CN114286351B - TDMA wireless ad hoc network forking service relay method - Google Patents
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Abstract
The invention relates to a TDMA wireless ad hoc network forking 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 from a main path node to the branch path, and the reverse transmission is used for transmitting information from a branch path node to the main path. The reverse transmission method comprises a branch head node FGR reverse transmission method, a secondary node FSGR reverse transmission method and a tertiary node FSR reverse transmission method. The invention has the advantages that: the receiving and transmitting frequencies of the nodes on the branch paths are adjusted as required, so that the nodes on the branch paths can communicate with the main path nodes and can also maintain the nodes on the branch paths to communicate with the mobile stations below the nodes.
Description
Technical Field
The invention relates to the field of wireless ad hoc networks, in particular to a TDMA wireless ad hoc network forking service relay method.
Background
DMR/PDT is a digital professional wireless communication system standard that is currently in wide use. The common DMR/PDT communication modes include a conventional direct communication mode, a conventional transfer mode and a cluster communication mode. The former conventional pass-through mode requires only mobile station equipment, such as interphones and/or car stations, to conduct traffic, such as calls, directly between 2 or more mobile stations. This approach has extremely limited coverage due to the linear propagation characteristics of the radio frequency. The latter two modes require the establishment of a base station, and the communication coverage area can be enlarged by the base station forwarding the service. In order to enlarge the communication coverage area, the base station antenna is installed at a high position, such as a mountain or a roof, but the base station becomes a fixed base station. In some special situations, such as the field, a cave/tunnel. The basement 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 networking among mobile stations under the condition of using only mobile station equipment, so that the problem of long-distance communication is solved.
In areas without network coverage, a group of mobile terminals use a plurality of channels, and a temporary service multi-hop network is formed by competing and electing a transit mobile terminal as a transit node. Several transit mobile terminals can transmit services (such as voice) to distant places to form a service area with larger coverage area.
The method of arranging the transit nodes in a line is the simplest network mode and can cover a longer, narrower rectangular area. In practical use, there may be other shapes of coverage areas, such as square areas with larger length and width, where the requirement can be achieved by branching the ad hoc network, however, the conventional ad hoc network communication method cannot be applied to the branched ad hoc network.
Disclosure of Invention
The invention mainly solves the problem that the traditional ad hoc network communication mode cannot be used for the ad hoc network with branches, and provides a TDMA wireless ad hoc network bifurcation service relay method for realizing forward and reverse communication between a main path and a branch path.
The invention solves the technical problems by adopting a technical scheme that the method is used for service relay between a main path and a branch path, wherein 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, the method comprises a forward transmission method and a reverse transmission method, and the forward transmission method comprises the following steps:
s01: the main path node transmits service signaling at T frequency;
s02: the branch head node FGR receives the service signaling of the main path at the T frequency and transfers the service signaling at the X frequency, and the mobile station under the branch head node FGR receives the service signaling at the X frequency;
s03: the second-level node FSGE receives and transfers the service signaling transferred by the branch head node FGR at the X frequency, and a mobile station under the second-level node FSGR receives the service signaling at the X frequency;
s04: the tertiary node FSR receives and converts the service signaling transferred by the secondary node FSGR at the X frequency, and the mobile station under the tertiary node FSR receives the service signaling at the X frequency. The mutual communication among 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, the service head node FGR receives at the T frequency of the main path and transmits at the X frequency of the branch path, and the service data transfer between the main path and the branch path is realized.
As a preferred solution of the above solution, the reverse transmission method includes a branch head node FGR reverse transmission method, a secondary node FSGR reverse transmission method, and a tertiary node FSR reverse transmission method, and the branch head node FGR reverse transmission method includes the steps of:
s11: a mobile station under a branch head node FGR which is to transmit signaling 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 branch head node FGR transfers the first signaling on the X frequency and changes the receiving time slot in the service parity access method in the super frame from the T frequency to the X frequency, and changes the transmitting time slot from the X frequency to the T frequency;
s13: after receiving the first signaling, the second-level node FSGR changes the receiving time slot in the service parity access method in the super frame 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 branch head node FGR changes the receiving time slot in the service parity access method in the super frame from the X frequency to the T frequency;
s15: the mobile station under the branch head node FGR, which is to transmit signaling, transmits traffic 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 by 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 preferable aspect of the foregoing aspect, the secondary node FSGR reverse transmission method includes the steps of:
s21: a mobile station under a secondary node FSGR transmits service signaling on an X frequency;
s22: the second node FSGR temporarily stores the service signaling, transmits a first signaling on the T frequency, and then transfers the service signaling on the X frequency;
s23: after receiving the first signaling, the branch head node FGR transfers the first signaling in the X frequency and changes the receiving time slot in the service parity access method in the super frame from the T frequency to the X frequency, and changes the transmitting time slot from the X frequency to the T frequency;
s24: the branch head node FGR receives service signaling at the X frequency and transfers the service signaling at the T frequency;
s25: the tertiary node FSR receives and forwards 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 secondary node FSGR to the node on the main path, and the tertiary node FSR receives the service signaling transferred by the secondary node FSGR at the X frequency.
As a preferred solution of the foregoing solution, the three-level node FSR reverse transmission method includes the following steps:
s31: a mobile station under the FSR of the three-level node transmits service signaling on the X frequency;
s32: the three-level node FSR transfers the service signaling in the X frequency;
s33: the second node FSGR temporarily stores the service signaling, transmits a first signaling on the T frequency, and then transfers the service signaling on the X frequency;
s34: after receiving the first signaling, the branch head node FGR transfers the first signaling in the X frequency and changes the receiving time slot in the service parity access method in the super frame from the T frequency to the X frequency, and changes the transmitting time slot from the X frequency to the T frequency;
s35: the branch head node FGR receives traffic signaling at the X frequency and forwards traffic signaling at the T frequency.
As a preferable scheme of the above scheme, after receiving the first signaling that FGR is transferred in the X frequency, the mobile station under the branch 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 branching head node FGR can maintain communication with the branching head node.
As a preferable scheme of the scheme, the node of the main path, the branch head node FGR, the secondary node FSGR and the tertiary node FSR all adopt a parity access method to determine the transmitting and receiving time slots. The parity access method can enable the traffic data on the main path and from the main path to the branches to be transmitted at the highest theoretical speed.
As a preferred solution of the foregoing solution, the parity access method of the node of the main path is determined by setting the LIFE value by the group leader node of the main path, decreasing the LIFE value of the remaining nodes in the main path with increasing distance from the group leader node, and when the LIFE value of one node is odd, the node is an odd access method, otherwise, is an even access method.
As a preferable mode of the above-described scheme, the multiframe format of the branching head node FGR is generated according to the parity access method of the node of the main path that it follows, the multiframe format of the secondary node FSGR is generated according to the parity access method of the branching head node FGR that it follows, and the multiframe format of the tertiary node FSR is generated according to the parity access method of the secondary node FSGR that it follows.
The invention has the advantages that: the receiving and transmitting frequencies of the nodes on the branch paths are adjusted as required, so that the nodes on the branch paths can communicate with the main path nodes and can also maintain the nodes on the branch paths to communicate with the mobile stations below the nodes.
Drawings
A flow chart of the forward transmission method in the embodiment of fig. 1 is shown.
A flow diagram of a method for backward transmission of the branch header node FGR in the embodiment of fig. 2 is shown.
A flow chart of the reverse transmission method of the secondary node FSGR in the embodiment of fig. 3 is shown.
A flow chart of the three-level node FSR reverse transmission method in the embodiment of fig. 4 is shown.
Detailed Description
The technical scheme of the invention is further described below through examples and with reference to the accompanying drawings.
Examples:
the embodiment of the method is used for the service relay between a main path and a branch path, wherein 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, the method comprises a forward transmission method and a reverse transmission method, the forward transmission is used for transmitting information from a main path node to the branch path, and the reverse transmission is used for transmitting information from the branch path node 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 at T frequency;
s02: the branch head node FGR receives the service signaling of the main path at the T frequency and transfers the service signaling at the X frequency, and the mobile station under the branch head node FGR receives the service signaling at the X frequency;
s03: the second-level node FSGR receives and transfers the service signaling transferred by the branch head 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 tertiary node FSR receives and converts the service signaling transferred by the secondary node FSGR at the X frequency, and the mobile station under the tertiary node FSR receives the service signaling at the X frequency.
For the nested branches, the forward transmission method is the same as the method, a first node parallel to the FSR node is also arranged under the secondary node FSGR of the existing branch FGR-FSGR-FSR, the first node is the first node FGR in the nested branches of the branch FGR-FSGR-FSR, the nested branches adopt Y frequencies different from X frequencies and T frequencies, when the main path node transmits information, the steps S01 to S03 are firstly executed to enable the service signaling sent by the main path node to reach the secondary node FSGR for forwarding, then the step S02 is executed by 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 secondary node FSGR reverse transmission method and a tertiary node FSR reverse transmission method. As shown in fig. 2, the method for backward transmission of the branch head node FGR includes the following steps:
s11: a mobile station under a branch head node FGR which is to transmit signaling 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 branch head node FGR transfers the first signaling on the X frequency and changes the receiving time slot in the service parity access method in the super frame from the T frequency to the X frequency, and changes the transmitting time slot from the X frequency to the T frequency;
s13: after receiving the first signaling, the second-level node FSGR changes the receiving time slot in the service parity access method in the super frame from the X frequency to the T frequency, and the transmitting time slot is still the X frequency;
s14: after receiving the first signaling, the mobile station except the signaling to be transmitted under the branch head node FGR changes the receiving time slot in the service parity access method in the super frame from the X frequency to the T frequency;
s15: the mobile station under the branch head node FGR, which is to transmit signaling, transmits traffic signaling at the X frequency. The branch head node FGR transfers the service signaling in the T frequency, and the main path node can receive the reverse service and transfer the reverse service in the main path; FSGR can also receive this traffic signaling on the T frequency and relay it on the X frequency. The FSR node still receives the traffic signaling transferred by the FSGR node at the X frequency, and transfers the traffic signaling at the branched X frequency.
For the nested branches, the reverse transmission method of the nested branch head node FGR is similar to the method, a second node parallel to the FSGR node exists under the branch head node FGR of the existing branch FGR-FSGR-FSR, the second node is the head branch FGR in the nested branch of the branch FGR-FSGR-FSR, the nested branch adopts Y1 frequency different from X frequency and T frequency, when a mobile station under the second node needs to transmit service signaling, the steps S11 to S15 are firstly executed, but the T frequency in the steps S11 to S15 is replaced by X frequency, the X frequency is replaced by Y1 frequency, after the execution, the service signaling can be received by the branch head node FGR, and then, the steps S11 to S15 are executed again so that the branch head node can transfer the service signaling to the main node and the whole network.
As shown in fig. 3, the secondary node FSGR reverse transmission method includes the steps of:
s21: a mobile station under a secondary node FSGR transmits service signaling on an X frequency;
s22: the second node FSGR temporarily stores the service signaling, transmits a first signaling on the T frequency, and then transfers the service signaling on the X frequency;
s23: after receiving the first signaling, the branch head node FGR transfers the first signaling in the X frequency and changes the receiving time slot in the service parity access method in the super frame from the T frequency to the X frequency, and changes the transmitting time slot from the X frequency to the T frequency; after receiving the first signaling of FGR transferring in X frequency, the mobile station in branch head node FGR changes the receiving time slot in the service parity access method in super frame from X frequency to T frequency.
S24: the branch head node FGR receives service signaling at the X frequency and transfers the service signaling at the T frequency; enabling the primary path node to receive the traffic information.
S25: the tertiary node FSR receives and forwards traffic signaling at the X frequency.
For the nested branches, the reverse transmission method of the secondary node FSGR of the nested branches is similar to the method, a nested branch exists under the secondary node FSGR of the existing branch FGR-FSGR-FSR, the structure of the nested branches is assumed to be FGR-FSGR, the nested branches adopt Y frequencies different from X frequencies and T frequencies, when a mobile station under the FSGR in the nested branches needs to transmit service signaling, the steps S21 to S24 are firstly executed, but the attention is paid to the fact that the T frequency in the steps S21 to S24 is replaced by the X frequency, the X frequency is replaced by the Y frequency, after the execution, the service signaling can be received by the superior node FSGR, and then the steps S21 to S25 are executed again to transfer the service signaling to the main node and the whole network.
As shown in fig. 4, the three-level node FSR reverse transmission method includes the steps of:
s31: a mobile station under the FSR of the three-level node transmits service signaling on the X frequency;
s32: the three-level node FSR transfers the service signaling in the X frequency;
s33: the second node FSGR temporarily stores the service signaling, transmits a first signaling on the T frequency, and then transfers the service signaling on the X frequency;
s34: after receiving the first signaling, the branch head node FGR transfers the first signaling in the X frequency and changes the receiving time slot in the service parity access method in the super frame from the T frequency to the X frequency, and changes the transmitting time slot from the X frequency to the T frequency; after receiving the first signaling of FGR transferring in X frequency, the mobile station in branch head node FGR changes the receiving time slot in the service parity access method in super frame from X frequency to T frequency.
S35: the branch head node FGR receives traffic signaling at the X frequency and forwards traffic signaling at the T frequency. Enabling the primary path node to receive the traffic information.
For the nested branches, the three-level node FSR reverse transmission method of the nested branches is similar to the method, a nested branch exists under the three-level node FSR of the existing branch FGR-FSGR-FSR, the structure of the nested branches is assumed to be FGR-FSGR-FSR, the nested branches adopt Y2 frequencies different from X frequencies and T frequencies, when a mobile station under the FSR in the nested branches needs to transmit service signaling, the steps S31 to S35 are firstly executed, but note that when the steps S31 to S35 are executed, the T frequency in the steps is replaced by X frequencies, the X frequency is replaced by Y2 frequencies, after the execution, the service signaling can be received by an upper-level node FSR, and then, a step S31 to S35 are executed again so that the branch head node can transfer the service signaling to a main node.
In this embodiment, the node of the main path, the branch head node FGR, the secondary node FSGR and the tertiary node FSR all adopt the parity access method to determine the transmitting and receiving time slot, the parity access method of the node of the main path is determined by the following method, the group length node of the main path sets the LIFE value, the LIFE values of the other nodes in the main path decrease with increasing distance from the group length node, when the LIFE value of one node is odd, the node is the odd access method, 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 multi-frame format of the secondary node FSGR, the multi-frame format of the branch head node FGR is generated according to the parity access method of the branch head node FGR followed by the multi-frame format of the tertiary 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 multi-frame format of the tertiary node FSGR.
Taking the branching head node FGR as an example, if the upper node followed by the branching head node FGR is a main path node and uses an even access method, the access method of the branching head node FGR is odd access, the superframe format of the branching head node is C0, C1, T0, X1, T2, X3, T4, X5, T6, X7, T8, X9, T10, X11, T12, X13, T14, X15, that is, the service reception is the frequency and the time slot specified by T0, T2, T4, T6, T8, T10, T12, T14 of the upper main path node, and the service transmission is the frequency and the time slot specified by X1, X3, X5, X7, X9, X11, X13 of the present branch. If the following upper node is the main path node and the odd access method is used, the FGR access method is the even access, the superframe format is C0, C1, X0, T1, X2, T3, X4, T5, X6, T7, X8, T9, X10, T11, X12, T13, X14, T15, i.e. the service reception at standby is the frequency and time slot defined by T1, T3, T5, T7, T9, T11, T13, T15 using the upper main path node, and the service transmission is the frequency and time slot defined by X2, X4, X6, X8, X10, X12, X14 using the present branch.
The specific embodiments described herein are offered by way of example only to illustrate the spirit of the invention. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.
Claims (8)
1. A TDMA wireless ad hoc network forking service relay method is used for service relay between a main path and a branch path, wherein 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, and the service frequency of the branch path is X frequency, and 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 of:
s01: the main path node transmits service signaling at T frequency;
s02: the branch head node FGR receives the service signaling of the main path at the T frequency and transfers the service signaling at the X frequency, and the mobile station under the branch head node FGR receives the service signaling at the X frequency;
s03: the second-level node FSGR receives and transfers the service signaling transferred by the branch head 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 reverse transmission method comprises a branch head node FGR reverse transmission method, a secondary node FSGR reverse transmission method and a tertiary node FSR reverse transmission method;
the branch head node FGR reverse transmission method comprises the following steps: a mobile station under a branch head node FGR which is to transmit signaling 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; the branch head node FGR transfers the first signaling on the X frequency and changes the receiving time slot in the service parity access method in the super frame from the T frequency to the X frequency, and changes the transmitting time slot from the X frequency to the T frequency; after receiving the first signaling, the second-level node FSGR changes the receiving time slot in the service parity access method in the super frame from the X frequency to the T frequency; after receiving the first signaling, the mobile station except the signaling to be transmitted under the branch head node FGR changes the receiving time slot in the service parity access method in the super frame from the X frequency to the T frequency; the mobile station under the branch head node FGR, which is to transmit signaling, transmits traffic signaling at the X frequency.
2. The method for relaying forking service of TDMA wireless ad hoc network according to claim 1, wherein: the branch head node FGR reverse transmission method comprises the following steps:
s11: a mobile station under a branch head node FGR which is to transmit signaling 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 branch head node FGR transfers the first signaling on the X frequency and changes the receiving time slot in the service parity access method in the super frame from the T frequency to the X frequency, and changes the transmitting time slot from the X frequency to the T frequency;
s13: after receiving the first signaling, the second-level node FSGR changes the receiving time slot in the service parity access method in the super frame 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 branch head node FGR changes the receiving time slot in the service parity access method in the super frame from the X frequency to the T frequency;
s15: the mobile station under the branch head node FGR, which is to transmit signaling, transmits traffic signaling at the X frequency.
3. The method for relaying forking service of TDMA wireless ad hoc network according to claim 2, wherein: the reverse transmission method of the secondary node FSGR comprises the following steps:
s21: a mobile station under a secondary node FSGR transmits service signaling on an X frequency;
s22: the second node FSGR temporarily stores the service signaling, transmits a first signaling on the T frequency, and then transfers the service signaling on the X frequency;
s23: after receiving the first signaling, the branch head node FGR transfers the first signaling in the X frequency and changes the receiving time slot in the service parity access method in the super frame from the T frequency to the X frequency, and changes the transmitting time slot from the X frequency to the T frequency;
s24: the branch head node FGR receives service signaling at the X frequency and transfers the service signaling at the T frequency;
s25: the tertiary node FSR receives and forwards traffic signaling at the X frequency.
4. The method for relaying forking service of TDMA wireless ad hoc network according to claim 2, wherein: the three-level node FSR reverse transmission method comprises the following steps:
s31: a mobile station under the FSR of the three-level node transmits service signaling on the X frequency;
s32: the three-level node FSR transfers the service signaling in the X frequency;
s33: the second node FSGR temporarily stores the service signaling, transmits a first signaling on the T frequency, and then transfers the service signaling on the X frequency;
s34: after receiving the first signaling, the branch head node FGR transfers the first signaling in the X frequency and changes the receiving time slot in the service parity access method in the super frame from the T frequency to the X frequency, and changes the transmitting time slot from the X frequency to the T frequency;
s35: the branch head node FGR receives traffic signaling at the X frequency and forwards traffic signaling at the T frequency.
5. A TDMA wireless ad hoc network forking service relay method according to claim 3 or wherein: after receiving the first signaling of FGR transferring in X frequency, the mobile station in branch head node FGR changes the receiving time slot in the service parity access method in super frame from X frequency to T frequency.
6. The method for relaying a forked service of a TDMA wireless ad hoc network according to claim 1 or 5, wherein: the nodes of the main path, the branch head node FGR, the secondary node FSGR and the tertiary node FSR all adopt a parity access method to determine transmitting and receiving time slots.
7. The method for repeating the forking service of the TDMA wireless ad hoc network according to claim 6, wherein the method comprises the steps of: the parity access method of the nodes of the main path is determined by the following method that the LIFE value is set by the group leader node of the main path, the LIFE values of other nodes in the main path decrease along with the increase of the distance between the nodes of the group leader, when the LIFE value of one node is odd, the node is an odd access method, and otherwise, the node is an even access method.
8. The method for repeating the forking service of the TDMA wireless ad hoc network according to claim 6, wherein the method comprises the steps of: 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 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 multi-frame format of the tertiary 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 multi-frame format of the tertiary node FSR.
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| WO2015012970A2 (en) * | 2013-06-14 | 2015-01-29 | Arizona Board Of Regents On Behalf Of Arizona State University | Underwater multi-hop communications network |
| CN105246079A (en) * | 2015-10-27 | 2016-01-13 | 广州海格通信集团股份有限公司 | Radio smart sensing network design method based on TDMA |
| 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 |
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