CN110177400A - A method of determining two single-frequency intermediate station cascade networks by hand platform terminal - Google Patents
A method of determining two single-frequency intermediate station cascade networks by hand platform terminal Download PDFInfo
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- CN110177400A CN110177400A CN201910505576.6A CN201910505576A CN110177400A CN 110177400 A CN110177400 A CN 110177400A CN 201910505576 A CN201910505576 A CN 201910505576A CN 110177400 A CN110177400 A CN 110177400A
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- 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
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- 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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/18—Self-organising networks, e.g. ad-hoc networks or sensor networks
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- 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
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- H04W88/04—Terminal devices adapted for relaying to or from another terminal or user
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Abstract
The method that the present invention provides a kind of to be determined two single-frequency intermediate station cascade networks by hand platform terminal, wherein, first single-frequency intermediate station SFR and the second single-frequency intermediate station SFR is spaced the time of T in an idle state to continuously transmit N number of SEQ signaling, and M SEQ signaling is continuously transmitted at the end of emitting voice；Hand platform terminal MS receives the SEQ signaling of the first single-frequency intermediate station SFR and the second single-frequency intermediate station SFR, and detects the signal strength in SEQ signaling, the ID number of the first single-frequency intermediate station SFR and the second single-frequency intermediate station SFR in the SEQ signaling with downlink.The business that hand platform terminal selects the single-frequency intermediate station closer from oneself by comparing the signal strength in the SEQ signaling of single-frequency intermediate station received to forward oneself in the present invention, from the business that oneself farther single-frequency intermediate station is used to forward current closer single-frequency intermediate station, to make two single-frequency intermediate stations can be with cascade network, topological network.
Description
Technical field
The present invention relates to single-frequency intermediate station technical fields, specifically, being related to one kind is determined two lists by hand platform terminal
The method of frequency intermediate station cascade network.
Background technique
In DMR (Digital Mobile Radio, digital mobile radio)/PDT (Professional Digital
Trunking, Digital Clustering) in digital mobile communication system, use TDMA (the Time division of two time slots
Multiple access, time division multiple acess) mode.It is illustrated in figure 7 alignment channelling mode.There are two time slots to form for one frame, often
A time slot is 30 milliseconds.One voice superframes is made of A, B, C, D, E and F frame, and 360 milliseconds in total.
SFR single-frequency intermediate station was improved by the hand platform terminal (Vehicle mounted station) more much lower than the cost of conventional intermediate station
Coming, main operational principle is the work of SFR single-frequency intermediate station under direct mode operation, and time slot is used to receive, in addition one
A time slot is used to emit.Therefore, other hand platform terminals carry out talk business, SFR single-frequency transfer under this direct channel
Platform is used to receive this talk business with a time slot, then forwards this business in another time slot, which adds calls
Distance, while decreasing the investment of user cost, and SFR single-frequency intermediate station is relatively gently also convenient for carrying due to weight.
As shown in figure 8, the voice service of single-frequency intermediate station forwarding MS, receives data in a time slot of a frame, in next frame
Another time slot forwards, and deviates 90 milliseconds, wherein voice service a superframe is made of A, B, C, D, E, F frame.
Certain emergency burst scene in, as fire-fighting emergent, underground (tunnel) accident rescue, petrochemical industry explosion rescue,
Geology disaster assistance etc. needs a kind of Emergency seismograph network establishment scheme to realize the topology of network.
Summary of the invention
In place of solving above-mentioned the deficiencies in the prior art, the purpose of the present invention is to provide one kind by hand platform terminal Lai really
The method of fixed two single-frequency intermediate station cascade networks, to overcome defect in the prior art.
To achieve the goals above, the present invention provides one kind, and two single-frequency intermediate station cascaded series are determined by hand platform terminal
The method of net, which comprises between the first single-frequency intermediate station SFR and the second single-frequency intermediate station SFR understands in an idle state
N number of SEQ signaling is continuously transmitted every the time of T, can continuously transmit M SEQ signaling at the end of emitting voice；Hand platform terminal MS
The SEQ signaling of the first single-frequency intermediate station SFR and the second single-frequency intermediate station SFR are received, there is downlink in the SEQ signaling
The ID number of first single-frequency intermediate station SFR and the second single-frequency intermediate station SFR；The first single-frequency intermediate station of the detection of hand platform terminal MS and comparison
Signal strength in the SEQ signaling of SFR and the second single-frequency intermediate station SFR, and selected apart from oneself more according to the signal strength
Close single-frequency intermediate station forwards oneself business, is used to forward current closer single-frequency transfer from oneself farther single-frequency intermediate station
The business of platform, to realize the cascade network of the first single-frequency intermediate station SFR and the second single-frequency intermediate station SFR.
As the further explanation to method of the present invention, it is preferable that the first single-frequency intermediate station SFR and the second single-frequency
Channel CH1 and channel CH2 are all had in the dynamic channel list of intermediate station SFR, and sets the reception frequency point of channel CH1 as F1,
Launching frequency is F2, sets the reception frequency point of channel CH2 as F2, launching frequency F3；The dynamic channel list of hand platform terminal MS
In there is channel DCH1 and channel DCH2, and set the reception frequency point of channel DCH1 as F2, launching frequency F1, channel DCH2's
Reception frequency point is F3, launching frequency F2；Wherein, a list in the first single-frequency intermediate station SFR and the second single-frequency intermediate station SFR
Frequency intermediate station forwards the frame of hand platform terminal MS using channel CH1, another single-frequency intermediate station is forwarded previous using channel CH2
The frame of single-frequency intermediate station, and hand platform terminal MS initiation business need to be switched on DCH1 and carry out.
As the further explanation to method of the present invention, it is preferable that the first single-frequency intermediate station SFR and the second single-frequency
Ceaselessly poll is switched to channel CH1 and channel CH2 in dynamic scan mode and respectively for intermediate station SFR work, wherein first is single
Frequency intermediate station SFR can suspend dynamic scan when being spaced T time and emitting N number of SEQ signaling and provide to emit SEQ on channel CH1
Signaling, the second single-frequency intermediate station SFR can suspend dynamic scan when being spaced T time and emitting N number of SEQ signaling and provide in channel
Emit SEQ signaling on CH2, the first single-frequency intermediate station SFR and the second single-frequency intermediate station SFR will continue to move after distributing SEQ signaling
State scanning；First single-frequency intermediate station SFR and the second single-frequency intermediate station SFR can be temporary when receiving frame or forwarding frame business
Stop dynamic scan, just continues dynamic scan after reception or forwarding service.
As the further explanation to method of the present invention, it is preferable that hand platform terminal MS works in dynamic scan mould
Formula can suspend dynamic scan when hand platform terminal MS will initiate call business and provide to carry out on channel DCH1, distribute calling
It will continue to dynamic scan after business；Dynamic scan can be suspended when hand platform terminal MS receives frame, after receiving service ending
Continue dynamic scan.
As the further explanation to method of the present invention, it is preferable that enter after the first single-frequency intermediate station SFR booting
Dynamic scan, can be spaced in an idle state T seconds time CH1 channel go transmitting N frame SEQ signaling so that hand platform terminal MS connects
It receives SEQ signaling and is able to know which single-frequency intermediate station is closer apart from oneself；First single-frequency intermediate station SFR is sending SEQ signaling
Dynamic scan can be suspended in the process, go successively to dynamic scan after distributing SEQ signaling；First single-frequency intermediate station SFR receives frame
When can suspend dynamic scan, then judge whether this frame is LC frame, if it is LC frame and content FLCO is equal to 0b1111, and
When content SFR ID is equal to current single-frequency intermediate station ID, then explanation is by current first single-frequency intermediate station SFR in CH1 channels offset
90ms is come the frame for forwarding hand platform terminal MS to send, and when content SFR ID is not equal to the ID of current single-frequency intermediate station, then explanation is worked as
The frame that preceding first single-frequency intermediate station SFR does not forward hand platform terminal MS to send, and be to switch to CH2 and wait for reception and deviate 90ms and turn
Send out the frame that another single-frequency intermediate station is sent, the just directly offset 90ms forwarding of the frame of other situations；When forwarding voice End of Frame,
First single-frequency intermediate station SFR will continue to the SEQ signaling of transmitting M frame, go successively to dynamic scan after distributing SEQ signaling.
As the further explanation to method of the present invention, it is preferable that enter after the second single-frequency intermediate station SFR booting
Dynamic scan, can be spaced in an idle state T seconds time CH2 channel go transmitting N frame SEQ signaling so that hand platform terminal MS connects
It receives SEQ signaling and is able to know which single-frequency intermediate station is closer apart from oneself；Second single-frequency intermediate station SFR is sending SEQ signaling
Dynamic scan can be suspended in the process, go successively to dynamic scan after distributing SEQ signaling；Second single-frequency intermediate station SFR receives frame
When can suspend dynamic scan, then judge whether this frame is LC frame, if it is LC frame and content FLCO is equal to 0b1111, and
When content SFR ID is equal to the ID of current single-frequency intermediate station, then explanation is by the second single-frequency intermediate station SFR in CH1 channels offset
90ms is come the frame that forwards hand platform terminal MS to send, when content SFR ID is not equal to the ID of current single-frequency intermediate station, then illustrates the
The frame that two single-frequency intermediate station SFR do not forward hand platform terminal MS to send, and be to switch to CH2 and wait for reception and deviate 90ms forwarding separately
The frame that one single-frequency intermediate station is sent；The just directly offset 90ms forwarding of the frame of other situations；When forwarding voice End of Frame, second
Single-frequency intermediate station SFR will continue to the SEQ signaling of transmitting M frame, go successively to dynamic scan after distributing SEQ signaling.
As the further explanation to method of the present invention, it is preferable that hand platform terminal MS works in dynamic scan, hand
Platform terminal MS can scan SEQ frame and suspend dynamic scan, if received before the signal intensity ratio of the SEQ frame received
The signal strength of SEQ frame is stronger, will letter the content single-frequency intermediate station address SFR Address of SEQ frame and when receiving SEQ
Number intensity saves backup and gets up, and to use when initiating transmitting business, receives and goes successively to dynamically sweep after the completion of process
It retouches；When hand platform terminal MS has transmitting business, hand platform terminal MS suspends dynamic scan first and assembles a special LC frame,
And the single-frequency intermediate station ID of most strong downlink signal intensity is filled up to SFR ID, FLCO is assigned a value of 0b1111, when transmitting
The value of this special LC frame and conventional FLCO be not the LC frame of 0b1111 alternately, then switch to the initiation of DCH1 channel
Call business connects after call business and enters dynamic scan；So that hand platform terminal MS receives the signal of SEQ by comparison
Intensity is used to turn come the business for selecting the single-frequency intermediate station closer from oneself to forward oneself from oneself farther single-frequency intermediate station
The business for sending out current closer single-frequency intermediate station, to make two single-frequency intermediate stations can be with cascade network, topological network.
Beneficial effects of the present invention are as follows: the SEQ for the single-frequency intermediate station that hand platform terminal is received by comparison in the present invention
Signal strength in signaling is come the business that selects the single-frequency intermediate station closer from oneself to forward oneself, from oneself farther single-frequency
Intermediate station is used to forward the business of current closer single-frequency intermediate station, thus make two single-frequency intermediate stations can be with cascade network, topology
Network.
Detailed description of the invention
Fig. 1 is hand platform terminal and two single-frequency intermediate station networking diagrams of the invention；
Fig. 2 is the working principle diagram of the first single-frequency intermediate station SFR of the invention；
Fig. 3 is the working principle diagram of the second single-frequency intermediate station SFR of the invention；
Fig. 4 is the working principle diagram of hand platform terminal MS of the invention；
Fig. 5 is the schematic diagram of the case where hand platform terminal transmission of the invention is forwarded by two single-frequency intermediate station cascades one；
Fig. 6 is the schematic diagram of the case where hand platform terminal transmission of the invention is forwarded by two single-frequency intermediate station cascades two；
Fig. 7 is the schematic diagram of alignment channelling mode in the prior art；
Fig. 8 is the schematic diagram of single-frequency transfer mode in the prior art.
Specific embodiment
It is attached now in conjunction with appended preferred embodiment in order to further appreciate that structure of the invention, feature and other purposes
With attached drawing, detailed description are as follows, this attached drawing embodiment described is only used to illustrate the technical scheme of the present invention, and non-limiting
Invention.
As shown in FIG. 1, FIG. 1 is hand platform terminals of the invention and two single-frequency intermediate station networking diagrams；One kind is by hand platform terminal
Method to determine two single-frequency intermediate station cascade networks, is the networking that two single-frequency intermediate stations are determined by terminal.First
Single-frequency intermediate station SFRA and the second single-frequency intermediate station SFRB can be spaced the time of T in an idle state to continuously transmit N number of SEQ letter
(definition of SEQ signaling such as table 1) is enabled, M SEQ signaling, all hand platform terminals can be also continuously transmitted at the end of emitting voice
The signal strength that MS passes through the SEQ (the single-frequency intermediate station ID number of downlink is filled in inside SEQ) and detection SEQ that receive can
To know hand platform terminal is closer at a distance from which single-frequency intermediate station.It, can be with when hand platform terminal initiates voice service in this way
It selects by the single-frequency intermediate station closer from hand platform terminal come the business of forwarding terminal, and farther single-frequency intermediate station is another to forward
The business of a single-frequency intermediate station, to realize the cascade network of two single-frequency intermediate stations.
1 SEQ content of table
Specific implementation process are as follows:
All had in the dynamic channel list of first single-frequency intermediate station SFRA and the second single-frequency intermediate station SFRB channel CH1 and
Channel CH2, and set the reception frequency point of channel CH1 as F1, launching frequency F2, set the reception frequency point of channel CH2 as F2, hair
Radio frequency point is F3；There is channel DCH1 and channel DCH2 in the dynamic channel list of hand platform terminal MS, and set channel DCH1's
Reception frequency point is F2, and the reception frequency point of launching frequency F1, channel DCH2 are F3, launching frequency F2.Therefore, the method packet
Include: the first single-frequency intermediate station SFRA forwards the frame of hand platform terminal MS using channel CH1, and the second single-frequency intermediate station SFRB uses letter
Road CH2 forwards the frame of the first single-frequency intermediate station SFRA, and hand platform terminal MS initiates business and need to be switched on channel DCH1 to carry out,
To realize the cascade network of the first single-frequency intermediate station SFRA and the second single-frequency intermediate station SFRB.
The first single-frequency intermediate station SFRA and the second single-frequency intermediate station SFRB default work is set in dynamic scan mode, that is, is divided
Ceaselessly poll is not switched to channel CH1 and channel CH2, wherein the first single-frequency intermediate station SFRA is N number of in interval T time transmitting
Dynamic scan can be suspended when SEQ signaling and provide to emit SEQ signaling on channel CH1, the second single-frequency intermediate station SFRB is in interval T
Time can suspend dynamic scan and provide to emit SEQ signaling, the first single-frequency intermediate station on channel CH2 when emitting N number of SEQ signaling
SFRA and the second single-frequency intermediate station SFRB will continue to dynamic scan after distributing SEQ signaling.First single-frequency intermediate station SFRA and
Two single-frequency intermediate station SFRB can suspend dynamic scan when receiving frame or forwarding frame business, until receiving or forwarding industry
Just continue dynamic scan after business.
The default work of hand platform terminal MS is set in dynamic scan mode, meeting is temporary when hand platform terminal MS will initiate call business
Stop dynamic scan and provide to carry out on channel DCH1, will continue to dynamic scan after distributing call business；When hand platform terminal MS connects
Dynamic scan can be suspended by receiving frame, just continue dynamic scan after receiving service ending.
It sets N and is more than or equal to 1, M more than or equal to 1, T greatly and equal to 1 second
Fig. 2 is please referred to, Fig. 2 is the working principle diagram of the first single-frequency intermediate station SFR of the invention；First single-frequency intermediate station
Enter dynamic scan after SFRA booting, can be spaced under idle state (not being the state in transmitting business or receiving frame business)
T seconds time went transmitting N frame SEQ signaling in CH1 channel, so that hand platform terminal MS receives SEQ signaling and which single-frequency be able to know that
Intermediate station is closer apart from oneself；First single-frequency intermediate station SFRA can suspend dynamic scan in sending SEQ signaling procedure, distribute
Dynamic scan is gone successively to after SEQ signaling；First single-frequency intermediate station SFRA can suspend dynamic scan when receiving frame, then judge
Whether this frame is LC frame, and if it is LC frame and content FLCO is equal to 0b1111, and when content SFRID is equal in current single-frequency
When turntable ID, then explanation forwards the hand platform terminal MS to send by current first single-frequency intermediate station SFRA in CH1 channels offset 90ms
Frame, when content SFR ID be not equal to current single-frequency intermediate station ID when, then illustrate that current first single-frequency intermediate station SFRA does not turn
The frame sent of hair hand platform terminal MS, and be to switch to CH2 and wait for reception and deviate 90ms and another single-frequency intermediate station is forwarded to send
Frame, just directly offset 90ms is forwarded for the frames of other situations；When forwarding voice End of Frame, the first single-frequency intermediate station SFRA can be after
Supervention penetrates the SEQ signaling of M frame, goes successively to dynamic scan after distributing SEQ signaling.
Fig. 3 is please referred to, Fig. 3 is the working principle diagram of the second single-frequency intermediate station SFR of the invention；Second single-frequency intermediate station
Enter dynamic scan after SFRB booting, can be spaced under idle state (not being the state in transmitting business or receiving frame business)
T seconds time went transmitting N frame SEQ signaling in CH2 channel, so that hand platform terminal MS receives SEQ signaling and which single-frequency be able to know that
Intermediate station is closer apart from oneself；Second single-frequency intermediate station SFRB can suspend dynamic scan in sending SEQ signaling procedure, distribute
Dynamic scan is gone successively to after SEQ signaling；Second single-frequency intermediate station SFRB can suspend dynamic scan when receiving frame, then judge
Whether this frame is LC frame, and if it is LC frame and content FLCO is equal to 0b1111, and when content SFRID is equal in current single-frequency
When the ID of turntable, then explanation forwards the hand platform terminal MS to send by the second single-frequency intermediate station SFRB in CH1 channels offset 90ms
Frame then illustrates that the second single-frequency intermediate station SFRB does not forward hand platform when content SFR ID is not equal to the ID of current single-frequency intermediate station
The frame that terminal MS is sent, and be to switch to CH2 and wait for reception and deviate the frame that 90ms forwards another single-frequency intermediate station to send；Its
The just directly offset 90ms forwarding of the frame of its situation；When forwarding voice End of Frame, the second single-frequency intermediate station SFRB will continue to transmitting M
The SEQ signaling of frame, goes successively to dynamic scan after distributing SEQ signaling.
Fig. 4 is please referred to, Fig. 4 is the working principle diagram of hand platform terminal MS of the invention；The work of hand platform terminal MS is dynamically being swept
It retouches, hand platform terminal MS can scan SEQ frame and suspend dynamic scan, if connect before the signal intensity ratio of the SEQ frame received
The signal strength of the SEQ frame received is stronger, will be the content single-frequency intermediate station address SFR Address and reception SEQ of SEQ frame
When signal strength save backup get up, to be used when initiating transmitting business, receive process after the completion go successively to
Dynamic scan；When hand platform terminal MS has transmitting business, hand platform terminal MS suspends dynamic scan first and assembles a spy
Different LC frame (the definition such as table 2 of special LC frame), and the single-frequency intermediate station ID of most strong downlink signal intensity is filled up to SFR ID,
FLCO is assigned a value of 0b1111, the value of this special LC frame and conventional FLCO are not that the LC frame of 0b1111 is handed over when transmitting
For progress, then switches to DCH1 channel and initiate call business, connected after call business and enter dynamic scan.
The meaning of this special LC frame is hand platform terminal MS to be received the signal strength of SEQ and selects from oneself by comparing
Closer single-frequency intermediate station forwards oneself business, from oneself farther single-frequency intermediate station is used to forward in current closer single-frequency
The business of turntable, to make two single-frequency intermediate stations can be with cascade network, topological network.
The special LC PDU content of table 2
It can be seen from the above, to realize that the cascade network of two single-frequency intermediate stations needs one of single-frequency intermediate station to use
CH1 forwards the frame of MS, and another single-frequency intermediate station forwards the frame of another single-frequency intermediate station with CH2.It enumerates below
Two application scenarios:
Scene one, Fig. 5 are to illustrate a kind of application scenarios, i.e. hand platform MS A and SFR A is with close, and MS B and SFR B are more
Closely.Hand platform MS A initiates call business in DCH1 channel, and the special LC and routine LC of MS A is alternately (such as Fig. 5
" 1 "), the effect of the special LC of MS A is to forward the frame of MS A for selecting SFR A；SFR A receives special LC and parses
The frame (" 2 " of such as Fig. 5) for forwarding MS A in CH1 channels offset 90ms by SFR A oneself is known afterwards；SFR B receives special LC
Know oneself in the frame (" 3 " of such as Fig. 5) of channel CH2 channels offset 90ms forwarding SFR A after frame；MS B receives SFR B hair
The frame come.MS A in this way initiates call business, after SFR A transfer, intermediate station is cascaded using SFR B, close to SFR B's
MS B receives the call business of MS A initiation, to realize the cascade and network topology of two single-frequency intermediate stations.
Scene two, Fig. 6 are to illustrate a kind of application scenarios, i.e. hand platform MS A and SFR B is with close, and MS B and SFR A are more
Closely.Hand platform MS A initiates call business in DCH1 channel, and the special LC and routine LC of MS A is alternately (such as Fig. 6
" 1 "), the effect of the special LC of MS A is to forward the frame of MS A for selecting SFR B；SFR B receives special LC and parses
The frame (" 2 " of such as Fig. 6) for forwarding MS A in CH1 channels offset 90ms by SFR B oneself is known afterwards；SFR A receives special LC
Know oneself in the frame (" 3 " of such as Fig. 6) of channel CH2 channels offset 90ms forwarding SFR B after frame；MS B receives SFR A hair
The frame come.MS A in this way initiates call business, after SFR B transfer, intermediate station is cascaded using SFR A, close to SFR A's
SFR B receives the call business of MS A initiation, to realize the cascade and network topology of two single-frequency intermediate stations.
It is to be understood that foregoing invention content and specific embodiment are intended to prove technical solution provided by the present invention
Practical application should not be construed as limiting the scope of the present invention.Those skilled in the art are in spirit and principles of the present invention
It is interior, when can various modifications may be made, equivalent replacement or improvement.Protection scope of the present invention is subject to the appended claims.
Claims (7)
1. a kind of method for determining two single-frequency intermediate station cascade networks by hand platform terminal, which is characterized in that the method packet
It includes:
First single-frequency intermediate station SFR (A) and the second single-frequency intermediate station SFR (B) can be spaced the time of T in an idle state to connect
Supervention send N number of SEQ signaling, and M SEQ signaling can be continuously transmitted at the end of emitting voice；
Hand platform terminal MS receives the SEQ signaling of the first single-frequency intermediate station SFR (A) and the second single-frequency intermediate station SFR (B), the SEQ
The ID number of the first single-frequency intermediate station SFR (A) and the second single-frequency intermediate station SFR (B) in signaling with downlink；
In the SEQ signaling of the detection of hand platform terminal MS and comparison the first single-frequency intermediate station SFR (A) and the second single-frequency intermediate station SFR (B)
Signal strength, and select according to the signal strength to forward apart from oneself closer single-frequency intermediate station oneself business, from
Oneself farther single-frequency intermediate station is used to forward the business of current closer single-frequency intermediate station, to realize the first single-frequency intermediate station SFR
(A) and the cascade network of the second single-frequency intermediate station SFR (B).
2. the method as described in claim 1, which is characterized in that the first single-frequency intermediate station SFR (A) and the second single-frequency intermediate station
Channel CH1 and channel CH2 are all had in the dynamic channel list of SFR (B), and the reception frequency point for setting channel CH1 emits as F1
Frequency point is F2, sets the reception frequency point of channel CH2 as F2, launching frequency F3；
There is channel DCH1 and channel DCH2 in the dynamic channel list of hand platform terminal MS, and set the reception frequency point of channel DCH1
For F2, the reception frequency point of launching frequency F1, channel DCH2 are F3, launching frequency F2；
Wherein, a single-frequency intermediate station in the first single-frequency intermediate station SFR (A) and the second single-frequency intermediate station SFR (B) uses channel
CH1 forwards the frame of hand platform terminal MS, another single-frequency intermediate station forwards the frame of previous single-frequency intermediate station using channel CH2,
And hand platform terminal MS initiation business need to be switched on DCH1 and carry out.
3. method according to claim 2, which is characterized in that the first single-frequency intermediate station SFR (A) and the second single-frequency intermediate station
Ceaselessly poll is switched to channel CH1 and channel CH2 in dynamic scan mode and respectively for SFR (B) work, wherein the first single-frequency
Intermediate station SFR (A) can suspend dynamic scan when being spaced T time and emitting N number of SEQ signaling and provide to emit SEQ on channel CH1
Signaling, the second single-frequency intermediate station SFR (B) can suspend dynamic scan when being spaced T time and emitting N number of SEQ signaling and provide believing
Emit SEQ signaling on road CH2, the first single-frequency intermediate station SFR (A) and the second single-frequency intermediate station SFR (B) are after distributing SEQ signaling
It will continue to dynamic scan；First single-frequency intermediate station SFR (A) and the second single-frequency intermediate station SFR (B) are receiving frame or are turning
Dynamic scan can be suspended when sending out frame business, just continue dynamic scan after reception or forwarding service.
4. method according to claim 2, which is characterized in that the work of hand platform terminal MS is in dynamic scan mode, when hand platform is whole
End MS can suspend dynamic scan and provide to carry out on channel DCH1 when initiating call business, will continue to after distributing call business
Dynamic scan；Dynamic scan can be suspended when hand platform terminal MS receives frame, just continue dynamic scan after receiving service ending.
5. method according to claim 2, which is characterized in that enter dynamic after the first single-frequency intermediate station SFR (A) booting and sweep
Retouch, can be spaced in an idle state T seconds time CH1 channel go transmitting N frame SEQ signaling so that hand platform terminal MS receive SEQ letter
It enables and is able to know which single-frequency intermediate station is closer apart from oneself；
First single-frequency intermediate station SFR (A) can suspend dynamic scan in sending SEQ signaling procedure, distribute continue after SEQ signaling into
Enter dynamic scan；
First single-frequency intermediate station SFR (A) can suspend dynamic scan when receiving frame, then judge whether this frame is LC frame, if
Be that LC frame and content FLCO are equal to 0b1111, and when content SFR ID is equal to current single-frequency intermediate station ID, then explanation by
Current first single-frequency intermediate station SFR (A) in CH1 channels offset 90ms come the frame that forwards hand platform terminal MS to send, as content SFR
When ID is not equal to the ID of current single-frequency intermediate station, then illustrate that current first single-frequency intermediate station SFR (A) does not forward hand platform terminal MS to send out
The frame come, and be to switch to CH2 and wait for reception and deviate the frame that 90ms forwards another single-frequency intermediate station to send, other situations
Frame just directly offset 90ms forwarding；When forwarding voice End of Frame, the first single-frequency intermediate station SFR (A) will continue to transmitting M frame
SEQ signaling goes successively to dynamic scan after distributing SEQ signaling.
6. method according to claim 2, which is characterized in that enter dynamic after the second single-frequency intermediate station SFR (B) booting and sweep
Retouch, can be spaced in an idle state T seconds time CH2 channel go transmitting N frame SEQ signaling so that hand platform terminal MS receive SEQ letter
It enables and is able to know which single-frequency intermediate station is closer apart from oneself；
Second single-frequency intermediate station SFR (B) can suspend dynamic scan in sending SEQ signaling procedure, distribute continue after SEQ signaling into
Enter dynamic scan；
Second single-frequency intermediate station SFR (B) can suspend dynamic scan when receiving frame, then judge whether this frame is LC frame, if
It is that LC frame and content FLCO are equal to 0b1111, and when content SFR ID is equal to the ID of current single-frequency intermediate station, then illustrate
By the second single-frequency intermediate station SFR (B) in CH1 channels offset 90ms come the frame that forwards hand platform terminal MS to send, as content SFR ID
Not equal to current single-frequency intermediate station ID when, then illustrate that the second single-frequency intermediate station SFR (B) does not forward hand platform terminal MS to send
Frame, and be to switch to CH2 and wait for reception and deviate the frame that 90ms forwards another single-frequency intermediate station to send；The frame of other situations is just
Directly offset 90ms forwarding；When forwarding voice End of Frame, the second single-frequency intermediate station SFR (B) will continue to the SEQ letter of transmitting M frame
It enables, goes successively to dynamic scan after distributing SEQ signaling.
7. method according to claim 2, which is characterized in that hand platform terminal MS works in dynamic scan, hand platform terminal MS meeting
It scans SEQ frame and suspends dynamic scan, if the letter of the SEQ frame received before the signal intensity ratio of the SEQ frame received
Number intensity is stronger, will the signal strength the content single-frequency intermediate station address SFR Address of SEQ frame and when receiving SEQ protect
Backup is deposited, to be used when initiating transmitting business, process is received and goes successively to dynamic scan after the completion；
When hand platform terminal MS has transmitting business, hand platform terminal MS suspends dynamic scan first and assembles a special LC
Frame, and the single-frequency intermediate station ID of most strong downlink signal intensity is filled up to SFRID, FLCO is assigned a value of 0b1111, transmitting when
Wait this special LC frame and conventional FLCO value be not 0b1111 LC frame alternately, then switch to DCH1 channel hair
Call business is played, is connected after call business and enters dynamic scan；So that hand platform terminal MS receives the letter of SEQ by comparison
Number intensity is used to come the business for selecting the single-frequency intermediate station closer from oneself to forward oneself from oneself farther single-frequency intermediate station
The business for forwarding current closer single-frequency intermediate station, to make two single-frequency intermediate stations can be with cascade network, topological network.
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