CN114286351A - TDMA wireless ad hoc network branching service relay method - Google Patents
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Abstract
The invention relates to a TDMA wireless ad hoc network bifurcation service relay method, which is used for service relay between a main path and a branch path and comprises a forward transmission method and a reverse transmission method, wherein the forward transmission is used for transmitting information to the branch path from a main path node, and the reverse transmission is used for transmitting information to the main path from the branch path node. The reverse transmission method comprises a branch head node FGR reverse transmission method, a two-level node FSGR reverse transmission method and a three-level node FSR reverse transmission method. The invention has the advantages that: the receiving and transmitting frequencies of the nodes on the branch path are adjusted according to requirements, so that the nodes on the branch path can communicate with the nodes on the main path, and the nodes on the branch path and the mobile stations below the nodes can be maintained to communicate with each other.
Description
Technical Field
The invention relates to the field of wireless ad hoc networks, in particular to a TDMA wireless ad hoc network fork service relay method.
Background
DMR/PDT is a widely used digital professional wireless communication system standard at present. The common DMR/PDT communication use modes include a conventional direct communication mode, a conventional transfer communication mode and a trunking communication mode. The former conventional direct mode only requires mobile station equipment, such as walkie-talkies and/or vehicle stations, to directly perform traffic transmission, such as conversation, between 2 or more mobile stations. This approach has extremely limited coverage due to the linear propagation characteristics of radio high frequency rf. The latter two ways require the establishment of a base station, and the communication coverage can be enlarged by forwarding the service through the base station. In order to increase the communication coverage area, the base station antenna is installed at a high position, such as a mountain or a roof, but in this case, the base station becomes a fixed base station. In special situations, such as in the field, a cave/tunnel. Basements and the like often have no base station signals or are not easy to erect base stations, and the ad hoc network technology can enlarge the communication distance through the networking between mobile stations under the condition of only using mobile station equipment, so that the problem of long-distance communication is solved.
In the area without network coverage, a group of mobile terminals uses a plurality of channels, and selects a transit mobile terminal as a transit node through competition to form a temporary service multi-hop network. Several transit mobile terminals can transmit the service (such as voice) to remote place to form a service area with larger coverage area.
The method of arranging transit nodes in a line is the simplest network mode, and can cover a long narrow rectangular area. In practical use, there may be other shapes that need to cover the area, such as a square area with a large length and a large width, and this requirement may be realized by forking the ad hoc network, however, the conventional ad hoc network communication method is not suitable for the forked ad hoc network.
Disclosure of Invention
The invention mainly solves the problem that the traditional ad hoc network communication mode can not be used for the ad hoc network with branches, and provides a TDMA wireless ad hoc network branching service relay method for realizing forward and reverse communication of a main path and a branch path.
The technical scheme adopted by the invention for solving the technical problem is that the method is used for service relay between a main path and a branch path, the branch path comprises a branch head node FGR, a secondary node FSGR and a tertiary node FSR, the service frequency of the main path is T frequency, the service frequency of the branch path is X frequency, and the method comprises a forward transmission method and a reverse transmission method, wherein the forward transmission method comprises the following steps:
s01: the main path node transmits service signaling by T frequency;
s02: the branch head node FGR receives the service signaling of the main path with T frequency and transfers the service signaling with X frequency, and the mobile station under the branch head node FGR receives the service signaling with X frequency;
s03: the second-level node FSGE receives and transfers the service signaling transferred by the branch first node FGR at the X frequency, and the mobile station under the second-level node FSGR receives the service signaling at the X frequency;
s04: the third-level node FSR receives and transfers the service signaling transferred by the second-level node FSGR at the X frequency, and the mobile station under the third-level node FSR receives the service signaling at the X frequency. The mutual communication between the nodes on the main path adopts a traditional ad hoc network communication mode, the service of the nodes on the main path is transmitted to the nodes on the branch path to become forward communication, and the service head node FGR receives the service data by the T frequency of the main path and transmits the service data by the X frequency of the branch path, so that the service data transfer of the main path and the branch path is realized.
As a preferred scheme of the above scheme, the reverse transmission method includes a branch head node FGR reverse transmission method, a two-level node FSGR reverse transmission method, and a three-level node FSR reverse transmission method, and the branch head node FGR reverse transmission method includes the following steps:
s11: the mobile station to be transmitted with signaling under the branch head node FGR transmits a first signaling with T frequency on a receiving time slot in a service parity access method used by the branch head node FGR;
s12: the first signaling is transferred by the branch first node FGR on the X frequency, the receiving time slot in the service odd-even access method in the superframe is changed from the T frequency to the X frequency, and the transmitting time slot is changed from the X frequency to the T frequency;
s13: after the second-level node FSGR receives the first signaling, the receiving time slot in the service odd-even access method in the superframe is changed from the X frequency to the T frequency;
s14: after receiving the first signaling, the mobile station except the signaling to be transmitted under the first node FGR of the branch changes the receiving time slot in the service odd-even access method in the superframe from X frequency to T frequency;
s15: the mobile station to be transmitted under the branch head node FGR transmits service signaling at the X frequency. The first signaling is similar to the channel allocation signaling and is used for informing the branch head node FGR and the secondary node FSGR to perform frequency conversion, so that the node on the main path and the secondary node FSGR can both receive the service signaling forwarded from the branch head node FGR at the T frequency, and the tertiary node FSR receives the service signaling forwarded by the secondary node FSGR at the X frequency.
As a preferred scheme of the above scheme, the secondary node FSGR reverse transmission method includes the following steps:
s21: the mobile station under the second-level node FSGR transmits service signaling on the X frequency;
s22: the second-level node FSGR temporarily stores the service signaling, transmits a first signaling on the T frequency and then transfers the service signaling by the X frequency;
s23: after receiving the first signaling, the first signaling is transferred in the X frequency by the branch first node FGR, and the receiving time slot in the service odd-even access method in the superframe is changed from the T frequency to the X frequency, and the transmitting time slot is changed from the X frequency to the T frequency;
s24: the branch first node FGR receives the service signaling by X frequency and transfers the service signaling by T frequency;
s25: the three-level node FSR receives and relays traffic signaling at the X frequency. The receiving and transmitting frequency conversion is carried out through the branch head node FGR, so that the branch head node can transfer the service signaling transferred by the second-level node FSGR to the node on the main path, and the third-level node FSR receives the service signaling transferred by the second-level node FSGR by the X frequency.
As a preferable scheme of the above scheme, the FSR reverse transmission method for the three-level node includes the following steps:
s31: the mobile station under the FSR of the third-level node transmits service signaling on the X frequency;
s32: the third-level node FSR transfers the service signaling in the X frequency;
s33: the second-level node FSGR temporarily stores the service signaling, transmits a first signaling on the T frequency and then transfers the service signaling by the X frequency;
s34: after receiving the first signaling, the first signaling is transferred in the X frequency by the branch first node FGR, and the receiving time slot in the service odd-even access method in the superframe is changed from the T frequency to the X frequency, and the transmitting time slot is changed from the X frequency to the T frequency;
s35: the finger head node FGR receives the traffic signaling at the X frequency and relays the traffic signaling at the T frequency.
As a preferred scheme of the above scheme, after receiving the first signaling transferred by the FGR in the X frequency, the mobile station under the finger head node FGR changes the receiving time slot in the service parity access method in the superframe from the X frequency to the T frequency. So that the mobile station under the finger head node FGR can maintain communication with the finger head node.
As a preferred scheme of the above scheme, the node of the main path, the branch head node FGR, the secondary node FSGR, and the tertiary node FSR all determine the transmitting and receiving time slot by using an odd-even access method. The odd-even access method can enable the business data on the main path and from the main path to the branch to be transmitted at the fastest theoretical speed.
As a preferable scheme of the above scheme, the parity access method of the node of the main path is determined by setting a LIFE value at the group leader node of the main path, decreasing LIFE values of the remaining nodes in the main path as the distance from the group leader node increases, and when the LIFE value of one node is an odd number, the node is an odd access method, and otherwise, the node is an even access method.
As a preferable mode of the above-described mode, the multi-frame format of the branch head node FGR is generated according to the parity access method of the node of the main path followed by the branch head node FGR, the multi-frame format of the secondary node FSGR is generated according to the parity access method of the branch head node FGR followed by the secondary node FSGR, and the multi-frame format of the tertiary node FSR is generated according to the parity access method of the secondary node FSGR followed by the tertiary node FSR.
The invention has the advantages that: the receiving and transmitting frequencies of the nodes on the branch path are adjusted according to requirements, so that the nodes on the branch path can communicate with the nodes on the main path, and the nodes on the branch path and the mobile stations below the nodes can be maintained to communicate with each other.
Drawings
Fig. 1 is a flow chart of a forward transmission method in the embodiment.
Fig. 2 is a flow chart of the FGR reverse transmission method in the embodiment of the branch header node.
Fig. 3 is a flowchart illustrating a reverse transmission method of the FSGR of the secondary node in the embodiment.
Fig. 4 is a flow chart of a three-level node FSR reverse transmission method in the embodiment.
Detailed Description
The technical solution of the present invention is further described below by way of examples with reference to the accompanying drawings.
Example (b):
the present embodiment is a TDMA wireless ad hoc network forking service relay method, which is used for service relay between a main path and a branch path, where the branch path includes a branch head node FGR, a secondary node FSGR, and a tertiary node FSR, a service frequency of the main path is a T frequency, a service frequency of the branch path is an X frequency, and the method includes a forward transmission method and a reverse transmission method, where the forward transmission is a transmission of information from a node of the main path to the branch path, and the reverse transmission is a transmission of information from a node of the branch path to the main path.
As shown in fig. 1, the forward transmission method includes the steps of:
s01: the main path node transmits service signaling by T frequency;
s02: the branch head node FGR receives the service signaling of the main path with T frequency and transfers the service signaling with X frequency, and the mobile station under the branch head node FGR receives the service signaling with X frequency;
s03: the second-level node FSGR receives and transfers the service signaling transferred by the branch first node FGR at the X frequency, and the mobile station under the second-level node FSGR receives the service signaling at the X frequency;
s04: the third-level node FSR receives and transfers the service signaling transferred by the second-level node FSGR at the X frequency, and the mobile station under the third-level node FSR receives the service signaling at the X frequency.
For the branch with nesting, the forward transmission method is the same as the method, a first node parallel to the FSR node is also present under the second-level node FSGR of the branch FGR-FSGR, the first node is the first node FGR in the nesting branch of the branch FGR-FSGR-FSR, the nesting branch adopts the Y frequency different from the X frequency and the T frequency, when the main path node transmits information, the steps S01 to S03 are executed firstly, so that the service signaling sent by the main path node reaches the second-level node FSGR for forwarding, then the step S02 is executed by using the identity of the first node FGR, the T frequency in the step is replaced by the X frequency, and the X frequency is replaced by the Y frequency, so that the mobile station under the first node can receive the service signaling.
The reverse transmission method comprises a branch head node FGR reverse transmission method, a two-level node FSGR reverse transmission method and a three-level node FSR reverse transmission method. As shown in fig. 2, the method for reverse transmission of the finger head node FGR includes the following steps:
s11: the mobile station to be transmitted with signaling under the branch head node FGR transmits a first signaling with T frequency on a receiving time slot in a service parity access method used by the branch head node FGR;
s12: the first signaling is transferred by the branch first node FGR on the X frequency, the receiving time slot in the service odd-even access method in the superframe is changed from the T frequency to the X frequency, and the transmitting time slot is changed from the X frequency to the T frequency;
s13: after the second-level node FSGR receives the first signaling, the receiving time slot in the service odd-even access method in the superframe is changed from X frequency to T frequency, and the transmitting time slot is still X frequency;
s14: after receiving the first signaling, the mobile station except the signaling to be transmitted under the first node FGR of the branch changes the receiving time slot in the service odd-even access method in the superframe from X frequency to T frequency;
s15: the mobile station to be transmitted under the branch head node FGR transmits service signaling at the X frequency. The branch head node FGR transfers the service signaling in T frequency, and the main path node can receive the reverse service and transfer the reverse service on the main path; the FSGR can also receive the traffic signaling at the T frequency and relay the traffic signaling at the X frequency. The FSR node still receives the service signaling transferred by the FSGR node at the X frequency, and then transfers the service signaling at the branched X frequency.
For the branch with nesting, the nested branch first node FGR reverse transmission method is similar to the above method, there is a second node parallel to the FSGR node under the branch first node FGR of the existing branch FGR-FSGR-FSR, the second node is the first branch FGR in the nested branch of the branch FGR-FSGR-FSR, the nested branch uses Y1 frequency different from X frequency and T frequency, when the mobile station under the second node needs to transmit the traffic signaling, the steps S11 to S15 are first executed, but it should be noted that the T frequency in the step is replaced by X frequency when the steps S11 to S15 are executed, the X frequency Y1 frequency, after the execution, the traffic signaling can be received by the branch first node FGR, and then the steps S11 to S15 are executed again to enable the branch first node to transfer the traffic signaling to the main node and the whole network.
As shown in fig. 3, the reverse transmission method of the FSGR of the secondary node includes the following steps:
s21: the mobile station under the second-level node FSGR transmits service signaling on the X frequency;
s22: the second-level node FSGR temporarily stores the service signaling, transmits a first signaling on the T frequency and then transfers the service signaling by the X frequency;
s23: after receiving the first signaling, the first signaling is transferred in the X frequency by the branch first node FGR, and the receiving time slot in the service odd-even access method in the superframe is changed from the T frequency to the X frequency, and the transmitting time slot is changed from the X frequency to the T frequency; after receiving the first signaling transferred by FGR in X frequency, the mobile station under the first node FGR changes the receiving time slot in the service odd-even access method in the superframe from X frequency to T frequency.
S24: the branch first node FGR receives the service signaling by X frequency and transfers the service signaling by T frequency; and enabling the main path node to receive the service information.
S25: the three-level node FSR receives and relays traffic signaling at the X frequency.
For the branch with nesting, the method for reverse transmission of the secondary node FSGR of the nested branch is similar to the above method, and there is also a nested branch under the secondary node FSGR of the branch FGR-FSGR-FSR, the structure of the nested branch is assumed to be FGR-FSGR, the nested branch uses a Y frequency different from the X frequency and the T frequency, when the mobile station under the FSGR in the nested branch needs to transmit the traffic signaling, first, step S21 to step S24 are executed, but it should be noted that, when step S21 to step S24 are executed, the T frequency in the step is replaced by the X frequency, the X frequency is replaced by the Y frequency, after the execution, the traffic signaling can be received by the upper node FSGR, and then, step S21 to step S25 are executed again to transfer the traffic signaling to the primary node and the whole network.
As shown in fig. 4, the three-level node FSR reverse transmission method includes the following steps:
s31: the mobile station under the FSR of the third-level node transmits service signaling on the X frequency;
s32: the third-level node FSR transfers the service signaling in the X frequency;
s33: the second-level node FSGR temporarily stores the service signaling, transmits a first signaling on the T frequency and then transfers the service signaling by the X frequency;
s34: after receiving the first signaling, the first signaling is transferred in the X frequency by the branch first node FGR, and the receiving time slot in the service odd-even access method in the superframe is changed from the T frequency to the X frequency, and the transmitting time slot is changed from the X frequency to the T frequency; after receiving the first signaling transferred by FGR in X frequency, the mobile station under the first node FGR changes the receiving time slot in the service odd-even access method in the superframe from X frequency to T frequency.
S35: the finger head node FGR receives the traffic signaling at the X frequency and relays the traffic signaling at the T frequency. And enabling the main path node to receive the service information.
For the branch with nesting, the three-level node FSR reverse transmission method of the nested branch is similar to the method described above, a nested branch also exists under the three-level node FSR of the branch FGR-FSGR-FSR, the structure of the nested branch is assumed to be FGR-FSGR-FSR, the nested branch adopts a Y2 frequency different from the X frequency and the T frequency, when the mobile station under the FSR in the nested branch needs to transmit traffic signaling, step S31 to step S35 are executed first, but it should be noted that the T frequency in the step is replaced by the X frequency and the X frequency is replaced by the Y2 frequency when step S31 to step S35 are executed, after the execution, the traffic signaling can be received by the upper-level node FSR, and then step S31 to step S35 are executed again to enable the branch head node to transfer to the main node in the traffic signaling.
In this embodiment, the node of the main path, the branch head node FGR, the secondary node FSGR, and the tertiary node FSR all determine the transmitting and receiving time slot by using an odd-even access method, the odd-even access method of the node of the main path is determined by the following method, the LIFE value is set by the group length node of the main path, the LIFE values of the other nodes in the main path decrease with the increase of the distance from the group length node, when the LIFE value of one node is an odd number, the node is the odd access method, and otherwise, the node is the even access method. The multi-frame format of the branch head node FGR is generated according to the parity access method of the node of the main path followed by the branch head node FGR, the multi-frame format of the secondary node FSGR is generated according to the parity access method of the branch head node FGR followed by the secondary node FSR, and the multi-frame format of the tertiary node FSR is generated according to the parity access method of the secondary node FSGR followed by the tertiary node FSR.
Taking the branch head node FGR as an example, if the upper node followed by the branch head node is the main path node and uses the even access method, the access method of the branch head node FGR is odd access, and the superframe format thereof is C0, C1, T0, X1, T2, X3, T4, X5, T6, X7, T8, X9, T10, X11, T12, X13, T14, X15, that is, the standby time traffic reception uses the frequency and time slot specified by the upper main path node T0, T2, T4, T6, T8, T10, T12, T14, and the traffic transmission uses the frequency and time slot specified by X1, X3, X5, X7, X9, X11, X13 of the present branch. If the followed superior node is the primary path node and uses the odd access method, the access method of the FGR is the even access, the superframe format is C0, X0, T0, X0, T0, i.e. the standby time service reception uses the frequency and time slot defined by the T0, T0 of the superior primary path node, and the service transmission uses the frequency and time slot defined by the X0, X0 of the present branch.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Claims (8)
1. A TDMA wireless self-organizing network fork business relay method is used for business relay between a main path and a branch path, the branch path comprises a branch head node FGR, a secondary node FSGR and a tertiary node FSR, the business frequency of the main path is T frequency, the business frequency of the branch path is X frequency, and the method is characterized in that: the method comprises a forward transmission method and a reverse transmission method, wherein the forward transmission method comprises the following steps:
s01: the main path node transmits service signaling by T frequency;
s02: the branch head node FGR receives the service signaling of the main path with T frequency and transfers the service signaling with X frequency, and the mobile station under the branch head node FGR receives the service signaling with X frequency;
s03: the second-level node FSGR receives and transfers the service signaling transferred by the branch first node FGR at the X frequency, and the mobile station under the second-level node FSGR receives the service signaling at the X frequency;
s04: the third-level node FSR receives and transfers the service signaling transferred by the second-level node FSGR at the X frequency, and the mobile station under the third-level node FSR receives the service signaling at the X frequency.
2. The method for relaying the branched services of the TDMA wireless ad hoc network according to claim 1, wherein: the reverse transmission method comprises a branch head node FGR reverse transmission method, a two-level node FSGR reverse transmission method and a three-level node FSR reverse transmission method, and the branch head node FGR reverse transmission method comprises the following steps:
s11: the mobile station to be transmitted with signaling under the branch head node FGR transmits a first signaling with T frequency on a receiving time slot in a service parity access method used by the branch head node FGR;
s12: the first signaling is transferred by the branch first node FGR on the X frequency, the receiving time slot in the service odd-even access method in the superframe is changed from the T frequency to the X frequency, and the transmitting time slot is changed from the X frequency to the T frequency;
s13: after the second-level node FSGR receives the first signaling, the receiving time slot in the service odd-even access method in the superframe is changed from the X frequency to the T frequency;
s14: after receiving the first signaling, the mobile station except the signaling to be transmitted under the first node FGR of the branch changes the receiving time slot in the service odd-even access method in the superframe from X frequency to T frequency;
s15: the mobile station to be transmitted under the branch head node FGR transmits service signaling at the X frequency.
3. The relay method for the branched service of the TDMA wireless ad hoc network according to claim 2, wherein: the FSGR reverse transmission method of the secondary node comprises the following steps:
s21: the mobile station under the second-level node FSGR transmits service signaling on the X frequency;
s22: the second-level node FSGR temporarily stores the service signaling, transmits a first signaling on the T frequency and then transfers the service signaling by the X frequency;
s23: after receiving the first signaling, the first signaling is transferred in the X frequency by the branch first node FGR, and the receiving time slot in the service odd-even access method in the superframe is changed from the T frequency to the X frequency, and the transmitting time slot is changed from the X frequency to the T frequency;
s24: the branch first node FGR receives the service signaling by X frequency and transfers the service signaling by T frequency;
s25: the three-level node FSR receives and relays traffic signaling at the X frequency.
4. The relay method for the branched service of the TDMA wireless ad hoc network according to claim 2, wherein: the three-level node FSR reverse transmission method comprises the following steps:
s31: the mobile station under the FSR of the third-level node transmits service signaling on the X frequency;
s32: the third-level node FSR transfers the service signaling in the X frequency;
s33: the second-level node FSGR temporarily stores the service signaling, transmits a first signaling on the T frequency and then transfers the service signaling by the X frequency;
s34: after receiving the first signaling, the first signaling is transferred in the X frequency by the branch first node FGR, and the receiving time slot in the service odd-even access method in the superframe is changed from the T frequency to the X frequency, and the transmitting time slot is changed from the X frequency to the T frequency;
s35: the finger head node FGR receives the traffic signaling at the X frequency and relays the traffic signaling at the T frequency.
5. The method for relaying the TDMA wireless ad hoc network forking service according to claim 3, wherein said method comprises: after receiving the first signaling transferred by FGR in X frequency, the mobile station under the first node FGR changes the receiving time slot in the service odd-even access method in the superframe from X frequency to T frequency.
6. The method for relaying the TDMA wireless ad hoc network forking service according to claim 1 or 5, wherein: and the nodes of the main path, the branch head nodes FGR, the secondary nodes FSGR and the tertiary nodes FSR all adopt an odd-even access method to determine transmitting and receiving time slots.
7. The method for relaying the branched services of the TDMA wireless ad hoc network according to claim 6, wherein said method comprises: the parity access method of the nodes of the main path is determined by the following method, the LIFE value is set by the group leader node of the main path, the LIFE values of the other nodes in the main path decrease with the increase of the distance from the group leader node, when the LIFE value of one node is an odd number, the node is an odd access method, otherwise, the node is an even access method.
8. The method for relaying the branched services of the TDMA wireless ad hoc network according to claim 6, wherein said method comprises: the multi-frame format of the branch head node FGR is generated according to the parity access method of the node of the main path followed by the branch head node FGR, the multi-frame format of the secondary node FSGR is generated according to the parity access method of the branch head node FGR followed by the secondary node FSGR, and the multi-frame format of the tertiary node FSR is generated according to the parity access method of the secondary node FSGR followed by the tertiary node FSR.
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| US20190132906A1 (en) * | 2017-10-26 | 2019-05-02 | Benchmark Electronics, Inc. | Mesh ranging and network message and slot structure for ad-hoc networks and method therefor |
| CN110719652A (en) * | 2019-01-16 | 2020-01-21 | 杭州承联通信技术有限公司 | Wireless ad hoc network method for mobile base station |
| CN110809324A (en) * | 2019-10-10 | 2020-02-18 | 上海交通大学 | MAC protocol based on distributed TDMA and wireless self-organizing network |
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