WO2015039335A1 - Procédé, appareil et système pour déterminer un voisin inter-fréquences, et procédé et appareil de mesure - Google Patents

Procédé, appareil et système pour déterminer un voisin inter-fréquences, et procédé et appareil de mesure Download PDF

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Publication number
WO2015039335A1
WO2015039335A1 PCT/CN2013/083937 CN2013083937W WO2015039335A1 WO 2015039335 A1 WO2015039335 A1 WO 2015039335A1 CN 2013083937 W CN2013083937 W CN 2013083937W WO 2015039335 A1 WO2015039335 A1 WO 2015039335A1
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WIPO (PCT)
Prior art keywords
inter
cell
frequency
potential
neighbor
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PCT/CN2013/083937
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English (en)
Chinese (zh)
Inventor
罗茜
周强
楚志远
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华为技术有限公司
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Priority to PCT/CN2013/083937 priority Critical patent/WO2015039335A1/fr
Priority to CN201380001518.0A priority patent/CN103636247B/zh
Publication of WO2015039335A1 publication Critical patent/WO2015039335A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H04W36/0085—Hand-off measurements
    • H04W36/0088—Scheduling hand-off measurements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H04W36/00835—Determination of neighbour cell lists
    • H04W36/008355—Determination of target cell based on user equipment [UE] properties, e.g. UE service capabilities

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a method, an apparatus, a system, a measurement method and a device for determining an inter-frequency neighboring cell. Background technique
  • the Auto Neighbor Relation (ANR) feature automatically optimizes the neighborhood relationship and is one of the most important features of the Self-Organized Network (English: Self-Organized Network, SON).
  • ANR Auto Neighbor Relation
  • SON Self-Organized Network
  • the detection of the mismatched inter-frequency neighboring cell is not supported. Only the frequency and scrambling code of the neighboring cell may be carried in the measurement control of the normal handover. The frequency neighboring area is measured. If the number of neighboring cells is 32, the frequency and scrambling code of the neighboring zone cannot be sent. On the other hand, the frequency and scrambling code of the missing zone cannot be sent out discretely. Only the start and end ranges of the detection range can be set. The detection time is long, the detection efficiency is low, and the mismatch of the UMTS inter-frequency neighboring area may cause the call drop and the inter-frequency handover failure. Summary of the invention
  • the technical problem to be solved by the present invention is how to improve the handover success rate of the inter-frequency neighboring cell and reduce the call drop rate.
  • an inter-frequency neighboring cell determining method in which a radio access bearer RAB of a user equipment (English: User Equipment, abbreviation: UE) in a cell to be optimized is released After that, the radio resource control (English: Radio Resource Control, abbreviation: RRC) is performed in a time period before the connection is released, and the method includes:
  • the radio network controller (English: Radio Network Controller, abbreviation: RNC) sends an inter-frequency measurement control signal to the UE, where the inter-frequency measurement control signal carries at least one potential neighboring area of the cell;
  • the RNC receives an inter-frequency measurement report that is returned by the UE and carries the inter-frequency measurement result of the potential neighboring cell; the RNC determines, according to the inter-frequency measurement report, an inter-frequency neighboring cell for the cell.
  • the potential neighboring cell is determined by the RNC from a potential neighbor list of the cell according to a neighboring cell priority and a frequency band supported by the UE, where the potential neighbor of the cell
  • the zone list is determined by the RNC according to the engineering parameters of the cell and the configuration parameters of the RNC.
  • the potential neighbor list is determined by the RNC in the following manner:
  • the RNC Determining, according to the latitude and longitude information in the engineering parameters of the cell, the RNC, searching for all cells within a preset leaky distance threshold, centering on the location of the cell, and recording the found cell as the first candidate. Potential neighbourhood
  • the RNC searches for the second-order neighboring area and the third-order neighboring area of the cell according to the RNC configuration data, and records the found neighboring area as the second candidate potential neighboring area;
  • the RNC takes the union of the first candidate potential neighboring area and the second candidate potential neighboring area, and removes the merged neighboring area of the concatenation to obtain a list of potential neighboring areas of the cell.
  • the second-order neighboring cell is an inter-frequency neighboring cell of the same-frequency neighboring cell of the cell
  • the third-order neighboring cell is a co-frequency neighboring cell of the same-frequency neighboring cell of the cell. Inter-frequency neighboring area.
  • the potential neighboring cell is determined by: when there are no more than 32 potential neighboring cells in the potential neighboring cell list, where the potential neighboring cell list is All potential neighbors are determined as potential neighbors of the UE;
  • the RNC determines the priority of the neighboring cell according to the distance between the cell and each potential neighboring cell, and the closer the distance is, the higher the priority of the neighboring zone is, according to the priority of the neighboring zone is from high to low. Sorting potential neighbors in the list of potential neighbors;
  • the RNC screens a potential neighboring area of the potential neighboring cell that does not support the frequency band supported by the UE, to obtain a potential neighboring area of the UE.
  • the method for determining the potential neighboring area further includes:
  • the RNC When the handover of the Public Land Mobilenet Work (PLMN) switch of the UE is closed, the RNC also screens out the potential neighboring area of the PLMN that does not support the UE in the potential neighbor list, and obtains a potential neighbor of the UE; and/or
  • PLMN Public Land Mobilenet Work
  • the RNC When the UE is located in the UMTS inter-frequency neighboring cell, the RNC also blanks the potential neighboring cell in the potential neighboring cell list with a priority of 0 to obtain a potential neighboring cell of the UE.
  • the inter-frequency measurement result includes a scrambling code, a frequency point, an energy per chip and a noise power density noise ratio Ec/N0, and a received signal power of the potential neighboring area ( Received Signal Code Power, RSCP).
  • RSCP Received Signal Code Power
  • the method further includes:
  • the RNC records the number of times each potential neighbor is delivered in the RNC log.
  • the determining, by the measurement report, the inter-frequency neighboring cell for the cell further includes:
  • the RNC further determines an inter-frequency neighboring cell for the cell according to the number of times of the record recorded in the RNC log. In a possible implementation, if the UE of the cell enters a call flow, the RNC terminates the currently performed action, and after the call flow ends, retransmits the inter-frequency from the UE.
  • the measurement control signal begins to perform the inter-frequency neighbor determination method.
  • the method further includes:
  • the RNC releases the radio resource control connection of the UE
  • the timeout period from the release of the RAB of the UE of the cell to the release of the RRC connection is 20 seconds - 60 seconds.
  • an inter-frequency neighbor determining apparatus including:
  • a first sending module configured to send an inter-frequency measurement control signal to the UE, where the inter-frequency measurement control signal carries a potential neighboring area of the at least one cell to be optimized;
  • An inter-frequency neighboring cell determining module configured to receive, by the first sending module, an inter-frequency measurement report that is returned by the UE and carries the inter-frequency measurement result of the potential neighboring cell, and according to the inter-frequency measurement report Determining an inter-frequency neighboring cell for the cell,
  • the first sending module and the inter-frequency neighboring cell determining module perform an action in a period before the radio resource control connection is released after the radio access bearer of the UE in the cell is released.
  • the method further includes:
  • a neighboring list determining module configured to determine, according to an engineering parameter of the cell and an RNC configuration parameter, a potential neighboring list of the to-be-optimized cell;
  • the potential neighboring area determining module is connected to the neighboring cell list determining module, and is configured to determine a potential neighboring cell for each of the UEs from the potential neighboring cell list of the cell according to the neighboring cell priority and the frequency band supported by the UE.
  • the neighboring cell list determining module specifically includes: a candidate potential neighboring cell determining unit, configured to: according to a latitude and longitude letter in an engineering parameter of the cell And searching for all the cells in the range of the preset mismatch distance threshold, and searching for the found cell as the first candidate potential neighboring area; and also for configuring data according to the RNC. Finding a second-order neighboring cell and a third-order neighboring cell of the cell, and identifying the discovered neighboring cell as a second candidate potential neighboring cell;
  • the potential neighboring cell list determining unit is connected to the candidate potential neighboring cell determining unit, configured to take the union of the first candidate potential neighboring zone and the second candidate potential neighboring zone, and remove the merged With the neighboring cell, a list of potential neighboring cells of the cell is obtained.
  • the second-order neighboring cell is an inter-frequency neighboring cell of the same-frequency neighboring cell of the cell
  • the third-order neighboring cell is different from the same-frequency neighboring cell of the same-frequency neighboring cell of the cell. Frequency neighboring area.
  • the potential neighboring area determining module specifically includes:
  • a determining unit configured to be connected to the potential neighboring cell list determining unit, configured to determine, when the potential neighboring cell list in the potential neighboring cell list is no more than 32, all potential neighboring cells in the potential neighboring cell list as a potential neighboring area of the UE;
  • a sorting unit configured to be connected to the potential neighboring cell list determining unit, configured to determine, according to a distance between the cell and each potential neighboring cell, when the number of potential neighboring cells in the potential neighboring cell list is more than 32
  • the priority of the neighboring cell the closer the distance is, the higher the priority of the neighboring cell is, and the priority of the neighboring cell is ranked according to the priority of the neighboring cell;
  • the frequency band screening unit is connected to the potential neighboring cell list determining unit, and is configured to: when the potential neighboring cell list has more than 32 potential neighboring cells, the UE is not supported by the potential neighboring cell.
  • the potential neighbors of the frequency band are screened out to obtain the potential neighboring area of the UE.
  • the potential neighboring area determining module further includes:
  • a PLMN screening unit configured to: when there are more than 32 potential neighboring cells in the potential neighboring cell list, and when the PLMN switching switch of the UE is closed, the UE is not supported in the potential neighboring cell list.
  • the potential neighbors of the PLMN are screened out to obtain potential neighbors of the UE; and/or
  • An override priority screening unit for using more than 32 potential neighbors in the list of potential neighbors And when the UE is located in the UMTS inter-frequency neighboring cell, the potential neighboring cell with the priority of 0 in the potential neighboring cell list is screened out to obtain a potential neighboring cell of the UE.
  • the inter-frequency neighboring cell determining module is specifically configured to determine, according to the inter-frequency measurement report of the potential neighboring cell, the inter-frequency measurement report, the Ec/N0, and the RSCP. Inter-frequency neighboring area.
  • the method further includes: a recording module, configured to record, in the RNC log, the number of times each potential neighbor is delivered.
  • the inter-frequency neighboring cell determining module is further configured to determine an inter-frequency neighboring cell for the cell according to the number of times of the recording in the RNC log.
  • the method further includes:
  • a first control module configured to be connected to another module of the inter-frequency neighboring cell determining device, to control, when the UE of the cell enters a call flow, to terminate the currently performed action, and in the call flow After the end, the first sending module is controlled to resend the inter-frequency measurement control signal to the UE.
  • the method further includes:
  • a release module configured to be connected to the inter-frequency neighboring cell determining module, configured to release an RRC connection of the UE after the inter-frequency neighboring cell determining module determines an inter-frequency neighboring cell for the cell, where the cell
  • the period between the release of the RAB of the UE and the release of the RRC connection is between 20 seconds and 60 seconds.
  • an inter-frequency neighboring cell measurement method is further provided, where the RAB release of the UE in the cell to be optimized is performed within a time period before the RRC connection is released, Methods include:
  • the UE receives the inter-frequency measurement control signal sent by the RNC, where the inter-frequency measurement control signal carries at least one potential neighboring area of the cell;
  • the UE performing inter-frequency measurement on the potential neighboring area according to the inter-frequency measurement control signal includes:
  • the UE measures the scrambling code, the frequency point, the Ec/N0, and the RSCP of the potential neighboring cell.
  • the method further includes: if the UE enters a call flow, the UE terminates the currently performed inter-frequency neighbor cell measurement method, and after the end of the call process, re-according to the received latest difference
  • the frequency measurement control signal performs an inter-frequency measurement on the potential neighboring area.
  • an inter-frequency neighboring area measuring apparatus including:
  • a second receiving module configured to receive an inter-frequency measurement control signal sent by the RNC, where the inter-frequency measurement control signal carries a potential neighboring area of the at least one cell to be optimized;
  • the inter-frequency measurement module is connected to the second receiving module, and configured to perform inter-frequency measurement on the potential neighboring area according to the inter-frequency measurement control signal;
  • a second sending module configured to be connected to the inter-frequency measurement module, configured to carry the inter-frequency measurement result in the inter-frequency measurement report, and send the report to the RNC, where the inter-frequency measurement report is used by the RNC to determine the cell Inter-frequency neighboring area,
  • the second receiving module, the inter-frequency measurement module, and the second sending module perform an action within a time period before the radio resource control connection is released after the radio access bearer of the UE in the cell is released.
  • the inter-frequency measurement module is specifically configured to measure the scrambling code, the frequency point, the Ec/N0, and the RSCP of the potential neighboring area.
  • the method further includes:
  • the embodiment of the present invention further provides an inter-frequency neighboring cell selection system, including the inter-frequency neighboring cell determining apparatus of any one of the foregoing, and the inter-frequency neighboring cell measuring device of any one of the foregoing.
  • the inter-frequency neighboring cell determining method, device and system provided by the embodiment, the inter-frequency neighboring cell measuring method and device, firstly, the method is performed after the RAB release of the UE and before the RRC release, and the normal to the UE
  • the switching service has no effect, avoids the call drop and inter-frequency handover failure caused by the mismatch of the UMTS inter-frequency neighboring cell, reduces the call drop rate and improves the inter-frequency handover success rate.
  • the RNC implements the UMTS ANR function according to the actual measurement result of the UE to the potential cell, and selects the inter-frequency neighboring cell for the cell to be optimized, which has high accuracy and superior performance.
  • the UE can complete the measurement of the missing neighboring cell without relying on the standard ANR, and provide the RNC with accurate measurement results to facilitate the RNC to implement the UMTS ANR function.
  • FIG. 1 shows a flow chart of a method for determining an inter-frequency neighboring cell according to an embodiment of the present invention
  • FIG. 2 is a flow chart showing a method for determining an inter-frequency neighboring cell according to another embodiment of the present invention
  • FIG. 3 is a flowchart showing a list of potential neighboring cells according to another embodiment of the present invention
  • FIG. 5 is a flowchart of a method for measuring an inter-frequency neighboring cell according to still another embodiment of the present invention
  • FIG. 6 is a schematic structural diagram of an apparatus for determining an inter-frequency neighboring cell according to still another embodiment of the present invention
  • FIG. 7 is a schematic structural diagram of an inter-frequency neighboring cell measuring apparatus according to still another embodiment of the present invention
  • FIG. 8 is a schematic structural diagram of an inter-frequency neighboring cell selecting system according to still another embodiment of the present invention
  • FIG. 1 is a flow chart showing a method for determining an inter-frequency neighboring cell according to an embodiment of the present invention. As shown in Figure 1, the method mainly includes:
  • Step 110 After the RAB release of the UE of the cell to be optimized, before the RRC connection is released, the RNC sends an inter-frequency measurement control signal to the UE, where the inter-frequency measurement control signal carries at least one potential neighboring cell of the to-be-optimized cell;
  • Step 120 The RNC receives an inter-frequency measurement report that is returned by the UE and carries the inter-frequency measurement result of the potential neighboring cell.
  • Step 130 The RNC determines an inter-frequency neighboring cell for the to-be-optimized cell according to the inter-frequency measurement report.
  • This embodiment is performed after the completion of the RAB release of the UE and before the release of the RRC connection, that is, the RRC release is not performed immediately after the RAB release is completed, and the time between the two is set to be 20s-60s.
  • the method for determining the inter-frequency neighboring cell is performed in the time period, which has no effect on the normal handover service of the UE, and avoids the call drop and the inter-frequency handover failure caused by the mismatch of the UMTS inter-frequency neighboring cell, and reduces the dropped call. Rate and improve the success rate of inter-frequency switching.
  • FIG. 2 is a flow chart showing a method and a method for determining an inter-frequency neighboring cell according to another embodiment of the present invention. As shown in Figure 2, the method includes:
  • Step S210 The RNC determines, for each cell to be optimized, a list of potential neighbors that need to be detected.
  • a potential neighboring area refers to an unconfigured cell that may be switched within a certain distance, for example, a third-order neighboring cell, that is, a missing neighboring cell.
  • the potential neighboring area can be calculated according to the engineering parameters of the cell to be optimized and the RNC configuration data. If there is no engineering parameter for a cell to be optimized, then the potential neighbors can be calculated using only the RNC configuration data.
  • the step S210 specifically includes:
  • Step S2101 The RNC calculates a first candidate potential neighboring area according to an engineering parameter of the to-be-optimized cell.
  • an engineering parameter of the to-be-optimized cell using the latitude and longitude information in the engineering parameters, centering on the location of the cell to be optimized, searching for all cells within the range of the preset distance threshold (English: Distance Threshold), and searching for the found cell
  • the set ⁇ A ⁇ For the first candidate potential neighboring cell of the to-be-optimized cell, the set ⁇ A ⁇ ; if a cell to be optimized has no engineering parameters, the set ⁇ A ⁇ corresponding to the cell to be optimized is empty.
  • the mismatch distance threshold in this embodiment, it is determined according to the environment in which the base station is located. For example, when the base station is located in the urban area, the distance between the base stations is relatively close, so that the missing distance threshold can be set to 1 km, and the base stations are located far apart in the suburb, and the corresponding missing distance threshold can be set larger, for example, 2 or 3 kilometers.
  • Step S2102 The RNC calculates a second candidate potential neighbor according to the RNC configuration data of the to-be-optimized cell.
  • the neighbor information in the RNC configuration data searching for the second order of each cell to be optimized a neighboring cell and a third-order neighboring cell, and the discovered neighboring cell is recorded as a second candidate potential neighboring cell of the to-be-optimized cell, and the set ⁇ B ⁇ ;
  • the second-order neighboring cell and the third-order neighboring cell search algorithm include:
  • the first-order neighboring cell is an inter-frequency neighboring cell of the cell to be optimized
  • the second-order neighboring cell is an inter-frequency neighboring cell of the same-frequency neighboring cell of the to-be-optimized cell
  • the third-order neighboring cell is an inter-frequency neighboring cell of the same-frequency neighboring cell of the same-frequency neighboring cell of the to-be-optimized cell.
  • the set of first-order neighboring regions, second-order neighboring regions, and third-order neighboring regions constitutes a set ⁇ B ⁇ .
  • Step S2103 Combine the collection ⁇ A ⁇ and the collection ⁇ B ⁇ .
  • the first candidate potential neighbor set ⁇ A ⁇ and the second candidate potential neighbor set ⁇ B ⁇ are merged, that is, the union is taken as the set ⁇ C ⁇ .
  • Step S2104 The RNC filters the merged candidate potential neighbor set to generate a potential neighbor list.
  • the allocated neighboring cells are filtered out from the set ⁇ C ⁇ , and the remaining neighboring cells constitute a list of potential neighboring cells of the to-be-optimized cell.
  • Step 220 After the RAB release of the UE is completed, the RNC sends an inter-frequency measurement control signal to the UE in the cell to be optimized, where the inter-frequency measurement control signal carries at least a scrambling code range that needs to be measured corresponding to the potential neighboring area of the UE. And frequency range;
  • the RRC connection is released immediately after the RAB of the UE is released in the prior art, and the RAB release service in the UE includes circuit switching (English: Circuit Switch, abbreviation: CS) domain RAB release or grouping.
  • the RNC does not release the RRC connection immediately. Instead, it releases the RRC connection of the UE for a period of time.
  • the extended time range can be 20s-60s. In the embodiment, it is preferably 30 seconds.
  • the method provided by the present invention is performed during the extended period of time.
  • the RNC carries the scrambling code range and the frequency range in the inter-frequency measurement control signal, so that the UE can Proprietary measurements are made on the corresponding potential neighbors based on the scrambling code range and frequency range.
  • Each of the inter-frequency measurement control signals delivers a maximum of 32 potential neighboring regions' scrambling codes and frequency points.
  • the inter-frequency measurement control signal can also carry the energy per-chip energy to noise power density noise ratio Ec/NO and RSCP.
  • the potential neighboring area carried is selected from the list of potential neighboring areas, as shown in FIG. 4, specifically, the method for selecting a potential neighboring area from the list of potential neighboring areas for each UE is:
  • Step 2201 The RNC determines whether the potential neighboring cell in the potential neighboring cell list is not greater than 32. If yes, step 2206 is performed; otherwise, the RNC compares all potential neighboring cells in the potential neighboring cell list according to the neighboring cell priority and the frequency band supported by each UE. Performing polling, selecting a potential neighboring area for the UE to perform measurement for each UE, and performing step 2202;
  • Step 2206 The RNC determines all potential neighboring areas in the potential neighbor list as potential neighboring areas of each UE.
  • Step 2202 The RNC sorts all potential neighboring cells in the potential neighboring cell list according to the neighboring cell priority.
  • the neighboring cell priority refers to the distance between the source cell (that is, the cell to be optimized) and the potential neighboring cell. The closer the distance is, the closer the distance is. The higher the priority, the higher the sorting, and it can also be called the neighboring configuration order.
  • Step 2203 The RNC filters the sorted potential neighboring areas according to the frequency bands supported by the UE, and screens the potential neighboring areas of the frequency band that does not support the UE, and obtains a potential neighboring area corresponding to each UE, if the potential neighboring area
  • the number of the inter-frequency measurement control signals sent by the UE is more than one, because there are more than 32 inter-frequency measurement control signals.
  • the method further includes: Step 2204: The RNC may perform further screening on the potential neighboring area after the frequency band screening according to the PLMN supported by the UE, and the UE is not supported. The potential neighbor of the PLMN is screened out; if the UE's cross-PLMN switch is turned on, this step is not performed.
  • the method may further include:
  • Step 2205 The RNC also filters according to the coverage priority of the potential neighboring area, and filters out the potential neighboring area with the priority of 0.
  • the coverage priority is set in advance. For example, the priority of some frequency points is higher than the priority of other frequency points.
  • the UE needs to send a higher priority frequency point for measurement, and the coverage priority of such a cell is relatively high. The higher the priority of the inter-frequency neighboring cell is, the easier it is to be delivered as the coverage measurement object and the easier it is for the UE to switch to the cell. If the priority is 0, the cell with the priority of 1 is sent to the UE with a higher priority than the cell with the priority of 2. The cell is more easily delivered as the coverage measurement object, and the UE is more likely to switch to the coverage priority. A cell of 1.
  • the priorities of the inter-frequency neighboring cells are processed according to the highest priority among them, and when the number of inter-frequency neighboring cells is greater than 32, Neighbors with low priority overrides will not be delivered in the measurement control list.
  • the distance information based on the priority of the neighboring cell and the frequency band supported by the UE are carried when the UE requests to establish an RRC connection, and the RNC obtains the information carried in the RRC request.
  • the distance information is calculated by the UE according to the latitude and longitude information in the engineering parameter information, the mobile country number (English: Mobile Country Code, abbreviation: MCC) + mobile network number (English: Mobile Network Code, abbreviation: MNC), ie PLMN, according to the project Parameters and RNC configuration parameters are available.
  • the order in which the potential neighboring cells in the list of potential neighboring cells are filtered according to the above four conditions is not limited to the above order.
  • each UE Since each UE has different frequency point capabilities, different supported frequency bands, or different PLMNs, the potential neighbors selected by the RNC for each UE may not be identical.
  • the polling is started from the beginning, that is, the inter-frequency measurement control signal is issued cyclically.
  • Step 230 The UE performs inter-frequency measurement on the potential neighboring area in the inter-frequency measurement control signal according to the received inter-frequency measurement control signal, and carries the inter-frequency measurement result in the inter-frequency measurement report (English: Measurement Report) Return to the RNC.
  • the scrambling code for each potential neighboring area Frequency, Ec/N0 and RSCP are detected.
  • the method may further comprise:
  • Step 240 Record, in the RNC log, the number of times each potential neighbor in the potential neighbor list is delivered.
  • the RNC adds a block of information sent by the potential neighboring area to the RNC log, and counts the number of times that each potential neighboring area is delivered.
  • Step 250 The RNC selects an inter-frequency neighboring cell for each cell to be optimized according to the received inter-frequency measurement report.
  • the RNC or the SON master sorts the potential neighbors according to the number of times the potential neighbors are sent, the signal quality, the scrambling code, the frequency point, the Ec/NO, and the RSCP, and combines the inter-frequency neighbor list of the to-be-optimized cell.
  • the vacant location in the eNB is selected as the inter-frequency neighboring cell for each cell to be optimized. For example, if the vacant location in the inter-frequency neighboring cell list of the cell to be optimized is 5, the RNC selects the potential neighbors of the top 5 bits for the cell to be optimized.
  • the area acts as an inter-frequency neighbor.
  • the cell to be optimized has a UE originating a call, or is called, the current inter-frequency measurement is suspended, and the RNC starts a normal RAB request connection, and After the call is over, the extended inter-frequency measurement time is recalculated and the inter-frequency measurement is restarted.
  • the UE may be preferentially allowed to measure the potential neighboring cell.
  • the RRC connection may be released, or after the preset time period is over, the RRC connection is released.
  • the inter-frequency neighboring cell determining method provided in this embodiment is first performed in the time period after the completion of the RAB release of the UE and the RRC release service, and has no effect on the normal handover service of the UE, and avoids the UMTS inter-frequency handover. Call drop and inter-frequency handover failure caused by neighboring area miss allocation reduce the call drop rate and improve the inter-frequency handover success rate. Second, the RNC actually measures the potential cell based on the UE. As a result, the UMTS ANR function is implemented, and the inter-frequency neighboring cell is selected for the cell to be optimized, which has high accuracy and superior performance.
  • FIG. 5 is a flowchart of a method for measuring an inter-frequency neighboring cell according to another embodiment of the present invention.
  • the method includes: Step 310: After receiving the RAB release, the UE receives an inter-frequency measurement control signal sent by the RNC, where the inter-frequency measurement control signal is received.
  • the potential neighboring cell of the to-be-optimized cell to which the UE belongs is carried.
  • the RNC does not immediately release the RRC connection, but extends the RRC connection after extending the time of 20-60s. During the extended period of time, the RNC selects a potential neighboring cell for each UE in the cell to be optimized and carries the potential neighboring cell in the inter-frequency measurement control signal and sends it to each UE.
  • Step 320 The UE performs inter-frequency measurement on the potential neighboring area according to the received inter-frequency measurement control signal.
  • the inter-frequency measurement control signal includes a potential neighboring area selected for each UE, and needs to be measured by each potential neighboring area. Scrambling code range and frequency range. Then, each UE performs inter-frequency measurement on the scrambling code, frequency point, Ec/NO, and RSCP of the potential cell according to the received inter-frequency measurement control signal.
  • Step 330 The UE carries the inter-frequency measurement result in the inter-frequency measurement report and sends the result to the RNC, where the inter-frequency measurement report is used by the RNC to determine the inter-frequency neighboring cell for the cell to be optimized.
  • the UE carries the inter-frequency measurement result of the scrambling code, the frequency point, the Ec/NO and the RSCP of the potential cell in the inter-frequency measurement report and returns it to the RNC, so that the RNC selects the inter-frequency neighboring area for the cell to be optimized.
  • the UE can complete the measurement of the missing neighboring cell without relying on the standard ANR, and provide the RNC with accurate measurement results to facilitate the RNC to implement the UMTS ANR function.
  • FIG. 6 is a schematic structural diagram of an inter-frequency neighboring cell determining apparatus according to another embodiment of the present invention.
  • the inter-frequency neighboring cell determining apparatus 100 includes: a first transmitting module 11 and an inter-frequency neighboring cell determining module 13.
  • the first sending module 11 is configured to send an inter-frequency measurement control signal to the UE after the RAB of the UE to be optimized, and the inter-frequency measurement control signal carries at least one potential neighboring cell to be optimized.
  • the neighboring area determining module 13 is connected to the first sending module 11 and configured to receive the inter-frequency measurement report of the inter-frequency measurement result of the potential neighboring area returned by the UE, and determine the inter-frequency neighboring area for the to-be-optimized cell according to the inter-frequency measurement report. .
  • the method further includes: a neighbor list determining module 14 and a potential neighbor determining module 15.
  • the neighboring cell list determining module 14 is configured to determine a potential neighboring cell list of the cell to be optimized according to the engineering parameter and the RNC configuration parameter of the cell to be optimized; the potential neighboring cell determining module 15 is connected to the neighboring cell list determining module 14 and the first sending module 11
  • a potential neighboring area is determined for each UE from the list of potential neighboring cells according to the priority of the neighboring cell and the frequency band supported by each UE of the cell to be optimized.
  • the foregoing neighbor list determining module 14 specifically includes: a candidate potential neighbor determining unit 141, and a potential neighbor list determining unit 142.
  • the candidate potential neighboring area determining unit 141 is configured to: according to the latitude and longitude information in the engineering parameter of the to-be-optimized cell, look for all the cells in the range of the preset missing matching distance threshold, centering on the location of the to-be-optimized cell, and search for The obtained cell is recorded as the first candidate potential neighboring cell; and is further configured to search for the second-order neighboring cell and the third-order neighboring cell of the to-be-optimized cell according to the RNC configuration data, and record the discovered neighboring cell as the second candidate potential neighboring cell;
  • the potential neighboring cell list determining unit 142 is connected to the candidate potential neighboring cell determining unit 141, and is configured to take the union of the first candidate potential neighboring zone and the second candidate potential neighboring zone, and filter out the concentrated neighboring zone to obtain the neighboring zone.
  • the first-order neighboring cell is the inter-frequency neighboring cell of the cell to be optimized; the second-order neighboring cell is the inter-frequency neighboring cell of the same-frequency neighboring cell of the cell to be optimized, and the third-order neighboring cell is the same as the cell to be optimized.
  • the potential neighbor determining module 15 specifically includes: a sorting unit 151 and a frequency band screening unit 152.
  • the sorting unit 151 is connected to the potential neighboring area list determining unit 142, and is configured to determine a neighboring area priority according to a distance between the to-be-optimized cell and each potential neighboring area, and the closer the distance is, the higher the neighboring area priority is. Sorting potential neighbors in the list of potential neighbors according to the priority of the neighboring cell; Band screening unit
  • the 142 is connected to the potential neighbor list determining unit 142, and is configured to screen the potential neighboring area of the frequency band that does not support UE support in the potential neighboring area to obtain a potential neighboring area of the UE.
  • the potential neighbors may also be sorted according to the PLMN and the coverage priority. Therefore, the potential neighboring area determining module 15 further includes: a PLMN screening unit 153, configured to: when the PLMN switching switch of the UE is closed, screen the potential neighboring area of the PLMN that does not support the UE in the potential neighboring list, and obtain the potential neighbor of the UE. District; and/or
  • the coverage priority screening unit 154 is configured to: when the UE is located in the UMTS inter-frequency neighboring area, screen the potential neighboring area with the priority of 0 in the potential neighbor list to obtain the potential neighboring area of the UE.
  • the potential neighboring cell determining module 15 may further include a determining unit 155, configured to determine all potential neighboring cells in the potential neighboring cell list as potential neighboring cells of the UE. .
  • the embodiment further includes a recording module 16, configured to record, in the RNC log, the number of times that each potential neighboring area is delivered, so that the inter-frequency neighboring area determining module 13 is further configured to use the number of times of recording according to the record in the RNC log.
  • the inter-frequency neighboring cell is determined for the cell to be optimized, and the more the number of times of sending, the higher the priority of being selected as the inter-frequency neighboring cell.
  • the embodiment further includes a first control module 17 that is connected to other modules of the inter-frequency neighboring cell determining apparatus 100 (the connection relationship is not shown), and is used to control other UEs entering the call flow when the cell to be optimized enters the call flow.
  • the module terminates the currently performed action, and after the call flow ends, controls the first sending module 11 to resend the inter-frequency measurement control signal to the UE.
  • the release module 18 is further configured to be connected to the inter-frequency neighboring cell determining module 13 to release the RRC connection of the UE after the inter-frequency neighboring cell determining module 13 determines the inter-frequency neighboring cell for the cell to be optimized, where the cell to be optimized is
  • the time range from the completion of the RAB release of the UE to the release of the RRC connection of the UE ranges from 20 seconds to 60 seconds.
  • the RAB of the UE of the inter-frequency neighboring cell determining apparatus in the cell to be optimized in this embodiment After the release, the action is performed within a period of time before the RRC connection is released.
  • FIG. 7 is a block diagram showing the structure of an inter-frequency neighboring area measuring apparatus 200, which includes a second receiving module 21, an inter-frequency measuring module 22, and a second transmitting module 23, according to still another embodiment of the present invention.
  • the second receiving module 21 is configured to receive, after the completion of the RAB release, the inter-frequency measurement control signal sent by the RNC, where the inter-frequency measurement control signal carries a potential neighboring cell of the to-be-optimized cell to which the at least one UE belongs, and the inter-frequency measurement module 22
  • the method is used for performing inter-frequency measurement on the potential neighboring area according to the inter-frequency measurement control signal, specifically for measuring the scrambling code, the frequency point, the Ec/N0, and the RSCP of the potential neighboring area;
  • the second sending module 23 is configured to use the different frequency
  • the measurement result is carried in the inter-frequency measurement report and sent to the RNC, and the inter-frequency measurement report is used by the RNC to determine the inter-frequency neighboring area for the cell to
  • the second control module 24 is further connected to other modules of the inter-frequency neighboring cell measuring device 200, and is configured to control other modules to terminate the currently performed inter-frequency neighbor cell measurement when the UE enters the call flow, in the call flow.
  • the control inter-frequency neighboring area measurement module 22 performs the inter-frequency measurement on the potential neighboring area according to the received latest inter-frequency measurement control signal.
  • Each module of the inter-frequency neighboring cell measurement apparatus of this embodiment performs an action within a period before the release of the RRC connection after the RAB of the UE in the cell is released.
  • FIG. 8 is a schematic structural diagram of an inter-frequency neighboring cell selection system according to another embodiment of the present invention.
  • the inter-frequency neighboring cell selection system 300 includes the inter-frequency neighboring cell determining apparatus 100 and the inter-frequency neighboring zone measuring apparatus in the foregoing embodiment. 200.
  • FIG. 9 is a block diagram showing the structure of a network device according to another embodiment of the present invention.
  • the network device 1100 may be a host server having a computing capability, a personal computer PC, or a portable computer or terminal that can be carried. The specific embodiments of the present invention do not limit the specific implementation of the computing node.
  • the network device 1100 includes a processor 110, a communications interface 1120, a memory 1130, and a bus 1140.
  • the processor 1110, the communication interface 1120, and the memory 1130 complete communication with each other through the bus 1140.
  • Communication interface 1120 is for communicating with network devices, such as virtual machine management centers, shared storage, and the like.
  • the processor 1110 is for executing a program.
  • the processor 1110 may be a central processing unit CPU, or an Application Specific Integrated Circuit (ASIC), or one or more integrated circuits configured to implement embodiments of the present invention.
  • ASIC Application Specific Integrated Circuit
  • the memory 1130 is used to store files.
  • the memory 1130 may include a high speed RAM memory, and may also include a non-volatile memory such as at least one disk memory.
  • Memory 1130 can also be a memory array.
  • the memory 1130 may also be partitioned, and the blocks may be combined into a virtual volume according to certain rules.
  • the above program may be a program code including computer operating instructions.
  • the program is specifically configured to: perform, after the RAB release of the UE of the cell to be optimized, the time period before the RRC connection is released, the method includes:
  • the radio network controller sends an inter-frequency measurement control signal to the UE, where the inter-frequency measurement control signal carries at least one potential neighboring area of the cell;
  • the RNC receives an inter-frequency measurement report that is returned by the UE and carries the inter-frequency measurement result of the potential neighboring cell; the RNC determines, according to the inter-frequency measurement report, an inter-frequency neighboring cell for the cell.
  • the potential neighboring cell is determined by the RNC from a potential neighbor list of the cell according to a neighboring cell priority and a frequency band supported by the UE, where the potential neighbor of the cell
  • the zone list is determined by the RNC according to the engineering parameters of the cell and the configuration parameters of the RNC.
  • the potential neighbor list is the RNC in the following manner definite:
  • the RNC Determining, according to the latitude and longitude information in the engineering parameters of the cell, the RNC, searching for all cells within a preset leaky distance threshold, centering on the location of the cell, and recording the found cell as the first candidate. Potential neighbourhood
  • the RNC searches for the second-order neighboring area and the third-order neighboring area of the cell according to the RNC configuration data, and records the found neighboring area as the second candidate potential neighboring area;
  • the RNC takes the union of the first candidate potential neighboring area and the second candidate potential neighboring area, and removes the merged neighboring area of the concatenation to obtain a list of potential neighboring areas of the cell.
  • the second-order neighboring cell is an inter-frequency neighboring cell of the same-frequency neighboring cell of the cell
  • the third-order neighboring cell is a co-frequency neighboring cell of the same-frequency neighboring cell of the cell. Inter-frequency neighboring area.
  • the potential neighboring cell is determined by: when there are no more than 32 potential neighboring cells in the potential neighboring cell list, where the potential neighboring cell list is All potential neighbors are determined as potential neighbors of the UE;
  • the RNC determines the priority of the neighboring cell according to the distance between the cell and each potential neighboring cell, and the closer the distance is, the higher the priority of the neighboring zone is, according to the priority of the neighboring zone is from high to low. Sorting potential neighbors in the list of potential neighbors;
  • the RNC screens a potential neighboring area of the potential neighboring cell that does not support the frequency band supported by the UE, to obtain a potential neighboring area of the UE.
  • the method for determining the potential neighboring area further includes:
  • the RNC When the handover of the Public Land Mobilenet Work (PLMN) switch of the UE is closed, the RNC also screens out the potential neighboring area of the PLMN that does not support the UE in the potential neighbor list, and obtains a potential neighbor of the UE; and/or
  • PLMN Public Land Mobilenet Work
  • the RNC When the UE is located in the UMTS inter-frequency neighboring cell, the RNC also filters the potential neighboring cell with the priority of 0 in the potential neighboring cell list to obtain a potential neighboring cell of the UE.
  • the inter-frequency measurement result includes a scrambling code, a frequency point, an energy per chip and a noise power density noise ratio Ec/N0, and a received signal power of the potential neighboring area ( Received Signal Code Power, RSCP).
  • the method further includes:
  • the RNC records the number of times each potential neighbor is delivered in the RNC log.
  • the determining, by the measurement report, the inter-frequency neighboring cell for the cell further includes:
  • the RNC further determines an inter-frequency neighboring cell for the cell according to the number of times of transmission recorded in the RNC log.
  • the RNC terminates the currently performed action, and after the call flow ends, retransmits the inter-frequency from the UE.
  • the measurement control signal begins to perform the inter-frequency neighbor determination method.
  • the method further includes:
  • the RNC releases the radio resource control connection of the UE
  • the timeout period from the release of the RAB of the UE of the cell to the release of the RRC connection is 20 seconds - 60 seconds.
  • the network device in the embodiment of the present invention may further perform an inter-frequency neighboring cell measurement method, where the RAB of the UE in the cell to be optimized is released, and the time period before the RRC connection is released, the method includes:
  • the UE receives the inter-frequency measurement control signal sent by the RNC, where the inter-frequency measurement control signal carries at least one potential neighboring area of the cell;
  • the UE performs inter-frequency measurement on the potential neighboring area according to the inter-frequency measurement control signal; the UE carries the inter-frequency measurement result in the inter-frequency measurement report and sends the result to the RNC, where The inter-frequency measurement report is used by the RNC to determine an inter-frequency neighboring cell for the cell.
  • the UE performing inter-frequency measurement on the potential neighboring area according to the inter-frequency measurement control signal includes:
  • the UE measures the scrambling code, the frequency point, the Ec/N0, and the RSCP of the potential neighboring cell.
  • the method further includes: if the UE enters a call flow, the UE terminates the currently performed inter-frequency neighbor cell measurement method, and after the end of the call process, re-according to the received latest difference
  • the frequency measurement control signal performs an inter-frequency measurement on the potential neighboring area.
  • the function is implemented in the form of computer software and sold or used as a stand-alone product, it may be considered to some extent that all or part of the technical solution of the present invention (for example, a part contributing to the prior art) is It is embodied in the form of computer software products.
  • the computer software product is typically stored in a computer readable non-volatile storage medium, including instructions for causing a computer device (which may be a personal computer, server, or network device, etc.) to perform all of the methods of various embodiments of the present invention. Or part of the steps.
  • the foregoing storage medium includes various media that can store program codes, such as a USB flash drive, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
  • the method, device, system, and method and device for determining the inter-frequency neighboring cell according to the embodiment of the present invention can be applied to the field of communications, and is particularly applicable to the scenario of configuring a GSM missed neighboring cell in UMTS, which can effectively reduce the call drop rate and improve the handover. Success rate.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un procédé, un appareil et un système pour déterminer un voisin inter-fréquences, ainsi qu'un procédé et un appareil de mesure. Le procédé pour déterminer un voisin inter-fréquences est réalisé après qu'un support d'accès radio d'un équipement utilisateur (UE) dans une cellule à optimiser est libéré et avant qu'une connexion de commande de ressource radio ne soit libérée. Le procédé comprend les opérations suivantes : un dispositif de commande de réseau radio (RNC) envoie un signal de commande de mesure inter-fréquences à l'UE, le signal de commande de mesure inter-fréquences véhiculant au moins un voisin potentiel de la cellule; le RNC reçoit un rapport de mesure inter-fréquences véhiculant le résultat de mesure inter-fréquences du voisin potentiel renvoyé par l'UE; et le RNC détermine un voisin inter-fréquences pour la cellule selon le rapport de mesure inter-fréquences. Le procédé et l'appareil de la présente invention peuvent éviter un abandon d'appel et un échec de commutation inter-fréquences provoqués par une mise en correspondance manquée de voisins inter-fréquences UMTS, réduisant le taux d'abandons d'appel et améliorant le taux de réussite de commutation inter-fréquences.
PCT/CN2013/083937 2013-09-22 2013-09-22 Procédé, appareil et système pour déterminer un voisin inter-fréquences, et procédé et appareil de mesure WO2015039335A1 (fr)

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PCT/CN2013/083937 WO2015039335A1 (fr) 2013-09-22 2013-09-22 Procédé, appareil et système pour déterminer un voisin inter-fréquences, et procédé et appareil de mesure
CN201380001518.0A CN103636247B (zh) 2013-09-22 2013-09-22 异频邻区确定方法、装置及系统、测量方法及装置

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