CN105025567B - The method that device communicates device is carried out between two communication devices - Google Patents
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Abstract
The invention discloses a kind of to carry out the method that device communicates device between two communication devices, and multiple resource groups and multiple synchronizing signals can be used.It determines to be relevant to the first monitoring period of transmission data first and is relevant to the second monitoring period for receiving data, and each set of resources is not connected to a corresponding synchronizing signal, corresponding first monitoring period and corresponding second monitoring period.In first communication device after choosing a particular sync signal in multiple synchronizing signals, only when corresponding first listening period and the judgement of the second listening period have no any other device and transmitting the synchronizing signal being selected, just the synchronizing signal being selected can be transmitted to advocate the right to use of corresponding resource group in corresponding first listening period, then transfer data to secondary communication device using first resource group.Therefore, the invention can avoid data collision occurs when the method communicated to device in progress device.
Description
Technical field
The present invention relates to a kind of between two communication devices, which carries out method that device communicates device more particularly to one kind, makes
Synchronizing signal is monitored to carry out the method that device communicates device between two communication devices with carrier sense technology.
Background technology
In a wireless communication system, two communication devices can be communicated with other side indirectly by a base station, or logical
Device is crossed directly to carry out data transmission the communication pattern of device (device-to-device, D2D) with other side.Device is to device
Both of which can be used in framework, and to distribute resource, (resource allocation) ﹕ network-sides dominant patterns or user terminal are leading
Pattern.
Under network-side dominant pattern, when two communication devices (in coverage) and are thought in the coverage area of base station
When carrying out device and being communicated to device, base station can give required resource allocation to the two communication devices.If however, base station mistake
In busy or inadequate resource, it is likely to result in transmission delay, reduces the data transmission efficiency carried out when device communicates device.
In addition, the area coverage of network-side dominant pattern is limited, can not apply when communication device is except the coverage area of base station
The case where (out-off coverage).
It, can be from resource pool when two communication devices, which want progress device, to be communicated to device under user terminal dominant pattern
Specific resources are selected to carry out data transmission in (resource pool).In the case where no base station controls, communication device needs root
(carrier sense multiple access/collision are detected according to Carrier Sense Multiple Access/conflict
Detection, CSMA/CD) or Carrier Sense Multiple Access/conflict avoidance (carrier sense multiple access/
Collision avoidance, CSMA/CA) etc. competition mechanisms strive for resource, to avoid when device communicates device
The case where data collision (data collision).The prior art device under device communication construction, communication device is held
Capable carrier sense is that whether have the data that other devices are spread out of to reduce conflict probability, for device pair by monitoring on network
Device communicates the generated cyclical transmission of application in terms of voice, and carrier sense is not efficient resource allocation side
Formula.In addition, device communicates random (ad-hoc) characteristic under user terminal dominant pattern to device causes a kind of concealed terminal point
(hidden terminal) problem, namely ought each other transmission range in first communication device and secondary communication device do not think
When transferring data to same third communication device simultaneously, it will clash and interfere.
Therefore, device is communicated for the device carried out between two communication devices in wireless communication system, having in fact must
It is proposed a kind of low transmission delay, high spectrum service efficiency and the high network coverage resource distribution mode.
Invention content
In view of the above-mentioned problems of the prior art, the main purpose of the present invention is to provide one kind between two communication devices into
Luggage sets the method communicated to device, passes through a kind of low transmission delay of offer, high spectrum service efficiency and the high network coverage
When to avoid the method communicated to device in progress device data collision occurs for resource distribution mode.
For achieve the above purposes, the present invention provides a kind of side for carrying out device between two communication devices and being communicated to device
Method comprising multiple resource groups are provided and multiple Tong step Xin ﹔ determine one first monitoring period and phase that are relevant to transmission data
A resource group in the multiple resource group is connected to the multiple synchronizing signal by ﹔ between when about one the 2nd prison control for receiving data
In a synchronizing signal, first monitoring period and it is described second prison control when between mono- communication devices of ﹔ judge whether there is other devices
It is transmitting the Tong step Xin ﹔ and is transmitting the synchronizing signal when communication device judgement has no any device
When, the synchronizing signal is transmitted to advocate the right to use of the resource group.
Description of the drawings
Fig. 1 is the schematic diagram of one wireless communication system of the embodiment of the present invention.
Fig. 2 is the functional block diagram of one electronic device of the embodiment of the present invention.
Fig. 3 is a kind of method flow for carrying out device between two communication devices and being communicated to device in the embodiment of the present invention
Figure.
Fig. 4 is the schematic diagram for carrying out device in the embodiment of the present invention between two communication devices and being communicated to device.
Wherein, the reference numerals are as follows：
10 network-sides
20 electronic devices
100 wireless communication systems
200 processing units
210 storage elements
214 program codes
220 communications interface units
300~390 steps
F0~F6 carrier wave frequency ranges
T0~T9 subframes
RB1~RB3Resource block
SS1~SS3Synchronizing signal
UE1~UE6 communication devices
TX1~TX3、TY1~TY3Time point
Specific implementation mode
Fig. 1 is the schematic diagram of one wireless communication system 100 of the embodiment of the present invention.Wireless communication system 100 can briefly by
One network-side 10 and multiple communication devices are formed.Transmission end communication device device communicate for desired progress device with
One receiving terminal communication device, the present invention can be initialized by network-side 10 or the assistance of transmission end communication device, such as peer discovery
(peer discovery), resource allocation, and/or establish connection etc..It is worth noting that, what peer discovery or foundation connected
Mode does not limit scope of the invention.
In Fig. 1, SS1~SS3Represent a transmission end communication device and receiving terminal communication dress in wireless communication system 100
Set the used synchronizing signal when carrying out device and being communicated to device, and TX1~TX3And TY1It represents transmission end communication device or connects
Receiving end communication device transmits the time point of synchronizing signal.Each communication device carries out device pair in wireless communication system 100 of the present invention
The mode of device communication will be described in detail in specification subsequent content.
In an embodiment of the present invention, network-side 10 can be a Universal Mobile Communication System (universal mobile
Telecommunications system, UMTS) include multiple base stations (node-B, NB) a general land wireless access
Network (universal terrestrial radio access network, UTRAN).In an alternative embodiment of the invention,
Network-side 10 can be a long term evolution (long term evolution, LTE) system, an advanced long term evolution (LTE-
Advanced, LTE-A) the advanced version of system or advanced long evolving system includes multiple evolved base station (evolved-
NB, eNB) and/or relay station an evolved universal terrestrial access network (evolved UTRAN, E-UTRAN).At this
It invents in another embodiment, network-side 10 can be to meet the Institute of Electrical and Electronics Engineers (IEEE) (Institute of Electrical
And Electronics Engineers, IEEE) wireless communication standard a wireless communication system in a base station.It is worth note
Meaning, the type of network-side 10 do not limit scope of the invention.
In embodiments of the present invention, each communication device can be mobile phone, personal digital assistant (personal
Digital assistant, PDA), hand-held (handheld) computer, tablet (tablet) computer, mini desktop
(nettop) computer, notes type (laptop) computer or other portable electronics for having device to device communication function
Device.In other embodiments of the present invention, each communication device is alternatively desktop computer, set-top box, network-side application apparatus,
Or other fixed electronic devices for having device to device communication function.For convenience of description, Fig. 1 only shows 6 communication dresses
Set UE1~UE6.It is worth noting that, the type and quantity of communication device do not limit scope of the invention.
Fig. 2 is the functional block diagram of one electronic device 20 of the embodiment of the present invention.Electronic device 20 includes a processing unit
200, a storage element 210 and a communications interface unit 220, can be used to implement the communication device UE1 of wireless communication system 100~
UE6.Processing unit 200 can be a microprocessor (microprocessor) or an application-specific integrated circuit (application
specific integrated circuit,ASIC).210 memory of storage element, one program code 214, processing unit 200 can
Program code 214 is read and executed by storage element 210.In embodiments of the present invention, storage element 210 includes but unlimited
In subscriber identification module (subscriber identity module, SIM), read-only memory (read-only memory,
ROM), flash memory (flash memory), random access memory (random-access memory, RAM), CD, tape, hard
Disk or optical data storage device etc..Communications interface unit 220 can be a wireless transceiver, can be according to processing unit 200
Handling result communicates to transmit or receive data device to carry out device.
Fig. 3 is a kind of method flow for carrying out device between two communication devices and being communicated to device in the embodiment of the present invention
Figure.Flow chart shown in Fig. 3 can be compiled into program code 214 comprising following steps：
Step 300：Multiple resource groups and multiple synchronizing signals are provided, and determine multiple first prisons for being relevant to transmission data
It listens the time and is relevant to ﹔ execution steps 310 Jian the multiple second monitorings Shi for receiving data.
Step 310：When each set of resources is not connected to a corresponding synchronizing signal, corresponding first monitoring
Between and one corresponding second monitor Shi Jian ﹔ and execute step 320.
Step 320：Transmission end communication device chooses a particular sync signal from multiple synchronizing signals, executes step 330.
Step 330：Transmission end communication device is judged whether there is in corresponding first listening period and the second listening period
Other devices are transmitting the Tong step Xin ﹔ being selected if so, executing step 340 ﹔ if it is not, executing step 350.
Step 340：Transmission end communication device chooses the other Tong step Xin ﹔ execution steps for being different from particular sync signal
330。
Step 350：Transmission end communication device transmits the synchronizing signal being selected with master in corresponding first listening period
The Shi Yong Quan ﹔ for opening corresponding resource group execute step 360.
Step 360：Transmission end communication device monitor multiple resource groups with judge whether there is the use of other devices
The corresponding Zi Yuan Zu ﹔ of the right to use have been advocated if so, executing step 340 ﹔ if it is not, executing step 370.
Step 370：Transmission end communication device is using having advocated that the resource group of the right to use carrys out the defeated Shuo Ju ﹔ of Chuan and execute step 380.
Step 380：Receiving terminal communication device judges communicated whether corresponding first listening period detects transmission end
The Tong step Xin ﹔ that device transmits are if so, execute step 390 ﹔ if it is not, executing step 380.
Step 390：Receiving terminal communication device receives data using the resource group for being relevant to received synchronizing signal, and
Corresponding second listening period transmits the synchronizing signal transmitted from transmission end communication device.
In step 300 and 310, when the transmission end communication device and receiving terminal communication device of wireless communication system 100 exist
When progress device communicates device, synchronizing signal SS can be used1~SSMTwo communication devices are synchronized, resource group R can be used1~RM
Come transmit/receive data, can be in the time point TX of monitoring1~TXMAnd TY1~TYMWhether detecting has other devices transmitting
Corresponding synchronizing signal SS1~SSM.Wherein, M is the positive integer more than 1.
Fig. 4 is the schematic diagram that step 300 and 310 modes are executed in the embodiment of the present invention.Wireless communication system 100 of the present invention
Orthogonal frequency division multiplexing (orthogonal frequency division multiplexing, OFDM) technology can be used, make
Bandwidth resources can be considered by frequency and it is time-interleaved made of resource block (resource block, RB), each resource block
The minimum bandwidth resource units of different communication device are allocated to, and the same time is only capable of using to single communication device.In Fig. 4
Shown in embodiment, transmission time can be divided into the identical multiple successive frames (frame) of length by the present invention, and by transmission bandwidth
It is divided into multiple carrier wave frequency range F0~F6 of same size.Each frame all includes 10 subframe T0~T9, the monitoring in each frame
Time point TX1~TXMAnd TY1~TYMTime point in specific sub-frame, wherein TX can be corresponded into subframe T0~T91≠TY1, TX2
≠TY2..., TXM≠TYM.It is worth noting that, the framework of 100 used bandwidth resources of wireless communication system does not limit this hair
Bright scope.
In the embodiment of M=3 shown in Fig. 4,3 resource group R can be used in wireless communication system 100 altogether1~R3, Mei Yizi
Source group may include one or more resource blocks.Resource group R1Link to synchronizing signal SS1, monitor time point TX1With the time of monitoring
Point TY1Comprising 4 resource block RB1, respectively represent workable carrier wave frequency range F2~F5 in the subframe T2 of each frame.Resource
Group R2Link to synchronizing signal SS2, monitor time point TX2With the time point TY of monitoring2Comprising 5 resource block RB2, respectively
Represent in the subframe T0 of each frame workable carrier wave frequency range F2~F3 and in subframe T6 workable carrier wave frequency range F1~
F3.Resource group R3Link to synchronizing signal SS3, monitor time point TX3With the time point TY of monitoring3Comprising 7 resource blocks
RB3, respectively represent workable carrier wave frequency range F5~F6, the workable carrier frequency in subframe T6 in the subframe T3 of each frame
Section F4~F6, and workable carrier wave frequency range F3~F4 in subframe T8.
Assuming that in step 300 by the time point TX of monitoring1~TX3It is set as corresponding to subframe T0, and by the time point of monitoring
TY1~TY3It is set as corresponding to subframe T5, each communication device can go whether detecting there are other dresses in the subframe T0 of each frame at this time
It sets and is transmitting synchronizing signal SS1~SS3It is relevant to transmission data, and it is other detecting to be gone whether to have in the subframe T5 of each frame
Device is transmitting synchronizing signal SS1~SS3.In an embodiment of the present invention, transmission end communication device can be related in each frame
Detecting is gone to be connected to all resource group R in the identical listening period of transmission data1~RMSynchronizing signal SS1~SSM(namely TX1
=TX2=...=TXM), and the identical listening period that reception data can be relevant in each frame goes detecting to be connected to all resources
Group R1~RMSynchronizing signal SS1~SSM(namely TY1=TY2=...=TYM).In other embodiments of the present invention, transmission end is logical
The different listening periods that T unit can be relevant to transmission data in each frame go detecting to be connected to all resource group R1~RMIt is same
Walk signal SS1~SSM(namely TX1~TXMCan have specific sequencing), and can be relevant in each frame and receive data not
Detecting is gone to be connected to all resource group R with listening period1~RMSynchronizing signal SS1~SSM(namely TY1~TYMCan have specific elder generation
Sequence afterwards).It is worth noting that, being connected to resource group R1~RMMonitoring time point TX1~TXMAnd TY1~TYMIts priority is suitable
Sequence does not limit scope of the invention.
In step 320, transmission end communication device can choose a particular sync signal.For example, transmission end communication dress
Setting can be from synchronizing signal SS1~SSMOne m synchronizing signals SS of middle selectionm.Wherein, m is positive integer, and 1≤m≤M.
In a step 330, transmission end communication device determines whether that other devices are transmitting the synchronous letter being selected
Number.More particularly, communication device can be in the time point TX of the monitoring of each frame1~TXMAnd TY1~TYMWhether detect respectively has
Other devices are transmitting synchronizing signal SS1~SSMIn the m synchronizing signals SS that is selectedm。
If the time point TX of monitoring of the transmission end communication device in a first framemAnd TYmAll other devices are not being detected just
In transmission m synchronizing signals SSm, can judge that m resource groups R is used in no any device in a step 330 at this timemTo send out
It send data or receives data, can then execute step 350 to transmit the synchronizing signal being selected to advocate corresponding resource group
The right to use.For example, transmission end communication device can be in the time point TX of the monitoring in the second subframe of then the first subframemIt passes
Send m synchronizing signals SSm, and then occupied m resource groups R to the declaration of other communication devicesmThe right to use.
On the other hand, if transmission end communication device detects the time point TX of monitoring of other devices in a first framem
Or TYmTransmitting m synchronizing signals SSm, can judge that having other devices is used m resource groups in a step 330 at this time
RmCarry out transmission data or receive data, can then execute step 340 to choose the other synchronous letters for being different from particular sync signal
Number, such as m values are updated in 1~M other arbitrary integers other than m, step 330 is then executed again.Until judging
After there is no any device transmitting the synchronizing signal being selected, can just transmit in step 350 the synchronizing signal that is selected with
Advocate the right to use of corresponding resource group.
If two transmission end communication devices execute step 320 and 330 with the time, may obtain being selected synchronous letter together
Number and the judging result that is not used by, and then 350 all in step in advocate the right to use of same resource group simultaneously.If this two
A transmission end user apparatus is then all with same resource group come transmission data, it will causes data collision.Therefore, logical in transmission end
T unit transmits m synchronizing signals SS in step 350mTo advocate m resource groups RmThe right to use after, separately can be in step 360
Monitor resource group R1~RMM resource groups R is used to judge whether there is other devicesm.If finding there is it in step 360
M resource groups R is used in its devicemWhen, transmission end communication device can abandon previously having advocated the resource group R of the right to usem, and
Step 340 and 330 is executed with the other synchronizing signals of selection/judgement.No any device is only reaffirmed in step 360 just
Using m resource groups RmWhen, transmission end communication device can just execute step 370 to use m resource groups RmCarry out transmission data.
In step 380, receiving terminal communication device determines whether to detect the synchronous letter that transmission end communication device transmits
Number, such as judge whether the time point TX of the monitoring in a third framemDetect m synchronizing signals SSm.Third frame is second
Arbitrary frame namely receiving terminal communication device after frame can continue the detecting synchronizing signal of the listening period in each frame.If energy
The time point TX of monitoring in third subframemM synchronizing signals are detected, receiving terminal communication device then can be in step 390
It is middle to receive data, and the time point TY of the monitoring in the 4th subframe of then third subframe using m resources groupmTransmission the
M synchronizing signals SSm, and then inform that m resource groups R is used in other communication devicesmTo receive data.
It please also refer to Fig. 1 and Fig. 3.If communication device UE1 successfully uses resource group after executing step 320~370
R1To send data to communication device UE2, communication device UE1 can continue during progress device communicates device in each frame
Interior time point TX1Transmit the 1st synchronizing signal SS1To adjacent communication device UE2 and UE5.When communication device UE2 is in present frame
Monitoring time point TX1Detect the 1st synchronizing signal SS1When, you can use resource group R1It is transmitted to receive communication device UE1
Data, and the persistently time point TY in each frame during carrying out device and communicate to device1Transmit the 1st synchronizing signal SS1
To adjacent communication device UE1 and UE3.If communication device UE3 wants to carry out device to device communication to send data to communication dress
Set UE4, but the time point TY of the monitoring in present frame1Detect the 1st synchronizing signal SS1When, you can learn other communication dresses
It sets and resource group R is used1Receive data, therefore communication device UE3 (after executing step 320~370) can use resource
Group R2To send data to communication device UE4, and the lasting time in each frame during carrying out device and being communicated to device
Point TX2Transmit the 2nd synchronizing signal SS2To adjacent communication device UE2 and UE4.If communication device UE5 wants to carry out device to device
Communication is to send data to communication device UE6, but the time point TX of the monitoring in present frame1Detect the 1st synchronizing signal SS1
When, you can learn that resource group R is used in other communication devices1Carry out transmission data, therefore communication device UE5 (is executing step
After rapid 320~370) resource group R can be used3To send data to communication device UE6, and the phase communicated to device in progress device
Between continue time point TX in each frame3Transmit the 3rd synchronizing signal SS3To adjacent communication device UE1 and UE6.
The present invention monitors synchronizing signal using carrier sense technology so that each communication device can judge can be utilized for
The resource group that device communicates device.Specific communication devices successfully advocate the right to use/using specific resources group during, can hold
Supervention send corresponding synchronizing signal to inform that other communication device specific resources groups are occupied, and then avoids that data occur
Conflict.In addition, specific resources group can be used for a period of time in communication device of the present invention, just stop sending after the completion of task opposite
The synchronizing signal answered to disengage specific resources group, therefore need not be frequently executed the detecting of Carrier Sense Multiple Access/conflict or
The competition mechanisms such as Carrier Sense Multiple Access/conflict avoidance strive for resource group.On the other hand, it is used in specific communication devices special
Resource group is determined during receiving data, can separately continue to send corresponding synchronizing signal to inform other communication devices, in turn
Avoid the problem that concealed terminal point.Therefore, for the device carried out between two communication devices in wireless communication system to dress
Set communication, the present invention can provide a kind of low transmission delay, high spectrum service efficiency and the high network coverage resource distribution mode.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, any made by repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (9)
1. a kind of carrying out method , that device communicates device it is characterized in that , Bao Kuo ﹕ between two communication devices
Multiple resource groups and multiple Tong step Xin ﹔ are provided
﹔ between when determining to be relevant to one first monitoring period of transmission data and be relevant to one the 2nd prison control for receiving data
A first resource group in the multiple resource group is connected to one first synchronizing signal in the multiple synchronizing signal, described
﹔ between when the first monitoring period and the 2nd prison control
One first communication device judge whether there is other devices transmitting the described first with step letter ﹔ and
When first communication device judgement, which has no any device, is transmitting first synchronizing signal, transmission described first
Synchronizing signal is to advocate the right to use of the first resource group.
2. the method as described in claim 1 , Qi Te sign Yu ﹕
The first communication device is that first monitoring period and second monitoring period judge whether in a first frame
There are other devices transmitting the described first with step letter ﹔
It is being passed when judging that first monitoring period and second monitoring period have no any device in the first frame
When sending first synchronizing signal, the first communication device is first monitoring period transmission described the in one second frame
One synchronizing signal with advocate the first resource group make with power ﹔ and
Second frame is the then first frame.
3. the method as described in claim 1, which is characterized in that another Bao Kuo ﹕
After the right to use for advocating the first resource group, the first communication device monitors the multiple resource group to judge to be
It is no have other devices be used the first resource Zu ﹔ and
When judging that having no any device is used the first resource group, the first communication device is provided using described first
Source group transfers data to a secondary communication device.
4. Qi Te of method , sign Yu ﹕ as claimed in claim 3
The first communication device is that first monitoring period judges whether there is other devices and transmitting in a first frame
Described first the same as step letter ﹔
After the right to use for advocating the first resource group, the first communication device be monitored in one second frame it is the multiple
Resource group with judge whether there is other devices be used the first resource Zu ﹔ and
Second frame is after the first frame.
5. method as claimed in claim 3, which is characterized in that another Bao Kuo ﹕
A period of the secondary communication device is transferred data to using the first resource group in the first communication device
Interior, first monitoring period transmits first synchronizing signal to the first communication device in all frames during described.
6. method as claimed in claim 3, another Bao Kuo ﹕
When first monitoring period detects the first communication device and transmits the secondary communication device in a first frame
After first synchronizing signal, received using the first resource group Shuo Ju ﹔ that the first resource group transmits and
The secondary communication device using the first resource group to receive data one during, the secondary communication device
Second monitoring period transmits first synchronizing signal in all frames during described.
7. method as claimed in claim 3, which is characterized in that another Bao Kuo ﹕
Using the first resource group come before transferring data to the secondary communication device,
The first communication device is synchronized using first synchronizing signal with the secondary communication device.
8. the method as described in claim 1, which is characterized in that the first communication device is described first in a first frame
Monitoring period and second monitoring period judge whether there is other devices and are transmitting first synchronizing signal, the method
Another Bao Kuo ﹕
It determines to be relevant to a third monitoring period of transmission data and is relevant to one the 4th monitoring period for receiving data, wherein institute
It is the ﹔ in one the 2nd frame of the then first frame to state third monitoring period and the 4th monitoring period
A Secondary resource group in the multiple resource group is connected to one second synchronizing signal in the multiple synchronizing signal, described
Third monitoring period and the 4th Jian control Shi Jian ﹔ and
When first monitoring period or second monitoring period judgement have the first communication device in the first frame
When one other devices are transmitting first synchronizing signal, the third monitoring period and described in then second frame
4th monitoring period judges whether there is other devices and is transmitting second synchronizing signal.
9. the method as described in claim 1, which is characterized in that the first resource group includes under an orthogonal frequency division multiplexing framework
One or more resource blocks.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US201461980586P | 2014-04-17 | 2014-04-17 | |
| US61/980,586 | 2014-04-17 |
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| TW201542024A (en) | 2015-11-01 |
| TWI549557B (en) | 2016-09-11 |
| CN105025567A (en) | 2015-11-04 |
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