CN106230538B - A kind of point-to-point time-division two-way wireless communication method of single carrier - Google Patents
A kind of point-to-point time-division two-way wireless communication method of single carrier Download PDFInfo
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- CN106230538B CN106230538B CN201610603663.1A CN201610603663A CN106230538B CN 106230538 B CN106230538 B CN 106230538B CN 201610603663 A CN201610603663 A CN 201610603663A CN 106230538 B CN106230538 B CN 106230538B
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- data frame
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/001—Synchronization between nodes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/02—Details
- H04J3/06—Synchronising arrangements
- H04J3/0602—Systems characterised by the synchronising information used
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/02—Details
- H04J3/06—Synchronising arrangements
- H04J3/0635—Clock or time synchronisation in a network
- H04J3/0638—Clock or time synchronisation among nodes; Internode synchronisation
- H04J3/0647—Synchronisation among TDM nodes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0446—Resources in time domain, e.g. slots or frames
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The present invention relates to a kind of point-to-point time-division two-way wireless communication methods of single carrier.Using the thinking of burst mode, frame structure is made of the present invention HEAD and DATA two parts, and wherein HEAD is mainly used for sign synchronization, can play the function of search frame；The present invention is that the carrier synchronization method based on the special words of HEAD dexterously devises bi-directional synchronization mechanism.The present invention realizes the transmitted in both directions function of single carrier point to point wireless communication system by time-multiplexed method, implementation method complexity is low, dependable performance, while upstream and downstream bandwidth distribution is flexible, is suitable for the point-to-point wireless transmission application in the fields such as image, voice and Industry Control；What the synchronizing process of the present invention was only utilized sign synchronization searches frame function, will need not just shake hands after the decoding of the data demodulation of opposite end.
Description
Technical field
The present invention relates to fields of communication technology, and in particular to a kind of point-to-point time-division two-way wireless communication method of single carrier.
Background technology
Wireless communication system realizes that two-way method mainly has time division multiplexing（TDD）And frequency division multiplexing（FDD）Two kinds.
FDD is received and transmitted on two symmetrical frequency channels of separation, and reception channel is detached with protection frequency range
With transmission channel.FDD must use pairs of frequency, carry out differentiating uplink and downlink link by frequency, unidirectional resource when
Between on be continuous.FDD can make full use of the frequency spectrum of uplink and downlink, but when supporting non-symmetrical service when supporting symmetrical service,
The availability of frequency spectrum will substantially reduce；In addition the isolation that one fixed width is also needed between uplink and downlink frequency spectrum just can guarantee that uplink and downlink is logical
Letter will not interfere with each other.At present frequency spectrum resource is nervous, especially in point-to-point transmission systematic difference field, can open and use
Frequency spectrum resource is not very sufficient.
TDD sends and receivees channel with the time to detach, and in the mobile communication system of TDD modes, sends and receivees
Using the different time-gap of same frequency carrier wave as the carrying of channel, unidirectional resource be in time it is discontinuous, when
Between resource distributed in two directions.Since the time resource of TDD modes has given uplink and downlink respectively, from folk prescription
To efficiency of transmission on for not as good as FDD system.
Invention content
For problems of the prior art, it is an object of the invention to propose that a kind of single carrier point-to-point time-division is two-way
Wireless communications method.
A kind of point-to-point time-division two-way wireless communication method of single carrier, it is characterised in that：Including proximal device and
Remote equipment；
The communication steps of proximal device are as follows：
J1 ：Proximal device enters initial transmission state；
J2 ：Proximal device transmission data frame, reception state is opened after transmission, when proximal device searches far in a seconds
The data frame that end equipment is sent reaches and once shakes hands after then waiting for remote equipment to send, and counts number of shaking hands；When a seconds
Interior proximal device does not search the data frame of remote equipment transmission, reenters step J1, while counting how many times clearing of shaking hands；
J3 ：When number of shaking hands reaches n times, then enter synchronous regime；Otherwise step J2 is repeated；
J4 ：After proximal device and remote equipment enter synchronous regime, both sides are according to synchronous time slot transmission data frame；When
Proximal device receives the data frame of remote equipment transmission in a seconds after transmission, then is sent again, synchronous regime
Continue；When the data frame for being not received by remote equipment transmission in a seconds, synchronous regime is interrupted, then repeatedly step J1；
The communication steps of remote equipment are as follows：
Y1 ：Remote equipment enters initial reception state；
Y2 ：When remote equipment search proximal device transmission data frame, wait for proximal device send after, distal end
Equipment transmission data frame, reaches after transmission and once shakes hands, and counts number of shaking hands；
Y3 ：After remote equipment is sent, reception state is opened, when the number for searching again for proximal device transmission in b seconds
According to frame, step Y2 is repeated；If not searching the data frame of proximal device transmission in b seconds, repeatedly step Y1, shakes hands simultaneously
It counts and resets；
Y4 ：When number of shaking hands reaches n times, proximally and distally enter synchronous regime；Otherwise step Y2 and Y3 are repeated；
Y5：After remote equipment enters synchronous regime, both sides are according to respective time slot transmission data frame；When distal end is sending knot
The data frame that proximal device transmission is received in the b seconds after beam, then sent again, and synchronous regime continues；Do not have when in b seconds
The data frame of proximal device transmission is received, synchronous regime is interrupted, then repeatedly step Y1.
A kind of point-to-point time-division two-way wireless communication method of single carrier, it is characterised in that：The proximal device
Original state is defaulted as transmission state, and the original state of the remote equipment is defaulted as reception state.
A kind of point-to-point time-division two-way wireless communication method of single carrier, it is characterised in that：The proximal device and
The remote equipment is that transmission state and reception state do not exist simultaneously.
A kind of point-to-point time-division two-way wireless communication method of single carrier, it is characterised in that：The a and b is root
It is configured according to communication requirement.
A kind of point-to-point time-division two-way wireless communication method of single carrier, it is characterised in that：The N is according to channel
Environment is configured.
A kind of point-to-point time-division two-way wireless communication method of single carrier, it is characterised in that：The knot of the data frame
Structure includes HEAD and DATA.
A kind of point-to-point time-division two-way wireless communication method of single carrier, it is characterised in that：The proximal device and
The method of remote equipment searching and detecting data frame is all based on the carrier synchronization method of the special words of HEAD.
Beneficial effects of the present invention are：
1. the present invention realizes the transmitted in both directions work(of single carrier point to point wireless communication system by time-multiplexed method
Can, implementation method complexity is low, dependable performance, while upstream and downstream bandwidth distribution is flexible, is suitable for image, voice and Industry Control
The point-to-point wireless transmission application in equal fields；
2. what the synchronizing process of the present invention was only utilized sign synchronization searches frame function, need not be by the data demodulation of opposite end
Just shake hands after decoding because the sensitivity of sign synchronization is far above the sensitivity of data, when in complicated wireless environment or
Transmission range reaches capacity, and error code have occurred in data, and sign synchronization can also work normally；
3. the parameter flexible configuration of proximal device and remote equipment, including the time span that respectively sends every time, modulate mould
Formula etc., the channel application especially suitable for asymmetric code check；
4. what synchronization mechanism utilized is the carrier synchronization of HEAD, more complex time calibration is avoided, and same with carrier wave
The method of step also can flexibly be suitable for different operating distances；
5. the present invention greatly improves spectrum utilization efficiency, reduces product area and reduces power consumption.
Specific implementation mode
The present invention is described in detail below.
Using the thinking of burst mode, frame structure is made of the present invention HEAD and DATA two parts, wherein HEAD master
It is used for sign synchronization, the function of search frame can be played；The present invention is that the carrier synchronization method based on the special words of HEAD is ingenious
Ground devises bi-directional synchronization mechanism.
Time division multiplexing（TDD）Key point synchronous on time slot, each leisure that is that proximal device will be accomplished with remote equipment
The one's own time sends signal, and signal is received in the time of setting, this requires that equipment is in electricity initialization or transmission
There are one the processes for entering synchronous regime for proximal device and remote equipment energy when way occurs abnormal.
Synchronization mechanism is exactly to be shaken hands by frame synchronization several times, and proximal device and remote equipment is allowed to enter time division synchronous state,
Avoid the occurrence of the case where remote equipment and proximal device all stop sending or sending simultaneously.
A and b in the present invention are configured according to communication requirement, and N is configured according to channel circumstance.Proximal end is set
For standby and remote equipment before entering synchronous regime, the data frame sign of transmission is one data frame of a time slot；Into synchronization
After state, a time slot can continuously transmit multiple data frames, and quantity can configure according to demand.
The thinking of bi-directional mechanism of the present invention is：
1）Proximal device and remote equipment are that transmission state and reception state do not exist simultaneously；
2）Proximal device initial default sends state, remote equipment initial default reception state；
3）It only after detecting the frame head that opposite end is sent, then is delayed after the length of a data frame, opens and send shape
State；
4）Both sides reach after n times shake hands, into synchronous regime；
5）When synchronization mechanism when the error occurs, both ends are returned to default conditions.
The communication steps of proximal device are as follows：
J1 ：Proximal device enters initial transmission state；
J2 ：Proximal device transmission data frame, reception state is opened after transmission, when proximal device searches far in a seconds
The data frame that end equipment is sent reaches and once shakes hands after then waiting for remote equipment to send, and counts number of shaking hands；When a seconds
Interior proximal device does not search the data frame of remote equipment transmission, reenters step J1, while counting how many times clearing of shaking hands；
J3 ：When number of shaking hands reaches n times, then enter synchronous regime；Otherwise step J2 is repeated；
J4 ：After proximal device and remote equipment enter synchronous regime, both sides are according to synchronous time slot transmission data frame；When
Proximal device receives the data frame of remote equipment transmission in a seconds after transmission, then is sent again, synchronous regime
Continue；When the data frame for being not received by remote equipment transmission in a seconds, synchronous regime is interrupted, then repeatedly step J1；
The communication steps of remote equipment are as follows：
Y1 ：Remote equipment enters initial reception state；
Y2 ：When remote equipment search proximal device transmission data frame, wait for proximal device send after, distal end
Equipment transmission data frame, reaches after transmission and once shakes hands, and counts number of shaking hands；
Y3 ：After remote equipment is sent, reception state is opened, when the number for searching again for proximal device transmission in b seconds
According to frame, step Y2 is repeated；If not searching the data frame of proximal device transmission in b seconds, repeatedly step Y1, shakes hands simultaneously
It counts and resets；
Y4 ：When number of shaking hands reaches n times, proximally and distally enter synchronous regime；Otherwise step Y2 and Y3 are repeated；
Y5：After remote equipment enters synchronous regime, both sides are according to respective time slot transmission data frame；When distal end is sending knot
The data frame that proximal device transmission is received in the b seconds after beam, then sent again, and synchronous regime continues；Do not have when in b seconds
The data frame of proximal device transmission is received, synchronous regime is interrupted, then repeatedly step Y1.
Claims (5)
1. a kind of point-to-point time-division two-way wireless communication method of single carrier, it is characterised in that：Including proximal device and remote equipment；
The communication steps of proximal device are as follows：
J1 ：Proximal device enters initial transmission state；
J2 ：Proximal device transmission data frame, reception state is opened after transmission, when in a seconds proximal device search distal end set
The data frame that preparation is sent reaches and once shakes hands after then waiting for remote equipment to send, and counts number of shaking hands；When close in a seconds
End equipment does not search the data frame of remote equipment transmission, reenters step J1, while counting how many times clearing of shaking hands；
J3 ：When number of shaking hands reaches n times, then enter synchronous regime；Otherwise step J2 is repeated；
J4 ：After proximal device and remote equipment enter synchronous regime, both sides are according to synchronous time slot transmission data frame；Work as proximal end
Equipment received in a seconds after transmission remote equipment transmission data frame, then sent again, synchronous regime after
It is continuous；When the data frame for being not received by remote equipment transmission in a seconds, synchronous regime is interrupted, then repeatedly step J1；
The communication steps of remote equipment are as follows：
Y1 ：Remote equipment enters initial reception state；
Y2 ：When remote equipment search proximal device transmission data frame, wait for proximal device send after, remote equipment
Transmission data frame reaches after transmission and once shakes hands, and counts number of shaking hands；
Y3 ：After remote equipment is sent, reception state is opened, when the data for searching again for proximal device transmission in b seconds
Frame repeats step Y2；If not searching the data frame of proximal device transmission, repeatedly step Y1, while meter of shaking hands in b seconds
Number is reset；
Y4 ：When number of shaking hands reaches n times, proximally and distally enter synchronous regime；Otherwise step Y2 and Y3 are repeated；
Y5 ：After remote equipment enters synchronous regime, both sides are according to respective time slot transmission data frame；When distal end is terminated in transmission
The data frame that proximal device transmission is received in the b seconds afterwards, then sent again, and synchronous regime continues；It is not connect when in b seconds
The data frame of proximal device transmission is received, synchronous regime is interrupted, then repeatedly step Y1；
The structure of the data frame includes HEAD and DATA；The method of the proximal device and remote equipment searching and detecting data frame
It is all based on the carrier synchronization method of the special words of HEAD；The HEAD is used for sign synchronization, realizes the function of search frame.
2. a kind of point-to-point time-division two-way wireless communication method of single carrier according to claim 1, it is characterised in that：It is described
The original state of proximal device is defaulted as transmission state, and the original state of the remote equipment is defaulted as reception state.
3. a kind of point-to-point time-division two-way wireless communication method of single carrier according to claim 1 or 2, it is characterised in that：
The proximal device and the remote equipment are that transmission state and reception state do not exist simultaneously.
4. a kind of point-to-point time-division two-way wireless communication method of single carrier according to claim 1, it is characterised in that：It is described
A and b is configured according to communication requirement.
5. a kind of point-to-point time-division two-way wireless communication method of single carrier according to claim 1, it is characterised in that：It is described
N is configured according to channel circumstance.
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| CN201610603663.1A CN106230538B (en) | 2016-07-28 | 2016-07-28 | A kind of point-to-point time-division two-way wireless communication method of single carrier |
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| CN201610603663.1A CN106230538B (en) | 2016-07-28 | 2016-07-28 | A kind of point-to-point time-division two-way wireless communication method of single carrier |
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| CN107124753B (en) * | 2017-07-01 | 2020-06-02 | 国仪行云(合肥)教育科技有限公司 | Bidirectional communication method for wireless terminal |
| CN109586829A (en) * | 2018-11-12 | 2019-04-05 | 北京邮电大学 | The method for synchronizing time and system communicated based on end-to-end molecule |
| CN109561396B (en) * | 2018-12-13 | 2021-03-02 | 浙江天则通信技术有限公司 | Data transmission system for robot |
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| US9247512B2 (en) * | 2011-08-25 | 2016-01-26 | Ubiquiti Networks | Adaptive synchronous protocol for minimizing latency in TDD systems |
| CN102946304B (en) * | 2012-10-10 | 2015-11-18 | 广州海格天立通信息技术有限公司 | The time division duplex transmission method of digital handset |
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