CN113543260A - TDMA wireless ad hoc network service rapid relay routing information transmission method - Google Patents
TDMA wireless ad hoc network service rapid relay routing information transmission method Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04W40/00—Communication routing or communication path finding
- H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W40/00—Communication routing or communication path finding
- H04W40/24—Connectivity information management, e.g. connectivity discovery or connectivity update
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04W84/18—Self-organising networks, e.g. ad-hoc networks or sensor networks
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Abstract
The invention relates to a method for transmitting TDMA wireless ad hoc network service fast relay route information, which comprises the following steps: defining a synchronous word; encoding the routing information; the mobile station rewrites the data burst frame to generate a fast relay burst frame and transmits the fast relay burst frame; the relay station receives and partially analyzes the fast relay burst frame to obtain routing information; the relay station judges whether to forward according to the route, if so, a rapid relay burst frame is generated and forwarded at the next time slot of the received rapid relay burst frame; if not, the fast relay burst frame is completely analyzed. The invention has the advantages that: the routing information is written into the data type field of the data burst frame, so that the relay station can acquire the routing information of the burst frame under the condition that the burst frame is not completely received, the routing information can be directly forwarded in the next time slot after the burst frame is completely received, and the forwarding delay is low.
Description
Technical Field
The invention relates to the wireless field, in particular to a TDMA wireless ad hoc network service rapid relay system and a method.
Background
In some special occasions, such as the field, a cave, a tunnel, a basement and the like, base station signals are not available or base stations are not easy to erect, and at the moment, the ad hoc network technology can expand 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.
When long-distance transmission is carried out, multiple times of ad hoc network hopping is needed, each time of hopping generates certain delay for data transmission, the number of the hopping times is too many, and delay indexes are unacceptable, in a DMR/PDT standard, an air wireless transmission standard is a TDMA transmission mode with 1 frame and 60ms and 2 time slots (each 30ms), and the shortest transmission delay is 90ms (30ms receiving time plus operation processing time). At 15 hops, the pilot frequency transmission delay is 60ms × 15 — 900ms, and the common frequency transmission delay is 90ms × 15 — 1350ms, which greatly affects the call experience.
Disclosure of Invention
The invention mainly solves the problem of large data transmission delay in the traditional TDMA wireless ad hoc network scheme, and provides a method for transmitting the TDMA wireless ad hoc network service rapid relay route information, which ensures that a relay station can complete the operation processing of the routing information in one time slot and transmit in the adjacent time slot by shortening the transmission and analysis time of the route information.
The technical scheme adopted by the invention for solving the technical problem is that the method for transmitting the rapid relay routing information of the TDMA wireless ad hoc network service is realized based on a data burst frame in a DMR/PDT standard, the data burst frame structure comprises a first load section, a first data type section, a synchronous or embedded signaling domain, a second data type section and a second load section, the TDMA wireless ad hoc network comprises a mobile station and a transit station, and the method comprises the following steps:
s1: defining a synchronous word;
s2: encoding the routing information;
s3: the mobile station rewrites the data burst frame to generate a fast relay burst frame and transmits the fast relay burst frame;
s4: the relay station receives and partially analyzes the fast relay burst frame to obtain routing information;
s5: the relay station judges whether to forward according to the route, if so, a rapid relay burst frame is generated and forwarded at the next time slot of the received rapid relay burst frame; if not, the fast relay burst frame is completely analyzed.
The routing information is used for replacing the contents in the first data type section and the second data type section in the data burst frame, so that the relay station can quickly acquire the routing information of the quick relay burst frame, the quick transmission of the routing information is realized, the forwarding speed of the data is improved, and the time delay is reduced.
As a preferable solution of the foregoing solution, the synchronization word includes a mobile station fast preamble signaling frame synchronization word, a mobile station fast speech header frame synchronization word, a mobile station fast speech trailer frame synchronization word, a relay station fast preamble signaling frame synchronization word, a relay station fast speech header frame synchronization word, and a relay station fast speech trailer frame synchronization word. The synchronization word is used for replacing the contents of the first data type segment and the second data type segment in the data burst frame, so that the transfer station can distinguish the burst frame types conveniently.
As a preferable mode of the above, overwriting the data burst frame in step S3 includes the steps of:
s31: replacing the contents of the first data type segment and the second data type segment of the data burst frame by the compiled routing information;
s32: the defined sync word is written into the first payload segment and the second payload segment. The analysis of the delayed data type enables the relay station to directly acquire the routing information after receiving part of the burst frame, and the relay station can complete the receiving of the burst frame and the acquisition of the routing information in one time slot, so that the relay station can forward in the next time slot, and the forwarding delay is shortened.
As a preferable solution of the above solution, the routing information includes mobile station routing information and relay station routing information, and the mobile station routing information includes a transmitting party source address and a target relay station address; the relay station routing information comprises a transmitting source address, a transmission direction and a time slot position of relay transmission of the next reverse relay station.
As a preferable scheme of the foregoing scheme, in step S3, when the mobile station transmits the fast relay burst frame, it first detects whether the channel is idle, and if the channel is busy, the transmission is delayed; if the channel is idle, the nearest time slot is selected for transmission. The mobile station selects the nearest time slot to transmit when the channel is idle, thereby shortening the time delay of data transmission between the mobile station and the relay station.
As a preferable example of the above, in step S4, when the relay node performs partial analysis, the first data type segment and the second data type segment are analyzed.
As a preferable example of the foregoing scheme, in step S3, when the relay station performs full parsing in step S4, the relay station determines the data type of the fast relay burst frame by parsing the synchronization word added to the first payload segment and the second payload segment.
The invention has the advantages that: the routing information is written into the data type field of the data burst frame, so that the relay station can acquire the routing information of the burst frame under the condition that the burst frame is not completely received, the routing information can be directly forwarded in the next time slot after the burst frame is completely received, and the forwarding delay is low.
Drawings
Fig. 1 is a schematic flow chart of a TDMA wireless ad hoc network service fast relay routing information transmission method in the embodiment.
FIG. 2 is a diagram illustrating an exemplary structure of a data burst frame in the DMR/PDT protocol.
Fig. 3 is a schematic flow chart of rewriting a data burst frame 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):
in this embodiment, a TDMA wireless ad hoc network service fast relay routing information transmission method includes a mobile station and a transit station, as shown in fig. 1, and includes the following steps:
s1: defining a synchronous word; the transmission method of the TDMA wireless ad hoc network service fast relay routing information is realized based on a data burst frame in a DMR/PDT standard, the data burst frame structure is shown in figure 2 and comprises a first load section, a first data type section, a synchronous or embedded signaling domain, a second data type section and a second load section, and defined synchronous words are used for replacing bytes in the first data type section and the second data type section and used for indicating the type of the burst frame. In the fast relay service, the related air interface signaling comprises a preamble, a voice head (single call/group call), a voice embedded signaling and a voice tail, and the corresponding synchronous words comprise a mobile station fast preamble signaling frame synchronous word, a mobile station fast voice head frame synchronous word, a mobile station fast voice tail frame synchronous word, a transfer platform fast preamble signaling frame synchronous word, a transfer platform fast voice head frame synchronous word and a transfer platform fast voice tail frame synchronous word; for "speech embedded signaling" a distinction is made between undefined sync words.
S2: encoding routing information, wherein the routing information comprises mobile station routing information and relay station routing information, and the mobile station routing information comprises a transmitting party source address and a target relay station address; the relay station routing information comprises a transmitting source address, a transmission direction and a time slot position of relay transmission of the next reverse relay station; in the data burst frame, the first data type segment and the second data type segment are 10 bits each, and the effective content in the 20 bits is 8 bits, so that the routing information needs to be compressed into only 8 bits when the routing information is encoded, in this embodiment, for the mobile station, the first 4 bits are the source address of the transmitting party, and the last 4 bits are the target relay station address; for the relay station, the first 4 bits are the source address of the transmitting party, and the last 4 bits are the slot positions of the relay transmission in the transmission direction (forward, reverse and bidirectional) and the next reverse relay station.
S3: the mobile station rewrites the data burst frame to generate a fast relay burst frame and transmits the fast relay burst frame, when the mobile station transmits the fast relay burst frame, whether a channel is idle is detected firstly, and if the channel is busy, the transmission is delayed; if the channel is idle, the nearest time slot is selected for transmission. As shown in fig. 3, overwriting a data burst frame comprises the steps of:
s31: replacing the contents of the first data type segment and the second data type segment of the data burst frame by the compiled routing information;
s32: and writing the defined synchronous words into the first load segment and the second load segment, specifically rewriting the structures of a voice head (single call/group call) and a voice tail FLC signaling in the first load segment and the second load segment. The original signaling with the length of 72 bits is changed into 80 bits, and a unified structure is kept with the signaling of a preamble;
s4: the relay station receives and partially analyzes the fast relay burst frame to obtain routing information; when the relay station performs partial analysis, the first data type segment and the second data type segment are analyzed, namely after the relay station receives and completes the second data segment, the first data segment and the second data segment are analyzed by utilizing the time of 10ms required by the transmission of the second load segment, so that the relay station can know whether the fast relay burst frame needs to be forwarded and the forwarding direction of the fast relay burst frame while completing the reception of the fast relay burst frame.
S5: the relay station judges whether to forward according to the routing information, if so, a rapid relay burst frame is generated and forwarded at the next time slot of the received rapid relay burst frame, the delay of one-time forwarding is 30ms, and compared with the 90ms delay of the traditional ad hoc network scheme, the delay is shortened by 60 ms; if not, the fast relay burst frame is completely analyzed, and the data type of the fast relay burst frame is confirmed by the synchronous words added in the second load segment of the first load segment box.
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 (7)
1. A TDMA wireless self-organized network service fast relay route information transmission method is realized based on data burst frame in DMR/PDT standard, the data burst frame structure includes a first load section, a first data type section, a synchronous or embedded signaling domain, a second data type section and a second load section, the TDMA wireless self-organized network includes a mobile station and a transfer platform, which is characterized in that: the method comprises the following steps:
s1: defining a synchronous word;
s2: encoding the routing information;
s3: the mobile station rewrites the data burst frame to generate a fast relay burst frame and transmits the fast relay burst frame;
s4: the relay station receives and partially analyzes the fast relay burst frame to obtain routing information;
s5: the relay station judges whether to forward according to the route, if so, a rapid relay burst frame is generated and forwarded at the next time slot of the received rapid relay burst frame; if not, the fast relay burst frame is completely analyzed.
2. The method for transmitting the fast relay route information of the TDMA wireless ad hoc network service according to claim 1, wherein: the synchronization words include mobile station fast preamble signaling frame synchronization words, mobile station fast speech header frame synchronization words, mobile station fast speech trailer synchronization words, transfer station fast preamble signaling frame synchronization words, transfer station fast speech header frame synchronization words, and transfer station fast speech trailer synchronization words.
3. The method for transmitting the fast relay route information of the TDMA wireless ad hoc network service according to claim 1, wherein: rewriting the data burst frame in step S3 includes the steps of:
s31: replacing the contents of the first data type segment and the second data type segment of the data burst frame by the compiled routing information;
s32: the defined sync word is written into the first payload segment and the second payload segment.
4. The method for transmitting the fast relay route information of the TDMA wireless ad hoc network service according to the claim 1 or 3, wherein: the routing information comprises mobile station routing information and transfer station routing information, and the mobile station routing information comprises a transmitting party source address and a target transfer station address; the relay station routing information comprises a transmitting source address, a transmission direction and a time slot position of relay transmission of the next reverse relay station.
5. The method for transmitting the fast relay route information of the TDMA wireless ad hoc network service according to claim 3, wherein: in step S3, when the mobile station transmits the fast relay burst frame, it first detects whether the channel is idle, and if the channel is busy, the transmission is delayed; if the channel is idle, the nearest time slot is selected for transmission.
6. The method for transmitting the fast relay route information of the TDMA wireless ad hoc network service according to claim 1, wherein: in step S4, when the relay station performs partial analysis, the first data type segment and the second data type segment are analyzed.
7. The method for transmitting the fast relay route information of the TDMA wireless ad hoc network service according to claim 3, wherein: in step S5, when the relay station performs full parsing, the relay station determines the data type of the fast relay burst frame by parsing the synchronization word added in the first payload section and the second payload section.
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| JP2018148497A (en) * | 2017-03-08 | 2018-09-20 | 株式会社国際電気通信基礎技術研究所 | Radio relay device and radio relay method |
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2020
- 2020-04-14 CN CN202010291027.6A patent/CN113543260A/en active Pending
Patent Citations (7)
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| JP2001196990A (en) * | 1999-11-01 | 2001-07-19 | Matsushita Electric Ind Co Ltd | Relay transmission method, relay transmission system and device used for them |
| US20040077345A1 (en) * | 2002-08-02 | 2004-04-22 | Turner R. Brough | Methods and apparatus for network signal aggregation and bandwidth reduction |
| CN105592077A (en) * | 2011-05-19 | 2016-05-18 | 福建联拓科技有限公司 | Voice transmission method |
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