WO2014008634A1 - 小区标识的冲突检测方法和冲突检测装置 - Google Patents
小区标识的冲突检测方法和冲突检测装置 Download PDFInfo
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- WO2014008634A1 WO2014008634A1 PCT/CN2012/078438 CN2012078438W WO2014008634A1 WO 2014008634 A1 WO2014008634 A1 WO 2014008634A1 CN 2012078438 W CN2012078438 W CN 2012078438W WO 2014008634 A1 WO2014008634 A1 WO 2014008634A1
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- 230000003993 interaction Effects 0.000 claims abstract description 48
- 238000000034 method Methods 0.000 claims abstract description 34
- 230000011664 signaling Effects 0.000 claims description 35
- 238000004891 communication Methods 0.000 claims description 9
- 238000010295 mobile communication Methods 0.000 claims description 5
- 230000007774 longterm Effects 0.000 claims description 3
- 230000002452 interceptive effect Effects 0.000 claims 7
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/16—Discovering, processing access restriction or access information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/02—Arrangements for optimising operational condition
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
- H04W76/11—Allocation or use of connection identifiers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
- H04W76/19—Connection re-establishment
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
Definitions
- Embodiments of the present invention relate to the field of wireless communications, and more particularly, to a collision detection method and a collision detection apparatus for cell identification. Background technique
- a radio access network is typically composed of multiple cells of multiple base stations. Each cell needs a unique "cell identity" in the air interface for identification by the UE (User Equipment). For example, GSM (Global System of Mobile Communication) allocates a BSIC (Base Station Identity Code) for each cell, and each cell in the UMTS (Universal Mobile Telecommunications System) is configured. PSC (Primary Scrambling Code), each cell in the LTE is configured with a Physical Cell Identity (PC), which is an air interface used to identify the "cell identity" of the cell. In mobility management, the target cell selection for handover is performed by this "cell identity".
- PC Physical Cell Identity
- Neighboring cells need to be configured with different cell IDs. Otherwise, the downlink interference will be aggravated and the switching will be affected. In severe cases, the call will be dropped.
- the number of cell identifiers is usually limited. For example, there are only 512 PSCs in UMTS and only 504 PCIs in LTE. When the number of cells is large, the cell identifier needs to be reused, that is, the same cell identifier is used for multiple cells, but the cells with the same cell identity need to be isolated as much as possible during network planning to avoid cell identity conflicts when they are adjacent. .
- the cell information reported by the UE (for example, the measurement report, or the target cell in the handover signaling) is compared with the configured neighbor list to obtain a possible cell identity conflict.
- the method depends on the cell information and the neighboring cell list reported by the UE. If the neighboring cell list of the two cells using the same cell identity does not intersect or the UE does not trigger the cell information reporting operation, the cell identity conflict detection cannot be performed. Summary of the invention
- Embodiments of the present invention provide a cell identity conflict detection method and a conflict detection apparatus, which are capable of The cell identity conflict is detected without relying on the neighboring cell list and the cell information reporting operation of the user equipment.
- a method for detecting a cell identity conflict including: determining that a user equipment accesses a first cell at a first time point T1 or performs connection establishment or connection reestablishment in a first cell; Whether the other cell has the interaction information related to the user equipment in the vicinity of the first time point T1, the interaction information is used to record the last contact information between the user equipment and other cells; When there is interaction information related to the user equipment near a time point T1, cell identity collision detection is performed on the first cell and the second cell.
- a collision detection apparatus for a cell identifier including: a determining unit, configured to determine that a user equipment accesses a first cell at a first time point T1 or performs connection establishment or connection reestablishment in a first cell; a unit, configured to search for, in the vicinity of the first time point T1, the interaction information related to the user equipment, and the interaction information is used to record the last contact information between the user equipment and other cells; And a unit, configured to perform cell identity conflict detection on the first cell and the second cell when the search unit searches for the second cell in the other cell to have the interaction information related to the user equipment in the vicinity of the first time point T1.
- the embodiment of the present invention searches for whether the user equipment has interaction information in other cells near the time point of access, connection establishment, or connection reestablishment of a cell, and performs cell identity conflict detection on the cell and other cells that have searched for the interaction information.
- the cell information reporting operation of the neighboring cell list and the user equipment is not relied on, thereby improving the detection efficiency of the cell identity conflict.
- FIG. 1 is a schematic diagram of a cell identity conflict scenario in which an embodiment of the present invention is applicable.
- FIG. 2 is a flow chart of a method for detecting a cell identity conflict according to an embodiment of the present invention.
- FIG. 3 is a schematic flowchart of a cell identity conflict detection process according to another embodiment of the present invention.
- 4 is a block diagram of a cell identity collision detecting apparatus according to an embodiment of the present invention. detailed description
- the technical solution of the present invention can be applied to various communication systems, for example: GSM, Code Division Multiple Access (CDMA), Wideband Code Division Multiple Access (WCDMA), general packet Wireless Service (GPRS, General Packet Radio Service), Long Term Evolution (LTE), etc.
- GSM Global System for Mobile Communications
- CDMA Code Division Multiple Access
- WCDMA Wideband Code Division Multiple Access
- GPRS General Packet Radio Service
- LTE Long Term Evolution
- a user equipment which may also be called a mobile terminal (Mobile Terminal), a mobile user equipment, etc., may communicate with one or more core networks via a radio access network (eg, RAN, Radio Access Network).
- the user equipment may be a mobile terminal, such as a mobile phone (or "cellular" phone) and a computer with a mobile terminal, for example, a mobile device that can be portable, pocket, handheld, computer built, or in-vehicle,
- the wireless access network exchanges languages and/or data.
- FIG. 1 is a schematic diagram of a cell identity conflict scenario in which an embodiment of the present invention is applicable.
- FIG. 1 is a schematic diagram of a cell identity conflict scenario in which an embodiment of the present invention is applicable.
- the two cells A and B in which the cell identity conflict occurs are shown in FIG. 1, but the number of cells in which the cell identity conflict occurs is not limited in the embodiment of the present invention.
- Embodiments of the invention may be similarly applied to more cells.
- Embodiments of the present invention can be used to detect any cell eight and: 8 in which a "cell identity" collision occurs.
- cell B of Figure 1 contains shaded areas, and the dashed box schematically represents a partial neighborhood of cell A or B.
- the following coverage and same coverage scenarios may be formed: A and B cells have the same cell identity; usually, the physical distance between the A and B cells is relatively long; in addition, the neighbor list of A and the neighbor list of B may not have Intersection; Moreover, A and B cells have overlapping coverage areas, as shown in the shaded area of FIG. 1, UEs in this area are more prone to handover failure or dropped calls. In this scenario, the handover failure or the dropped call caused by the cell identity conflict is very concealed, and it is difficult to locate such a cell identity conflict problem in the prior art.
- the cell identity conflict detection is performed according to the manner in which the UE triggers the measurement report and the neighboring cell list
- the existing technology cannot be used to associate through the third-party cell.
- the A and B cells are close to each other or there is a cell identity conflict; on the other hand, when the UE does not trigger the measurement report, the error block may be transmitted due to interference, and the call is dropped when it is severe.
- the severity of the consequences that may be generated by the scenario described above is related to the relative signal strength of each cell in the same coverage area of the A and B cells. If there is no dominant cell in the same coverage area and the interference is severe, a dropped call may occur. If there is a dominant cell in the same coverage area, it will affect the user throughput rate and affect the cell capacity.
- FIG. 2 is a flow chart of a method for detecting a cell identity conflict according to an embodiment of the present invention.
- the method of Figure 2 may be performed by any suitable means, such as by a network element such as a base station, base station controller or network side server, or by a processing device independent of the communication network.
- the user equipment When the user equipment attempts to access, perform connection establishment or connection reestablishment, it sends corresponding signaling.
- the time point corresponding to the signaling may be recorded, for example, a time point at which the network side device (such as a base station, a base station controller, etc.) receives the signaling, as the first time point T1.
- the time point near the first time point T1 means that the time value separated from T1 is less than or equal to the predetermined threshold value, that is, it should satisfy D-! ! ⁇ Ding + ⁇ .
- the predetermined threshold values 1 and 1 are non-negative numbers, and the two may be equal or unequal.
- the predetermined threshold can be set according to one or more factors. For example, the predetermined threshold may be related to the moving speed of the UE in the cell. If there are more UEs moving at high speed in the cell, the predetermined threshold may be set smaller to make it impossible for the high-speed UE to be at the predetermined gate.
- the time limit spans one cell, and is generally greater than one.
- the predetermined threshold may be related to a cell coverage radius. If the cell coverage radius is small, the predetermined threshold may be set to be smaller to make it impossible for the UE to span within the predetermined threshold period. One district.
- the predetermined threshold may be related to the distance between the two cells. If the cell distance is relatively close, the predetermined threshold may be set to be smaller to make the UE impossible to be in the predetermined threshold. The coverage from one cell to the coverage of another cell. Embodiments of the invention are not limited to the above. Alternatively, the setting of the predetermined threshold may also consider the clock skew between the two network side devices.
- the predetermined threshold value of the embodiment of the present invention is generally on the order of minutes, for example, 2 minutes or less.
- the “cell identifier” in the embodiment of the present invention is an identifier that is configured to the cell for the user equipment to identify the cell when performing network planning, and the same “cell identifier” may be used for multiple cells.
- it may be a BSIC in GSM, a PSC in UMTS, or a PCI in an LTE system.
- the embodiment of the present invention searches for whether the user equipment has interaction information in other cells near the time point of access, connection establishment, or connection reestablishment of a cell, and performs cell identity conflict detection on the cell and other cells that have searched for the interaction information.
- the cell information reporting operation of the neighboring cell list and the user equipment is not relied on, thereby improving the detection efficiency of the cell identity conflict.
- the method of Figure 2 can be performed in real time, for example by a network element such as a base station, a base station controller or a network side server, during communication of the user equipment.
- the method of Figure 2 may be performed in non-real time, e.g., after collecting interaction information for each cell over a period of time, by a processing device independent of the communication network.
- the embodiment of the present invention does not limit the execution subject and execution manner of the method of FIG. 2.
- the distances between cells A and B are relatively far.
- a UE is less likely to move from the planned cell A coverage to the planned cell B coverage within a predetermined threshold time. If the same UE is associated with the air interface interactions of cells A and B (for example, there is continuity or overlap in the interaction), the cells A and B should be neighboring cells, or have the same coverage area.
- the embodiment of the present invention first determines that the same UE has an association between two cells A and B at the same time or a short time interval, thereby determining whether to trigger the cell identity conflict detection processing, so that the UE does not need to rely on the measurement report and the neighbor list of the UE.
- the cell identification conflict detection process may be triggered according to an embodiment of the present invention, thereby improving detection efficiency.
- FIG. 3 is a schematic flow chart of a cell identity conflict detection process according to another embodiment of the present invention.
- the first cell is the cell A shown in FIG. 1
- the second cell is the cell B shown in FIG. 1, but the embodiment of the present invention does not limit this.
- the first cell A is at a first time point T1, and a UE attempts to access or perform connection establishment or connection reestablishment.
- the network side device of the first cell A receives the UE to try to access at T1.
- Related signaling such as RRC (Radio Resource Control) CONNECT REQ (RRC Connection Request) message in UMTS.
- the network side device of the first cell A receives the relevant signaling of the UE attempting to restore the original signaling connection at T1, such as CELL UPDATE message in UMTS or RRC RE-ESTABLISHMENT REQ in LTE (RRC reconstruction) Request) message, etc.
- the UE identifier or the signaling connection identifier corresponding to the related signaling of re-accessing or attempting to restore the original signaling connection may be set to "RETRY-OR-RECON-UE-ID"
- UE identifier may include but It is not limited to TMSI (Temporary Mobile Subscriber Identity), IMSI (International Mobile Subscriber Identity), IMEI (International Mobile Equipment Identity), etc.
- signaling connection identifier may include but not It is limited to RNTI (Radio Network Temporary Identifier), link identifier, and the like.
- the foregoing last contact information includes a last signaling or data that is exchanged between the UE and other cells, and a second time point T2 corresponding to the last signaling or data (for example, a network side device) The point in time at which the last signal or data was received).
- T1- ⁇ ⁇ ⁇ 2 ⁇ ⁇ 1 + ⁇ ⁇ 2 it may be determined that the cell corresponding to the interaction information is the second cell, where ⁇ ⁇ 1 and ⁇ ⁇ 2 are predetermined threshold values.
- ⁇ ⁇ 1 and ⁇ ⁇ 2 are predetermined threshold values.
- ⁇ ⁇ 1 and ⁇ ⁇ 2 may or may not be equal.
- the setting of ⁇ ⁇ 1 and ⁇ ⁇ 2 may take into account one or more factors, which are not limited in the embodiment of the present invention.
- ⁇ ⁇ 1 and ⁇ ⁇ 2 may take into account the clock skew of the two network side devices, etc.
- ⁇ ⁇ 1 or ⁇ ⁇ 2 may also consider other factors, such as the maximum time required for the user equipment to move between the two cells, etc. .
- the last signaling or data herein may include at least one of the following: last uplink signaling or uplink data, last uplink SINR (Signal to Interference plus Noise Ratio) or RSRP (Reference) Signal Receiving Power, reference signal received power), the last HARQ (Hybrid Automatic Repeat Request) feedback.
- the last uplink data may be the correct or incorrect uplink data of the last CRC (Cyclic Redundancy Check), which is not limited in this embodiment of the present invention.
- the foregoing last signaling may be effective signaling or invalid signaling, which is not limited by the embodiment of the present invention.
- the last contact information recorded in the interaction information may include the
- the third time point T3 of the RRC connection release between the UE and other cells At this time, if it meets ⁇ 3-
- ⁇ ⁇ 3 ⁇ ⁇ ⁇ 3+ ⁇ ⁇ 4 then it can be determined that the cell corresponding to the interaction information is the second cell, where ⁇ ⁇ 3 and ⁇ ⁇ 4 are predetermined threshold values. ⁇ ⁇ 3 and ⁇ ⁇ 4 may or may not be equal. The setting of ⁇ ⁇ 3 and ⁇ ⁇ 4 may take one or more factors into consideration, which is not limited in the embodiment of the present invention.
- ⁇ ⁇ 3 and ⁇ ⁇ 4 may take into account the clock skew of the two network side devices, etc., in addition, ⁇ ⁇ 3 or ⁇ ⁇ 4 may also consider other factors, such as the maximum time required for the user equipment to move between the two cells, The delay in releasing the user in the specific implementation of the network side, and the like.
- the last contact information recorded in the interaction information may further include a UE identifier (device identifier or user identifier) or a signaling connection identifier, such as a TMSI, an IMSL IMEI, an RNTI, or a link identifier, etc., to be set in step 301. "RETRY-OR-RECON-UE-ID" for comparison.
- the last contact information may also include an identification of the RRC connection between the UE and other cells.
- Examples of the identifier of the RRC connection include, but are not limited to, C-RNTK Cell RNTI in LTE, Cell RNTI) or S1-AP ID (SI Application Protocol Identifier;), U-RNTI in WCDMA (Universal RNTI;
- the RN connection identifier is not limited in the embodiment of the present invention.
- step 302 If the matching information is not detected in step 302, for example, although the interaction information of the UE exists in other cells, the corresponding time point of the interaction information is not near T1, or although other cells have interaction information of other user equipments, The identity of these user equipments is not "RETRY-OR-RECON-UE-ID", then it is determined that there is no cell identity conflict, and the processing is performed according to the normal process.
- the UE may be the initial access, or the connection establishment or connection re-establishment process of the UE is caused by the non-cell identity conflict.
- the identification information of the cell A may be recorded in the interaction information, including but not limited to the Evolved-Universal Terrestrial Radio Access Network (Cell Global Identifier), for the cell identification conflict detection of other cells. It is used to determine that the interaction information belongs to the cell A, and subsequently acquires information such as a frequency point and a cell identity through the ECGI when detecting whether the cell identity conflicts.
- Cell Global Identifier Evolved-Universal Terrestrial Radio Access Network
- step 302 search for the matching interaction information, and assume the searched interaction letter.
- the cell corresponding to the interest is the second cell B.
- the cell B may be determined by the ECGI of the cell B recorded in the interaction information, and information such as the frequency point and the cell identifier of the cell B may be acquired.
- Step 306 determine whether the frequency points of the A and B cells are the same.
- the frequency of the cell is generally the central frequency configuration of the cell, but the embodiment of the present invention does not limit this. If the frequency of the A and B cells is different, it may be a normal network planning scenario, because the inter-frequency cell can allow the same identity to be configured. At this point, go to steps 303 and 304 and proceed according to the normal process. Step 306 is an optional step.
- step 306 If it is found in step 306 that the frequency points of the A and B cells are the same, it is determined whether the cell identifiers (such as BSIC, PSC, or PCI) of the A and B cells are the same. If the cell identifiers of the A and B cells are different, it is determined that there is no cell identity conflict between the A and B cells, and the process proceeds to steps 303 and 304, and the process is performed according to the normal process.
- cell identifiers such as BSIC, PSC, or PCI
- the cell identity conflict detection can be performed without relying on the cell information reported by the UE and the neighbor cell list.
- the embodiment of the present invention is capable of detecting the cell identity conflict of the coverage and the same coverage scenario described above with reference to FIG. 1, and it is difficult to perform cell identity conflict detection in such a scenario in the prior art.
- the conflict detection apparatus 40 of Fig. 4 can be implemented by any suitable means, for example, by a network element such as a base station, a base station controller or a network side server, or can be implemented by a processing apparatus independent of the communication network.
- the collision detecting means 40 includes a determining unit 41, a searching unit 42, and a detecting unit 43.
- the determining unit 41 determines that the user equipment accesses the first cell or performs connection establishment or connection reestablishment in the first cell at the first time point T1.
- the search unit 42 searches for the interaction information related to the user equipment in the vicinity of the first time point T1 determined by the determining unit 42, and the interaction information is used to record the user equipment and other cells. Last contact information.
- the detecting unit 43 performs a cell identity collision detection on the first cell and the second cell when the search unit 42 searches for the second cell in the other cell to have the interaction information related to the user equipment near the first time point T1.
- the embodiment of the present invention searches for whether the user equipment has interaction information in other cells near the time point of access, connection establishment, or connection reestablishment of a cell, and performs cell identity conflict detection on the cell and other cells that have searched for the interaction information. Not dependent on the neighbor list and the small size of the user device The area information reporting operation improves the detection efficiency of the cell identity conflict.
- the various components of the conflict detection device 40 may implement the corresponding steps of the method described in Figures 2 and 3, and will not be described in detail to avoid redundancy.
- the last contact information may include last signaling or data exchanged between the user equipment and other cells, and a second time point T2 corresponding to the last signaling or data.
- the searching unit 42 may determine that the cell corresponding to the interaction information is the second cell, where ⁇ T1 and ⁇ ⁇ 2 are predetermined threshold values.
- the last piece of signaling or data includes at least one of the following: last uplink signaling or uplink data, last uplink SINR or RSRP data exceeding a threshold, and last HARQ feedback information.
- the last contact information may include a third time point ⁇ 3 of the RRC connection release between the user equipment and other cells.
- the search unit 42 may determine that the cell corresponding to the interaction information is the second cell, where ⁇ ⁇ 3 and ⁇ ⁇ 4 are predetermined threshold values.
- the last contact information may further include a device identifier or a user identifier of the user equipment, or an identifier of an RRC connection between the user equipment and other cells.
- the detecting unit 43 may determine, if the frequency points of the first cell and the second cell are the same, whether the cell identifiers of the first cell and the second cell are the same; If the cell identifier of the second cell is the same, it is detected that the cell identifier conflict occurs between the first cell and the second cell.
- the detecting unit 43 may also detect the first cell and the first cell. There is no cell identity conflict in the second cell.
- the foregoing cell identifier may include a BSIC in GSM, a PSC in UMTS, or a PCI in an LTE system.
- the collision detecting device 40 is capable of performing cell identity collision detection without relying on the cell information reported by the UE and the neighbor list.
- the collision detecting device 40 can detect the cell identity conflict in the coverage and the same coverage scenario described above with reference to FIG. 1, and it is difficult to perform cell identity conflict detection in such a scenario in the prior art.
- 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 coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be electrical, mechanical or otherwise.
- 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 solution of the embodiment.
- 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 functions, if implemented in the form of software functional units and sold or used as separate products, may be stored in a computer readable storage medium.
- the technical solution of the present invention which is essential to the prior art or part of the technical solution, may be embodied in the form of a software product stored in a storage medium, including
- the instructions are used to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform 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 mobile 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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Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
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EP12880744.3A EP2874427B1 (en) | 2012-07-10 | 2012-07-10 | Cell identity conflict detection method and conflict detection device |
PCT/CN2012/078438 WO2014008634A1 (zh) | 2012-07-10 | 2012-07-10 | 小区标识的冲突检测方法和冲突检测装置 |
KR1020157001308A KR101670375B1 (ko) | 2012-07-10 | 2012-07-10 | 셀 식별정보 충돌을 검출하는 방법 및 장치 |
CN201280028285.9A CN103703819B (zh) | 2012-07-10 | 2012-07-10 | 小区标识的冲突检测方法和冲突检测装置 |
US14/585,965 US9480009B2 (en) | 2012-07-10 | 2014-12-30 | Method and apparatus for detecting cell identity conflict |
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PCT/CN2012/078438 WO2014008634A1 (zh) | 2012-07-10 | 2012-07-10 | 小区标识的冲突检测方法和冲突检测装置 |
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US14/585,965 Continuation US9480009B2 (en) | 2012-07-10 | 2014-12-30 | Method and apparatus for detecting cell identity conflict |
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EP (1) | EP2874427B1 (zh) |
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US20100178912A1 (en) * | 2009-01-15 | 2010-07-15 | Telefonaktiebolaget Lm Ericsson (Publ) | Automatic Detection and Correction of Physical Cell Identity Conflicts |
CN102215482A (zh) * | 2010-04-07 | 2011-10-12 | 上海无线通信研究中心 | 一种mrs pci分配方法 |
CN102244877A (zh) * | 2010-05-11 | 2011-11-16 | 中兴通讯股份有限公司 | 一种更新邻区关系列表的方法及装置 |
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EP2874427B1 (en) | 2017-02-01 |
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EP2874427A1 (en) | 2015-05-20 |
CN103703819A (zh) | 2014-04-02 |
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