CN107920339A - Carry out the method and associated communication system of point-to-point communication - Google Patents
Carry out the method and associated communication system of point-to-point communication Download PDFInfo
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- CN107920339A CN107920339A CN201710171238.4A CN201710171238A CN107920339A CN 107920339 A CN107920339 A CN 107920339A CN 201710171238 A CN201710171238 A CN 201710171238A CN 107920339 A CN107920339 A CN 107920339A
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- base station
- point
- resource
- user equipment
- resource pool
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/08—Reselecting an access point
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The invention discloses a kind of communication system, it includes at least the first and second user equipmenies and the first and second base stations.First base station provides the point-to-point information in relation to the first and second base stations to the first user equipment, wherein point-to-point information includes at least the transmission resource pool of the first and second base stations, receives resource pool, and ad hoc resources pond.First user equipment can use point-to-point resource to scan the transmission resource pool of the second base station, receive resource pool or ad hoc resources pond according to resource scan criteria to obtain.First user equipment according to resource selected criteria come select the ad hoc resources pond of first base station or send resource pool in existing point-to-point resource come with second user equipment carry out point-to-point communication, or selection can carry out point-to-point communication with second user equipment with point-to-point resource.Therefore, the present invention can make user equipment maintain point-to-point service continuity during switching.
Description
Technical field
The present invention relates to a kind of method and associated communication system for carrying out point-to-point communication, more particularly to one kind can maintain clothes
It is engaged in successional Point-to-point Communication Method and associated communication system.
Background technology
In order to maintain the service quality of mobile communication and continuity, third generation partner program (3rd Generation
Partnership Project, 3GPP) specification for status of action requirement in system information block (system
Information block) add in SIB21 special resource pond (exceptional pool,
commTxPoolExceptional).Connection status, wireless link failure (radio link are switched to for idle state
Failure, RLF) and wireless heterogeneous networks (radio resource control, RRC) non-switching application such as configuration again,
Special resource pond commTxPoolExceptional is provided by current serving BS, and user equipment can be detected in advance
(pre-sense) special resource pond commTxPoolExceptional is to maintain service continuity.On the other hand, for switching
(handover) application, special resource pond commTxPoolExceptional is provided by adjacent objects base station, and user
Equipment can choose available resources to maintain service continuity from the commTxPoolExceptional of special resource pond at random.
Point-to-point (device-to-device, D2D) communication is that a kind of permission different user devices are straight by frequency spectrum resource
The technology of row point-to-point communication is tapped into, it can improve the spectrum efficiency of cellular network, reduce the transmission power of user equipment,
Solve the problems, such as that wireless communication system frequency spectrum resource is deficient to a certain extent.3GPP specifications are directed to two kinds of D2D application definitions
Transmission mode.The first D2D transmission mode is controlled by network-side, and user equipment, which has only, is receiving the D2D resources of base station transmission
After could perform D2D communication.That is, base station, which can first send D2D, is licensed to D2D transmission end user devices, D2D transmitting terminals are used
Family equipment transmits D2D signals and receives end user device to D2D again.Second of D2D transmission mode is controlled by user equipment, without
Need to pass through network-side.That is, user equipment can randomly select the available resources in resource pool to carry out D2D communications.
When user equipment is moved to the coverage intersection of two base stations during D2D communications are carried out, at this time may
Need to switch to adjacent objects base station from current serving BS to maintain communication quality.According to 3GPP specifications, user equipment needs
When adjacent objects base station provide the information in relation to its special resource pond commTxPoolExceptional after, could at random from
The special resource pond commTxPoolExceptional of adjacent objects base station chooses available resources to maintain D2D service continuities.
However, needing a period of time receiving the SIB21 of adjacent objects base station and scanning special resource pond, D2D communications may take
The preceding of D2D resources must be can use just to interrupt, it is therefore desirable to a kind of point-to-point communication side that can maintain service continuity during switching
Method and associated communication system.
The content of the invention
In view of above-mentioned problem of the prior art, it is an object of the invention to provide a kind of method for carrying out point-to-point communication and
Associated communication system so that user equipment can maintain D2D service continuities during switching.
To reach above-mentioned purpose, the present invention discloses a kind of method for carrying out point-to-point communication in a communication system, described
Communication system includes at least one first user equipment, a second user equipment, a first base station and one second base station.The method
The first base station is resided in including first user equipment；The first base station is provided in relation to the first base station and described
The point-to-point information of second base station gives first user equipment, wherein the point-to-point information includes at least the first base station
Send resource pool, the first base station receives resource pool, the ad hoc resources pond of the first base station, second base station
Send resource pool, the reception resource pool of second base station, and the ad hoc resources pond of second base station；First user
Equipment scans the transmission resource pool of second base station, described according to the resource scan criteria that the first base station is provided
The reception resource pool of second base station or the ad hoc resources pond of second base station can use point-to-point resource to obtain one；Described first
User equipment selects the ad hoc resources pond of the first base station according to the resource selected criteria that the first base station is provided
Or the existing point-to-point resource in the transmission resource pool of the first base station come with the second user equipment carry out it is point-to-point
Communication, or described in selection point-to-point communication can be carried out with the second user equipment with point-to-point resource.
To reach above-mentioned purpose, the present invention discloses a kind of communication system for supporting point-to-point communication, it includes one first
Base station, one second base station, one first user equipment, and one second base station.The first base station is used for providing related described first
The point-to-point information of base station and second base station, a resource scan criteria, and a resource selected criteria, wherein the point pair
Point information includes at least the transmission resource pool, the reception resource pool of the first base station, the first base station of the first base station
Ad hoc resources pond, second base station send resource pool, the reception resource pool of second base station, and second base
The ad hoc resources pond stood.First user equipment resides in the first base station, and is swept according to the resource scan criteria
That retouches second base station sends resource pool, the ad hoc resources pond for receiving resource pool or second base station of second base station
With obtain one can use point-to-point resource, further according to the resource selected criteria come select the ad hoc resources pond of the first base station or
An existing point-to-point resource in the transmission resource pool of the first base station to carry out with the second user equipment point-to-point logical
Letter, or described in selection point-to-point communication can be carried out with the second user equipment with point-to-point resource.
Brief description of the drawings
Fig. 1 is the functional block diagram for the communication system that the present invention supports P-2-P technology.
Fig. 2 is the method flow diagram that the present invention carries out point-to-point communication in a communications system.
Wherein, the reference numerals are as follows：
100 communication systems
BS1, BS2 base station
UE1, UE2 user equipment
S1, S2 coverage
210~300 steps
Embodiment
Fig. 1 is the functional block diagram for the communication system 100 that the present invention supports P-2-P technology.Communication system 100 includes more
A base station (network-side) and multiple user equipmenies (client).For illustrative purposes, Fig. 1 illustrate only two 1~BS2 of base station BS
With two 1~UE2 of user equipment (UE) of sign.In embodiments of the present invention, 1~BS2 of base station BS can be evolutionary base station
(evolved-NobeB, eNB), base transceiver system (base transceiver system, BTS), access point (access
), or femto cell (femtocell) point.1~UE2 of user equipment (UE) can be mobile phone, personal digital assistant
(personal digital assistant, PDA), hand held (handheld) computer, tablet (tablet) computer, fan
Your desktop (nettop) computer, notes type (laptop) computer, or other devices for possessing D2D communication functions.However, base
Stand and the type and quantity of user equipment do not limit scope of the invention.
User equipment (UE) 1 is located at the coverage S1 of base station BS 1, therefore can pass through in base station BS 1 and coverage S1
Other user equipmenies communicate.User equipment (UE) 2 is located at the coverage S2 of base station BS 2, therefore can pass through base station BS 2 and cover
Other user equipmenies in lid scope S2 communicate.In addition, the user equipment positioned at different base station coverage also can pass through
D2D technologies carry out data transmission.For example, the user equipment (UE) 1 being positioned in scope S1 can be positioned over scope S2
Interior user equipment (UE) 2 carries out D2D communications.
Fig. 2 is the method flow diagram that the present invention carries out D2D communications in the communication system 100, it comprises the following steps.
Step 210：First user equipment resides in first base station；Perform step 220.
Step 220：Network-side, which provides, at least closes the D2D information of first base station and the second base station to the first user equipment；
Perform step 230.
Step 230：Network-side provides a resource scan criteria and a resource selected criteria to the first user equipment；Perform step
Rapid 240.
Step 240：First user equipment according to resource scan criteria come scan the resource pool of the second base station can to obtain one
With D2D resources；Perform step 250.
Step 250：First user equipment judges whether there is either condition establishment in resource selected criteria；If so, perform step
Rapid 270；If it is not, perform step 260.
Step 260：First user equipment is according to ad hoc resources pond (the exceptional resource of first base station
Pool) or resource pool (Tx resource pool) is sent to carry out D2D communications with second user equipment；Perform step 280.
Step 270：First user equipment according to the ad hoc resources pond of the second base station or send resource pool come and second user
Equipment carries out D2D communications；Perform step 280.
Step 280：First user equipment judges whether that needs switch over；If so, perform step 290；If it is not, perform step
Rapid 300.
Step 290：First user equipment switches to the second base station from first base station, and according to the ad hoc resources of the second base station
Pond sends resource pool to carry out D2D communications；Perform step 300.
Step 300：Perform other runnings.
The base station selection criterion (cell selection criteria) or base station reselection defined according to related 3GPP specifications
Standard (cell reselection criteria), the top-quality base station of user equipment meeting selection signal are used as current clothes
Business base station.For the communication system 100 shown in Fig. 1, user equipment (UE) 1 can reside in base station BS 1 in step 210, and use
Family equipment UE 2 can reside in base station BS 2 in step 210.For the purpose of simplifying the description, next come with the running of user equipment (UE) 1
Explanation.
In a step 220, network-side can be provided in relation to current serving BS and at least D2D information of an adjacent objects base station
To user equipment.For the communication system 100 shown in Fig. 1, network-side can pass through base station BS 1 and provide related 1~BS2 of base station BS
D2D information provide the D2D in relation to 1~BS2 of base station BS to all user equipmenies in coverage S1, and through base station BS 2
Information is to all user equipmenies in coverage S2.For illustrative purposes, it is assumed that user equipment (UE) 1, which is D2D, sends end device,
And user equipment (UE) 2 is D2D receiving end devices.User equipment (UE) 1 can receive the transmission of first base station BS1 in a step 220
Resource pool, the transmission resource pool of the second base station BS 2, the reception resource pool (Rx resource pool) of first base station BS1, second
Base station BS 2 receives resource pool, the special resource pond of first base station BS1, the special resource pond of the second base station BS 2, first base station
The region computational methods of BS1, and the region computational methods of the second base station BS 2.
In step 230, network-side can provide resource scan criteria and resource selected criteria to user equipment.With Fig. 1 institutes
For the communication system 100 shown, network-side can pass through first base station BS1 and provide resource pool scan mode in coverage S1
All user equipmenies, and resource pool scan mode is provided to all user equipmenies in coverage S2 through the second base station BS 2.
In an embodiment of the present invention, base station can pass through broadcast SIB21 to send D2D information, resource scan criteria and money
Source selected criteria is to all user equipmenies in coverage.In an alternative embodiment of the invention, base station can pass through a special letter
Cease to send D2D information, resource scan criteria and resource selected criteria to all user equipmenies in coverage, such as through
Wireless heterogeneous networks configuration (RRC reconfiguration) information again.However, base station sends D2D information, resource scanning standard
Then the mode with resource selected criteria does not limit scope of the invention.
In the present invention, the resource scan criteria that user equipment receives in step 230 may include following condition at least
One of them：
Condition (1)：The signal strength of serving BS is less than one first predetermined critical at present；
Condition (2)：The quality of serving BS is less than one first preassigned at present；
Condition (3)：The signal strength of serving BS is less than the signal strength of adjacent objects base station at present；
Condition (4)：The quality of serving BS is less than the quality of neighbor base station at present；And
Condition (5)：Aerial (over the air, the OTA) information of downloading being subject to from network termination includes switching command.
In the present invention, the resource selected criteria that user equipment receives in step 230 may include in following condition extremely
It is one of few：
Condition (6)：The signal strength of serving BS is higher than one second predetermined critical at present；
Condition (7)：The quality of serving BS is higher than one second preassigned at present；
Condition (8)：The signal strength of serving BS is higher than the signal strength of adjacent objects base station at present；And
Condition (9)：The quality of serving BS is higher than the quality of neighbor base station at present.
In step 240, the first user equipment can scan the resource pool of the second base station according to resource scan criteria.It is brighter
Really say, the first user equipment can scan the resource pool of the second base station in resource scan criteria during either condition establishment.In order to
Illustration purpose, it is assumed that user equipment (UE) 1 is that D2D sends end device, and user equipment (UE) 2 is D2D receiving end devices.User is set
For standby UE1, first base station S1 is current serving BS, and the second base station S2 is adjacent objects base station.When resource scan criteria
In condition (1)~(4) any establishment when, representing adjacent objects base station, compared to current serving BS to provide quality preferable
D2D resources.When the condition (5) in resource scan criteria is set up, represent and indicate that adjacent objects base station is provided according to network-side
D2D resources have priority.Therefore, when resource scan criteria conditional (1)~(5) any establishment, the meeting of user equipment (UE) 1 exists
The resource pool of the second base station BS 2 is scanned in step 240 to obtain available D2D resources.
In step 250, user equipment (UE) 1 can judge whether there is either condition establishment in resource selected criteria.Work as resource
During condition (6)~(7) any establishment in selected criteria, represent the D2D resources that current serving BS is provided and meet specific matter
Amount requires.When being set up when the condition (8) in resource scan criteria~(9) any establishment, represent current serving BS compared to
Adjacent objects base station can provide quality preferable D2D resources.Therefore, when resource selected criteria conditional (6)~(9) any establishment
When, user equipment (UE) 1 can be in step 260 using the existing D2D in the ad hoc resources pond of first base station UE1 or transmission resource pool
Resource to carry out D2D communications with second user equipment UE 2.
When condition (6)~(9) in resource scan criteria are all invalid, adjacent objects base station is represented compared to current clothes
Business base station can provide quality preferable D2D resources.Therefore, user equipment (UE) 1 can use the second base station in step 270 at this time
What BS2 was provided can carry out D2D communications with D2D resources with second user equipment UE 2.
In step 280, the first user equipment can according to the base station reselection standard defined in 3GPP specifications to determine whether
Need to switch over., can be from first when user equipment (UE) 1 judges to need switching for the communication system 100 shown in Fig. 1
Base station BS 1 switches to the second base station BS 2, and is led to according to the ad hoc resources pond or transmission resource pool of the second base station BS 2 to carry out D2D
Letter.
In conclusion in the present invention, each user equipment can all receive adjacent in relation to current serving BS and at least one
The point-to-point information of close-target base station, judges adjacent objects base station and current serving BS whichever energy according to resource scan criteria
The preferable D2D resources of quality are provided, and whether assess according to resource selected criteria D2D resources that current serving BS provided
Meet extra fine quality requirement, then determine according to this D2D resources that are provided using adjacent objects base station or current service base come into
Row D2D communicates.Therefore, the present invention can be avoided when prior art operates under second of D2D transmission mode, randomly selecting money
The successional problem of D2D communication services is unable to maintain that in the pond of source during available resources.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the invention, for the skill of this area
For art personnel, the invention may be variously modified and varied.Within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should all be included in the protection scope of the present invention.
Claims (14)
1. a kind of method for carrying out point-to-point communication in a communications system, the communication system are set including at least one first user
A standby, second user equipment, a first base station and one second base station, it is characterised in that including：
First user equipment resides in the first base station；
The first base station provides the point-to-point information in relation to the first base station and second base station to first user
Equipment, wherein the point-to-point information includes at least the transmission resource pool of the first base station, the reception money of the first base station
Source pond, the ad hoc resources pond of the first base station, the transmission resource pool of second base station, the reception resource of second base station
Pond, and the ad hoc resources pond of second base station；
First user equipment scans second base station according to the resource scan criteria that the first base station is provided
Transmission resource pool, the reception resource pool of second base station or the ad hoc resources pond of second base station to obtain an available point
To a resource；And
First user equipment selects the first base station according to the resource selected criteria that the first base station is provided
Ad hoc resources pond or the first base station transmission resource pool in an existing point-to-point resource set with the second user
It is standby to carry out point-to-point communication, or can be carried out described in selection with point-to-point resource with the second user equipment point-to-point logical
Letter.
2. the method as described in claim 1, it is characterised in that the resource scan criteria is included in following condition at least within
One of：
The signal strength of the first base station is less than one first predetermined critical；
The quality of the first base station is less than one first preassigned；
The signal strength of the first base station is less than the signal strength of second base station；
The quality of the first base station is less than the quality of second base station；And
The aerial download information that first user equipment is received from the first base station includes a switching command.
3. the method as described in claim 1, it is characterised in that first user equipment is in the resource scan criteria
Either condition scans transmission resource pool, the reception resource pool or described second of second base station of second base station when setting up
The ad hoc resources pond of base station described can use point-to-point resource to obtain.
4. the method as described in claim 1, it is characterised in that the resource selected criteria is included in following condition at least within
One of：
The signal strength of the first base station is higher than one second predetermined critical；
The quality of the first base station is higher than one second preassigned；
The signal strength of the first base station is higher than the signal strength of second base station；And the quality of the first base station is high
Quality in second base station.
5. method as claimed in claim 4, it is characterised in that:
When either condition is set up in the resource selected criteria, first user equipment is special using the first base station
An existing point-to-point resource in resource pool or the transmission resource pool of the first base station to carry out with the second user equipment
Point-to-point communication；And
When being set up in the resource selected criteria without any condition, point-to-point money can be used described in the first user equipment use
Source to carry out point-to-point communication with the second user equipment.
6. the method as described in claim 1, it is characterised in that further include：
In first user equipment after the first base station switches to second base station, first user equipment makes
Point-to-point communication can be carried out with described with point-to-point resource.
7. the method as described in claim 1, it is characterised in that further include：
The first base station sends the point-to-point information through a system information block or a specialized information, the resource is swept
Criterion or the resource selected criteria are retouched to first user equipment.
A kind of 8. communication system for supporting point-to-point communication, it is characterised in that including：
One first base station and one second base station, the first base station are used for providing in relation to the first base station and second base station
Point-to-point information, a resource scan criteria, an and resource selected criteria, wherein the point-to-point information include at least it is described
First base station send resource pool, the first base station receives resource pool, the ad hoc resources pond of the first base station, described the
Two base stations send resource pool, the reception resource pool of second base station, and the ad hoc resources pond of second base station；And
One first user equipment and one second base station, first user equipment reside in the first base station, and according to described
Resource scan criteria come scan second base station send resource pool, second base station reception resource pool or described second
The ad hoc resources pond of base station can use point-to-point resource to obtain one, and first base is selected further according to the resource selected criteria
An existing point-to-point resource in the ad hoc resources pond stood or the transmission resource pool of the first base station is come and the second user
Equipment carries out point-to-point communication, or can be carried out described in selection with point-to-point resource with the second user equipment point-to-point logical
Letter.
9. communication system as claimed in claim 8, it is characterised in that the resource scanning that the first base station is provided is accurate
Then include at least one in following condition：
The signal strength of the first base station is less than one first predetermined critical；
The quality of the first base station is less than one first preassigned；
The signal strength of the first base station is less than the signal strength of second base station；
The quality of the first base station is less than the quality of second base station；And
The aerial download information that first user equipment is received from the first base station includes a switching command.
10. communication system as claimed in claim 9, it is characterised in that first user equipment is scanned in the resource
Second base station is scanned when either condition is set up in criterion sends resource pool, the reception resource pool of second base station or institute
State the ad hoc resources pond of the second base station described can use point-to-point resource to obtain.
11. communication system as claimed in claim 8, it is characterised in that the resource that the first base station is provided is selected
Criterion includes at least one in following condition：
The signal strength of the first base station is higher than one second predetermined critical；
The quality of the first base station is higher than one second preassigned；
The signal strength of the first base station is higher than the signal strength of second base station；And the quality of the first base station is high
Quality in second base station.
12. communication system as claimed in claim 11, it is characterised in that:
When either condition is set up in the resource selected criteria, first user equipment is special using the first base station
An existing point-to-point resource in resource pool or the transmission resource pool of the first base station to carry out with the second user equipment
Point-to-point communication；And
When being set up in the resource selected criteria without any condition, point-to-point money can be used described in the first user equipment use
Source to carry out point-to-point communication with the second user equipment.
13. communication system as claimed in claim 8, it is characterised in that first user equipment is separately used for from described the
One base station is switched to after second base station, and point-to-point communication can be carried out with point-to-point resource using described.
14. communication system as claimed in claim 8, it is characterised in that the first base station through a system information block or
One specialized information sends the point-to-point information to first user equipment.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US201662405243P | 2016-10-07 | 2016-10-07 | |
| US62/405,243 | 2016-10-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107920339A true CN107920339A (en) | 2018-04-17 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710171238.4A Withdrawn CN107920339A (en) | 2016-10-07 | 2017-03-21 | Carry out the method and associated communication system of point-to-point communication |
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| Country | Link |
|---|---|
| CN (1) | CN107920339A (en) |
| TW (1) | TWI633803B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115699959A (en) * | 2020-04-14 | 2023-02-03 | 日本电气株式会社 | Method, terminal device and computer readable medium for communication |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104918330A (en) * | 2014-03-14 | 2015-09-16 | 电信科学技术研究院 | D2D sending resource pool selection method and D2D sending UE |
| CN105009676A (en) * | 2013-02-28 | 2015-10-28 | 英特尔德国有限责任公司 | Radio communication devices and cellular wide area radio base station for direct communication |
| CN105122886A (en) * | 2013-03-08 | 2015-12-02 | 诺基亚技术有限公司 | Method and apparatus for handover of device-to-device communications |
| EP2961235A1 (en) * | 2014-06-27 | 2015-12-30 | Samsung Electronics Co., Ltd | Methods and apparatus for inter-cell device-to-device communication and discovery |
| EP3001710A1 (en) * | 2014-09-25 | 2016-03-30 | LG Electronics Inc. | Method and apparatus for receiving signal of neighboring cell signal by d2d terminal in wireless communication system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3120641B1 (en) * | 2014-03-19 | 2021-01-20 | Interdigital Patent Holdings, Inc. | Device-to-device synchronization |
-
2017
- 2017-03-14 TW TW106108255A patent/TWI633803B/en active
- 2017-03-21 CN CN201710171238.4A patent/CN107920339A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105009676A (en) * | 2013-02-28 | 2015-10-28 | 英特尔德国有限责任公司 | Radio communication devices and cellular wide area radio base station for direct communication |
| CN105122886A (en) * | 2013-03-08 | 2015-12-02 | 诺基亚技术有限公司 | Method and apparatus for handover of device-to-device communications |
| CN104918330A (en) * | 2014-03-14 | 2015-09-16 | 电信科学技术研究院 | D2D sending resource pool selection method and D2D sending UE |
| EP2961235A1 (en) * | 2014-06-27 | 2015-12-30 | Samsung Electronics Co., Ltd | Methods and apparatus for inter-cell device-to-device communication and discovery |
| EP3001710A1 (en) * | 2014-09-25 | 2016-03-30 | LG Electronics Inc. | Method and apparatus for receiving signal of neighboring cell signal by d2d terminal in wireless communication system |
Also Published As
| Publication number | Publication date |
|---|---|
| TW201815220A (en) | 2018-04-16 |
| TWI633803B (en) | 2018-08-21 |
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Application publication date: 20180417 |