WO2013113200A1 - Procédé et dispositif pour traiter une liste de cellules et terminal mobile - Google Patents

Procédé et dispositif pour traiter une liste de cellules et terminal mobile Download PDF

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Publication number
WO2013113200A1
WO2013113200A1 PCT/CN2012/076758 CN2012076758W WO2013113200A1 WO 2013113200 A1 WO2013113200 A1 WO 2013113200A1 CN 2012076758 W CN2012076758 W CN 2012076758W WO 2013113200 A1 WO2013113200 A1 WO 2013113200A1
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Prior art keywords
cell
list
cell list
mobile terminal
frequency
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PCT/CN2012/076758
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English (en)
Chinese (zh)
Inventor
尚鹏
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中兴通讯股份有限公司
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Publication of WO2013113200A1 publication Critical patent/WO2013113200A1/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
    • H04W36/00835—Determination of neighbour cell lists

Definitions

  • the present invention relates to the field of mobile communications, and in particular to a method and device for processing a cell list, and a mobile terminal.
  • the mobile terminal referred to in this document refers specifically to a small handheld mobile communication device with wireless communication functions such as a mobile phone, a PDA (Personal Digital Assistant).
  • a mobile phone as an example, mobile phones, as tools for daily life and business affairs, play an important role in the lives of users.
  • mobile terminals have been further developed.
  • the mainstream mobile communication systems are developed on the basis of cellular systems.
  • the frequency reuse greatly improves the frequency utilization and increases the system capacity, but the result is to expand the service range of users.
  • a handoff must be implemented.
  • the premise of the handover is that the user terminal (UE) needs to know the specific situation of the handover cell before the handover, then the UE needs to have a cell list for the neighboring cell, and the cell list stores the information of the cells.
  • the cell information is obtained from the system message on the network side, and the network sends the cell information to the UE, and the UE obtains information about the cells, such as a cell ID, a cell information value, and the like.
  • the list of neighboring cells in idle mode is from system message 11 (SIB11).
  • the UE forms a neighbor cell list of the serving cell, that is, a cell list of the UE, by receiving neighbor cell information carried in the system message of the network broadcast.
  • the UE selects the cell list to be tested according to the receiving parameter Sx of the serving cell itself and the system parameter Sintrasearch, Sintersearch of the network side, that is, if Sx ⁇ Sintrasearch, the UE must perform measurement of the same frequency cell, and vice versa.
  • the measurement of the same-frequency cell must be performed); if Sx ⁇ Sintersearch, the UE must perform the measurement of the inter-frequency cell, and vice versa (if there is no parameter Sintersearch in the SI, the inter-frequency must also be performed) Cell measurement). Regardless of the type of measurement, the serving cell must be included. For details, refer to 3GPP TS 25.304. In order to ensure the smooth progress of the handover cell, the UE needs to measure these cells and measure the signal quality of these cells to select a suitable cell to camp.
  • the Radio Resource Control (RRC) module of the mobile terminal After confirming the measurement object, the Radio Resource Control (RRC) module of the mobile terminal sends a measurement command to the lower layer, and requires the physical layer to perform periodic primary common control physical channel (P-CCPCH) reception signal code for the cell to be measured.
  • Power (RSCP, Received Signal Code Power) measurement (only RSCP measurement is performed in idle mode), and the measurement result is reported to RRC.
  • the trigger condition of the cell reselection may be determined.
  • the core content of the reselection trigger condition is: There are better cells than the serving cell, and better cells remain best for a period of time.
  • the inherent meaning is that the UE tries to re-select to a better cell, but it must ensure a certain stability and avoid frequent re-selection shocks.
  • the specific criteria for better cells are two: First, the neighboring cell satisfies the cell camping condition (Sx >0); Second, the priority Rn of the cell is greater than the priority Rs of the serving cell. In a specific implementation, when it is found through calculation that there is a better cell, the better cells are arranged in descending order according to Rn as a cell in the reselection list.
  • RRC needs to open a designed reselection timer Treselect to monitor whether the first cell in the reselected cell list (also the current best cell) can remain best for a period of time.
  • the timer overflows and the cell remains the best, the best cell is successfully found, the cell reselection process is initiated, and the re-resident is re-resident to the best cell; and if the timer is overflowed, the newly received measurement value is passed. If it is determined that the best cell has changed, the timer is restarted and the new best cell is monitored.
  • the UE when the UE performs handover, the UE switches to a better cell than the serving cell according to the measurement result, and the handover target cell may be an intra-frequency cell or an inter-frequency cell or a different-system cell. If the UE switches to an inter-frequency cell or a different-system cell, the probability of handover failure is relatively large, which will result in the UE not effectively maintaining the connection with the communication network.
  • the technical problem to be solved by the present invention is to provide a method and device for processing a cell list and a mobile terminal, which can effectively maintain the connection between the mobile terminal and the communication network.
  • a method for processing a cell list including:
  • the mobile terminal establishes, according to the system message, a cell list including a neighboring cell and a current serving cell;
  • the mobile terminal periodically performs signal measurement on the cell in the cell list, and updates the cell list according to the measurement result, so that the neighboring cell with the same frequency as the current serving cell is always located in the cell list with the highest priority.
  • the location, such that the target cell that the mobile terminal switches is a neighboring cell that is co-frequency with the current serving cell.
  • the step of the mobile terminal establishing a cell list including the neighboring cell and the current serving cell according to the system message includes:
  • the mobile terminal divides the neighboring cell into an intra-frequency cell, a different-frequency cell, and a different-system cell, where the same-frequency cell is a neighboring cell that is in the same frequency as the current serving cell, and the different-frequency cell is different from the current serving cell.
  • the same-frequency cell is a neighboring cell that is in the same frequency as the current serving cell
  • the different-frequency cell is different from the current serving cell.
  • a neighboring cell of the same system the different system cell is a neighboring cell different from the current serving cell;
  • the mobile terminal arranges the different system cell, the inter-frequency cell, and the same-frequency cell from top to bottom in the cell list, and places a current serving cell at the end of the cell list.
  • the step of the mobile terminal periodically performing signal measurement on the cell in the cell list, and updating the cell list according to the measurement result includes:
  • the mobile terminal performs signal measurement on the same-frequency cell in the cell list, and performs a bottom-up arrangement on the same-frequency cell in the cell list according to a high to low signal quality;
  • the mobile terminal performs signal measurement on the inter-frequency cell in the cell list, and performs a bottom-up arrangement on the inter-frequency cell in the cell list according to a high to low signal quality; and / or And the mobile terminal performs signal measurement on the different system cell in the cell list, and performs a bottom-up arrangement on the different system cell in the cell list according to a high to low signal quality.
  • processing method further includes:
  • the mobile terminal removes the cell that is prohibited from accessing from the cell list, and moves other cells in the cell list that are located above the blocked access cell.
  • processing method further includes:
  • the mobile terminal When there is an idle location in the cell list to save the new accessible cell, the mobile terminal puts the new accessible cell into the cell list according to the type of the new accessible cell. The bottom of the type cell;
  • the mobile terminal When there is no idle location in the cell list to save the new accessible cell, the mobile terminal performs signal measurement on the new accessible cell, if the signal quality of the new accessible cell is better than If the signal quality of any cell of the same type in the cell list is described, the mobile terminal deletes the same type of cell with the worst signal quality in the cell list, and puts the new accessible cell into the cell list; If the signal quality of the new accessible cell is worse than the signal quality of the same type of cell in the cell list, the mobile terminal discards the information of the new accessible cell.
  • a processing device for a cell list comprising: a receiving module, a storage module, and a processing module, wherein: the receiving module is configured to: receive a system message of a serving cell, where the system message carries a current serving cell of the mobile terminal and a neighboring cell Information;
  • the storage module is configured to: establish, according to the system message, a cell list including a neighboring cell and a current serving cell;
  • the processing module is configured to periodically perform signal measurement on the cell in the cell list, and update the cell list according to the measurement result, to ensure that the neighboring cell with the same frequency as the current serving cell is always located in the cell list.
  • the highest level of the location so that the destination cell that the mobile terminal switches is a neighboring cell that is co-frequency with the current serving cell.
  • the storage module is configured to establish, according to the system message, a cell list including a neighboring cell and a current serving cell according to the following manner:
  • the neighboring cell is divided into a same-frequency cell, a different-frequency cell, and a different-system cell, where the same-frequency cell is a neighboring cell that is in the same frequency as the current serving cell, and the different-frequency cell is in the same system as the current serving cell.
  • a neighboring cell where the different system cell is a neighboring cell different from the current serving cell; and the heterogeneous system cell, the inter-frequency cell, and the same-frequency cell are arranged from top to bottom in the cell list And place the current serving cell at the end of the cell list.
  • the processing module is configured to periodically perform signal measurement on the cell in the cell list according to the following manner, and update the cell list according to the measurement result:
  • the receiving module is further configured to: receive a second system message of the serving cell, where the second system message indicates that a cell in the cell list is prohibited from accessing;
  • the processing module is further configured to: remove the forbidden access cell from the cell list, and move other cells in the cell list that are located above the forbidden access cell.
  • the receiving module is further configured to: receive a third system message of the serving cell, where the third system message indicates that there is a new accessible cell;
  • the processing module is further configured to: when there is an idle location in the cell list to save the new accessible cell, insert the new accessible cell according to the type of the new accessible cell The bottom of the same type of cell in the cell list;
  • the new accessible cell When there is no idle location in the cell list to save the new accessible cell, perform signal measurement on the new accessible cell, if the signal quality of the new accessible cell is better than the cell list If the signal quality of any cell of the same type is deleted, the cell of the same type with the worst signal quality in the cell list is deleted, and the new accessible cell is placed in the cell list; if the new accessible cell is If the signal quality is worse than the signal quality of the same type of cell in the cell list, the information of the new accessible cell is discarded.
  • a mobile terminal includes the above-described processing device of a cell list.
  • the mobile terminal establishes a cell list including the neighboring cell and the current serving cell according to the system message, and periodically performs signal measurement on the cell in the cell list, and updates the cell list according to the measurement result, where the same frequency as the current serving cell
  • the neighboring cell is always located in the highest priority position in the cell list, so that when the mobile terminal performs handover, it is ensured that the mobile terminal can switch to the cell with the same frequency as the current serving cell, and the success rate of the handover is improved, and the mobile terminal is more stably connected.
  • FIG. 1 is a schematic flowchart of a method for processing a cell list according to an embodiment of the present invention
  • FIG. 2 is a structural block diagram of a device for processing a cell list according to an embodiment of the present invention
  • FIG. 3 is a schematic structural diagram of a mobile terminal
  • FIG. 4 is a structural diagram of a cell list saved by an RRC according to an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of a cell change in a cell list according to an embodiment of the present invention
  • FIG. 6 is a schematic diagram of abnormal cell changes in a cell list according to an embodiment of the present invention
  • FIG. 7 is a schematic diagram of a new cell joining a cell list according to an embodiment of the present invention.
  • the embodiments of the present invention are directed to the prior art, where the probability of handover failure when the UE switches to the inter-frequency cell or the different-system cell is relatively large, which may result in the UE not effectively maintaining the connection with the communication network, and providing a cell list.
  • the processing method and device, and the mobile terminal can effectively maintain the connection between the mobile terminal and the communication network.
  • FIG. 1 is a schematic flowchart of a method for processing a cell list according to an embodiment of the present invention. As shown in FIG. 1 , this embodiment includes:
  • Step 101 The mobile terminal receives a system message of the serving cell, where the system message carries information about the current serving cell of the mobile terminal and the neighboring cell.
  • Step 102 The mobile terminal establishes, according to the system message, a cell list including the neighboring cell and the current serving cell.
  • Step 103 The mobile terminal periodically performs signal measurement on the cell in the cell list, and updates the cell list according to the measurement result, so that the neighboring cell with the same frequency as the current serving cell is always located at the highest priority position in the cell list, so as to make the mobile
  • the target cell of the terminal handover is a neighboring cell with the same frequency as the current serving cell.
  • the cell list processing method of the present invention the mobile terminal establishes a cell list including the neighboring cell and the current serving cell according to the system message, and periodically performs signal measurement on the cell in the cell list, and updates the cell list according to the measurement result, where
  • the neighboring cell with the same frequency of the current serving cell is always located at the highest priority in the cell list, so that when the mobile terminal performs handover, it is ensured that the mobile terminal can switch to the cell with the same frequency as the current serving cell, and the success rate of the handover is improved.
  • the terminal provides a more stable access to the network to provide guarantee.
  • the cell list processing apparatus of this embodiment includes a receiving module 20, a storage module 21, and a processing module. 22, where:
  • the receiving module 20 is configured to: receive a system message of the serving cell, where the system message carries information about the current serving cell of the mobile terminal and the neighboring cell;
  • the storage module 21 is configured to: establish a cell list including the neighboring cell and the current serving cell according to the system message;
  • the processing module 22 is configured to: periodically perform signal measurement on the cell in the cell list, and update the cell list according to the measurement result, to ensure that the neighboring cell with the same frequency as the current serving cell is always located at the highest priority position in the cell list, so that The target cell that is handed over by the mobile terminal is a neighboring cell that is co-frequency with the current serving cell.
  • the storage module 21 is configured to: according to the system message, establish a cell list including the neighboring cell and the current serving cell: the neighboring cell is divided into an intra-frequency cell, an inter-frequency cell, and a different-system cell, where the same-frequency cell a neighboring cell that is in the same frequency as the current serving cell, the inter-frequency cell is a neighboring cell that is in the same system as the current serving cell, and the different-system cell is a neighboring cell different from the current serving cell; and the hetero-system cell is in the cell list.
  • the inter-frequency cell and the intra-frequency cell are arranged from top to bottom, and the current serving cell is placed at the end of the cell list.
  • the processing module 22 is configured to periodically perform signal measurement on the cells in the cell list according to the following manner, and update the cell list according to the measurement result: performing signal measurement on the same-frequency cell in the cell list, and according to the signal quality from high to low , performing a bottom-up arrangement of the same-frequency cells in the cell list; and/or
  • the receiving module 20 is further configured to: receive a system message of the serving cell, where the system message indicates that a cell in the cell list is prohibited from accessing;
  • the processing module 22 is further configured to remove the cell from the cell list and move other cells in the cell list above the cell downward.
  • the receiving module 20 is further configured to: receive a system message of the serving cell, where the system message refers to Showing a new accessible cell;
  • the processing module 22 is further configured to: when there is an idle location in the cell list to save the cell, the cell is placed in the bottom of the same type of cell in the cell list according to the type of the cell;
  • the cell When there is no idle location in the cell list to save the cell, the cell is measured. If the signal quality of the cell is better than the signal quality of any cell of the same type in the cell list, the worst signal quality in the cell list is deleted. Type the cell, and put the cell into the cell list; if the signal quality of the cell is worse than the signal quality of the same type of cell in the cell list, the information of the cell is discarded.
  • the mobile terminal establishes a cell list including the neighboring cell and the current serving cell according to the system message, and periodically performs signal measurement on the cell in the cell list, and updates the cell list according to the measurement result, where
  • the neighboring cell with the same frequency of the current serving cell is always located at the highest priority in the cell list, so that when the mobile terminal performs handover, it is ensured that the mobile terminal can switch to the cell with the same frequency as the current serving cell, and the success rate of the handover is improved.
  • the terminal provides a more stable access to the network to provide guarantee.
  • the embodiment of the invention further provides a mobile terminal, which comprises the above-mentioned processing device of the cell list.
  • the method for processing the cell list of the present invention is further described below with reference to FIG. 3-7.
  • the mobile terminal according to the embodiment of the present invention includes Time Division-Synchronous Code Division Multiple Access (TD-SCDMA).
  • TD-SCDMA Time Division-Synchronous Code Division Multiple Access
  • the mobile terminal includes a 3-layer protocol stack module, and layer 1 is a physical layer; layer 2 includes a medium access control sub-layer protocol (MAC, Media Access Control) module and wireless The Link Control Layer Protocol (RLC) module; the Radio Resource Control (RRC) module acts as Layer 3 to control the lower layer and establish and maintain a cell list.
  • layer 1 is a physical layer
  • layer 2 includes a medium access control sub-layer protocol (MAC, Media Access Control) module and wireless The Link Control Layer Protocol (RLC) module
  • RLC Radio Resource Control
  • RRC Radio Resource Control
  • the mobile terminal After the mobile terminal camps on the cell, it receives a system message such as SIB11 of the serving cell, and the RRC constructs a cell list according to the neighbor cell information in the system message:
  • the intra-frequency cell information is obtained from the Intra-frequency measurement system information, and the cells are sorted to establish a cell list.
  • the inter-frequency cell information is obtained from the inter-frequency measurement system information, and the cells are sorted to establish a cell. List;
  • the inter-system cell information is obtained from the Inter-RAT measurement system information, and the cells are sorted to establish a cell list.
  • the serving cell is ranked at the end of the cell list.
  • FIG. 5 is a process in which RRC performs optimization processing on a cell in a cell list, and is mainly divided into two steps:
  • the RRC sends the cell information in the cell list to the lower layer, and the lower layer performs cell signal measurement according to the cell information.
  • the measurement task of the cell in the cell list is sent, and the MAC sends the frequency and ID information of the cell to the LI, and the L1 arranges the measurement according to the idle task, and reports the cell to the cell within the specified time. Measurement results.
  • the task of the same-frequency cell is first sent, and then the task of the inter-frequency cell is sent, and finally the measurement task of the different-system cell is sent. If there is no inter-frequency cell, or there is no different system cell, the corresponding measurement task may not be initiated;
  • the lower layer reports the measurement result to the RRC.
  • the RRC sorts the cells in the cell list according to the measurement result.
  • the principle is that the cell measurement result (such as the signal strength) is high to low, and the cell list is from the bottom to the top. Sorting, when the mobile terminal performs cell selection, it selects from the bottom of the cell list, so that the ordering can ensure that the mobile terminal preferentially selects a better cell when performing cell selection.
  • sorting keep the queues of the same frequency cell, the different frequency cell, and the different system cell separately. The advantage of this is to complete the switching of the same frequency cell as much as possible, reduce the failure rate of the switching when the inter-frequency switching, and reduce the occurrence of the different system switching. The probability.
  • the RRC finds that some cells located above the cell list are better than the cells located below the cell list according to the measurement result, or if the signal strength of the cells is higher than the cells located below the cell list, the RRC re-establishes the cells in the cell list. Sorting; If there is a case where the cells previously listed in the cell list are worse than the cells ranked above the cell list in the latest measurement result, the RRC reorders the cells and ranks them above the cell list.
  • abnormal conditions may occur, such as RRC receiving
  • RRC Radio Resource Control
  • the RRC obtains new cell information in the new system message, as shown in FIG. 7, the RRC will perform different operations according to the new cell information:
  • the RRC will directly discard the information of the cell, and the cell information will not be placed in the cell list.
  • the new cell is an accessible cell, then the RRC will be placed according to the cell type of the cell: If it is a co-frequency cell, the RRC places the cell at the bottom of the same-frequency cell, and indicates that there is no measurement.
  • the information is sent to the lower layer of the measurement task of the intra-frequency cell, and the lower layer is required to insert the measurement task into the idle task, and the measurement result is provided to the RRC as soon as possible, and then the RRC performs the sorting according to the measurement result of each cell, and the ranking method is as shown in FIG.
  • the method is the same, and is not described here; if it is an inter-frequency cell, the RRC places the cell at the bottom of the inter-frequency cell, and requests the lower layer to report the measurement result of the inter-frequency cell, which is consistent with the previous one; If it is a different system cell, the cell is placed at the bottom of the different system cell, and the cells of the different system are sorted according to the measurement result, which will not be described in detail here.
  • the new cell is an accessible cell, but at this time, the cell list has no location to save the new cell.
  • the RRC will temporarily store the cell information, first measure the new cell, wait After the low-level measurement is completed, the measurement result is reported, and the measurement result of the cell is compared with the cell measurement result in the cell list of the same type, and the comparison is performed in order from high to low, if the measurement result of the cell is better than that in the list. If any one of the same type of cells is used, the RRC deletes the worst cell information in the same type of cell in the list, puts the new cell information into the cell list, and places it in the appropriate queue, that is, according to the measurement result. The same type of cell and this cell are sorted. If the cell is worse than the same type of cell in the list, the RRC discards the information of the cell and does not put it in the cell list.
  • the modules may be implemented in software for execution by various types of processors.
  • an identified executable code module can include one or more of the computer instructions
  • a logical or logical block for example, can be constructed as an object, procedure, or function. Nonetheless, the executable code of the identified modules need not be physically located together, but may include different instructions stored in different bits. When these instructions are logically combined, they form a module and implement the specifications of the module. purpose.
  • the executable code module can be a single instruction or a number of instructions, and can even be distributed over multiple different code segments, distributed among different programs, and distributed across multiple memory devices.
  • operational data can be identified within the module and can be implemented in any suitable form and organized within any suitable type of data structure. The operational data may be collected as a single data set, or may be distributed at different locations (including on different storage devices), and may at least partially exist as an electronic signal on a system or network.
  • the module can be implemented by software, considering the level of the existing hardware process, the module can be implemented in software. Without considering the cost, a person skilled in the art can construct a corresponding hardware circuit to implement the corresponding function.
  • the hardware circuitry includes conventional Very Large Scale Integration (VLSI) circuits or gate arrays as well as existing semiconductors such as logic chips, transistors, or other discrete components.
  • VLSI Very Large Scale Integration
  • Modules can also be implemented with programmable hardware devices such as field programmable gate arrays, programmable array logic, programmable logic devices, and the like.
  • the sequence numbers of the steps are not used to limit the sequence of the steps. For those skilled in the art, the steps of the steps are changed without any creative work. It is also within the scope of the invention.
  • the mobile terminal establishes a cell list including the neighboring cell and the current serving cell according to the system message, and periodically performs signal measurement on the cell in the cell list, and updates the cell list according to the measurement result, where the same frequency as the current serving cell
  • the neighboring cell is always located in the highest priority position in the cell list, so that when the mobile terminal performs handover, it is ensured that the mobile terminal can switch to the cell with the same frequency as the current serving cell, and the success rate of the handover is improved, and the mobile terminal is more stably connected.
  • the present invention has strong industrial applicability.

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Abstract

L'invention a trait au domaine des communications mobiles et concerne un procédé et un dispositif pour traiter une liste de cellules et un terminal mobile. Le procédé pour traiter une liste de cellules comprend les étapes consistant à : recevoir, par un terminal mobile, un message système depuis une cellule de desserte, le message système contenant des informations concernant une cellule de desserte actuelle et une cellule adjacente du terminal mobile; établir, par le terminal mobile, une liste de cellules contenant la cellule adjacente et la cellule de desserte actuelle conformément au message système; effectuer périodiquement, par le terminal mobile, une mesure de signal sur les cellules dans la liste de cellules, et mettre à jour, par le terminal mobile, la liste de cellules conformément au résultat de mesure pour faire en sorte que la cellule adjacente possédant la même fréquence que la cellule de desserte actuelle occupe en permanence une position prioritaire dans la liste de cellules de manière à ce qu'une cellule cible vers laquelle le terminal mobile bascule corresponde à la cellule adjacente possédant la même fréquence que la cellule de desserte actuelle. La solution technique selon l'invention permet de maintenir efficacement la connexion entre un terminal mobile et un réseau de communication.
PCT/CN2012/076758 2012-01-31 2012-06-12 Procédé et dispositif pour traiter une liste de cellules et terminal mobile WO2013113200A1 (fr)

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