CN106385708B - Data transmission method and wireless link machine - Google Patents
Data transmission method and wireless link machine Download PDFInfo
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- CN106385708B CN106385708B CN201610821240.7A CN201610821240A CN106385708B CN 106385708 B CN106385708 B CN 106385708B CN 201610821240 A CN201610821240 A CN 201610821240A CN 106385708 B CN106385708 B CN 106385708B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/53—Allocation or scheduling criteria for wireless resources based on regulatory allocation policies
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0037—Inter-user or inter-terminal allocation
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Abstract
The invention provides a data transmission method, which is applied to a wireless link machine, wherein the wireless link machine sets a plurality of data transmission channels in a system communication link and stores the data transmission channels in a data transmission channel multiplexing periodic table according to the sequence; the method comprises the following steps: receiving data transmitted in a system communication link; identifying a data transmission channel receiving the data; according to the data transmission channel for receiving the data, setting the next data transmission channel of the data transmission channel for receiving the data in the data transmission channel multiplexing periodic table as the data transmission channel for sending the data; and sending the data through the data transmission channel for sending the data. By adopting the technical scheme of the invention, the plurality of wireless link machines occupy the channels to transmit data according to the set sequence without mutual interference, thereby meeting the requirement of multistage extension coverage.
Description
Technical Field
The present invention relates to the field of wireless communication technologies, and in particular, to a data transmission method and a wireless link machine.
Background
The PDT (Police Digital Trunking) standard is based on meeting the public security Police requirements, and its application range gradually expands to other industries, and has gradually become one of the mainstream Digital Trunking standards in the world. In the scenes that the geographic environments such as anti-terrorism, disaster relief, forestry and highways are complex and various blind areas are easy to appear in common wireless coverage, an ad hoc link extension coverage system needs to be constructed by using a PDT standard, so that a perfect emergency solution is realized.
At present, a conventional service and a link system transmission frequency point of a PDT standard are fixed, and when a self-organizing link extension coverage system is constructed, a time division duplex mode is adopted on the fixed transmission frequency point, and two time slots are used for alternately transmitting data, that is, a first node transmits data on the fixed transmission frequency point by using a first time slot, and a second node transmits data on the fixed transmission frequency point by using a second time slot, so that extension is realized. When the current PDT standard constructs an ad hoc link extension coverage system, the wireless link machine has single transmission frequency point and cannot meet the requirement of multistage extension coverage.
Disclosure of Invention
Based on the defects and shortcomings of the prior art, the invention provides a data transmission method and a wireless link machine, so that the wireless link machine can meet the requirement of multistage extending coverage when constructing an ad hoc link extending coverage system.
A data transmission method is applied to a wireless link machine, the wireless link machine sets a plurality of data transmission channels in a system communication link and stores identification information of the data transmission channels in a data transmission channel multiplexing periodic table according to a set sequence; wherein the number of the plurality of data transmission channels is not less than 3; the identification information comprises a receiving and sending frequency point identification and a time slot identification; the method comprises the following steps:
receiving data transmitted in the system communication link;
identifying a data transmission channel receiving the data;
according to the data transmission channel for receiving the data, setting the next data transmission channel of the data transmission channel for receiving the data in the data transmission channel multiplexing periodic table as a data transmission channel for sending the data;
and sending the data through the data transmission channel for sending the data.
Preferably, the setting a plurality of data transmission channels in the system communication link includes:
and respectively setting the first time slots of all the wireless subframes and the second time slots of all the wireless subframes on different set transceiving frequency points in the bandwidth of a system communication link as data transmission channels.
Preferably, the setting, in a system communication link bandwidth, first time slots of all radio subframes and second time slots of all radio subframes on different set transceiving frequency points as data transmission channels respectively includes:
dividing a system communication link bandwidth into a plurality of sub-bandwidths;
respectively setting a transceiving frequency point in each sub-bandwidth;
and respectively setting the first time slots of all the wireless subframes on each transceiving frequency point as a data transmission channel, and respectively setting the second time slots of all the wireless subframes on each transceiving frequency point as a data transmission channel.
Preferably, the identifying a data transmission channel receiving the data comprises:
and identifying the transceiving frequency point and the time slot of the data transmission channel for receiving the data.
Preferably, the storing the identification information of the plurality of data transmission channels in the multiplexing periodic table of the data transmission channels according to a set sequence includes:
and storing the identification information of the plurality of data transmission channels in a multiplexing periodic table of the data transmission channels according to the sequence according to the rule that the time slot identifications in the identification information of the data transmission channels are changed alternately.
Preferably, the setting, as the data transmission channel used for sending the data, the data transmission channel next to the data transmission channel receiving the data in the data transmission channel multiplexing periodic table includes:
and when the data transmission channel for receiving the data is the last data transmission channel stored in the data transmission channel multiplexing periodic table, setting a data transmission channel, which is in the data transmission channel multiplexing periodic table and is before the data transmission channel for receiving the data, is at least separated from the data transmission channel for receiving the data by one data transmission channel and is different from the time slot identifier of the identifier information of the data transmission channel for receiving the data, as a data transmission channel for sending the data.
Preferably, in the multiplexing cycle table of data transmission channels, a data transmission channel that is before the data transmission channel receiving the data, is separated from the data transmission channel receiving the data by at least one data transmission channel, and is different from the slot identifier of the identifier information of the data transmission channel receiving the data, and is set as a data transmission channel for transmitting the data, including:
and setting the first data transmission channel in the data transmission channel multiplexing periodic table as a data transmission channel for sending the data.
A wireless link machine, comprising:
the channel setting and storing unit is used for setting a plurality of data transmission channels in a system communication link and storing the identification information of the data transmission channels in a data transmission channel multiplexing periodic table according to the set sequence; wherein the number of the plurality of data transmission channels is not less than 3; the identification information comprises a receiving and sending frequency point identification and a time slot identification;
a data receiving unit, configured to receive data transmitted in the system communication link;
the identification unit is used for identifying a data transmission channel for receiving the data;
a processing unit, configured to set, according to the data transmission channel that receives the data, a next data transmission channel of the data transmission channel that receives the data in the data transmission channel multiplexing periodic table as a data transmission channel for sending the data;
and the data sending unit is used for sending the data through the data transmission channel for sending the data.
Preferably, when the channel setting and storing unit sets a plurality of data transmission channels in a system communication link, the channel setting and storing unit is specifically configured to:
and respectively setting the first time slots of all the wireless subframes and the second time slots of all the wireless subframes on different set transceiving frequency points in the bandwidth of a system communication link as data transmission channels.
Preferably, the channel setting and storing unit is configured to, when setting first time slots of all radio subframes and second time slots of all radio subframes on different set transceiving frequency points in a system communication link bandwidth as data transmission channels, specifically:
dividing a system communication link bandwidth into a plurality of sub-bandwidths;
respectively setting a transceiving frequency point in each sub-bandwidth;
and respectively setting the first time slots of all the wireless subframes on each transceiving frequency point as a data transmission channel, and respectively setting the second time slots of all the wireless subframes on each transceiving frequency point as a data transmission channel.
Preferably, when the identification unit identifies the data transmission channel receiving the data, the identification unit is specifically configured to:
and identifying the transceiving frequency point and the time slot of the data transmission channel for receiving the data.
Preferably, when the channel setting and storing unit stores the identification information of the plurality of data transmission channels in the data transmission channel multiplexing periodic table according to the set sequence, the channel setting and storing unit is specifically configured to:
and storing the identification information of the plurality of data transmission channels in a multiplexing periodic table of the data transmission channels according to the sequence according to the rule that the time slot identifications in the identification information of the data transmission channels are changed alternately.
Preferably, the setting, by the processing unit, a next data transmission channel of the data transmission channels that receive the data in the data transmission channel multiplexing periodic table as a data transmission channel for transmitting the data includes:
and when the data transmission channel for receiving the data is the last data transmission channel stored in the data transmission channel multiplexing periodic table, setting a data transmission channel, which is in the data transmission channel multiplexing periodic table and is before the data transmission channel for receiving the data, is at least separated from the data transmission channel for receiving the data by one data transmission channel and is different from the time slot identifier of the identifier information of the data transmission channel for receiving the data, as a data transmission channel for sending the data.
Preferably, when the processing unit sets, in the data transmission channel multiplexing periodic table, a data transmission channel that is before the data transmission channel receiving the data, is separated from the data transmission channel receiving the data by at least one data transmission channel, and is different from the time slot identifier of the identifier information of the data transmission channel receiving the data, as a data transmission channel used for sending the data, the processing unit is specifically configured to:
and setting the first data transmission channel in the data transmission channel multiplexing periodic table as a data transmission channel for sending the data.
A wireless link machine, comprising:
a processor, a memory, a data receiver and a data transmitter;
the data receiver is connected with the processor and used for receiving data transmitted in a system communication link;
the memory is connected with the processor and is used for storing programs and data generated in the process of program operation;
the processor is used for realizing the following functions by running the program in the memory:
setting a plurality of data transmission channels in a system communication link, and storing identification information of the plurality of data transmission channels in a data transmission channel multiplexing periodic table according to a set sequence; wherein the number of the plurality of data transmission channels is not less than 3; the identification information comprises a receiving and sending frequency point identification and a time slot identification; identifying a data transmission channel on which the data receiver receives the data; according to the data transmission channel for receiving the data, setting the next data transmission channel of the data transmission channel for receiving the data in the data transmission channel multiplexing periodic table as a data transmission channel for sending the data;
the data transmitter is connected with the processor and used for transmitting the data through a data transmission channel which is set by the processor and used for transmitting the data.
Preferably, when the processor sets a plurality of data transmission channels in the system communication link, the processor is specifically configured to:
and respectively setting the first time slots of all the wireless subframes and the second time slots of all the wireless subframes on different set transceiving frequency points in the bandwidth of a system communication link as data transmission channels.
Preferably, the processor is specifically configured to, when the first time slots of all the radio subframes and the second time slots of all the radio subframes on different set transceiving frequency points in the bandwidth of the system communication link are respectively set as data transmission channels:
dividing a system communication link bandwidth into a plurality of sub-bandwidths;
respectively setting a transceiving frequency point in each sub-bandwidth;
and respectively setting the first time slots of all the wireless subframes on each transceiving frequency point as a data transmission channel, and respectively setting the second time slots of all the wireless subframes on each transceiving frequency point as a data transmission channel.
Preferably, when the processor identifies the data transmission channel through which the data receiver receives the data, the processor is specifically configured to:
and identifying the transceiving frequency point and the time slot of the data transmission channel for receiving the data by the data receiver.
Preferably, when the processor stores the identification information of the plurality of data transmission channels in the data transmission channel multiplexing periodic table of the memory according to the set sequence, the processor is specifically configured to:
and storing the identification information of the plurality of data transmission channels in a data transmission channel multiplexing periodic table of the memory according to the sequence according to the rule that the time slot identifications in the identification information of the data transmission channels are changed alternately.
Preferably, when the processor sets the next data transmission channel of the data transmission channel receiving the data in the data transmission channel multiplexing periodic table as the data transmission channel for sending the data, the processor is specifically configured to:
and when the data transmission channel for receiving the data is the last data transmission channel stored in the data transmission channel multiplexing periodic table, setting a data transmission channel, which is in the data transmission channel multiplexing periodic table and is before the data transmission channel for receiving the data, is at least separated from the data transmission channel for receiving the data by one data transmission channel and is different from the time slot identifier of the identifier information of the data transmission channel for receiving the data, as a data transmission channel for sending the data.
Preferably, when the processor sets, in the data transmission channel multiplexing periodic table, a data transmission channel that is before the data transmission channel receiving the data, is separated from the data transmission channel receiving the data by at least one data transmission channel, and is different from the time slot identifier of the identifier information of the data transmission channel receiving the data, as the data transmission channel used for sending the data, the processor is specifically configured to:
and setting the first data transmission channel in the data transmission channel multiplexing periodic table as a data transmission channel for sending the data.
The data transmission method provided by the invention is applied to a wireless link machine, wherein the wireless link machine sets a plurality of data transmission channels in a system communication link and stores identification information of the data transmission channels in a data transmission channel multiplexing periodic table according to the sequence; after receiving data in a system communication link, the wireless link machine identifies a data transmission channel for receiving the data; then according to the data transmission channel for receiving the data, setting the next data transmission channel of the data transmission channel for receiving the data in the data transmission channel multiplexing periodic table as a data transmission channel for sending the data; and sending the data through the data transmission channel for sending the data. In the technical scheme of the invention, the wireless link machine divides the communication link into a plurality of data transmission channels, and the plurality of wireless link machines occupy the channels according to the set sequence to transmit data without mutual interference, thereby meeting the requirement of multistage extension coverage.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic flow chart of a data transmission method according to an embodiment of the present invention;
fig. 2 is a schematic flow chart of a wireless link machine according to an embodiment of the present invention for setting a plurality of data transmission channels in a system communication link;
fig. 3 is a schematic diagram illustrating a multiplexing rule of data transmission channels according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a hybrid wireless link machine networking provided by an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a wireless link machine according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of another wireless link machine according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the invention discloses a data transmission method, which is applied to a wireless link machine, wherein the wireless link machine sets a plurality of data transmission channels in a system communication link and stores identification information of the data transmission channels in a data transmission channel multiplexing periodic table according to a set sequence; wherein the number of the plurality of data transmission channels is not less than 3; the identification information comprises a receiving and sending frequency point identification and a time slot identification; referring to fig. 1, the method includes:
s101, receiving data transmitted in the system communication link;
specifically, the wireless link machine transmits and receives data in the system communication link through a preset data transmission channel. And the data transmitted in the communication link of the receiving system represents that the wireless link machine receives the data in the plurality of data transmission channels. The data may be data transmitted by a user side, data transmitted by a base station, or data transmitted by another wireless link machine. Since one wireless link machine can only occupy one data transmission channel for transmitting information, the wireless link machine receives data in one data transmission channel, that is, the wireless link machine receives data transmitted in a system communication link by the wireless link machine, a user terminal or a base station occupying the data transmission channel for transmitting data.
It should be noted that the bandwidth of the police digital trunking system in the prior art is 12.5k, and the bandwidth of the system communication link according to the embodiment of the present invention is not limited to the bandwidth in the prior art, but may be expanded according to the use requirement. For example, the system communication link bandwidth in the embodiment of the present invention may be 25k, which is equivalent to the bandwidth of two police digital trunking systems in the prior art. Further, a larger bandwidth may be set as a system communication link as required or allowed by conditions.
S102, identifying a data transmission channel for receiving the data;
specifically, in order to achieve the purpose that the next radio link does not interfere with the previous radio link for receiving and sending data information, it is required to ensure that the next radio link and the previous radio link occupy different data transmission channels for sending data. Before the wireless link machine receives data in the system communication link and sends the data out, the wireless link machine needs to firstly know which data transmission channel the data is received from, so as to select another data transmission channel to send the data, wherein the other data transmission channel is different from the data transmission channel receiving the data.
Specifically, the wireless link device is set according to the transmitting and receiving frequency point and the time slot when setting the data transmission channel. Similarly, the wireless link machine respectively identifies each data transmission channel by the frequency point and the time slot of each data transmission channel according to the difference of the frequency point and the time slot of each data transmission channel, and then stores the identification information of all the data transmission channels into the multiplexing periodic table of the data transmission channels according to the sequence. The wireless link machine can determine the data received through which data transmission channel by identifying the frequency point and the time slot for receiving the data.
S103, according to the data transmission channel for receiving the data, setting the next data transmission channel of the data transmission channel for receiving the data in the data transmission channel multiplexing periodic table as a data transmission channel for sending the data;
specifically, the same data transmission channel multiplexing cycle table is stored in each radio link machine. And the identification information of all the data transmission channels in the system communication link is stored in the data transmission channel multiplexing periodic table according to the sequence. After identifying the data transmission channel for receiving the data, each wireless link machine finds the data transmission channel for receiving the data from the data transmission channel multiplexing periodic table, and then takes the next data transmission channel of the data transmission channel for receiving the data as the data transmission channel for sending the data. All the wireless link machines select the data transmission channels for sending data according to the method of the embodiment of the invention, so that the effect that all the wireless link machines occupy the data transmission channels in order is achieved, and interference among the wireless link machines can not be generated. The more the number of the plurality of data transmission channels is, the larger the space for the wireless link machine to select the data transmission channels is when the wireless link machine is extended and covered, and the requirement of the wireless link machine on diversified selection of the extended links is met. And because the number of the data transmission channels is multiple (more than 3), the space of the data transmission channel selected by the wireless link machine is large, the interference between the adjacent wireless link machines can be avoided, and the purpose of realizing the infinite extension coverage of the wireless link machine is facilitated.
When a plurality of radio link devices construct an ad hoc link extended coverage system by using a star networking or a hybrid networking, a situation may occur in which a certain radio link device simultaneously receives data transmitted by a plurality of other radio link devices occupying a plurality of adjacent data transmission channels. At this time, when the wireless link device selects a data transmission channel for transmitting the received data, it is further considered to select a data transmission channel that is not occupied by the previous wireless link device. That is, on the premise that an unoccupied data transmission channel is selected, a data transmission channel next to the data transmission channel that receives data is selected as the data transmission channel that transmits data.
And S104, sending the data through the data transmission channel for sending the data.
Obviously, the data transmission channel for the wireless link machine to send data is selected from the data transmission channel multiplexing period table according to a certain rule, so that the data transmission channels for the wireless link machine to send data are not repeated in one multiplexing period of all the data transmission channels, that is, signals sent by the wireless link machine do not generate mutual interference, and multi-stage extension coverage of the wireless link machine is realized.
The data transmission method provided by the invention is applied to a wireless link machine, wherein the wireless link machine sets a plurality of data transmission channels in a system communication link and stores the plurality of data transmission channels in a data transmission channel multiplexing periodic table according to the sequence; after receiving data in a system communication link, the wireless link machine identifies a data transmission channel for receiving the data; then according to the data transmission channel for receiving the data, setting the next data transmission channel of the data transmission channel for receiving the data in the data transmission channel multiplexing periodic table as a data transmission channel for sending the data; and sending the data through the data transmission channel for sending the data. In the technical scheme of the invention, the wireless link machine divides the communication link into a plurality of data transmission channels, and the plurality of wireless link machines occupy the channels according to the set sequence to transmit data without mutual interference, thereby meeting the requirement of multistage extension coverage.
Optionally, in another embodiment of the present invention, the setting a plurality of data transmission channels in a system communication link includes:
and respectively setting the first time slots of all the wireless subframes and the second time slots of all the wireless subframes on different set transceiving frequency points in the bandwidth of a system communication link as data transmission channels.
Specifically, the embodiment of the invention sets a plurality of different transceiving frequency points in the system communication link bandwidth, and breaks the limitation of single transceiving frequency point in the traditional technical scheme. On each different transceiving frequency point, the first time slot and the second time slot of all the wireless subframes are respectively set as data transmission channels, so that the diversification of the data transmission channels is realized, a larger selection space is provided for the wireless link machine to select the extension link, and the diversified selection requirements of the wireless link machine on the extension link can be met. Furthermore, because the data transmission channels selected by different wireless link machines are different, interference cannot be generated between the different wireless link machines, and multi-stage extension coverage can be realized.
It should be noted that, when the wireless sub-frame in the system communication link occupied by the wireless link machine has multiple time slots, according to the processing method of the technical scheme of the embodiment of the present invention, the same time slot of all the wireless sub-frames on the set transceiving frequency point is set as one data transmission channel, so as to obtain multiple data transmission channels for the wireless link machine to reuse. For example, if there are N time slots in the radio subframe in the system communication link, the 1 st time slot of all radio subframes on the set transceiving frequency point and the nth time slot of all radio subframes of the 2 nd time slot … of all radio subframes are set as one data transmission channel, respectively, so as to obtain a plurality of data transmission channels.
Optionally, in another embodiment of the present invention, the setting, in a bandwidth of a system communication link, first time slots of all radio subframes and second time slots of all radio subframes on different set transceiving frequency points as data transmission channels respectively is described, referring to fig. 2, and includes:
s201, dividing a system communication link bandwidth into a plurality of sub-bandwidths;
specifically, each data transmission channel occupies a corresponding bandwidth, and when data transmission channels with different frequency points are set, the embodiment of the invention firstly divides the system communication link, and the divided sub-bandwidths are used for the data transmission channels to transmit data.
It should be noted that, in order to ensure that the system communication link is expanded and the service data is also expanded at the same time, in the embodiment of the present invention, the bandwidth of the system communication link is averagely divided into a plurality of sub-bandwidths, and the bandwidth of the sub-bandwidth is an integer multiple of 12.5k, and preferably, is divided into the minimum sub-bandwidth of 12.5 k. That is to say, in the technical solution of the present invention, the bandwidth of the system communication link is set to be an integer multiple of the minimum bandwidth of 12.5k, so as to divide the sub-bandwidths conveniently and ensure normal transmission of the service data.
S202, respectively setting a transceiving frequency point in each sub-bandwidth;
specifically, a transceiving frequency point is set in each sub-bandwidth, and is used for identifying the sub-bandwidth where the transceiving frequency point is located. When the wireless link machine selects a certain set frequency point to transmit data, the wireless link machine actually transmits the data in the sub-bandwidth of the selected frequency point.
S203, respectively setting the first time slots of all the wireless subframes on each transceiving frequency point as a data transmission channel, and respectively setting the second time slots of all the wireless subframes on each transceiving frequency point as a data transmission channel.
Specifically, the police digital trunking system transmits data in a time division duplex mode, that is, the data is periodically and alternately transmitted in two time slots of a wireless subframe. The embodiment of the invention sets the data transmission channel according to the working mode. Regarding a certain transceiving frequency point, taking the first time slots of all wireless subframes on the frequency point as a data transmission channel; and meanwhile, taking the second time slots of all the wireless subframes on the frequency point as a data transmission channel. Thus, two data transmission channels are set at each transceiving frequency point, and the setting is executed for all the divided transceiving frequency points to obtain a plurality of data transmission channels.
It should be noted that, when the working mode or the radio frame structure of the digital trunking system for police changes and a radio subframe includes a single or multiple time slots, the same time slots of all radio subframes on the set transceiving frequency point are set as one data transmission channel by the processing method of the technical scheme of the embodiment of the present invention, and multiple data transmission channels can be obtained in the same way. Further, the wireless link machine multiplexes the plurality of data transmission channels according to a set sequence, thereby realizing multi-level extended coverage.
For example, in the embodiment of the present invention, it is assumed that the bandwidth of the system communication link is 25k, and the system communication link is divided into two sub-bandwidths, each sub-bandwidth is 12.5 k; setting F1 as a transceiving frequency point in one 12.5k sub-bandwidth, and setting F2 as a transceiving frequency point in the other 12.5k sub-bandwidth; for F1, the first time slot S1 of all radio subframes in the F1 frequency point is set as a data transmission channel, and the second time slot S2 of all radio subframes in the F1 frequency point is set as a data transmission channel, resulting in data transmission channels F1S1 and F1S 2. Likewise, for F2, data transmission channels F2S1 and F2S2 may be set.
According to the rule shown in fig. 3, F1S1, F1S2, F2S1 and F2S2 are stored in the data transmission channel multiplexing periodic table, and when the wireless link machine occupies the data transmission channel, the wireless link machine occupies the data transmission channel in the order of F1S1 → F1S2 → F2S1 → F2S 2. Specifically, as shown in fig. 4, when a plurality of wireless link devices are in a hybrid networking, a data transmission channel is occupied in the order of F1S1 → F1S2 → F2S1 → F2S2, thereby realizing a multi-hop extension coverage.
Optionally, in another embodiment of the present invention, the identifying a data transmission channel receiving the data includes:
and identifying the transceiving frequency point and the time slot of the data transmission channel for receiving the data.
Specifically, when setting the data transmission channel in the embodiment of the present invention, the data transmission channel is set according to the transceiving frequency point and the time slot based on the working mode of the police digital trunking system, and different combinations of the transceiving frequency point and the time slot are set as different data transmission channels. And the wireless link machine identifies the data transmission channel by the frequency point and the time slot of the data transmission channel and stores the identification information. Therefore, the identification of different data transmission channels can be distinguished only by the transceiving frequency point and the time slot where the data transmission channel is located. Therefore, when the wireless link machine identifies the data transmission channel for receiving the data, the transceiving frequency point and the time slot of the data transmission channel are identified.
Optionally, in another embodiment of the present invention, the storing the identification information of the multiple data transmission channels in the multiplexing periodic table of the data transmission channels according to the set sequence includes:
and storing the identification information of the plurality of data transmission channels in a multiplexing periodic table of the data transmission channels according to the sequence according to the rule that the time slot identifications in the identification information of the data transmission channels are changed alternately.
Specifically, in the PDT system communication link, the wireless link machine receives data via the first time slot and then transmits the data via the second time slot. That is, when the wireless link machine occupies the data transmission channel, it is required to ensure that the occupied time slots of the data transmission channel are different. In order to meet the requirements when the wireless link machine selects the data transmission channel, when the plurality of data transmission channels are stored, the data transmission channels are stored according to the rule that the time slot identifiers in the identification information of the data transmission channels are changed alternately. Therefore, when the wireless link machine sequentially selects and occupies the data transmission channels from the data transmission channel multiplexing periodic table, the beneficial effects of different occupied time slots of the data transmission channels can be achieved.
Optionally, in another embodiment of the present invention, the setting, as the data transmission channel used for sending the data, a next data transmission channel of the data transmission channels that receive the data in the data transmission channel multiplexing periodic table includes:
and when the data transmission channel for receiving the data is the last data transmission channel stored in the data transmission channel multiplexing periodic table, setting a data transmission channel, which is in the data transmission channel multiplexing periodic table and is before the data transmission channel for receiving the data, is at least separated from the data transmission channel for receiving the data by one data transmission channel and is different from the time slot identifier of the identifier information of the data transmission channel for receiving the data, as a data transmission channel for sending the data.
Specifically, when the last radio link machine has occupied the last data transmission channel in the data transmission channel multiplexing period table to transmit data, the radio link machine selects the next data transmission channel of the last data transmission channel according to the previously set rule, and the selection fails because no data transmission channel is available for selection. In this case, the technical solution of the present invention sets that the wireless link machine sets, as a data transmission channel for transmitting data, a data transmission channel that is before the last data transmission channel and is at least one data transmission channel apart from the last data transmission channel. In addition, in order to ensure that the time slot for receiving data and the time slot for sending data of the wireless link machine are different, the embodiment of the invention simultaneously requires that the time slot of the data transmission channel selected by the wireless link machine is different from the time slot of the last data transmission channel.
Optionally, in another embodiment of the present invention, the setting, in the data transmission channel multiplexing periodic table, a data transmission channel that is before the data transmission channel receiving the data and is at least separated from the data transmission channel receiving the data by one data transmission channel, and is different from the time slot identifier of the identifier information of the data transmission channel receiving the data, as a data transmission channel for sending the data includes:
and setting the first data transmission channel in the data transmission channel multiplexing periodic table as a data transmission channel for sending the data.
Specifically, in the embodiment of the present invention, the storage of the data transmission channel is stored according to a rule that time slots of the data transmission channel change alternately. Each transceiving frequency point is provided with two data transmission channels with different time slots, namely, the number of the data transmission channels is even. Therefore, when the time slots of the first data transmission channel and the last data transmission channel in the data transmission channel multiplexing periodic table are different, the first data transmission channel is selected to meet the requirement that the time slots of the wireless link machine for receiving data are different from the time slots of the wireless link machine for sending data. And, select first data transmission channel, can guarantee more strictly that each wireless link machine will not produce the interference when occupying the channel and sending data, do benefit to and realize multistage extension.
Another embodiment of the present invention further discloses a wireless link machine, as shown in fig. 5, including:
a channel setting and storing unit 501, configured to set multiple data transmission channels in a system communication link, and store identification information of the multiple data transmission channels in a data transmission channel multiplexing periodic table according to a set sequence; wherein the number of the plurality of data transmission channels is not less than 3; the identification information comprises a receiving and sending frequency point identification and a time slot identification;
a data receiving unit 502, configured to receive data transmitted in the system communication link;
an identifying unit 503, configured to identify a data transmission channel receiving the data;
a processing unit 504, configured to set, according to the data transmission channel that receives the data, a next data transmission channel in the data transmission channel multiplexing periodic table that receives the data as a data transmission channel for sending the data;
a data sending unit 505, configured to send the data through the data transmission channel for sending the data.
Specifically, please refer to the content of the corresponding method embodiment for the specific working content of each unit in this embodiment, which is not described herein again.
The wireless link machine provided by the invention sets a plurality of data transmission channels in a system communication link through a channel setting and storing unit 501, and stores the plurality of data transmission channels in a data transmission channel multiplexing periodic table according to the sequence; after the data receiving unit 502 receives data in the system communication link, the identifying unit 503 identifies a data transmission channel receiving the data; then, the processing unit 504 sets the next data transmission channel in the data transmission channel multiplexing periodic table to be the data transmission channel for sending the data according to the data transmission channel for receiving the data; the data sending unit 505 sends the data through the data transmission channel for sending the data. In the technical scheme of the invention, the wireless link machine divides the communication link into a plurality of data transmission channels, and the plurality of wireless link machines occupy the channels according to the set sequence to transmit data without mutual interference, thereby realizing the purpose of multi-level extension coverage.
Optionally, in another embodiment of the present invention, when the channel setting and storing unit 501 sets a plurality of data transmission channels in the system communication link, it is specifically configured to:
and respectively setting the first time slots of all the wireless subframes and the second time slots of all the wireless subframes on different set transceiving frequency points in the bandwidth of a system communication link as data transmission channels.
Specifically, in this embodiment, please refer to the contents of the corresponding method embodiment for the specific working contents of the channel setting and storing unit 501, which is not described herein again.
Optionally, in another embodiment of the present invention, when the channel setting and storing unit 501 sets the first time slots of all the radio subframes and the second time slots of all the radio subframes on different set transceiving frequency points in the bandwidth of the system communication link as data transmission channels, it is specifically configured to:
dividing a system communication link bandwidth into a plurality of sub-bandwidths;
respectively setting a transceiving frequency point in each sub-bandwidth;
and respectively setting the first time slots of all the wireless subframes on each transceiving frequency point as a data transmission channel, and respectively setting the second time slots of all the wireless subframes on each transceiving frequency point as a data transmission channel.
Specifically, in this embodiment, please refer to the contents of the corresponding method embodiment for the specific working contents of the channel setting and storing unit 501, which is not described herein again.
Optionally, in another embodiment of the present invention, when the identifying unit 503 identifies a data transmission channel receiving the data, it is specifically configured to:
and identifying the transceiving frequency point and the time slot of the data transmission channel for receiving the data.
Specifically, please refer to the content of the corresponding method embodiment for the specific work content of the identifying unit 503 in this embodiment, which is not described herein again.
Optionally, in another embodiment of the present invention, when the channel setting and storing unit 501 stores the identification information of the multiple data transmission channels in the data transmission channel multiplexing periodic table according to the set sequence, the channel setting and storing unit is specifically configured to:
and storing the identification information of the plurality of data transmission channels in a multiplexing periodic table of the data transmission channels according to the sequence according to the rule that the time slot identifications in the identification information of the data transmission channels are changed alternately.
Specifically, in this embodiment, please refer to the contents of the corresponding method embodiment for the specific working contents of the channel setting and storing unit 501, which is not described herein again.
Optionally, in another embodiment of the present invention, when the processing unit 504 sets, as the data transmission channel used for sending the data, the next data transmission channel of the data transmission channels that receive the data in the data transmission channel multiplexing periodic table, specifically configured to:
and when the data transmission channel for receiving the data is the last data transmission channel stored in the data transmission channel multiplexing periodic table, setting a data transmission channel, which is in the data transmission channel multiplexing periodic table and is before the data transmission channel for receiving the data, is at least separated from the data transmission channel for receiving the data by one data transmission channel and is different from the time slot identifier of the identifier information of the data transmission channel for receiving the data, as a data transmission channel for sending the data.
Specifically, please refer to the content of the corresponding method embodiment for the specific working content of the processing unit 504 in this embodiment, which is not described herein again.
Optionally, in another embodiment of the present invention, when the processing unit 504 sets, in the data transmission channel multiplexing periodic table, a data transmission channel that is before the data transmission channel receiving the data, is at least separated from the data transmission channel receiving the data by one data transmission channel, and is different from the time slot identifier of the identifier information of the data transmission channel receiving the data, as a data transmission channel used for sending the data, specifically configured to:
and setting the first data transmission channel in the data transmission channel multiplexing periodic table as a data transmission channel for sending the data.
Specifically, please refer to the content of the corresponding method embodiment for the specific working content of the processing unit 504 in this embodiment, which is not described herein again.
Another embodiment of the present invention further discloses another wireless link device, as shown in fig. 6, including:
a processor 601, a memory 602, a data receiver 603, and a data transmitter 604;
the data receiver 603 is connected to the processor 601, and is configured to receive data transmitted in a system communication link;
the memory 602 is connected to the processor 601, and is used for storing programs and data generated during program operation;
the processor 601 is configured to implement the following functions by running the program in the memory 602:
setting a plurality of data transmission channels in a system communication link, and storing identification information of the plurality of data transmission channels in a data transmission channel multiplexing periodic table according to a set sequence; wherein the number of the plurality of data transmission channels is not less than 3; the identification information comprises a receiving and sending frequency point identification and a time slot identification; identifying the data transmission channel on which the data receiver 603 receives the data; according to the data transmission channel for receiving the data, setting the next data transmission channel of the data transmission channel for receiving the data in the data transmission channel multiplexing periodic table as a data transmission channel for sending the data;
the data transmitter 604 is connected to the processor 601, and configured to transmit the data through a data transmission channel configured by the processor 601 and used for transmitting the data.
Specifically, for details of each part in this embodiment, please refer to the contents of the corresponding method embodiment, which is not described herein again.
When transmitting data, the wireless link machine sets a plurality of data transmission channels in a system communication link through a processor 601, and stores identification information of the plurality of data transmission channels in a data transmission channel multiplexing periodic table according to a sequence; after the data receiver 603 receives data in the system communication link, the processor 601 identifies a data transmission channel on which the data receiver 603 receives the data; then according to the data transmission channel for receiving the data, setting the next data transmission channel of the data transmission channel for receiving the data in the data transmission channel multiplexing periodic table as a data transmission channel for sending the data; the data is transmitted by the data transmitter 604 through the data transmission channel used to transmit the data. In the technical scheme of the invention, the wireless link machine divides the communication link into a plurality of data transmission channels, and the plurality of wireless link machines occupy the channels according to the set sequence to transmit data without mutual interference, thereby meeting the requirement of multistage extension coverage.
Optionally, in another embodiment of the present invention, when the processor 601 sets a plurality of data transmission channels in the system communication link, the processor is specifically configured to:
and respectively setting the first time slots of all the wireless subframes and the second time slots of all the wireless subframes on different set transceiving frequency points in the bandwidth of a system communication link as data transmission channels.
Specifically, for the specific working content of the processor 601 in this embodiment, please refer to the content of the corresponding method embodiment, which is not described herein again.
Optionally, in another embodiment of the present invention, when the processor 601 sets the first time slots of all the radio subframes and the second time slots of all the radio subframes on different set transceiving frequency points in the bandwidth of the system communication link as data transmission channels, the processor is specifically configured to:
dividing a system communication link bandwidth into a plurality of sub-bandwidths;
respectively setting a transceiving frequency point in each sub-bandwidth;
and respectively setting the first time slots of all the wireless subframes on each transceiving frequency point as a data transmission channel, and respectively setting the second time slots of all the wireless subframes on each transceiving frequency point as a data transmission channel.
Specifically, for the specific working content of the processor 601 in this embodiment, please refer to the content of the corresponding method embodiment, which is not described herein again.
Optionally, in another embodiment of the present invention, when the processor 601 identifies a data transmission channel through which the data receiver receives the data, the processor is specifically configured to:
and identifying the transceiving frequency point and the time slot of the data transmission channel for receiving the data by the data receiver.
Specifically, for the specific working content of the processor 601 in this embodiment, please refer to the content of the corresponding method embodiment, which is not described herein again.
Optionally, in another embodiment of the present invention, when the processor 601 stores the identification information of the multiple data transmission channels in the data transmission channel multiplexing periodic table of the memory according to the set sequence, the identification information is specifically configured to:
and storing the identification information of the plurality of data transmission channels in a data transmission channel multiplexing periodic table of the memory according to the sequence according to the rule that the time slot identifications in the identification information of the data transmission channels are changed alternately.
Specifically, for the specific working content of the processor 601 in this embodiment, please refer to the content of the corresponding method embodiment, which is not described herein again.
Optionally, in another embodiment of the present invention, when the processor 601 sets the next data transmission channel of the data transmission channels receiving the data in the data transmission channel multiplexing periodic table as the data transmission channel for sending the data, specifically, the processor is configured to:
and when the data transmission channel for receiving the data is the last data transmission channel stored in the data transmission channel multiplexing periodic table, setting a data transmission channel, which is in the data transmission channel multiplexing periodic table and is before the data transmission channel for receiving the data, is at least separated from the data transmission channel for receiving the data by one data transmission channel and is different from the time slot identifier of the identifier information of the data transmission channel for receiving the data, as a data transmission channel for sending the data.
Specifically, for the specific working content of the processor 601 in this embodiment, please refer to the content of the corresponding method embodiment, which is not described herein again.
Optionally, in another embodiment of the present invention, when the processor 601 sets, as the data transmission channel for transmitting the data, a data transmission channel in the data transmission channel multiplexing periodic table, which is before the data transmission channel for receiving the data, at least one data transmission channel apart from the data transmission channel for receiving the data and has a different slot identifier from the slot identifier of the identification information of the data transmission channel for receiving the data, specifically configured to:
and setting the first data transmission channel in the data transmission channel multiplexing periodic table as a data transmission channel for sending the data.
Specifically, for the specific working content of the processor 601 in this embodiment, please refer to the content of the corresponding method embodiment, which is not described herein again.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (12)
1. A data transmission method is characterized in that the method is applied to a wireless link machine, the wireless link machine sets a plurality of data transmission channels in a system communication link, and stores identification information of the data transmission channels in a data transmission channel multiplexing periodic table according to a set sequence; wherein the number of the plurality of data transmission channels is not less than 3; the identification information comprises a receiving and sending frequency point identification and a time slot identification; the method comprises the following steps:
receiving data transmitted in the system communication link;
identifying a data transmission channel receiving the data;
according to the data transmission channel for receiving the data, setting the next unoccupied data transmission channel of the data transmission channel for receiving the data in the data transmission channel multiplexing periodic table as a data transmission channel for sending the data;
and sending the data through the data transmission channel for sending the data.
2. The method of claim 1, wherein setting up a plurality of data transmission channels in a system communication link comprises:
and respectively setting the first time slots of all the wireless subframes and the second time slots of all the wireless subframes on different set transceiving frequency points in the bandwidth of a system communication link as data transmission channels.
3. The method according to claim 2, wherein the setting the first time slots of all radio subframes and the second time slots of all radio subframes on different set transceiving frequency points in the system communication link bandwidth as data transmission channels respectively comprises:
dividing a system communication link bandwidth into a plurality of sub-bandwidths;
respectively setting a transceiving frequency point in each sub-bandwidth;
and respectively setting the first time slots of all the wireless subframes on each transceiving frequency point as a data transmission channel, and respectively setting the second time slots of all the wireless subframes on each transceiving frequency point as a data transmission channel.
4. The method according to claim 3, wherein the storing the identification information of the plurality of data transmission channels in the multiplexing periodic table of data transmission channels according to the set sequence comprises:
and storing the identification information of the plurality of data transmission channels in a multiplexing periodic table of the data transmission channels according to the sequence according to the rule that the time slot identifications in the identification information of the data transmission channels are changed alternately.
5. The method according to claim 4, wherein the setting a next data transmission channel of the data transmission channels receiving the data in the data transmission channel multiplexing periodic table as a data transmission channel for transmitting the data comprises:
and when the data transmission channel for receiving the data is the last data transmission channel stored in the data transmission channel multiplexing periodic table, setting a data transmission channel, which is in the data transmission channel multiplexing periodic table and is before the data transmission channel for receiving the data, is at least separated from the data transmission channel for receiving the data by one data transmission channel and is different from the time slot identifier of the identifier information of the data transmission channel for receiving the data, as a data transmission channel for sending the data.
6. The method according to claim 5, wherein the setting, as the data transmission channel for transmitting the data, a data transmission channel in the data transmission channel multiplexing periodic table that is prior to the data transmission channel receiving the data and that is at least separated from the data transmission channel receiving the data by one data transmission channel and that is different from the slot identifier of the identification information of the data transmission channel receiving the data, comprises:
and setting the first data transmission channel in the data transmission channel multiplexing periodic table as a data transmission channel for sending the data.
7. A wireless link machine, comprising:
the channel setting and storing unit is used for setting a plurality of data transmission channels in a system communication link and storing the identification information of the data transmission channels in a data transmission channel multiplexing periodic table according to the set sequence; wherein the number of the plurality of data transmission channels is not less than 3; the identification information comprises a receiving and sending frequency point identification and a time slot identification;
a data receiving unit, configured to receive data transmitted in the system communication link;
the identification unit is used for identifying a data transmission channel for receiving the data;
a processing unit, configured to set, according to the data transmission channel that receives the data, an unoccupied next data transmission channel of the data transmission channel that receives the data in the data transmission channel multiplexing periodic table as a data transmission channel for sending the data;
and the data sending unit is used for sending the data through the data transmission channel for sending the data.
8. The rls according to claim 7, wherein when the channel configuration and storage unit stores the identification information of the plurality of data transmission channels in the multiplexing periodic table of data transmission channels according to the configured sequence, the channel configuration and storage unit is specifically configured to:
and storing the identification information of the plurality of data transmission channels in a multiplexing periodic table of the data transmission channels according to the sequence according to the rule that the time slot identifications in the identification information of the data transmission channels are changed alternately.
9. The rlm according to claim 8, wherein the processing unit sets a next data transmission channel of the data transmission channels receiving the data in the data transmission channel multiplexing periodic table as the data transmission channel for transmitting the data, and includes:
and when the data transmission channel for receiving the data is the last data transmission channel stored in the data transmission channel multiplexing periodic table, setting a data transmission channel, which is in the data transmission channel multiplexing periodic table and is before the data transmission channel for receiving the data, is at least separated from the data transmission channel for receiving the data by one data transmission channel and is different from the time slot identifier of the identifier information of the data transmission channel for receiving the data, as a data transmission channel for sending the data.
10. A wireless link machine, comprising:
a processor, a memory, a data receiver and a data transmitter;
the data receiver is connected with the processor and used for receiving data transmitted in a system communication link;
the memory is connected with the processor and is used for storing programs and data generated in the process of program operation;
the processor is used for realizing the following functions by running the program in the memory:
setting a plurality of data transmission channels in a system communication link, and storing identification information of the plurality of data transmission channels in a data transmission channel multiplexing periodic table according to a set sequence; wherein the number of the plurality of data transmission channels is not less than 3; the identification information comprises a receiving and sending frequency point identification and a time slot identification; identifying a data transmission channel on which the data receiver receives the data; according to the data transmission channel for receiving the data, setting the next unoccupied data transmission channel of the data transmission channel for receiving the data in the data transmission channel multiplexing periodic table as a data transmission channel for sending the data;
the data transmitter is connected with the processor and used for transmitting the data through a data transmission channel which is set by the processor and used for transmitting the data.
11. The rlf according to claim 10, wherein the processor, when setting a plurality of data transmission channels in the system communication link, is specifically configured to:
and respectively setting the first time slots of all the wireless subframes and the second time slots of all the wireless subframes on different set transceiving frequency points in the bandwidth of a system communication link as data transmission channels.
12. The rls according to claim 11, wherein the processor is configured to, when setting the first time slots of all radio subframes and the second time slots of all radio subframes on different set transceiving frequency points in a system communication link bandwidth as data transmission channels, specifically:
dividing a system communication link bandwidth into a plurality of sub-bandwidths;
respectively setting a transceiving frequency point in each sub-bandwidth;
and respectively setting the first time slots of all the wireless subframes on each transceiving frequency point as a data transmission channel, and respectively setting the second time slots of all the wireless subframes on each transceiving frequency point as a data transmission channel.
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| CN106385708B (en) * | 2016-09-13 | 2020-05-12 | 哈尔滨海能达科技有限公司 | Data transmission method and wireless link machine |
| CN107148057B (en) * | 2017-06-23 | 2021-01-19 | 哈尔滨海能达科技有限公司 | Link information processing method and system and link machine |
| WO2021012253A1 (en) * | 2019-07-25 | 2021-01-28 | 哈尔滨海能达科技有限公司 | Signal transfer method and apparatus for trunked communication system, and terminal, transfer device and trunked communication system |
| CN110418415B (en) * | 2019-07-25 | 2023-06-13 | 哈尔滨海能达科技有限公司 | Cluster communication system signal transfer method, terminal, transfer equipment and cluster communication system |
| CN113872658B (en) * | 2020-06-30 | 2023-10-31 | 星宸科技股份有限公司 | Wireless communication system and wireless signal extension device and method thereof |
| WO2023015434A1 (en) * | 2021-08-10 | 2023-02-16 | 哈尔滨海能达科技有限公司 | Data transmission method, wireless ad hoc network forwarding apparatus, terminal, and storage medium |
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