WO2015070429A1 - 小区间同步的方法、基站、基站控制器和*** - Google Patents
小区间同步的方法、基站、基站控制器和*** Download PDFInfo
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- WO2015070429A1 WO2015070429A1 PCT/CN2013/087210 CN2013087210W WO2015070429A1 WO 2015070429 A1 WO2015070429 A1 WO 2015070429A1 CN 2013087210 W CN2013087210 W CN 2013087210W WO 2015070429 A1 WO2015070429 A1 WO 2015070429A1
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- Prior art keywords
- cell
- base station
- cells
- air interface
- interface clock
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- 238000000034 method Methods 0.000 title claims abstract description 63
- 238000005259 measurement Methods 0.000 claims abstract description 42
- 238000001208 nuclear magnetic resonance pulse sequence Methods 0.000 claims abstract 10
- 230000011664 signaling Effects 0.000 claims description 14
- 238000004891 communication Methods 0.000 description 23
- 238000012545 processing Methods 0.000 description 13
- 238000010586 diagram Methods 0.000 description 10
- 230000001360 synchronised effect Effects 0.000 description 8
- 230000006399 behavior Effects 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 6
- 230000006870 function Effects 0.000 description 6
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000007774 longterm Effects 0.000 description 2
- 238000010295 mobile communication Methods 0.000 description 2
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/001—Synchronization between nodes
- H04W56/0015—Synchronization between nodes one node acting as a reference for the others
Definitions
- the present invention relates to the field of communications and, more particularly, to a method, base station, base station controller and system for inter-cell synchronization. Background technique
- the multi-site common cell technology logically divides some physical cells of different sites into the same logical cell. For example, originally, 9 cells belonging to 3 stations are combined into one cell to provide services to mobile stations through multi-site common cell technology. When the mobile station moves within the coverage area of the three sites, no inter-cell handover is required.
- the multi-site common cell technology can reduce the network bandwidth and the number of cell handovers of user equipment, thereby improving service quality and user experience.
- Air interface synchronization technology is usually divided into hardware synchronization and software synchronization.
- Hardware synchronization requires the addition of a GPS (Global Positioning System) clock device with high synchronization accuracy but at a higher cost.
- Software synchronization does not require an additional clock device, but the synchronization accuracy is low.
- the network side device sends an intra-cell handover command to the mobile station, and the mobile station is required to switch from the cell A to the cell B. Then, the cell A and the cell B simultaneously analyze the access request reported by the mobile station AB (Access Burst, access burst sequence), and record the time of receiving the AB frame, and report it to the BSC (Base Station Controller). Finally, the BSC calculates the time difference between the received frame AB and the cell B. , notify cell A to adjust the air interface clock according to the time difference. By repeating the above process continuously, cell A and cell B implement air interface synchronization.
- the mobile station is required to perform cell handover. If frequent air interface clock adjustments are made, the mobile station frequently performs cell handover, which affects network metrics and user experience. Summary of the invention
- Embodiments of the present invention provide a method, a base station, a base station controller, and a system for inter-cell synchronization. Achieve higher accuracy cell synchronization.
- an embodiment of the present invention provides a base station controller, including: a receiving unit, configured to receive measurement information of multiple cells, where the measurement information includes, by a base station, each cell of multiple cells received from the same mobile station.
- the uplink level and the timing advance obtained by measuring the same conventional burst sequence; determining unit, configured to determine a cell set from the plurality of cells based on the uplink level, and the uplink level corresponding to the cell in the cell set is the same; And adjusting, according to the timing advance, an air interface clock of at least one cell in the cell set, so that all cells in the cell set are synchronized.
- the adjusting unit is specifically configured to: determine, from the set of cells, one cell as a reference cell, and the remaining cells are non-reference cells; determining a non-reference cell relative to the reference cell Time advance deviation; adjust the air interface clock of the non-reference cell according to the time advance deviation.
- the adjusting unit is specifically configured to determine a target air interface clock value based on the time advance amount; and adjust at least a cell set according to the target air interface clock value The air interface clock of a cell.
- the conventional burst sequence is a signaling frame on a speech frame or a fast associated control channel FACCH.
- an embodiment of the present invention provides a base station, including: a receiving unit, configured to receive a conventional burst sequence sent by a mobile station; and a determining unit, configured to measure a normal burst sequence to obtain an uplink level and time
- the sending unit is configured to send measurement information to the base station controller, where the measurement information includes an uplink level and a timing advance.
- the conventional burst sequence is a speech frame or a signaling frame on the FACCH.
- a system for implementing inter-cell synchronization comprising the base station controller of the first aspect and/or the base station of the second aspect.
- a fourth aspect provides a method for inter-cell synchronization, including: receiving measurement information of multiple cells, where the measurement information includes performing, by a base station, the same conventional burst sequence received by the same mobile station from each of the multiple cells. Measuring the obtained uplink level and the timing advance; determining the cell set from the plurality of cells based on the uplink level, and the uplink level corresponding to the cell in the cell set is the same; adjusting the air interface of the at least one cell in the cell set according to the timing advance A clock to synchronize all cells in the set of cells.
- the air interface clock of the at least one cell in the entire cell set includes: determining, from the set of cells, one cell as the reference cell, and the remaining cells as non-reference cells; determining a time advance deviation of the non-reference cell relative to the reference cell; Deviation, adjust the air interface clock of the non-reference cell.
- the adjusting the air interface clock of the at least one cell in the cell set according to the timing advance includes: determining the target air interface clock value based on the time advance amount And adjusting the air interface clock of at least one cell in the cell set according to the target air interface clock value.
- the conventional burst sequence is a signaling frame on a voice frame or a FACCH.
- a method for inter-cell synchronization including: receiving a conventional burst sequence transmitted by a mobile station; measuring a normal burst sequence to obtain an uplink level and a timing advance; and transmitting measurement information to the base station controller
- the measurement information includes the uplink level and the timing advance.
- the conventional burst sequence is a voice frame or a signaling frame on the FACCH.
- the method for inter-cell synchronization in the embodiment of the present invention can adjust the air interface clock of the physical cell according to the uplink level and the time advance of the conventional burst sequence, without the mobile station performing cell handover.
- high-accuracy synchronization between physical cells is achieved, and network indicators and user experience are affected by frequent cell handover.
- FIG. 1 is a schematic structural diagram of a method for inter-cell synchronization, a communication system applicable to a base station, and a base station controller according to an embodiment of the present invention
- FIG. 2 is a schematic flowchart of a method for inter-cell synchronization according to an embodiment of the present invention
- FIG. 3 is a schematic flowchart of a method for inter-cell synchronization according to another embodiment of the present invention
- Schematic block diagram of the BSC
- FIG. 5 is a schematic block diagram of an eNB according to an embodiment of the present invention.
- FIG. 6 is a schematic block diagram of a BSC according to another embodiment of the present invention.
- Figure ⁇ is a schematic block diagram of an eNB according to another embodiment of the present invention.
- GSM Global System of Mobile communication
- CDMA Code Division Multiple Access
- WCDMA Wideband Code Division Multiple Access
- General Packet Radio Service General Packet Radio Service
- LTE Long Term Evolution
- UMTS Universal Mobile Telecommunication System
- WiMAX Worldwide Interoperability for Microwave Access
- a mobile station may be referred to as a user equipment (User Equipment, called “UE"), a terminal (terminal), a mobile terminal ( Mobile Terminal), etc.
- the mobile station can communicate with one or more core networks via a Radio Access Network (“RAN"), for example, the mobile station can be a mobile phone (or “cellular” “Telephone", a computer with a mobile terminal, etc., for example, the mobile station can also be a portable, pocket, handheld, computer built-in or in-vehicle mobile device that exchanges voice and/or data with the wireless access network.
- RAN Radio Access Network
- the base station may be a base station in GSM or CDMA (Base
- BTS can also be a base station in WCDMA (NodeB, called “NB"), or it can be an evolved base station in LTE (Evolutional Node B, called “ENB or e"-NodeB”), the invention is not limited.
- the base station controller may be a BSC, RNC (Radio Network Controller, Radio Network Controller) or other communication system having a base station controller function.
- RNC Radio Network Controller, Radio Network Controller
- the communication system of Figure 1 includes base stations eNB (101a, 101b, 101c), base station controller BSC 102, and mobile station MS 103.
- eNBs 101a, 101b, 101c
- BSC 102 base station controller
- MS 103 mobile station MS 103.
- eNBs 101a, 101b, 101c
- BSC 102 base station controller
- MS 103 accesses at least one physical cell through the air interface 106.
- the present invention does not limit the number of eNBs or MSs in the communication system and the number of cells controlled by each eNB.
- physical cell 1 to physical cell 9 belong to the same logical cell.
- the physical ports of each physical cell (physical cell 1 to physical cell 9) in the same logical cell are strictly synchronized, that is, the frame numbers and time slots of each physical cell are synchronized.
- the MS needs to be commanded to perform cell handover to transmit the foregoing AB frame, which affects the user experience.
- the system does not necessarily have an MS suitable for intra-cell handover at any time.
- the time interval between inter-cell synchronization operations may be large, and the air interface clock may drift with time, resulting in poor accuracy of inter-cell synchronization.
- the MS continuously sends an NB (Normal Burst) frame to the base station.
- the base station may measure the uplink level and the time advance of the NB frame received by each cell, and the base station controller adjusts the air interface clock of the cell according to the uplink level and the time advancement to implement inter-cell synchronization. In this way, the embodiment of the present invention does not need to command the MS to specifically send an AB frame, which can improve the accuracy of the air interface synchronization of each physical cell while ensuring the user experience.
- FIG. 2 is a schematic flowchart of a method for inter-cell synchronization according to an embodiment of the present invention.
- the method 200 of Figure 2 can be performed by a BSC, such as the BSC 102 shown in Figure 1.
- the measurement information includes an uplink level and a timing advance measured by the base station to measure the same regular burst sequence received by the same mobile station from each of the multiple cells.
- the normal burst sequence is a burst sequence transmitted when the mobile station is in normal communication with the base station.
- it may be a voice frame or a signaling frame on a FACCH (Fast Associated Control Channel), or other forms of conventional communication frames.
- FACCH Fast Associated Control Channel
- the specific form of the NB frame is not limited in the embodiment of the present invention.
- the cells in the cell set have the same uplink level. Therefore, the distance between the cell and the mobile station in the cell set can be considered to be the same. Therefore, the cell in the cell set can be synchronized.
- the method for inter-cell synchronization in the embodiment of the present invention can adjust the air interface clock of the physical cell according to the uplink level and the timing advance of the conventional burst sequence in the measurement information, without the mobile station performing cell handover. Therefore, high-accuracy synchronization between physical cells is achieved, and network indicators and user experience are affected by frequent cell handover.
- the method of the embodiment of the present invention is implemented, and high-precision inter-cell synchronization can be realized.
- the method in the embodiment of the present invention is executed in the normal service process of the MS, and the eNB and the BSC measure and determine the deviation of the timing advance, and do not affect the behavior and service of the MS, thereby ensuring that the user experience is not affected.
- the method of the embodiment of the present invention can be performed at a high frequency, for example, every 480 ms, thereby reducing the influence of the air interface clock drift, each physical The cell can always be in a state of precise synchronization.
- the same uplink level means that the corresponding uplink level of each cell falls within the allowable error range, and the values of the uplink level are not required to be completely equal.
- one cell when the air interface clock of at least one cell in the cell set is adjusted according to the timing advance, one cell may be determined as a reference cell from the cell set, and the remaining cells are non-references. a cell; then, determining a time advance deviation of the non-reference cell relative to the reference cell; and finally, adjusting the air interface clock of the non-reference cell according to the time advance deviation.
- any one of the cell sets may be selected as the reference cell, and a cell with the largest, smallest, or intermediate value of the time advance may be selected as the reference cell according to a preset condition. Then, the time advance deviation of the non-reference cell relative to the reference cell is determined to adjust the air interface clock of the non-reference cell to implement inter-cell synchronization.
- the cell set is denoted as Cell . ⁇ ⁇ Cell n ) , and the corresponding time advance amount is recorded as ( ⁇ , , ⁇ , -, TAJ.
- the cell is used as the reference cell, the cell Ce ⁇ 2 , ⁇ ⁇ ⁇ , Cell n
- ⁇ ⁇ is the adjustment range when the base station controller adjusts the air interface clock of the corresponding cell.
- the target air interface clock value may also be determined based on the time advance amount; and then, according to the target air interface.
- the clock value adjusts the air interface clock of at least one cell in the cell set.
- the cell set is recorded as (C / C ⁇ , ⁇ , (3 ⁇ 4//patented), and the corresponding time advance amount is recorded as ( ⁇ , ⁇ , ⁇ , 3 ⁇ 4).
- Target air interface clock value For max, then calculate the deviation between the time advance amount of each cell and the target air interface clock value, and finally adjust the air interface clock to the corresponding cell according to the deviation.
- the method for determining the deviation can be performed according to the method described above, in order to avoid duplication. , will not repeat them here.
- FIG. 3 is a schematic flowchart of a method for inter-cell synchronization according to another embodiment of the present invention.
- the method 300 of FIG. 3 may be performed by an eNB, such as the eNB (101a, 101b, 101c) shown in FIG.
- the base station may send measurement information to the base station controller, so that the base station controller adjusts the air interface of the physical cell according to the uplink level and the timing advance of the regular burst sequence in the measurement information.
- the clock without the need for a mobile station for cell switching. This enables high-accuracy synchronization between physical cells while avoiding network metrics and user experience due to frequent cell handover.
- the method of the embodiment of the present invention is implemented, and high-precision inter-cell synchronization can be realized.
- the method in the embodiment of the present invention is executed in the normal service process of the MS, and the eNB and the BSC measure and determine the deviation of the timing advance, and do not affect the behavior and service of the MS, thereby ensuring that the user experience is not affected.
- the method of the embodiment of the present invention can be performed at a high frequency, for example, every 480 ms, thereby reducing the influence of the air interface clock drift, each physical The cell can always be in a state of precise synchronization.
- the BSC 40 of Fig. 4 includes a receiving unit 401, a determining unit 402, and an adjusting unit 403.
- the receiving unit 401 is configured to receive measurement information of multiple cells, where the measurement information includes an uplink level and a timing advance measured by the base station to measure the same regular burst sequence received by the same mobile station from each of the plurality of cells.
- the determining unit 402 is configured to determine a cell set from the plurality of cells based on the uplink level, where the uplink levels corresponding to the cells in the cell set are the same.
- the adjusting unit 403 is configured to adjust, according to the timing advance, an air interface clock of at least one cell in the cell set, so that all cells in the cell set are synchronized.
- the base station controller in the embodiment of the present invention can adjust the air interface clock of the physical cell according to the uplink level and the time advance of the regular burst sequence in the measurement information. This enables high-accuracy synchronization between physical cells while avoiding network metrics and user experience due to frequent cell handover.
- the base station controller of the embodiment of the present invention can implement high-precision inter-cell synchronization in a state where each physical cell is already in an approximate synchronization (frame number alignment).
- the base station controller in the embodiment of the present invention determines the time advance deviation in the normal business process of the MS, and does not affect the behavior and service of the MS, thereby ensuring that the user experience is not affected.
- the base station controller can perform the foregoing method at a high frequency, for example, every 480 ms, thereby reducing the influence of the air interface clock drift.
- the physical cell can always be in a state of precise synchronization.
- the same uplink level means that the corresponding uplink level of each cell falls within the allowable error range, and the values of the uplink level are not required to be completely equal.
- the adjusting unit 403 may select any one of the cell sets as the reference cell, and may also select a cell with the largest, smallest, or intermediate value of the time advance as the reference cell according to a preset condition. Then, the time advance deviation of the non-reference cell relative to the reference cell is determined to adjust the air interface clock of the non-reference cell to implement inter-cell synchronization.
- the cell set is recorded as (CeU ⁇ Cell 2 , ⁇ ⁇ , Cell , and the corresponding time advance amount is recorded as ( ⁇ , ⁇ , ⁇ , TAJ.
- the cell Ce// 2 , ⁇ ⁇ , Cell n is a non-reference cell
- ⁇ ⁇ is the adjustment range when the base station controller adjusts the air interface clock of the corresponding cell.
- the adjusting unit 403 is specifically configured to: determine, according to the timing advance, the target air interface clock value; and adjust the air interface clock of the at least one cell in the cell set according to the target air interface clock value.
- the group of cells is recorded as , and the corresponding time advance is recorded as
- the method for determining the deviation can be performed according to the method described above. To avoid repetition, no further details are provided herein.
- the conventional burst sequence is a voice frame or a signaling frame on the FACCH.
- FIG. 5 is a schematic block diagram of an eNB according to an embodiment of the present invention.
- the eNB 50 of FIG. 5 includes a receiving unit 501, a determining unit 502, and a transmitting unit 503.
- the receiving unit 501 is configured to receive a regular burst sequence sent by the mobile station.
- the determining unit 502 is configured to measure the normal burst sequence to obtain an uplink level and a timing advance.
- the sending unit 503 is configured to send measurement information to the base station controller, where the measurement information includes an uplink level and a timing advance.
- the base station in the embodiment of the present invention may send measurement information to the base station controller, so that the base station controller adjusts the air interface clock of the physical cell according to the uplink level and the timing advance of the regular burst sequence in the measurement information, and There is no need for a mobile station to perform cell handover. Thereby, high-accuracy synchronization between physical cells is achieved, and network indicators and user experience are affected by frequent cell handover.
- the base station in the embodiment of the present invention may send measurement information to the base station controller, so that the base station controller adjusts the air interface clock of the cell, so that high precision is achieved. Small interval synchronization.
- the base station of the embodiment of the present invention is in the MS Measuring the uplink level and timing advance in the normal business process does not affect the behavior and services of the MS, thus ensuring that the user experience is not affected.
- the base station can perform the foregoing method at a high frequency, for example, every 480 ms, thereby reducing the impact of the air interface clock drift, each physical cell. Can always maintain a state of precise synchronization.
- the conventional burst sequence is a voice frame or a signaling frame on the FACCH.
- the system for implementing inter-cell synchronization includes the base station controller and/or the base station described above.
- FIG. 6 is a schematic block diagram of a BSC according to another embodiment of the present invention.
- the BSC 60 includes a transmitting circuit 602, a receiving circuit 603, a processing unit 604, a memory 605, and an antenna 601.
- Processing unit 604 controls the operation of BSC 60 and can be used to process signals.
- Processing unit 604 may also be referred to as a CPU (Central Processing Unit).
- Memory 605 can include read only memory and random access memory and provides instructions and data to processor 604.
- a portion of memory 605 may also include non-volatile line random access memory (NVRAM).
- the BSC 60 may be embedded or may itself be a wireless communication device such as a mobile telephone. Transmit circuit 602 and receive circuit 603 can be coupled to antenna 601.
- bus system 609 which in addition to the data bus includes a power bus, a control bus, and a status signal bus.
- various buses are labeled as bus system 609 in the figure.
- the air interface clock of at least one cell in the cell set is adjusted to synchronize all cells in the cell set.
- the method for inter-cell synchronization in the embodiment of the present invention may adjust the air interface of the physical cell according to the uplink level and the timing advance of the regular burst sequence in the measurement information. Clock, without the need for a mobile station for cell switching. Therefore, high-accuracy synchronization between physical cells is achieved, and network indicators and user experience are affected by frequent cell handover.
- the BSC implements the method of the embodiment of the present invention in a state in which each physical cell is already in a state of approximate synchronization (frame number alignment), so that high-precision inter-cell synchronization can be realized.
- the method of the embodiment of the present invention is executed in the normal service process of the MS, and the eNB and the BSC measure and determine the deviation of the timing advance, which does not affect the behavior and service of the MS, thereby ensuring that the user experience is not affected.
- the method of the embodiment of the present invention can be performed at a high frequency, for example, every 480 ms, thereby reducing the influence of the air interface clock drift, and each physical The cell can always be in a state of precise synchronization.
- the same uplink level means that the corresponding uplink level of each cell falls within the allowable error range, and the values of the uplink level are not required to be completely equal.
- the memory 605 may also store instructions that cause the processing unit 604 to:
- the air interface clock of at least one cell in the cell set is adjusted according to the timing advance, one cell is determined as a reference cell from the cell set, and the remaining cells are non-reference cells; and then, the time advance of the non-reference cell relative to the reference cell is determined. Quantity deviation; Finally, adjust the air interface clock of the non-reference cell according to the time advance deviation.
- the memory 605 may also store instructions that cause the processing unit 604 to:
- the target air interface clock value is determined based on the time advance amount; and then, the air interface clock of at least one cell in the cell set is adjusted according to the target air interface clock value.
- the memory 605 may also store instructions that cause the processing unit 604 to:
- a conventional burst sequence is a speech frame or a signaling frame on the FACCH.
- Transmit circuit 702 and receive circuit 703 can be coupled to antenna 701.
- the various components of the eNB 70 are coupled together by a bus system 709, which in addition to the data bus includes a power bus, a control bus, and a status signal bus. However, for clarity of description, various buses are labeled as bus system 709 in the figure. Receiving a sequence of conventional bursts transmitted by the mobile station;
- the measurement information is sent to the base station controller, and the measurement information includes an uplink level and a timing advance.
- the base station may send measurement information to the base station controller, so that the base station controller adjusts the air interface clock of the physical cell according to the uplink level and the timing advance of the regular burst sequence in the measurement information.
- the eNB implements the method in the embodiment of the present invention in a state in which each physical cell is already in a state of approximate synchronization (frame number alignment), so that high-precision inter-cell synchronization can be realized.
- the method of the embodiment of the present invention is executed in the normal service process of the MS, and the eNB and the BSC measure and determine the deviation of the timing advance, which does not affect the behavior and service of the MS, thereby ensuring that the user experience is not affected.
- the method of the embodiment of the present invention can be performed at a high frequency, for example, every 480 ms, thereby reducing the influence of the air interface clock drift, and each physical The cell can always be in a state of precise synchronization.
- the memory 705 can also store instructions that cause the processing unit 704 to:
- a conventional burst sequence is a speech frame or a signaling frame on the FACCH.
- the size of the sequence numbers of the above processes does not mean the order of execution, and the order of execution of each process should be determined by its function and internal logic, and should not be taken to the embodiments of the present invention.
- the implementation process constitutes any limitation.
- the term "and/or” is merely an association describing the associated objects, indicating that there may be three relationships.
- a and / or B can mean: There are three cases where A exists separately, A and B exist at the same time, and B exists separately.
- the disclosed systems, devices, and methods may be implemented in other ways.
- the device embodiments described above are merely illustrative.
- the division of the unit is only a logical function division.
- there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not executed.
- the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, or an electrical, mechanical or other form of connection.
- the units described as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the embodiments of the present invention.
- each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
- the above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.
- the integrated unit if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium.
- the technical solution of the present invention contributes in essence or to the prior art, or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium.
- Including a number of instructions to make a computer device can be a personal computing The machine, server, or network device, etc.) performs all or part of the steps of the methods described in various embodiments of the present invention.
- the foregoing storage medium includes: a U disk, a removable hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and the like, which can store program codes. .
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Abstract
本发明公开了一种小区间同步的方法、基站、基站控制器和***。该基站控制器包括:接收单元,用于接收多个小区的测量信息,测量信息包括基站对多个小区中每个小区从同一移动台接收到的同一常规突发脉冲序列进行测量得到的上行电平和时间提前量;确定单元,用于基于上行电平,从多个小区中确定小区集合,小区集合中的小区对应的上行电平相同;调整单元,用于根据时间提前量,调整小区集合中至少一个小区的空口时钟,以使小区集合中的所有小区同步。根据测量信息中的上行电平和时间提前量,调整物理小区的空口时钟,而无需移动台进行小区切换。从而实现物理小区间较高精确度的同步,同时避免了因频繁进行小区切换而影响到网络指标和用户体验。
Description
小区间同步的方法、 基站、 基站控制器和*** 技术领域
本发明涉及通信领域, 并且更具体地, 涉及一种小区间同步的方法、 基 站、 基站控制器和***。 背景技术
多站点共小区技术是将不同站点的部分物理小区逻辑上划为同一个逻 辑小区。 例如, 原本是属于 3个站点的 9个小区, 通过多站点共小区技术, 合并成一个小区对移动台提供服务。 当移动台在这个 3个站点的覆盖区域内 进行移动的时候, 不需要进行小区间切换。 多站点共小区技术能够减少组网 带宽和用户设备的小区切换次数, 从而提升了服务质量和用户体验。
在实现多站点共小区技术的过程中, 为了能将多个站点的多个物理小区 合并成一个逻辑小区, 需要这多个物理小区的空口严格同步(帧号、 时隙都 要同步), 否则多个物理小区发送的数据就会相互干扰, 影响用户的通信业 务。 空口同步技术通常分为硬件同步和软件同步。 硬件同步需要增加 GPS ( Global Positioning System, 全球定位***) 时钟设备, 同步精度较高, 但 是成本较高。 软件同步不需要额外的时钟设备, 但是同步精度较低。
目前的空口软同步技术中, 网络侧设备向移动台发送小区内切换指令, 要求移动台从小区 A切换到小区 B; 然后, 小区 A和小区 B同时解析移动 台上报的接入请求 AB ( Access Burst, 接入突发脉沖序列)帧, 并记录各自 接收到 AB帧的时间, 上报给 BSC ( Base Station Controller, 基站控制器); 最后, BSC计算出小区 A和小区 B接收到 AB帧的时间差, 通知小区 A根 据时间差调整空口时钟。 通过不断的重复上述过程, 小区 A和小区 B实现 空口同步。
但是, 在实现上述空口同步的过程中, 需要移动台进行小区切换。 如果 频繁的进行的空口时钟调整, 就要移动台频繁地进行小区切换, 这样就会影 响网络指标和用户体验。 发明内容
本发明实施例提供了一种小区间同步的方法、基站、基站控制器和***,
能够实现较高精确度的小区同步。
第一方面, 本发明实施例提供了一种基站控制器, 包括: 接收单元, 用 于接收多个小区的测量信息, 测量信息包括基站对多个小区中每个小区从同 一移动台接收到的同一常规突发脉沖序列进行测量得到的上行电平和时间 提前量; 确定单元, 用于基于上行电平, 从多个小区中确定小区集合, 小区 集合中的小区对应的上行电平相同; 调整单元, 用于根据时间提前量, 调整 小区集合中至少一个小区的空口时钟, 以使小区集合中的所有小区同步。
结合第一方面, 在第一方面的第一种实现方式中, 调整单元具体用于, 从小区集合中确定一个小区作为基准小区, 剩余的小区为非基准小区; 确定 非基准小区相对于基准小区的时间提前量偏差; 根据时间提前量偏差, 调整 非基准小区的空口时钟。
结合第一方面及其上述实现方式, 在第一方面的第二种实现方式中, 调 整单元具体用于, 基于时间提前量, 确定目标空口时钟值; 根据目标空口时 钟值, 调整小区集合中至少一个小区的空口时钟。
结合第一方面及其上述实现方式, 在第一方面的第三种实现方式中, 常 规突发脉沖序列为语音帧或快速随路控制信道 FACCH上的信令帧。
第二方面, 本发明实施例提供了一种基站, 包括: 接收单元, 用于接收 移动台发送的常规突发脉沖序列; 确定单元, 用于对常规突发脉沖序列进行 测量得到上行电平和时间提前量; 发送单元, 用于向基站控制器发送测量信 息, 测量信息包括上行电平和时间提前量。
结合第二方面, 在第二方面的第一种实现方式中, 常规突发脉沖序列为 语音帧或 FACCH上的信令帧。
第三方面, 提供了一种实现小区间同步的***, 包括第一方面的基站控 制器和 /或第二方面的基站。
第四方面, 提供了一种小区间同步的方法, 包括: 接收多个小区的测量 信息, 测量信息包括基站对多个小区中每个小区从同一移动台接收到的同一 常规突发脉沖序列进行测量得到的上行电平和时间提前量; 基于上行电平, 从多个小区中确定小区集合, 小区集合中的小区对应的上行电平相同; 根据 时间提前量, 调整小区集合中至少一个小区的空口时钟, 以使小区集合中的 所有小区同步。
结合第四方面, 在第四方面的第一种实现方式中, 根据时间提前量, 调
整小区集合中至少一个小区的空口时钟, 包括: 从小区集合中确定一个小区 作为基准小区, 剩余的小区为非基准小区; 确定非基准小区相对于基准小区 的时间提前量偏差; 根据时间提前量偏差, 调整非基准小区的空口时钟。
结合第四方面及其上述实现方式, 在第四方面的第二种实现方式中, 根 据时间提前量, 调整小区集合中至少一个小区的空口时钟, 包括: 基于时间 提前量, 确定目标空口时钟值; 根据目标空口时钟值, 调整小区集合中至少 一个小区的空口时钟。
结合第四方面及其上述实现方式, 在第四方面的第三种实现方式中, 常 规突发脉沖序列为语音帧或 FACCH上的信令帧。
第五方面, 提供了一种小区间同步的方法, 包括: 接收移动台发送的常 规突发脉沖序列; 对常规突发脉沖序列进行测量得到上行电平和时间提前 量; 向基站控制器发送测量信息, 测量信息包括上行电平和时间提前量。
结合第五方面, 在第五方面的第一种实现方式中, 常规突发脉沖序列为 语音帧或 FACCH上的信令帧。
基于上述技术方案, 本发明实施例的小区间同步的方法可以根据常规突 发脉沖序列的上行电平和时间提前量, 调整物理小区的空口时钟, 而无需移 动台进行小区切换。 从而实现物理小区间较高精确度的同步, 同时避免了因 频繁进行小区切换而影响到网络指标和用户体验。 附图说明
为了更清楚地说明本发明实施例的技术方案, 下面将对本发明实施例中 所需要使用的附图作筒单地介绍, 显而易见地, 下面描述中的附图仅仅是本 发明的一些实施例, 对于本领域普通技术人员来讲, 在不付出创造性劳动的 前提下, 还可以根据这些附图获得其他的附图。
图 1是本发明实施例的小区间同步的方法、 基站、 基站控制器可应用的 通信***的示意性结构图;
图 2是本发明一个实施例的小区间同步的方法的示意性流程图; 图 3是本发明另一实施例的小区间同步的方法的示意性流程图; 图 4是本发明一个实施例的 BSC的示意性框图;
图 5是本发明一个实施例的 eNB的示意性框图;
图 6是本发明另一实施例的 BSC的示意性框图;
图 Ί是本发明另一实施例的 eNB的示意性框图 具体实施方式
下面将结合本发明实施例中的附图,对本发明实施例中的技术方案进行 清楚、 完整地描述, 显然, 所描述的实施例是本发明的一部分实施例, 而不 是全部实施例。 基于本发明中的实施例, 本领域普通技术人员在没有作出创 造性劳动的前提下所获得的所有其他实施例, 都应属于本发明保护的范围。
应理解, 本发明实施例的技术方案可以应用于各种通信***, 例如: 全 球移动通讯 ( Global System of Mobile communication, 筒称为 "GSM" )***、 码分多址(Code Division Multiple Access , 筒称为 "CDMA" ) ***、 宽带码 分多址( Wideband Code Division Multiple Access , 筒称为 "WCDMA" )***、 通用分组无线业务(General Packet Radio Service, 筒称为 "GPRS" )、 长期 演进(Long Term Evolution, 筒称为 "LTE" )***、 LTE频分双工( Frequency Division Duplex,筒称为 "FDD" )***、 LTE 时分双工( Time Division Duplex, 筒称为 "TDD" )、 通用移动通信***(Universal Mobile Telecommunication System,筒称为 "UMTS" ),全球互联微波接入( Worldwide Interoperability for Microwave Access , 筒称为 " WiMAX" )通信***等。
还应理解, 在本发明实施例中, 移动台 (Mobile Station, 筒称为 "MS" ) 可称之为用户设备(User Equipment, 筒称为 "UE" )、 终端( Terminal )、 移 动终端 (Mobile Terminal )等, 该移动台可以经无线接入网 (Radio Access Network, 筒称为 "RAN" )与一个或多个核心网进行通信, 例如, 移动台可 以是移动电话(或称为 "蜂窝" 电话)、 具有移动终端的计算机等, 例如, 移动台还可以是便携式、 袖珍式、 手持式、 计算机内置的或者车载的移动装 置, 它们与无线接入网交换语音和 /或数据。
在本发明实施例中, 基站可以是 GSM 或 CDMA 中的基站 (Base
Transceiver Station, 筒称为 "BTS" ), 也可以是 WCDMA中的基站( NodeB , 筒称为 "NB" ), 还可以是 LTE中的演进型基站(Evolutional Node B , 筒称 为 "ENB或 e-NodeB" ), 本发明并不限定。 基站控制器可以是 BSC、 RNC ( Radio Network Controller, 无线网络控制器)或者其它通信***中有基站 控制器功能的装置。 但为描述方便, 下述实施例将以基站 eNB、 移动台 MS 和基站控制器 BSC为例进行说明。
图 1是本发明实施例可应用的通信***的示意性结构图。 图 1的通信系 统包括基站 eNB( 101a, 101b, 101c )、基站控制器 BSC 102和移动台 MS 103。 在该通信***中, eNB ( 101a, 101b, 101c )分别通过 Abis接口 ( 104a, 104b, 104c )与 BSC 102相连, 每个 eNB控制三个物理小区(例如, 小区 1、 小区 2和小区 3 ), MS 103通过空口 106接入至少一个物理小区, 但本发明对通 信***中 eNB或 MS的数量以及每个 eNB控制的小区数量不作限定。 在图 1的例子中, 物理小区 1至物理小区 9属于同一个逻辑小区。
在实现多站点共小区的过程中,需要同一个逻辑小区内的各个物理小区 (物理小区 1至物理小区 9 ) 空口严格同步, 也就是各个物理小区帧号和时 隙都要同步。
如果根据 MS发送的 AB帧进行小区间同步, 则需要命令 MS专门进行 小区切换而发送上述 AB帧, 这会影响用户体验。
另外, ***中不一定随时都有适合进行小区内切换的 MS, 导致小区间 同步操作的时间间隔可能较大, 而空口时钟会随着时间而漂移, 导致小区间 同步的精确度变差。
在 MS与基站通信的过程中, MS不断地向基站发送 NB ( Normal Burst, 常规突发脉沖序列)帧。 本发明实施例中, 基站可以测量各个小区接收到的 NB帧的上行电平和时间提前量, 基站控制器根据上行电平和时间提前量调 整小区的空口时钟, 以实现小区间同步。 这样, 本发明实施例无需命令 MS 专门发送 AB帧, 能够在保证用户体验的同时, 提高各个物理小区空口同步 的精确度。
图 2是本发明一个实施例的小区间同步的方法的示意性流程图。 图 2的 方法 200可以由 BSC执行, 例如, 图 1所示的 BSC 102。
201 , 接收多个小区的测量信息, 测量信息包括基站对多个小区中每个 小区从同一移动台接收到的同一常规突发脉沖序列进行测量得到的上行电 平和时间提前量。
常规突发脉沖序列 (Normal Burst )是移动台与基站正常通信时发送的 突发脉沖序列。 例如可以是语音帧或 FACCH ( Fast Associated Control Channel, 快速随路控制信道) 上的信令帧等, 或者是其他形式的常规通信 帧。 本发明实施例对 NB帧的具体形式不作限制。
202, 基于上行电平, 从多个小区中确定小区集合, 小区集合中的小区
对应的上行电平相同。
小区集合中的小区对应的上行电平相同, 这样, 可以认为该小区集合中 的小区与移动台之间的距离相同, 因此可以对该小区集合中的小区进行同步 调整处理。
203 , 根据时间提前量, 调整小区集合中至少一个小区的空口时钟, 以 使小区集合中的所有小区同步。
基于上述技术方案,本发明实施例的小区间同步的方法可以根据测量信 息中的常规突发脉沖序列的上行电平和时间提前量,调整物理小区的空口时 钟, 而无需移动台进行小区切换。 从而实现物理小区间较高精确度的同步, 同时避免了因频繁进行小区切换而影响到网络指标和用户体验。
尤其, 在各个物理小区已经处于近似同步(帧号对齐)的状态下, 实施 本发明实施例的方法, 可以实现高精度的小区间同步。 本发明实施例的方法 在 MS正常业务过程中执行, eNB和 BSC测量及确定时间提前量偏差, 并 不影响 MS的行为及业务, 从而保证了不会影响用户体验。 另外, 由于 MS 与 eNB 通信过程中会不断发送常规突发脉沖序列, 因此可以高频率地执行 本发明实施例的方法, 例如每隔 480 ms执行一次, 从而减少了空口时钟漂 移的影响, 各个物理小区能够始终保持在精确同步的状态。
应理解,上行电平相同是指各个小区对应的上行电平落入容许的误差范 围内, 并非要求上行电平的数值完全相等。
可选地, 作为一个实施例, 在步骤 203中, 在根据时间提前量, 调整小 区集合中至少一个小区的空口时钟时, 可以从小区集合中确定一个小区作为 基准小区, 剩余的小区为非基准小区; 然后, 确定非基准小区相对于基准小 区的时间提前量偏差; 最后, 根据时间提前量偏差, 调整非基准小区的空口 时钟。
例如, 可以选择小区集合中的任意一个小区作为基准小区, 也可以根据 预设的条件选择时间提前量最大、 最小或处于中间数值的小区作为基准小 区。 然后, 确定非基准小区相对于基准小区的时间提前量偏差, 以调整非基 准小区的空口时钟, 实现小区间同步。
将小区集合记为 Cell . ··, Celln ) , 与其对应的时间提前量记作 (ΤΑ, , ΤΑ,, -, TAJ。如果小区 作为基准小区,小区 Ce〃2, · ··, Celln为非基准小区, 那么非基准小区 Cdl2, ' , Celln相对于基准小区 Cdk的时间提前量偏差分别为:
At12 = TA1 -TA2 , …, Atln = T -TAn
At12 , 八^即为基站控制器对相应小区的空口时钟进行调整时的调整 幅度。
可选地, 作为另一实施例, 在步骤 203中, 根据时间提前量, 调整小区 集合中至少一个小区的空口时钟时, 还可以基于时间提前量, 确定目标空口 时钟值; 然后, 根据目标空口时钟值, 调整小区集合中至少一个小区的空口 时钟。
例如, 将小区集合记为(C / C ^, ···, (¾//„) , 与其对应的时间提前量记作 (Γ^, Γ^, · ··, ¾ )。 目标空口时钟值为 = max , 然后分别计算各 个小区的时间提前量量与目标空口时钟值的偏差, 最后根据偏差对相应的小 区进行空口时钟调整, 确定偏差的方法可以按照前文所述的方法进行, 为避 免重复, 在此不再赘述。
图 3是本发明另一实施例的小区间同步的方法的示意性流程图。 图 3的 方法 300可以由 eNB执行, 例如, 图 1所示的 eNB ( 101a, 101b, 101c )。
301 , 接收移动台发送的常规突发脉沖序列。
302, 对常规突发脉沖序列进行测量得到上行电平和时间提前量。
303 , 向基站控制器发送测量信息, 测量信息包括上行电平和时间提前 量。
基于上述技术方案, 在本发明实施例中, 基站可以向基站控制器发送测 量信息, 以便于基站控制器根据测量信息中的常规突发脉沖序列的上行电平 和时间提前量, 调整物理小区的空口时钟, 而无需移动台进行小区切换。 从 而实现物理小区间较高精确度的同步, 同时避免了因频繁进行小区切换而影 响到网络指标和用户体验。
尤其, 在各个物理小区已经处于近似同步(帧号对齐)的状态下, 实施 本发明实施例的方法, 可以实现高精度的小区间同步。 本发明实施例的方法 在 MS正常业务过程中执行, eNB和 BSC测量及确定时间提前量偏差, 并 不影响 MS的行为及业务, 从而保证了不会影响用户体验。 另外, 由于 MS 与 eNB 通信过程中会不断发送常规突发脉沖序列, 因此可以高频率地执行 本发明实施例的方法, 例如每隔 480 ms执行一次, 从而减少了空口时钟漂 移的影响, 各个物理小区能够始终保持在精确同步的状态。
可选地, 作为一个实施例, 常规突发脉沖序列为语音帧或 FACCH上的
信令帧。
图 4是本发明一个实施例的 BSC的示意性框图。 图 4的 BSC 40包括接 收单元 401、 确定单元 402和调整单元 403。
接收单元 401 , 用于接收多个小区的测量信息, 测量信息包括基站对多 个小区中每个小区从同一移动台接收到的同一常规突发脉沖序列进行测量 得到的上行电平和时间提前量。
确定单元 402, 用于基于上行电平, 从多个小区中确定小区集合, 小区 集合中的小区对应的上行电平相同。
调整单元 403 , 用于根据时间提前量, 调整小区集合中至少一个小区的 空口时钟, 以使小区集合中的所有小区同步。
基于上述技术方案,本发明实施例的基站控制器可以根据测量信息中的 常规突发脉沖序列的上行电平和时间提前量, 调整物理小区的空口时钟。 从 而实现物理小区间较高精确度的同步, 同时避免了因频繁进行小区切换而影 响到网络指标和用户体验。
尤其, 在各个物理小区已经处于近似同步(帧号对齐)的状态下, 本发 明实施例的基站控制器, 可以实现高精度的小区间同步。 本发明实施例的基 站控制器在 MS正常业务过程中确定时间提前量偏差, 并不影响 MS的行为 及业务, 从而保证了不会影响用户体验。 另外, 由于 MS与 eNB通信过程中 会不断发送常规突发脉沖序列, 因此基站控制器可以高频率地执行前文描述 的方法, 例如每隔 480 ms执行一次, 从而减少了空口时钟漂移的影响, 各 个物理小区能够始终保持在精确同步的状态。
应理解,上行电平相同是指各个小区对应的上行电平落入容许的误差范 围内, 并非要求上行电平的数值完全相等。
可选地, 作为一个实施例, 调整单元 403具体用于, 从小区集合中确定 一个小区作为基准小区, 剩余的小区为非基准小区; 确定非基准小区相对于 基准小区的时间提前量偏差; 根据时间提前量偏差, 调整非基准小区的空口 时钟。
例如,调整单元 403可以选择小区集合中的任意一个小区作为基准小区, 也可以根据预设的条件选择时间提前量最大、最小或处于中间数值的小区作 为基准小区。 然后, 确定非基准小区相对于基准小区的时间提前量偏差, 以 调整非基准小区的空口时钟, 实现小区间同步。
将小区集合记为 (CeU^ Cell2, · ··, Cell , 与其对应的时间提前量记作 (ΓΑ, Τ^, ···, TAJ。如果小区 作为基准小区,小区 Ce//2, · ··, Celln为非基准小区, 那么非基准小区 C¾//2, ···, Celln相对于基准小区 Cd^的时间提前量偏差分别为: At12 = ΤΑι - ΤΑ2 , …, Atln = TAl - TAn
At12 , 八^即为基站控制器对相应小区的空口时钟进行调整时的调整 幅度。
可选地, 作为另一实施例, 调整单元 403具体用于, 基于时间提前量, 确定目标空口时钟值; 根据目标空口时钟值, 调整小区集合中至少一个小区 的空口时钟。
例如, 将小区集合记为 , 与其对应的时间提前量记作
(ΓΛ, Γ^, ···, ¾ )。 目标空口时钟值为 = 11^ {7¾1, 7 , ···, :¾„} , 然后分别计算各 个小区的时间提前量量与目标空口时钟值的偏差, 最后根据偏差对相应的小 区进行空口时钟调整, 确定偏差的方法可以按照前文所述的方法进行, 为避 免重复, 在此不再赘述。
可选地, 作为另一实施例, 常规突发脉沖序列为语音帧或 FACCH上的 信令帧。
图 5是本发明一个实施例的 eNB的示意性框图。 图 5的 eNB 50包括接 收单元 501、 确定单元 502和发送单元 503。
接收单元 501 , 用于接收移动台发送的常规突发脉沖序列。
确定单元 502, 用于对常规突发脉沖序列进行测量得到上行电平和时间 提前量。
发送单元 503 , 用于向基站控制器发送测量信息, 测量信息包括上行电 平和时间提前量。
基于上述技术方案,本发明实施例的基站可以向基站控制器发送测量信 息, 以便基站控制器根据测量信息中的常规突发脉沖序列的上行电平和时间 提前量, 调整物理小区的空口时钟, 而无需移动台进行小区切换。 从而实现 物理小区间较高精确度的同步, 同时避免了因频繁进行小区切换而影响到网 络指标和用户体验。
尤其, 在各个物理小区已经处于近似同步(帧号对齐)的状态下, 本发 明实施例的基站可以向基站控制器发送测量信息, 以便于基站控制器调整小 区的空口时钟, 从而实现高精度的小区间同步。 本发明实施例的基站在 MS
正常业务过程中测量上行电平和时间提前量, 并不影响 MS的行为及业务, 从而保证了不会影响用户体验。另外, 由于 MS与 eNB通信过程中会不断发 送常规突发脉沖序列, 因此基站可以高频率地执行前文描述的方法, 例如每 隔 480 ms执行一次, 从而减少了空口时钟漂移的影响, 各个物理小区能够 始终保持在精确同步的状态。
可选地, 作为另一实施例, 常规突发脉沖序列为语音帧或 FACCH上的 信令帧。
可选地, 作为另一实施例, 实现小区间同步的***包括前文描述的基站 控制器和 /或基站。
图 6是本发明另一实施例的 BSC的示意性框图。 施例中, BSC 60包括发射电路 602、 接收电路 603、 处理单元 604、 存储器 605及天线 601。 处理单元 604控制 BSC 60的操作, 并且可用于处理信号。 处理单元 604还可以称为 CPU ( Central Processing Unit, 中央处理单元)。 存 储器 605可以包括只读存储器和随机存取存储器, 并向处理器 604提供指令 和数据。 存储器 605 的一部分还可以包括非易失行随机存取存储器 ( NVRAM )。 具体的应用中, BSC 60可以嵌入或者本身可以就是例如移动 电话之类的无线通信设备。 发射电路 602和接收电路 603 可以耦合到天线 601。 BSC 60的各个组件通过总线*** 609耦合在一起, 其中总线*** 609 除包括数据总线之外, 还包括电源总线、 控制总线和状态信号总线。 但是为 了清楚说明起见, 在图中将各种总线都标为总线*** 609。 接收多个小区的测量信息, 测量信息包括基站对多个小区中每个小区从 同一移动台接收到的同一常规突发脉沖序列进行测量得到的上行电平和时 间提前量;
基于上行电平, 从多个小区中确定小区集合, 小区集合中的小区对应的 上行电平相同;
根据时间提前量, 调整小区集合中至少一个小区的空口时钟, 以使小区 集合中的所有小区同步。
基于上述技术方案,本发明实施例的小区间同步的方法可以根据测量信 息中的常规突发脉沖序列的上行电平和时间提前量,调整物理小区的空口时
钟, 而无需移动台进行小区切换。 从而实现物理小区间较高精确度的同步, 同时避免了因频繁进行小区切换而影响到网络指标和用户体验。
尤其, 在各个物理小区已经处于近似同步(帧号对齐) 的状态下, BSC 实施本发明实施例的方法, 可以实现高精度的小区间同步。 本发明实施例的 方法在 MS正常业务过程中执行, eNB和 BSC测量及确定时间提前量偏差, 并不影响 MS 的行为及业务, 从而保证了不会影响用户体验。 另外, 由于 MS与 eNB通信过程中会不断发送常规突发脉沖序列, 因此可以高频率地执 行本发明实施例的方法, 例如每隔 480 ms执行一次, 从而减少了空口时钟 漂移的影响, 各个物理小区能够始终保持在精确同步的状态。
应理解,上行电平相同是指各个小区对应的上行电平落入容许的误差范 围内, 并非要求上行电平的数值完全相等。
可选地, 作为一个实施例, 存储器 605还可存储使得处理单元 604执行 以下操作的指令:
在根据时间提前量, 调整小区集合中至少一个小区的空口时钟时, 从小 区集合中确定一个小区作为基准小区, 剩余的小区为非基准小区; 然后, 确 定非基准小区相对于基准小区的时间提前量偏差; 最后, 根据时间提前量偏 差, 调整非基准小区的空口时钟。
可选地, 作为另一实施例, 存储器 605还可存储使得处理单元 604执行 以下操作的指令:
在根据时间提前量, 调整小区集合中至少一个小区的空口时钟时, 基于 时间提前量, 确定目标空口时钟值; 然后, 根据目标空口时钟值, 调整小区 集合中至少一个小区的空口时钟。
可选地, 作为另一实施例, 存储器 605还可存储使得处理单元 604执行 以下操作的指令:
常规突发脉沖序列为语音帧或 FACCH上的信令帧。
图 7是本发明另一实施例的 eNB的示意性框图。 施例中, eNB 70包括发射电路 702、 接收电路 703、 处理单元 704、 存储器 705及天线 701。 处理单元 704控制 eNB 70的操作, 并且可用于处理信号。 处理单元 704还可以称为 CPU ( Central Processing Unit, 中央处理单元)。 存 储器 705可以包括只读存储器和随机存取存储器, 并向处理器 704提供指令
和数据。 存储器 705 的一部分还可以包括非易失行随机存取存储器 ( NVRAM )。 具体的应用中, eNB 70可以嵌入或者本身可以就是例如移动 电话之类的无线通信设备。 发射电路 702和接收电路 703 可以耦合到天线 701。 eNB 70的各个组件通过总线*** 709耦合在一起, 其中总线*** 709 除包括数据总线之外, 还包括电源总线、 控制总线和状态信号总线。 但是为 了清楚说明起见, 在图中将各种总线都标为总线*** 709。 接收移动台发送的常规突发脉沖序列;
对常规突发脉沖序列进行测量得到上行电平和时间提前量;
向基站控制器发送测量信息, 测量信息包括上行电平和时间提前量。 基于上述技术方案, 在本发明实施例中, 基站可以向基站控制器发送测 量信息, 以便基站控制器根据测量信息中的常规突发脉沖序列的上行电平和 时间提前量, 调整物理小区的空口时钟, 而无需移动台进行小区切换。 从而 实现物理小区间较高精确度的同步, 同时避免了因频繁进行小区切换而影响 到网络指标和用户体验。
尤其, 在各个物理小区已经处于近似同步(帧号对齐) 的状态下, eNB 实施本发明实施例的方法, 可以实现高精度的小区间同步。 本发明实施例的 方法在 MS正常业务过程中执行, eNB和 BSC测量及确定时间提前量偏差, 并不影响 MS 的行为及业务, 从而保证了不会影响用户体验。 另外, 由于 MS与 eNB通信过程中会不断发送常规突发脉沖序列, 因此可以高频率地执 行本发明实施例的方法, 例如每隔 480 ms执行一次, 从而减少了空口时钟 漂移的影响, 各个物理小区能够始终保持在精确同步的状态。
可选地, 作为一个实施例, 存储器 705还可存储使得处理单元 704执行 以下操作的指令:
常规突发脉沖序列为语音帧或 FACCH上的信令帧。
应理解, 在本发明的各种实施例中, 上述各过程的序号的大小并不意味 着执行顺序的先后, 各过程的执行顺序应以其功能和内在逻辑确定, 而不应 对本发明实施例的实施过程构成任何限定。
还应理解, 在本发明实施例中, 术语 "和 /或"仅仅是一种描述关联对象 的关联关系, 表示可以存在三种关系。 例如, A和 /或 B, 可以表示: 单独存 在 A, 同时存在 A和 B, 单独存在 B这三种情况。 另外, 本文中字符 "/" ,
一般表示前后关联对象是一种 "或" 的关系。
本领域普通技术人员可以意识到, 结合本文中所公开的实施例描述的各 示例的单元及算法步骤, 能够以电子硬件、 计算机软件或者二者的结合来实 现, 为了清楚地说明硬件和软件的可互换性, 在上述说明中已经按照功能一 般性地描述了各示例的组成及步骤。这些功能究竟以硬件还是软件方式来执 行, 取决于技术方案的特定应用和设计约束条件。 专业技术人员可以对每个 特定的应用来使用不同方法来实现所描述的功能,但是这种实现不应认为超 出本发明的范围。
所属领域的技术人员可以清楚地了解到, 为了描述的方便和筒洁, 上述 描述的***、 装置和单元的具体工作过程, 可以参考前述方法实施例中的对 应过程, 在此不再赘述。
在本申请所提供的几个实施例中, 应该理解到, 所揭露的***、 装置和 方法, 可以通过其它的方式实现。 例如, 以上所描述的装置实施例仅仅是示 意性的, 例如, 所述单元的划分, 仅仅为一种逻辑功能划分, 实际实现时可 以有另外的划分方式, 例如多个单元或组件可以结合或者可以集成到另一个 ***, 或一些特征可以忽略, 或不执行。 另外, 所显示或讨论的相互之间的 耦合或直接耦合或通信连接可以是通过一些接口、装置或单元的间接耦合或 通信连接, 也可以是电的, 机械的或其它的形式连接。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的,作 为单元显示的部件可以是或者也可以不是物理单元, 即可以位于一个地方, 或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或 者全部单元来实现本发明实施例方案的目的。
另外, 在本发明各个实施例中的各功能单元可以集成在一个处理单元 中, 也可以是各个单元单独物理存在, 也可以是两个或两个以上单元集成在 一个单元中。 上述集成的单元既可以采用硬件的形式实现, 也可以采用软件 功能单元的形式实现。
所述集成的单元如果以软件功能单元的形式实现并作为独立的产品销 售或使用时, 可以存储在一个计算机可读取存储介质中。 基于这样的理解, 本发明的技术方案本质上或者说对现有技术做出贡献的部分, 或者该技术方 案的全部或部分可以以软件产品的形式体现出来,该计算机软件产品存储在 一个存储介质中, 包括若干指令用以使得一台计算机设备(可以是个人计算
机, 服务器, 或者网络设备等)执行本发明各个实施例所述方法的全部或部 分步骤。 而前述的存储介质包括: U盘、 移动硬盘、 只读存储器(ROM, Read-Only Memory )、 随机存取存储器 ( RAM, Random Access Memory )、 磁碟或者光盘等各种可以存储程序代码的介质。
以上所述, 仅为本发明的具体实施方式, 但本发明的保护范围并不局限 于此, 任何熟悉本技术领域的技术人员在本发明揭露的技术范围内, 可轻易 想到各种等效的修改或替换, 这些修改或替换都应涵盖在本发明的保护范围 之内。 因此, 本发明的保护范围应以权利要求的保护范围为准。
Claims
1、 一种基站控制器, 其特征在于, 包括:
接收单元, 用于接收多个小区的测量信息, 所述测量信息包括基站对所 述多个小区中每个小区从同一移动台接收到的同一常规突发脉沖序列进行 测量得到的上行电平和时间提前量;
确定单元, 用于基于所述上行电平, 从所述多个小区中确定小区集合, 所述小区集合中的小区对应的上行电平相同;
调整单元, 用于根据所述时间提前量, 调整所述小区集合中至少一个小 区的空口时钟, 以使所述小区集合中的所有小区同步。
2、 根据权利要求 1所述的基站控制器, 其特征在于, 所述调整单元具 体用于从所述小区集合中确定一个小区作为基准小区, 剩余的小区为非基准 小区; 确定所述非基准小区相对于所述基准小区的时间提前量偏差; 根据所 述时间提前量偏差, 调整所述非基准小区的空口时钟。
3、 根据权利要求 1所述的基站控制器, 其特征在于, 所述调整单元具 体用于基于所述时间提前量, 确定目标空口时钟值; 根据所述目标空口时钟 值, 调整所述小区集合中至少一个小区的空口时钟。
4、 根据权利要求 1至 3任一项所述的基站控制器, 其特征在于, 所述 常规突发脉沖序列为语音帧或快速随路控制信道 FACCH上的信令帧。
5、 一种基站, 其特征在于, 包括:
接收单元, 用于接收移动台发送的常规突发脉沖序列;
确定单元,用于对所述常规突发脉沖序列进行测量得到上行电平和时间 提前量;
发送单元, 用于向基站控制器发送测量信息, 所述测量信息包括所述上 行电平和所述时间提前量。
6、 根据权利要求 5所述的基站, 其特征在于, 所述常规突发脉沖序列 为语音帧或快速随路控制信道 FACCH上的信令帧。
7、 一种实现小区间同步的***, 其特征在于, 包括:
根据权利要求 1 至 4任一项所述的基站控制器, 和 /或根据权利要求 5 或 6所述的基站。
8、 一种小区间同步的方法, 其特征在于, 包括:
接收多个小区的测量信息, 所述测量信息包括基站对所述多个小区中每
个小区从同一移动台接收到的同一常规突发脉沖序列进行测量得到的上行 电平和时间提前量;
基于所述上行电平, 从所述多个小区中确定小区集合, 所述小区集合中 的小区对应的上行电平相同;
根据所述时间提前量, 调整所述小区集合中至少一个小区的空口时钟, 以使所述小区集合中的所有小区同步。
9、 根据权利要求 8所述的方法, 其特征在于, 所述根据所述时间提前 量, 调整所述小区集合中至少一个小区的空口时钟, 包括:
从所述小区集合中确定一个小区作为基准小区, 剩余的小区为非基准小 区;
确定所述非基准小区相对于所述基准小区的时间提前量偏差; 根据所述时间提前量偏差, 调整所述非基准小区的空口时钟。
10、 根据权利要求 8所述的方法, 其特征在于, 所述根据所述时间提前 量, 调整所述小区集合中至少一个小区的空口时钟, 包括:
基于所述时间提前量, 确定目标空口时钟值;
根据所述目标空口时钟值,调整所述小区集合中至少一个小区的空口时 钟。
11、 根据权利要求 8至 10中任一项所述的方法, 其特征在于, 所述常 规突发脉沖序列为语音帧或快速随路控制信道 FACCH上的信令帧。
12、 一种小区间同步的方法, 其特征在于, 包括:
接收移动台发送的常规突发脉沖序列;
对所述常规突发脉沖序列进行测量得到上行电平和时间提前量; 向基站控制器发送测量信息, 所述测量信息包括所述上行电平和所述时 间提前量。
13、 根据权利要求 12所述的方法, 其特征在于, 所述常规突发脉沖序 列为语音帧或快速随路控制信道 FACCH上的信令帧。
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