CN106921471A - A kind of short-distance communication equipment - Google Patents
A kind of short-distance communication equipment Download PDFInfo
- Publication number
- CN106921471A CN106921471A CN201511003236.1A CN201511003236A CN106921471A CN 106921471 A CN106921471 A CN 106921471A CN 201511003236 A CN201511003236 A CN 201511003236A CN 106921471 A CN106921471 A CN 106921471A
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- Prior art keywords
- communication
- short
- communication equipment
- distance
- terminal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1867—Arrangements specially adapted for the transmitter end
- H04L1/188—Time-out mechanisms
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/1607—Details of the supervisory signal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1867—Arrangements specially adapted for the transmitter end
- H04L1/189—Transmission or retransmission of more than one copy of a message
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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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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
A kind of short-distance communication equipment is provided, the communication equipment includes short-range communication module, wherein, short-range communication module optionally performs One-to-one communication or one-to-many communication in short haul connection, and the inverse of the reaching time-difference of the transmission data determined according to the maximum communication distance between communication equipment will be set greater than for the sample rate of the transmission data of communication equipment of sampling.
Description
Technical field
The present invention relates to a kind of communication equipment, a kind of short-distance communication equipment is refered in particular to.
Background technology
In One-to-one communication in legacy communications system, the data that terminal sends a frame are sent, receiving terminal is by data and confirms that the ack signal being properly received of the frame is sent to transmission terminal.If data are not correctly received, receiving terminal sends NACK signal.After ack signal is properly received from receiving terminal, terminal is sent by the data is activation of next frame to receiving terminal.When receiving NACK signal from receiving terminal or being not properly received ack signal or do not receive ack signal during predetermined amount of time, the data for having been sent are possibly retransmission.
In one-to-many communication in legacy communications system, single transmission terminal transmits data to multiple receiving terminals；Send terminal and transmit data to receiving terminal using mark (ID) information of each terminal in receiving terminal.Receiving terminal checks whether id information is correct, and when id information is correct, receives data.Otherwise, the data that receiving terminal treatment is received.
The content of the invention
The present invention provides a kind of short-distance communication equipment, the speed of One-to-one communication can be realized during One-to-one communication while the protocol type of maintenance One-to-one communication has how many receiving stations without checking；Usable family is free to set One-to-one communication and one-to-many communication; and data can be protected not to be erroneously sent to not be third party's terminal of correct receiving terminal during One-to-one communication, with the safety problem for preventing from occurring because same protocol is used for both One-to-one communication and one-to-many communication.
Based on above-mentioned purpose, the present invention is adopted the following technical scheme that：A kind of short-distance communication equipment, the communication equipment includes wireless short-range communication module, the wireless short-range communication module is using the wireless short-range communication module based on ZigBee technology, One-to-one communication or one-to-many communication are optionally performed in short haul connection, and the multiple reciprocal of the reaching time-difference of the transmission data determined according to the maximum communication distance between communication equipment will be set greater than for the sample rate of the transmission data of communication equipment of sampling.
Further, be set to for sample rate reciprocal more four times greater than reaching time-difference by the wireless short-range communication module.
Further, be set to for sample rate bigger than the inverse of reaching time-difference octuple by the wireless short-range communication module.
Further, the wireless short-range communication module uses the bit for recognizing One-to-one communication or one-to-many communication in the head of transmission data.
Further, in the case of One-to-one communication, wireless short-range communication module receives transmission data, randomly produces ack signal, and the ack signal of generation is sent to the communication equipment for sending transmission data.
Further, in the case of one-to-many communication, short-range communication module receives transmission data, and the special ack signal of one-to-many communication is sent to the communication equipment for sending transmission data.
The beneficial effects of the invention are as follows：In order to perform traditional one-to-many communication, the ID of each receiving terminal of terminal recognition is sent, and according to the individually dispensed data of ID.Therefore, the data throughout of receiving terminal is proportionally lowered with the quantity of receiving terminal.Through short communication distance (for example, the distance or less distance of 5 centimetres (cm)) short haul connection in, One-to-one communication and one-to-many communication can be visually distinguished, and third party can not possibly intercept the positive data for sending during One-to-one communication.
Brief description of the drawings
The present invention is described further below in conjunction with the accompanying drawings, wherein：
Figure 1A and Figure 1B are that the signal graph with attenuating and the one-to-many communication without attenuating is shown respectively；
Fig. 2 is the signal graph for showing the situation of reception signal in one-to-many communication；
Fig. 3 shows the frame structure of short haul connection according to another embodiment of the present invention；
Specific embodiment
Hereinafter, explain that embodiments of the invention will be described in the present invention by referring to accompanying drawing.Identical label in figure represents identical element, will omit any unnecessary explanation on label.
In order to perform traditional one-to-many communication, the ID of each receiving terminal of terminal recognition is sent, and according to the individually dispensed data of ID.Therefore, the data throughout of receiving terminal is proportionally lowered with the quantity of receiving terminal.Therefore, communication speed is reduced, so that it can be favourable rather than one-to-many communication that multiple One-to-one communications are performed in some short range communication systems.
Through short communication distance (for example, the distance or less distance of 5 centimetres (cm)) short haul connection in, One-to-one communication and one-to-many communication can be visually distinguished, and third party can not possibly intercept the positive data for sending during One-to-one communication.However, that is not the situation when short communication distance is such as 30cm.In that case, when transmission terminal sends the view data for being divided into multiple frames, and receiving terminal is when receiving the Data Concurrent and sending the ack signal of data that instruction has correctly received every frame, whether third party user can receive the data (no matter he/her malice) sent by transmission terminal.In that case, undesired data are received sincerely due to third party user, therefore there may be the safety problem sent between terminal and receiving terminal.
In order to solve this problem, multiple agreement can be used.However, traditional solution may make the benefit as the non-attenuating of the characteristic of short haul connection invalid.Therefore, when using the quantity for checking receiving terminal and the conventional method to each each terminal distribution ID in communicating, communication speed is reduced with may not being avoided that.
The short haul connection of the communication distance with several tens cm is different from common communication environment in many aspects.For example, because the response speed in the absence of receiving terminal after attenuating, therefore transmission can be substantially constant.Additionally, can be substantially constant from the time of the ack signal arrival transmission terminal of receiving terminal output.
Figure 1A and Figure 1B are that the signal graph with attenuating and the one-to-many communication without attenuating is shown respectively.Figure 1A corresponds to common communication environment, and Figure 1B corresponds to short haul connection environment.Reference picture 1A, in common communication environment, caused due to attenuating has time slot 3 in receiving terminal 1 and receiving terminal 2 in terms of the signal sent by transmission terminal is received.However, reference picture 1B, due to being sent in short haul connection environment substantially smaller in the absence of the time slot 4 between attenuating, therefore receiving terminal 1 and receiving terminal 2 in terms of signal is received between terminal and receiving terminal or there's almost no.
In short haul connection, it is short due to sending the distance between terminal and receiving terminal, therefore the multipath attenuation effect for being caused due to multiple paths is small, is only primarily present the influence due to causing according to the signal sending time gap for sending the distance between terminal and receiving terminal difference.Attenuating is small to mean that the signal sent by transmission terminal arrives substantially simultaneously at each receiving terminal when there is many receiving terminals in single transmission terminal surrounding.
In communication equipment of the invention, in order that performing one-to-many communication with the multiple One-to-one communications in short range communication systems, the communication frequency for communicating is provided so that within the sample rate 50% of transmission signal of the signal arrival time difference in short range communication systems.For example, in with the short range communication systems that maximum communication distance is 30cm, assuming that spread speed is 300 meters of every microsecond (300m/ μ sec), the time difference that the signal sent by transmission terminal reaches receiving terminal 1 is 1 nanosecond (nsec) to the maximum.Even if in order in a cycle of data of the sample rate than that will the be sent four times greater such time difference being demodulated with also having no difficulty, sample rate 12.5% should be greater than 1nsec to allow receiving terminal substantially simultaneously to receive data.It is, when the time difference that the signal sent by transmission terminal reaches receiving terminal being 1nsec, the ack signal sent by receiving terminal should be received by transmission terminal, so that the time difference is 2nsec.Therefore, consider above content, when used for the sample rate that the data sent by transmission terminal are sampled is arranged to than send the signal arrival time difference between terminal and receiving terminal inverse (i.e., 1/ signal arrival time difference) four times greater (preferably) and big octuple (more preferably) when, sending terminal can be nearly simultaneously received the ack signal sent by the receiving terminal for receiving transmission data, so as to One-to-one communication or one-to-many communication can be more efficiently executed, wherein, determine the signal arrival time difference according to the distance between terminal and receiving terminal difference is sent.
In communication equipment of the invention, the signal sent by single transmission terminal is sent to multiple receiving terminals, receiving terminal is substantially simultaneously received data, and ack signal is almost sent into transmission terminal simultaneously, sends terminal and receives the ack signal sent by receiving terminal.Because the ack signal received by transmission terminal is all identical, therefore transmission terminal receives single normal ack signal with not conflicting.Therefore, the data that will be sent can be sent to receiving terminal from single transmission terminal.
Fig. 2 is the signal graph for showing the situation of reception identical signal in one-to-many communication.Reference picture 2, when receiving terminal is nearly simultaneously received sends the signal that terminal sends by multiple, complete signal is received, without signal interference.Therefore, because communication equipment of the invention is nearly simultaneously received the ack signal sent by receiving terminal, therefore the complete ack signal of terminal reception is sent, so that one-to-many communication becomes more efficient.For this purpose, each in receiving terminal needed to check the data of reception immediately, and determines whether the data for receiving are correctly received, and ack signal is sent into transmission terminal in the given time.
As shown in Figure 3, in the frame structure of the transmission data of short haul connection, represent that One-to-one communication or the bit 505 of one-to-many communication are assigned to head point 500.
Additionally, when transmitting element 410 receives data via receiving unit 420 from another transmission terminal, transmitting element 410 checks the data for receiving, and if the data for receiving are correctly received, then sends ack signal.Transmitting element 410 receives the header of the data sent by another transmission terminal via receiving unit 420, and ack signal is randomly produced when bit corresponding with One-to-one communication is checked, the ack signal for being exclusively used in one-to-many communication is sent when checking with the corresponding bit of one-to-many communication.
Receiving unit 420 receives the data sent by another transmission terminal.Receiving unit 420 receives the transmission data sent by another transmission terminal according to short haul connection via signal electrode 440, and receive by the transmission data of AFE(analog front end) (AFE) circuit 430, wherein, noise remove is performed at AFE circuitry 430 and gain is amplified.Receiving unit 420 performs the treatment opposite with the treatment of transmitting element 410, for example, by transmit data separating be in head and data, reverse diffusion tip and data each, demodulate the data of reception.Additionally, receiving unit 420 is from the transmission data separating head for receiving, and check that the data of reception are sent in One-to-one communication or in one-to-many communication by read head.The result of the inspection is provided to transmitting element 410.Transmitting element 410 is randomly produced in the case of One-to-one communication and sends ack signal, and the ack signal for being exclusively used in one-to-many communication is sent in the case of one-to-many communication.
Claims (6)
1. a kind of short-distance communication equipment, it is characterised in that：The communication equipment includes wireless short-range communication module, described wireless short
Field communication module optionally performs one using the wireless short-range communication module based on ZigBee technology in short haul connection
To a communication or one-to-many communication, and will be set greater than being set according to communication for the sample rate of the transmission data of communication equipment of sampling
The multiple reciprocal of the reaching time-difference of the transmission data that the maximum communication distance between standby determines.
2. short-distance communication equipment as claimed in claim 1, it is characterised in that the wireless short-range communication module sets sample rate
It is set to reciprocal more four times greater than reaching time-difference.
3. short-distance communication equipment as claimed in claim 1, it is characterised in that the wireless short-range communication module sets sample rate
It is set to bigger than the inverse of reaching time-difference octuple.
4. short-distance communication equipment as claimed in claim 1, it is characterised in that the wireless short-range communication module is in transmission data
Head in using for recognizing the bit of One-to-one communication or one-to-many communication.
5. short-distance communication equipment as claimed in claim 1, it is characterised in that in the case of One-to-one communication, wireless short-distance
Communication module receives transmission data, randomly produces ack signal, and the ack signal of generation is sent into transmission transmission number
According to communication equipment.
6. short-distance communication equipment as claimed in claim 1, it is characterised in that in the case of one-to-many communication, short haul connection
Module receives transmission data, and the special ack signal of one-to-many communication is sent to the communication equipment for sending transmission data.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511003236.1A CN106921471A (en) | 2015-12-28 | 2015-12-28 | A kind of short-distance communication equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511003236.1A CN106921471A (en) | 2015-12-28 | 2015-12-28 | A kind of short-distance communication equipment |
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| Publication Number | Publication Date |
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| CN106921471A true CN106921471A (en) | 2017-07-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201511003236.1A Pending CN106921471A (en) | 2015-12-28 | 2015-12-28 | A kind of short-distance communication equipment |
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| CN (1) | CN106921471A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090109913A1 (en) * | 2007-10-24 | 2009-04-30 | Eun-Tae Won | Method for transmitting/receiving data while supporting scalability in communication system |
| CN102684829A (en) * | 2011-03-08 | 2012-09-19 | 三星电子株式会社 | Communication apparatus, communication system, and communication method |
| CN103227965A (en) * | 2013-05-24 | 2013-07-31 | 吉林大学 | Android intercom system based on WiFi network |
-
2015
- 2015-12-28 CN CN201511003236.1A patent/CN106921471A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090109913A1 (en) * | 2007-10-24 | 2009-04-30 | Eun-Tae Won | Method for transmitting/receiving data while supporting scalability in communication system |
| CN102684829A (en) * | 2011-03-08 | 2012-09-19 | 三星电子株式会社 | Communication apparatus, communication system, and communication method |
| CN103227965A (en) * | 2013-05-24 | 2013-07-31 | 吉林大学 | Android intercom system based on WiFi network |
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