CN111132383A - Narrow-band cluster terminal data transmission method - Google Patents
Narrow-band cluster terminal data transmission method Download PDFInfo
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- CN111132383A CN111132383A CN201911398904.3A CN201911398904A CN111132383A CN 111132383 A CN111132383 A CN 111132383A CN 201911398904 A CN201911398904 A CN 201911398904A CN 111132383 A CN111132383 A CN 111132383A
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- H—ELECTRICITY
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- H04W76/40—Connection management for selective distribution or broadcast
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/80—Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
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- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/90—Services for handling of emergency or hazardous situations, e.g. earthquake and tsunami warning systems [ETWS]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W8/00—Network data management
- H04W8/005—Discovery of network devices, e.g. terminals
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Abstract
The invention discloses a narrowband cluster terminal data transmission method, which comprises the following steps: establishing data transmission links, namely establishing N data transmission links between cluster terminals, wherein two ends of each data transmission link are respectively a sending cluster terminal and a receiving cluster terminal; the sending end unpacks data to be sent into N data sub-packets, and respectively sends the N data sub-packets to N sending cluster terminals, and the N sending cluster terminals send the received data sub-packets to receiving cluster terminals through respective corresponding data transmission links; and the receiving cluster terminal sends the received data sub-packets to the receiving end, and the receiving end groups all the data sub-packets and restores the data sub-packets into one data packet. According to the narrowband cluster terminal data transmission method, the data to be transmitted are unpacked into a plurality of data sub-packets, and a mode that a plurality of cluster terminals transmit simultaneously is adopted, so that the data transmission rate is improved, and the technical problem that a single cluster terminal is low in transmission rate can be solved.
Description
Technical Field
The invention belongs to the technical field of communication, and particularly relates to a narrowband cluster terminal data transmission method.
Background
Compared with a narrow-band cluster, the narrow-band cluster has extremely obvious advantages in the aspects of reliability and strong survivability, the wide-band cluster adopts a honeycomb system, the coverage area is very small, compared with the narrow-band cluster, about 10 times of base stations are required to be added, huge infrastructure reduces the survivability of the whole system, and when serious natural disasters and terrorist attacks are encountered, the reliable operation of the system cannot be ensured. The huge basic implementation greatly improves the construction cost and the maintenance cost, the cost comprises the cost of renting a base station machine room and a link, the difference between the two costs is about 10 times, and the relationship between the broadband and the narrow-band cluster system cannot be simply replaced but is complementary. Therefore, the narrowband cluster system will exist as a final guarantee for emergency communication for a long time in the future.
However, the narrowband trunking terminal has obvious weakness in data transmission, is limited by bandwidth, has low transmission rate, and is a main technical problem for how to improve the transmission rate.
Disclosure of Invention
The invention provides a narrow-band cluster terminal data transmission method based on the technical problem that the transmission rate is low because the data transmission of a narrow-band cluster terminal in the prior art is limited by bandwidth, and the problems can be solved.
In order to realize the purpose of the invention, the invention is realized by adopting the following technical scheme:
a narrowband trunking terminal data transmission method comprises the following steps:
a step of establishing data transmission links, namely establishing N data transmission links between cluster terminals, wherein two ends of each data transmission link are respectively a sending cluster terminal and a receiving cluster terminal, the sending cluster terminal is a cluster terminal of a sending end, the receiving cluster terminal is a cluster terminal of a receiving end, and N is a positive integer;
a data sending step, in which the sending end unpacks data to be sent into N data sub-packets, and respectively sends the N data sub-packets to N sending cluster terminals, and the N sending cluster terminals send the received data sub-packets to a receiving cluster terminal through respective corresponding data transmission links;
and a data receiving and restoring step, wherein the receiving cluster terminal sends the received data sub-packets to the receiving end, and the receiving end groups and packs all the data sub-packets and restores the data sub-packets into one data packet.
Further, the step of establishing the data transmission link also includes a step of negotiating and confirming the number N of the data transmission links, where the sending end and the receiving end negotiate and confirm the number N of the data transmission links according to the number of sending cluster terminals and the number of receiving cluster terminals that can be searched respectively, and the number N of the data transmission links is not greater than the minimum value of the number of sending cluster terminals and the number of receiving cluster terminals.
Further, the step of negotiating the number N of the acknowledged data transmission links comprises:
the sending end firstly sends a request for establishing a data transmission link to a receiving end through one sending cluster terminal, and the sending cluster terminal sends the request to a receiving cluster terminal;
after receiving the request for establishing the data transmission link, the receiving cluster terminal sends the request to a receiving end;
after receiving the request for establishing the data transmission link, the receiving end searches all the surrounding receiving cluster terminals, and transmits the number of the searched receiving cluster terminals back to the sending end, and the sending end confirms the number N of the data transmission links.
Further, after receiving the information returned by the receiving end, the sending end searches all the sending cluster terminals around the sending end, and finally determines the number N of the data transmission links by combining the number of the receiving cluster terminals.
Further, the sending end also includes a cluster terminal corresponding table for establishing a data transmission link, and sends the cluster terminal corresponding table to the receiving end.
Further, in the step of establishing the data transmission link, the sending end and the receiving end respectively search their surrounding cluster terminals through bluetooth.
Further, in the step of establishing the data transmission link, after the sending end and the receiving end search their respective trunking terminals, the method further comprises a step of bluetooth pairing:
the initiating terminal sends an authentication application data packet to the initiated terminal;
after receiving the authentication application data packet, the initiated end authenticates the initiating end, and after the authentication is passed, sends an authentication reply to the initiating end and enables automatic pairing;
the initiating terminal receives the authentication reply and initiates a pairing request;
after receiving the pairing request, the initiated end judges whether the pairing request is initiated by the authenticated equipment, if so, the pairing is automatically carried out, and the initiating end is informed; if the device is not authorized, the pairing is refused, and the automatic pairing function is closed;
the initiating terminal is a sending terminal, the initiated terminal is a sending trunking terminal, or the initiating terminal is a receiving trunking terminal, the initiated terminal is a receiving trunking terminal, or the initiating terminal is a receiving trunking terminal, and the initiated terminal is a receiving terminal.
Further, the authentication application data packet is encrypted by using a secret key, and the authentication application data packet at least comprises an MAC address and authentication information.
Further, the sending end further marks the data to be sent with an emergency level, and in the data transmission link negotiation step, the sending end further performs weighted calculation on the emergency level of the data to be sent, the data size and the number of the cluster terminals searched by the sending end and the receiving end to obtain the number N of the data transmission links.
Further, in the data receiving step, N receiving cluster terminals are adopted to correspondingly receive N data sub-packets forwarded by the base station one by one, and the N receiving cluster terminals send the received data sub-packets to the receiving end.
Compared with the prior art, the invention has the advantages and positive effects that: according to the narrowband cluster terminal data transmission method, the data to be transmitted are unpacked into a plurality of data sub-packets, and a mode that a plurality of cluster terminals transmit simultaneously is adopted, so that the data transmission rate is improved, and the technical problem that a single cluster terminal is low in transmission rate can be solved.
Other features and advantages of the present invention will become more apparent from the following detailed description of the invention when taken in conjunction with the accompanying drawings.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic diagram of an embodiment of narrowband trunking terminal data transmission proposed by the present invention;
fig. 2 is a flowchart of an embodiment of a narrowband trunking terminal data transmission method proposed by the present invention;
fig. 3 is a schematic diagram of bluetooth pairing in an embodiment of the narrowband trunking terminal data transmission method provided by the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and examples.
The narrow-band cluster has low requirement on the density of the base station, has the advantages of strong survivability and low basic maintenance cost, and has an irreplaceable position in a short time as the final guarantee of emergency communication. Meanwhile, the narrow-band cluster has a defect that the transmission rate is limited by the bandwidth. Therefore, under the premise of limited bandwidth, the higher the data transmission rate, the better the reliability, and the better the data transmission rate. Based on this, the present invention provides a narrowband trunking terminal data transmission method, which can solve the above problems and will be described in detail with a specific embodiment below.
First embodiment, the present invention mainly solves the problem of data transmission under emergency conditions (cluster-only communication). As shown in fig. 1, single-path transmission of a transmitting end and a receiving end is upgraded to multi-path transmission, thereby achieving the effect of increasing the data transmission speed by times. This embodiment provides a narrowband trunking terminal data transmission method, as shown in fig. 1, where the narrowband trunking includes a sending end 1 and a receiving end 2, the sending end 1 has a plurality of trunking terminals, and for sending the trunking terminal 11, the receiving end 2 has a plurality of trunking terminals, and for receiving the trunking terminal 21, as shown in fig. 2, the narrowband trunking terminal data transmission method includes:
a step of establishing data transmission links, in which N data transmission links are established between cluster terminals, and two ends of each data transmission link are a sending cluster terminal 11 and a receiving cluster terminal 21, respectively, where the sending cluster terminal 11 is a cluster terminal of a sending end 1, the receiving cluster terminal 21 is a cluster terminal of a receiving end 2, and N is a positive integer;
a data sending step, in which a sending end 1 unpacks data to be sent into N data sub-packets, and sends the N data sub-packets to N sending cluster terminals respectively, and the N sending cluster terminals send the received data sub-packets to a receiving cluster terminal through respective corresponding data transmission links;
and a data receiving and restoring step, wherein the receiving cluster terminal sends the received data sub-packets to the receiving end 2, and the receiving end 2 groups and packs all the data sub-packets and restores the data sub-packets into one data packet. In general, after receiving all the N data sub-packets, the receiving end 2 restores the N data sub-packets into a complete data packet, and the data packet is consistent with the data packet before unpacking at the sending end 1, so that the data transmission accuracy is high.
In the narrowband trunking terminal data transmission method of this embodiment, N data transmission links are established between trunking terminals, data to be transmitted is unpacked into multiple data sub-packets, and a mode of simultaneously transmitting the multiple data transmission links is adopted, and finally all the data sub-packets are packed and restored by a receiving end to form a complete data packet, only 1/N of the original data transmission links are needed for transmission, so that the effect of increasing the data transmission rate by times is achieved, and the technical problem of low transmission rate of a single trunking terminal can be solved.
The sending end and the receiving end can be intelligent processing equipment such as a PC (personal computer) or an upper computer and the like.
Since the transmission distance of the data transmission link may be relatively long, the transmitting trunking terminal and the receiving trunking terminal need to forward through one or more base stations 3, in the data transmitting step in this embodiment, the transmitting trunking terminal may first transmit the received data sub-packet to the base station, and then the base station forwards the data sub-packet to the corresponding receiving trunking terminal according to the corresponding data transmission link.
The number of trunking terminals that can be utilized by different sending and receiving ends is different, and the number of trunking terminals determines the number of data transmission links that can be established. The number of data transmission links that can be established at different times by different sending ends and receiving ends, and the same sending end and receiving end may be different, so that the step of establishing data transmission links further includes a step of negotiating and confirming the number N of data transmission links, which is used to negotiate and confirm the number of data transmission links that can be established currently.
Specifically, the sending end 1 and the receiving end 2 negotiate and confirm the number N of data transmission links according to the number of sending cluster terminals and the number of receiving cluster terminals that can be searched respectively, where the number N of data transmission links is not greater than the minimum value of the number of sending cluster terminals and the number of receiving cluster terminals. In order to improve the accuracy of data transmission, a data transmission link is generally established by one-to-one correspondence between a sending trunking terminal and a receiving trunking terminal, and therefore, the number N of the data transmission links is not greater than the minimum value of the number of the sending trunking terminals and the number of the receiving trunking terminals.
Since the sending end is used as the data sending initiating end, in this embodiment, it is preferable that the sending end performs negotiation to determine the number of data transmission links, and therefore, the step of negotiating to determine the number N of data transmission links includes:
the sending end 1 firstly sends a request for establishing a data transmission link to a receiving end through one sending cluster terminal, and the sending cluster terminal sends the request to a receiving cluster terminal;
after receiving the request for establishing the data transmission link, the receiving cluster terminal sends the request to a receiving end;
after receiving the request for establishing the data transmission link, the receiving end searches all the surrounding receiving cluster terminals, and transmits the number of the searched receiving cluster terminals back to the sending end, and the sending end confirms the number N of the data transmission links.
In this embodiment, a wireless communication mode is adopted between the sending end and the sending end cluster and between the receiving end and the receiving end cluster, so that the problems that the data volume connection and the plugging are complicated and the number of required hardware interfaces is large can be solved.
In order to improve the security of wireless communication, both sides of wireless communication establish wireless communication connection in a request and response manner.
After receiving the information returned by the receiving end 2, the sending end 1 searches all the sending cluster terminals around the sending end, and finally determines the number N of the data transmission links by combining the number of the receiving cluster terminals.
The sending end 1 also includes a cluster terminal corresponding table for establishing a data transmission link, and sends the cluster terminal corresponding table to the receiving end 2. The corresponding relation between the sending cluster terminal and the receiving cluster terminal of each data transmission link is recorded in the corresponding table of the cluster terminal.
In the step of establishing the data transmission link, the sending end and the receiving end respectively search the cluster terminals around each through Bluetooth. The Bluetooth has the advantages of high transmission rate and high reliability, the transmitting end distributes data sub-packets to each transmitting cluster terminal through the Bluetooth interface after sub-packets, and the transmitting cluster terminals transmit the data sub-packets to corresponding receiving cluster terminals according to the corresponding list of the cluster terminals.
The cluster terminal is automatically connected with the sending end and the receiving end through Bluetooth respectively, manual cable connection in a traditional mode is replaced, and the problems of complex operation and complexity in a traditional mode are solved.
In the step of establishing the data transmission link, after the sending end 1 and the receiving end 2 search their respective trunking terminals, as shown in fig. 3, the method further includes a step of bluetooth pairing:
the initiating terminal sends an authentication application data packet to the initiated terminal;
after receiving the authentication application data packet, the initiated end authenticates the initiating end, and after the authentication is passed, sends an authentication reply to the initiating end and enables automatic pairing;
the initiating terminal receives the authentication reply and initiates a pairing request;
after receiving the pairing request, the initiated end judges whether the pairing request is initiated by the authenticated equipment, if so, the pairing is automatically carried out, and the initiating end is informed; if the device is not authorized, the pairing is refused, and the automatic pairing function is closed;
the initiating terminal is a sending terminal, the initiated terminal is a sending trunking terminal, or the initiating terminal is a receiving trunking terminal, the initiated terminal is a receiving trunking terminal, or the initiating terminal is a receiving trunking terminal, and the initiated terminal is a receiving terminal.
In order to improve the security of data transmission, the authentication application data packet is encrypted by using a secret key, and at least comprises an MAC address and authentication information.
The symmetric encryption algorithm can be adopted, and the transceiver independently have the secret key, so that the communication security is ensured, and the encryption speed is high. Meanwhile, both communication parties save the same secret key, and the secret key does not need to be transmitted during communication, so that the security risk of secret key leakage of a symmetric encryption technology is avoided. The double insurance of communication encryption is realized, and the purpose of the transmission safety of the Bluetooth file is achieved.
The sending end also marks the data to be sent with an emergency level, and in the data transmission link negotiation step, the emergency level of the data to be sent, the data size and the number of the cluster terminals searched by the sending end and the receiving end are weighted and calculated to obtain the number N of the data transmission links. The data transmission link number N is not greater than the minimum of the sending trunking terminal number and the receiving trunking terminal number, which is the most basic premise, and meanwhile, the maximum value of N may be obtained only when the emergency level is higher or the data size is larger or both are satisfied, and when the emergency level is lower and the data size is smaller, an idle transmission link should be reserved for transmitting other data.
According to the scheme, weighting calculation is carried out by combining parameters such as the available quantity of cluster terminals of both communication sides, the emergency degree of data, the size of the data and the like, so that the resource utilization maximization is realized, and the data transmission rate under the narrow-band cluster condition is effectively improved.
In the data receiving step, N receiving cluster terminals are adopted to correspondingly receive N data sub-packets forwarded by the base station one by one, and the N receiving cluster terminals send the received data sub-packets to a receiving end.
Because abnormal interruption of individual data transmission links and abnormal conditions of data packets occur when a plurality of cluster terminals participate in transmission, in order to avoid the above conditions causing the failure of correct data transmission, the following scheme is adopted in the data transmission process in the scheme:
before data sub-packet transmission, a sending end 1 sends a file size and a file check code to a receiving end 2, and the receiving end 2 calculates the theoretical time of arrival of each data packet by combining the number N of links and the file size.
Each data sub-packet carries a packet number and a file check code of the sub-packet in the transmission process.
In the data receiving process, the receiving end 2 judges the missing condition of the data sub-package according to the theoretical arrival time, and informs the sending end 1 to redistribute and send the data sub-package for the second time in time.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions.
Claims (10)
1. A narrowband trunking terminal data transmission method is characterized by comprising the following steps:
a step of establishing data transmission links, namely establishing N data transmission links between cluster terminals, wherein two ends of each data transmission link are respectively a sending cluster terminal and a receiving cluster terminal, the sending cluster terminal is a cluster terminal of a sending end, the receiving cluster terminal is a cluster terminal of a receiving end, and N is a positive integer;
a data sending step, in which the sending end unpacks data to be sent into N data sub-packets, and respectively sends the N data sub-packets to N sending cluster terminals, and the N sending cluster terminals send the received data sub-packets to a receiving cluster terminal through respective corresponding data transmission links;
and a data receiving and restoring step, wherein the receiving cluster terminal sends the received data sub-packets to the receiving end, and the receiving end groups and packs all the data sub-packets and restores the data sub-packets into one data packet.
2. The narrowband trunking terminal data transmission method of claim 1, wherein the step of establishing the data transmission links further comprises a step of negotiating and confirming the number N of the data transmission links, and the transmitting end and the receiving end negotiate and confirm the number N of the data transmission links according to the number of transmitting trunking terminals and the number of receiving trunking terminals that can be searched respectively, wherein the number N of the data transmission links is not greater than the minimum value of the number of transmitting trunking terminals and the number of receiving trunking terminals.
3. The narrowband trunking terminal data transmission method of claim 2, wherein negotiating the number of confirmed data transmission links, N, comprises:
the sending end firstly sends a request for establishing a data transmission link to a receiving end through one sending cluster terminal, and the sending cluster terminal sends the request to a receiving cluster terminal;
after receiving the request for establishing the data transmission link, the receiving cluster terminal sends the request to a receiving end;
after receiving the request for establishing the data transmission link, the receiving end searches all the surrounding receiving cluster terminals, and transmits the number of the searched receiving cluster terminals back to the sending end, and the sending end confirms the number N of the data transmission links.
4. The narrowband trunking terminal data transmission method according to claim 3, wherein the sending end searches all the sending trunking terminals around the sending trunking terminal after receiving the information returned by the receiving end, and finally determines the number N of data transmission links by combining the number of the receiving trunking terminals.
5. The narrowband trunking terminal data transmission method of claim 4, wherein the sending end further comprises establishing a trunking terminal mapping table of the data transmission link, and sending the mapping table to the receiving end.
6. The narrowband trunking terminal data transmission method of claim 2, wherein in the step of establishing the data transmission link, the transmitting end and the receiving end respectively search their respective surrounding trunking terminals through bluetooth.
7. The narrowband trunking terminal data transmission method of claim 6, wherein in the step of establishing the data transmission link, after the transmitting end and the receiving end search their respective trunking terminals, the method further comprises a bluetooth pairing step:
the initiating terminal sends an authentication application data packet to the initiated terminal;
after receiving the authentication application data packet, the initiated end authenticates the initiating end, and after the authentication is passed, sends an authentication reply to the initiating end and enables automatic pairing;
the initiating terminal receives the authentication reply and initiates a pairing request;
after receiving the pairing request, the initiated end judges whether the pairing request is initiated by the authenticated equipment, if so, the pairing is automatically carried out, and the initiating end is informed; if the device is not authorized, the pairing is refused, and the automatic pairing function is closed;
the initiating terminal is a sending terminal, the initiated terminal is a sending trunking terminal, or the initiating terminal is a receiving trunking terminal, the initiated terminal is a receiving trunking terminal, or the initiating terminal is a receiving trunking terminal, and the initiated terminal is a receiving terminal.
8. The narrowband trunking terminal data transmission method of claim 7 wherein the authentication application data packet is encrypted with a key, and the authentication application data packet at least comprises a MAC address and authentication information.
9. The narrowband trunking terminal data transmission method of claim 1, wherein the sending end further marks the data to be sent with an emergency level, and the data transmission link negotiation step further comprises performing weighted calculation on the emergency level and the data size of the data to be sent and the number of trunking terminals searched by the sending end and the receiving end to obtain the number N of data transmission links.
10. The narrowband trunking terminal data transmission method of claim 1, wherein in the data receiving step, N receiving trunking terminals are used to receive N data sub-packets forwarded by the base station in a one-to-one correspondence manner, and the N receiving trunking terminals send the received data sub-packets to the receiving end.
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| CN201911398904.3A CN111132383B (en) | 2019-12-30 | 2019-12-30 | Data transmission method for narrow-band cluster terminal |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140269722A1 (en) * | 2013-03-18 | 2014-09-18 | Fujitsu Limited | Communication method, communication device, and communication system |
| CN108235373A (en) * | 2017-12-30 | 2018-06-29 | 广东欧珀移动通信有限公司 | terminal wireless data transmission method, device, terminal and storage medium |
| CN110418376A (en) * | 2019-07-29 | 2019-11-05 | 国广东方网络(北京)有限公司 | Data transmission method and device |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140269722A1 (en) * | 2013-03-18 | 2014-09-18 | Fujitsu Limited | Communication method, communication device, and communication system |
| CN108235373A (en) * | 2017-12-30 | 2018-06-29 | 广东欧珀移动通信有限公司 | terminal wireless data transmission method, device, terminal and storage medium |
| CN110418376A (en) * | 2019-07-29 | 2019-11-05 | 国广东方网络(北京)有限公司 | Data transmission method and device |
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