CN106162737A - A kind of D2D equipment autonomously based on adaptive congestion control finds method - Google Patents

A kind of D2D equipment autonomously based on adaptive congestion control finds method Download PDF

Info

Publication number
CN106162737A
CN106162737A CN201610647639.8A CN201610647639A CN106162737A CN 106162737 A CN106162737 A CN 106162737A CN 201610647639 A CN201610647639 A CN 201610647639A CN 106162737 A CN106162737 A CN 106162737A
Authority
CN
China
Prior art keywords
user
enodeb
discovery
resource pool
equipment
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201610647639.8A
Other languages
Chinese (zh)
Other versions
CN106162737B (en
Inventor
章嘉懿
李旭
邓立凯
梁亚楠
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Beijing Jiaotong University
Original Assignee
Beijing Jiaotong University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Beijing Jiaotong University filed Critical Beijing Jiaotong University
Priority to CN201610647639.8A priority Critical patent/CN106162737B/en
Publication of CN106162737A publication Critical patent/CN106162737A/en
Application granted granted Critical
Publication of CN106162737B publication Critical patent/CN106162737B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/0289—Congestion control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access, e.g. scheduled or random access
    • H04W74/08—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]
    • H04W74/0833—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using a random access procedure
    • H04W74/0841—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using a random access procedure with collision treatment
    • H04W74/085—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using a random access procedure with collision treatment collision avoidance
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/24—Connectivity information management, e.g. connectivity discovery or connectivity update

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The present invention discloses a kind of D2D equipment autonomously based on adaptive congestion control and finds method, and the method comprises the following steps: eNodeB distribution cell-specific in community finds resource pool and sets the discovery cycle；D2D user carries out Stochastic accessing；The user being successfully accessed obtains special discovery resource pool and discovery cycle；Community eNodeB controls the competition number of users in current special discovery resource pool adaptively；Uncontrolled D2D user determines to carry out the random competition of Current resource according to the broadcast message of eNodeB；Compete failed user and this in check user before next special discovery resource pool arrives, may proceed to receive base station broadcast message, and repeat the above steps；The successful D2D user of random competition sends the discovery message of self, and receives the discovery message of D2D user around.The present invention can reduce the collision probability between user by using adaptive congestion control mechanism, it is to avoid network congestion, the carrying out of effective guarantee D2D communication.

Description

A kind of D2D equipment autonomously based on adaptive congestion control finds method
Technical field
The present invention relates to D2D communication technical field.Set more particularly, to a kind of D2D based on adaptive congestion control For independently finding method.
Background technology
D2D (Device-to-Device) communication technology, i.e. direct communication technology between device-to-device, be following 5G net A crucial candidate technologies in network.D2D communication can make data directly arrive mesh equipment without the forwarding of core network, Therefore can be effectively improved the power system capacity of message transmission rate and network, there is research and using value greatly.As The premise of D2D communication and basis, D2D equipment finds the key technology of always D2D technology, how to allow each D2D equipment to the greatest extent Many may automatically identify that potential communication user around is the difficult problem faced at present, therefore improve equipment and find that efficiency is to grind The emphasis direction studied carefully.
D2D equipment finds to refer to the process of an equipment identification surrounding neighbours device end.Under normal circumstances, D2D is completed Equipment is the discovery that the precondition that D2D communicates.D2D device discovery techniques has two kinds: a kind of is discovery based on core net, each D2D equipment all realizes the discovery to surrounding neighbours alternately by carrying out information with eNodeB；Another kind is that the autonomous of equipment room is sent out Existing, refer to transmission and the reception that can directly carry out finding signal between equipment, directly obtain the information of surrounding neighbours.Autonomous discovery Mode can break away from the equipment dependence to core network, independently completes discovery procedure, has higher discovery efficiency and relatively low Find time delay.
At present it is broadly divided into two big classes about the scheduling of resource found for D2D equipment: type one and type two, wherein class Type two includes again two kinds of different classification.Under the type one scene mainly for the network coverage or subnetwork covering, use week The mode of phase resource distribution, provides the user resource pool.Type two refers to that, under the scene of the network coverage, eNodeB concentrates tune Degree, sends resource control signaling to user, and wherein a kind of delivery time referred at each discovery signal in type two is carried out Dynamic dispatching, another in type two refers to use semi-static mode to carry out scheduling of resource, and base station is according to different user Distribute different periodicity and find resource.At present mostly research is adopted as user's cycle provides the mode of resource pool, but existing Generally there is the problem that discovery is inefficient and discovery time delay is bigger in scheme.
Congestion control mechanism is for solving in cellular network because of the network caused in a large number of users access network process the earliest Congestion problems and the control mechanism that proposes, this mechanism can stop some or all of subscriber equipment to set up RRC (Radio Resource Control, wireless heterogeneous networks) connect, large number quipments therefore can be avoided to carry out accessing the peak caused, with Time avoid signaling congestion and the overload of core net.In this mechanism, each subscriber equipment can be according to the access of the broadcast of base station Controlling elements perform access procedure, if generally this factor is fixing dry values.Network utilisation controls signaling and indicates individually use How family or user grouping scale the Access Control parameter of Web broadcast.The purpose of scaling is the Access Control factor according to broadcast (Barring Factor), divides application Access Control in various degree to each user or user.On this manufacturing basis, if base station The optimum Access Control factor can be dynamically calculated according to current potential access customer number amount, then adaptive congestion control can be reached The purpose of system.Owing to congestion control mechanism can be good at the competition quantity of control equipment, reduce the collision in resource contention general Rate, is therefore applied to this technology in D2D discovery mechanism can improve equipment success probability of detection to a certain extent.
Accordingly, it is desirable to provide a kind of D2D equipment autonomously based on adaptive congestion control finds method.
Summary of the invention
Present invention aims to drawbacks described above, it is provided that a kind of based on adaptive congestion control can improve equipment Find efficiency, reduce discovery time delay, ensure that the D2D equipment autonomously of D2D equipment room instant messaging finds method.
For reaching above-mentioned purpose, the present invention uses following technical proposals:
A kind of D2D equipment autonomously based on adaptive congestion control finds method, and the method comprises the following steps:
Step1: in one community of LTE-A network, community eNodeB are used for distributing cell-specific and find resource pool, and set Discovery cycle T between fixed adjacent special discovery resource poold, special discovery resource pool sends for D2D equipment and finds message；
Step2: one or more D2D users carry out Stochastic accessing in community；
Step3: be successfully accessed the D2D user of community, obtains special of community by the broadcast of community eNodeB Existing resource pool and discovery cycle Td；
Step4: community eNodeB competes number of users M according to current potential resourcei, controlled current adaptively by broadcast Competition number of users in special discovery resource pool, is divided in check D2D user and uncontrolled D2D simultaneously by D2D user User；
Step5: described in check D2D user current special discovery resource pool arrive before do not carry out Current resource with Machine is competed, and described uncontrolled D2D user determines according to the broadcast message of eNodeB before current special discovery resource pool arrives Surely the random competition of Current resource is carried out；
Step6: compete failed user and this in check user and can continue before next special discovery resource pool arrives Base station broadcast message is received in continued access, and repeats above-mentioned Step3-Step5；
The special discovery resource that the successful D2D user of Step7: random competition arrives for utilizing competition sends the discovery of self Message, other the unselected discovery resource locations being additionally operable in Current resource pond carry out blind check, reception D2D user's around Find message；
LTE-A network refers to long-term evolution upgrading network；ENodeB refers to evolved mobile base station；D2D refers to that device-to-device leads to Letter.
Preferably, being successfully accessed the D2D user of community, the broadcast also by eNodeB obtains D2D reporting of user week Phase.
Preferably, the method also comprises the steps:
Step8: be successfully received other D2D and the user discover that the D2D user of message arranges to its neighbours of eNodeB periodic report Table, neighbor list includes the neighbor information of maintenance and newfound neighbor information.
Preferably, the running time-frequency resource of Physical Uplink Shared Channel in special discovery resource occupation LTE-A network.
Preferably, the method also comprises the steps:
Step9:eNodeB is at one D2D list of devices of local maintenance: if there being new D2D user to access, then eNodeB will add Add new D2D user profile in D2D list of devices；If certain equipment in D2D list of devices does not has in the time threshold set Keep and the maintenance of information of eNodeB, then eNodeB will delete the information of this D2D user from D2D list of devices.
Preferably, cycle T is founddSend the signal time domain length finding message more than one, and find cycle TdFor 1ms Integral multiple.
Preferably, potential competition user MiIncluding new registration user Mn, last time compete unsuccessfully user MfControlled with last time Do not compete user Mc, and Mi=Mn+Mf+Mc。
Preferably, control the competition number of users in next special discovery resource pool adaptively and specifically include following steps:
Step4.1:eNodeB calculates the expected value of the optimal user number every time carrying out resource contention
The competition number of users M that Step4.2:eNodeB statistics is the most potentiali, and calculate optimum control factor according to formula PB:
Wherein PBFor optimum control factor, its span is (0～1),For optimal user number expected value, MiIt is latent At competition number of users；
Step4.3:eNodeB before current special discovery resource pool arrives by broadcasting the potential competition in notifying cell User optimum control factor PB；
Step4.4: after in community, potential user receives broadcast in this equipment one random number P of stochastic generationX；
Step4.5: if PX≤PB, then this user is uncontrolled D2D user；
Step4.6: if PX＞ PB, then this user is in check D2D user.
It is further preferred that the expected value of optimal user numberObtained by following calculating:
E ( S ) = m ( 1 - 1 R ) m - 1
Above formula optimal solution is the expected value of optimal user number:
Wherein, E (S) represents that carrying out resource random competition successful user number in each special discovery resource pool expects, m Representing the user's number participating in resource contention, R represents the number of the available resources pair of configuration in special discovery resource pool.
Preferably, find that message comprises the device id of D2D user, coded system and synchronization message.
Preferably, in check user is fixed keeping out of the way often according to eNodeB instruction, back off time be 4s～ 512s, this user not competitive resource in back off time.
Beneficial effects of the present invention is as follows:
Technical scheme of the present invention belongs to the autonomous discovery mechanism of D2D equipment, and whole discovery procedure is to core network Rely on the least and without knowing other extraneous informations such as the particular location of user, network generally complexity is dropped significantly Low.Meanwhile, by using adaptive congestion control mechanism can reduce the collision probability between user, it is to avoid network congestion, make Successful user number realizes the theoretially optimum value under random sources competition mechanism, the carrying out of effective guarantee D2D communication.This is external sets In the case of standby or link failure, it is ensured that the robustness of network.
Accompanying drawing explanation
Below in conjunction with the accompanying drawings the detailed description of the invention of the present invention is described in further detail.
Fig. 1 illustrates the schematic diagram of LTE-A network framework.
Fig. 2 is illustrated based on the flow chart of the D2D equipment autonomously discovery method of adaptive congestion control.
Fig. 3 is illustrated based on the detailed of D2D equipment room discovery procedure in the D2D equipment autonomously discovery method of adaptive congestion control Thin flow chart.
Fig. 4 illustrates that in LTE-A network, D2D equipment autonomously finds the resource distribution schematic diagram of method.
Detailed description of the invention
In order to be illustrated more clearly that the present invention, below in conjunction with preferred embodiments and drawings, the present invention is done further Bright.Parts similar in accompanying drawing are indicated with identical reference.It will be appreciated by those skilled in the art that institute is concrete below The content described is illustrative and be not restrictive, and should not limit the scope of the invention with this.
Below the D2D equipment autonomously based on adaptive congestion control that the present embodiment provides is found that method is applied to such as figure LTE-A network shown in 1 is further described, and as shown in Figure 1, Figure 2 shown in (in figure, eNB is eNodeB), the present embodiment provides D2D equipment autonomously based on adaptive congestion control find method, comprise the steps:
Step1: in one community of LTE-A network, community eNodeB are used for distributing cell-specific and find resource pool, and set Discovery cycle T between fixed adjacent special discovery resource poold, special discovery resource pool sends for D2D equipment and finds message.Find Cycle TdSend the signal time domain length finding message more than one, and find cycle TdIntegral multiple for 1ms.Special discovery provides Pond, source comprises time and two dimensions of frequency, and each special discovery resource pool crosses over 30ms on time dimension.Find message bag Device id, coded system and synchronization message containing D2D user.LTE-A network refers to long-term evolution upgrading network, and eNodeB refers to evolution Type mobile base station, D2D refers to device-to-device communication.PUSCH channel (physical uplink in special discovery resource occupation LTE-A network Share channel) running time-frequency resource.
Step2: one or more D2D users carry out Stochastic accessing in community, and D2D user carries out Stochastic accessing mistake in community Journey is similar with the access procedure of legacy cellular user, however it is necessary that and informs that in access information eNodeB oneself is D2D equipment.
Step3: be successfully accessed the D2D user of community, obtains special of community by the broadcast of community eNodeB Existing resource pool and discovery cycle Td, it being successfully accessed the D2D user of community, the broadcast also by eNodeB obtains D2D user Report cycle.ENodeB broadcast comprises special discovery resource the arrival cycle (i.e. finding the cycle), distribution for D2D Equipment sends the information such as the time-frequency location of the special discovery resource finding message and the report cycle of D2D user, D2D user's Report cycle is that the neighbor list of oneself is reported the cycle of eNodeB by D2D user, the report cycle of above-mentioned D2D user according to Concrete cell conditions sets, and is typically set at 100s-600s.The special discovery resource occupation of distribution is in LTE-A network The running time-frequency resource of PUSCH channel, reporting information is also by PUSCH transmission.
Step4: community eNodeB competes number of users M according to current potential resourcei, controlled current adaptively by broadcast Competition number of users in special discovery resource pool, is divided in check D2D user and uncontrolled D2D simultaneously by D2D user User.Potential competition user MiIncluding new registration user Mn, last time compete unsuccessfully user MfIn check with last time do not compete use Family Mc, and Mi=Mn+Mf+Mc.Wherein, current special discovery resource pool refers to currently available special discovery resource pool, and this process has Body comprises the following steps:
Step4.1:eNodeB calculates the expected value of the optimal user number every time carrying out resource contentionUnder it passes through State calculating to obtain:
E ( S ) = m ( 1 - 1 R ) m - 1
Understanding, above formula optimal solution is the expected value of optimal user number, therefore obtains above formula derivation:
E ′ ( S ) = d E ( S ) d m = ( 1 - 1 R ) ^ ( m - 1 ) + ( 1 - 1 R ) ^ ( m - 1 ) * m * l o g ( 1 - 1 R )
Make E'(S)=0, then
Understand, for the controlling elements of broadcast every time, PBDetermined by R.Wherein, E (S) represents that each special discovery provides Carrying out the expectation of resource random competition successful user number in pond, source, m represents the user's number participating in resource contention, and R represents special With finding the number of the available resources pair of configuration in resource pool；
The competition number of users M that Step4.2:eNodeB statistics is the most potentiali, and calculate optimum control factor according to formula PB:
Wherein PBFor optimum control factor, its span is (0～1),For optimal user number expected value, MiIt is latent At competition number of users；
Step4.3:eNodeB before current special discovery resource pool arrives by broadcasting the potential competition in notifying cell User optimum control factor PB；
Step4.4: after in community, potential user receives broadcast in this equipment one random number P of stochastic generationX；
Step4.5: if PX≤PB, then this user is uncontrolled D2D user；
Step4.6: if PX＞ PB, then this user is in check D2D user.
Step5: described in check D2D user current special discovery resource pool arrive before do not carry out Current resource with Machine is competed, and described uncontrolled D2D user determines according to the broadcast message of eNodeB before current special discovery resource pool arrives Surely the random competition of Current resource is carried out.The most a certain uncontrolled D2D user is when each special discovery resource arrives, with it He uncontrolled D2D user uses random manner to compete some time-frequency location in special discovery resource pool.Controlled User as required, be fixed keeping out of the way often according to eNodeB instruction, back off time is 4s～512s, in back off time This user not competitive resource.During competition, the moment that each D2D user arrives at the resource pool for D2D special discovery message Attempt to surrounding neighbours oneself existence of broadcast, i.e. use the mode of random competition select RB to carrying out finding the transmission of message, Here we define: if certain RB is to (be specifically designed to transmission and find the running time-frequency resource of message) in special discovery resource pool DZ The most only chosen by a D2D user, then it is assumed that this D2D user competes successfully.Compete successful D2D user through setting Fixed cycle TsAgain compete special discovery resource, to safeguard and the neighborhood of D2D user in its neighbor list, above-mentioned fixing Cycle TsIt is set as the integral multiple in discovery cycle, is typically set at 150s-300s.Whereas if two or more D2D user selects Same RB pair, then it is assumed that these D2D users collide, and this is competed unsuccessfully.
Step6: compete failed user and this in check user and can continue before next special discovery resource pool arrives Base station broadcast message is received in continued access, and repeats above-mentioned Step3-Step5, and wherein, next special discovery resource pool refers to what next can use Special discovery resource pool.
The special discovery resource that the successful D2D user of Step7: random competition arrives for utilizing competition sends the discovery of self Message, other the unselected discovery resource locations being additionally operable in Current resource pond carry out blind check, reception D2D user's around Find message.
Step8: be successfully received other D2D and the user discover that the D2D user of message arranges to its neighbours of eNodeB periodic report Table, neighbor list includes the neighbor information of maintenance and newfound neighbor information.D2D user also safeguards neighbours' row in this locality Table, often through the individual special discovery resource area of n (n >=1), it may be found that neighbor information record neighbor list, and by PUSCH to ENodeB periodic report this locality neighbor list.The newfound neighbours of this D2D user and periodic maintenance is comprised in local neighbor list Neighbor information, if can not again receive the discovery of these neighbours in maximum latency for certain neighbour in list Message, then delete corresponding user equipment information, and the set point of above-mentioned maximum latency is 3min-10min.
Step9:eNodeB is at one D2D list of devices of local maintenance: if there being new D2D user to access, then eNodeB will add Add new D2D user profile in D2D list of devices；If certain equipment in D2D list of devices does not has in the time threshold set Keep and the maintenance of information of eNodeB, then eNodeB will delete the information of this D2D user, above-mentioned maintenance from D2D list of devices Information time length sets according to concrete cell conditions, is typically set at 10s-60min.
The detailed process of D2D equipment room discovery procedure is as it is shown on figure 3, its detailed process is as follows:
Current D2D user's start carries out initialization operation, scans channel.
Current D2D user applies for Stochastic accessing to community, place eNodeB, and reports the identity information of self.
If current D2D user is successfully accessed place subzone network, will be received this by PBCH (physical broadcast) channel little The broadcast message of district eNodeB, the message relating to D2D user in broadcast message includes that this community can be used for the transmission of D2D equipment and sends out The private resource configuration of existing message and discovery cycle etc..The resource found for D2D equipment in LTE-A network in present example As shown in Figure 4, wherein DZ represents the special discovery resource pool of D2D user to configuration figure, by certain cycle TdLoop configuration, special Finding that resource pool comprises time and two dimensions of frequency, each special discovery resource pool crosses over 30ms on time dimension.
ENodeB can be at one D2D list of devices of local maintenance, when there being new D2D user to access by new for interpolation user profile In list, if certain equipment in list does not has to keep and the maintenance of information of eNodeB after reaching certain time length, ENodeB will delete the relevant information of this equipment
Current D2D user, after obtaining place local resource configuration information, will receive before special discovery resource pool arrives ENodeB broadcasts, and the eNodeB in community competes user according to current potential resource before each special discovery resource pool arrives Number, controls the competition number of users in special discovery resource pool adaptively by broadcast.The most not controlled user will be carried out Random sources competition to send self relevant discovery information to surrounding neighbours, the discovery information content of transmission comprise device id, Coded system, synchronization message etc..
Not controlled user's is to be selected in all potential competition users by congestion control mechanism by eNodeB Arriving, detailed process as described above, repeats no more；
In addition if necessary, the in check user of competition can be fixed moving back often further according to eNodeB instruction Keeping away, back off time scope is 4s～512s, and within this period, these users are by no longer competitive resource.
If user competes successfully, then can open associated timer and carry out the timing to the fixed cycle set, the most fixed Time terminate then after just just can carry out resource contention next time by successful user, with safeguard with its neighbor list in D2D user Neighborhood, the above-mentioned fixed cycle is set as the integral multiple in discovery cycle, is typically set at 150s-300s.
The successful D2D user of random competition sends the discovery message of himself except the special discovery resource utilizing competition to arrive Outward, also can carry out blind check by other the unselected discovery resource locations in Current resource pond, with sending out of reception D2D user around Existing message.
If current D2D user receives the discovery message carrying other D2D user profile, according to this discovery message more Self neighbor information list new, and according to neighbor list information by the neighbor information periodic report that updates to eNodeB.
It should be noted that eNodeB can comprise, local maintenance one, the D2D user found mutually, information is arranged Table, and update list according to the reported result of each user.Shi Zhe community that this list comprises is all potential carries out D2D communication Equipment pair, can eNodeB will judge carry out D2D communication between certain two D2D user according to this list.
In sum, the invention provides a kind of D2D equipment autonomously based on adaptive congestion control and find method, this Existing method requires no knowledge about the more specific location information of D2D user, and complexity is low, it is possible to prevent a large amount of by the dynamically regulation of base station It is congested that user carries out resource contention and causes, thus reduces collision probability, improves the utilization ratio of Internet resources.This is external sets In the case of standby or link failure, it is possible to the robustness of network is effectively ensured.
Obviously, the above embodiment of the present invention is only for clearly demonstrating example of the present invention, and is not right The restriction of embodiments of the present invention, for those of ordinary skill in the field, the most also may be used To make other changes in different forms, cannot all of embodiment be given exhaustive here, every belong to this What bright technical scheme was extended out obviously changes or changes the row still in protection scope of the present invention.

Claims (11)

1. a D2D equipment autonomously based on adaptive congestion control finds method, it is characterised in that the method includes following step Rapid:
Step1: in one community of LTE-A network, community eNodeB are used for distributing cell-specific and find resource pool, and set phase Discovery cycle T between adjacent special discovery resource poold, described special discovery resource pool sends for D2D equipment and finds message；
Step2: one or more D2D users carry out Stochastic accessing in community；
Step3: be successfully accessed the D2D user of community, obtains the special discovery money of community by the broadcast of community eNodeB Pond, source and discovery cycle Td；
Step4: community eNodeB competes number of users M according to current potential resourcei, control the most special adaptively by broadcast Find the competition number of users in resource pool, D2D user is divided in check D2D user and uncontrolled D2D user simultaneously；
Step5: described in check D2D user does not carry out the most competing of Current resource before current special discovery resource pool arrives Strive, described uncontrolled D2D user current special discovery resource pool arrive before according to the broadcast message of eNodeB determine into The random competition of row Current resource；
Step6: compete failed user and this in check user and may proceed to connect before next special discovery resource pool arrives Receive base station broadcast message, and repeat above-mentioned Step3-Step5；
The discovery that the successful D2D user of Step7: random competition sends self for utilizing the special discovery resource competed disappears Breath, other the unselected discovery resource locations being additionally operable in Current resource pond carry out blind check, and reception D2D user around sends out Existing message；
Described LTE-A network refers to long-term evolution upgrading network；Described eNodeB refers to evolved mobile base station；Described D2D refers to equipment To equipment communication.
D2D equipment autonomously the most according to claim 1 finds method, it is characterised in that described in be successfully accessed the D2D of community User, the broadcast also by eNodeB obtains the D2D reporting of user cycle.
D2D equipment autonomously the most according to claim 2 finds method, it is characterised in that the method also comprises the steps:
Step8: be successfully received other D2D and the user discover that the D2D user of message is to its neighbor list of eNodeB periodic report, neighbour Occupy neighbor information and newfound neighbor information that list includes safeguarding.
4. find method according to the D2D equipment autonomously that in claim 1-3, any one is described, it is characterised in that described special The running time-frequency resource of Physical Uplink Shared Channel in existing resource occupation LTE-A network.
D2D equipment autonomously the most according to claim 1 finds method, it is characterised in that the method also comprises the steps:
Step9:eNodeB is at one D2D list of devices of local maintenance: if there being new D2D user to access, then eNodeB is new by interpolation D2D user profile is in D2D list of devices；If certain equipment in D2D list of devices does not keep in the time threshold set With the maintenance of information of eNodeB, then eNodeB will delete the information of this D2D user from D2D list of devices.
D2D equipment autonomously the most according to claim 1 finds method, it is characterised in that described discovery cycle TdMore than one Send the signal time domain length finding message, and find cycle TdIntegral multiple for 1ms.
D2D equipment autonomously the most according to claim 1 finds method, it is characterised in that described potential competition user MiBag Include new registration user Mn, last time compete unsuccessfully user MfIn check with last time do not compete user Mc, and Mi=Mn+Mf+Mc。
D2D equipment autonomously the most according to claim 1 find method, it is characterised in that described control adaptively next Competition number of users in special discovery resource pool specifically includes following steps:
Step4.1:eNodeB calculates the expected value of the optimal user number every time carrying out resource contention
The competition number of users M that Step4.2:eNodeB statistics is the most potentiali, and calculate optimum control factor P according to formulaB:
Wherein PBFor optimum control factor, its span is (0～1),For optimal user number expected value, MiFor potential competing Contention amount；
Step4.3:eNodeB before current special discovery resource pool arrives by broadcasting the potential competition user in notifying cell Optimum control factor PB；
Step4.4: after in community, potential user receives broadcast in this equipment one random number P of stochastic generationX；
Step4.5: if PX≤PB, then this user is uncontrolled D2D user；
Step4.6: if PX＞ PB, then this user is in check D2D user.
D2D equipment autonomously the most according to claim 8 finds method, it is characterised in that the expectation of described optimal user number ValueObtained by following calculating:
E ( S ) = m ( 1 - 1 R ) m - 1
Above formula optimal solution is the expected value of optimal user number:
Wherein, E (S) represents that carrying out resource random competition successful user number in each special discovery resource pool expects, m represents Participating in user's number of resource contention, R represents the number of the available resources pair of configuration in special discovery resource pool.
D2D equipment autonomously the most according to claim 1 finds method, it is characterised in that described discovery message comprises D2D The device id of user, coded system and synchronization message.
11. D2D equipment autonomouslies according to claim 1 find methods, it is characterised in that described in check user according to ENodeB instruction is fixed keeping out of the way often, and back off time is 4s～512s, this user not competitive resource in back off time.
CN201610647639.8A 2016-08-09 2016-08-09 A kind of D2D equipment autonomously discovery method based on adaptive congestion control Active CN106162737B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610647639.8A CN106162737B (en) 2016-08-09 2016-08-09 A kind of D2D equipment autonomously discovery method based on adaptive congestion control

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610647639.8A CN106162737B (en) 2016-08-09 2016-08-09 A kind of D2D equipment autonomously discovery method based on adaptive congestion control

Publications (2)

Publication Number Publication Date
CN106162737A true CN106162737A (en) 2016-11-23
CN106162737B CN106162737B (en) 2019-05-17

Family

ID=57329392

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201610647639.8A Active CN106162737B (en) 2016-08-09 2016-08-09 A kind of D2D equipment autonomously discovery method based on adaptive congestion control

Country Status (1)

Country Link
CN (1) CN106162737B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108777856A (en) * 2018-07-17 2018-11-09 北京邮电大学 A kind of virtual UE for the 5G networks that face the future independently is found and process is established in connection
CN112969168A (en) * 2021-02-08 2021-06-15 西安电子科技大学 Method for avoiding maximum value of expected discovery delay of BLE equipment

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103891172A (en) * 2011-08-30 2014-06-25 Lg电子株式会社 Method for supporting device-to-device communication in a cellular network, and apparatus for same
CN104144501A (en) * 2013-05-09 2014-11-12 中兴通讯股份有限公司 D2D discovery signal resource allocation method and system and related devices
US20160057604A1 (en) * 2013-04-16 2016-02-25 Zte Corporation Device-to-Device (D2D) Discovery Method, Base Station, And User Equipment
CN105592523A (en) * 2014-10-21 2016-05-18 中兴通讯股份有限公司 Device discovery apparatus and device discovery method for device-to-device communication

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103891172A (en) * 2011-08-30 2014-06-25 Lg电子株式会社 Method for supporting device-to-device communication in a cellular network, and apparatus for same
US20160057604A1 (en) * 2013-04-16 2016-02-25 Zte Corporation Device-to-Device (D2D) Discovery Method, Base Station, And User Equipment
CN104144501A (en) * 2013-05-09 2014-11-12 中兴通讯股份有限公司 D2D discovery signal resource allocation method and system and related devices
CN105592523A (en) * 2014-10-21 2016-05-18 中兴通讯股份有限公司 Device discovery apparatus and device discovery method for device-to-device communication

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
周伟: "机器类型通信中随机接入信道的拥塞控制研究", 《中国优秀硕士学位论文全文数据库》 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108777856A (en) * 2018-07-17 2018-11-09 北京邮电大学 A kind of virtual UE for the 5G networks that face the future independently is found and process is established in connection
CN112969168A (en) * 2021-02-08 2021-06-15 西安电子科技大学 Method for avoiding maximum value of expected discovery delay of BLE equipment

Also Published As

Publication number Publication date
CN106162737B (en) 2019-05-17

Similar Documents

Publication Publication Date Title
CN105103470B (en) The method and apparatus of multiple cell equipment discovery for device-to-device communication
CN109309969A (en) The method and device thereof of measurement processing are controlled in the rrc-idle mode
CN109495974B (en) Information transferring method and device
US20170366236A1 (en) Method and apparatus for paging using beamforming in wireless communication system
EP3678425B1 (en) Data transmission method and related device
CN105745945B (en) Control the data transmission of the machine type communication in mobile communication system
CN108605311A (en) The multi-carrier operation of narrowband Internet of Things
CN102651908B (en) Method and equipment for transmitting data
CN106464553A (en) Device-to device communications apparatus and methods
CN103168501B (en) Method and apparatus for performing network entry/reentry in wireless communication system
CN106134273A (en) Method that device (D2D) is operated by the device performed by terminal in a wireless communication system and use the terminal of the method
CN105940744A (en) D2D operation method performed by terminal in wireless communication system and terminal using same
CN106961727B (en) Paging and control method and device thereof
CN105940738A (en) D2d operation method performed by terminal in wireless communication system and terminal using same
CN106465332A (en) Optimized mechanism for paging transmission and reception
RU2725663C2 (en) Telecommunication device and methods
CN107580798A (en) The method and apparatus that Stochastic accessing processing is performed in licensing free frequency band
CN105338589A (en) Transmission method and device for random access response message
CN106105355A (en) Method that device (D2D) is operated by the device being performed by terminal in a wireless communication system and the terminal of use the method
CN104168600A (en) Signal transmitting method and device, signal measuring method and device and communication control method and device
CN105453676A (en) System and method for resource allocation for open discovery in device-to-device communications
CN104219690A (en) Measuring controlling method of inter-system neighbor relation and base station
CN108541394A (en) The paging mechanism of wireless network
US20160119835A1 (en) Method of controlling interference in heterogeneous network
CN106233785A (en) The device performed by terminal in a wireless communication system is to device (D2D) operational approach and the terminal of use the method

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
CB03 Change of inventor or designer information

Inventor after: Zhang Jiayi

Inventor after: Deng Likai

Inventor after: Li Xu

Inventor after: Liang Yanan

Inventor before: Zhang Jiayi

Inventor before: Li Xu

Inventor before: Deng Likai

Inventor before: Liang Yanan

CB03 Change of inventor or designer information
GR01 Patent grant
GR01 Patent grant