CN103686931B - A kind of cut-in method and device, user equipment - Google Patents

Abstract

The invention discloses a kind of cut-in method, including：When user equipment (UE) determines that the difference of the receiving power of via node RN signals and the receiving power of host base station signal is in setting range, the access strategy of the access strategy and the access host base station that access the RN according to the UE determines that the UE accesses the access probability of the RN and the host base station respectively, and the access of the UE is performed with identified access probability.The present invention discloses a kind of access device and user equipment.The present invention can reduce the negative effect that backhaul link bottlenecks bring by the strategy based on game, and system throughput flow gain is ensure that to a certain extent, while also ensure that the fairness that UE is accessed.

Description

A kind of cut-in method and device, user equipment

Technical field

The present invention relates to user equipment in relay system (UE, User Eqipment) access technology, more particularly to a kind of base In cut-in method and device, the user equipment of game theory.

Background technology

In the relaying cell of senior long term evolution (LTE-A, Long Term Evolution-Advanced) system, by In the introducing of via node (RN, Relay Node), user equipment (UE, User Eqipment) can be connect by base station (eNB) Enter network, it is also possible to by RN access networks.

Existing most of cut-in methods are the most strong (examples of intensity for using reference signal (RS, Reference Signal) Such as the Reference Signal Received Power (RSRP, Reference Signal Receiving Power) or reference signal of UE measurements The quality of reception (RSRQ, Reference Signal Receiving Quality) is maximum) as basis for estimation.For example, conventional UE access strategies be：When receiving power Pr, RN from RN signals are than the big T1dB of receiving power Pr, eNB from eNB signals When, UE selections RN is accessed, and otherwise selects eNB to access.

When RN passback (backhaul) link-qualities are preferable, the UE in RN coverages is accessed by RN, in theory may be used To improve the transmission rate of itself.But because running time-frequency resource is limited, backhaul links easily become system in relaying cell Bottleneck, the UE in RN coverages can cause scheduling and queue time delay more long when selecting to be accessed by RN, so as to influence System average throughput.

The access selection of multiple UE is influenceed and restriction by interactive relationship.Each UE user is intended to improve the biography of oneself Defeated speed, can then select to be accessed by the more preferable RN of link-quality when access decision-making is carried out, but when UE only passes through RN Prior desired rate gain can not be reached due to scheduling and queue time delay on the contrary during access, so as to reduce throughput of system.

The content of the invention

In view of this, it is a primary object of the present invention to provide a kind of cut-in method and device, user equipment, can guarantee that and be System throughput gain, also ensure that the fairness that UE is accessed.

To reach above-mentioned purpose, the technical proposal of the invention is realized in this way：

A kind of cut-in method, methods described includes：

When the receiving power of RN signals and the difference of the receiving power of host base station signal are in setting range in UE determinations, The access strategy of the access strategy and the access host base station that access the RN according to the UE determines the UE respectively The access probability of the RN and the host base station is accessed, the access of the UE is performed with identified access probability.

Preferably, the UE determines that the receiving power of RN signals and the difference of the receiving power of host base station signal are setting In the range of, it is：

The UE determines that the receiving power of host base station signal described in the received power ratio of the RN signals is big, and the RN The receiving power of signal is less than or equal to the threshold value of setting with the difference of the receiving power of the host base station signal.

Preferably, methods described also includes：

The RN determines that the return link of either own cell does not have enough radio bearer RB resources to provide access for multiple UE When, it is that remaining each RB resource selects more than two UE simultaneously in the multiple UE in each Transmission Time Interval TTI Notify that the mode that the UE more than described two is based on competition accesses the RB resources.

Preferably, methods described also includes：

RN notifies that the mode that two UE are based on competition accesses a remaining RB resource.

Preferably, it is described that the access strategy of the RN is accessed according to the UE and the access plan of the host base station is accessed Slightly determine that the UE accesses the mixing access strategy equilibrium solution of the RN and the host base station respectively, including：

Assuming that UE_iAccess strategy be：UE_iIncome V_iWith current TTI The data transfer achievable rate R for being allowed is represented；UE_iSelection access strategy s_i ¹When obtain income all the time for R=r；And selection connects Enter tactful S_i ²When, if other side selects identical access strategy, it is R=(1+m) r that income is obtained when priority is more than other side, its Middle m is to select RN to access the gain factor for obtaining, 0 ＜ m ＜ 1；The UE when priority is less than other side₁Do not dispatched in current TTI, received Benefit is 0, if other side selects different access strategies, obtains income R=(1+m) r；

It is determined that meeting the mixing access strategy of following formula：

Wherein, s₁ ^*And s₂ ^*It is the balanced access strategy of game；

Virtual participant according to incomplete information static game carries out probability selection to priority, obtains corresponding Game theory；

UE is determined according to the game theory₂Mixing access strategy select probability, be (p₂, 1-p₂), then there is following formula：

Max V₂=P (K₁＞ K₂)[p₁ ^*(p₂*r+(1-p₂)*(1+m)r)+(1-p₁ ^*)(p₂*r+(1-p₂)*0)]+

P(K₁＜ K₂)[p₁ ^*(p₂*r+(1-p₂)*(1+m)r)+(1-p₁ ^*)(p₂*r+(1-p₂)*(1+m)r)]

Wherein, (p₁ ^*, 1-p₁ ^*) it is U₁Mixing access strategy equilibrium solution；

Assuming that UE_iPriority K_iTo be uniformly distributed, then (K₁, K₂) it is joint two dimensional uniform distribution, then P (K₁＜ K₂)=P (K₁＞ K₂)=0.5；Work as p₂When obtaining equilibrium solution, there is p₁ ^*=p₂ ^*=p^*；And following formula is set up：

V₂(p₂ ^*=p^*)=V₂(s₂ ²), i.e.,：

0.5[p^*(p^**r+(1-p^*)*(1+m)r)+(1-p^*)(p^**r+(1-p^*)*0)]+

0.5[p^*(p^**r+(1-p^*)*(1+m)r)+(1-p^*)(p^**r+(1-p^*) * (1+m) r)]=

0.5(1+m)p^**r+0.5(1+m)*r

Solve

Determine U₁Mixing access strategy equilibrium solution be

To access the mixing access strategy equilibrium solution of the RN and the host base station as accessing the RN and institute State the access probability of host base station.

A kind of access device, described device includes the first determining unit, the second determining unit and execution unit, wherein：

First determining unit, for determining that the receiving power of RN signals and the difference of the receiving power of host base station signal exist When in setting range, the second determining unit is triggered；

Second determining unit, for according to the access strategy and the access plan of the access host base station for accessing the RN The access probability for accessing the RN and the host base station is slightly determined respectively；

Execution unit, access is performed with identified access probability.

Preferably, first determining unit is additionally operable to, and determines host base station described in the received power ratio of the RN signals The receiving power of signal is big, and the receiving power of the RN signals is less than with the difference of the receiving power of the host base station signal During equal to the threshold value for setting, determine that the receiving power of via node RN signals and the difference of the receiving power of host base station signal exist In setting range.

Preferably, described device also includes：

Receiving unit, it is multiple UE to determine that the return link of either own cell does not have enough RB resources for receiving the RN It is that remaining each RB resource selects more than two UE in the multiple UE in each TTI when access is provided, this two Modes of the UE based on competition more than individual accesses the notice of the RB resources.

Preferably, the receiving unit is additionally operable to, and receives modes of two UE from the RN based on competition and accesses one The notice of individual remaining RB resources.

Preferably, second determining unit is additionally operable to determine in the following manner to access the RN and the host base station Access probability：

Assuming that UE_iAccess strategy be：UE_iIncome V_iWith current TTI The data transfer achievable rate R for being allowed is represented；UE_iSelection access strategy s_i ¹When obtain income all the time for R=r；And selection connects Enter tactful S_i ²When, if other side selects identical access strategy, it is R=(1+m) r that income is obtained when priority is more than other side, its Middle m is to select RN to access the gain factor for obtaining, 0 ＜ m ＜ 1；The UE when priority is less than other side₁Do not dispatched in current TTI, received Benefit is 0, if other side selects different access strategies, obtains income R=(1+m) r；

It is determined that meeting the mixing access strategy of following formula：

Wherein, s₁ ^*And s₂ ^*It is the balanced access strategy of game；

Virtual participant according to incomplete information static game carries out probability selection to priority, obtains corresponding Game theory；

UE is determined according to the game theory₂Mixing access strategy select probability, be (p₂, 1-p₂), then there is following formula：

Max V₂=P (K₁＞ K₂)[p₁ ^*(p₂*r+(1-p₂)*(1+m)r)+(1-p₁ ^*)(p₂*r+(1-p₂)*0)]+

P(K₁＜ K₂)[p₁ ^*(p₂*r+(1-p₂)*(1+m)r)+(1-p₁ ^*)(p₂*r+(1-p₂)*(1+m)r)]

Wherein, (p₁ ^*, 1-p₁ ^*) it is U₁Mixing access strategy equilibrium solution；

Assuming that UE_iPriority K_iTo be uniformly distributed, then (K₁, K₂) it is joint two dimensional uniform distribution, then P (K₁＜ K₂)=P (K₁＞ K₂)=0.5；Work as p₂When obtaining equilibrium solution, there is p₁ ^*=p₂ ^*=p^*；And following formula is set up：

V₂(p₂ ^*=p^*)=V₂(s₂ ²), i.e.,：

0.5[p^*(p^**r+(1-p^*)*(1+m)r)+(1-p^*)(p^**r+(1-p^*)*0)]+

0.5[p^*(p^**r+(1-p^*)*(1+m)r)+(1-p^*)(p^**r+(1-p^*) * (1+m) r)]=

0.5(1+m)p^**r+0.5(1+m)*r

Solve

Determine U₁Mixing access strategy equilibrium solution be

To access the mixing access strategy equilibrium solution of the RN and the host base station as accessing the RN and institute State the access probability of host base station.

A kind of user equipment, including foregoing access device.

In the present invention, UE determines the receiving power of RN signals and the receiving power of host base station (Donor eNB) signal When difference is in setting range, the access strategy of the access strategy and access host base station that access RN according to UE is determined respectively UE accesses the mixing access strategy equilibrium solution of the RN and host base station；The mixing access strategy of RN and host base station is accessed with UE Equilibrium solution accesses the access probability of RN and host base station respectively as UE, performs the access of the UE.The present invention is by based on rich The strategy played chess, can reduce the negative effect that backhaul link bottlenecks bring, and throughput of system is ensure that to a certain extent Gain, while also ensure that the fairness that UE is accessed.

Brief description of the drawings

Fig. 1 is the flow chart of the cut-in method of the embodiment of the present invention；

Fig. 2 is the structural representation of the income game theory of the access model of the embodiment of the present invention；

Fig. 3 is the composition structural representation of the access device of the embodiment of the present invention.

Specific embodiment

Basic thought of the invention is：UE determines the difference of the receiving power of RN signals and the receiving power of host base station signal When value is in setting range, the access strategy of the access strategy and access host base station that access RN according to UE determines UE respectively Access the mixing access strategy equilibrium solution of the RN and host base station；It is equal with the mixing access strategy that UE accesses RN and host base station Weighing apparatus solution accesses the access probability of RN and host base station respectively as UE, performs the access of the UE.

It is by the following examples and referring to the drawings, right to make the object, technical solutions and advantages of the present invention become more apparent The present invention is further described.

Fig. 1 for the embodiment of the present invention cut-in method flow chart, as shown in figure 1, the cut-in method of this example include with Lower step：

Step 101, UE determines that the receiving power of RN signals and the difference of the receiving power of Donor eNB signals are setting model When enclosing interior, according to UE access RN access strategy and access Donor eNB access strategy determine that UE accesses respectively described in The mixing access strategy equilibrium solution of RN and Donor eNB.

Access strategy based on RS intensity most strong (such as the RSRP or RSRQ of UE measurements are maximum) is inevitably introduced Larger interference causes to relay the congestion of return link, is negatively affected to relay system overall performance, especially when During the similar intensity of the RS from eNB and RN, this negative impact is especially big.

In the present invention, in Donor eNB and RN MPS process fringe regions, the selection of multiple UE access strategies can be utilized Game theory is analyzed, as 0 ＜ P_{R, RN}-P_{R, eNB}＜=T₁When, at this moment UE can both select eNB, it is also possible to select RN to access.T₁ It is given threshold.Selections of the UE to access point is considered as one time game behavior, can by mix access strategy equilibrium solution come Determine that UE accesses the probability of Donor eNB and RN so that each UE accesses remote access point (RAP, Remote Access Point the average yield after) is maximized, and then so that each user at least obtains and passed with the identical in Donor eNB cells Defeated achievable rate r.

The access Shen of multiple users can be supplied to when RN cells there are enough radio bearer (RB, Radio Bear) resources Please when, according to reference signal RS intensity (such as UE measure RSRP or RSRQ), RN can be given with the different RB of certain rule distribution Different users are accessed, and game is not needed in this case.When RN cells are because return link channel quality is bad or has When a large amount of UE need access RN cells (such as Hot Spot) to cause return link to transmit congestion, there is no enough RB resources to carry The access application of the multiple users of supply, i.e., all exist on some or all of RB more than one user need contention access, it is necessary to Selection RS receiving intensities are most strong and all meet 0 ＜ P_{R, RN}-P_{R, eNB}＜=T₁Two UE carry out game, remaining UE can not Enough games on this RB.For remaining UE, can be connect using the RB of search scheduling unique user and therewith by the way of game Enter system.

Assuming that the participant of gambling process is UE₁And UE₂, RN is in each Transmission Time Interval (TTI, Transmission Time Interval) user can only be dispatched on inherent identical RB Resource Block, scheduling strategy is based on priority, use K_iRepresent UE_iThe priority of (i=1,2).Work as UE₁And UE₂When all being accessed by RN, if K₁＞ K₂, then RN dispatched in current TTI UE₁If K1 ＜ K2 dispatch UE in current TTI₂(to simplify the analysis, temporarily ignore K₁=K₂Situation).

UE_iAccess strategy be expressed as follows：I=1,2.UE_iIncome V_i The data transfer achievable rate allowed used in current TTI is represented with R.Assuming that UE_iSelection access strategy s_i ¹When received all the time Benefit is R=r, selection access strategy S_i ²When have two kinds of possibility：If other side selects identical access strategy, when priority is more than other side When to obtain income be R=(1+m) r, wherein 0 ＜ m ＜ 1 access the gain factor for obtaining for selection RN, when priority is less than other side When not current TTI dispatch, income is 0；If other side selects different access strategies, in the absence of competition, income R=(1+ are obtained m)r.In the present invention, access strategy is to represent the various access strategies of access host base station and access the various of via node Access strategy etc., these access strategies are all according to access feature of itself Radio Resource occupancy and UE etc. by network side Determine, can be configured in UE.Because access strategy is different because of the difference of communication system, it not realizes technical scheme Emphasis, also non-difficult point, repeats no more various access strategies here.It will be appreciated by those skilled in the art that according to communication system and Access capability of UE etc. determines that access strategy is easily to realize.

Due to UE_iThe priority type of itself can only be known, it is impossible to know the priority type of other side, therefore this is one Imperfect information Static Game.Determine whether there is a kind of mixing access strategy and meet following formula：

Wherein, s₁ ^*And s₂ ^*It is the balanced access strategy of game.

Due to the symmetry between user, might as well be with UE₂As examination object.Introduce incomplete information static game Virtual participant's " nature " (being represented with N) carries out probability selection to priority, obtains game theory as depicted.Due in Fig. 2 Game theory clearly illustrate the relation of trunk and its child node and child node, its structure is to those skilled in the art Clear enough, its CONSTRUCTED SPECIFICATION is repeated no more here.

Assuming that UE₂Mixing access strategy select probability be (p₂, 1-p₂), then

Max V₂=P (K₁＞ K₂)[p₁ ^*(p₂*r+(1-p₂)*(1+m)r)+(1-p₁ ^*)(p₂*r+(1-p₂)*0)]+P(K₁＜ K₂)[p₁ ^*(p₂*r+(1-p₂)*(1+m)r)+(1-p₁ ^*)(p₂*r+(1-p₂)*(1+m)r)]

Wherein (p₁ ^*, 1-p₁ ^*) it is UE₁Mixing access strategy equilibrium solution.

Assuming that UE_iPriority K_iTo be uniformly distributed, then (K₁, K₂) be joint two dimensional uniform distribution, then P (K₁＜ K₂)=P (K₁＞ K₂)=0.5.Work as p₂When obtaining equilibrium solution, due to the symmetry between user, there is p₁ ^*=p₂ ^*=p^*.Plan is accessed according to mixing Take by force equilibrium solution when with using pure access strategy directly select access should have identical income, so working as UE₂With p₂Obtain Income during equilibrium solution should be with UE₂Revenue equivalence (the now UE for accessing RN is directly selected using pure access strategy₂Income is more than The income for accessing eNB is directly selected using pure access strategy), can obtain：

V₂(p₂ ^*=p^*)=V₂(s₂ ²), i.e.,

0.5[p^*(p^**r+(1-p^*)*(1+m)r)+(1-p^*)(p^**r+(1-p^*)*0)]+

0.5[p^*(p^**r+(1-p^*)*(1+m)r)+(1-p^*)(p^**r+(1-p^*) * (1+m) r)]=

0.5(1+m)p^**r+0.5(1+m)*r

Solve

Therefore UE is obtained_iMixing access strategy equilibrium solution beI.e. withProbability selection pass through Host base station is accessed, withProbability selection by RN access.For example as m=0.5, mixing access strategy equilibrium solution isRepresent that user accesses host base station and the probability of RN is respectively 1/3 and 2/3.

Step 102, RN and place are accessed using the mixing access strategy equilibrium solution that UE accesses RN and host base station as UE The access probability of master base station, performs the access of UE.

UE₁WithProbability selection access host base station, withProbability selection by accessing RN.

In mixing access strategy equilibrium solutionAccess strategy under, investigate user's income, obtain

V_i=r, i=1,2

This explanation user's income is unrelated with m with gain factor size when being accessed by RN.Under access strategy of the invention, Each user at least obtains and the identical transmission achievable rate r in pure eNB cells.Therefore, cut-in method of the invention ensures The achievable rate lower bound of UE statistical averages in the cell, while between ensure that user under the scheduling mode based on priority Fairness.

The present invention realizes an access of UE with the RB in two UE games TTI, so as to realize being accessed based on guarantee The mode of RN and host base station identical income makes UE be linked into one of RN and host base station, but the present invention is not limited in two UE TTI the RB accessed in game, or the UE games TTI of more than three, its implementation with it is foregoing Two UE are essentially identical in the mode of an access game of TTI, and its details is repeated no more here.

Fig. 3 is the composition structural representation of the access device of the embodiment of the present invention, as shown in figure 3, of the invention access dress Put including the first determining unit 30, the second determining unit 31 and execution unit 32, wherein：

First determining unit 30, the difference for determining the receiving power of RN signals and the receiving power of host base station signal When in setting range, the second determining unit 31 is triggered；

Second determining unit 31, for the access according to the access strategy and the access host base station for accessing the RN Strategy determines the mixing access strategy equilibrium solution for accessing the RN and the host base station respectively, to access the RN and described The mixing access strategy equilibrium solution of host base station is respectively as the access probability for accessing the RN and the host base station；

Execution unit 32, access is performed with identified access probability.

Above-mentioned first determining unit 30 is additionally operable to, and determines host base station signal described in the received power ratio of the RN signals Receiving power is big, and the receiving power of the RN signals is less than or equal to set with the difference of the receiving power of the host base station signal During fixed threshold value, determine the difference of the receiving power of via node RN signals and the receiving power of host base station signal in setting model In enclosing.

On the basis of the access device shown in Fig. 3, described device also includes：Receiving unit (not shown in Fig. 3), is used for Receive the RN determine the return link of either own cell do not have enough RB resources for multiple UE access is provided when, in each TTI It is interior, it is that remaining each RB resource selects more than two UE in the multiple UE, more than two UE are based on competition Mode accesses the notice of the RB resources.

Above-mentioned receiving unit is additionally operable to, receive two UE from the RN be based on competition mode access one it is remaining The notice of RB resources.

It will be appreciated by those skilled in the art that above-mentioned receiving unit is to optimize the technical side of access device of the invention Case and set, be not to realize technical characteristic necessary to access device basic technical scheme of the present invention.

Above-mentioned second determining unit 31 is additionally operable to the access for determining to access the RN and the host base station in the following manner Probability：

Assuming that UE_iAccess strategy be：UE_iIncome V_iWith current TTI The data transfer achievable rate R for being allowed is represented；UE_iSelection access strategy s_i ¹When obtain income all the time for R=r；And selection connects Enter tactful S_i ²When, if other side selects identical access strategy, it is R=(1+m) r that income is obtained when priority is more than other side, its Middle m is to select RN to access the gain factor for obtaining, 0 ＜ m ＜ 1；The UE when priority is less than other side₁Do not dispatched in current TTI, received Benefit is 0, if other side selects different access strategies, obtains income R=(1+m) r；

It is determined that meeting the mixing access strategy of following formula：

Wherein, s₁ ^*And s₂ ^*It is the balanced access strategy of game；

Virtual participant according to incomplete information static game carries out probability selection to priority, obtains corresponding Game theory；

The mixing access strategy select probability of UE2 is determined according to the game theory, is (p₂, 1-p₂), then there is following formula：

Max V₂=P (K₁＞ K₂)[p₁ ^*(p₂*r+(1-p₂)*(1+m)r)+(1-p₁ ^*)(p₂*r+(1-p₂)*0)]+

P(K₁＜ K₂)[p₁ ^*(p₂*r+(1-p₂)*(1+m)r)+(1-p₁ ^*)(p₂*r+(1-p₂)*(1+m)r)]

Wherein, (p₁ ^*, 1-p₁ ^*) it is U₁Mixing access strategy equilibrium solution；

Assuming that UE_iPriority K_iTo be uniformly distributed, then (K₁, K₂) it is joint two dimensional uniform distribution, then P (K₁＜ K₂)=P (K₁＞ K₂)=0.5；Work as p₂When obtaining equilibrium solution, there is p₁ ^*=p₂ ^*=p^*；And following formula is set up：

V₂(p₂ ^*=p^*)=V₂(s₂ ²), i.e.,：

0.5[p^*(p^**r+(1-p^*)*(1+m)r)+(1-p^*)(p^**r+(1-p^*)*0)]+

0.5[p^*(p^**r+(1-p^*)*(1+m)r)+(1-p^*)(p^**r+(1-p^*) * (1+m) r)]=

0.5(1+m)p^**r+0.5(1+m)*r

Solve

Determine U₁Mixing access strategy equilibrium solution be

To access the mixing access strategy equilibrium solution of the RN and the host base station as accessing the RN and institute State the access probability of host base station.

It will be appreciated by those skilled in the art that each processing unit in access device shown in Fig. 3 realizes that function can Understand with reference to the associated description of aforementioned access method.It will be appreciated by those skilled in the art that each in access device shown in Fig. 3 The function of processing unit can be realized by running on the program on processor, can also realized by specific logic circuit.

The present invention also describes a kind of user equipment, including the access device shown in earlier figures 3.

The above, only presently preferred embodiments of the present invention is not intended to limit the scope of the present invention.

Claims (11)

1. a kind of cut-in method, it is characterised in that methods described includes：

User equipment (UE) determines that the receiving power of via node RN signals is setting with the difference of the receiving power of host base station signal Determine when in scope, the access plan of the RN is accessed according to the UE in the host base station and the RN MPS process fringe region Slightly and access the access strategy of the host base station by one time game behavior determine respectively the UE accesses RN and The access probability of the host base station, the access of the UE is performed with identified access probability.

2. method according to claim 1, it is characterised in that the UE determines the receiving power and host base station of RN signals The difference of the receiving power of signal in setting range, including：

The UE determines that the receiving power of host base station signal described in the received power ratio of the RN signals is big, and the RN signals Receiving power and the receiving power of the host base station signal threshold value of the difference less than or equal to setting.

3. method according to claim 1 and 2, it is characterised in that methods described also includes：

The RN determine the return link of either own cell do not have enough radio bearer RB resources for multiple UE access is provided when, It is that remaining each RB resource selects more than two UE and notifies in the multiple UE in each Transmission Time Interval TTI The mode that UE more than described two is based on competition accesses the RB resources.

4. method according to claim 3, it is characterised in that methods described also includes：

RN notifies that the mode that two UE are based on competition accesses a remaining RB resource.

5. method according to claim 4, it is characterised in that it is described according to the UE access the access strategy of the RN with And the access strategy of the access host base station determines that the UE accesses the RN and the access of the host base station is general respectively Rate, including：

Assuming that UE_iAccess strategy be：UE_iIncome V_iPermitted with current TTI Perhaps data transfer achievable rate R is represented；UE_iSelection access strategy s_i ¹When obtain income all the time for R=r；And select to access plan Slightly S_i ²When, if other side selects identical access strategy, income is obtained when priority is more than other side for R=(1+m) r, wherein m is Selection RN accesses the gain factor for obtaining, 0<m<1；The UE when priority is less than other side₁Do not dispatched in current TTI, income is 0, If other side selects different access strategies, income R=(1+m) r is obtained；

It is determined that meeting the mixing access strategy of following formula：

$s_1^{*}\&Element;\arg \underset{s_1}{Max}{V}_1(s_1,s_2^{*})$

$s_2^{*}\&Element;\arg \underset{s_2}{Max}{V}_2(s_1^{*},s_2)$

Wherein, s₁ ^*And s₂ ^*It is the balanced access strategy of game；

Virtual participant according to incomplete information static game carries out probability selection to priority, obtains corresponding game Tree；

UE is determined according to the game theory₂Mixing access strategy select probability, be (p₂, 1-p₂), then there is following formula：

Max V₂=P (K₁>K₂)[p₁ ^*(p₂*r+(1-p₂)*(1+m)r)+(1-p₁ ^*)(p₂*r+(1-p₂)*0)]+

P(K₁<K₂)[p₁ ^*(p₂*r+(1-p₂)*(1+m)r)+(1-p₁ ^*)(p₂*r+(1-p₂)*(1+m)r)]

Wherein, (p₁ ^*, 1-p₁ ^*) it is U₁Mixing access strategy equilibrium solution；

Assuming that UE_iPriority K_iTo be uniformly distributed, then (K₁, K₂) it is joint two dimensional uniform distribution, then P (K₁<K₂)=P (K₁>K₂) =0.5；Work as p₂When obtaining equilibrium solution, there is p₁ ^*=p₂ ^*=p^*；And following formula is set up：

V₂(p₂ ^*=p^*)=V₂(s₂ ²), i.e.,：

0.5[p^*(p^**r+(1-p^*)*(1+m)r)+(1-p^*)(p^**r+(1-p^*)*0)]+

0.5[p^*(p^**r+(1-p^*)*(1+m)r)+(1-p^*)(p^**r+(1-p^*) * (1+m) r)]=

0.5(1+m)p^**r+0.5(1+m)*r

Solve

Determine U₁Mixing access strategy equilibrium solution be

To access the mixing access strategy equilibrium solution of the RN and the host base station as accessing the RN and the place The access probability of master base station.

6. a kind of access device, it is characterised in that described device includes the first determining unit, the second determining unit and performs list Unit, wherein：

First determining unit, for determining the difference of the receiving power of RN signals and the receiving power of host base station signal in setting In the range of when, trigger the second determining unit；

Second determining unit, for the connecing according to the access RN in the host base station and the RN MPS process fringe region The access strategy for entering strategy and accessing the host base station determines the access RN and institute respectively by one time game behavior State the access probability of host base station；

Execution unit, access is performed with identified access probability.

7. device according to claim 6, it is characterised in that first determining unit is additionally operable to, determines the RN letters Number received power ratio described in host base station signal receiving power it is big, and the receiving power of the RN signals and host's base Stand signal receiving power difference less than or equal to setting threshold value when, determine receiving power and the host of via node RN signals The difference of the receiving power of base station signal is in setting range.

8. the device according to claim 6 or 7, it is characterised in that described device also includes：

Receiving unit, the return link of either own cell is determined for receiving the RN does not have enough RB resources to be provided for multiple UE Be that remaining each RB resource selects more than two UE in the multiple UE in each TTI during access, this two with On UE be based on the mode of competition and access the notice of the RB resources.

9. device according to claim 8, it is characterised in that the receiving unit is additionally operable to, receives from the RN's Modes of two UE based on competition accesses a notice for remaining RB resources.

10. device according to claim 9, it is characterised in that second determining unit is additionally operable to true in the following manner Surely the access probability of the RN and the host base station is accessed：

Assuming that UE_iAccess strategy be：UE_iIncome V_iPermitted with current TTI Perhaps data transfer achievable rate R is represented；UE_iSelection access strategy s_i ¹When obtain income all the time for R=r；And select to access plan Slightly S_i ²When, if other side selects identical access strategy, income is obtained when priority is more than other side for R=(1+m) r, wherein m is Selection RN accesses the gain factor for obtaining, 0<m<1；The UE when priority is less than other side₁Do not dispatched in current TTI, income is 0, If other side selects different access strategies, income R=(1+m) r is obtained；

It is determined that meeting the mixing access strategy of following formula：

$s_1^{*}\&Element;\arg \underset{s_1}{Max}{V}_1(s_1,s_2^{*})$

$s_2^{*}\&Element;\arg \underset{s_2}{Max}{V}_2(s_1^{*},s_2)$

Wherein, s₁ ^*And s₂ ^*It is the balanced access strategy of game；

Virtual participant according to incomplete information static game carries out probability selection to priority, obtains corresponding game Tree；

UE is determined according to the game theory₂Mixing access strategy select probability, be (p₂, 1-p₂), then there is following formula：

Max V₂=P (K₁>K₂)[p₁ ^*(p₂*r+(1-p₂)*(1+m)r)+(1-p₁ ^*)(p₂*r+(1-p₂)*0)]+

P(K₁<K₂)[p₁ ^*(p₂*r+(1-p₂)*(1+m)r)+(1-p₁ ^*)(p₂*r+(1-p₂)*(1+m)r)]

Wherein, (p₁ ^*, 1-p₁ ^*) it is U₁Mixing access strategy equilibrium solution；

Assuming that UE_iPriority K_iTo be uniformly distributed, then (K₁, K₂) it is joint two dimensional uniform distribution, then P (K₁<K₂)=P (K₁>K₂) =0.5；Work as p₂When obtaining access strategy equilibrium solution, there is p₁ ^*=p₂ ^*=p^*；And following formula is set up：

V₂(p₂ ^*=p^*)=V₂(s₂ ²), i.e.,：

0.5[p^*(p^**r+(1-p^*)*(1+m)r)+(1-p^*)(p^**r+(1-p^*)*0)]+

0.5[p^*(p^**r+(1-p^*)*(1+m)r)+(1-p^*)(p^**r+(1-p^*) * (1+m) r)]=

0.5(1+m)p^**r+0.5(1+m)*r

Solve

Determine U₁Mixing access strategy equilibrium solution be

To access the mixing access strategy equilibrium solution of the RN and the host base station as accessing the RN and the place The access probability of master base station.

11. a kind of user equipmenies, it is characterised in that the user equipment includes the access dress described in any one of claim 6 to 9 Put.