CN110177400B - Method for determining cascade networking of two single-frequency transfer platforms by mobile terminal - Google Patents
Method for determining cascade networking of two single-frequency transfer platforms by mobile terminal Download PDFInfo
- Publication number
- CN110177400B CN110177400B CN201910505576.6A CN201910505576A CN110177400B CN 110177400 B CN110177400 B CN 110177400B CN 201910505576 A CN201910505576 A CN 201910505576A CN 110177400 B CN110177400 B CN 110177400B
- Authority
- CN
- China
- Prior art keywords
- sfr
- frame
- seq
- relay station
- mobile station
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W40/00—Communication routing or communication path finding
- H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
- H04W40/12—Communication route or path selection, e.g. power-based or shortest path routing based on transmission quality or channel quality
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W40/00—Communication routing or communication path finding
- H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
- H04W40/20—Communication route or path selection, e.g. power-based or shortest path routing based on geographic position or location
-
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/02—Terminal devices
- H04W88/04—Terminal devices adapted for relaying to or from another terminal or user
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The invention provides a method for determining two single-frequency transfer platform cascade networking by a mobile terminal, wherein a first single-frequency transfer platform SFR and a second single-frequency transfer platform SFR continuously send N SEQ signaling at intervals of T in an idle state, and M SEQ signaling is continuously sent when the voice emission is finished; and the mobile station terminal MS receives SEQ signaling of the first single-frequency transfer platform SFR and the second single-frequency transfer platform SFR and detects the signal intensity in the SEQ signaling, wherein the SEQ signaling has the ID numbers of the first single-frequency transfer platform SFR and the second single-frequency transfer platform SFR which are transmitted in a downlink manner. The mobile terminal selects the single-frequency relay station closer to the mobile terminal to forward the service of the mobile terminal by comparing the signal strength in the received SEQ signaling of the single-frequency relay station, and the single-frequency relay station farther away from the mobile terminal is used for forwarding the service of the current closer single-frequency relay station, so that the two single-frequency relay stations can be cascaded to form a network and a topology network.
Description
Technical Field
The invention relates to the technical field of single-frequency transfer tables, in particular to a method for determining two single-frequency transfer table cascade networking by a mobile station terminal.
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. 7. 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 SFR single-frequency transfer platform is improved by a mobile terminal (vehicle-mounted platform) with much lower cost than the conventional transfer platform, and the main working principle 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 mobile station terminal 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 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. 8, 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 solve the above-mentioned shortcomings in the prior art, the present invention provides a method for determining two cascaded single frequency relay stations via a mobile station terminal, so as to overcome the shortcomings in the prior art.
In order to achieve the above object, the present invention provides a method for determining two single frequency relay station cascaded networks by a mobile station terminal, the method comprising: the first single-frequency transfer platform SFR and the second single-frequency transfer platform SFR can continuously send N SEQ signaling at intervals of T in an idle state, and can continuously send M SEQ signaling when the voice transmission is finished; a mobile station terminal MS receives SEQ signaling of a first single frequency transfer platform SFR and a second single frequency transfer platform SFR, wherein the SEQ signaling has ID numbers of the first single frequency transfer platform SFR and the second single frequency transfer platform SFR which are transmitted in a downlink manner; the mobile station terminal MS detects and compares signal intensity in SEQ signaling of a first single-frequency transfer platform SFR and a second single-frequency transfer platform SFR, selects a single-frequency transfer platform closer to the mobile station MS to forward own service according to the signal intensity, and selects a single-frequency transfer platform farther from the mobile station MS to forward the service of the current closer single-frequency transfer platform, so as to realize cascade networking of the first single-frequency transfer platform SFR and the second single-frequency transfer platform SFR.
As a further description of the method of the present invention, preferably, the dynamic channel lists of the first single frequency relay station SFR and the second single frequency relay station SFR both have a channel CH1 and a channel CH2, and the receiving frequency point of the channel CH1 is set to be F1, the transmitting frequency point is F2, the receiving frequency point of the channel CH2 is set to be F2, and the transmitting frequency point is F3; the dynamic channel list of the mobile station terminal MS is provided with a channel DCH1 and a channel DCH2, and the receiving frequency point of the channel DCH1 is set to be F2, the transmitting frequency point is F1, the receiving frequency point of the channel DCH2 is F3, and the transmitting frequency point is F2; one single frequency relay platform of the first single frequency relay platform SFR and the second single frequency relay platform SFR uses the channel CH1 to forward the frame of the mobile station terminal MS, the other single frequency relay platform uses the channel CH2 to forward the frame of the previous single frequency relay platform, and the mobile station terminal MS initiates the service and needs to be switched to the DCH1 for proceeding.
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 operate in a dynamic scanning mode and continuously poll and switch to the channel CH1 and the channel CH2, respectively, wherein the first single frequency relay station SFR suspends dynamic scanning and specifies that SEQ signaling is transmitted on the channel CH1 when transmitting N SEQ signaling at an interval T time, the second single frequency relay station SFR suspends dynamic scanning and specifies that SEQ signaling is transmitted on the channel CH2 when transmitting N SEQ signaling at an interval T time, and the first single frequency relay station SFR and the second single frequency relay station SFR continue dynamic scanning after transmitting SEQ signaling; the first single frequency relay station SFR and the second single frequency relay station SFR suspend dynamic scanning when receiving a frame or forwarding a frame service, and do not continue dynamic scanning until the reception or forwarding of the service is finished.
As a further description of the method of the present invention, preferably, the mobile station terminal MS operates in the dynamic scanning mode, and when the mobile station terminal MS wants to initiate a call service, the dynamic scanning is suspended and specified to be performed on the channel DCH1, and the dynamic scanning is continued after the call service is initiated; when the mobile station terminal MS receives the frame, the dynamic scanning is suspended, and the dynamic scanning is not continued until the service receiving is finished.
As a further description of the method of the present invention, preferably, the first single frequency relay station SFR enters dynamic scanning after being powered on, and transmits N frames of SEQ signaling in CH1 at an interval of T seconds in an idle state, so that the mobile station terminal MS receives the SEQ signaling and can know which single frequency relay station is closer to itself; the first single frequency transfer platform SFR can pause the dynamic scanning in the process of sending the SEQ signaling, and continues to enter the dynamic scanning after the SEQ signaling is sent; when a first single frequency relay station SFR receives a frame, dynamic scanning is suspended, then whether the frame is an LC frame is judged, if the frame is an LC frame and the content FLCO is equal to 0b1111, and when the content SFR ID is equal to the current single frequency relay station ID, the frame transmitted by a mobile station terminal MS is forwarded by 90MS offset of the current first single frequency relay station SFR in a CH1 channel, and when the content SFR ID is not equal to the current single frequency relay station ID, the frame transmitted by the mobile station terminal MS is not forwarded by the current first single frequency relay station SFR, but is switched to CH2 to wait for receiving and is forwarded by 90MS offset of another single frequency relay station, and frames in other situations are directly forwarded by 90MS offset; when the voice frame is forwarded to the end, the first single frequency transfer table SFR can continuously transmit the SEQ signaling of the M frame, and the dynamic scanning is continuously carried out after the SEQ signaling is sent out.
As a further description of the method of the present invention, preferably, the second single frequency relay station SFR enters dynamic scanning after being powered on, and transmits N frames of SEQ signaling in CH2 at an interval of T seconds in an idle state, so that the mobile station terminal MS receives the SEQ signaling and can know which single frequency relay station is closer to itself; the second single frequency transfer platform SFR can pause the dynamic scanning in the process of sending the SEQ signaling, and continues to enter the dynamic scanning after the SEQ signaling is sent; when the second single frequency relay station SFR receives a frame, the dynamic scanning is suspended, then whether the frame is an LC frame is judged, if the frame is an LC frame and the content FLCO is equal to 0b1111, and when the content SFR ID is equal to the ID of the current single frequency relay station, the second single frequency relay station SFR is explained to deviate for 90MS at a CH1 channel to forward the frame sent by the mobile station terminal MS, and when the content SFR ID is not equal to the ID of the current single frequency relay station, the second single frequency relay station SFR is explained not to forward the frame sent by the mobile station terminal MS, but is switched to CH2 to wait for receiving and deviate for 90MS to forward the frame sent by another single frequency relay station; frames in other cases are directly forwarded with an offset of 90 ms; when the voice frame is forwarded to the end, the second single frequency transfer table SFR can continuously transmit the SEQ signaling of the M frame, and the dynamic scanning is continuously carried out after the SEQ signaling is sent out.
As a further description of the method described in the present invention, preferably, the mobile station terminal MS works in dynamic scanning, the mobile station terminal MS scans the SEQ frame and suspends the dynamic scanning, and if the received signal strength of the SEQ frame is stronger than the signal strength of the SEQ frame received before, the single frequency relay table Address SFR Address of the SEQ frame and the signal strength when receiving the SEQ frame are stored and backed up for use when initiating the transmission service, and the mobile station MS continues to enter the dynamic scanning after the reception flow is completed; when the mobile station terminal MS has a service to be transmitted, the mobile station terminal MS firstly suspends dynamic scanning and assembles a special LC frame, fills the single-frequency relay station ID with the strongest downlink signal strength into the SFR ID, assigns the value of the FLCO to 0b1111, alternately performs the special LC frame and the conventional LC frame of which the value of the FLCO is not 0b1111 during transmission, then switches to a DCH1 channel to initiate a calling service, and continuously enters the dynamic scanning after the calling service is finished; the mobile station terminal MS selects a single-frequency transfer platform closer to the mobile station terminal MS to forward own services by comparing the received signal strength of the SEQ, and the single-frequency transfer platform farther from the mobile station MS is used for forwarding the services of the current closer single-frequency transfer platform, so that two single-frequency transfer platforms can be cascaded to form a network and a topology network.
The invention has the following beneficial effects: in the invention, the mobile terminal selects the single-frequency transfer platform closer to the mobile terminal to forward the service of the mobile terminal by comparing the signal strength in the received SEQ signaling of the single-frequency transfer platform, and the single-frequency transfer platform farther away from the mobile terminal is used for forwarding the service of the current closer single-frequency transfer platform, so that two single-frequency transfer platforms can be cascaded to form a network and a topology network.
Drawings
FIG. 1 is a networking diagram of a mobile terminal and two single-frequency relay stations according to the present invention;
fig. 2 is a working schematic diagram of a first single frequency relay station SFR of the present invention;
fig. 3 is a working schematic diagram of a second single frequency relay station SFR of the present invention;
FIG. 4 is a schematic diagram of the operation of the mobile station MS of the present invention;
FIG. 5 is a diagram illustrating a first case where the transmission of the mobile station terminal is forwarded through the cascade of two single-frequency relay stations according to the present invention;
FIG. 6 is a diagram illustrating a second case where the transmission of the mobile station terminal of the present invention is forwarded through the cascade of two single-frequency relay stations;
FIG. 7 is a diagram illustrating an aligned channel pattern in the prior art;
fig. 8 is a schematic diagram of 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 network diagram of a mobile terminal and two single-frequency relay stations according to the present invention; a method for determining two single-frequency relay station cascade networking by a mobile terminal is to determine the networking of two single-frequency relay stations by the terminal. The first single frequency relay station SFRA and the second single frequency relay station SFRB continuously send N SEQ signaling (the definition of SEQ signaling is shown in table 1) at an interval of T in the idle state, and also continuously send M SEQ signaling when the transmission of speech is finished, and all mobile station terminals MS can know which single frequency relay station the mobile station terminal is closer to by receiving SEQ (the SEQ fills in the downlink transmitted single frequency relay station ID number) and detecting the signal strength of SEQ. Therefore, when the mobile terminal initiates the voice service, the single-frequency transfer platform closer to the mobile terminal can be selected to forward the service of the terminal, and the farther single-frequency transfer platform can be selected to forward the service of the other single-frequency transfer platform, so that the cascade networking of the two single-frequency transfer platforms is realized.
TABLE 1 SEQ content
The specific implementation process is as follows:
the dynamic channel lists of the first single-frequency transfer platform SFRA and the second single-frequency transfer platform SFRB both have a channel CH1 and a channel CH2, the receiving frequency point of the channel CH1 is set to be F1, the transmitting frequency point is set to be F2, the receiving frequency point of the channel CH2 is set to be F2, and the transmitting frequency point is set to be F3; the dynamic channel list of the mobile station terminal MS has a channel DCH1 and a channel DCH2, and sets a receiving frequency point of a channel DCH1 to be F2, a transmitting frequency point to be F1, a receiving frequency point of a channel DCH2 to be F3, and a transmitting frequency point to be F2. Thus, the method comprises: the first single-frequency transfer platform SFRA uses a channel CH1 to forward a frame of the mobile station terminal MS, the second single-frequency transfer platform SFRB uses a channel CH2 to forward the frame of the first single-frequency transfer platform SFRA, and the mobile station terminal MS initiates a service to be switched to a channel DCH1 to realize the cascade networking of the first single-frequency transfer platform SFRA and the second single-frequency transfer platform SFRB.
Setting a first single frequency transfer platform SFRA and a second single frequency transfer platform SFRB to work in a dynamic scanning mode by default, namely, switching to a channel CH1 and a channel CH2 in a non-stop polling mode respectively, wherein the first single frequency transfer platform SFRA stops dynamic scanning and provides for transmitting SEQ signaling on a channel CH1 when transmitting N SEQ signaling at intervals of T time, the second single frequency transfer platform SFRB stops dynamic scanning and provides for transmitting SEQ signaling on a channel CH2 when transmitting N SEQ signaling at intervals of T time, and the first single frequency transfer platform SFRA and the second single frequency transfer platform SFRB continue dynamic scanning after finishing transmitting the SEQ signaling. The first single frequency relay station SFRA and the second single frequency relay station SFRB suspend dynamic scanning when receiving a frame or forwarding a frame service, and do not continue dynamic scanning until the reception or forwarding of the frame service is finished.
Setting the default work of the mobile station terminal MS in a dynamic scanning mode, suspending dynamic scanning when the mobile station terminal MS needs to initiate a calling service and specifying that the dynamic scanning is carried out on a channel DCH1, and continuing the dynamic scanning after the calling service is initiated; when the mobile station terminal MS receives the frame, the dynamic scanning is suspended, and the dynamic scanning is not continued until the service receiving is finished.
Setting N to be greater than or equal to 1, M to be greater than or equal to 1, and T to be greater than or equal to 1 second
Referring to fig. 2, fig. 2 is a schematic diagram of a first single frequency relay station SFR according to the present invention; the method comprises the steps that a first single frequency relay station SFRA enters dynamic scanning after being started, and N-frame SEQ signaling is transmitted in a CH1 channel at an interval of T seconds in an idle state (not in a state of transmitting service or receiving frame service), so that a mobile station terminal MS receives the SEQ signaling and can know which single frequency relay station is closer to the mobile station MS; the first single frequency transfer platform SFRA suspends the dynamic scanning in the process of sending the SEQ signaling, and continues to enter the dynamic scanning after sending the SEQ signaling; when a first single frequency relay station SFRA receives a frame, dynamic scanning is suspended, whether the frame is an LC frame is judged, if the frame is an LC frame and the content FLCO is equal to 0b1111, and when the content SFRID is equal to the current single frequency relay station ID, the frame transmitted by a mobile station terminal MS is forwarded by the fact that the current first single frequency relay station SFRA deviates 90MS at a CH1 channel, and when the content SFR ID is not equal to the current single frequency relay station ID, the frame transmitted by the mobile station terminal MS is not forwarded by the fact that the current first single frequency relay station SFRA switches to CH2 to wait for receiving and deviates 90MS to forward the frame transmitted by another single frequency relay station, and the frames in other cases are directly deviated 90MS to forward; when the voice frame is forwarded, the first single frequency relay station SFRA will continue to transmit the SEQ signaling of the M frame, and continue to enter dynamic scanning after the SEQ signaling is transmitted.
Referring to fig. 3, fig. 3 is a schematic diagram of a second single frequency relay station SFR according to the present invention; the second single frequency relay station SFRB enters dynamic scanning after being started, and N-frame SEQ signaling is transmitted in a CH2 channel at an interval of T seconds in an idle state (not in a state of transmitting service or receiving frame service), so that the mobile station terminal MS receives the SEQ signaling and can know which single frequency relay station is closer to the mobile station MS; the second single frequency transfer platform SFRB suspends the dynamic scanning in the process of sending the SEQ signaling, and continues to enter the dynamic scanning after sending the SEQ signaling; when the second single frequency relay station SFRB receives a frame, the dynamic scanning is suspended, then whether the frame is an LC frame or not is judged, if the frame is an LC frame and the content FLCO is equal to 0b1111, and when the content SFRID is equal to the ID of the current single frequency relay station, the second single frequency relay station SFRB is explained to deviate for 90MS at a CH1 channel to forward the frame sent by the mobile station terminal MS, and when the content SFR ID is not equal to the ID of the current single frequency relay station, the second single frequency relay station SFRB is explained not to forward the frame sent by the mobile station terminal MS, but is switched to CH2 to wait for receiving and deviate for 90MS to forward the frame sent by another single frequency relay station; frames in other cases are directly forwarded with an offset of 90 ms; and when the voice frame is forwarded to the end, the second single frequency transfer platform SFRB continuously transmits the SEQ signaling of the M frame, and continuously enters dynamic scanning after the SEQ signaling is transmitted.
Referring to fig. 4, fig. 4 is a schematic diagram of the mobile station MS according to the present invention; the mobile station terminal MS works in dynamic scanning, the mobile station terminal MS can scan the SEQ frame and suspend dynamic scanning, if the signal intensity of the received SEQ frame is stronger than that of the previously received SEQ frame, the single-frequency transfer platform Address SFR Address of the content of the SEQ frame and the signal intensity when the SEQ is received are stored and backed up so as to be used when a transmitting service is initiated, and the mobile station terminal MS continues to enter the dynamic scanning after the receiving process is completed; when the mobile station terminal MS has a service to transmit, the mobile station terminal MS first suspends dynamic scanning and assembles a special LC frame (the definition of the special LC frame is as in table 2), fills the single frequency relay station ID with the strongest downlink signal strength in the SFR ID, assigns the FLCO value to 0b1111, alternately performs the special LC frame and the conventional LC frame whose FLCO value is not 0b1111 at the time of transmission, then switches to the DCH1 channel to initiate a call service, and then continuously enters dynamic scanning after the call service is finished.
The significance of the special LC frame is that the mobile station terminal MS selects a single-frequency relay station closer to the mobile station terminal MS to forward own service by comparing the received signal strength of the SEQ, and the single-frequency relay station farther away from the mobile station terminal MS is used for forwarding the service of the current closer single-frequency relay station, so that two single-frequency relay stations can be cascaded to form a network and a topology network.
TABLE 2 Special LC PDU content
As can be seen from the above, to implement the cascaded networking of two single frequency relay stations requires one of the single frequency relay stations to use CH1 to forward the frames of the MS, and the other single frequency relay station to use CH2 to forward the frames of the other single frequency relay station. Two application scenarios are exemplified below:
scenario one, fig. 5 illustrates an application scenario where the mobile station MS a is close to SFR a and MS B is closer to SFR B. The mobile station MS A initiates a calling service on a DCH1 channel, a special LC and a normal LC of the MS A are alternated (such as '1' in figure 5), and the special LC of the MS A is used for selecting an SFR A to forward a frame of the MS A; the SFR a, upon receiving the special LC and parsing, knows to forward the MS a frame (e.g., "2" of fig. 5) by SFR a itself at CH1 channel offset by 90 MS; SFR B knows to forward SFR a frame at channel CH2 channel offset 90ms after receiving the special LC frame (e.g., "3" of fig. 5); MS B receives the frame from SFR B. Therefore, the MS A initiates a call service, after the call service is relayed by the SFR A, the call service initiated by the MS A is received by the MS B close to the SFR B through the SFR B cascade relay station, and thus, the network cascade and the network topology of the two single-frequency relay stations are realized.
Scenario two, fig. 6 illustrates an application scenario where the mobile station MS a is close to SFR B and MS B is closer to SFR a. The mobile station MS A initiates a calling service on a DCH1 channel, a special LC and a normal LC of the MS A are alternated (as shown in '1' of figure 6), and the special LC of the MS A is used for selecting an SFR B to forward a frame of the MS A; SFR B knows after receiving the special LC and parsing that MS a's frame is forwarded by SFR B itself 90MS offset in CH1 channel ("2" in fig. 6); after receiving the special LC frame, SFR a knows to forward the frame of SFR B at channel CH2 channel offset by 90ms (e.g., "3" in fig. 6); MS B receives the frame from SFR a. Therefore, the MS A initiates a call service, after being transferred by the SFR B, the call service initiated by the MS A is received by the SFR B close to the SFR A through the SFR A cascade transfer platform, and thus, the network cascade and the network topology of the two single-frequency transfer platforms are realized.
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 (5)
1. A method for determining two single frequency relay station cascaded networks by a mobile terminal, the method comprising:
the first single frequency relay station SFR (A) and the second single frequency relay station SFR (B) can continuously send N SEQ signaling at intervals of T in an idle state, and can continuously send M SEQ signaling when the voice transmission is finished;
a mobile station terminal MS receives SEQ signaling of a first single frequency transfer platform SFR (A) and a second single frequency transfer platform SFR (B), wherein the SEQ signaling has ID numbers of the first single frequency transfer platform SFR (A) and the second single frequency transfer platform SFR (B) which are transmitted in a downlink manner;
the mobile station terminal MS detects and compares the signal intensity in the SEQ signaling of a first single-frequency transfer platform SFR (A) and a second single-frequency transfer platform SFR (B), selects a single-frequency transfer platform closer to the mobile station MS to forward own service according to the signal intensity, and selects a single-frequency transfer platform farther from the mobile station MS to forward the service of the current closer single-frequency transfer platform, so as to realize the cascade networking of the first single-frequency transfer platform SFR (A) and the second single-frequency transfer platform SFR (B);
the dynamic channel lists of the first single-frequency transfer platform SFR (A) and the second single-frequency transfer platform SFR (B) both have a channel CH1 and a channel CH2, the receiving frequency point of the channel CH1 is set to be F1, the transmitting frequency point is set to be F2, the receiving frequency point of the channel CH2 is set to be F2, and the transmitting frequency point is set to be F3; the dynamic channel list of the mobile station terminal MS is provided with a channel DCH1 and a channel DCH2, and the receiving frequency point of the channel DCH1 is set to be F2, the transmitting frequency point is F1, the receiving frequency point of the channel DCH2 is F3, and the transmitting frequency point is F2; one single-frequency transfer platform of the first single-frequency transfer platform sfr (a) and the second single-frequency transfer platform sfr (b) uses the channel CH1 to forward the frame of the mobile station terminal MS, the other single-frequency transfer platform uses the channel CH2 to forward the frame of the previous single-frequency transfer platform, and the mobile station terminal MS initiates a service and needs to be switched to the DCH 1;
the mobile station terminal MS works in dynamic scanning, the mobile station terminal MS can scan the SEQ frame and suspend dynamic scanning, if the signal intensity of the received SEQ frame is stronger than that of the previously received SEQ frame, the single-frequency transfer platform Address SFR Address of the content of the SEQ frame and the signal intensity when the SEQ is received are stored and backed up so as to be used when a transmitting service is initiated, and the mobile station terminal MS continues to enter the dynamic scanning after the receiving process is completed; when the mobile station terminal MS has a service to be transmitted, the mobile station terminal MS firstly suspends dynamic scanning and assembles a special LC frame, fills the single-frequency relay station ID with the strongest downlink signal strength in SFRID, assigns the value of FLCO to 0b1111, alternately carries out the special LC frame and the conventional LC frame of which the value of FLCO is not 0b1111 during transmission, then switches to a DCH1 channel to initiate a calling service, and continues to enter the dynamic scanning after the calling service is ended; the mobile station terminal MS selects a single-frequency relay station closer to the mobile station terminal MS to forward own services by comparing the received signal strength of the SEQ, and the single-frequency relay station farther away from the mobile station MS is used for forwarding the services of the current closer single-frequency relay station, so that two single-frequency relay stations can be cascaded to form a network.
2. The method of claim 1, wherein a first single frequency relay stage sfr (a) and a second single frequency relay stage sfr (b) operate in a dynamic scanning mode and constantly poll for switching to channel CH1 and channel CH2, respectively, wherein the first single frequency relay stage sfr (a) suspends dynamic scanning and provides for transmission of SEQ signaling on channel CH1 when N SEQ signaling is transmitted at intervals of T time, the second single frequency relay stage sfr (b) suspends dynamic scanning and provides for transmission of SEQ signaling on channel CH2 when N SEQ signaling is transmitted at intervals of T time, the first single frequency relay stage sfr (a) and the second single frequency relay stage sfr (b) continue dynamic scanning after transmission of SEQ signaling; the first single frequency relay station sfr (a) and the second single frequency relay station sfr (b) suspend dynamic scanning when receiving a frame or forwarding frame traffic, and do not continue dynamic scanning until the end of receiving or forwarding traffic.
3. The method according to claim 1, wherein the mobile station MS operates in a dynamic scanning mode, wherein the dynamic scanning is suspended and scheduled to be performed on the DCH1 when the mobile station MS wants to initiate a call service, and the dynamic scanning is continued after the call service is initiated; when the mobile station terminal MS receives the frame, the dynamic scanning is suspended, and the dynamic scanning is not continued until the service receiving is finished.
4. The method of claim 1, wherein the first single frequency relay station sfr (a) enters dynamic scanning after being powered on, and transmits N frames of SEQ signaling in CH1 at intervals of T seconds in an idle state, so that the mobile station terminal MS receives the SEQ signaling and can know which single frequency relay station is closer to itself;
a first single frequency transfer table SFR (A) suspends the dynamic scanning in the process of sending the SEQ signaling, and continues to enter the dynamic scanning after the SEQ signaling is sent;
when a frame is received, a first single frequency relay station SFR (A) suspends dynamic scanning, then judges whether the frame is an LC frame, if the frame is an LC frame and the content FLCO is equal to 0b1111, and when the content SFR ID is equal to the current single frequency relay station ID, the current first single frequency relay station SFR (A) forwards the frame sent by the mobile station terminal MS by deviating 90MS at a CH1 channel, and when the content SFR ID is not equal to the current single frequency relay station ID, the current first single frequency relay station SFR (A) does not forward the frame sent by the mobile station terminal MS, but switches to CH2 to watch for receiving and forwards the frame sent by another single frequency relay station by deviating 90MS, and the frames in other cases are directly forwarded by deviating 90 MS; when the voice frame is forwarded to the end, the first single frequency relay station sfr (a) will continue to transmit the SEQ signaling of the M frame, and continue to enter dynamic scanning after the SEQ signaling is transmitted.
5. The method of claim 1, wherein the second single frequency relay station sfr (b) enters dynamic scanning after being powered on, and transmits N frames of SEQ signaling in CH2 at intervals of T seconds in an idle state, so that the mobile station terminal MS receives the SEQ signaling and can know which single frequency relay station is closer to itself;
a second single frequency transfer table SFR (B) suspends the dynamic scanning in the process of sending the SEQ signaling, and continues to enter the dynamic scanning after the SEQ signaling is sent;
the second single frequency relay station SFR (b) suspends the dynamic scanning when receiving the frame, then determines whether the frame is an LC frame, if it is an LC frame and the content FLCO is equal to 0b1111, and when the content SFR ID is equal to the ID of the current single frequency relay station, it indicates that the second single frequency relay station SFR (b) forwards the frame sent by the mobile station terminal MS by shifting 90MS on the CH1 channel, and when the content SFR ID is not equal to the ID of the current single frequency relay station, it indicates that the second single frequency relay station SFR (b) does not forward the frame sent by the mobile station terminal MS, but switches to CH2 to watch for receiving and shifts 90MS to forward the frame sent by another single frequency relay station; frames in other cases are directly forwarded with an offset of 90 ms; when the voice frame is forwarded to the end, the second single frequency relay station sfr (b) will continue to transmit the SEQ signaling of the M frame, and continue to enter dynamic scanning after the SEQ signaling is transmitted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910505576.6A CN110177400B (en) | 2019-06-12 | 2019-06-12 | Method for determining cascade networking of two single-frequency transfer platforms by mobile terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910505576.6A CN110177400B (en) | 2019-06-12 | 2019-06-12 | Method for determining cascade networking of two single-frequency transfer platforms by mobile terminal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110177400A CN110177400A (en) | 2019-08-27 |
| CN110177400B true CN110177400B (en) | 2022-06-07 |
Family
ID=67698218
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910505576.6A Active CN110177400B (en) | 2019-06-12 | 2019-06-12 | Method for determining cascade networking of two single-frequency transfer platforms by mobile terminal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110177400B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114143726B (en) * | 2021-12-01 | 2023-05-12 | 东方通信股份有限公司 | Method for realizing PDT direct forwarding networking |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104243010A (en) * | 2014-09-22 | 2014-12-24 | 哈尔滨海能达科技有限公司 | Relay station wireless-connected method and system and relay stations |
| CN104581651A (en) * | 2014-03-26 | 2015-04-29 | 海能达通信股份有限公司 | Terminal, trunk system and station positioning method of trunk system |
| CN105188105A (en) * | 2015-08-14 | 2015-12-23 | 广州维德科技有限公司 | Same-frequency relay emergency system and network communication path selection method thereof |
| CN106792964A (en) * | 2016-12-15 | 2017-05-31 | 陕西烽火实业有限公司 | A kind of DMR systems cascade method of calling |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101689919B (en) * | 2008-09-28 | 2013-05-01 | 海能达通信股份有限公司 | Method for implementing digital mobile radio private network communication, digital mobile radio private network communication terminal, relay station and system |
-
2019
- 2019-06-12 CN CN201910505576.6A patent/CN110177400B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104581651A (en) * | 2014-03-26 | 2015-04-29 | 海能达通信股份有限公司 | Terminal, trunk system and station positioning method of trunk system |
| CN104243010A (en) * | 2014-09-22 | 2014-12-24 | 哈尔滨海能达科技有限公司 | Relay station wireless-connected method and system and relay stations |
| CN105188105A (en) * | 2015-08-14 | 2015-12-23 | 广州维德科技有限公司 | Same-frequency relay emergency system and network communication path selection method thereof |
| CN106792964A (en) * | 2016-12-15 | 2017-05-31 | 陕西烽火实业有限公司 | A kind of DMR systems cascade method of calling |
Non-Patent Citations (1)
| Title |
|---|
| 基于DMR协议的数字对讲机中转模式设计;施金更等;《单片机与嵌入式系统应用》;20130501(第05期);全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110177400A (en) | 2019-08-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR950011076B1 (en) | Mobile radio communication system having mobile base and portable devices as a mobile station | |
| US7570948B2 (en) | Mobile station and base station | |
| JP3093243B2 (en) | Mobile radio communication system | |
| FI79768C (en) | Cellular radiotelephone system, method for transmitting data message and base station | |
| CN107864412B (en) | Multi-hop long-distance communication method and system for narrow-band intercom terminal | |
| FI108763B (en) | Method, mobile telephony system and mobile station for making a telephone connection | |
| KR20000049246A (en) | Dual mode symmetric/asymmetric communication control system | |
| EP1180312A1 (en) | Systems and methods for providing push to talk feature for wireless communication systems | |
| JPH0472831A (en) | Radio communication system | |
| CN111935653A (en) | Ad hoc network wireless intercom system and communication method | |
| CN110012544B (en) | Communication method in time division multiple access mode | |
| CN110177400B (en) | Method for determining cascade networking of two single-frequency transfer platforms by mobile terminal | |
| CN110233631B (en) | Method for supporting quick automatic networking of two single-frequency transfer platforms | |
| US6801754B2 (en) | Intelligent repeater and method to provide increased signaling | |
| JP3401255B2 (en) | Communication control method for digital TDMA wireless system | |
| JPH02274131A (en) | Transmission control system for mobile radio communication system | |
| EP1330929B1 (en) | Communication unit that communicates either directly or via an intermediate node and corresponding method | |
| JP3226751B2 (en) | Mobile communication system | |
| JP2003264871A (en) | Mobile communication system | |
| JPH0472830A (en) | Radio communication system | |
| JP3625413B2 (en) | Repeater | |
| JP2848108B2 (en) | Mobile satellite communication system | |
| JP2001285932A (en) | Radio communication system, communication channel setup method, radio terminal and radio repeater | |
| JPH1065608A (en) | Portable telephone system | |
| JPH0352340A (en) | Mobile object communication system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |