CN105025553B - User equipment based on user equipment grouping in D2D communications finds method - Google Patents
User equipment based on user equipment grouping in D2D communications finds method Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/16—Discovering, processing access restriction or access information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
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Abstract
A kind of user equipment based on user equipment grouping in being communicated the invention discloses D2D finds method, user equipment is grouped by base station according to user device geographical location, and resource block is grouped by frequency, make user's device packets be grouped with resource block simultaneously to match, and then base station is that user equipment distributes the suitable resource block being grouped with it in matched resource grouping according to resource allocation criterion, and efficiency is found to improve user equipment.The present invention, which can effectively improve, to be in user equipment in network coverage, and number of user equipment finds efficiency much larger than the user equipment under the scene of available resource block number.
Description
Technical field
The present invention be one kind in D2D communication systems, high efficiency user when user equipment is within the scope of network-control
Method for discovering equipment, D2D user equipmenies are the discovery that a part for the D2D communication technologys, belong to mobile communication technology field.
Background technology
Device-to-Device (D2D) communications are a kind of under the control of system, are allowed small by being multiplexed between terminal
The new technique that area resource is directly communicated, it can increase frequency spectrum efficiency of cellular communication system, solve to a certain extent
The problem of wireless communication system frequency spectrum resource scarcity.In addition, the benefit that it can also bring includes：The burden of mitigation cellular network,
The robustness etc. for reducing the battery power consumption of mobile terminal, increasing bit rate, improving network infrastructure failure, moreover it is possible to support new
The small range Point-to-Point Data service of type.Based on advantage as above, D2D communications become the research hotspot of current mobile communication field.
Document：Qizhi Zhang,Deping Liu,“On the hopping pattern design for D2D
Discovery ", Vehicular Technology Conference (VTC Fall), 2014 IEEE 80th, 14-17
Sept.2014 discloses a kind of resource hop scheme scheme, can be that each user equipment redistributes resource.
D2D user equipmenies find the basis communicated as D2D, and efficiency directly affects the quality of D2D communications, so also standby
It attracts attention.D2D communication scenes are numerous, and the scene that wherein user equipment is within the scope of network-control is the most common scene,
User equipment discovery procedure at this time can be controlled by base station, and base station can be user equipment reasonable distribution resource, reached reduction and used
The purpose of family equipment room interference.When number of user equipment is excessive, especially number of user equipment is much larger than available resource block number
Scene under, the interference between user equipment becomes extremely serious, it is necessary to design effective Resource Allocation Formula, reduce interference, carry
High resource utilization and user equipment find efficiency.
Invention content
Goal of the invention：In order to overcome the deficiencies in the prior art, user is based in a kind of D2D communications of present invention offer
The user equipment of device packets finds that method, user equipment grouping match with resource grouping, and base station is selected in each discovery period
It takes suitable user equipment to find resource for its distribution is suitable, is within the scope of network-control in user equipment to realize,
And number of user equipment is found much larger than the high efficiency user equipment under number of resource blocks purpose scene.
Technical solution：To achieve the above object, the technical solution adopted by the present invention is：
User equipment based on user equipment grouping in a kind of D2D communication finds method, and base station is according to user equipment geography
User equipment is grouped by position, and resource block is grouped by frequency, while user's device packets being made to be grouped with resource block
Match, and then according to resource allocation criterion to be that user equipment distribution is grouped with it suitable in grouping of matched resource for base station
Resource block finds efficiency to improve user equipment.
Include the following steps：
Step 1, base station is numbered for each user equipment, is grouped user equipment according to geographical location；
Step 2, resource resource block in available resources pond is numbered for base station, the use of each resource block number its frequency domain,
Time-domain position indicates；Resource block is grouped by base station according to the grouping situation of user equipment in step 1 by frequency, make resource grouping with
User equipment grouping matches；
Step 3, it is grouped according to the resource allocation of the grouping situation of the user equipment of step 1 and step 2 and determines resource allocation
Criterion；In base station selected suitable user equipment of each discovery period and according to resource allocation criterion corresponding resource is distributed for it
Block；
Step 4, after each user equipment, which is transmitted across, finds signal, base station is each user according to resource hop scheme scheme
Equipment redistributes resource；
Step 5, user equipment according to the other number of user equipment detected or finds that number of cycles determines end condition；
After each user equipment is transmitted across again finds signal, if not up to end condition, base station renumber user equipment,
It returns to step 3 and carries out next period；If reaching end condition, terminate entire user equipment discovery procedure.
User equipment is grouped by base station according to geographical location in the step 1, and is the method for each user equipment number：
Each user equipment in each cell is numbered first for base station, and number includes the cell id and cell of each user equipment
Interior number, then base station user equipment is grouped according to geographical location, and be each customer equipment identification its packet number.
Allocation criteria in the step 3 is：With cell the different moneys in the grouping of same resource are used with group user equipment
Source block, different community can use the resource block that same asset is grouped with group user equipment, and can use same resource block,
The difference group user equipment resource block that then selection different resource is grouped always；If certain group number of user equipment is more than the group in cell
Available resource block number, then selection and a part of user equipment of resource block number same number carry out resource allocation.
Specific resource allocation methods are in the step 3：Base station is grouped into according to user equipment grouping with resource block small
User equipment distributes resource block in area, when the user equipment for being 1 for intra-cell users device number distributes resource block, basis first
Its user grouping number selects corresponding resource grouping, if its user grouping group number is 1, the resource for being 1 in resource grouping group number
Resource block (1,1) is selected to distribute to user in pond, if station number is 2, user grouping number is 1, then is selected in resource grouping 1
It selects resource block (1,2) and distributes to user, and so on.
The method for using resource hop scheme scheme to redistribute resource for each user equipment in the step 4：Each small
After all user equipmenies are all transmitted across discovery signal in area, base station is according to resource block hop scheme scheme, in the last one use before
The user equipment that signal is transmitted across in the equipment sending cycle of family finds resource from new distribution.
End condition in the step 5 is：
End condition one, setting longest find number of cycles threshold value, are tied when finding that the period is more than the threshold value of setting
Beam discovery procedure；
End condition two, the other number of user equipment detected according to user equipment, if the user device quantity detected
Mesh tends towards stability, then terminates discovery procedure；If the number of user equipment detected still increases always, user equipment will not be stopped
Discovery procedure.
The method that base station renumbers user equipment in the step 5：Only change intra-cell users device number, group number and
Cell id is constant；If there is n user equipment in cell, the integer random alignment for arriving n by 1, the user equipment that originally number is 1
New number be the random alignment first number, the new number for the user equipment that number is 2 is second of the random alignment
Number, and so on.
Advantageous effect：The user equipment based on user equipment grouping finds method in a kind of D2D communications provided by the invention,
Compared with the prior art, it has the advantages that：
1, this method proposition is grouped user equipment by geographical location, to distribute different moneys with group user in cell
Source, it is possible to prevente effectively from the disturbed condition that short distance user equipment generates.
2, this method proposition is grouped user equipment by geographical location, and different community can be multiplexed with group user equipment
Same resource block can effectively improve to improve resource utilization in the case where user equipment is much larger than number of resource blocks purpose scene
User equipment finds efficiency.
3, this method proposition is grouped user equipment by geographical location, and difference group user equipment selects different groups always
Resource block, it is possible to prevente effectively from interference and the influence of near-far interference.
Description of the drawings
Fig. 1 is grouped for user equipment
Fig. 2 is grouped for resource block
Fig. 3 is number of user equipment when being 650, and different schemes user equipment finds that performance compares
Fig. 4 is number of user equipment when being 450, and different schemes user equipment finds that performance compares
Specific implementation mode
In order to enable those skilled in the art to better understand the solution of the present invention, below in conjunction with embodiment in the present invention
Technical solution carry out clear, complete description, it is clear that the described embodiments are merely a part of the embodiments of the present invention, and
The embodiment being not all of.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creative work
Under the premise of the every other embodiment that is obtained, should all belong to the scope of protection of the invention.
User equipment based on user equipment grouping in a kind of D2D communication finds method, and the present invention is at user equipment
In within the scope of network-control, and number of user equipment is based on user equipment and resource much larger than under the scene of available resource block
The high efficiency D2D user equipmenies of block grouping find method.User equipment is grouped by base station according to user device geographical location,
And resource block is grouped by frequency, while so that user's device packets is grouped with resource block and matching, and then base station is according to resource
Allocation criteria is that user equipment distributes the suitable resource block being grouped with it in matched resource grouping, to improve user equipment
It was found that efficiency, is interfered between user equipment to reduce, improve the level of resources utilization, improve user equipment and find efficiency.
Include the following steps：
Step 1, base station is numbered for each user equipment, is grouped user equipment according to geographical location.
User equipment is grouped by base station according to geographical location in the step 1, and is the method for each user equipment number：
Each user equipment in each cell is numbered first for base station, and number includes the cell id and cell of each user equipment
Interior number, and can be by number unique mark in cell id and cell.Then user equipment is grouped by base station according to geographical location,
And it is its packet number of each customer equipment identification.
Step 2, resource resource block in available resources pond is numbered for base station, the use of each resource block number its frequency domain,
Time-domain position indicates；Resource block is grouped by base station according to the grouping situation of user equipment in step 1 by frequency, make resource grouping with
User equipment grouping matches.
Available resource block is numbered first for base station, and each resource block can be indicated with its frequency domain, time-domain position, such as
The tertial resource block of the second row can be expressed as (2,3) in resource pool, i.e., the position of the resource block is second money on frequency domain
Source block, third time slot in time domain.Then available resources pond is grouped by base station by frequency, and for each Resource Block identification its
Group number.It is the width of 44 resource blocks herein by taking resource pool size is 44 × 16 as an example, i.e., on frequency domain, respectively marked as 1-44,
The width of upper 16 time slots of time domain, respectively marked as 1-16.If resource block is divided into 4 groups, as shown in Fig. 2, first group of resource
Frequency domain be 1,5,9......37, No. 41 frequency domain width, time domain width is always then 16, second group, third group, the 4th
Group resource block distribution and so on.
Step 3, it is grouped according to the resource allocation of the grouping situation of the user equipment of step 1 and step 2 and determines resource allocation
Criterion；In base station selected suitable user equipment of each discovery period and according to resource allocation criterion corresponding resource is distributed for it
Block；
Allocation criteria in the step 3 is：With cell the different moneys in the grouping of same resource are used with group user equipment
Source block, different community can use the resource block that same asset is grouped with group user equipment, and can use same resource block,
The difference group user equipment resource block that then selection different resource is grouped always；If certain group number of user equipment is more than the group in cell
Available resource block number, then selection and a part of user equipment of resource block number same number carry out resource allocation.This money
The source method of salary distribution can effectively reduce interference and the influence of near-far interference, improve the level of resources utilization, set to improve user
Preparation shows efficiency.
Such as the available resources in the user equipment selection resource block grouping 1 in user equipment grouping 1.Base station is according to user
Device numbering distributes the resource block in resource grouping for it in order, and such as No. 1 user distributes first resource block, No. 2 users point
With second resource block, and so on.If number of user equipment is more than the resource in its corresponding resource grouping in per cell group
Block number mesh then selects a part of user equipment identical with resource block number to distribute resource.
Specifically resource allocation methods are：Base station is grouped into intra-cell users equipment according to user equipment grouping with resource block
Resource block is distributed, when the user equipment for being 1 for intra-cell users device number distributes resource block, first according to its user grouping number
It selects corresponding resource to be grouped, if its user grouping group number is 1, resource is selected in the resource pool that resource grouping group number is 1
Block (1,1) distributes to user, if station number be 2, user grouping number be 1, then resource grouping 1 in selection resource block (1,
2) user is distributed to, and so on.If cell in certain group number of user equipment be more than this group of available resource block number, selection with
A part of user equipment of resource block number same number carries out resource allocation, i.e., does not allow in same cell with group user equipment choosing
Select same resource block.For example, when each intra-cell users number of devices is 650, all user equipment group numbers in cell 1 at this time
All it is 1, but each resource pool group resource block number is 176 (totally 704, be divided into 4 groups) at this time, therefore in each discovery period cell
Resource block only is distributed for 176 user equipmenies in 1, to ensure fairness, is not sent out before being selected in the discovery period behind
The user equipment distribution resource block of signal is passed through, sends the use of signal according to user equipment number selection each discovery period herein
Family equipment, first finds that the period selects 1 to No. 176 user equipmenies, and second finds that the period selects 177 to No. 352 users to set
It is standby, and so on.
Step 4, after each user equipment, which is transmitted across, finds signal, base station is each user according to resource hop scheme scheme
Equipment redistributes resource；
The method for using resource hop scheme scheme to redistribute resource for each user equipment in the step 4：Each small
After all user equipmenies are all transmitted across discovery signal in area, base station is according to resource block hop scheme scheme, in the last one use before
The user equipment that signal is transmitted across in the equipment sending cycle of family finds resource from new distribution.The purpose renumberd is to avoid difference
The user equipment of different groups selects same resource block transmission signals always in cell, and to arrive n by 1, (n is every to the method renumberd
A intra-cell users number of devices) integer random alignment, the new number of the user equipment that originally number is 1 is the of the arrangement
One number, the new number for the user equipment that number is 2 are second number of the arrangement, and so on..
Step 5, user equipment according to the other number of user equipment detected or finds that number of cycles determines end condition；
After each user equipment is transmitted across again finds signal, if not up to end condition, base station renumber user equipment,
It returns to step 3 and carries out next period；If reaching end condition, terminate entire user equipment discovery procedure.
End condition in the step 5 is：
End condition one, setting longest find number of cycles threshold value, are tied when finding that the period is more than the threshold value of setting
Beam discovery procedure；
End condition two, the other number of user equipment detected according to user equipment, if the user device quantity detected
Mesh tends towards stability, then terminates discovery procedure；If the number of user equipment detected still increases always, user equipment will not be stopped
Discovery procedure.
The method that base station renumbers user equipment in the step 5：Only change intra-cell users device number, group number and
Cell id is constant；If there is n user equipment in cell, the integer random alignment for arriving n by 1, the user equipment that originally number is 1
New number be the random alignment first number, the new number for the user equipment that number is 2 is second of the random alignment
Number, and so on.It is that avoid in different community the user equipmenies of different groups from selecting always same by the purpose that user renumbers
Resource block transmission signals.
Example
This example is for the D2D user equipmenies in LTE system are found, packet mode is as shown in Figure 1, one in setting system
19 cells, each uniform dispenser 450 of cell or 650 user equipmenies are shared, setting available resources pond size is 44 × 16.With
Total user equipment number that center cell user equipment is averagely found is performance indicator.
Step 1：Each user equipment is numbered in base station, and for each equipment by its cell id (1-19), cell is interior to number (1-
650 or 1-450) unique mark, it is divided into 4 groups further according to location of user equipment for it, packet mode is as shown in Figure 1, and be each
User equipment adds its group number (1-4).
Step 2；Resource in available resources pond is numbered for base station, each resource block by its frequency location (1-44), when
Resource block is also divided into 4 groups, packet mode such as Fig. 2 by domain position (1-16) unique mark further according to user equipment grouping by frequency
It is shown, and add its group number (1-4) for each resource block.
As shown in Fig. 2, the resource pool size used in this method is 44 × 16, i.e., frequency domain is 44 resource block width, when
Domain is the width of 16 time slots.Resource block is had by the benefit that Fig. 2 packet modes are grouped, first, same group in same cell
User equipment use can reduce in same cell in the discovery procedure of short distance user equipment with group but different resource block due to half pair
The adverse effect that work communication pattern is brought.Second, during same resource is grouped, the frequency interval of the resource block in different frequency
Expand, frequency diversity gain can be increased, effectively overcome frequency selective fading.
Step 3：Base station according to user equipment grouping with resource block be grouped into intra-cell users equipment distribute resource block, when for
When the user equipment that intra-cell users device number is 1 distributes resource block, corresponding resource is selected according to its user grouping number first
Grouping, if its user grouping group number is 1, selection resource block (1,1) distributes to use in the resource pool that resource grouping group number is 1
Family, if station number is 2, user grouping number is 1, then selection resource block (1,2) distributes to user in resource grouping 1, with
This analogizes.Due to being more than resource block in its corresponding resource grouping per every group of number of user equipment (650 or 450) in cell at this time
Number (176), therefore this method selection and a part of user equipment of resource block number same number carry out resource allocation, i.e., not
Allow to select same resource block with group user equipment in cell.Therefore within each discovery period, each cell is only 176
User equipment distributes resource block, to ensure fairness, is not transmitted across the use of signal before being selected in the discovery period behind
Family equipment distributes resource block, and this method sends the user equipment of signal according to user equipment number selection each discovery period, the
One finds that the period selects 1 to No. 176 user equipmenies, and second finds that the period selects 177 to No. 352 user equipmenies, with such
It pushes away.
Step 4：All user equipmenies are transmitted across (the every cell user equipment number of this example after discovery signal in each cell
It is 650, then have passed through 4 discovery periods at this time), base station is according to resource block hop scheme scheme, to be sent in sending cycle before
The user equipment for crossing signal finds that resource, base station are that the sequence of user equipment distribution resource is remained according to upper step from new distribution,
1 to No. 176 user equipmenies are selected to distribute resources first, followed by 177 to No. 352 user equipmenies, and so on.
Step 5：After each user equipment is transmitted across again finds signal, if not up to end condition, base station will be used
Family equipment renumbers and (only changes intra-cell users device number, group number and cell id are constant), returns to step 3；If reaching termination
Condition then terminates entire user equipment discovery procedure.The method renumberd is originally to compile 1 to 650 integer random alignment
Number for 1 user equipment new number be the arrangement first number, new number for the user equipment that number is 2 is the arrangement
Second number, and so on.
End condition：
1, can longest be set by manufacturer and finds number of cycles, terminated when finding that the period is more than threshold value set by manufacturer
Discovery procedure.
2, the other number of user equipment detected according to user equipment, if the number of user equipment detected tends to be steady
It is fixed, then terminate discovery procedure；If the number of user equipment detected still increases always, user equipment will not be stopped and found
Journey.
Observation chart 3, Fig. 4 are that different schemes user equipment finds that performance compares, and wherein group indicates the use that this method is mentioned
Family equipment and resource block grouping, pefect indicate the number of user equipment averagely found in system optimally, this
When user equipment between do not interfere with the limitation of not half duplex mode of communication yet, the factor for influencing user equipment discovery only has path
Loss.Baseline expressions do not use any grouping scheme, resource hop scheme scheme, user equipment to randomly choose the feelings of resource block
Condition.No-group expressions do not use any grouping scheme, but still are that user equipment distributes resource block by base station, are equivalent to each small
Area is independent, and base station is that this cell user equipment does not take into account that other local resource block distribution conditions, institute when distributing resource block
It will not be assigned same resource block with the different user devices in same cell, but the user equipment in different community may divide
It is fitted on same resource block.As can be seen, when number of user equipment is 650, the user equipment of this method find performance compared with
Baseline improves 85.1%, and when number of user equipment is 450, the user equipment of this method finds that performance is carried compared with baseline
It is high by 32.1%.
It can be seen from the above, a kind of the user equipment grouping and resource grouping side based on location of user equipment of the present invention
Method is in for improving user equipment in D2D communications within the scope of network-control, and number of user equipment is much larger than resource block number
Scene under user equipment find efficiency, it is intended to found within the time short as possible using resource block few as possible more as possible
Number of user equipment.This method is grouped user equipment and available resource block by base station, make user's device packets with
Resource block grouping matches, and makes in same cell to reach drop using the different resource block in the grouping of same resource with group user equipment
The purpose interfered between low short distance user equipment can use same resource block with group user equipment in different community, reach and carry
The purpose of high resource utilization, difference group user equipment then selects the resource block in different resource grouping always, remote to reduce
The influence of nearly effect.By above method, it can effectively improve and be in network coverage in user equipment, and user equipment
Number finds efficiency much larger than the user equipment under the scene of available resource block number.
The above is only a preferred embodiment of the present invention, it should be pointed out that：For the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (5)
1. the user equipment based on user equipment grouping finds method in a kind of D2D communications, it is characterised in that：Base station is according to user
User equipment is grouped by device geographical location, and resource block is grouped by frequency, while making user's device packets and money
Source block grouping matches, and then base station is that user equipment distribution is grouped with it in matched resource grouping according to resource allocation criterion
Suitable resource block, to improve user equipment find efficiency；Include the following steps：
Step 1, base station is numbered for each user equipment, is grouped user equipment according to geographical location；
Step 2, resource resource block in available resources pond is numbered for base station, the use of each resource block number its frequency domain, time domain
Position indicates；Resource block is grouped by base station according to the grouping situation of user equipment in step 1 by frequency, makes resource grouping and user
Device packets match；
Step 3, it is grouped according to the resource allocation of the grouping situation of the user equipment of step 1 and step 2 and determines resource allocation criterion；
In base station selected suitable user equipment of each discovery period and according to resource allocation criterion corresponding resource block is distributed for it；
Allocation criteria is：With cell the different resource block in the grouping of same resource, same group of different community are used with group user equipment
User equipment uses the resource block that same asset is grouped, and uses same resource block, and difference group user equipment then selects always
The resource block of different resource grouping；If cell in certain group number of user equipment be more than this group of available resource block number, selection with
A part of user equipment of resource block number same number carries out resource allocation；
Resource allocation methods are：Base station is grouped into intra-cell users equipment with resource block according to user equipment grouping and distributes resource
Block is selected according to its user grouping number corresponding first when the user equipment for being 1 for intra-cell users device number distributes resource block
Resource grouping, if its user grouping group number be 1, resource grouping group number be 1 resource pool in select resource block（1,1）Point
Provisioned user, if station number is 2, user grouping number is 1, then selects resource block in resource grouping 1（1,2）Distribute to use
Family, and so on；
Step 4, after each user equipment, which is transmitted across, finds signal, base station is each user equipment according to resource hop scheme scheme
Redistribute resource；
Step 5, user equipment according to the other number of user equipment detected or finds that number of cycles determines end condition；When every
After a user equipment is transmitted across discovery signal again, if not up to end condition, base station renumber user equipment, return to
Step 3 carries out next period；If reaching end condition, terminate entire user equipment discovery procedure.
2. the user equipment based on user equipment grouping finds that method, feature exist in D2D communications according to claim 1
In：User equipment is grouped by base station according to geographical location in the step 1, and is the method for each user equipment number：Base station
Each user equipment in each cell is numbered first, number includes being compiled in the cell id and cell of each user equipment
Number, then user equipment is grouped by base station according to geographical location, and is its packet number of each customer equipment identification.
3. the user equipment based on user equipment grouping finds that method, feature exist in D2D communications according to claim 2
In：The method for using resource hop scheme scheme to redistribute resource for each user equipment in the step 4：The institute in each cell
After having user equipment to be all transmitted across discovery signal, base station is according to resource block hop scheme scheme, in the last one user equipment before
The user equipment that signal is transmitted across in sending cycle finds resource from new distribution.
4. the user equipment based on user equipment grouping finds that method, feature exist in D2D communications according to claim 3
In：End condition in the step 5 is：
End condition one, setting longest find number of cycles threshold value, terminate to send out when finding that the period is more than the threshold value of setting
Existing process；
End condition two, the other number of user equipment detected according to user equipment, if the number of user equipment detected becomes
In stabilization, then terminate discovery procedure；If the number of user equipment detected still increases always, user equipment discovery will not be stopped
Process.
5. the user equipment based on user equipment grouping finds that method, feature exist in D2D communications according to claim 4
In：The method that base station renumbers user equipment in the step 5：Only change intra-cell users device number, group number and cell
It is number constant；If there is n user equipment in cell, the integer random alignment for arriving n by 1 originally numbers the new of the user equipment for being 1
Number is first number of the random alignment, and the new number for the user equipment that number is 2 is second number of the random alignment, with
This analogizes.
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| CN107295562A (en) * | 2016-04-01 | 2017-10-24 | 中兴通讯股份有限公司 | Resource allocation method, apparatus and system, UE and base station |
| CN107734501A (en) * | 2016-08-11 | 2018-02-23 | 株式会社Ntt都科摩 | Sending method, method of reseptance, trunking, base station and mobile station |
| WO2019028841A1 (en) * | 2017-08-11 | 2019-02-14 | 华为技术有限公司 | Terminal communication method and user equipment |
| CN108391317B (en) * | 2018-04-03 | 2021-09-07 | 吉林大学 | Resource allocation method and system for D2D communication in cellular network |
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| CN104012013A (en) * | 2011-10-24 | 2014-08-27 | Lg电子株式会社 | Method for allowing base station to support device-to-device (D2D) communication in wireless communication system, and method for allowing D2D device to efficiently transmit D2D communication request signal |
| CN104113851A (en) * | 2013-04-16 | 2014-10-22 | 中兴通讯股份有限公司 | Device to device (D2D) discovery method, base station, and user device |
| CN104602353A (en) * | 2015-02-27 | 2015-05-06 | 东南大学 | Wireless resource allocation method for D2D links in cellular mobile communication system |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104012013A (en) * | 2011-10-24 | 2014-08-27 | Lg电子株式会社 | Method for allowing base station to support device-to-device (D2D) communication in wireless communication system, and method for allowing D2D device to efficiently transmit D2D communication request signal |
| CN104113851A (en) * | 2013-04-16 | 2014-10-22 | 中兴通讯股份有限公司 | Device to device (D2D) discovery method, base station, and user device |
| CN104602353A (en) * | 2015-02-27 | 2015-05-06 | 东南大学 | Wireless resource allocation method for D2D links in cellular mobile communication system |
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