CN103188788B - The time control method of heterogeneous network and access point - Google Patents

Abstract

The present invention is applicable to the communications field, it is provided that the time control method of a kind of heterogeneous network and access point, and described method comprises the steps: to determine that the timing base AP of target AP in heterogeneous network, target AP are the AP needing to be timed；Target AP, with timing base AP as timing base, carries out uplink receiving timing and/or the adjustment of downlink timing.The method that the present invention provides can be implemented in the synchronization of user side multiple AP downstream signal, the uplink signal synchronization of the user with different service AP close from geographical position is received at AP side joint, such that it is able to the performance of the related physical channels such as the primary synchronization channel improved in heterogeneous network, auxiliary synchronization channel, it is simple to the realization of the enhancement techniques such as CoMP.

Description

The time control method of heterogeneous network and access point

Technical field

The invention belongs to the communications field, particularly relate to time control method and the access point of heterogeneous network.

Background technology

Along with the data service extensive application in wireless traffic, the utilization ratio of frequency spectrum resource increasingly obtains the attention of communication equipment business and operator, the method thereby producing various raising spectrum efficiency, such as SU-MIMO (SingleUserMultipleInputMultipleOutput, single user multiple-input, multiple-output), MU-MIMO (MultipleUserMultipleInputMultipleOutput, multi-user's multiple-input, multiple-output), high order modulation and currently compare heterogeneous network (HeterogeneousNetwork, the Het-Net) technology etc. discussed warmly.The method of above-mentioned several raising spectrum efficiencies is obtained for employing in 3GPPLTE standard.

Het-Net is currently to compare the enhancement techniques discussed warmly, its core is to dispose a number of low-power node (LowPowerNode in the coverage of macrocell, LPN), utilize cell splitting technology or spectrum reuse technique to increase usable spectrum resource, improve the handling capacity in unit geographic areas.Compared with macrocell, LPN has relatively low downlink general power, and therefore LPN has less coverage.Difference with tradition homogeneous network (HomogeneousNetwork, Homo-Net) is macrocell in Het-Net, and LPN over a coverage area can be completely overlapped, and in Homo-Net, only there is overlap at cell edge.In the case of Het-Net, inter-cell uplink and the increase of descending interference, and interference cases is increasingly complex.In order to realize the AF panel under Het-Net scene, between base station, the coordination of interference can be achieved in by the interference information between X2 interface intercommunication community.Describe for convenience, the definition of several technical terms given below:

Service Access Point (AccessPoint, AP): and/or upstream signals descending for user provides the AP of timing, and provides the user the up and/or node of downstream service determined by rule certain according to this service AP.Each user has at least one service AP.

Cooperation AP: according to put on the node of row and downstream service determined by certain rule for user.Each user can not cooperate AP.

Non-serving AP: for given user, the AP outside the business AP and cooperation AP that takes off mourning clothes.

Referring to Fig. 1, the service AP provided for prior art and the relative timing relationship figure of non-serving AP, the service AP of user UE1 (UserEnd, subscriber terminal equipment) is AP₁, AP₁And AP₂Downlink timing alignment, analyze the downlink signal of each AP downlink reception synchronization extent in user side separately below and user uplink launch the signal uplink receiving synchronization extent at each AP.

In the downlink, due to service AP, propagation delay difference or the other reasons such as use due to repeater (Repeater) between non-serving AP and targeted customer, the descending interference signal from non-serving AP is caused to occur that symbol level is asynchronous with from the descending disturbed signal servicing AP in user side.As in figure 2 it is shown, due to AP₁To UE₁Signal time delay lag₁Relative to AP₂To UE₂Signal time delay lag₂Bigger so that down receiving signal is at user UE₁Side and UE₂Side all occurs asynchronous, this asynchronous make CoMP (CoordinatedMultiplePoint, multipoint cooperative) technology etc. cannot realize, the penalty such as related physical channel (such as primary synchronization channel (PSS), auxiliary synchronization channel (SSS)).

For up-link, the upward signal of user cannot be made all to realize sign synchronization at service AP and non-serving AP after propagation delay also due to similar reason causes servicing up transmitting timing advance (TimingAdvance, TA) determined by AP.As it is shown on figure 3, AP₂To UE₂Signal time delay be lag₂, AP₁To UE₁Signal time delay be lag₁, thus user is at user side UE₁And UE₂Up transmitting timing advance (relative to downlink reception timing) is respectively 2lag₁And 2lag₂, at this under up timing cases, at AP₁Side, for user UE₁Uplink receiving signal ((4) as in Fig. 3) and the timing of downlink signal ((1) as in Fig. 3) be alignment, at AP₂Side, for user UE₂Uplink receiving signal ((5) as in Fig. 3) and downlink signal ((2) as in Fig. 3) timing also be alignment, but user UE₁And UE₂Upward signal at AP₁And AP₂It is all asynchronous, if the reception time difference of (7) in Fig. 3 and corresponding signal is beyond Cyclic Prefix (CyclicPrefix, CP) length.This upstream signals causes the penalty of ascending control channel in the asynchronous meeting of symbol level receiving AP, and the enhancement techniques such as up CoMP cannot use.

Summary of the invention

The purpose of the embodiment of the present invention is to provide the time control method of a kind of heterogeneous network, aim at the synchronization at user side multiple AP downstream signal, the problem receiving the uplink signal synchronization of the user with different service AP close from geographical position at AP side joint.

On the one hand, it is provided that the time control method of a kind of heterogeneous network, described method includes:

Determine the timing base AP of target access AP in heterogeneous network, described target AP is the AP needing to be timed, the timing base AP of wherein said target AP determined in heterogeneous network includes: at least one in the reception power of the signal receiving the AP searched according to footprint size, transmitting power and target AP of the AP searched determines the timing base AP of described target AP, or determines the timing base AP of described target AP according to the information whether in the AP searched with described target AP；

Described target AP, with timing base AP as timing base, carries out uplink receiving timing and/or the adjustment of downlink timing.

On the other hand, additionally providing the time control method of another kind of a kind of heterogeneous network, described method includes:

Timing base access point AP provides timing base for target AP, so that described target AP is with described timing base AP as timing base, carry out uplink receiving timing and/or the adjustment of downlink timing, wherein, described timing base AP is the described target AP footprint size according to the AP searched, launch power, and target AP receive the signal of AP that searches receive in power at least one determine as described in the AP of timing base of target AP, or for described target AP according to the information whether in the AP searched with described target AP determine as described in the AP of timing base of target AP, described target AP is the AP needing in heterogeneous network to be timed.

On the other hand, additionally providing a kind of access point, described access point is target AP needing in heterogeneous network to be timed, and described access point includes:

Timing base AP determines unit, timing base AP for described target access AP, the wherein said timing base AP determining target AP includes: at least one in the reception power of the signal receiving the AP searched according to footprint size, transmitting power and target AP of the AP searched determines the timing base AP of described target AP, or determines the timing base AP of described target AP according to the information whether in the AP searched with described target AP；

Timing adjustment module, for timing base AP as timing base, carries out uplink receiving timing and/or the adjustment of downlink timing to described target AP.

On the other hand, additionally provide another kind of access point, described access point is for providing timing base for target AP, so that described target AP is with described access point as timing base, carry out uplink receiving timing and/or the adjustment of downlink timing, wherein, described access point is the described target AP footprint size according to the AP searched, launch power, and target AP receive the signal of AP that searches receive in power at least one determine as described in the AP of timing base of target AP, or for described target AP according to the information whether in the AP searched with described target AP determine as described in the AP of timing base of target AP, described target AP is the AP needing in heterogeneous network to be timed.

In embodiments of the present invention, target AP is by the footprint size according to the AP searched, launch power, and target AP receive the signal of AP that searches receive in power at least one determine the timing base AP of this target AP, may thereby determine that out the suitable AP timing base AP as this target AP, timing base is provided for target AP by this timing base AP, adjust the up-downgoing timing of target AP, it is achieved in the synchronization at user side multiple AP downstream signal, the uplink signal synchronization of the user with different service AP close from geographical position is received at AP side joint, such that it is able to the primary synchronization channel improved in heterogeneous network, the performance of the related physical channels such as auxiliary synchronization channel, the enhancement techniques such as CoMP can be realized.

Accompanying drawing explanation

Fig. 1 is the service AP relative timing relationship figure with non-serving AP of prior art offer；

Fig. 2 is the down receiving signal of the heterogeneous network that prior art the provides asynchronous exemplary plot in user side；

Fig. 3 is that the upstream signals of the heterogeneous network that prior art provides is in the asynchronous exemplary plot of symbol level receiving AP side；

Fig. 4 is the flowchart of the time control method of the heterogeneous network that the embodiment of the present invention provides；

Fig. 5 a, 5b are the exemplary plot of the first timing controlled mode that the embodiment of the present invention provides；

Fig. 6 a, 6b are the exemplary plot of the second timing controlled mode that the embodiment of the present invention provides；

Fig. 7 a, 7b are the exemplary plot of the third timing controlled mode that the embodiment of the present invention provides；

Fig. 8 a, 8b are the exemplary plot of the 4th kind of timing controlled mode that the embodiment of the present invention provides；

Fig. 9 a, 9b are the exemplary plot of the 5th kind of timing controlled mode that the embodiment of the present invention provides；

Figure 10 a, 10b are the exemplary plot of the 6th kind of timing controlled mode that the embodiment of the present invention provides；

Figure 11 a, 11b are the exemplary plot of the 7th kind of timing controlled mode that the embodiment of the present invention provides；

Figure 12 a, 12b are the exemplary plot of the 8th kind of timing controlled mode that the embodiment of the present invention provides；

Figure 13 a, 13b, 13c are the exemplary plot of the 9th kind of timing controlled mode that the embodiment of the present invention provides；

Figure 14 is the timing controlled exemplary plot under different timing controls mode of operation that the embodiment of the present invention provides；

Figure 15 is that the initial timing that the embodiment of the present invention provides controls the flowchart of the time control method of heterogeneous network under mode of operation；

Figure 16 is the flowchart of the time control method of heterogeneous network under the periodicity timing controlled mode of operation that the embodiment of the present invention provides；

Figure 17 is the flowchart of the time control method of heterogeneous network under the event-triggered timing controlled mode of operation that the embodiment of the present invention provides；

Figure 18 is the structured flowchart of the access point that the embodiment of the present invention provides；

Figure 19 to 22 is the structured flowchart that the timing base AP in Figure 18 that the embodiment of the present invention provides determines unit；

Figure 23 to 30 is the structured flowchart of timing adjustment module in what the embodiment of the present invention provided Figure 18.

Detailed description of the invention

In order to make the purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.

For the ease of the present invention is clearly described, the several technical terms that the present embodiments relate to first are described at this:

Up correction amount^ULWith descending correction amount^DL: it is the parameter relevant to target AP, for different targets AP, up correction amount^ULValue can be identical or different, descending correction amount^DLValue can also be identical or different.The value that it should be noted that both just can be, it is also possible to is negative, it is also possible to be zero.The most optional up correction amount^ULWith descending correction amount^DLObtaining value method include:

Method one:

Determine the radius size of target AP institute coverage according to the network planning, the more up correction amount of this target AP is set according to the radius size of target AP institute coverage^ULWith descending correction amount^DLValue size, specific as follows:

|Δ^DL|=| Δ^UL|=α r/v

Wherein, r is the up or descending covering radius size of target AP overlay area determined by the network planning, and α is the parameter being adjusted according to real network scene and other factors, and v is the light velocity.

Method two:

Up transmitting timing advance TA according to the serviced user of target AP is estimated, the serviced user of target setting AP is { UE_j, target AP is that each user safeguards propagation delay time amount Delay therebetween_j, then its method of estimation can be；

|Δ^DL|=α max ({ Delay_j})

α is the parameter being adjusted according to real network scene and other factors.

The system information of community: this system information includes but not limited to transmitting power, the covering size information etc. of community of the reference signal estimated for path loss.

What Fig. 4 showed the time control method of the heterogeneous network that one embodiment of the invention provides realizes flow process, and details are as follows:

S101, determines the timing base AP of target AP in heterogeneous network, and wherein target AP needs the AP being timed in being heterogeneous network.

In the present embodiment, when target AP is added to heterogeneous network, it is this target AP and determines the timing base AP for providing benchmark timing.Wherein determine that the timing base AP of target AP in heterogeneous network includes: according to the footprint size of the AP searched, launch power and target AP receive the AP searched signal receive in power at least one or determine the timing base AP of described target AP according to the information whether in the AP searched with described target AP.

Wherein determine that the concrete mode of the timing base AP of target AP in heterogeneous network includes but not limited to following several:

The mode of first kind of way control station configuration, its concrete configuration process is as follows:

Configuration information according to control station determines the timing base AP of target AP.In the present embodiment, when being target AP configuration timing base AP by control station, the footprint size of the AP that can search according to target AP, launch power and whether AP that at least one or the root object AP that receive in power of signal that target AP receives the AP searched can search have the information of described target AP to select timing base AP for target AP.Wherein, the mode of the basic AP of control station configuration timing is referred to subsequent target AP and determines the corresponding description in the embodiment of timing base AP.It is understood that the concrete mode that control station determines the timing base AP of target AP in heterogeneous network can also include other various ways, the present embodiment differs a citing.

The second way is for intercepting and estimation mode, and i.e. target AP search AP around, estimates the timing base AP corresponding to target AP.Its detailed process is as follows:

1, target AP searches for AP on the frequency spectrum resource specified, setting search to AP collection be combined into { AP_i, i=1,2 ... N}, wherein N is the AP number that target AP searches, N >=1；The resource frequency spectrum wherein specified refers to when target AP provides service for the user in heterogeneous network, the frequency spectrums of operation specified for this target AP.

2, target AP reads each AP searched_iSystem information, from this system information, obtain this AP_iFor the transmitting power of the reference signal that path loss (PatbLoss) is estimated, obtain launching power setAnd measure the reception power of each reference signal, obtain receiving power set { RSRP_i, i=1,2 ... N}；

3, target AP is according to launching power setWith reception power set { RSRP_i, i=1,2 ... N} estimates the AP belonging to target AP, and the AP belonging to target AP is defined as the timing base AP of this target AP.It specifically comprises the following steps that

A, reception power { RSRP to the reference signal of all AP searched_i, i=1,2 ... N} is ranked up the most successively, i.e. { RSRP_index(k), k=1,2 ... N, index (k) ∈ [1,2 ... N] }, wherein RSRP_index(1)≥RSRP_index(2)≥…≥RSRP_index(N)；

B, transmitting power to all AP searchedBeing ranked up the most successively, obtaining maximum therein is P_max；

C, setting m=1；

If DMeet following condition:Then Cell_index(m)Corresponding AP is the timing base AP of target AP, otherwise, after m=m+1, returns step D.Wherein Δ is a predefined threshold value.

Yes it is appreciated that, it is also possible to combining by other means to launch power and receive power and determine timing base AP, this is not limited by the present embodiment.

The third mode is for intercepting and AP information interaction approach, i.e. target AP searches for AP around, and is connected with the AP foundation searched, and by determining the timing base AP of target AP alternately with the information of the AP searched, it specifically comprises the following steps that

1, target AP searches for AP on the frequency spectrum resource specified, setting search to AP collection be combined into { AP_i, i=1,2 ... N}, wherein N is the AP number that target AP searches, N >=1；

2, for set of cells { AP_i, i=1,2 ... each community in N}, target AP proceeds as follows:

A, setting i=1；

B, target AP and AP_iSet up and connect；

C, target AP and AP_iThe information of carrying out is mutual, if AP_iSide has the relevant information of this target AP information such as () the ID marks such as target AP, then by this AP_iIt is defined as the timing base AP of target AP, after otherwise i=i+1 is set, returns step B.4th kind of mode is for intercepting and coverage information interactive mode, and i.e. target AP search AP around, reads the system information of the AP searched, determine the timing base AP of target AP according to the system information of AP, and it specifically comprises the following steps that

1, target AP searches for AP on the frequency spectrum resource specified, setting search to AP collection be combined into { AP_i, i=1,2 ... N}, wherein N is the AP number that target AP searches, N >=1；

2, target AP reads the system information of each AP searched, and obtains the covering size information of each AP from this system information.Wherein cover size information to represent with L (representing overlay area bigger), M (overlay area is medium), S (representing overlay area less) etc., certainly covering size information can also be adopted and be presented in other ways, does not limits at this.Wherein the covering size information of AP can be by AP launches the value obtained after power quantifies, concrete, the scope needs of the transmitting power that the bigger L in overlay area, the medium M in overlay area and the less S in overlay area represent respectively determine by the transmitting power of AP each in heterogeneous network is carried out Comprehensive Correlation, and differ an illustration at this；

3, the reference signal for path loss estimation of target AP each AP to searching measures, and estimates the reception power RSRP of this reference signal_i；

4, the covering size information of described each AP, the several AP selecting coverage maximum from the AP searched form AP subset { AP_index(j), j=1,2 ... M, M≤N}.It is illustrated below: the AP according to covering in the size information AP set to searching is ranked up, one or more AP covering size information maximum is formed corresponding AP subset, as being L to the maximum when covering size, if covering size is the more than one of L, then the AP that all covering sizes are L is formed corresponding AP subset.

5, AP subset { AP_index(j), j=1,2 ... the reception power RSRP of each AP in M, M≤N}_iSize, by AP subset { AP_index(j), j=1,2 ... RSRP in M, M≤N}_iThe AP of value maximum is defined as the timing base AP of target AP.

Yes it is appreciated that, it is also possible to combining by other means to cover size information and receive power and determine timing base AP, this is not limited by the present embodiment.In an alternative embodiment of the invention, AP around search target AP, at least one in the reception power of the signal receiving the AP searched according to footprint size, transmitting power and target AP of the AP searched determines that the timing base AP of described target AP includes:

Described target AP searches for AP on the frequency spectrum resource specified, setting search to AP collection be combined into { AP_i, i=1,2 ... N}, wherein N is the AP number that described target AP searches, N >=1；

Described target AP reads each AP searched_iSystem information, from described system information, obtain described each AP_iFor the transmitting power of the reference signal that path loss is estimated, obtain launching power setOr measure the reception power of each reference signal, obtain receiving power set { RSRP_i, i=1,2 ... N}, or from described system information, obtain the covering size information of each AP；

Described target AP is by described transmitting power setThe AP corresponding to maximum be set to the timing base AP of described target AP, or described target AP is by described reception power set { RSRP_i, i=1,2 ... the AP corresponding to maximum in N} is set to the timing base AP of described target AP, or described target AP will cover the AP corresponding to the maximum in size information and be set to the timing base AP of described target AP.When described transmitting power setMaximum when having multiple, from described maximum, arbitrarily select one.As described reception power set { RSRP_i, i=1,2 ... when the maximum in N} has multiple, from described maximum, arbitrarily select one.When the maximum in described covering size information has multiple, from described maximum, arbitrarily select one.

In embodiments of the present invention, target AP is by the footprint size according to the AP searched, launch power, and target AP receive the signal of AP that searches receive in power at least one determine the timing base AP of this target AP, may thereby determine that out the suitable AP timing base AP as this target AP, as can determine that the bigger AP in overlay area timing base AP as this target AP, the timing base provided by the timing base AP bigger according to this coverage adjusts the up-downgoing timing of the less AP in overlay area, it is achieved in the synchronization at user side multiple AP downstream signal, the uplink signal synchronization of the user with different AP close from geographical position is received at AP side joint.

S102, target AP, with timing base AP as timing base, carries out uplink receiving timing and/or the adjustment of downlink timing.

Wherein target AP is with timing base AP as timing base, and the mode of the adjustment carrying out uplink receiving timing and/or downlink timing includes but not limited to following several ways, for convenience of description, in follow-up description, all assumes that timing base AP is AP₁, target AP is AP₂, AP₁For UE₁Service AP, AP₂For UE₂Service AP.

First kind of way is target AP down-going synchronous timing base AP, and as shown in Figure 5 a, it specifically comprises the following steps that

1.1, target AP carries out synchronize with the downstream signal of timing base AP, it is thus achieved that the downstream signal of timing base AP is in the downlink reception timing of target AP；

1.2, the descending correction amount of target AP is used^DLAdjust the downlink reception timing obtained, the downlink that downlink reception timing determination the is target AP downstream signal timing after adjusting.

In order to make it easy to understand, refer to Fig. 5 b, with a concrete example, foregoing is described in detail below.

1) target AP carries out synchronize with the downstream signal of timing base AP, now, and target AP side (i.e. AP₂Side) downlink reception timing (as shown in (2) in Fig. 5 b) be timing base AP (i.e. AP₁) downlink timing (as shown in (1) in Fig. 5 b) carry out certain skew, this skew lag₁Represent, lag₁For the propagation delay of timing base AP to target AP, as represented by Fig. 5 b (2): T_{Bechmark, dl}=T₀+lag₁, wherein T_{Bechmark, dl}For timing base AP downlink signal target AP downlink reception timing, T₀Downlink timing for timing base AP；

2) descending correction amount is used^DLThe downlink signal of the timing base AP obtained is adjusted in the downlink reception timing of target AP, and the downlink timing of target AP that downlink reception timing determination is final utilization after adjusting, as shown in Fig. 5 b (3): T_dl=T_{Bechmark, dl}-Δ^DL, wherein T_dlFor the downlink timing after adjusting；

3) user UE target AP serviced_i(such as UE₂) downstream signal apply the timing of this downlink, as Fig. 5 b (4) represented by, the downlink reception of user UE side is regularly as shown in Fig. 5 b (5).

The second way is target AP upstream synchronous timing benchmark AP, and timing base AP feeds back to target AP, and as shown in Figure 6 a, it specifically comprises the following steps that

2.1, target AP carries out uplink synchronous to timing base AP transmitting uplink synchronizing signals, and target AP obtains it according to the feedback of timing base AP and launches regularly in the up of timing base AP synchronization；

2.2, the up correction amount of target AP is used^ULUp transmitting timing to being obtained is adjusted, the uplink receiving that up transmitting timing determination the is target AP upward signal timing after this being adjusted；

2.3, according to the uplink receiving timing of target AP, the propagation delay time between target AP and its serviced user determines the up transmitting timing of described user.

In order to make it easy to understand, refer to Fig. 6 b, with a concrete example, foregoing is described in detail below.

1) target AP is Tong Bu with timing base AP downstream signal, as shown in Fig. 6 b (2)；

2) target AP launches uplink synchronizing signals to timing base AP, carries out uplink synchronous with timing base AP, under synchronous regime, and the up transmitting timing T of target AP_{Bechmark, ul}As shown in Fig. 6 b (3), i.e. T_{Bechmark, ul}=T_{Bechmark, dl}-(2lag₁+ OffSet), due to T_{Bechmark, dl}=T₀+lag₁, so T_{Bechmark, ul}=T₀-lag₁-OffSet, wherein OffSet is the skew between the uplink receiving timing of timing base AP side and downlink timing, 2lag₁The value of+OffSet is obtained from the feedback information of timing base AP by target AP；

3) up correction amount is used^ULAdjust the uplink receiving timing of target AP side, i.e. T_{Bechmark, ul}=T_{Bechmark, ul}+Δ^UL, target AP uses the T after adjusting_{Becbmark, ul}Uplink receiving timing as target AP；

4) for servicing all user UE that AP is target AP_i, UE_iDownlink reception timing as shown in Fig. 6 b (5), wherein lag_iFor target AP to user UE_iPropagation delay, then UE_iUp transmitting timing to target AP is T_{Ul, i}, wherein:

T_{Ul, i}=T_{Bechmark, ul}+Δ^UL-lag_i=T₀-lag₁-OffSet+Δ^UL-lag_i

5)UE_iWith target AP under synchronous regime target AP uplink receiving timing as shown in Fig. 6 b (7).

The third mode is that descending measurement of user of timing base AP is estimated timing adjustment amount and feed back to target AP, and as illustrated in figs. 7 a and 7b, it specifically comprises the following steps that

Timing base AP obtains user set { Ue_i, i=1,2 ... L}, the user Ue in this user set_iService AP be timing base AP and this user set in user near target AP, wherein L is the sum of described user.In embodiments of the present invention, optionally, use A3 reporting events timing base AP mode judge user whether near target AP, its detailed process belongs to prior art, does not repeats them here.

3.1, the user Ue in user's set_iCarry out down-going synchronous with timing base AP, obtain downlink reception timing (as shown in (2) in Fig. 7 b) from timing base AP；

3.2, the user Ue in user's set_iCarry out down-going synchronous with target AP, obtain downlink reception timing (as shown in (1) in Fig. 7 b) from target AP；

3.3, the user Ue in user's set_iThe timing time difference of both two the downlink reception timing estimation acquired in utilization, and by this timing time difference uplink feedback to timing base AP；

3.4, the timing adjustment amount required for downlink reception timing TDOA estimation target AP that the user in timing base AP utilizes user to gather is fed back；

3.5, target AP obtains self required timing adjustment amount alternately by the information between timing base AP；

3.6, target AP utilizes obtained timing adjustment amount to carry out uplink receiving timing and/or the adjustment of downlink timing.

Wherein target AP utilize obtained timing adjustment amount carry out uplink receiving regularly and/or downlink adjustment regularly step particularly as follows:

Postponing the downlink timing of target AP, the time size of delay is timing adjustment amount；

The uplink receiving timing of target AP in advance, time size in advance is timing adjustment amount.

4th kind of mode is user's descending measurement estimation timing adjustment amount of target AP and feeds back to target AP, and as shown in Fig. 8 a, 8b, it specifically comprises the following steps that

All or part of user's collection that target setting AP is serviced is combined into { ue_i, i=1,2 ... L}, wherein L is the sum of described user.

4.1, the user ue in user's set_iCarry out down-going synchronous with timing base AP, obtain downlink reception timing (as shown in (2) in Fig. 8 b) from timing base AP；

4.2, the user ue in user's set_iCarry out down-going synchronous with target AP, obtain downlink reception timing (as shown in (1) in Fig. 8 b) from target AP；

4.3, the user ue in user's set_iThe timing time difference of both two the downlink reception timing estimation acquired in utilization, and by this timing time difference uplink feedback to target AP；

4.4, the transmitting timing adjustment amount required for downlink reception timing TDOA estimation target AP that the user during target AP utilizes user to gather is fed back；

4.5, target AP utilizes the timing adjustment amount of launching obtained to carry out uplink receiving timing and/or the adjustment of downlink timing.

Wherein target AP utilize obtained launch timing adjustment amount carry out uplink receiving timing and/or downlink timing adjustment step particularly as follows:

Postponing the downlink timing of target AP, the time size of delay is timing adjustment amount；

The uplink receiving timing of target AP in advance, time size in advance is timing adjustment amount.

Fifth procedure is that timing base AP estimates timing adjustment amount according to the propagation delay time with self serviced user and feeds back to target AP, and as illustrated in fig. 9, it specifically comprises the following steps that

Timing base AP obtains user set { Ue_i, i=1,2 ... L}, the service AP of user in this user set be timing base AP and this user gather in user near target AP, wherein L is the sum of described user.

5.1, timing base AP is by the propagation delay time between up transmitting timing advance (TimingAdvance, TA) estimation timing base AP and its serviced user of its serviced user；

5.2, timing base AP utilize self downlink timing and this user gather interior user propagation delay time estimate target AP downlink timing；

5.3, target AP is its downlink estimated timing by obtaining alternately by timing base AP with the information of timing base AP；

5.4, target AP utilizes this downlink timing and currently used downlink timing estimation timing adjustment amount；

5.5, target AP utilizes obtained timing adjustment amount to carry out its downlink timing and/or the adjustment of uplink receiving timing.

Wherein target AP utilize obtained timing adjustment amount carry out uplink receiving regularly and/or downlink adjustment regularly step particularly as follows:

Postponing the downlink timing of target AP, the time size of delay is timing adjustment amount；

The uplink receiving timing of target AP in advance, time size in advance is timing adjustment amount.

In order to make it easy to understand, refer to Fig. 9 b, with a concrete example, foregoing is described in detail below.

Target AP interacts with timing base AP community, obtains the downlink timing of target AP side, wherein UE_iService AP be timing base AP；

1) timing base AP has the downlink timing T of self₀, as shown in Fig. 9 b (1)；

2) timing base AP estimates the timing offset of target AP side downlink timing relative timing benchmark AP, and its implementation can be:

A) timing base AP obtains user set { Ue_i, i=1,2 ... L}, the service AP of user in this user set be timing base AP and this user gather in user near target AP, wherein L is the sum of described user；

B) timing base AP gathers { Ue according to acquired user_i, i=1,2 ... up transmitting timing advance TA of L}_iEstimate descending time delay D elay of user_i, as shown in 9b (2), TA here_iFor user side up transmitting timing with downlink reception timing between skew, as shown in Fig. 9 b (3)

${\mathrm{Delay}}_i=\frac{{\mathrm{TA}}_i-\mathrm{OffSet}}{2}$

Wherein OffSet is the skew between the uplink receiving timing of timing base AP side and downlink timing.

C) timing base AP gathers { Ue according to acquired user_i, i=1,2 ... the descending time delay set { Delay of L}_i, i=1,2 ... L} estimates the downlink timing initial bias Δ relative to the timing of timing base AP side downlink of target AP side_{Offset, dl}, optional method of estimation includes:

${\mathrm{\Δ}}_{\mathrm{off\; set},\mathrm{dl}}=\frac{{\mathrm{\Σ}}_{i=1}^L{\mathrm{Delay}}_i}{L}$

Or Δ_{Offset, dl}=min ({ Delay_i, i=1,2 ... L})

Or Δ_{Offset, dl}=max ({ Delay_i, i=1,2 ... L})

T_{Bechmark, dl}=T₀+Δ_{Offset, dl}

D) target AP interacts with timing base AP, obtains the downlink timing slip T estimated by timing base AP_{Bechmark, dl}；

3) target AP utilizes the downlink timing information T obtained_{Bechmark, dl}And the descending correction amount self configured^DLEstimate final downlink timing；

T_dl=T_{Bechmark, dl}-Δ^DL

4) by T_dlThe downlink timing currently employed with target AP compares, and determines timing adjustment amount；

5) target AP utilizes obtained timing adjustment amount to carry out its downlink timing and/or the adjustment of uplink receiving timing；

6th kind of mode is that timing base AP estimates uplink receiving timing according to the up timing advance with self serviced user and feeds back to target AP, and as shown in Figure 10 a, it specifically comprises the following steps that

Timing base AP obtains user set { Ue_i, i=1,2 ... L}, the service AP of user in this user set be timing base AP and this user gather in user near target AP, wherein L is the sum of described user；

6.1, timing base AP utilizes user to gather the up transmitting timing advance { TA of interior user_i, i=1,2 ... the uplink receiving timing of L} estimation target AP；

6.2, target AP is obtained by timing base AP alternately by information is its uplink receiving estimated timing；

6.3, target AP utilizes the uplink receiving timing and currently used uplink receiving timing estimation timing adjustment amount obtained by timing base AP；

6.4, target AP utilizes obtained timing adjustment amount to carry out its uplink receiving timing and/or the adjustment of downlink timing.

Wherein target AP utilize obtained timing adjustment amount carry out uplink receiving regularly and/or downlink adjustment regularly step particularly as follows:

Postponing the downlink timing of target AP, the time size of delay is timing adjustment amount；

The uplink receiving timing of target AP in advance, time size in advance is timing adjustment amount.

In order to make it easy to understand, refer to Figure 10 b, with a concrete example, foregoing is described in detail below.

Target AP interacts with timing base AP, obtains the uplink receiving timing of target AP side, as shown in 10b, UE in figure_jService AP is target AP, i.e. AP₂, UE_iService AP be timing base AP, i.e. AP₁, concretely comprise the following steps:

1) timing base AP has himself downlink timing information T₀；

2) timing base AP estimates the uplink receiving timing of target AP, and its implementation can be:

A) near the user set { Ue of target AP during timing base AP obtains its user serviced_i, i=1,2 ... L}, L are the sum of described user；

B) the up transmitting timing advance { TA of the user's set described in timing base AP acquisition_i, i=1,2 ... L}；

C) the up transmitting timing advance { TA that timing base AP gathers according to described user_i, i=1,2 ... the uplink receiving timing that L} and downlink timing estimation target AP himself used should use, optional way is:

T_{Bechmark, ul}=T₀-f({TA_i, i=1,2 ... L})

Wherein about { TA_i, i=1,2 ... its form of function f () of L} can be:

$f\left(\right\{{\mathrm{TA}}_i,i=\mathrm{1,2},...L\left\}\right)=\frac{{\mathrm{\Σ}}_{j=1}^L({\mathrm{TA}}_i+\mathrm{OFFSET})}{2L},$

Or

3) target AP obtains the uplink receiving timing T estimated by timing base AP with timing base AP alternately by information_{Bechmark, ul}；

4) target AP utilizes step 3) acquired in uplink receiving timing T_{Bechmark, ul}And its up correction amount configured^ULEstimate the user UE that it is its service_jThe uplink receiving timing used, specific as follows:

T_{Ul, j}=T_{Bechmark, ul}+Δ^UL-lag_j, wherein T_{Ul, j}For user UE_jUplink receiving timing, lag_jIt is target AP to user UE_jDelay；

5) by T_{Bechmark, ul}+Δ^ULThe uplink receiving timing currently employed with target AP compares, and determines timing adjustment amount, utilizes obtained timing adjustment amount to carry out its uplink receiving timing and/or the adjustment of downlink timing.

7th kind of mode is that timing base AP measures estimation timing adjustment amount and feeds back to target AP, and as shown in Figure 11 a, 11b, it specifically comprises the following steps that

All or part of user's collection that target setting AP is serviced is combined into { ue_i, i=1,2 ... L}, wherein L is the sum of described user.

7.1, the user ue in timing base AP obtains user's set_iThe parameter configuration of ascending physical signal signal (such as accidental access signal, SRS or DMRS etc.)；

7.2, timing base AP detects described user by receivingAscending physical signal Signal estimation uplink receiving timing；

7.3, timing base AP is by comparing the timing adjustment amount receiving timing and reception timing estimation target AP of himself serviced user of user's set；

7.4, target AP is obtained by the timing adjustment amount estimated by timing base AP alternately by the information between timing base AP；

7.5, target AP utilizes the timing adjustment amount obtained to carry out uplink receiving timing and/or the adjustment of downlink timing.

Wherein target AP utilize obtained timing adjustment amount carry out uplink receiving regularly and/or downlink adjustment regularly step particularly as follows:

Postponing the downlink timing of target AP, the time size of delay is timing adjustment amount；

The uplink receiving timing of target AP in advance, time size in advance is timing adjustment amount.

8th kind of mode is that target AP measures estimation timing adjustment amount, and as figure 12 a shows, it specifically comprises the following steps that

Timing base AP obtains user set { Ue_i, i=1,2 ... L}, the service AP of user in this user set be timing base AP and this user gather in user near target AP, wherein L is the sum of described user；

8.1, the user Ue in target AP obtains user's set_iThe parameter configuration of ascending physical signal signal (such as accidental access signal, SRS or DMRS etc.)；

8.2, target AP detects described user Ue by receiving_iAscending physical signal signal, estimate the uplink receiving timing that described user gathers；

8.3, the uplink receiving timing of target AP uplink receiving timing with himself serviced user by comparing user's set, estimates the timing adjustment amount of target AP；

8.4, target AP utilizes the timing adjustment amount obtained to carry out uplink receiving timing and/or the adjustment of downlink timing.

Wherein target AP utilize obtained timing adjustment amount carry out uplink receiving regularly and/or downlink adjustment regularly step particularly as follows:

Postponing the downlink timing of target AP, the time size of delay is timing adjustment amount；

The uplink receiving timing of target AP in advance, time size in advance is timing adjustment amount.

In order to make it easy to understand, refer to Figure 12 b, with a concrete example, foregoing is described in detail below.

1) near the user set { Ue of target AP in timing base AP judges community_i, i=1,2 ... L}, L are the sum of described user, and in described set, the service AP of user is timing base AP；

2) the described user of target AP acquisition gathers the interception reference signal (SoundingReferenceSignal of interior each user, or demodulated reference signal (DemodulationReferenceSignal SRS), the configuration information of physical reference signal such as DMRS), target AP can obtain described physical reference signal configuration information alternately by the information between timing base AP；

3) target AP utilize acquired in the configuration information of the physical reference signal such as SRS, DMRS detect described user and gather the upward signal of interior user and arrive the ArrivalTime time of advent of target AP_i(i.e. user u_iUplink receiving timing in target AP), as shown in Figure 12 b (4)；

4) { the ArrivalTime time of advent acquired in the utilization of target AP_i, i=1,2 ... L} and its up correction amount configured^ULEstimate its serviced user UE_jUp transmitting timing T_{Ul, j}；Optional way can be:

T_{Ul, j}=T_{Bechmark, ul}+Δ^UL-lag_j

Wherein T_{Bechmark, ul}=f ({ ArrivalTime_i, i=1,2 ... L})

Optionally, about { ArrivalTime_i, i=1,2 ... its form of function f () of L} can be

$f\left(\right\{{\mathrm{ArrivalTime}}_i,i=\mathrm{1,2},...L\left\}\right)=\frac{{\mathrm{\Σ}}_{j=1}^L\mathrm{Arrival}{\mathrm{Time}}_j}{L}$

Or

f({ArrivalTime_i, i=1,2 ... L})=min ({ ArrivalTime_i, i=1,2 ... L})

Or

f({ArrivalTime_i, i=1,2 ... L})=max ({ ArrivalTime_i, i=1,2 ... L})

5) by T_{Bechmark, ul}+Δ^ULThe uplink receiving timing currently employed with target AP compares, and determines timing adjustment amount, utilizes obtained timing adjustment amount to carry out its uplink receiving timing and/or the adjustment of downlink timing.

9th kind of mode is that target AP is timed adjustment with timing base AP according to the uplink receiving time difference of user, and as depicted in fig. 13 a, it specifically comprises the following steps that

Set the user's collection near target AP and be combined into { UE_i, i=1,2 ... L}, wherein L is the sum of described user.

9.1, target AP and timing base AP obtain described user respectively and gather interior user UE_iThe parameter configuration of ascending physical signal signal (such as accidental access signal, SRS or DMRS etc.)；

9.2 targets AP are according to described user UE_iAscending physical signal Signal estimation user UE_iUplink receiving timing in target AP；

9.3 timing base AP are according to described user UE_iAscending physical signal Signal estimation user UE_iUplink receiving timing at timing base AP；

9.4, user UE is calculated_iUplink receiving timing and user UE in target AP_iUplink receiving time difference Δ between the uplink receiving timing of timing base AP_i, all with carrying out above step per family in so user being gathered, i.e. can get the uplink receiving of user's set time difference { Δ regularly_i}；

9.5, the time difference { Δ of the uplink receiving timing that described user gathers is utilized_iDetermine the timing adjustment amount of target AP；

9.6, target AP utilizes the timing adjustment amount of target AP to carry out uplink receiving timing and/or the adjustment of downlink timing.

Wherein target AP utilize the timing adjustment amount of target AP carry out uplink receiving timing and/or downlink timing adjustment step particularly as follows:

Postponing the downlink timing of target AP, the time size of delay is timing adjustment amount；

The uplink receiving timing of target AP in advance, time size in advance is timing adjustment amount.

In order to make it easy to understand, refer to Figure 13 b and Figure 13 c, with a concrete example, foregoing is described in detail below.

Wherein target AP correspondence LPN, timing base AP correspondence Macro (macro station).The downlink frame timing adjustment of LPN is described below.

To be positioned near LPN as a example by a range of A: Macro and LPN arrives UE_ATime difference be TUM-TUL.This value can utilize UE_AThe time difference of the upward signal/channel arriving Macro and LPN obtains LA₁-LA₂.LPN and Macro is made to arrive UE_AThe method preferably alignd of time be: postponing the LPN frame descending time started is LA₁-LA₂.For other UE_MThe descending time started length of delay LM of the LPN frame to its relative ideal can also be obtained₁-LM₂.Therefore can obtain LPN needs the time range adjusted between minima and maximum: min (LM₁-LM₂)～max (LM₁-LM₂), M=1,2 ....

In order to contain the timing adjustment demand of a range of UE near LPN, the maximum max (LM of above-mentioned timing adjustment can be chosen₁-LM₂).Certain delay spread value T is had for certain environment_ds, this value can be obtained by empirical value or measurement.It is hereby achieved that " max (LM₁-LM₂)-min(LM₁-LM₂)+T_ds≤ CP ", wherein T_dsThe delay spread being previously obtained for Macro or pre-estimate, CP is the time value that Macro obtains according to the CP length used by OFDM (OrthogonalFrequencyDivisionMultiplexing, OFDM) symbol.

The border UE that LPN covers can be according to min (LM₁-LM₂) determine, this value meets " min (LM₁-LM₂)≥max(LM₁-LM₂)+T_ds-CP”

According to described above, for meeting at scope min (LM₁-LM₂)～max (LM₁-LM₂UE within) as the UE of potential access LPN, can carry out the selection of UE leg gusset further according to the measurement result of downstream signal (such as downlink reference signal) or upward signal (such as uplink reference signals).

The process of LPN downlink frame timing adjustment is illustrated below:

According to described above, with UE in Figure 13 b_BAnd UE_CAs a example by.Assume UE_BDistance Macro compares UE_CDistance Macro wants near.First UE_BAnd UE_CCarry out with Macro respectively or keep down-going synchronous.The initial LPN frame time started alignd with the Macro frame time started.Macro according to Macro and LPN receive from UE_BAnd UE_CThe time of advent difference be respectively calculated.It will be seen that the near UE of distance Macro from Figure 13 b_BThe UE that corresponding framing control is more remote than distance Macro_CThe value of framing control want big.According to described above, it is assumed that UE_BThe adjusted value of corresponding LPNDL frame is the adjusted value calculating maximum, then, on the basis of this value, calculate UE to the Macro allowed and the minima to the LPN difference time of advent, this minima min (LM₁-LM₂) need to meet min (LM₁-LM₂)≥max(LM₁-LM₂)+T_ds-CP, in sum, according to above-mentioned illustration, can obtain the LPN downlink frame timing adjustment that the embodiment of the present invention provides realizes flow process as described in Figure 13 c, and details are as follows:

1, UE Yu Macro carries out or keeps down-going synchronous；

2, UE sends ULRACH channel or UL pilot signal or UL controls channel or UL data channel；

3, Macro and LPN receives the up channel from same UE or signal respectively；

4, the up channel of the same UE that Macro and LPN is received by Macro or signal carry out the comparison of the time of advent, and its difference is LM₁-LM₂, wherein LM₁Represent that UE arrives the time of Macro, LM₂Represent that UE arrives the time of LPN；

5, the Macro LM to different UE₁-LM₂Compare；

6, Macro takes the maximum of comparative result or the minima higher than certain thresholding or the maximum less than certain thresholding as max (LM₁-LM₂)；

7, Macro calculates UE and arrives Macro and difference LM of arrival LPN time₁-LM₂Need the minima min (LM met₁-LM₂)=max (LM₁-LM₂)+T_ds-CP。

In the present embodiment, on the basis of the AP timing bigger by overlay area, adjust the up-downgoing timing of the less AP in overlay area, it is achieved in the synchronization at user side multiple AP downstream signal, the uplink signal synchronization of the user with different service AP close from geographical position is received at AP side joint, such that it is able to the performance of the related physical channels such as the primary synchronization channel improved in heterogeneous network, auxiliary synchronization channel, it is simple to the realization of the enhancement techniques such as CoMP.

In embodiments of the present invention, can be according to the different scenes of heterogeneous network, from above-mentioned 9 kinds of timing controlled modes, choose a kind of uplink receiving timing to target AP and downlink timing is adjusted, certainly, during to the adjustment of the timing of the uplink receiving of target AP and downlink timing, selected timing controlled mode can be identical, it is also possible to different.In above-mentioned 9 kinds of timing controlled modes, first kind of way is only used for descending timing controlled, and the second way is only used for up timing controlled, and other control modes may be incorporated for adjusting the uplink receiving timing of target AP and downlink timing.

In embodiments of the present invention, according to timing controlled mode of operation, the time control method of this heterogeneous network can be divided into initial timing control, periodically timing controlled and event-triggered timing controlled, as shown in figure 14, when having newly increased target AP in heterogeneous network, the time control method of this heterogeneous network is summarized as follows:

Initially enter initial timing and control mode of operation, i.e. target AP added to heterogeneous network is powered on, in target AP initialization procedure, timing base AP is determined for target AP, target AP, with timing base AP as timing base, uses the timing controlled mode preset to carry out uplink receiving timing and/or the adjustment of downlink timing.

After initial timing completes, after i.e. target AP powers on and has initialized, according to the set clock cycle, within the clock cycle, downlink timing after target AP uses initial timing communicates with its serviced user with uplink receiving timing, when clock time-out, target AP uses timing base AP to be timing base, the timing controlled mode preset is used to carry out uplink receiving timing and/or the adjustment of downlink timing, and after timing controlled completes, target AP uses the downlink timing after updating to communicate with its serviced user with uplink receiving timing.

After initial timing completes, persistently detection is used for triggering whether time-controlled trigger event occurs, when detecting for triggering the generation of time-controlled trigger event, entry event trigger-type timing controlled mode of operation, i.e. target AP timing base AP is timing base, the timing controlled mode preset is used to carry out uplink receiving timing and/or the adjustment of downlink timing, and after event-triggered timing completes, downlink timing after target AP uses event-triggered timing communicates with its serviced user with uplink receiving timing, and reenter periodically timing controlled mode of operation.Before and after wherein event triggers, the cycle in periodicity timing controlled mode of operation can be identical or different.

Hereinafter the time control method under each timing controlled mode of operation is described in detail.

Time control method under initial timing control mode of operation:

What Figure 15 showed the initial timing control method of the heterogeneous network that the embodiment of the present invention provides realizes flow process, and details are as follows:

S201, powers on to target AP added to heterogeneous network.

S202, in target AP initialization procedure, determines timing base AP for target AP, and target AP, with timing base AP as timing base, carries out uplink receiving timing and/or the adjustment of downlink timing.

The present embodiment can realize to be newly added to heterogeneous network and also do not carried out initialized target AP carry out uplink receiving timing and/or downlink timing adjustment.

The periodically time control method under timing controlled mode of operation:

What Figure 16 showed the periodicity time control method of the heterogeneous network that another embodiment of the present invention provides realizes flow process, and the application scenarios of the method is to keep with the timing of frequency air interface synchronization mode, and details are as follows:

S301, after target AP powers on and initialized, according to the set clock cycle, within the clock cycle, target AP uses current downlink timing to communicate with its serviced user with uplink receiving timing.

S302, according to the set clock cycle, when clock time-out, target AP uses timing base AP to be timing base, carries out uplink receiving timing and/or the adjustment of downlink timing.

The present embodiment is already powered in target AP and after having initialized, and can keep the timing offset of target AP.

Time control method under event-triggered timing controlled mode of operation:

What Figure 17 showed the event-triggered time control method of the heterogeneous network that another embodiment of the present invention provides realizes flow process, and details are as follows:

S401, detection is used for triggering whether time-controlled trigger event occurs.

Wherein include but not limited to for triggering time-controlled trigger event that the transmitting power of target AP and timing base AP changes, radio frequency parameter change etc. affects target AP and the event of timing base AP overlay area, also includes the event of periodically time-controlled cyclomorphosis quasi-periodic timing controlled running parameter change.

S402, when detecting for triggering the generation of time-controlled trigger event, judges whether to need to redefine timing base AP according to current event.If the power change etc. of launching that current event is timing base AP affects the event of timing base AP overlay area, then target AP redefines timing base AP, and carries out uplink receiving timing and/or the adjustment of downlink timing；On the basis of the timing of original timing base AP, otherwise carry out uplink receiving timing and/or the adjustment of downlink timing.

By event-triggered time control pattern, it is achieved launch the reacquisition of timing offset between target AP and timing base AP in the case of the systematic parameter generation great changes such as power and periodicity timing controlled running parameter configuration variation at AP.In embodiments of the present invention, whether affect target AP according to the information interaction approach between target AP and timing base AP and timing controlled mode and it service being in communication with each other between user, can be divided into:

Mode one:

It is mutual that target AP is timed information by the way of using wireless connections on certain frequency spectrum resource with timing base AP, and the frequency spectrum resource that described wireless connections are used is identical with the frequency spectrum resource that its serviced communicating between users is used with target AP；Or target AP needs to receive downstream signal or target AP from timing base AP on described frequency spectrum resource to be needed on described frequency spectrum resource to timing base AP up transmitting signal；

Certain impact is there is in which on the communication between target and user, i.e. control the time at initial timing, periodically in timing controlled time and event-triggered timing controlled time, target AP is by utilizing the configuration being its serviced user or stopping scheduling user, user is made to interrupt the up and/or downlink communication with target AP within the described time period, to be timed control.

Mode two:

Connection between target AP and timing base AP can be the radio connection outside alien frequencies band, the frequency spectrum resource that i.e. between target AP from user, mutual timing information the uses frequency spectrum resource used that communicates with between target AP with timing base AP is different, or the connection between target AP and timing base AP can be wired connection mode.

In this fashion, target AP can not interrupt the communication between its serviced user while being timed control.As in fig. 14, still can service AP (i.e. target AP) in the periodicity timing controlled time with it with user in the timing controlled time of event-triggered and keep communicating.

Another embodiment of the present invention additionally provides the time control method of the heterogeneous network of a kind of timing base AP side, and the method includes:

Timing base access point AP provides timing base for target AP, so that described target AP is with described timing base AP as timing base, carry out uplink receiving timing and/or the adjustment of downlink timing, wherein, described timing base AP is the described target AP footprint size according to the AP searched, launch power, and target AP receive the signal of AP that searches receive in power at least one determine as described in the AP of timing base of target AP, or for described target AP according to the information whether in the AP searched with described target AP determine as described in the AP of timing base of target AP, described target AP is the AP needing in heterogeneous network to be timed.

One of ordinary skill in the art will appreciate that, realize all or part of step in above-described embodiment method to can be by program and complete to instruct relevant hardware, described program can be in being stored in a computer read/write memory medium, described storage medium, such as ROM/RAM, disk, CD etc..

Figure 18 shows the structure of the access point that the embodiment of the present invention provides, and for convenience of description, illustrate only the part relevant to the embodiment of the present invention.

This access point is target AP needing in heterogeneous network to be timed, and determines unit 1 and timing adjustment module 2 including timing base AP.Wherein:

Timing base AP determines that unit 1 determines the timing base AP of described target AP.Wherein the timing base AP of target AP includes:

At least one in the reception power of the signal that footprint size, transmitting power and target AP according to the AP searched receives the AP searched determines the timing base AP of described target AP, or determines the timing base AP of described target AP according to the information whether in the AP searched with described target AP.

Timing adjustment module 2, with timing base AP as timing base, carries out uplink receiving timing and/or the adjustment of downlink timing to target AP.

In an alternative embodiment of the invention, timing base AP determines that unit 1 includes that timing base AP configures module 111.This timing base AP configuration module 111 determines the timing base AP of target AP according to the configuration information of control station.Wherein the AP that control station can search for according to target AP footprint size, launch power and target AP receive the AP that can search for signal receive in power at least one determine the timing base AP of described target AP, or the information whether in the AP that can search for according to target AP with described target AP determines the timing base AP of described target AP.

In an alternative embodiment of the invention, referring to Figure 19, this timing base AP determines that unit 1 includes that AP search module the 121, first power acquisition module 122, first timing base AP determines module 123.Wherein:

Oneth AP search module 121 makes target AP search for AP on the frequency spectrum resource specified, setting search to AP collection be combined into { AP_i, i=1,2 ... N}, wherein N is the AP number that target AP searches, N >=1.

First power acquisition module 122 reads each AP searched_iSystem information, from described system information, obtain described each AP_iFor the transmitting power of the reference signal that path loss is estimated, obtain launching power setAnd measure the reception power of each reference signal, obtain receiving power set { RSRP_i, i=1,2 ... N}.

First timing base AP determines that module 123 is according to described transmitting power setWith described reception power set { RSRP_i, i=1,2 ... N} estimates the AP belonging to described target AP, and the AP belonging to described target AP is defined as the timing base AP of described target AP.Wherein timing base AP determines that module 123 is according to described transmitting power setWith described reception power set { RSRP_i, i=1,2 ... N} estimates AP belonging to described target AP, and the AP belonging to described target AP is defined as described target AP timing base AP detailed process as above, do not repeat them here.

In an alternative embodiment of the invention, referring to Figure 20, this timing base AP determines that unit 1 includes that the 2nd AP search module 131, connection establishment module the 132, second timing base AP determine module 133.Wherein:

2nd AP search module 131 makes described target AP search for AP on the frequency spectrum resource specified, setting search to AP collection be combined into { AP_i, i=1,2 ... N}, wherein N is the AP number that target AP searches, N >=1.

Connection establishment module 132 sets up target AP and the connection of each AP searched to carry out information mutual.

Second timing base AP determines that module 133 is mutual according to the information with connection establishment module 132, and the AP of the information in the AP that will search with target AP is defined as the timing base AP of target AP.

In an alternative embodiment of the invention, referring to Figure 21, this timing base AP determines that unit 1 includes that the 3rd AP search module 141, cell coverage information processing module the 142, second power acquisition module 143 and the 3rd timing base AP determine module 144.Wherein:

3rd AP search module 141 makes target AP search for AP on the frequency spectrum resource specified, setting search to AP collection be combined into { AP_i, i=1,2 ... N}, wherein N is the AP number that target AP searches, N >=1.

Coverage information processing module 142 makes target AP read the system information of each AP searched, the covering size information of each AP is obtained from described system information, and according to the covering size information of described each AP, the several AP selecting coverage maximum from the AP searched form AP subset { AP_index(j), j=1,2 ... M, M≤N}.

Second power acquisition module 143 makes the reference signal for path loss estimation of target AP each AP to searching measure, and estimates the reception power RSRP of described reference signal_i。

3rd timing base AP determines that module 144 is according to AP subset { AP_index(j), j=1,2 ... the reception power RSRP of each AP in M, M≤N}_iSize, by described AP subset { AP_index(j), j=1,2 ... RSRP in M, M≤N}_iThe AP of value maximum is defined as the timing base AP of target AP.

In an alternative embodiment of the invention, referring to Figure 22, this timing base AP determines that unit 1 includes that the 4th AP search module the 151, the 3rd power acquisition module the 152, the 4th timing base AP determines module 153.Wherein:

4th AP search module 151 makes described target AP search for AP on the frequency spectrum resource specified, setting search to AP collection be combined into { AP_i, i=1,2 ... N}, wherein N is the AP number that described target AP searches, N >=1；

3rd power acquisition module 152 makes described target AP read each AP searched_iSystem information, from described system information, obtain described each AP_iFor the transmitting power of the reference signal that path loss is estimated, obtain launching power set

4th timing base AP determines that module 153 makes described target AP by described middle transmitting power setThe AP corresponding to maximum be set to the timing base AP of described target AP.

In an alternative embodiment of the invention, referring to Figure 18, this timing adjustment module 2 includes downlink reception timing acquisition module 211 and downlink timing adjustment module 212.Wherein:

Target AP is carried out synchronize with the downstream signal of timing base AP by downlink reception timing acquisition module 211, it is thus achieved that the downstream signal of timing base AP is in the downlink reception timing of target AP.

Downlink timing adjustment module 212 uses the descending correction amount of target AP^DLAdjust downlink reception timing acquisition module 211 obtain downlink reception timing, and will adjust after the downlink that downlink reception timing determination is target AP downstream signal timing.

In an alternative embodiment of the invention, referring to Figure 23, this timing adjustment module 2 includes up transmitting timing acquisition module 221, uplink receiving timing adjustment module 222 and up transmitting timing determination block 223.Wherein:

Up transmitting timing acquisition module 221 makes target AP carry out uplink synchronous to timing base AP transmitting uplink synchronizing signals, obtains, according to the feedback of timing base AP, the up transmitting timing that target AP synchronizes at timing base AP.

Uplink receiving timing adjustment module 222 uses the up correction amount of target AP^ULUp transmitting timing to being obtained is adjusted, the uplink receiving that up transmitting timing determination the is target AP upward signal timing after this being adjusted.

The uplink receiving timing of target AP that up transmitting timing determination block 223 determines according to uplink receiving timing adjustment module 222, the propagation delay time between target AP and its serviced user determine the up transmitting timing of described user.

In an alternative embodiment of the invention, referring to Figure 24, this timing adjustment module 2 includes first information interactive module 231 and the first timing adjustment module 232.Wherein:

First information interactive module 231 makes described target AP obtain the timing adjustment amount of described target AP that described timing base AP determines alternately by the information between described timing base AP.

The timing adjustment amount that first timing adjustment module 232 makes described target AP utilize described first information interactive module to obtain carries out uplink receiving timing and/or the adjustment of downlink timing.

The determination mode of the timing adjustment amount of wherein said target AP includes:

Described timing base AP obtains user set { Ue_i, i=1,2 ... L}, each user Ue in described user set_iService AP be timing base AP, and described user set in each user Ue_iNear target AP, the sum of user during wherein L is described user set；

User Ue in described user set_iCarry out down-going synchronous with timing base AP, obtain the downlink reception timing from timing base AP；

User Ue in described user set_iCarry out down-going synchronous with target AP, obtain the downlink reception timing from target AP；

User Ue in described user set_iEstimate the described downlink reception timing from timing base AP and from the timing time difference between the downlink reception timing of target AP, and by described timing time difference uplink feedback to timing base AP；

Described timing base AP utilize user to gather in the timing adjustment amount of described timing TDOA estimation target AP fed back of user.

Wherein the first timing adjustment module 232 make target AP utilize obtained timing adjustment amount carry out uplink receiving regularly and/or downlink adjustment regularly particularly as follows:

Postponing the downlink timing of target AP, the time size of delay is timing adjustment amount；

The uplink receiving timing of target AP in advance, time size in advance is timing adjustment amount.

In an alternative embodiment of the invention, referring to Figure 25, this timing adjustment module 2 includes the first timing adjustment amount acquisition module 241 and the second timing adjustment module 242.Wherein:

First timing adjustment amount acquisition module 241 makes described target AP gather { ue according to user_i, i=1,2 ... the transmitting timing adjustment amount of timing TDOA estimation target AP that the user in L} is fed back, described user gathers { ue_i, i=1,2 ... the service AP of each user in L} is target AP, and wherein L is the sum of described user；

Second timing adjustment module 242 makes described target AP utilize the timing adjustment amount of launching obtained to carry out uplink receiving timing and/or the adjustment of downlink timing；

Wherein, the feedback system of the described timing time difference includes:

User ue in described user set_iCarry out down-going synchronous with described timing base AP, obtain the downlink reception timing from timing base AP；

User ue in described user set_iCarry out down-going synchronous with described target AP, obtain the downlink reception timing from target AP；

User ue in described user set_iEstimate the described downlink reception timing from timing base AP and from the timing time difference between the downlink reception timing of target AP, and by described timing time difference uplink feedback to target AP.

In an alternative embodiment of the invention, referring to Figure 26, this timing adjustment module 2 also includes the second information interactive module the 252, second timing adjustment amount acquisition module 252 and the 3rd timing adjustment module 253.Wherein:

Second information interactive module 251 makes described target AP obtain, by the information between described timing base AP, the downlink timing that target AP of described timing base AP estimation is estimated alternately；

The downlink timing estimation timing adjustment amount that downlink timing that second timing adjustment amount acquisition module 252 makes described target AP obtain according to described second information interactive module is the most currently used with target AP；

3rd timing adjustment module 253 makes target AP utilize the timing adjustment amount obtained to carry out its downlink timing and/or the adjustment of uplink receiving timing；

Wherein, the estimation mode of the downlink timing of described target AP includes:

Described timing base AP obtains user set { Ue_i, i=1,2 ... L}, each user Ue in described user set_iService AP be timing base AP, and described user set in each user Ue_iNear target AP, the sum of user during wherein L is described user set；

Described timing base AP is by the propagation delay time between up transmitting timing advance estimation timing base AP and its serviced user of its serviced user；

Described timing base AP utilize self downlink timing and described user gather interior user propagation delay time estimate target AP downlink timing.

In an alternative embodiment of the invention, referring to Figure 27, this timing adjustment module 2 includes the 3rd information interactive module the 261, the 3rd timing adjustment amount acquisition module 262 and the 4th timing adjustment module 263.Wherein:

3rd information interactive module 261 makes described target AP obtain the uplink receiving timing of target AP that described timing base AP estimates alternately by the information between described timing base AP；

3rd timing adjustment amount acquisition module 262 makes the uplink receiving timing uplink receiving timing estimation timing adjustment amount the most currently used with target AP that described target AP obtains according to described 3rd information interactive module；

4th timing adjustment module 263 makes described target AP utilize described timing adjustment amount to carry out uplink receiving timing and/or the adjustment of downlink timing；

Wherein, the estimation mode of the uplink receiving timing of described target AP includes:

Described timing base AP obtains user set { Ue_i, i=1,2 ... L}, each user Ue in described user set_iService AP be timing base AP, and described user set in each user Ue_iNear target AP, the sum of user during wherein L is described user set；

Described timing base AP utilizes the up transmitting timing advance { TA that described user gathers_i, i=1,2 ... the uplink receiving timing of L} estimation target AP.

In an alternative embodiment of the invention, referring to Figure 28, this timing adjustment module 2 includes the 4th information interactive module 271 and the 5th timing adjustment module 272.Wherein:

4th information interactive module 271 makes described target AP obtain the timing adjustment amount of target AP that described timing base AP estimates alternately by the information between described timing base AP；

5th timing adjustment module 272 makes described target AP carry out uplink receiving timing and/or the adjustment of downlink timing according to described timing adjustment amount；

Wherein, the estimation mode of the timing adjustment amount of described target AP includes:

Obtain user set { ue_i, i=1,2 ... L}, the service AP of each user in described user set is target AP, and wherein L is the sum of described user；

Described timing base AP obtains the user ue in described user set_iAscending physical signal signal；

Described timing base AP is by detecting described user ue_iAscending physical signal Signal estimation uplink receiving timing；

The reception timing that user is gathered by described timing base AP compares with the reception timing of himself serviced user, estimates the timing adjustment amount of target AP.

In an alternative embodiment of the invention, referring to Figure 29, this timing adjustment module 2 includes the first parameter configuration acquisition module the 281, first uplink receiving timing estimate module the 282, the 5th timing adjustment amount acquisition module 283 and the 6th timing adjustment module 284.Wherein

First parameter configuration acquisition module 281 makes described target AP obtain user set { Ue_i, i=1,2 ... the user Ue in L}_iAscending physical signal signal, described user gathers { Ue_i, i=1,2 ... each user Ue in L}_iService AP be timing base AP, and described user set in each user Ue_iClose target AP, the sum of user during wherein L is described user set；

First uplink receiving timing estimate module 282 makes described target AP by detecting described user Ue_iAscending physical signal signal, estimate described user gather { Ue_i, i=1,2 ... the uplink receiving timing of L}；

5th timing adjustment amount acquisition module 283 makes uplink receiving timing that described user gathers by described target AP compare with the uplink receiving timing of himself serviced user, the timing adjustment amount of estimation target AP；

6th timing adjustment module 284 makes described target AP carry out uplink receiving timing and/or the adjustment of downlink timing according to described timing adjustment amount.

In an alternative embodiment of the invention, referring to Figure 30, this timing adjustment module 2 includes second parameter configuration acquisition module the 291, second uplink receiving timing estimation module the 292, the 5th information interactive module 293, uplink receiving time difference computing module the 294, the 6th timing adjustment amount acquisition module 295 and the 7th timing adjustment module 296.Wherein:

Second parameter configuration acquisition module 291 makes described target AP obtain user set { UE_i, i=1,2 ... user UE in L}_iAscending physical signal signal, described user collection be combined into { UE_i, i=1,2 ... the user UE in L}_iFor the user near described target AP, wherein L is the sum of described user；

Second uplink receiving timing estimation module 292 makes the described user UE that described target AP obtains according to described second parameter configuration acquisition module_iAscending physical signal Signal estimation described in user UE_iUplink receiving timing in target AP；

5th information interactive module 293 makes described target AP obtain, from described timing base AP, the user UE that described timing base AP estimates_iAt the uplink receiving timing of timing base AP, wherein said user UE_iEstimation mode in the uplink receiving timing of timing base AP includes: described timing base AP obtains described user and gathers interior user UE_iAscending physical signal signal, described timing base AP is according to described user UE_iAscending physical signal Signal estimation user UE_iUplink receiving timing at timing base AP；

Uplink receiving time difference computing module 294 makes described target AP obtain user UE_iUplink receiving timing and user UE in target AP_iUplink receiving time difference Δ between the uplink receiving timing of timing base AP_i, obtain described user set { UE_i, i=1,2 ... the time difference { Δ of the uplink receiving timing of L}_i}；

6th timing adjustment amount acquisition module 295 makes the time difference { Δ of the uplink receiving timing that described target AP utilizes described user to gather_iDetermine the timing adjustment amount of target AP；

7th timing adjustment module 296 makes described target AP utilize the timing adjustment amount of target AP to carry out uplink receiving timing and/or the adjustment of downlink timing.

It should be noted that, the unit of the access point in the present embodiment and the implementation of module and interaction can also be with reference to the descriptions in correlation method embodiment.

nullAnother embodiment of the present invention additionally provides a kind of access point (i.e. timing base AP) providing timing base for target AP，This timing base AP is for providing timing base for target AP，So that described target AP is with described timing base AP as timing base，Carry out uplink receiving timing and/or the adjustment of downlink timing，Wherein，Described timing base AP is the described target AP footprint size according to the AP searched、Launch power、And target AP receive the signal of AP that searches receive in power at least one determine as described in the AP of timing base of target AP，Or for described target AP according to the information whether in the AP searched with described target AP determine as described in the AP of timing base of target AP，Described target AP is the AP needing in heterogeneous network to be timed.

In embodiments of the present invention, on the basis of the AP timing bigger by overlay area, adjust the up-downgoing timing of the less AP in overlay area, it is achieved in the synchronization at user side multiple AP downstream signal, the uplink signal synchronization of the user with different service AP close from geographical position is received at AP side joint, such that it is able to the performance of the related physical channels such as the primary synchronization channel improved in heterogeneous network, auxiliary synchronization channel, it is simple to the realization of the enhancement techniques such as CoMP.By target AP is carried out initial timing control, it is possible to achieve to be newly added to heterogeneous network and also do not carried out initialized target AP carry out uplink receiving timing and/or downlink timing adjustment.By target AP being carried out periodically timing controlled, after target AP powers on and initialized, the timing offset of target AP can be kept.By target AP is carried out event-triggered timing controlled, it is achieved launch the reacquisition of timing offset between target AP and timing base AP in the case of the systematic parameter generation great changes such as power and periodicity timing controlled running parameter configuration variation at AP.When target AP and the frequency spectrum resource that its serviced communicating between users is used communicate with between target AP with timing base AP the frequency spectrum resource used identical time, if target AP need to receive on described frequency spectrum resource from the downstream signal of timing base AP or target AP need on described frequency spectrum resource to timing base AP up transmitting signal time, within the initial timing control time, periodically in the timing controlled time and in the event-triggered timing controlled time, target AP is by utilizing the configuration being its serviced user or stopping scheduling user, user is made to interrupt the up and/or downlink communication with target AP within the described time period, to be timed control.Between target AP from user mutual timing information use frequency spectrum resource communicate with between target AP with timing base AP use frequency spectrum resource different, or when the connection between target AP and timing base AP is wired connection mode, within the initial timing control time, periodically in the timing controlled time and in the event-triggered timing controlled time, target AP keeps the communication between its serviced user.

The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all any amendment, equivalent and improvement etc. made within the spirit and principles in the present invention, should be included within the scope of the present invention.

Claims (39)

1. the time control method of a heterogeneous network, it is characterised in that described method includes:

Determine the timing base AP of target access AP in heterogeneous network, described target AP is the AP needing to be timed, the timing base AP of wherein said target AP determined in heterogeneous network includes: at least one in the reception power of the signal receiving the AP searched according to footprint size, transmitting power and target AP of the AP searched determines the timing base AP of described target AP, including: the timing base AP of described target AP is determined according to transmitting power and the reception power of the AP searched；Or the timing base AP of described target AP is determined according to the information whether in the AP searched with described target AP；

Described target AP, with timing base AP as timing base, carries out uplink receiving timing and/or the adjustment of downlink timing；

Described method also includes:

When detecting for triggering the generation of time-controlled trigger event, judge whether to need to redefine timing base AP according to described trigger event, if, then redefine the timing base AP of target AP, and with the timing base AP that redefines as timing base, carrying out uplink receiving timing and/or the adjustment of downlink timing, the described transmitting power change including target AP and timing base AP for triggering time-controlled trigger event, radio frequency parameter changes.

2. the method for claim 1, it is characterised in that the timing base AP of described target AP determined in heterogeneous network specifically includes:

Configuration information according to control station determines the timing base AP of target AP, the footprint size of the AP that described control station can search for according to target AP, launch power and target AP receive the AP that can search for signal receive in power at least one determine the timing base AP of described target AP, or the information whether in the AP that can search for according to target AP with described target AP determines the timing base AP of described target AP.

3. the method for claim 1, it is characterized in that, AP around described search target AP, at least one in the reception power of the signal receiving the AP searched according to footprint size, transmitting power and target AP of the AP searched determines that the timing base AP of described target AP includes:

Described target AP searches for AP on the frequency spectrum resource specified, setting search to AP collection be combined into { AP_i, i=1,2 ... N}, wherein N is the AP number that described target AP searches, N >=1；

Described target AP reads each AP searched_iSystem information, from described system information, obtain described each AP_iFor the transmitting power of the reference signal that path loss is estimated, obtain launching power setAnd measure the reception power of each reference signal, obtain receiving power set { RSRP_i, i=1,2 ... N}；

Described target AP is according to described transmitting power setWith described reception power set { RSRP_i, i=1,2 ... N} estimates the AP belonging to described target AP, and the AP belonging to described target AP is defined as the timing base AP of described target AP.

4. method as claimed in claim 3, it is characterised in that described target AP is according to described transmitting power setWith described reception power set { RSRP_i, i=1,2 ... N} estimates the AP belonging to described target AP, and the timing base AP that the AP belonging to described target AP is defined as described target AP includes:

A, to described reception power set { RSRP_i, i=1,2 ... all reception power in N} are ranked up the most successively, obtain { RSRP_index(k), k=1,2 ... N, index (k) ∈ [1,2 ... N], wherein RSRP_index(1)≥RSRP_index(2)≥…≥RSRP_index(N)；

B, to described transmitting power setIn transmitting power be ranked up the most successively, obtaining maximum therein is P_max；

C, setting m=1；

If DMeet following condition:Then AP_index(m)Being the timing base AP of described target AP, otherwise, after m=m+1, return step D, wherein Δ is a predefined threshold value.

5. the method for claim 1, it is characterised in that the AP around described search target AP, determines that according to the information whether in the AP searched with described target AP the timing base AP of described target AP includes:

A, described target AP search for AP on the frequency spectrum resource specified, setting search to AP collection be combined into { AP_i, i=1,2 ... N}, wherein N is the AP number that target AP searches, N >=1；

B, setting i=1；

C, described target AP and AP_iSet up and connect；

D, described target AP and described AP_iThe information of carrying out is mutual, if described AP_iSide has the information of described target AP, then by described AP_iIt is defined as the timing base AP of described target AP, after otherwise i=i+1 is set, returns step C.

6. the method for claim 1, it is characterized in that, AP around described search target AP, at least one in the reception power of the signal receiving the AP searched according to footprint size, transmitting power and target AP of the AP searched determines that the timing base AP of described target AP includes:

Described target AP searches for AP on the frequency spectrum resource specified, setting search to AP collection be combined into { AP_i, i=1,2 ... N}, wherein N is the AP number that described target AP searches, N >=1；

Described target AP reads the system information of each AP searched, and obtains the covering size information of each AP from described system information；

The reference signal for path loss estimation of described target AP each AP to searching measures, and estimates the reception power RSRP of described reference signal_i；

According to the covering size information of described each AP, the several AP selecting coverage maximum from the AP searched form AP subset { AP_index(j), j=1,2 ... ,≤N}；

According to AP subset { AP_index(j), j=1,2 ... the reception power RSRP of each AP in M, M≤N}_iSize, by described AP subset { AP_index(j), j=1,2 ... RSRP in M, M≤N}_iThe AP of value maximum is defined as the timing base AP of target AP.

7. the method for claim 1, it is characterized in that, AP around described search target AP, at least one in the reception power of the signal receiving the AP searched according to footprint size, transmitting power and target AP of the AP searched determines that the timing base AP of described target AP includes:

Described target AP searches for AP on the frequency spectrum resource specified, setting search to AP collection be combined into { AP_i, i=1,2 ... N}, wherein N is the AP number that described target AP searches, N >=1；

Described target AP reads each AP searched_iSystem information, from described system information, obtain described each AP_iFor the transmitting power of the reference signal that path loss is estimated, obtain launching power set

Described target AP is by described transmitting power setThe AP corresponding to maximum be set to the timing base AP of described target AP.

8. the method for claim 1, it is characterised in that described target AP is with timing base AP as timing base, and the adjustment carrying out downlink timing includes:

Described target AP carries out synchronize with the downstream signal of described timing base AP, it is thus achieved that the downstream signal of timing base AP is in the downlink reception timing of target AP；

Described target AP uses the descending correction amount of target AP^DLAdjust the downlink reception timing obtained, the downlink that downlink reception timing determination the is target AP downstream signal timing after adjusting.

9. the method for claim 1, it is characterised in that described target AP, with timing base AP as timing base, carries out uplink receiving timing and includes:

Described target AP is launched uplink synchronizing signals to timing base AP and is carried out uplink synchronous, and target AP obtains its up transmitting timing synchronized at timing base AP according to the feedback of timing base AP；

Described target AP uses the up correction amount of target AP^ULUp transmitting timing to being obtained is adjusted, the uplink receiving that up transmitting timing determination the is target AP upward signal timing after adjusting；

The propagation delay time between uplink receiving timing and target AP and its serviced user according to target AP determines the up transmitting timing of described user.

10. the method for claim 1, it is characterised in that described target AP is with timing base AP as timing base, and the adjustment carrying out uplink receiving timing and/or downlink timing includes:

Described target AP obtains the timing adjustment amount of described target AP that described timing base AP determines alternately by the information between timing base AP；

Described target AP utilizes described timing adjustment amount to carry out uplink receiving timing and/or the adjustment of downlink timing；

Wherein, the determination mode of the timing adjustment amount of described target AP includes:

Described timing base AP obtains user set { Ue_i, i=1,2 ... L}, each user Ue in described user set_iService AP be timing base AP, and described user set in each user Ue_iNear target AP, the sum of user during wherein L is described user set；

User Ue in described user set_iCarry out down-going synchronous with timing base AP, obtain the downlink reception timing from timing base AP；

User Ue in described user set_iCarry out down-going synchronous with target AP, obtain the downlink reception timing from target AP；

User Ue in described user set_iEstimate the described downlink reception timing from timing base AP and from the timing time difference between the downlink reception timing of target AP, and by described timing time difference uplink feedback to timing base AP；

Described timing base AP utilize user to gather in the timing adjustment amount of described timing TDOA estimation target AP fed back of user.

11. the method for claim 1, it is characterised in that described target AP is with timing base AP as timing base, and the adjustment carrying out uplink receiving timing and/or downlink timing includes:

Described target AP gathers { ue according to user_i, i=1,2 ... the transmitting timing adjustment amount of timing TDOA estimation target AP that the user in L} is fed back, described user gathers { ue_i, i=1,2 ... the service AP of each user in L} is target AP, and wherein L is the sum of described user；

Described target AP utilizes described transmitting timing adjustment amount to carry out uplink receiving timing and/or the adjustment of downlink timing；

Wherein, the feedback system of the described timing time difference includes:

User ue in described user set_iCarry out down-going synchronous with described timing base AP, obtain the downlink reception timing from timing base AP；

User ue in described user set_iCarry out down-going synchronous with described target AP, obtain the downlink reception timing from target AP；

User ue in described user set_iEstimate the described downlink reception timing from timing base AP and from the timing time difference between the downlink reception timing of target AP, and by described timing time difference uplink feedback to target AP.

12. the method for claim 1, it is characterised in that described target AP is with timing base AP as timing base, and the adjustment carrying out uplink receiving timing and/or downlink timing includes:

Described target AP by obtaining the downlink timing of target AP that described timing base AP determines alternately with the information of described timing base AP；

Described target AP is according to the timing of described downlink and currently used downlink timing estimation timing adjustment amount；

Described target AP carries out downlink timing and/or the adjustment of uplink receiving timing according to described timing adjustment amount；

Wherein, the determination mode of the downlink timing of described target AP includes:

Described timing base AP obtains user set { Ue_i, i=1,2 ... L}, each user Ue in described user set_iService AP be timing base AP, and described user set in each user Ue_iNear target AP, the sum of user during wherein L is described user set；

Described timing base AP is by the propagation delay time between up transmitting timing advance estimation timing base AP and its serviced user of its serviced user；

Described timing base AP utilize self downlink timing and described user gather interior user propagation delay time estimate target AP downlink timing.

13. the method for claim 1, it is characterised in that described target AP is with timing base AP as timing base, and the adjustment carrying out uplink receiving timing and/or downlink timing includes:

Described target AP obtains the uplink receiving timing of target AP of described timing base AP estimation alternately by the information between described timing base AP；

Uplink receiving timing that described target AP is estimated according to timing base AP and currently used uplink receiving timing estimation timing adjustment amount；

Described target AP utilizes described timing adjustment amount to carry out uplink receiving timing and/or the adjustment of downlink timing；

Wherein, the estimation mode of the uplink receiving timing of described target AP includes:

Described timing base AP obtains user set { Ue_i, i=1,2 ... L}, each user Ue in described user set_iService AP be timing base AP, and described user set in each user Ue_iNear target AP, the sum of user during wherein L is described user set；

Described timing base AP utilizes the up transmitting timing advance { TA that described user gathers_i, i=1,2 ... the uplink receiving timing of L} estimation target AP.

14. methods as claimed in claim 13, it is characterised in that the up transmitting timing advance that described timing base AP utilizes described user to gather interior user estimates that the uplink receiving timing of target AP includes:

The up transmitting timing advance { TA that described timing base AP gathers according to described user_i, i=1,2 ... the uplink receiving timing of downlink timing estimation target AP that L} and timing base AP self uses,

T_bechmark,ul=T₀-f({TA_i, i=1,2 ... L}), wherein T_bechmark,ulFor the uplink receiving timing of target AP, { TA_i, i=1,2 ... function f () of L} is: $f\left(\right\{{\mathrm{TA}}_i,i=1,2,...L\left\}\right)=\frac{{\mathrm{\Σ}}_{j=1}^L({\mathrm{TA}}_i+OFFSET)}{2L},$ $f\left(\right\{{\mathrm{TA}}_i,i=1,2,...L\left\}\right)=$ $min\left(\right\{\frac{{\mathrm{TA}}_i+OFFSET}{2},i=1,2,...L\left\}\right),$ Or $f\left(\right\{{\mathrm{TA}}_i,i=1,2,...L\left\}\right)=max\left(\right\{\frac{{\mathrm{TA}}_i+OFFSET}{2},i=1,2,...L\left\}\right).$

15. methods as claimed in claim 13, it is characterised in that the uplink receiving timing that described target AP is estimated according to timing base AP includes with currently used uplink receiving timing estimation timing adjustment amount:

Described target AP utilizes described uplink receiving timing T_bechmark,ulAnd up correction amount^ULEstimate user UE_jUplink receiving timing, described user UE_jService AP be target AP, T_ul,j=T_bechmark,ul+Δ^UL-lag_j, wherein T_ul,jFor user UE_jUplink receiving timing, lag_jIt is target AP to user UE_jDelay；

Described target AP is by T_bechmark,ul+Δ^ULThe uplink receiving timing currently employed with target AP compares, and determines timing adjustment amount.

16. the method for claim 1, it is characterised in that described target AP is with timing base AP as timing base, and the adjustment carrying out uplink receiving timing and/or downlink timing includes:

Described target AP is mutual by the information between described timing base AP, obtains the timing adjustment amount of target AP that described timing base AP estimates；

Described target AP carries out uplink receiving timing and/or the adjustment of downlink timing according to described timing adjustment amount；

Wherein, the estimation mode of the timing adjustment amount of described target AP includes:

Obtain user set { ue_i, i=1,2 ... L}, the service AP of each user in described user set is target AP, and wherein L is the sum of described user；

Described timing base AP obtains the user ue in described user set_iAscending physical signal signal；

Described timing base AP is by detecting described user ue_iAscending physical signal Signal estimation uplink receiving timing；

The reception timing that user is gathered by described timing base AP compares with the reception timing of himself serviced user, estimates the timing adjustment amount of target AP.

17. the method for claim 1, it is characterised in that described target AP is with timing base AP as timing base, and the adjustment carrying out uplink receiving timing and/or downlink timing includes:

Described target AP obtains user set { Ue_i, i=1,2 ... the user Ue in L}_iAscending physical signal signal, described user gathers { Ue_i, i=1,2 ... each user Ue in L}_iService AP be timing base AP, and described user set in each user Ue_iClose target AP, the sum of user during wherein L is described user set；

Described target AP is by detecting described user Ue_iAscending physical signal signal, estimate the uplink receiving timing that described user gathers；

The uplink receiving timing that described user is gathered by described target AP compares with the uplink receiving timing of himself serviced user, estimates the timing adjustment amount of target AP；

Described target AP carries out uplink receiving timing and/or the adjustment of downlink timing according to described timing adjustment amount.

18. methods as claimed in claim 17, it is characterised in that the uplink receiving timing that described user is gathered by described target AP compares with the uplink receiving timing of himself serviced user, estimates that the timing adjustment amount of target AP includes:

Described target AP utilizes the uplink receiving timing { ArrivalTime that described user gathers_i, i=1,2 ... L} and its up correction amount configured^ULEstimate target AP serviced user UE_jTransmitting timing T_ul,j, T_ul,j=T_bechmark,ul+Δ^UL-lag_j

Wherein T_bechmark,ul=f ({ ArrivalTime_i, i=1,2 ... L}), { ArrivalTime_i, i=1,2 ... the form of function f () of L} is:

$f\left(\right\{{\mathrm{ArrivalTime}}_i,i=1,2,...L\left\}\right)=\frac{{\mathrm{\Σ}}_{j=1}^L{\mathrm{ArrivalTime}}_j}{L}$

Or

f({ArrivalTime_i, i=1,2 ... L})=min ({ ArrivalTime_i, i=1,2 ... L})

Or

f({ArrivalTime_i, i=1,2 ... L})=max ({ ArrivalTime_i, i=1,2 ... L})；

Described target AP is by T_bechmark,ul+Δ^ULThe uplink receiving timing currently employed with target AP compares, and determines the timing adjustment amount of target AP.

19. the method for claim 1, it is characterised in that described target AP is with timing base AP as timing base, and the adjustment carrying out uplink receiving timing and/or downlink timing includes:

Described target AP obtains user set { UE_i, i=1,2 ... user UE in L}_iAscending physical signal signal, described user collection be combined into { UE_i, i=1,2 ... the user UE in L}_iFor the user near described target AP, wherein L is the sum of described user；

Described target AP is according to described user UE_iAscending physical signal Signal estimation user UE_iUplink receiving timing in target AP；

Described target AP obtains, from described timing base AP, the user UE that described timing base AP estimates_iAt the uplink receiving timing of timing base AP, wherein said user UE_iEstimation mode in the uplink receiving timing of timing base AP includes: described timing base AP obtains described user and gathers interior user UE_iAscending physical signal signal, described timing base AP is according to described user UE_iAscending physical signal Signal estimation user UE_iUplink receiving timing at timing base AP；

Described target AP obtains user UE_iUplink receiving timing and user UE in target AP_iUplink receiving time difference Δ between the uplink receiving timing of timing base AP_i, obtain the time difference { Δ of the uplink receiving timing of user's set_i}；

Described target AP utilizes the time difference { Δ of the uplink receiving timing that described user gathers_iDetermine the timing adjustment amount of target AP；

Described target AP utilizes the timing adjustment amount of target AP to carry out uplink receiving timing and/or the adjustment of downlink timing.

20. methods as described in claim 10 to 19 any claim, it is characterised in that the step that described target AP utilizes described timing adjustment amount to carry out uplink receiving timing and/or downlink adjustment regularly specifically includes:

Postponing the downlink timing of target AP, the time size of delay is timing adjustment amount；

The uplink receiving timing of target AP in advance, time size in advance is timing adjustment amount.

21. the method for claim 1, it is characterised in that before the timing base AP of described target AP determined in heterogeneous network, described method also includes:

Target AP in heterogeneous network is powered on and initializes.

22. the method for claim 1, it is characterised in that described method also includes:

Within the clock cycle set, described target AP uses current downlink timing to communicate with its serviced user with uplink receiving timing；

When time-out of described clock cycle, described target AP uses timing base AP to be timing base, carries out uplink receiving timing and/or the adjustment of downlink timing.

23. the method for claim 1, it is characterised in that described method also includes:

When described target AP needs to receive the downstream signal from described timing base AP,

nullWhen target AP and the frequency spectrum resource that its serviced communicating between users is used communicate with between target AP with timing base AP the frequency spectrum resource used identical time，Need on described frequency spectrum resource to timing base AP up transmitting signal if target AP needs to receive downstream signal or target AP from timing base AP on described frequency spectrum resource，Then within the time period carrying out initial timing control、In carrying out the periodicity time-controlled time period and in carrying out the event-triggered timing controlled ground time period,Target AP is by utilizing the configuration being its serviced user or stopping scheduling user,Make user within the time period carrying out initial timing control、Up and/or the downlink communication with target AP is interrupted in carrying out the periodicity time-controlled time period and in carrying out the event-triggered timing controlled ground time period.

24. the method for claim 1, it is characterised in that described method also includes:

Between target AP from user mutual timing information use frequency spectrum resource communicate with between target AP with timing base AP use frequency spectrum resource different, or when the connection between target AP and timing base AP is wired connection mode, carrying out in the time period of initial timing control, in carrying out the periodicity time-controlled time period and in carrying out the event-triggered timing controlled ground time period, target AP keeps the communication between its serviced user.

25. 1 kinds of access points, it is characterised in that described access point is target AP needing in heterogeneous network to be timed, and described access point includes:

Timing base AP determines unit, for determining the timing base AP of described target AP, the wherein said timing base AP determining target AP includes: at least one in the reception power of the signal receiving the AP searched according to footprint size, transmitting power and target AP of the AP searched determines the timing base AP of described target AP, including: the timing base AP of described target AP is determined according to transmitting power and the reception power of the AP searched；Or the timing base AP of described target AP is determined according to the information whether in the AP searched with described target AP；

Timing adjustment module, for timing base AP as timing base, carries out uplink receiving timing and/or the adjustment of downlink timing to described target AP；

Described access point also includes:

Judging unit, for when detecting for triggering the generation of time-controlled trigger event, judge whether to need to redefine timing base AP according to described trigger event, if, then redefine the timing base AP of target AP, and with the timing base AP that redefines as timing base, carry out uplink receiving timing and/or the adjustment of downlink timing, the described transmitting power change including target AP and timing base AP for triggering time-controlled trigger event, radio frequency parameter changes.

26. access points as claimed in claim 25, it is characterised in that described timing base AP determines that unit includes:

Timing base AP configures module, for determining the timing base AP of described target AP according to the configuration information of control station, the footprint size of the AP that described control station can search for according to described target AP, launch power and described target AP receive the AP that can search for signal receive in power at least one determine the timing base AP of described target AP, or the information whether in the AP that can search for according to described target AP with described target AP determines the timing base AP of described target AP.

27. access points as claimed in claim 25, it is characterised in that described timing base AP determines that unit includes:

Oneth AP search module, for making described target AP search for AP on the frequency spectrum resource specified, setting search to AP collection be combined into { AP_i, i=1,2 ... N}, wherein N is the AP number that described target AP searches, N >=1；

First power acquisition module, for reading each AP searched_iSystem information, from described system information, obtain described each AP_iFor the transmitting power of the reference signal that path loss is estimated, obtain launching power setAnd measure the reception power of each reference signal, obtain receiving power set { RSRP_i, i=1,2 ... N}；

First timing base AP determines module, for according to described transmitting power setWith described reception power set { RSRP_i, i=1,2 ... N} estimates the AP belonging to described target AP, and the AP belonging to described target AP is defined as the timing base AP of described target AP.

28. access points as claimed in claim 25, it is characterised in that described timing base AP determines that unit includes:

2nd AP search module, for making described target AP search for AP on the frequency spectrum resource specified, setting search to AP collection be combined into { AP_i, i=1,2 ... N}, wherein N is the AP number that target AP searches, N >=1；

Connection establishment module, for setting up described target AP and the connection of each AP searched to carry out information mutual；

Second timing base AP determines module, and for mutual according to the information with described connection establishment module, the AP of the information in the AP that will search with described target AP is defined as the timing base AP of described target AP.

29. access points as claimed in claim 25, it is characterised in that described timing base AP determines that unit includes:

3rd AP search module, for making described target AP search for AP on the frequency spectrum resource specified, setting search to AP collection be combined into { AP_i, i=1,2 ... N}, wherein N is the AP number that target AP searches, N >=1；

Coverage information processing module, for making described target AP read the system information of each AP searched, the covering size information of each AP is obtained from described system information, and according to the covering size information of described each AP, the several AP selecting coverage maximum from the AP searched form AP subset { AP_index(j), j=1,2 ... M, M≤N}；

Second power acquisition module, for making the reference signal for path loss estimation of described target AP each AP to searching measure, estimates the reception power RSRP of described reference signal_i；

3rd timing base AP determines module, for according to described AP subset { AP_index(j), j=1,2 ... the reception power RSRP of each AP in M, M≤N}_iSize, by described AP subset { AP_index(j), j=1,2 ... RSRP in M, M≤N}_iThe AP of value maximum is defined as the timing base AP of described target AP.

30. access points as claimed in claim 25, it is characterised in that described timing base AP determines that unit includes:

4th AP search module, for making described target AP search for AP on the frequency spectrum resource specified, setting search to AP collection be combined into { AP_i, i=1,2 ... N}, wherein N is the AP number that described target AP searches, N >=1；

3rd power acquisition module, each AP searched for making described target AP read_iSystem information, from described system information, obtain described each AP_iFor the transmitting power of the reference signal that path loss is estimated, obtain launching power set $\{P_{CRS}^i,i=1,2,...N\};$

4th timing base AP determines module, is used for making described target AP by described transmitting power setIn the AP corresponding to maximum be set to the timing base AP of described target AP.

31. access points as claimed in claim 25, it is characterised in that described timing adjustment module includes:

Downlink reception timing acquisition module, for carrying out synchronize by the downstream signal of described target AP with described timing base AP, it is thus achieved that the downstream signal of described timing base AP is in the downlink reception timing of described target AP；

Downlink timing adjustment module, for using the descending correction amount of described target AP^DLAdjust described downlink reception timing acquisition module obtain downlink reception timing, and will adjust after the downlink that downlink reception timing determination is described target AP downstream signal timing.

32. access points as claimed in claim 25, it is characterised in that described timing adjustment module includes:

Up transmitting timing acquisition module, is used for making described target AP launch uplink synchronizing signals to described timing base AP and carries out uplink synchronous, obtains, according to the feedback of described timing base AP, the up transmitting timing that described target AP synchronizes at described timing base AP；

Uplink receiving timing adjustment module, for using the up correction amount of described target AP^ULUp transmitting timing to being obtained is adjusted, the uplink receiving that up transmitting timing determination the is described target AP upward signal timing after adjusting；

Up transmitting timing determination block, the uplink receiving timing of target AP for determining according to described uplink receiving timing adjustment module, the propagation delay time between target AP and its serviced user determine the up transmitting timing of described user.

33. access points as claimed in claim 25, it is characterised in that described timing adjustment module includes:

First information interactive module, for making described target AP obtain the timing adjustment amount of described target AP that described timing base AP determines alternately by the information between described timing base AP；

First timing adjustment module, the timing adjustment amount for making described target AP utilize described first information interactive module to obtain carries out uplink receiving timing and/or the adjustment of downlink timing；

The determination mode of the timing adjustment amount of wherein said target AP includes:

Described timing base AP obtains user set { Ue_i, i=1,2 ... L}, each user Ue in described user set_iService AP be timing base AP, and described user set in each user Ue_iNear target AP, the sum of user during wherein L is described user set；

User Ue in described user set_iCarry out down-going synchronous with timing base AP, obtain the downlink reception timing from timing base AP；

User Ue in described user set_iCarry out down-going synchronous with target AP, obtain the downlink reception timing from target AP；

User Ue in described user set_iEstimate the described downlink reception timing from timing base AP and from the timing time difference between the downlink reception timing of target AP, and by described timing time difference uplink feedback to timing base AP；

Described timing base AP utilize user to gather in the timing adjustment amount of described timing TDOA estimation target AP fed back of user.

34. access points as claimed in claim 25, it is characterised in that described timing adjustment module includes:

First timing adjustment amount acquisition module, is used for making described target AP gather { ue according to user_i, i=1,2 ... the transmitting timing adjustment amount of timing TDOA estimation target AP that the user in L} is fed back, described user gathers { ue_i, i=1,2 ... the service AP of each user in L} is target AP, and wherein L is the sum of described user；

Second timing adjustment module, the timing adjustment amount of launching obtained for making described target AP utilize carries out uplink receiving timing and/or the adjustment of downlink timing；

Wherein, the feedback system of the described timing time difference includes:

User ue in described user set_iCarry out down-going synchronous with described timing base AP, obtain the downlink reception timing from timing base AP；

User ue in described user set_iCarry out down-going synchronous with described target AP, obtain the downlink reception timing from target AP；

User ue in described user set_iEstimate the described downlink reception timing from timing base AP and from the timing time difference between the downlink reception timing of target AP, and by described timing time difference uplink feedback to target AP.

35. access points as claimed in claim 25, it is characterised in that described timing adjustment module includes:

Second information interactive module, for making described target AP obtain the downlink timing of target AP that described timing base AP estimates alternately by the information between described timing base AP；

Second timing adjustment amount acquisition module, the downlink timing estimation timing adjustment amount that downlink timing for making described target AP obtain according to described second information interactive module is the most currently used with target AP；

3rd timing adjustment module, for making described target AP utilize described timing adjustment amount to carry out its downlink timing and/or the adjustment of uplink receiving timing；

Wherein, the estimation mode of the downlink timing of described target AP includes:

Described timing base AP obtains user set { Ue_i, i=1,2 ... L}, each user Ue in described user set_iService AP be timing base AP, and described user set in each user Ue_iNear target AP, the sum of user during wherein L is described user set；

Described timing base AP is by the propagation delay time between up transmitting timing advance estimation timing base AP and its serviced user of its serviced user；

Described timing base AP utilize self downlink timing and described user gather interior user propagation delay time estimate target AP downlink timing.

36. access points as claimed in claim 25, it is characterised in that described timing adjustment module includes:

3rd information interactive module, for making described target AP obtain the uplink receiving timing of target AP that described timing base AP estimates alternately by the information between described timing base AP；

3rd timing adjustment amount acquisition module, for the uplink receiving timing uplink receiving timing estimation timing adjustment amount the most currently used with target AP making described target AP obtain according to described 3rd information interactive module；

4th timing adjustment module, for making described target AP utilize described timing adjustment amount to carry out uplink receiving timing and/or the adjustment of downlink timing；

Wherein, the estimation mode of the uplink receiving timing of described target AP includes:

Described timing base AP obtains user set { Ue_i, i=1,2 ... L}, each user Ue in described user set_iService AP be timing base AP, and described user set in each user Ue_iNear target AP, the sum of user during wherein L is described user set；

Described timing base AP utilizes the up transmitting timing advance { TA that described user gathers_i, i=1,2 ... the uplink receiving timing of L} estimation target AP.

37. access points as claimed in claim 25, it is characterised in that described timing adjustment module includes:

4th information interactive module, for making described target AP obtain the timing adjustment amount of target AP that described timing base AP estimates alternately by the information between described timing base AP；

5th timing adjustment module, for making described target AP carry out uplink receiving timing and/or the adjustment of downlink timing according to described timing adjustment amount；

Wherein, the estimation mode of the timing adjustment amount of described target AP includes:

Obtain user set { ue_i, i=1,2 ... L}, the service AP of each user in described user set is target AP, and wherein L is the sum of described user；

Described timing base AP obtains the user ue in described user set_iAscending physical signal signal；

Described timing base AP is by detecting described user ue_iAscending physical signal Signal estimation uplink receiving timing；

The reception timing that user is gathered by described timing base AP compares with the reception timing of himself serviced user, estimates the timing adjustment amount of target AP.

38. access points as claimed in claim 25, it is characterised in that described timing adjustment module includes:

First parameter configuration acquisition module, is used for making described target AP obtain user set { Ue_i, i=1,2 ... the user Ue in L}_iAscending physical signal signal, described user gathers { Ue_i, i=1,2 ... each user Ue in L}_iService AP be timing base AP, and described user set in each user Ue_iClose target AP, the sum of user during wherein L is described user set；

First uplink receiving timing estimate module, is used for making described target AP by detecting described user Ue_iAscending physical signal signal, estimate described user gather { Ue_i, i=1,2 ... the uplink receiving timing of L}；

5th timing adjustment amount acquisition module, the uplink receiving timing being used for uplink receiving timing and himself the serviced user making described target AP described user be gathered compares, and estimates the timing adjustment amount of target AP；

6th timing adjustment module, for making described target AP carry out uplink receiving timing and/or the adjustment of downlink timing according to described timing adjustment amount.

39. access points as claimed in claim 25, it is characterised in that described timing adjustment module includes:

Second parameter configuration acquisition module, is used for making described target AP obtain user set { UE_i, i=1,2 ... user UE in L}_iAscending physical signal signal, described user collection be combined into { UE_i, i=1,2 ... the user UE in L}_iFor the user near described target AP, wherein L is the sum of described user；

Second uplink receiving timing estimation module, for the described user UE making described target AP obtain according to described second parameter configuration acquisition module_iAscending physical signal Signal estimation described in user UE_iUplink receiving timing in target AP；

5th information interactive module, for making described target AP obtain, from described timing base AP, the user UE that described timing base AP estimates_iAt the uplink receiving timing of timing base AP, wherein said user UE_iEstimation mode in the uplink receiving timing of timing base AP includes: described timing base AP obtains described user and gathers interior user UE_iAscending physical signal signal, described timing base AP is according to described user UE_iAscending physical signal Signal estimation user UE_iUplink receiving timing at timing base AP；

Uplink receiving time difference computing module, is used for making described target AP obtain user UE_iUplink receiving timing and user UE in target AP_iUplink receiving time difference Δ between the uplink receiving timing of timing base AP_i, obtain described user set { UE_i, i=1,2 ... the time difference { Δ of the uplink receiving timing of L}_i}；

6th timing adjustment amount acquisition module, is used for the time difference { Δ of the uplink receiving timing making described target AP utilize described user to gather_iDetermine the timing adjustment amount of target AP；

7th timing adjustment module, for making described target AP utilize the timing adjustment amount of target AP to carry out uplink receiving timing and/or the adjustment of downlink timing.