MS, receiving data in one time slot of one frame and forwarding out in another time slot of the next frame, offset by 90MS, wherein a superframe of the voice traffic is composed of A, B, C, D, E, F frames.

In some emergency scenes, such as fire emergency, underground (tunnel) accident rescue, petrochemical explosion rescue, geological disaster rescue, etc., an emergency networking scheme is needed to realize the topology of the network.

Disclosure of Invention

In order to overcome the defects in the prior art, the invention aims to provide a method for supporting the quick and automatic networking of two single-frequency transfer platforms, so as to overcome the defects in the prior art.

In order to achieve the above object, the present invention provides a method for supporting fast automatic networking of two single frequency transit stations, the method comprising: the first mobile station MS is communicated with the first single-frequency relay station SFR, and the second mobile station MS is communicated with the second single-frequency relay station SFR; the first single-frequency transfer platform SFR and the second single-frequency transfer platform SFR are respectively provided with three frequency points F1, F2 and F3 as dynamic frequency points, and the dynamic frequency points are any frequency point of F1, F2 or F3 which can be dynamically selected to be used in work; the scanning channel lists used by the first mobile station MS and the second mobile station MS are provided with three through channels CH1, CH2 and CH3, wherein the receiving frequency point of CH1 is F1, the receiving frequency point of CH2 is F2, the receiving frequency point of CH3 is F3, and the transmitting frequency points of CH1, CH2 and CH3 are all F1; the second mobile station MS initiates a service, the service is forwarded through the second single-frequency relay station SFR, then the service is forwarded again through the first single-frequency relay station SFR, and the first mobile station MS receives the service forwarded by the first single-frequency relay station SFR; or the first mobile station MS initiates a service, the service is forwarded through the first single-frequency relay station SFR, then the service is forwarded by the second single-frequency relay station SFR, and the second mobile station MS receives the service forwarded by the second single-frequency relay station SFR; therefore, the intercommunication of the first mobile station MS and the second mobile station MS in different network areas is realized.

As a further description of the method of the present invention, preferably, the first single frequency relay station SFR and the second single frequency relay station SFR set an SQ signaling for interaction, where the SQ signaling is composed of five identical reverse signaling RCs, and each reverse signaling RC has a field to fill the received mobile station signal strength RSSI; after being broadcasted by the mobile station signal strength RSSI in the reverse signaling RC, the first single-frequency transfer platform SFR and the second single-frequency transfer platform SFR determine a single-frequency transfer platform SFR closest to the transmitting terminal MS to forward the terminal service, and the other single-frequency transfer platform SFR is used for forwarding the service of the single-frequency transfer platform SFR; when the first frame received by the first single-frequency transfer platform SFR is a frame sent by a mobile station, switching to an F2 frequency point in another time slot of the current frame to transmit an SQ signaling; when the first frame received by the second single frequency relay station SFR is the frame sent by the mobile station, the second time slot of the next frame is switched to the F2 frequency point to transmit SQ signaling.

As a further description of the method of the present invention, preferably, when the first mobile station MS initiates a voice call at frequency point F1, the first single frequency relay set SFR scans for waiting and receives LC frames at frequency point F1, and the second single frequency relay set SFR scans for waiting and receives LC frames at frequency point F1, the method includes the following steps:

A1) after receiving a first frame which is an LC frame sent by a first mobile station MS, a first single frequency transfer platform SFR is appointed to use an F2 frequency point as a transmitting frequency point to send an SQ1 signaling in another time slot of a current frame after receiving the LC frame, the first single frequency transfer platform SFR is used for telling a second single frequency transfer platform SFR to receive the signal intensity of the first mobile station MS by itself, and after sending the SQ1 signaling, the second single frequency transfer platform SFR is switched back to an F1 frequency point to continue receiving the frame of the first mobile station MS; after the second single frequency transfer platform SFR is agreed to receive the frame sent by the first mobile station MS in the first frame, using the F2 frequency point as a receiving frequency point waiting SQ1 signaling in another time slot of the current frame after the LC frame is received, and switching back to the F1 frequency point to continuously receive the transmitting frame of the first mobile station MS when the time slot is ended;

A2) after receiving the LC frame, the second single frequency relay SFR uses the F2 frequency point as a transmitting frequency point to send SQ2 signaling in the second time slot of the next frame after receiving the LC frame, and the signaling is used for telling the first single frequency relay SFR to receive the signal intensity of the first mobile station MS; comparing the strength of the mobile station signal in the SQ1 signaling and the SQ2 signaling by the first single-frequency transfer table SFR, if the SQ1 is less than or equal to the SQ2, the distance between the first single-frequency transfer table SFR and the second single-frequency transfer table SFR is closer, and at the moment, the first single-frequency transfer table SFR does not wait for reception at the F1 frequency point, but switches to the F2 frequency point in one time slot to wait for reception of a frame sent by the second single-frequency transfer table SFR and forwards the frame at the F3 frequency point in the other time slot; if SQ1 is greater than SQ2, it indicates that the distance between the first mobile station MS and the first single frequency relay SFR is closer, and at this time, the first single frequency relay SFR will continue to watch on one timeslot to receive the first mobile station MS with F1 frequency point and another timeslot will forward the frame of the first mobile station MS with F2 frequency point; after the first single frequency transfer table SFR is agreed to receive the LC frame, the first time slot of the next frame after receiving the LC frame uses the F2 frequency point as a receiving frequency point waiting to receive the SQ2 signaling; comparing the strength of the mobile station signal in SQ1 signaling and SQ2 signaling by a first single frequency transfer table SFR, if SQ1 is less than or equal to SQ2, the distance between a first mobile station MS and a second single frequency transfer table SFR (B2) is closer, and at the moment, the first single frequency transfer table SFR does not wait and receive at a F1 frequency point, but switches to an F2 frequency point in one time slot to wait and receive a frame sent by the second single frequency transfer table SFR and forwards the frame at another time slot by an F3 frequency point; if SQ1 is greater than SQ2, it indicates that the distance between the first mobile station MS and the first single frequency relay SFR is closer, and at this time, the first single frequency relay SFR will continue to watch on one timeslot to receive the first mobile station MS with F1 frequency point and another timeslot will forward the frame of the first mobile station MS with F2 frequency point;

A3) if SQ1 is greater than SQ2, which means that the distance between the first mobile station MS and the first single frequency relay set SFR is closer, then the first single frequency relay set SFR will continue to receive the first mobile station MS in one timeslot with the F1 frequency point watch while another timeslot forwards the frame of the first mobile station MS with the F2 frequency point; the second single-frequency relay station SFR does not wait for reception at the F1 frequency point, but switches to the F2 frequency point in one time slot to wait for reception of the frame sent by the first single-frequency relay station SFR and forwards the frame with the F3 frequency point after the other time slot deviates by 90ms, and at the moment, the second single-frequency relay station SFR receives the LC frame and forwards the LC frame after the second single-frequency relay station SFR deviates by 90 ms;

A4) the second single-frequency relay station SFR deviates 90ms to forward the frame of the first single-frequency relay station SFR; when receiving, the second mobile station MS works in a scanning mode, and respectively and sequentially circulates to take scanning list members CH1/CH2/CH3 as receiving watchdogs and stays on a channel with the strongest signal strength, wherein the strongest signal strength received by the second mobile station MS is from a second single-frequency relay station SFR; through the steps a1) to a step a4), the frame transmitted by the first mobile station MS is forwarded by the first single frequency relay station SFR, and then forwarded by the second single frequency relay station SFR, and the second single frequency relay station SFR can receive the frame of the first mobile station MS, thereby realizing communication of two different networks.

As a further description of the method of the present invention, preferably, when the first mobile station MS initiates a voice call at frequency point F1, the first single frequency relay set SFR scans for waiting, and receives an LC frame at frequency point F1, and the second single frequency relay set SFR scans for waiting, and does not receive an LC frame, the method includes the following steps:

B1) if the second single frequency relay SFR does not receive the LC frame sent by the first mobile station MS or the frame sent by the first single frequency relay SFR, the frequency point scanning waiting with F1/F2/F3 is circulated in sequence;

B2) after receiving a first frame which is an LC frame sent by a first mobile station MS, a first single frequency relay station SFR is appointed to send an SQ1 signaling by using an F2 frequency point as a transmitting frequency point in another time slot of a current frame after receiving the LC frame, so as to tell another single frequency relay station that the signal intensity of the first mobile station MS is received by the other single frequency relay station, and after sending the SQ1 signaling, the first single frequency relay station SFR is switched back to an F1 frequency point to continuously receive the transmitting frame of the first mobile station MS; after receiving an SQ1 signaling sent by a first single frequency relay SFR, scanning and waiting by a second single frequency relay SFR, and determining that the distance between a first mobile station MS and the second single frequency relay SFR of a sender is farther than the distance between the first mobile station MS and the first single frequency relay SFR when the second single frequency relay SFR is agreed to receive an SQ1 signaling frame sent by the first single frequency relay SFR;

B3) after receiving a SQ1 signaling frame sent by a first single frequency transfer platform SFR, a second single frequency transfer platform SFR is appointed to send an SQ2 signaling by using an F2 frequency point as a transmitting frequency point in a second time slot of a next frame after receiving the SQ1 signaling, and when the distance between a first mobile station MS and the second single frequency transfer platform SFR is farther, the second single frequency transfer platform SFR is switched to the F2 frequency point in one time slot to watch and receive the frame sent by the first single frequency transfer platform SFR and forwards the frame by using an F3 frequency point in the other time slot; after a first single frequency relay SFR is agreed to receive a first frame which is sent by a first mobile station MS, an F2 frequency point is used as a receiving frequency point waiting for a first time slot of a next frame after an LC frame is received, and an SQ2 signaling is received; when the RSSI of SQ1 is greater than the RSSI of SQ2, the distance between the first mobile station MS and the first single frequency relay SFR is closer than the distance between the first mobile station MS and the second single frequency relay SFR, the first single frequency relay SFR will receive the frame of the first mobile station MS at the F1 frequency point in the first time slot of the next frame, and start to forward the frame of the first mobile station MS at the second time slot of the next frame, and then will continue to receive the frame of the first mobile station MS at the F1 frequency point in one time slot, and the other time slot will forward the frame of the first mobile station MS at the F2 frequency point;

B4) when the first mobile station MS is closer to the first single frequency relay SFR, the first single frequency relay SFR continuously receives the frame of the first mobile station MS in a time slot by using a frequency point F1, and the other time slot forwards the frame of the first mobile station MS by using a frequency point F2; the first mobile station MS is farther away from the second single-frequency relay SFR, the second single-frequency relay SFR is switched to the F2 frequency point in one time slot to watch and receive the frame sent by the first single-frequency relay SFR and forwards the frame by shifting the F3 frequency point for 90MS in the other time slot, and the second single-frequency relay SFR receives the LC frame and forwards the LC frame by shifting the frequency for 90 MS;

B5) the second single-frequency relay station SFR deviates 90ms to forward the frame of the first single-frequency relay station SFR; when receiving, the second mobile station MS works in a scanning mode, and respectively and sequentially circulates to take scanning list members CH1/CH2/CH3 as receiving watchdogs and stays on a channel with the strongest signal strength, wherein the strongest signal strength received by the second mobile station MS is from a second single-frequency relay station SFR; through the above steps B1) to B5), the frame transmitted by the first mobile station MS is forwarded by the first single frequency relay station SFR, and then forwarded by the second single frequency relay station SFR, the second mobile station MS can receive the frame transmitted by the first mobile station MS, thereby implementing communication of two different networks.

As a further description of the method of the present invention, preferably, when the first mobile station MS initiates a voice call at frequency point F1, the first single frequency relay set SFR scans for waiting, no LC frame is received, the second single frequency relay set SFR scans for waiting, and an LC frame is received at frequency point F1, the method includes the following steps:

C1) if the first single frequency relay SFR is agreed to not receive the LC frame sent by the first mobile station MS or the frame sent by the second single frequency relay SFR, the first single frequency relay SFR sequentially circulates to scan and wait at the frequency point F1/F2/F3; whether the first single-frequency relay station SFR receives the A/B/C/D/E/F frame sent by the first mobile station MS or not at the moment, the first single-frequency relay station SFR continues scanning; after the second single frequency transfer platform SFR is agreed to receive the frame sent by the first mobile station MS in the first frame, using the F2 frequency point as a receiving frequency point waiting SQ1 signaling in another time slot of the current frame after the LC frame is received, and switching back to the F1 frequency point to continuously receive the transmitting frame of the first mobile station MS when the time slot is ended; when the second single frequency relay station SFR does not receive the SQ1 signaling sent by the first single frequency relay station SFR, the first mobile station MS is considered to be closer to the second single frequency relay station SFR, and the frame sent by the first mobile station MS is forwarded by starting at the frequency point F2 in the second time slot of the next frame;

C2) when the second single frequency relay station SFR considers that the distance between the first mobile station MS and the second single frequency relay station SFR (B2) is closer, the second single frequency relay station SFR starts to forward the frame sent by the first mobile station MS at the position by the frequency point F2; after the first single-frequency relay station SFR scans and waits for the frame sent by the second single-frequency relay station SFR, the frame sent by the second single-frequency relay station SFR is received and waited for at the time slot by the frequency point F2, and the frame of the first mobile station MS is forwarded at the frequency point F3 when the other time slot deviates by 90 MS;

C3) the first single-frequency transfer platform SFR deviates 90MS to forward the frame sent by the second single-frequency transfer platform SFR, and the second mobile station MS works in a scanning mode when receiving the frame and can scan and receive the frame sent by the first single-frequency transfer platform SFR; through the steps C1) to C3), the frame transmitted by the first mobile station MS is forwarded by the second single frequency relay station SFR, and then forwarded by the first single frequency relay station SFR, the second mobile station MS can receive the frame transmitted by the first mobile station MS, thereby implementing communication of two different networks.

The invention has the following beneficial effects: the method of the invention can determine which single-frequency relay station the transmitting terminal MS is closer to after two single-frequency relay stations broadcast by signal strength RSSI in SQ signaling, thereby determining to forward the terminal service by using the closest single-frequency relay station, and the other single-frequency relay station is used for forwarding the service of the single-frequency relay station, so that the two single-frequency relay stations automatically form a network, and the network topology area is doubled.

Drawings

FIG. 1 is a schematic diagram of two transfer table networks of the present invention;

fig. 2 is a schematic diagram of an SQ signaling burst consisting of five reverse signaling RCs according to the present invention;

FIG. 3 is a diagram illustrating a first single frequency relay station arbitration case according to the present invention;

FIG. 4 is a diagram illustrating a second arbitration situation of the single frequency relay station according to the present invention;

FIG. 5 is a diagram illustrating a third arbitration case of the single frequency relay station according to the present invention;

FIG. 6 is a diagram illustrating a prior art aligned channel pattern;

fig. 7 is a diagram illustrating a single frequency relay mode in the prior art.

Detailed Description

To further understand the structure, characteristics and other objects of the present invention, the following detailed description is given with reference to the accompanying preferred embodiments, which are only used to illustrate the technical solutions of the present invention and are not to limit the present invention.

As shown in fig. 1, fig. 1 is a schematic diagram of two relay stations networking of the present invention; a method for supporting quick automatic networking of two single-frequency transfer platforms supports automatic networking of the two single-frequency transfer platforms. The method comprises the following steps: the first mobile station MSA1 is in communication with a first single frequency relay station SFRA2, and the second mobile station MSB1 is in communication with a second single frequency relay station SFRB 2; the first single-frequency transfer platform SFRA2 and the second single-frequency transfer platform SFRB2 both have three frequency points F1, F2 and F3 as dynamic frequency points, and the dynamic frequency points are any one of the frequency points F1, F2 or F3 which can be dynamically selected and used in work; the scanning channel lists used by the first mobile station MSA1 and the second mobile station MSB1 are all provided with three through channels CH1, CH2 and CH3, wherein the receiving frequency point of CH1 is F1, the receiving frequency point of CH2 is F2, the receiving frequency point of CH3 is F3, and the transmitting frequency points of CH1, CH2 and CH3 are all F1; the second mobile station MSB1 initiates a service, the service is forwarded through a second single frequency relay station SFRB2, then the service is forwarded through a first single frequency relay station SFRA2, and the first mobile station MSA1 receives the service forwarded through the first single frequency relay station SFRA 2; or, the first mobile station MSA1 initiates a service, and forwards the service through the first single frequency relay station SFRA2, and then the second single frequency relay station SFRB2 forwards the service again, and the second mobile station MSB1 receives the service forwarded by the second single frequency relay station SFRB 2; thereby realizing the intercommunication of the first mobile station MSA1 and the second mobile station MSB1 in different network areas.

Both the first station MSA1 and the second station MSB1 are operating in scan mode, scanning in the order of the stations' scan list members. The first single frequency relay station SFRA2 and the second single frequency relay station SFRB2 are innovative in that they are no longer used only to forward traffic, but also to dynamically select channels.

The specific implementation process is as follows:

the first mobile station MSA1 and the second mobile station MSB1 work in a scanning mode when in standby receiving, a scanning channel list comprises CH1, CH2 and CH3, receiving frequency points of the scanning channel list are F1, F2 and F3 respectively, and transmitting frequency points of the scanning channel list are F1, so that the scanning channel list only uses F1 frequency point for transmitting when in service initiation; and the first single frequency transfer platform SFRA2 and the second single frequency transfer platform SFRB2 respectively take F1, F2 and F3 as receiving frequency points to cyclically scan and receive the waiting times in an idle state. When the mobile station MS transmits the LC frame and the single frequency relay station SFR transmits the LC frame, 1 bit is used for distinguishing, as shown in table 1, a Reserved of 0 indicates that the MS transmits, and a Reserved of 1 indicates that the single frequency relay station SFR forwards.

TABLE 1LC PDU content

Referring to fig. 2, fig. 2 is a schematic diagram of an SQ signaling burst composed of five reverse signaling RCs according to the present invention; the first single frequency relay station SFRA2 and the second single frequency relay station SFRB2 set a special SQ signaling for interaction, the SQ signaling is composed of five identical reverse signaling RCs, and 5 identical RCs are used for improving the reliability of receiving the RCs so that a receiving party can receive the signaling RC for multiple times, wherein one reverse signaling RC + EMB has 5ms time, the reverse signaling RC has 32 bits, and as shown in Table 2, fields are arranged in the RCs to fill the received signal strength RSSI.

TABLE 2RC content

The first single-frequency transfer platform SFRA2 and the second single-frequency transfer platform SFRB2 determine a single-frequency transfer platform SFR closest to the transmitting terminal MS to forward the terminal service after broadcasting by the mobile station signal strength RSSI in the reverse signaling RC, and the other single-frequency transfer platform SFR is used for forwarding the service of the single-frequency transfer platform SFR; wherein, when the first frame received by the first single frequency relay station SFRA2 is the frame sent by the mobile station, the second time slot of the current frame is switched to the F2 frequency point to transmit SQ signaling; when the first frame received by the second single frequency relay station SFRB2 is a frame sent by the mobile station, the second timeslot of the next frame is switched to the F2 frequency point to transmit SQ signaling.

When the first mobile station MSA1 initiates a call, the following situations occur:

case 1 as shown in fig. 3, when a first mobile station MSA1 initiates a voice call at a frequency point F1, a first single frequency relay station SFRA2 scans for waiting and receives LC frames at the frequency point F1, and a second single frequency relay station SFRB2 scans for waiting and receives LC frames at the frequency point F1, the method includes the following steps:

A1) after receiving a first frame which is an LC frame transmitted by a first mobile station MS A1, a first single frequency relay station SFRA2 uses an F2 frequency point as a transmitting frequency point to transmit SQ1 signaling in another time slot of a current frame after receiving the LC frame, the signaling is used for telling a second single frequency relay station SFRB2 to receive the signal intensity of a first mobile station MSA1, and after finishing transmitting the SQ1 signaling, the signaling is switched back to an F1 frequency point to continue to receive the frame of the first mobile station MSA 1;

after receiving a first frame which is a frame transmitted by a first mobile station MS A1, a second single frequency relay station SFRB2 is agreed to use an F2 frequency point as a receiving frequency point waiting SQ1 signaling in another time slot of a current frame after receiving an LC frame, and switches back to an F1 frequency point to continuously receive a transmission frame of the first mobile station MSA1 when the time slot is ended;

A2) after receiving the LC frame, the second single frequency relay station SFRB2 is agreed to send an SQ2 signaling using the F2 frequency point as a transmitting frequency point in the second timeslot of the next frame after receiving the LC frame, so as to tell the first single frequency relay station SFRA2 that the first mobile station MSA1 receives the signal strength of the first mobile station itself;

comparing the strength of the mobile station signal in the SQ1 signaling and the SQ2 signaling by the first single-frequency relay station SFRA2, if SQ1 is less than or equal to SQ2, it indicates that the distance between the first single-frequency relay station SFRA2 and the second single-frequency relay station SFRB2 is closer, and at this time, the first single-frequency relay station SFRA2 will not wait for reception at the F1 frequency point, but switches to the F2 frequency point at one time slot to wait for reception of the frame sent by the second single-frequency relay station SFRB2 and forwards the frame at the F3 frequency point at the other time slot; if SQ1 is greater than SQ2, it indicates that the distance between the first mobile station MSA1 and the first single frequency relay station SFRA2 is closer, at this time, the first single frequency relay station SFRA2 will continue to watch on one timeslot to receive the first mobile station MSA1 with F1 frequency point and forward the frame of the first mobile station MSA1 with F2 frequency point in another timeslot;

after the first single frequency relay station SFRA2 is agreed to receive the LC frame, the first time slot of the next frame after receiving the LC frame uses the F2 frequency point as a receiving frequency point to watch and receive the SQ2 signaling;

comparing the strength of the mobile station signal in the SQ1 signaling and the SQ2 signaling by the first single-frequency relay station SFRA2, if SQ1 is less than or equal to SQ2, it indicates that the distance between the first mobile station MSA1 and the second single-frequency relay station SFRB2 is closer, and at this time, the first single-frequency relay station SFRA2 will not wait for reception at the F1 frequency point, but switches to the F2 frequency point in one time slot to wait for reception of the frame sent by the second single-frequency relay station SFRB2 and forwards the frame at the F3 frequency point in the other time slot; if SQ1 is greater than SQ2, it indicates that the distance between the first mobile station MSA1 and the first single frequency relay station SFRA2 is closer, at this time, the first single frequency relay station SFRA2 will continue to watch on one timeslot to receive the first mobile station MSA1 with F1 frequency point and forward the frame of the first mobile station MSA1 with F2 frequency point in another timeslot;

A3) if SQ1 is greater than SQ2, which means that the distance between the first mobile station MSA1 and the first single frequency relay station SFRA2 is closer, then the first single frequency relay station SFRA2 will continue to watch on one timeslot to receive the first mobile station MSA1 with F1 frequency point and forward the frame of the first mobile station MSA1 with F2 frequency point in another timeslot;

the second single-frequency transfer platform SFRB2 will not wait for reception at the F1 frequency point, but will switch to the F2 frequency point at one time slot to wait for reception of the frame sent by the first single-frequency transfer platform SFRA2 and forward the frame with the F3 frequency point shifted by 90ms at the other time slot, at this time, the second single-frequency transfer platform SFRB2 receives the LC frame, and will shift by 90ms to forward the LC frame;

A4) the second single frequency relay station SFRB2 can deviate by 90ms to forward the frame of the first single frequency relay station SFRA 2; when the second station MSB1 receives the signals, the second station MSB1 works in the scanning mode, and the second station MSB1 respectively and sequentially circulates to scan list members CH1/CH2/CH3 as the waiting for receiving and stays on the channel with the strongest signal intensity, wherein the strongest signal intensity received by the second station MSB1 is from a second single-frequency relay station SFRB 2;

through the steps from a1) to a step from a4), the frame transmitted by the first mobile station MSA1 is forwarded through the first single frequency relay station SFRA2, and then is forwarded through the second single frequency relay station SFRB2, and then the second single frequency relay station SFRB2 can receive the frame of the first mobile station MSA1, so that the communication of two different networks is realized.

Case 2 as shown in fig. 4, when the first mobile station MSA1 initiates a voice call at the frequency point F1, the first single frequency relay station SFRA2 scans and waits, and receives an LC frame at the frequency point F1, and the second single frequency relay station SFRB2 scans and waits, and does not receive an LC frame, the method includes the following steps:

B1) if the LC frame sent by the first mobile station MSA1 or the frame sent by the first single frequency relay station SFRA2 is not received, the second single frequency relay station SFRB2 is appointed to cycle to scan and wait at the frequency points F1/F2/F3 in sequence;

B2) after receiving a first frame which is an LC frame transmitted by a first mobile station MSA1, a first single frequency transfer station SFRA2 is agreed to use an F2 frequency point as a transmitting frequency point to transmit an SQ1 signaling in another time slot of the current frame after receiving the LC frame, so as to tell another single frequency transfer station that the signal intensity of the first mobile station MSA1 is received by the other single frequency transfer station, and after the SQ1 signaling is transmitted, the frequency point is switched back to an F1 frequency point to continuously receive the transmitting frame of the first mobile station MSA 1;

after receiving the SQ1 signaling sent by the first single frequency relay station SFRA2, the second single frequency relay station SFRB2 scans for a waiting time, and the second single frequency relay station SFRB2 is agreed that after receiving the SQ1 signaling frame sent by the first single frequency relay station SFRA2, the distance between the first mobile station MSA1 and the second single frequency relay station SFRB2 of the sender is considered to be farther than the distance between the first mobile station MSA1 and the first single frequency relay station SFRA 2;

B3) after receiving a SQ1 signaling frame sent by a first single frequency relay station SFRA2 in a first frame, a second single frequency relay station SFRB2 is appointed to send an SQ2 signaling by using an F2 frequency point as a transmitting frequency point in a second time slot of a next frame after receiving the SQ1 signaling, and when the distance between a first mobile station MSA1 and the second single frequency relay station SFRB2 is farther, the second single frequency relay station SFRB2 is switched to an F2 frequency point in one time slot to watch and receive the frame sent by the first single frequency relay station SFRA2 and to forward the frame by using an F3 frequency point in the other time slot;

after receiving a first frame which is a frame transmitted by the first mobile station MSA1, the first single frequency relay station SFRA2 is agreed to receive an SQ2 signaling by using an F2 frequency point as a receiving frequency point watch in the first time slot of the next frame after receiving the LC frame;

when the RSSI of SQ1 is greater than the RSSI of SQ2, the distance between the first mobile station MSA1 and the first single frequency relay station SFRA2 is closer than the distance between the first mobile station MSA1 and the second single frequency relay station SFRB2, the first single frequency relay station SFRA2 receives the frame of the first mobile station MSA1 at the frequency point F1 in the first time slot of the next frame, and starts to forward the frame of the first mobile station MSA1 at the second time slot of the next frame, and then continues to watch on the frequency point F1 in one time slot to receive the frame of the first mobile station MSA1, and the other time slot forwards the frame of the first mobile station MSA1 at the frequency point F2;

B4) when the distance between the first mobile station MSA1 and the first single frequency relay station SFRA2 is closer, the first single frequency relay station SFRA2 will continue to receive the frame of the first mobile station MSA1 in the F1 frequency point in one time slot, and forward the frame of the first mobile station MSA1 in the F2 frequency point in another time slot;

the first mobile station MSA1 is farther away from the second single-frequency transfer platform SFRB2, the second single-frequency transfer platform SFRB2 is switched to the F2 frequency point in one time slot to watch and receive the frame sent by the first single-frequency transfer platform SFRA2 and forwards the frame in the other time slot by shifting the F3 frequency point for 90ms, and the second single-frequency transfer platform SFRB2 receives the LC frame and shifts the LC frame for 90ms to forward the LC frame;

B5) the second single frequency relay station SFRB2 can deviate by 90ms to forward the frame of the first single frequency relay station SFRA 2; when the second station MSB1 receives the signals, the second station MSB1 works in the scanning mode, and the second station MSB1 respectively and sequentially circulates to scan list members CH1/CH2/CH3 as the waiting for receiving and stays on the channel with the strongest signal intensity, wherein the strongest signal intensity received by the second station MSB1 is from a second single-frequency relay station SFRB 2; through the above steps B1) to B5), the frame transmitted by the first mobile station MSA1 is forwarded through the first single frequency relay station SFRA2, and then is forwarded through the second single frequency relay station SFRB2, and then the second mobile station MSB1 can receive the frame transmitted by the first mobile station MSA1, thereby realizing communication of two different networks.

Case 3 as shown in fig. 5, when the first mobile station MSA1 initiates a voice call at the frequency point F1, the first single frequency relay station SFRA2 scans and waits, no LC frame is received, the second single frequency relay station SFRB2 scans and waits, and an LC frame is received at the frequency point F1, the method includes the following steps:

C1) if the first single frequency relay station SFRA2 is appointed to receive the LC frame sent by the first mobile station MS A1 or the frame sent by the second single frequency relay station SFRB2, the first single frequency relay station SFRA2 sequentially circulates to scan and wait at frequency points F1/F2/F3; whether the first single frequency relay station SFRA2 receives the A/B/C/D/E/F frame sent by the first mobile station MSA1 or not at this time, the first single frequency relay station SFRA2 will continue scanning;

after receiving a first frame which is a frame transmitted by a first mobile station MS A1, a second single frequency relay station SFRB2 is agreed to use an F2 frequency point as a receiving frequency point waiting SQ1 signaling in another time slot of a current frame after receiving an LC frame, and switches back to an F1 frequency point to continuously receive a transmission frame of the first mobile station MSA1 when the time slot is ended; when the second single-frequency relay station SFRB2 does not receive the SQ1 signaling sent by the first single-frequency relay station SFRA2, the distance between the first mobile station MSA1 and the second single-frequency relay station SFRB2 is considered to be closer, and the frame sent by the first mobile station MS a1 is forwarded at the F2 frequency point in the second time slot of the next frame;

C2) when the second single-frequency relay station SFRB2 considers that the distance between the first mobile station MSA1 and the second single-frequency relay station SFRB2 is shorter, the second single-frequency relay station SFRB2 starts to forward the frame sent by the first mobile station MS A1 at the position by the frequency point F2; after the first single-frequency relay station SFRA2 scans and waits for the frame sent by the second single-frequency relay station SFRB2, the frame sent by the second single-frequency relay station SFRB2 is received at the time slot by the frequency point F2, and the frame of the first mobile station MSA1 is forwarded at the frequency point F3 at the time when the other time slot deviates by 90 ms;

C3) the first single-frequency transfer station SFRA2 deviates by 90ms to forward frames sent by the second single-frequency transfer station SFRB2, and when the second station MSB1 receives the frames, the second station MSB works in a scanning mode and scans and receives the frames sent by the first single-frequency transfer station SFRA 2; through the steps C1) to C3), the frame transmitted by the first mobile station MSA1 is forwarded through the second single frequency relay station SFRB2, and then is forwarded through the first single frequency relay station SFRA2, and then the second mobile station MSB1 can receive the frame transmitted by the first mobile station MSA1, thereby realizing communication of two different networks.

It should be noted that the above summary and the detailed description are intended to demonstrate the practical application of the technical solutions provided by the present invention, and should not be construed as limiting the scope of the present invention. Various modifications, equivalent substitutions, or improvements may be made by those skilled in the art within the spirit and principles of the invention. The scope of the invention is to be determined by the appended claims.

Claims

1. A method for supporting fast and automatic networking of two single-frequency transit stations is characterized by comprising the following steps:

a first mobile station MS (a1) communicating with a first single frequency relay station SFR (a2), a second mobile station MS (B1) communicating with a second single frequency relay station SFR (B2);

the first single frequency transit table SFR (a2) and the second single frequency transit table SFR (B2) each have three frequency points F1, F2, and F3 as dynamic frequency points, which are any one of frequency points that can dynamically select to use F1, F2, or F3 in operation;

the scanning channel lists used by the first mobile station MS (A1) and the second mobile station MS (B1) are respectively provided with three through channels CH1, CH2 and CH3, wherein the receiving frequency point of CH1 is F1, the receiving frequency point of CH2 is F2, the receiving frequency point of CH3 is F3, and the transmitting frequency points of CH1, CH2 and CH3 are F1;

the second mobile station MS (B1) initiates a service, the service is forwarded through a second single frequency relay station SFR (B2), then the first single frequency relay station SFR (A2) is forwarded again, and the first mobile station MS (A1) receives the service forwarded by the first single frequency relay station SFR (A2); or, the first mobile station MS (a1) initiates a service, and forwards the service through the first single frequency relay station SFR (a2), and then the second single frequency relay station SFR (B2) forwards the service again, and the second mobile station MS (B1) receives the service forwarded by the second single frequency relay station SFR (B2); thereby realizing the interworking of the first mobile station MS (A1) and the second mobile station MS (B1) in different network areas;

the method comprises the steps that a first single frequency transfer platform SFR (A2) and a second single frequency transfer platform SFR (B2) set a SQ signaling to interact, wherein the SQ signaling consists of five identical reverse signaling RCs, and each reverse signaling RC is provided with a field for filling received mobile station signal strength RSSI;

a first single frequency relay station SFR (A2) and a second single frequency relay station SFR (B2) determine a single frequency relay station SFR closest to a transmitting terminal MS to forward terminal services after broadcasting by a mobile station signal strength RSSI in a reverse signaling RC, and the other single frequency relay station SFR is used for forwarding the services of the single frequency relay station SFR;

wherein, when the first frame received by the first single frequency transfer table SFR (a2) is the frame sent by the mobile station, the first single frequency transfer table SFR switches to the F2 frequency point in another time slot of the current frame to transmit SQ signaling; when the first frame received is the frame sent by the mobile station, the second single frequency relay station SFR (B2) will switch to the F2 frequency point in the second time slot of the next frame to transmit SQ signaling.

2. The method of claim 1, wherein when the first mobile station MS (a1) originates a voice call on frequency point F1, the first single frequency relay SFR (a2) scans for camping and receives LC frames on both frequency points F1, the second single frequency relay SFR (B2) scans for camping and receives LC frames on both frequency points F1, the method comprises the steps of:

A1) after receiving a first frame which is an LC frame transmitted by a first mobile station MS (A1), a first single frequency transfer platform SFR (A2) is agreed to use an F2 frequency point as a transmitting frequency point to transmit an SQ1 signaling in another time slot of a current frame after receiving the LC frame, the first single frequency transfer platform SFR (A2) is used for telling a second single frequency transfer platform SFR (B2) to receive the signal intensity of the first mobile station MS (A1) by itself, and after finishing transmitting the SQ1 signaling, the second single frequency transfer platform SFR is switched back to an F1 frequency point to continuously receive the frame of the first mobile station MS (A1);

after receiving the first frame sent by the first mobile station MS (a1), the second single frequency relay station SFR (B2) is agreed to use the F2 frequency point as the receiving frequency point waiting SQ1 signaling in another time slot of the current frame after receiving the LC frame, and switches back to the F1 frequency point at the end of the time slot to continue receiving the transmission frame of the first mobile station MS (a 1);

A2) after receiving the LC frame, the second single frequency relay station SFR (B2) is agreed to use the F2 frequency point as a transmitting frequency point to send SQ2 signaling in the second time slot of the next frame after receiving the LC frame, and the signaling is used for telling the first single frequency relay station SFR (A2) to receive the signal intensity of the first mobile station MS (A1);

comparing the strength of the mobile station signal in the SQ1 signaling and SQ2 signaling by the first single-frequency relay station SFR (a2), if SQ1 is less than or equal to SQ2, it indicates that the distance between the first mobile station MS (a1) and the second single-frequency relay station SFR (B2) is closer, and at this time, the first single-frequency relay station SFR (a2) will not watch on the F1 frequency point for receiving, but switch to the F2 frequency point for receiving the frame sent by the second single-frequency relay station SFR (B2) in one time slot and forward with the F3 frequency point in the other time slot; if SQ1 is greater than SQ2, it indicates that the first mobile station MS (a1) is closer to the first single frequency relay set SFR (a2), at which time the first single frequency relay set SFR (a2) will continue to watch on one timeslot for receiving the first mobile station MS (a1) with F1 frequency point and another timeslot for forwarding the frame of the first mobile station MS (a1) with F2 frequency point;

after a first single frequency transfer table SFR (A2) is agreed to receive an LC frame, an F2 frequency point is used as a receiving frequency point in the first time slot of the next frame after the LC frame is received, and an SQ2 signaling is received;

A3) if SQ1 is greater than SQ2, which means that the first mobile station MS (a1) is closer to the first single frequency relay station SFR (a2), then the first single frequency relay station SFR (a2) will continue to receive the first mobile station MS (a1) in one timeslot with F1 frequency point watch and another timeslot will forward the frame of the first mobile station MS (a1) in F2 frequency point;

the second single-frequency transfer table SFR (B2) does not wait at the F1 frequency point, but switches to the F2 frequency point in one time slot to wait and receive the frame sent by the first single-frequency transfer table SFR (A2) and forwards the frame with the F3 frequency point after the other time slot deviates for 90ms, and at the moment, the second single-frequency transfer table SFR (B2) receives the LC frame and forwards the LC frame with the deviation of 90 ms;

A4) the second single frequency relay station SFR (B2) can deviate by 90ms to forward the frame of the first single frequency relay station SFR (A2); when receiving, the second mobile station MS (B1) operates in the scanning mode, and sequentially cycles through the scan list members CH1/CH2/CH3 as the reception wait, and stays on the channel with the strongest signal strength, where the strongest signal strength received by the second mobile station MS (B1) is from the second single frequency relay station SFR (B2);

through the above steps a1) to a step a4), the frame transmitted by the first mobile station MS (a1) is forwarded through the first single frequency relay SFR (a2), and then forwarded through the second single frequency relay SFR (B2), and the second single frequency relay SFR (B2) can receive the frame of the first mobile station MS (a1), thereby implementing communication of two different networks.

3. The method of claim 1, wherein when the first mobile station MS (a1) initiates a voice call on frequency point F1, the first single frequency relay SFR (a2) scans for a wait and LC frames are received on both frequency points F1, and the second single frequency relay SFR (B2) scans for a wait and no LC frames are received, the method comprises the steps of:

B1) if the second single frequency relay SFR (B2) is appointed to not receive the LC frame sent by the first mobile station MS (A1) or the frame sent by the first single frequency relay SFR (A2), the frequency point scanning waiting with F1/F2/F3 is circulated in sequence;

B2) after receiving a first frame which is an LC frame transmitted by a first mobile station MS (A1), a first single frequency relay station SFR (A2) is agreed, and another time slot of a current frame after receiving the LC frame uses an F2 frequency point as a transmitting frequency point to transmit an SQ1 signaling to tell another single frequency relay station that the signal intensity of the first mobile station MS (A1) is received by the other single frequency relay station, and after the SQ1 signaling is transmitted, the first single frequency relay station SFR is switched back to the F1 frequency point to continuously receive the transmitting frame of the first mobile station MS (A1);

after receiving an SQ1 signaling sent by a first single frequency relay station SFR (A2), scanning and waiting by a second single frequency relay station SFR (B2), and agreeing that a first frame is an SQ1 signaling frame sent by a first single frequency relay station SFR (A2), the second single frequency relay station SFR (B2) considers that the distance between a first mobile station MS (A1) and the second single frequency relay station SFR (B2) of a sender is farther than the distance between the first mobile station MS (A1) and the first single frequency relay station SFR (A2);

B3) after receiving a SQ1 signaling frame sent by a first single frequency relay SFR (A2), a second single frequency relay SFR (B2) is agreed, after receiving the SQ1 signaling, a second time slot of a next frame uses an F2 frequency point as a transmitting frequency point to send an SQ2 signaling, and when the distance between a first mobile station MS (A1) and the second single frequency relay SFR (B2) is farther, the second single frequency relay SFR (B2) is switched to an F2 frequency point in one time slot to watch and receive the frame sent by the first single frequency relay SFR (A2) and transmit the frame by the F3 frequency point in the other time slot;

after receiving a first frame which is a frame transmitted by a first mobile station MS (A1), a first single frequency relay station SFR (A2) is agreed to receive SQ2 signaling by using an F2 frequency point as a receiving frequency point watch in a first time slot of a next frame after receiving an LC frame;

when the RSSI of SQ1 is greater than the RSSI of SQ2, then the distance between the first mobile station MS (a1) and the first single frequency relay SFR (a2) is closer than the distance between the first mobile station MS (a1) and the second single frequency relay SFR (B2), the first single frequency relay SFR (a2) will receive the frame of the first mobile station MS (a1) at frequency F1 in the first slot of the next frame, and start forwarding the frame of the first mobile station MS (a1) at the second slot of the next frame, and then continue to watch on the frame of the first mobile station MS (a1) at frequency F1 in one slot, and the other slot forwards the frame of the first mobile station MS (a1) at frequency F2;

B4) when the first mobile station MS (a1) is closer to the first single frequency relay station SFR (a2), the first single frequency relay station SFR (a2) will continue to watch for receiving the frames of the first mobile station MS (a1) in the F1 frequency point in one timeslot, and forward the frames of the first mobile station MS (a1) in the F2 frequency point in another timeslot;

the first mobile station MS (A1) is farther away from the second single-frequency transfer platform SFR (B2), the second single-frequency transfer platform SFR (B2) is switched to the F2 frequency point in one time slot to wait for receiving the frame sent by the first single-frequency transfer platform SFR (A2) and forwards the frame by shifting the F3 frequency point for 90MS in the other time slot, and the second single-frequency transfer platform SFR (B2) receives the LC frame and forwards the LC frame by shifting the LC frame for 90 MS;

B5) the second single frequency relay station SFR (B2) can deviate by 90ms to forward the frame of the first single frequency relay station SFR (A2); when receiving, the second mobile station MS (B1) operates in the scanning mode, and sequentially cycles through the scan list members CH1/CH2/CH3 as the reception wait, and stays on the channel with the strongest signal strength, where the strongest signal strength received by the second mobile station MS (B1) is from the second single frequency relay station SFR (B2); through the above steps B1) to B5), the frame transmitted by the first mobile station MS (a1) is forwarded through the first single frequency relay station SFR (a2), and then forwarded through the second single frequency relay station SFR (B2), and the second mobile station MS (B1) can receive the frame transmitted by the first mobile station MS (a1), thereby implementing communication of two different networks.

4. The method of claim 1, wherein when the first mobile station MS (a1) initiates a voice call on frequency point F1, the first single frequency relay SFR (a2) scans for waiting, no LC frames are received, the second single frequency relay SFR (B2) scans for waiting, and LC frames are received on frequency point F1, the method comprises the steps of:

C1) if the first single-frequency relay station SFR (A2) is appointed to the first single-frequency relay station SFR (A2), if the LC frame sent by the first mobile station MS (A1) or the frame sent by the second single-frequency relay station SFR (B2) is not received, the frequency point scanning waiting by F1/F2/F3 is sequentially circulated; whether the first single frequency relay SFR (A2) receives the A/B/C/D/E/F frame sent by the first mobile station MS (A1) or not at this time, the first single frequency relay SFR (A2) continues scanning;

after receiving the first frame sent by the first mobile station MS (a1), the second single frequency relay station SFR (B2) is agreed to use the F2 frequency point as the receiving frequency point waiting SQ1 signaling in another time slot of the current frame after receiving the LC frame, and switches back to the F1 frequency point at the end of the time slot to continue receiving the transmission frame of the first mobile station MS (a 1); when the second single frequency relay station SFR (B2) does not receive the signaling SQ1 sent by the first single frequency relay station SFR (A2), the first mobile station MS (A1) is considered to be closer to the second single frequency relay station SFR (B2), and the frame sent by the first mobile station MS (A1) is forwarded by starting at the frequency point F2 in the second time slot of the next frame;

C2) when the second single frequency relay SFR (B2) considers that the first mobile station MS (A1) is closer to the second single frequency relay SFR (B2), the second single frequency relay SFR (B2) starts to forward the frame transmitted by the first mobile station MS (A1) at the position with the F2 frequency point; after a first single frequency relay station SFR (A2) scans and waits for a frame transmitted by a second single frequency relay station SFR (B2), the frame transmitted by the second single frequency relay station SFR (B2) is received at the time slot by an F2 frequency point, and the frame of a first mobile station MS (A1) is forwarded at the F3 frequency point at the time offset by 90MS at the other time slot;

C3) the first single frequency relay station SFR (A2) shifts for 90MS to forward the frame sent by the second single frequency relay station SFR (B2), and when the second subscriber station MS (B1) receives the frame, the second subscriber station MS works in a scanning mode and scans and receives the frame sent by the first single frequency relay station SFR (A2); through the above steps C1) to C3), the frame transmitted by the first mobile station MS (a1) is forwarded by the second single frequency relay station SFR (B2), and then forwarded by the first single frequency relay station SFR (a2), and the second mobile station MS (B1) can receive the frame transmitted by the first mobile station MS (a1), thereby implementing communication of two different networks.