CN104796927A

CN104796927A - Discovery Signal reception method and device and discovery signal detection method and device

Info

Publication number: CN104796927A
Application number: CN201410026277.1A
Authority: CN
Inventors: 杨云川; 李迎阳; 张世昌; 付景兴; 孙程君
Original assignee: Beijing Samsung Telecommunications Technology Research Co Ltd; Samsung Electronics Co Ltd
Current assignee: Beijing Samsung Telecom R&D Center; Beijing Samsung Telecommunications Technology Research Co Ltd; Samsung Electronics Co Ltd
Priority date: 2014-01-20
Filing date: 2014-01-20
Publication date: 2015-07-22

Abstract

The invention discloses a Discovery Signal (Dis) reception method which comprises that UE in communication connection with a macro cell is established, and timing auxiliary information of a small cell is determined according to the timing relation between the macro cell and the small cell; and according to the timing auxiliary information of the small cell, the UE determines reception time of downlink subframe of the Dis sent from the small cell, and receives the Dis in the reception time. The invention also discloses a Dis detection method. Thus, ON/OFF switching time of the small cell can be reduced, and the system performance is improved.

Description

A kind of reception detection method and equipment finding signal

Technical field

The application relates to mobile communication technology field, specifically, the application relates in the scene of small-cell, how UE utilizes limited radio network signaling, determines the configuration information of the discovery signal (Discovery Signal) that small-cell sends and receives the method and apparatus detecting Discovery Signal.

Background technology

In order to tackle mobile communication business explosive growth, especially for some indoor and outdoors scenes, in macrocell (Marco cell) coverage, introduce some lower powered nodes provides small-cell to cover (Small cell), such as Pico or Home eNodeB Femto eNB, shunt Mobile data, thus more effectively can realize the uniform fold of network capacity and eliminate the cavity that single covering causes, and then the spectrum efficiency of elevator system, accepted by 3GPP standard, become LTE-A(LTE-Advanced) candidate's evolution tendency of system.

About in the Enhancement Technology of small-cell, specifically comprise three scenes.First scene is that macrocell and small-cell are deployed in identical operating frequency, wherein macrocell completes the covering of macrocellular, and providing focus coverage enhancement by the small-cell of dense deployment, small-cell can be divided into one or more cell cluster (small cell cluster) here.Second scenario is the situation that macrocell and small-cell are deployed in different frequency, similar, macrocell provides covering, and complete focus covering by dense deployment small-cell, here, small-cell can be divided into one or more cell cluster equally, under this scene, small-cell in cell cluster is deployed in same storied building room, is namely deployed in indoor scene.3rd scene is the situation of only disposing small-cell, and small-cell can be divided into one or more cell cluster equally, dense deployment small-cell in each cell cluster, and each cell cluster can be deployed in same storied building room.According to the discussion of current RAN1, multiple small-cells that geographical position deploy is more adjacent can be called a cell cluster, and in simulation analysis, the small-cell number of disposing in each cell cluster can be 4, or 10, correspond to low-density and highdensity cell scenario respectively.For above-mentioned three kinds of small-cell scenes, a common subject matter is that small-cell is disposed quite than comparatively dense, and its mutual interference ratio comparatively seriously, is also subject to the interference from macrocell for scene 1, UE terminal.Therefore, the interference how processed in above-mentioned three scenes is the problem that first will solve.

According to the discussion in current RAN1, propose a kind of up-and-coming small-cell enhancing technology, this technology only just activates when needs and opens a small-cell, and closes those unwanted small-cells, thus reduce the interference level of whole network, and then the user throughput of elevator system.These need to depend on business demand, network load condition or high-rise configuration.Following this technology is called small-cell ON/OFF.This is because, in existing LTE system, even if any UE terminal is not served in a small-cell, this small-cell still needs to send cell reference signals (Cell-specific Reference Signal, CRS), and CRS needs to send with higher power, thus cause the interference of the small-cell to other active services UE terminal.More intuitively, by the small-cell of these current not service UE is closed, thus do not send CRS, reduce the interference of the small-cell of the UE terminal to adjacent active service, and then improve the user throughput of system.Meanwhile, these unwanted small-cells are closed, the energy consumption of system can be effectively reduced.But need the processing time for the opening and closing of small-cell, if process time delay is larger, this small-cell ON/OFF technology may not bring benefit, and systematic function even can be caused to decline.

In order to effectively support that small-cell ON/OFF operates, reducing the impact of the transformation time of the opening and closing of small-cell, in the discussion of current RAN1, introducing a kind of discovery reference signal (Discovery Signal, Dis).Concrete, in during small-cell is closed, small-cell only can send Dis to indicate UE terminal surrounding to exist small-cell that some are in closedown to the UE terminal periodic in cell cluster.UE finds signal accordingly by detecting, and measures and report macro base station (Marco cell) to the community of this dormancy, such as reference information received signal power (RSRP) or Reference Signal Received Quality (RSRQ).Thus network according to the service distribution of UE and channel conditions, can be selected optimum small-cell, and utilizes this small-cell to carry out the up-downgoing transfer of data of service UE terminal fast.As shown in Figure 1.According to current 3GPP conclusion, these Discovery Signal redefine, existing reference signal can be continued to use, such as primary and secondary synchronization signals (PSS/SSS), cell special reference (CRS), location reference signals (PRS), and channel condition information measuring reference signals (CSI-RS).

Owing to not establishing a communications link between UE and the small-cell being in closed condition, UE cannot determine the reception timing relationship of the Dis that small-cell sends.In order to obtain the configuration information of the contiguous small-cell of UE, such as physical district ID, resource distribution etc., UE needs by searching in the time window of certain length, determine the thick synchronizing information of Dis, and carry out corresponding Dis detection, obtain the configuration information of small-cell.The thick synchronizing information timing method of Dis is similar to the descending timing method based on PSS/SSS primary and secondary synchronization signals in existing LTE system.UE terminal adopts the thick synchronizing information obtaining Dis based on the operation that time-domain received signal slip is relevant usually.This coarse synchronization method time complexity is higher.As shown in Figure 2, suppose that there is multiple small-cell sends Dis, and the transmitting time of Dis is asynchronous, then by causing UE needs to be searched in longer time window, detect the Dis sent from multiple small-cell.Such synchronous method brings serious burden and power consumption by giving UE terminal.Simultaneously, window length search time of Dis is longer, be then unfavorable for that UE identifies and detects the community that may be used for establishing a communications link, and is unfavorable for shortening small-cell by the change-over time being closed to unlatching, effectively can not support that small-cell ON/OFF operates, systematic function even may be caused to decline.

In existing system, for TDD system, the synchronization mechanism between small-cell is absolutely necessary.For FDD system, although between small-cell is not synchronously necessary, but for some typical interference-limited scenes, under prerequisite synchronous among the nodes, adopt interference coordination mechanism can obtain larger gain, such as EICIC, CoMP etc., or the interference cancellation receiver technology of advanced person.As can be seen here, no matter TDD or FDD system, the discussion for small-cell stationary problem is all significantly.Stationary problem in the scene of small-cell mainly comprises three aspects: 1) macrocell is internodal synchronous with small-cell, 2) synchronous what be between the small-cell in same cell cluster is synchronous, 3) between different districts bunch.In existing RAN1 discusses, three kinds of modes are had to solve stationary problem between macrocell and small-cell and between small-cell.The first scheme is the synchronization scenario based on satellite fix, such as utilizes GPS (Global Position System) GPS; First scheme such as adopts based on IEEE1588v2 system based on the synchronous of backhaul (backhual) link, this system can provide the synchronization accuracy of the wonderful level of sub-micro, the third scheme, based on the synchronous method of eating dishes without rice or wine, such as adopts the mode that the mode of network monitoring and UE assist.

On the other hand, according to the conclusion of current 3GPP, Dis needs the id information carrying small-cell, is similar to existingly to carry out Cell searching mechanism based on PSS/SSS synchronizing signal, each PSS/SSS sequence pair answers a cell ID information, and one has 504 community ID configuration informations.In order to obtain the id information of community, need to travel through these 504 kinds possible SSS synchronizing signals, for UE, search complexity is higher.Dispose intensive community for a small-cell, then the id information comprised is more, has increased the weight of the search complexity of UE further.

By analyzing above and can seeing, when the unknown small-cell of UE sends the synchronizing information of Dis or entrained id information, or configuration information, will seriously increase the burden of network and terminal, be unfavorable for that UE fast and effeciently identifies the community that may establish a communications link.In discussing according to existing RAN1, the stationary problem between macrocell and small-cell and between small-cell can have various ways to solve.How UE rationally applies the synchronized relation between them, and then determine that small-cell sends the descending sub frame reception timing of Dis and corresponding configuration information, the impact of the change-over time of the opening and closing of further reduction small-cell, thus optimize the performance of small-cell ON/OFF, be the problem to be solved in the present invention.

Summary of the invention

This application discloses reception detection method and the equipment of a kind of Discovery Signal, the change-over time of small-cell ON/OFF can be reduced, improve systematic function.

For achieving the above object, the application adopts following technical scheme:

A method of reseptance of Discovery Signal, comprising:

The UE established a communications link with macrocell, determines small-cell timing supplementary; Described small-cell timing supplementary is determined according to the timing relationship between described macrocell and small-cell;

Described UE, according to described small-cell timing supplementary, determines that small-cell sends and finds that the descending sub frame of signal Dis receives timing, and according to Dis described in this reception timing receipt.

Preferably, described according to the timing relationship between macrocell with small-cell determine small-cell timing supplementary mode comprise: macrocell and small-cell are set up synchronous, and described macrocell determines the timing adjustment offset Δ T between self and small-cell; Up pre-set time is measured TA and described timing adjustment offset Δ T and sends to described UE as small-cell timing supplementary by described macrocell;

Described UE determines that the descending sub frame of small-cell transmission Dis receives timing for T2-TA/2+ Δ T; Wherein, T2 is that the macrocell descending sub frame that UE determines receives timing.

Preferably, described macrocell determines that the timing adjustment offset Δ T between self and small-cell comprises:

The descending sub frame that described small-cell sends small-cell to described macrocell sends timing, and described macrocell determines described Δ T; Or,

Macrocell and small-cell direct timing adjustment offset Δ T configures to described macrocell by high system level.

Preferably, timing adjustment offset Δ T is: the descending sub frame between macrocell and small-cell sends timing offset, or the descending sub frame between macrocell and small-cell sends timing offset and the correction sum for overcoming propagation delay between small-cell and UE.

Preferably, macrocell corresponds to each small-cell and determines Δ T respectively, or macrocell is that identical Δ T is determined in the different small-cells in cell cluster.

Preferably, the Δ T of UE is sent to be fixed configurations or semi-static configuration.

Preferably, described macrocell and small-cell are set up synchronous mode and are:

Macrocell and small-cell are all set up synchronous with same common synchronous source; Or,

The synchronous reference signal that small-cell sends by monitoring macrocell, foundation is synchronous with macrocell.

Preferably, describedly determine that the mode of small-cell timing supplementary comprises according to the timing relationship between macrocell with small-cell: macrocell and small-cell are all set up synchronous with same common synchronous source, macrocell up pre-set time is measured TA as small-cell regularly supplementary send to described UE;

Described UE determines that the descending sub frame of small-cell transmission Dis receives timing for T2-TA/2; Wherein, T2 is that the macrocell descending sub frame that UE determines receives timing.

Preferably, described according to the timing relationship between macrocell and small-cell determine small-cell timing supplementary mode comprise:

High system level configures and is defined as small-cell timing supplementary to the timing adjustment side-play amount T4 of small-cell by UE; Described T4 is that high system level configures to the timing adjustment side-play amount of the descending sub frame of small-cell transmission timing relative to T3, and T3 is that the descending sub frame of the macrocell that described small-cell is determined by the described synchronous reference signal of monitoring receives timing;

Described UE determines that the descending sub frame of small-cell transmission Dis receives timing for T2-T4; Wherein, T2 is that the macrocell descending sub frame that UE determines receives timing.

Preferably, high system level is that each small-cell configures T4 respectively, or high system level is that the different small-cells in same cell cluster configure identical T4.

Preferably, described UE determines that the mode of small-cell timing supplementary comprises: described UE determines that macrocell descending sub frame receives timing T2, using this timing as small-cell timing supplementary;

It is that the macrocell descending sub frame that UE determines receives timing T2 that described UE determines that the descending sub frame of small-cell transmission Dis receives timing;

Wherein, when described small-cell sends described Dis, the descending sub frame that the synchronous reference signal determination macrocell that macrocell sends is monitored in small-cell receives timing T3, and according to Dis described in this reception timed sending.

Preferably, the method comprises further: the Dis of described UE receiving system high level configuration receives timing defining method; High system level receives small-cell timing supplementary defining method corresponding to timing defining method to macrocell configuration with described Dis;

Described UE determines described small-cell timing supplementary according to described configuration, determines that the descending sub frame of described Dis receives timing.

Preferably, the Dis of described high system level configuration receives timing defining method for each small-cell and configures respectively, or, be for the unified configuration in each small-cell in same cell cluster.

A detection method of Discovery Signal, comprising:

The UE established a communications link with macrocell receives the Dis configuration information that macrocell sends; Described Dis configuration information is corresponding with the cell cluster around the UE that macrocell is determined or small-cell information;

UE, for the cell cluster corresponding to described Dis configuration information or small-cell, carries out Dis detection.

Preferably, described Dis configuration information is cell cluster numbering cluster_ID information or the id information s=cluster_ID*X+x for initialization Dis sequence, wherein, X is the small-cell number comprised at most in each cell cluster, and x is the physical label id information of the small-cell in each cell cluster.

Preferably, macrocell determines that the mode of UE peripheral cell bunch or small-cell information is: macrocell determines the current location information parameter of UE, according to the mapping relations of the locating information parameter preset and cell cluster or small-cell information, determine that the cell cluster corresponding with described current location information parameter or small-cell information are cell cluster around UE or small-cell information.

Preferably, the locating information parameter of described UE is: the range information between UE and described macrocell eNB or UE are positioned at the positional information that the orientation angles information of described macrocell coverage area or UE are positioned at described macrocell coverage area.

A receiving equipment of Discovery Signal, comprising: timing supplementary receiving element, descending sub frame timing determining unit and Dis receiving element;

Described timing supplementary receiving element, for the small-cell timing supplementary that receiving system high level sends; Described small-cell timing supplementary is determined according to the timing relationship between described macrocell and small-cell;

Described descending sub frame timing determining unit, for according to described small-cell timing supplementary, determines that small-cell sends and finds that the descending sub frame of signal Dis receives timing;

Described Dis receiving element, receives Dis described in timing receipt for the described descending sub frame determined.

A checkout equipment of Discovery Signal, comprising: Dis configuration information receiving element and Dis detecting unit;

Described Dis configuration information receiving element, for receiving the Dis configuration information that macrocell sends; Described Dis configuration information is corresponding with the cell cluster around the UE that macrocell is determined or small-cell information;

Described Dis detecting unit, for for the cell cluster corresponding to Dis configuration information or small-cell, carries out Dis detection.

Adopt method of the present invention, UE sends timing supplementary and the configuration information of Discovery Signal about community by obtaining from high system level radio network signaling, UE just can determine that community sends the downlink reception timing information of Discovery Signal and the configuration information of respective cell, simultaneously, accelerate the community that UE detection and Identification may be used for establishing a communications link, thus shorten community by being closed to the change-over time of opening, thus effectively support that community ON/OFF operates, and improves the performance of system.

Accompanying drawing explanation

Fig. 1 is the schematic diagram opening community based on Discovery Signal;

Fig. 2 is the schematic diagram that multiple small-cell sends Discovery Signal;

Fig. 3 is that the application UE determines that community sends the reception timing flow chart of Discovery Signal;

Fig. 4 is that embodiment one UE determines that small-cell sends the reception timing flow chart of Discovery Signal;

Fig. 5 is that embodiment one UE determines that small-cell sends the reception timing sequence figure of Discovery Signal;

Fig. 6 is that embodiment two UE determines that small-cell sends the reception timing flow chart of Discovery Signal;

Fig. 7 is that embodiment two UE determines that small-cell sends the reception timing sequence figure of Discovery Signal;

Fig. 8 is that embodiment three UE determines that small-cell sends the reception timing flow chart of Discovery Signal;

Fig. 9 is that embodiment three UE determines that small-cell sends the reception timing sequence figure of Discovery Signal;

Figure 10 is that the mode of embodiment three small-cell monitoring Network Based sets up synchronous schematic diagram with macrocell;

Figure 11 is the method for synchronization that embodiment three small-cell is monitored in MBSFN sub-frame

Figure 12 be embodiment three for TDD system, the method for synchronization that small-cell is monitored at special subframe

Figure 13 is that embodiment four UE determines that small-cell sends the reception timing flow chart of Discovery Signal;

Figure 14 is that embodiment four UE determines that small-cell sends the reception timing sequence figure of Discovery Signal;

Figure 15 is that embodiment five UE determines that small-cell sends the reception timing flow chart of Discovery Signal;

Figure 16 is that embodiment five UE determines that small-cell sends the reception timing sequence figure of Discovery Signal;

To be the application reduce based on the locating information of UE the flow chart that UE detects small-cell Dis to Figure 17;

Figure 18 is the basic structure schematic diagram of the receiving equipment of Dis in the application;

Figure 19 is the basic structure schematic diagram of the checkout equipment of Dis in the application.

Embodiment

In order to make the object of the application, technological means and advantage clearly understand, below in conjunction with accompanying drawing, the application is described in further details.

Because UE and between small-cell does not establish a communications link, UE cannot obtain the synchronizing information that small-cell sends Dis.Obviously, continue to use the timing method of existing system to determine the synchronizing information of Dis, UE needs are caused to be searched in longer time window, if there is multiple small-cell to send Dis, the time window of UE search will be longer, make UE cannot complete the discovery of Dis within a short period of time, small-cell channel quality measurement and measuring amount such as to report at the sequence of operations.Undoubtedly, by the increase closedown of community and the transformation time of unlatching, wireless network cannot utilize optimum small-cell to carry out the up-downgoing transfer of data of service UE quickly and effectively.

For UE, before not yet establishing a communications link with small-cell, UE can only establish a communications link with macrocell.Suppose the mode being assisted by wireless network or only rely on limited wireless network auxiliary, UE can obtain the timing supplementary that small-cell sends Dis, or corresponding configuration information, just the thick synchronizing information of Dis can be determined, and carry out the detection of Dis, enable UE terminal find the small-cell of surrounding fast, and then the measuring amount such as RSRP or RSRQ of this small-cell can be reported macrocell by UE in time, macrocell selects optimum small-cell to open according to the measuring amount reported.

According to the discussion of current RAN1, various ways can be had between macrocell and small-cell to realize synchronous, and then small-cell can utilize corresponding synchronizing information to determine the descending sub frame sending Dis to send timing.For the UE established a communications link with macrocell, if it can obtain the timing supplementary sending Dis about small-cell, then in the application UE based on this timing supplementary, just can determine that small-cell sends the descending sub frame reception timing of Dis fast, thus the timing search avoiding UE excessive, the impact of the change-over time of the opening and closing of further reduction small-cell, thus the performance optimizing small-cell ON/OFF.

In order to solve the problem, this application provides a kind of UE and determine that the descending sub frame of community transmission Dis receives timing and receives the method for Dis, is basic procedure of the present invention as shown in Figure 3.Concrete, comprise following steps:

Step 110: the UE established a communications link with macrocell, determines small-cell timing supplementary.

Before this step, set up synchronized relation between macrocell and small-cell, small-cell determines that the descending sub frame sending Dis sends timing, and according to determined transmission timed sending Dis.

In this step, small-cell timing supplementary can be send to UE by high system level by radio network signaling or broadcast message, or, also can be determined by UE.This information is determined according to the timing relationship between macrocell and small-cell, can determine that the descending sub frame of Dis receives timing and provides supplementary for UE.Particularly, according to different implementations, the particular content of timing supplementary is also incomplete same, will be described in detail follow-up.

Step 120:UE, according to the small-cell timing supplementary received, determines that small-cell sends and finds that the descending sub frame of signal Dis receives timing, and according to this reception timing receipt Dis.

Creating a mechanism below according to synchronized relation between macrocell and small-cell, small-cell is determined to send the method for descending sub frame transmission timing of Dis and the different situations of the radio network signaling of transmission, determines that the method for reseptance of descending sub frame reception timing and Dis that small-cell sends Dis is specifically described to UE.

Embodiment one:

Existing system, especially for TDD system and outdoor scene, the stationary problem between macrocell can be set up by monitoring gps clock reference signal.For small-cell research scene one, small-cell major part situation is all deployed in outdoor scene.If small-cell has certain gps clock reference signal capture ability, then it is just set up synchronously by the mode of GPS, obtains corresponding descending sub frame and sends timing.Therefore, the embodiment of the present application mainly provides a kind of small-cell and sets up synchronously based on GPS, and UE determines that small-cell sends the method for the descending sub frame reception timing of Dis.As shown in Figure 4, following steps are comprised.The timing relationship sequential chart be specifically related to can with reference to figure 5.

Step 210: macrocell and small-cell are all set up synchronous with a common synchronous source, obtains corresponding subframe and sends timing T0 and T1, and small-cell sends Dis based on the corresponding timing T1 that sends.

In this step, this common synchronous source can be gps clock, also can be synchronous with GPS settling time common synchronization source.

Step 220: macrocell determination timing adjustment offset Δ T.

In this step, a kind of determine the mode of timing adjustment offset Δ T can be small-cell by backhaul Signalling exchange, send timing T1 to the mutual corresponding descending sub frame of macrocell.Further, macrocell sends timing T0 based on the descending sub frame of oneself, determines corresponding timing adjustment offset Δ T.Another determines that the mode of timing adjustment offset Δ T also can be high-rise directly configuration, or standard directly defines, and does not need to be obtained by the Signalling exchange between small-cell and macrocell.

Step 230: the UE established a communications link with macrocell, receives radio network signaling or broadcast message, obtains the upstream time lead TA that macrocell configures to UE, and timing adjustment offset Δ T.UE receives timing T2 based on the descending sub frame of macrocell, determines that the descending sub frame of small-cell transmission Dis receives timing for T2-TA/2+ Δ T.

In this step, the Main Function of the upstream time lead TA that macrocell configures to UE is that UE resists the propagation delay between macrocell and UE.But, do not get rid of macrocell eNB the revises UE within the specific limits Timing Advance for overcoming propagation delay impact according to its need of work yet, thus obtain the value of TA.Consider the diversity of the communication environments between macrocell and UE, such as shadow fading, the propagation phenomenons such as the refraction diffraction of electromagnetic wave signal, consider the situations such as the timing accuracy error that UE itself may exist simultaneously.Therefore, macrocell can comprise the gap of the distance between macrocell and UE to the upstream time lead TA that UE configures, the compensation on the impact that above-mentioned possible factor of transmission is brought and correction can also be comprised, can also comprise the distance between macrocell and UE gap and on the compensation of the impact that above-mentioned possible factor of transmission is brought and correction.

For the configuring condition of TA, for macrocell, various configurations method can be had.A kind of collocation method can be the propagation delay back and forth of signal between macrocell eNB and UE.Another kind of collocation method can add the correction in certain limit for the propagation delay back and forth of signal between macrocell eNB and UE.Here, the configuring condition of TA is relevant with the specific implementation behavior of macrocell eNB, does not get rid of and has other collocation methods, but its Main Function is be that UE resists the propagation delay between macrocell and UE.

Equally, for the timing adjustment offset Δ T of configuration, its Main Function is that the descending sub frame embodied between macrocell and small-cell sends timing offset.But, do not get rid of macrocell eNB yet and revise affecting for overcoming propagation delay between small-cell and UE of UE within the specific limits according to its need of work, thus obtain the value of Δ T.In the discussion of existing RAN1 about small-cell deployment scenario, the coverage of each cell cluster is 50 meters, ultimate range in cell cluster between small-cell and UE is approximately 120 meters, then mean that the propagation delay that the Dis signal arrival UE that small-cell sends experiences is shorter.This time delay value is 13Ts; wherein Ts=1/ (15000 × 2048) second; the Dis being enough to ensure to send from the small-cell in cell cluster arrives the time difference of UE at Cyclic Prefix (Cyclic Prefix; CP) in protection range; wherein CP length is approximately 4.7 microseconds, is about 144Ts.Therefore, macrocell can comprise the deviation of the descending sub frame transmission timing of setting up synchronization gain between macrocell and small-cell based on GPS to the timing adjustment offset Δ T that UE configures, the impact of propagation delay that may be maximum and UE can also to be comprised between small-cell and UE for overcoming the correction of propagation delay, can also comprise the descending sub frame setting up synchronization gain based on GPS between macrocell and small-cell send timing deviation and may be maximum between small-cell and UE the impact of propagation delay and UE for overcoming the correction of propagation delay.Such as, timing adjustment offset Δ T can be the timing offset between macrocell and small-cell, also can add a correction, such as 13Ts for sending out a timing offset.Here, the configuration of correction is relevant with the specific implementation of macrocell.

For the configuring condition of timing adjustment offset Δ T, multiple method can be had.A kind of collocation method can be the deviation that macrocell and small-cell descending sub frame send timing.For macrocell and small-cell descending sub frame send timing offset, another kind of collocation method can add that UE is for overcoming the correction of propagation delay between small-cell and UE.

A kind of method of the timing adjustment offset Δ T of macrocell configuration can be configured respectively for each small-cell.For this collocation method, radio network signaling or broadcast message need the timing adjustment offset Δ T sending out small-cell respectively each to UE, the expense of corresponding radio network signaling or broadcast message is larger, but contributing to UE can determine that small-cell sends the descending sub frame reception timing of Dis more accurately.

Here, consider actual small-cell deployment scenario, such as, in each cell cluster, between small-cell and small-cell, minimum range is approximately 20 meters, ultimate range is 100 meters, then mean that the time difference arriving UE from the different small-cells transmission Dis signals in cell cluster all can ensure within the scope of CP, or can say that UE is roughly the same for overcoming the correction of propagation delay between small-cell with UE.Therefore, based on this feature, the method for the timing adjustment offset Δ T of macrocell configuration can also be configured respectively for each cell cluster, and identical timing adjustment offset Δ T is shared in the different small-cell in each cell cluster.For this collocation method, the expense of radio network signaling or broadcast message is smaller.

On the other hand, in the deployment of small-cell, the entity form forming small-cell can have multiple, such as Pico, HeNB or Relay.According to different business demands, these entities may be deployed on a moving body, on such as train or Large-Scale Equipment car.Therefore, for the configuration of timing adjustment offset Δ T, can be fixed configurations, also can semi-static configuration.

Therefore, for the UE established a communications link with macrocell, according to step 230, when it receives radio network signaling from macrocell or broadcast message, by reading corresponding signaling or message, obtain upstream time lead TA and the timing adjustment offset Δ T of configuration.For UE, the descending sub frame of the macrocell determined based on oneself receives timing T2, automatically adjust the time quantum of TA/2 on this basis, and pass through the correction of timing adjustment offset Δ T, the descending sub frame that can obtain small-cell transmission Dis receives timing for T2-TA/2+ Δ T.Based on the timing information of this Dis, UE just can the corresponding Dis of direct-detection, obtains the configuration information of small-cell corresponding to Dis.

So far, the present embodiment terminates.In essence, This embodiment describes UE determine small-cell send Dis descending sub frame receive timing method establishment there is accurate descending transmission synchronous condition between macrocell and small-cell under, then by configuration timing adjustment offset Δ T revised.

Embodiment two

It is existing that based in the synchronization mechanism of GPS, internodal synchronization accuracy is higher, the error of synchronization accuracy greatly about 50 ~ 100 nanoseconds, i.e. 1.5Ts ~ 3Ts, wherein Ts=1/ (15000x2048) second.In a sense, what macrocell and small-cell obtained according to gps clock source is synchronously identical, that is has identical descending sub frame to send timing between macrocell and small-cell.Therefore, for UE, system to its configuration and can broadcast corresponding timing adjustment offset Δ T, does not that is need extra radio network signaling notice UE.Therefore, present embodiments provide another kind of small-cell and set up synchronously based on GPS, UE determines that small-cell sends the method for the descending sub frame reception timing of Dis.As shown in Figure 6, following steps are comprised.The timing relationship sequential chart be specifically related to can with reference to figure 7.

Step 310: macrocell and small-cell are all set up synchronous with a common synchronous source, obtains corresponding descending sub frame and sends timing T0 and T1, and small-cell sends Dis based on the corresponding timing T1 that sends.

Equally, in this step, common synchronous source can be gps clock, also can be synchronous with GPS settling time common synchronization source.Based on common synchronization source, macrocell and small-cell can be carry out work according to identical transmission timing.In fact, because the non-ideal factor that some equipment realizes, sending timing can not be completely the same, but as long as deviation is very little, then to a certain extent, the descending sub frame between macrocell and small-cell sends timing and still can be considered as identical.

And for the present embodiment, the descending sub frame between macrocell and small-cell sends timing and can be considered as identical to a certain extent.

Step 320: the UE established a communications link with macrocell, receive radio network signaling or broadcast message, obtain the upstream time lead TA that macrocell configures to UE, UE receives timing T2 based on the descending sub frame of macrocell, determines that the descending sub frame of small-cell transmission Dis receives timing for T2-TA/2.

Equally, in this step, the Main Function of upstream time lead TA that macrocell configures to UE is that UE resists the propagation delay between macrocell and UE.But, do not get rid of macrocell eNB the revises UE within the specific limits Timing Advance for overcoming propagation delay impact according to its need of work yet, thus obtain the value of TA.Macrocell can comprise the gap of the distance between macrocell and UE to the upstream time lead that UE configures, the compensation on the impact that above-mentioned possible factor of transmission is brought and correction can also be comprised, can also comprise the distance between macrocell and UE gap and on the compensation of the impact that above-mentioned possible factor of transmission is brought and correction.

For the configuring condition of TA, for macrocell, can be in a variety of ways.A kind of collocation method can be the propagation delay back and forth of signal between macrocell eNB and UE.Another kind of collocation method can add the correction in certain limit for the propagation delay back and forth of signal between macrocell eNB and UE.Here, the configuring condition of TA is relevant with the specific implementation behavior of macrocell eNB, does not get rid of and has other collocation methods, but its Main Function is be that UE resists the propagation delay between macrocell and UE.

Therefore, for the UE established a communications link with macrocell, according to step 320, when it receives radio network signaling from macrocell or broadcast message, by reading corresponding signaling or message, obtain the upstream time lead TA of configuration.For UE, the descending sub frame of the macrocell determined based on oneself receives timing T2, automatically adjusts the time quantum of TA/2 on this basis, and then the descending sub frame that can estimate small-cell transmission Dis receives timing for T2-TA/2.

So far, the present embodiment terminates.In essence, This embodiment describes the method that descending sub frame that UE determines that small-cell sends Dis receives timing is under being based upon and having identical descending transmission synchronous condition between macrocell and small-cell, as long as UE receives timing based on the descending sub frame of fixed macrocell, revised at the upstream time lead TA configured by macrocell, and then determined that small-cell sends the descending sub frame reception timing of Dis.

Embodiment three

Above-described embodiment one and two, is deployed in outdoor scene mainly for small-cell, and the synchronous mode by GPS/GNSS between macrocell and small-cell is set up.Indoor scene is deployed in for small-cell or there is the hot zones of high constructure around, the second scene of such as aforementioned description and the third scene, the method of synchronization based on GPS/GNSS does not have feasibility, and namely small-cell cannot be caught gps clock source and be obtained corresponding descending sub frame transmission timing.Therefore, need to adopt other synchronization mechanism synchronous to what set up between macrocell and small-cell.The present embodiment proposes a kind of UE based on small-cell by adopting network monitoring mode and setting up synchronous between macrocell, determines that small-cell sends the descending sub frame reception method regularly of Dis.As shown in Figure 8, the method includes the steps of.The timing relationship sequential chart be specifically related to can with reference to figure 9.

Step 410: the synchronous reference signal that small-cell monitoring reception sends from macrocell, determines that the descending sub frame of macrocell receives timing T3.

In network monitoring, configured by network high-level signaling, macrocell sends synchronous reference signal, and small-cell, by Monitor detection, obtains corresponding descending sub frame and receives timing.Synchronous reference signal can continue to use the reference signal of existing system, such as PSS/SSS, CRS etc., also can be the reference signal of new definition.As shown in Figure 10, according to the deployment scenario of small-cell, in cell cluster multiple small-cell synchronously may need just can be completed by single or repeatedly monitor.Such as: when small-cell is deployed in the reasonable region of macrocell covering performance, then just can obtain corresponding descending sub frame by single Monitor detection and receive timing.If small-cell is deployed in the general or poor region of macrocell covering performance, such as away from macrocell eNB region, a small-cell can only listen to the macrocell timing of other small-cells forwarding, then small-cell needs to receive timing by repeatedly monitoring the descending sub frame obtaining macrocell.Such as, to monitor based on MBSFN sub-frame and that two kinds of implementations that special time slot in TDD system is monitored all can be used to set up between macrocell with small-cell is synchronous, as shown in FIG. 11 and 12.

Step 420: small-cell configures the timing adjustment side-play amount T4 receiving timing to the descending sub frame of small-cell transmission timing relative to its macrocell descending sub frame according to high level, determines that the descending sub frame of small-cell transmission Dis sends timing for T3-T4.

In this step, T4 represents that high-rise configuration is to a timing adjustment side-play amount of small-cell.Such as, in the initial networking in small-cell, high level configures a side-play amount just to each small-cell, or configures identical side-play amount to the different small-cells in cell cluster.For small-cell, if the synchronizing signal that it can listen to from macrocell receives timing to obtain corresponding subframe, then carry out correction adjustment by the side-play amount of this configuration, just can determine that corresponding subframe sends timing.This side-play amount T4 is high-rise configuration, just determines, additional wireless network signaling can not be needed to inform small-cell, such as, define in a standard when initial small-cell is disposed.For this side-play amount, its concrete numerical values recited can be on the occasion of, also can be negative value, also can be zero.Such as T4 equals 0.5 millisecond, or T4 equals-0.5 millisecond, or T4 equals 0.For the configuration of this side-play amount, can be fixed configurations, may also be semi-static configuration.

Step 430: macrocell determination timing adjustment offset Δ T.

In this step, a kind of determine the mode of timing adjustment offset Δ T can be small-cell by backhaul Signalling exchange, send timing T3-T4 to the mutual corresponding descending sub frame of macrocell.Further, macrocell sends timing T0 based on the descending sub frame of oneself, determines corresponding timing adjustment offset Δ T.Another determines that the mode of timing adjustment offset Δ T also can be high-rise directly configuration, or standard directly defines, and does not need to be obtained by the Signalling exchange between small-cell and macrocell.

Equally, in this step, the Main Function of timing adjustment offset Δ T is that the descending sub frame embodied between macrocell and small-cell sends timing offset.But, do not get rid of macrocell eNB yet and revise affecting for overcoming propagation delay between small-cell and UE of UE within the specific limits according to its need of work, thus obtain the value of Δ T.Such as, timing adjustment offset Δ T can be T3-T4-T0, and T0 is the descending sub frame transmission timing of macrocell here, also can add that a correction compensates for T3-T4-T0.Therefore, macrocell can comprise the deviation that descending sub frame that monitoring Network Based between macrocell and small-cell sets up synchronization gain sends timing to the timing adjustment offset Δ T that UE configures, can also comprise the impact of propagation delay maximum between small-cell and UE and UE for overcoming the correction of propagation delay.

Equally, timing adjustment offset Δ T method of macrocell configuration can be configured respectively for each small-cell, also can be configured respectively for each cell cluster, identical timing adjustment offset Δ T is shared in the different small-cell in each cell cluster.Concrete configuration method can step 230 in reference example one, is just not repeated here.

Step 440: the UE established a communications link with macrocell, receives radio network signaling or broadcast message, obtains the upstream time lead TA that macrocell configures to UE, and timing adjustment offset Δ T.UE receives timing T2 based on the descending sub frame of macrocell, determines that the descending sub frame of small-cell transmission Dis receives timing for T2-TA/2+ Δ T.

Be similar to the step 230 in embodiment one, the Main Function of TA is that UE resists the propagation delay between macrocell and UE.But, do not get rid of macrocell eNB the revises UE within the specific limits Timing Advance for overcoming propagation delay impact according to its need of work yet, thus obtain the value of TA.Its corresponding collocation method can step 230 in reference example one, does not just state tired here.

Therefore, for the UE established a communications link with macrocell, according to step 430, when it receives radio network signaling from macrocell or broadcast message, by reading corresponding signaling or message, obtain upstream time lead TA and the timing adjustment offset Δ T of configuration.For UE, the descending sub frame of the macrocell determined based on oneself receives timing T2, automatically adjust the time quantum of TA/2 and the correction of timing adjustment offset Δ T on this basis, and then the descending sub frame that can estimate small-cell transmission Dis receives timing for T2-TA/2+ Δ T.

Equally, for UE, the timing adjustment offset Δ T of macrocell configuration is configured respectively for each small-cell, and also can be configured respectively for each cell cluster, identical timing adjustment offset Δ T is shared in the different small-cell in each cell cluster.Concrete configuration method can step 230 in reference example one, is just not repeated here.

So far, the present embodiment terminates.This embodiment describes small-cell and receive timing for benchmark with the descending sub frame obtained by monitoring macrocell reference signal, the correction sending out timing adjustment side-play amount configured to small-cell by high level, obtain descending sub frame and send timing.And in enforcement one, small-cell descending sub frame sends timing by catching GPS synchronous clock source to determine.For UE, as long as it reads corresponding radio network signaling, obtain upstream time lead TA and timing adjustment offset Δ T that macrocell configure to UE, just can determine that small-cell sends the descending sub frame reception of Dis regularly.From the behavior angle of UE, this embodiment and embodiment one are identical, and from the behavior angle of small-cell, both have difference.Therefore, both are all in protection range.

Embodiment four

In above-described embodiment, be mainly based upon there is a desirable backhaul link between macrocell eNB and small-cell basis on, such as based on existing IEEE1588v2 system.But for IEEE1588v2 system, the backhual of rationality is not always feasible.In a practical situation, due to transmission medium, the such as problem of cable or DSL modulator-demodulator, may cause information transmission to have larger deviation and delay.Therefore, time undesirable for the backhaul link between macrocell and small-cell, namely do not have the feasibility of information interaction between them, then UE cannot utilize the timing of sending out of small-cell to determine the reception of Dis regularly.

On the other hand, in the discussion of existing RAN1 about small-cell deployment scenario, the coverage of each cell cluster is 50 meters, in cell cluster, the ultimate range of small-cell and UE is approximately 120 meters, this not only means that the propagation delay that Dis signal arrival UE that small-cell sends experiences is shorter, also means that the synchronous reference signal that macrocell sends has roughly the same propagation delay to UE and small-cell.

Therefore, based on this feature, provide a kind of UE in the present embodiment and determine that small-cell sends the method for the descending sub frame reception timing of Dis based on the descending sub frame timing of macrocell, as shown in figure 13, comprise following steps, concrete sequential chart can with reference to Figure 14.

Step 510: the synchronous reference signal that small-cell monitoring reception sends from macrocell, determines that the descending sub frame of macrocell receives timing T3.

Equally, in this step, small-cell determines that descending sub frame receives method regularly and can adopt the mode of network monitoring to realize.Such as, to monitor based on MBSFN sub-frame and that two kinds of implementations that special time slot in TDD system is monitored all can be used to set up between macrocell with small-cell is synchronous.The method monitored, specifically can step 410 in reference example four, is just not repeated here.

Step 520: small-cell configures the timing adjustment side-play amount T4 receiving timing to the descending sub frame of small-cell transmission timing relative to its macrocell descending sub frame according to high level, determines that the descending sub frame of small-cell transmission Dis sends timing for T3-T4.

Equally, T4 represents that high-rise configuration sends out timing adjustment side-play amount to small-cell, and its collocation method can step 420 in reference example three, is just not repeated here.

Step 530: the UE established a communications link with macrocell, receive radio network signaling or broadcast message, obtain high-rise to a timing adjustment side-play amount T4 of small-cell configuration, UE receives timing T2 based on the descending sub frame of macrocell, determines that the descending sub frame of small-cell transmission Dis receives timing for T2-T4.

Equally, for UE, the timing adjustment side-play amount T4 of macrocell configuration is configured respectively for each small-cell, and also can be configured respectively for each cell cluster, identical timing adjustment side-play amount T4 is shared in the different small-cell in each cell cluster.Concrete configuration method can step 420 in reference example one, is just not repeated here.

So far, the present embodiment terminates.The descending sub frame that This embodiment describes the macrocell that UE determines based on oneself receives timing, more in addition high-rise to the correction sending out timing offset of small-cell configuration, determines that descending sub frame that small-cell sends Dis receives the method for timing.In essence, this embodiment is based upon UE and small-cell and has the identical descending sub frame from macrocell and receive on the basis of timing.

Embodiment five

Small-cell, by monitoring the synchronous reference signal sent from macrocell, can determine that the descending sub frame of macrocell receives timing.For small-cell, diverse ways can there be is determine the descending sub frame sending Dis accordingly to send timing.As shown in embodiment four, a kind of method is the reception of acquisition timing is determined to send Dis by small-cell timing reference benchmark as one, timing adjustment side-play amount is sent by configuring one to small-cell, and then small-cell can determine that the descending sub frame sending Dis sends timing, for this embodiment, need high-rise to small-cell configuration offset Δ T, meanwhile, macrocell needs to inform UE in the mode of radio network signaling or broadcast.The method of the present embodiment is that small-cell is directly based on the corresponding Dis of reception timed sending obtained.

Therefore, this gives another kind, based on UE and small-cell, there is the descending sub frame reception method regularly that small-cell transmission Dis is determined in identical descending sub frame reception timing.As shown in figure 15, the method includes the steps of, and the timing relationship sequential chart be specifically related to can with reference to Figure 16.

Step 610: the synchronous reference signal that small-cell monitoring reception sends from macrocell, determines that the descending sub frame of small-cell receives timing T3, and receives the corresponding Dis of timed sending based on this.

Step 620: the UE established a communications link with macrocell, the descending sub frame based on macrocell receives timing T2, determines that the descending sub frame of small-cell transmission Dis receives timing for T2, according to this reception timing receipt Dis.

Particularly, the descending sub frame of macrocell is directly received timing T2 as small-cell timing supplementary by UE, and this supplementary is received timing as the descending sub frame sending Dis, carries out the reception of Dis.

So far, the present embodiment terminates.This embodiment describes UE equally and is based upon UE and small-cell and has the identical descending sub frame from macrocell and receive and regular basis determines descending sub frame that small-cell sends Dis receives the method for timing.Do not need high-rise to small-cell configuration side-play amount T4 for this embodiment, meanwhile, macrocell does not need, in the mode of radio network signaling or broadcast, side-play amount T4 is informed to UE.

Embodiment six

As described in above-described embodiment, UE obtains by receiving radio network signaling the timing supplementary sending Dis about small-cell, for UE, has multiple implementation to determine that the descending sub frame of small-cell transmission Dis receives timing.Therefore, in order to complete corresponding timing function, need to receive timing defining method by high-level signaling to the Dis that UE configures, UE, by reading high-level signaling, adopts corresponding method to carry out determining that Dis receives timing.Such as, high level command adopts the method for embodiment one to determine Dis reception timing to UE configuration, then UE determines that the reception timing of small-cell Dis is T2-TA/2+ Δ T.High level command adopts the method for embodiment four to determine Dis reception timing to UE configuration, then UE determines that the reception timing of small-cell Dis is T ₂-T ₄.In addition, consider the distance feature relatively between the different small-cells in each cell cluster, the descending sub frame of the determination Dis that high-level signaling configures to UE receives timing method, can be the same according to each cell cluster configuration, also can configure respectively according to each small-cell.Such as, high-level signaling configuration UE determines that the descending sub frame of Dis receives timing method and configures equally according to each cell cluster, and adopting the mode of operation of embodiment one, then the reception timing that all small-cells that UE determines in this cell cluster send Dis is T2-TA/2+ Δ T.Such as, high-level signaling configuration UE determines that the descending sub frame of Dis receives timing method and configures respectively according to each small-cell, then UE determines that the reception timing of different small-cell transmission Dis can be distinct.

On the other hand, for above-described embodiment, need different embodiment to be existed different to the radio network signaling of UE configuration and broadcast message.Such as, in embodiment one, need collocating uplink Timing Advance TA and timing adjustment offset Δ T.And in embodiment two, only need collocating uplink Timing Advance TA, and in enforcement five, do not need collocating uplink Timing Advance TA and timing adjustment offset Δ T.Therefore, in order to complete corresponding timing function, need equally by high-level signaling to the defining method (collocation method of such as radio network signaling) of macrocell configuration small-cell timing supplementary, and the defining method needs of this small-cell timing supplementary and aforementioned Dis receive regularly, and defining method is corresponding.Such as, high-level signaling configuration macrocell needs collocating uplink Timing Advance TA and timing adjustment offset Δ T, high-level signaling configuration UE adopts the mode of enforcement one to determine, and the subframe of Dis receives timing, UE is by reading high-level signaling, obtaining UE adopts embodiment one to determine the method for Dis timing, simultaneously by reading wireless network order, obtains upstream time lead TA and timing adjustment offset Δ T, based on this, just carry out Dis timing according to the mode of embodiment one and confirm.

So far, the present embodiment terminates.

What above-described embodiment described is based under setting up synchronous mechanism between existing macrocell and small-cell, how UE utilizes the timing supplementary sending Dis about small-cell provided from high system level, determines that small-cell sends the scheme of the descending sub frame reception timing of Dis.After UE determines the timing of Dis down receiving signal, just can detect corresponding Dis at the reception timing position of correspondence, determine the small-cell physical label id information corresponding to Dis, and then obtain the configuration information of small-cell.At existing RAN1 about in the scene description of small-cell, 19 macrocells are comprised under each network topology structure, each macrocell is containing 3 sectors, 4 cell clusters are had at most in each sector, and each cell cluster contains at most 10 small-cells, then mean that 2280 small-cells are deployed in this network topology structure altogether.Continue to use the Physical Cell Identifier ID collocation method of existing system, the corresponding Physical Cell Identifier ID in each small-cell, then each small-cell one has 504 kinds of possible small-cell physical label ID.Such as, a main process of existing LTE system small area search is determined synchronously by sending primary and secondary synchronization signals PSS/SSS exactly.The Physical Cell Identifier ID of the generation Jun He community of each PSS/SSS sequence is relevant.In LTE system, one has 540 different Physical Cell Identifier ID, is divided into 168 groups, often organizes 3 marks.3 marks often in group distribute to the community under same eNB control usually.The cell identification that 3 PSS sequences are used in expression group.168 SSS sequences are used for identifying in expression group.For UE, by detecting possible PSS/SSS sequence, identify Physical Cell Identifier ID.First the identifying of Physical Cell Identifier ID needs the PSS sequence that traversal three kinds is possible, the cell identification in acquisition group, secondly, then passes through the possible SSS sequence of traversal 168 kinds, obtains in group and identify.

For disposing intensive small-cell, UE needs the Dis being detected small-cell transmission by the traversal computing of a large amount of number of times, could obtain the physical-layer cell identifier ID of corresponding small-cell.Further, the configuration information of cell reference signals CRS can be obtained according to Physical Cell Identifier ID, UE, and carry out the measurements such as the channel quality RSRP/RSRQ of small-cell and report.This traversal computing, brings serious computation complexity expense and power consumption to UE on the one hand, on the other hand, adds the change-over time that small-cell is closed to unlatching, reduce the performance of small-cell ON/OFF.Suppose that macrocell can based on UE positional information roughly, determine the cell cluster around UE or small-cell, and by rrc layer signaling, the configuration information of the corresponding Dis of notice UE, configuration information can be the id information for initialization Dis sequence, also can be cell cluster number information, also can be the physical label id information of small-cell.

In order to obtain the small-cell of UE candidate, macrocell needs the locating information of UE, macrocell needs to know the locating information parameter of UE and the corresponding relation of cell cluster numbering cluster_ID, if that is macrocell knows the locating information parameter of UE, just can determine roughly have which cell cluster or small-cell around UE.The information parameter of this UE can be the range information of UE and macrocell eNB, also can be the azimuth information that UE is positioned at macrocell coverage area, also can be the positional information in macrocell coverage area at UE.Here, corresponding relation can have various ways to realize, such as, a kind of implementation of corresponding relation is, defines a mapping mode f, makes cell cluster numbering cluster_ID=f (UE locating information parameter), macrocell can calculate the cluster_ID of cell cluster according to the locating information parameter of UE, this mapping mode can be one-to-many, and under a such as UE distance, macrocell may correspond to multiple possible cell cluster.Equally, this mapping mode can be one to one, such as a UE position, the macrocell cell cluster that only correspondence one is possible.For above-mentioned mapping relationship f, can be fixedly installed, be defined as a mapping mode in such as standard, also can be semi-static setting.Or, can also be specifically determine mode by the semi-static UE of setting information parameter and cell cluster numbering mapping relations, such as according to the range information of UE and macrocell eNB, semi-static setting determines that cell cluster is numbered, or, the semi-static orientation angles information being positioned at macrocell coverage area according to UE that arranges determines that cell cluster is numbered, or the semi-static position arranged in macrocell coverage area residing for UE determines that cell cluster is numbered.Such as, the another kind of implementation of corresponding relation also or can pre-define and store the positional information of a UE and the mapping table of cluster_ID for high-rise configuration, this mapping table does not affect actual small-cell deployment scenario, macrocell is according to the information parameter of UE, at this table corresponding, just cell cluster numbering cluster_ID can be obtained.

On the other hand, in existing RAN1 discusses, small-cell is indicated around UE by transmission Dis exists some small-cells that may be used for communicating.Which small-cell UE just can identify by detection Dis and can be used for establishing a communications link, and that is Dis sequence needs the Physical Cell Identifier id information carrying certain small-cell, or relevant with Physical Cell Identifier id information for the ID of initialization Dis sequence.Be similar to existing system, each PSS/SSS sequence all comprises a scrambler sequence and carries out scrambling, and the generation of each scrambler sequence is relevant with Physical Cell Identifier id information, and is distinguished by community ID.Therefore, the ID for initialization Dis sequence is not limited to the physical label ID utilizing small-cell.It can be the physical label ID of small-cell, also can be to comprise the larger set of cell cluster numbering cluster_ID and small-cell ID.Suppose that each macrocell institute overlay area one has N number of cell cluster.Can comprise at most X small-cell in each cell cluster, definition is used for the ID of initialization Dis sequence, and be expressed as s, it may be defined as s=cluster_ID*X+x; Wherein, x is the physical label id information of the small-cell in each cell cluster.Such as, s=cluster_ID*2^6+x, supposes there are at most 64 small-cells in each cell cluster here.Therefore, for macrocell, the rrc layer signaling that UE sends can be the id information of each small-cell for initialization Dis sequence, also can be the number information cluster_ID of each cell cluster.

In order to solve the problem, present invention also provides the method that a kind of locating information based on UE minimizing UE detects small-cell Dis, concrete steps are as follows, as shown in figure 17:

Step 710: macrocell obtains the locating information parameter of UE, determines the cell cluster around UE or small-cell information, by the corresponding Dis configuration information of high-level signaling notice UE.

Wherein, the cell cluster around the UE that determines of macrocell or small-cell information corresponding with Dis configuration information.Can be rrc layer signaling for carrying the high-level signaling of Dis configuration information, will be described for rrc layer signaling in description below, and in certain practical application, being not limited to rrc layer signaling.

Step 720:UE, by reading high-level signaling, obtains corresponding Dis configuration information, carries out Dis detection for the cell cluster corresponding to this Dis configuration information or small-cell.

Obtain the locating information parameter of UE below according to macrocell, and to the different situations of the form of the rrc layer signaling of UE transmission, UE is reduced to the locating information based on UE the method that small-cell Dis detects is specifically described.

Embodiment seven

The present embodiment essentially describes macrocell and mainly determines the cell cluster that exists around UE or small-cell according to the range information between UE and macrocell eNB.That is, in the present embodiment, the locating information parameter of UE is the range information between UE and macrocell eNB.

In current LTE system, downstream transmission all requires the strict time synchronization of transmitting terminal and receiving terminal.For descending, UE needs to detect primary synchronization channel PSS and auxiliary synchronization channel SSS, the descending sub frame obtaining macrocell eNB receives timing T2, and realize the time synchronized with macrocell eNB, UE just can according to the downstream signal of above-mentioned timing receipt from macrocell subsequently.Meanwhile, UE receives timing based on this descending sub frame, sends Random Access Channel PRACH, macrocell eNB by detecting corresponding RACH signal to macrocell eNB, obtains sub-frame of uplink and receives timing T5.Macrocell eNB sends timing T0 according to the descending sub frame of oneself, and the propagation delay that can estimate between macrocell eNB and UE is (T5-T0)/2, and then determines the distance d of UE to macrocell eNB.Macrocell, according to UE range information, determines cell cluster or the small-cell of surrounding, is used for the id information of initialization Dis sequence or cell cluster numbering cluster_ID information further by rrc layer signaling UE small-cell, and then UE implements corresponding Dis and detects.

So far, the present embodiment terminates.

Embodiment eight

The present embodiment essentially describes the cell cluster or small-cell that orientation angles information that macrocell is mainly positioned at macrocell coverage area according to UE determines to exist around UE.That is, in the present embodiment, the locating information parameter of UE is the orientation angles information that UE is positioned at macrocell coverage area.

In existing LTE system, especially for TDD system, network can configure detection reference signal (Sounding Reference Signal, SRS) to UE.Here the configuration of SRS, comprises the distinctive SRS in community and configures and the distinctive SRS configuration of UE.Community SRS configures for users all in community, in the SRS resource that Ji community SRS configures, the user of community cannot transmit other upstream datas (such as Physical Uplink Shared Channel (PUSCH:Physical Uplink Shared Channel) data) and upward signal in this SRS resource.For SRS, it mainly acts on information quality and estimates, thus carries out frequency selective scheduling in the uplink.Just can estimate the corresponding channel information of UE by configuring SRS, macrocell eNB to UE, from channel information, extracting the orientation angles information w that UE roughly may be positioned at macrocell coverage area, such as adopt DOA algorithm for estimating.Macrocell, according to the azimuth information of UE, determines the cell cluster around UE or small-cell.Be used for the id information of initialization Dis sequence or cell cluster numbering cluster_ID information further by rrc layer signaling UE small-cell, and then UE implements corresponding Dis and detects.

So far, the present embodiment terminates.

Embodiment nine

The present embodiment essentially describes the cell cluster or small-cell that positional information that macrocell is mainly positioned at macrocell coverage area according to UE determines to exist around UE.That is, in the present embodiment, the locating information parameter of UE is the positional information that UE is positioned at macrocell coverage area.

Detect the small-cell scope of possibility candidate to reduce UE further, the present embodiment is in conjunction with above-mentioned two embodiments, and macrocell eNB determines the position that UE is roughly possible, to determine the cell cluster around UE or small-cell.Be used for the id information of initialization Dis sequence or cell cluster numbering cluster_ID information further by rrc layer signaling UE small-cell, and then UE implements corresponding Dis and detects.

So far, the present embodiment terminates.

The specific implementation of the Dis detection method that the above-mentioned the application of being provides.Above-mentioned Dis detection method can be combined with existing Dis method of reseptance, or the Dis method of reseptance that also can provide with aforementioned the application combines and uses, thus brings higher systematic function.

The reception of the Dis that the above-mentioned the application of being provides and the specific implementation of detection method.Present invention also provides Dis receiving equipment and checkout equipment, may be used for implementing above-mentioned method of reseptance and detection method.

The basic schematic diagram of basic structure of the Dis receiving equipment that Figure 18 provides for the application.As shown in figure 18, this Dis receiving equipment comprises: timing supplementary determining unit, descending sub frame timing determining unit and Dis receiving element.

Timing supplementary determining unit, for determining small-cell timing supplementary; This small-cell timing supplementary is determined according to the timing relationship between described macrocell and small-cell.Descending sub frame timing determining unit, for according to small-cell timing supplementary, determines that small-cell sends and finds that the descending sub frame of signal Dis receives timing.Dis receiving element, receives timing receipt Dis for the descending sub frame determined.

Receiving equipment shown in above-mentioned Figure 18 may be used for implementing previous embodiment one ~ embodiment five, wherein, timing supplementary determining unit and descending sub frame timing determining unit adopt the mode in corresponding embodiment to determine the reception timing of timing supplementary and descending sub frame.Meanwhile, if increase configuration recognition unit on this receiving equipment, the Dis for the configuration of receiving system high level receives timing defining method; And receive timing supplementary by timing supplementary receiving element according to the method determined, may be used for the method for reseptance implementing previous embodiment six like this.

The basic structure schematic diagram of the Dis checkout equipment that Figure 19 provides for the application.As shown in figure 19, this equipment comprises: Dis configuration information receiving element and Dis detecting unit.

Wherein, Dis configuration information receiving element, for receiving the Dis configuration information that macrocell sends; Here the cell cluster around the UE that determines of Dis configuration information and macrocell or small-cell information corresponding.Dis detecting unit, for for the cell cluster corresponding to Dis configuration information or small-cell, carries out Dis detection.

Checkout equipment shown in above-mentioned Figure 19 may be used for implementing aforementioned Dis detection method, i.e. the method for embodiment seven ~ embodiment nine.

The method and apparatus provided by above-mentioned the application, UE sends timing supplementary and the Dis configuration information of Discovery Signal about community by obtaining from high system level radio network signaling, UE just can determine that community sends the downlink reception timing information of Discovery Signal and the configuration information of respective cell, simultaneously, accelerate the community that UE detection and Identification may be used for establishing a communications link, thus shorten community by being closed to the change-over time of opening, thus effectively support that community ON/OFF operates, and improves the performance of system.

Those skilled in the art are appreciated that realizing all or part of step that above-described embodiment method carries is that the hardware that can carry out instruction relevant by program completes, described program can be stored in a kind of computer-readable recording medium, this program perform time, step comprising embodiment of the method one or a combination set of.

In addition, each functional unit in each embodiment of the application can be integrated in a processing module, also can be that the independent physics of unit exists, also can be integrated in a module by two or more unit.Above-mentioned integrated module both can adopt the form of hardware to realize, and the form of software function module also can be adopted to realize.If described integrated module using the form of software function module realize and as independently production marketing or use time, also can be stored in a computer read/write memory medium.

The above-mentioned storage medium mentioned can be read-only memory, disk or CD etc.

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

Claims

1. a method of reseptance of Discovery Signal, is characterized in that, comprising:

2. method according to claim 1, it is characterized in that, described according to the timing relationship between macrocell with small-cell determine small-cell timing supplementary mode comprise: macrocell and small-cell are set up synchronous, and described macrocell determines the timing adjustment offset Δ T between self and small-cell; Up pre-set time is measured TA and described timing adjustment offset Δ T and sends to described UE as small-cell timing supplementary by described macrocell;

3. method according to claim 2, is characterized in that, described macrocell determines that the timing adjustment offset Δ T between self and small-cell comprises:

4. method according to claim 2, it is characterized in that, timing adjustment offset Δ T is: the descending sub frame between macrocell and small-cell sends timing offset, or the descending sub frame between macrocell and small-cell sends timing offset and the correction sum for overcoming propagation delay between small-cell and UE.

5. method according to claim 2, is characterized in that, macrocell corresponds to each small-cell and determines Δ T respectively, or macrocell is that identical Δ T is determined in the different small-cells in cell cluster.

6. method according to claim 2, is characterized in that, sends to the Δ T of UE to be fixed configurations or semi-static configuration.

7. method according to claim 2, is characterized in that, described macrocell and small-cell are set up synchronous mode and be:

8. method according to claim 1, it is characterized in that, describedly determine that the mode of small-cell timing supplementary comprises according to the timing relationship between macrocell with small-cell: macrocell and small-cell are all set up synchronous with same common synchronous source, macrocell up pre-set time is measured TA as small-cell regularly supplementary send to described UE;

Described UE determines that the descending sub frame of small-cell transmission Dis receives timing for T2-TA/2; Wherein, T ₂the macrocell descending sub frame determined for UE receives timing.

9. method according to claim 1, is characterized in that, described according to the timing relationship between macrocell and small-cell determine small-cell timing supplementary mode comprise:

High system level configures to the timing adjustment side-play amount T of small-cell by UE ₄be defined as small-cell timing supplementary; Described T4 is that high system level configures to the timing adjustment side-play amount of the descending sub frame of small-cell transmission timing relative to T3, and T3 is that the descending sub frame of the macrocell that described small-cell is determined by the described synchronous reference signal of monitoring receives timing;

10. method according to claim 9, is characterized in that, high system level is that each small-cell configures T4 respectively, or high system level is that the different small-cells in same cell cluster configure identical T4.

11. methods according to claim 1, is characterized in that, described UE determines that the mode of small-cell timing supplementary comprises: described UE determines that macrocell descending sub frame receives timing T2, using this timing as small-cell timing supplementary;

12. methods according to claim 1, it is characterized in that, the method comprises further: the Dis of described UE receiving system high level configuration receives timing defining method; High system level receives small-cell timing supplementary defining method corresponding to timing defining method to macrocell configuration with described Dis;

13. methods according to claim 12, is characterized in that, the Dis of described high system level configuration receives timing defining method for each small-cell and configures respectively, or, be for the unified configuration in each small-cell in same cell cluster.

The detection method of 14. 1 kinds of Discovery Signal, is characterized in that, comprising:

15. methods according to claim 14, it is characterized in that, described Dis configuration information is cell cluster numbering cluster_ID information or the id information s=cluster_ID*X+x for initialization Dis sequence, wherein, X is the small-cell number comprised at most in each cell cluster, and x is the physical label id information of the small-cell in each cell cluster.

16. methods according to claim 14, it is characterized in that, macrocell determines that the mode of UE peripheral cell bunch or small-cell information is: macrocell determines the current location information parameter of UE, according to the mapping relations of the locating information parameter preset and cell cluster or small-cell information, determine that the cell cluster corresponding with described current location information parameter or small-cell information are cell cluster around UE or small-cell information.

17. methods according to claim 16, it is characterized in that, the locating information parameter of described UE is: the range information between UE and described macrocell eNB or UE are positioned at the positional information that the orientation angles information of described macrocell coverage area or UE are positioned at described macrocell coverage area.

The receiving equipment of 18. 1 kinds of Discovery Signal, is characterized in that, this equipment comprises: timing supplementary receiving element, descending sub frame timing determining unit and Dis receiving element;

The checkout equipment of 19. 1 kinds of Discovery Signal, is characterized in that, this equipment comprises: Dis configuration information receiving element and Dis detecting unit;