WO2011103823A2 - Terminal et procédé pour éviter l'effet ping-pong dans la resélection de cellule - Google Patents

Terminal et procédé pour éviter l'effet ping-pong dans la resélection de cellule Download PDF

Info

Publication number
WO2011103823A2
WO2011103823A2 PCT/CN2011/072910 CN2011072910W WO2011103823A2 WO 2011103823 A2 WO2011103823 A2 WO 2011103823A2 CN 2011072910 W CN2011072910 W CN 2011072910W WO 2011103823 A2 WO2011103823 A2 WO 2011103823A2
Authority
WO
WIPO (PCT)
Prior art keywords
cell
value
reselection
signal strength
signal quality
Prior art date
Application number
PCT/CN2011/072910
Other languages
English (en)
Chinese (zh)
Other versions
WO2011103823A3 (fr
Inventor
刘珺
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to CN201180000270.7A priority Critical patent/CN102204344B/zh
Priority to PCT/CN2011/072910 priority patent/WO2011103823A2/fr
Publication of WO2011103823A2 publication Critical patent/WO2011103823A2/fr
Publication of WO2011103823A3 publication Critical patent/WO2011103823A3/fr

Links

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
    • H04W36/00837—Determination of triggering parameters for hand-off
    • 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

Definitions

  • the present invention relates to the field of communication technologies, and in particular, to a method and a terminal for avoiding ping-pong reselection in a cell.
  • the Universal Mobile Telecommunication System uses Wideband Code Division Multiple Access (WCDMA) on the basis of the GSM system (WCDMA, Wideband). Code Division Multiple Access), which provides packet-based text, digital voice, video and multimedia data services to mobile and computer end users around the world at rates greater than 21 Mbps.
  • WCDMA Wideband Code Division Multiple Access
  • the UMTS system includes a core network (CN, Core Network) and multiple radio network subsystems (RNS, Radio Network Subsystem).
  • the RNS constitutes a UMTS terrestrial radio access network (UTRAN).
  • Each RNS has a radio network controller (RNC) and a plurality of base station nodes (NodeBs).
  • RNC radio network controller
  • NodeBs base station nodes
  • Each RNC is responsible for giving it
  • Each of the controlled NodeBs allocates radio resources, and the NodeB provides the radio resources to the user equipment (UE, User equipment).
  • the radio resources are configured on a cell basis, and one cell is covered by a radio resource provided by the NodeB.
  • the UE establishes a wireless channel for transmitting and receiving data by using the radio resources of the cell in which it is located.
  • cell reselection When the UE does not establish a dedicated radio channel, if it moves from one cell to another, a cell reselection will be triggered. In the process of cell reselection, the UE measures the signal strength and signal quality received from the neighboring cells, compares the signal strengths, and finally selects a cell. The purpose of cell reselection is to accurately find the best cell in which a UE can camp and obtain service.
  • the UE In order to perform cell reselection, the UE first acquires a neighbor cell list including the same frequency cell, the inter-frequency cell, and the different system cell. This list is obtained by the system information block received on the broadcast channel of the serving cell. Thereafter, the UE measures signal strength and signal quality of the neighboring cells, and calculates a signal strength S value and a signal quality S value of the neighboring cell, and a signal strength R value or a signal quality R value;
  • the signal strength S value is the difference between the signal strength of the neighboring cell measured by the UE and the lowest signal strength required for cell selection; the signal quality S value is the signal quality of the neighboring cell measured by the UE and the minimum signal quality required for cell selection.
  • the difference between the signal strength R value is the difference between the signal strength measurement value of the cell selection and reselection and the cell reselection hysteresis signal strength; the signal quality R value is the signal quality measurement value of the cell selection and reselection and the cell reselection hysteresis The difference in signal quality.
  • a cell with a signal strength S value and a signal quality S value greater than the signal strength S minimum value and the signal quality S minimum value can enter the rank of the candidate serving cell, and the signal strength S minimum value and the signal quality S minimum value are the monthly good service cells.
  • the UE selects one of the best cells as the serving cell.
  • the specific method is: the UE determines whether the calculated signal strength R value or the signal quality R value is obtained by using the system information block received on the broadcast channel of the serving cell, and sorts the calculated signal strength R value or the signal quality R value according to the size relationship. A cell having a maximum signal strength R value or a signal quality R value is used as a target cell for reselection.
  • the signal quality of a cell is mainly determined by the degree of interference of other cells using the same frequency point.
  • the signal strength of the cell is mainly determined by the distance of the UE from the NodeB. In this way, the signal strength is weaker in the cell area away from the NodeB, but if the distances of other cells using the same frequency point are relatively long, the interference from other cells is relatively small, so the signal quality may still be in these places. Better.
  • the UE calculates the signal strength R value through the judgment of the system information block received on the broadcast channel of the serving cell, after the reselection occurs, the UE enters a serving cell with the best signal strength (recorded as the A cell).
  • the signal quality of the A cell is very weak, so that after the A cell becomes the serving cell, its signal quality S value cannot meet the minimum signal quality S of the serving cell, the UE must reselect, and select a signal quality S value to satisfy the service.
  • the cell required by the cell (denoted as B cell), in the following time, by calculating and sorting the signal strength R value, the A cell becomes the cell with the best signal strength again, and the UE reselects to the A cell, and then The signal quality S value does not meet the requirements of the serving cell, and is reselected to the B cell. This repeated ping-pong effect appears.
  • the UE When the UE calculates the signal quality R value through the judgment of the system information block received on the broadcast channel of the serving cell, after the reselection occurs, the UE enters a serving cell with the best signal quality (remember It is a C cell), but the signal strength of the C cell is very weak, so that after the C cell becomes a serving cell, its signal strength S value cannot meet the minimum signal strength S of the serving cell, and the UE must reselect and select a signal.
  • the cell whose strength S value satisfies the requirements of the serving cell (referred to as D cell), the latter principle is the same as that of the A cell and the B cell in the upper segment, and the ping-pong effect of the C cell and the D cell also appears.
  • the UE When performing cell reselection, the UE needs to open the radio frequency transceiver circuit to receive the system information sent by the NodeB on the broadcast channel, and also needs to open other circuit logics to perform necessary operations. This will increase UE power consumption and shorten standby time. When the ping-pong effect is reselected, the power consumption will be more serious. Therefore, ping pong reselection needs to be avoided in UMTS.
  • one of the existing technical solutions adds a hysteresis Qhyst to the signal strength R value or the signal quality R value of the serving cell, and the signal strength R value and signal quality of the neighboring cell.
  • the offset amount Qoffset is subtracted from the R value. So that once the UE selects one cell as the serving cell, even if the signal strength R value or the signal quality R value of the serving cell is lower than the neighboring cell, as long as the phase difference does not exceed the amount controlled by Qhyst and Qoffset, the UE will not A cell reselection occurs.
  • the prior art scheme 2 is a time limit for cell reselection. After sorting the signal strength R value or the signal quality R value of each cell, if the cell with the highest signal strength R value or the signal quality R value is not the serving cell, the UE does not immediately perform cell reselection, but waits for a period of time Treselection Only during this Treselection time, the R value of the cell is always higher than the serving cell, and the UE performs cell reselection.
  • the UE Since the signal strength S value and the signal quality S value are both greater than the signal strength S minimum value and the signal quality S minimum value, it is a necessary condition for the UE to select a cell as a serving cell. If the request of the serving cell cannot be satisfied, the UE must immediately Perform cell reselection. For a cell with the signal strength R value or the signal quality R value corrected by the prior art, if the signal strength S value and the signal quality S value cannot satisfy the signal strength S minimum value and the signal quality S minimum value, The UE still cannot use it as a serving cell and must reselect it immediately.
  • the second technical solution is to avoid the frequent occurrence of the ping-pong effect by increasing the waiting time Treselection and then determining whether to initiate the cell reselection after the cell whose ranking is the largest R value is not the serving cell, but the signal strength S value and the signal
  • the quality S value is greater than the signal strength S minimum value and the signal quality S minimum value is whether the UE can select a cell
  • the UE still has to perform new cell selection immediately, without Subject to the Trelsection. Summary of the invention
  • the embodiments of the present invention provide a method and a terminal for avoiding ping-pong reselection in a cell, which can effectively avoid frequent occurrence of ping-pong reselection in a cell.
  • a method for avoiding ping-pong reselection in a cell comprising:
  • the R criterion is to sort all cells whose signal strength and signal quality are greater than or equal to the lowest service threshold of the serving cell according to signal strength or signal quality;
  • the optimal cell is not the current serving cell, it is determined whether the signal strength and signal quality of the optimal cell are greater than or equal to a reselection threshold, and the reselection threshold is higher than a minimum service threshold of the serving cell;
  • a terminal comprising:
  • a selecting unit configured to select, according to the S criterion, a cell that can serve as a candidate serving cell from a current serving cell and a neighboring non-serving cell, where the S criterion is that the signal strength and the signal quality are greater than or equal to a minimum serving threshold of the serving cell;
  • a determining unit configured to determine, according to an R criterion, an optimal cell in the candidate serving cell selected by the selecting unit, where the R criterion is to perform the candidate serving cell selected by the selecting unit according to signal strength or signal quality Sort
  • a determining unit configured to determine, when the optimal cell determined by the determining unit is not the current serving cell, whether the signal strength and the signal quality of the optimal cell are greater than or equal to a reselection threshold, where the reselection threshold is higher than the service Minimum service threshold of the community;
  • a reselecting unit configured to start cell reselection if the signal strength and signal quality of the optimal cell determined by the determining unit are greater than or equal to a reselection threshold.
  • the embodiment of the invention improves the reselection threshold of the cell reselection, so that the signal strength is good, but the signal quality is poor, or the signal strength is poor, and the cell with good signal quality does not enter the candidate range of the reselected cell, thereby effectively avoiding The frequent occurrence of ping-pong reselection in the community.
  • Embodiment 1 is a schematic flow chart of a method according to Embodiment 1 of the present invention.
  • FIG. 2 is a schematic flowchart of a method according to Embodiment 2 of the embodiment of the present invention.
  • FIG. 3 is a schematic diagram of an embodiment of an apparatus according to an embodiment of the present invention.
  • FIG. 4 is a schematic diagram of another embodiment of an apparatus according to an embodiment of the present invention. detailed description
  • Embodiments of the present invention provide a method for avoiding cell ping-pong reselection in a cell that can achieve good signal strength but poor signal quality, or poor signal strength and good signal quality, and does not enter the candidate range of the reselected cell.
  • the embodiment of the present invention further provides a corresponding terminal for avoiding cell ping-pong reselection.
  • a method for avoiding ping-pong reselection in a cell according to Embodiment 1 of the present invention includes:
  • the signal strength S minimum value and the signal quality S minimum value are the minimum service threshold S criteria satisfying the serving cell.
  • the signal strength S value of the cell is greater than or equal to the signal strength S minimum value of the serving cell, and the signal quality S value of the cell is greater than or equal to The serving cell signal quality S is the minimum; only the signal strength S value and the signal quality S value in the current serving cell and the neighboring cell are greater than or equal to the minimum serving threshold of the serving cell, and can be used as the candidate serving cell.
  • the R criterion includes: all cells whose signal strength S value is greater than or equal to the signal strength S minimum value of the serving cell and whose signal quality S value is greater than or equal to the signal quality S minimum value of the serving cell are sorted according to the signal strength R value or the signal quality R value;
  • the terminal can generally obtain the candidate cell and the optimal cell in such a manner: Obtain a list of neighbor cells including the same frequency cell, the inter-frequency cell, and the different system cell, and the list is adopted. Obtaining the system information block received on the broadcast channel of the serving cell; then the terminal measures the signal strength and signal quality of the current serving cell and each neighboring cell in the neighbor cell list;
  • the S value and the R value calculation formula are used to calculate the signal strength S value and the signal quality S value and the signal strength R value or the signal quality R value of each adjacent cell;
  • the specific case of determining the optimal cell in the candidate serving cell according to the R criterion is that the cell whose signal strength S value is greater than or equal to the minimum value of the signal strength S and the signal quality S value is greater than or equal to the minimum value of the signal quality S according to the signal strength R value or signal
  • the quality R values are sorted, and the cell with the highest signal strength R value or the signal quality R value is determined as the optimal cell;
  • the terminal calculates the signal strength R value or the signal quality R value is determined by the system information block received on the broadcast channel of the serving cell, and the system information block carries information for calculating the signal strength R value or the signal quality R value, and the system The information block carries only one of the information, so the terminal only calculates one R value and only sorts one R value.
  • the optimal cell is not the current serving cell, determine whether the signal strength and signal quality of the optimal cell are greater than or equal to the reselection threshold, and the reselection threshold is higher than the minimum service threshold of the serving cell; if the reselection threshold is greater than or equal to Go to step 104, if it is less, go to step 105;
  • the reselection threshold includes signal strength S reselection value and signal quality S reselection value, signal strength S reselection value is greater than the serving cell signal strength S minimum value, signal quality S reselection value is greater than the serving cell signal quality S minimum value;
  • Determining whether the signal strength S value and the signal quality S value of the optimal cell satisfy the reselection threshold specifically determining whether the signal strength S value of the optimal cell is greater than or equal to the S reselection value of the signal strength, and simultaneously It is also determined whether the signal quality s value of the optimal cell is greater than or equal to the s reselection value of the signal quality.
  • the signal strength S value and the signal quality S value of the optimal cell are greater than or equal to the reselection threshold, including: the signal strength S value of the optimal cell is greater than or equal to the signal strength S reselection value, and the signal quality S value of the optimal cell It is greater than or equal to the signal quality S reselection value; if both conditions are satisfied at the same time, the cell reselection is initiated, and the optimal cell is used as the reselected target cell.
  • Optimal cell signal strength S value and signal quality S value does not meet the reselection threshold including three conditions, specifically:
  • the optimal cell signal strength S value is greater than or equal to the signal strength S reselection value, but the optimal cell signal quality S value is smaller than the signal quality S reselection value;
  • the optimal cell signal strength S value is smaller than the signal strength S reselection value, but the optimal cell signal quality S is greater than or equal to the signal quality S reselection value;
  • the signal strength S of the optimal cell is smaller than the signal strength S reselection value, and the signal quality S of the optimal cell is smaller than the signal quality S reselection value;
  • the terminal does not initiate cell reselection and continues to camp on the current serving cell.
  • it is required to determine whether the signal strength and signal quality of the optimal cell meet the reselection threshold, and the reselection threshold is higher than the lowest service threshold of the serving cell; only the signal strength and signal quality of the optimal cell satisfy the reselection
  • cell reselection is initiated; compared to the prior art, this embodiment improves the reselection threshold of signal strength and signal quality, so that some signal strength is good but signal quality is poor, or signal quality A cell that is very good but has poor signal strength does not enter the candidate range of the reselected cell, effectively avoiding the occurrence of the ping-pong effect.
  • the reduction of the number of times of ping-pong reselection in the cell also effectively reduces the power consumption of the terminal and prolongs the standby time.
  • a second embodiment of a method for avoiding cell ping-pong reselection in an embodiment of the present invention includes:
  • a cell that can serve as a candidate serving cell from the current serving cell and the neighboring non-serving cell is that the signal strength and the signal quality are greater than or equal to the minimum service threshold of the serving cell.
  • the R criterion is to sort all cells whose signal strength and signal quality are greater than or equal to the lowest service threshold of the serving cell according to signal strength or signal quality.
  • the optimal cell is not the current serving cell, determine whether the signal strength and signal quality of the optimal cell are greater than or equal to the reselection threshold, and further include starting a check timer, and checking that the timer running time is preset.
  • the inspection time T can be any value from 1 second to several tens of seconds, and the value of the inspection time T can be adjusted.
  • 204. Determine whether the signal strength S value and the signal quality S value of the optimal cell are always greater than or equal to the reselection threshold within the time T during which the check timer is running, and the reselection threshold is higher than the minimum service threshold of the serving cell; T is always greater than or equal to the reselection threshold, step 205 is performed, if it is not always greater than or equal to the reselection threshold, step 206 is performed;
  • Determining whether the signal strength and signal quality of the optimal cell are always greater than or equal to the reselection threshold within the time T during which the check timer is running includes continuously determining whether the signal strength S value of the optimal cell is always greater than or equal to the check timer running time. The signal strength S is reselected, and it is continuously determined whether the signal quality S value of the optimal cell is always greater than or equal to the signal quality S reselection value.
  • the step of starting cell reselection is specifically: if the signal strength of the optimal cell is within the time period of checking the timer operation The signal quality is always greater than or equal to the reselection threshold, and the cell reselection is initiated.
  • the optimal cell signal strength S value and signal quality S value are not always greater than or equal to the reselection threshold, and cell reselection is not initiated;
  • the signal strength S value of the optimal cell is always greater than or equal to the signal strength S reselection value, but the signal quality S value of the optimal cell is not always greater than or equal to the signal quality S reselection value;
  • the signal strength of the optimal cell S value is not always greater than or equal to the signal strength S reselection value, but the signal quality S value of the optimal cell is always greater than or equal to the signal quality S reselection value;
  • the signal strength of the optimal cell S value is not always greater than or equal to the signal strength S reselection value, and the signal quality S value of the optimal cell is not always greater than or equal to the signal quality S reselection value.
  • a step of determining whether the signal strength and the signal quality of the optimal cell meets the reselection threshold is added, and an inspection time T is added, so that it is necessary to continuously determine the signal of the optimal cell within the inspection time T. Whether the strength and signal quality always meet the reselection threshold, cell reselection will only occur if it is always satisfied.
  • this embodiment improves the signal strength and signal quality threshold of reselection, and also adds the inspection time T, so that some signal strength is good but the signal quality is poor, or the signal quality is good but A cell with poor signal strength will not enter the candidate range of the reselected cell, effectively avoiding the occurrence of the ping-pong effect.
  • the terminal can generally obtain the candidate cell and the optimal cell in such a manner that the terminal obtains the neighbor cell list from the system information block received on the broadcast channel of the serving cell, and obtains the obtained
  • the neighbor cell list includes a current serving cell and four neighboring cells, which are a current serving cell, a cell N1, a cell N2, a cell N3, and a cell N4.
  • the terminal measures the signal strength and signal quality of the current serving cell and the neighboring cell, that is, the signal strength and signal quality of the current serving cell, cell N1, cell N2, cell N3, and cell N4.
  • the signal strength S value and the signal quality S value of each cell are calculated according to the measured signal strength and signal quality of the current serving cell and each neighboring cell, and the signal strength R value or the signal quality R value is calculated simultaneously. Assuming that the information obtained from the system information module is information of the signal strength, the signal strength R value is calculated. The calculation result corresponds to: The signal strength S of the current serving cell is SrO, and the signal quality is S.
  • the value is SqO, the signal strength R value RrO; the signal strength S value of the cell N1 is Sri, the signal quality S value is Sql, the signal strength R value Rrl; the signal strength S value of the cell N2 is Sr2, and the signal quality S value is Sq2, Signal strength R value Rr2; cell N3 signal strength S value is Sr3, signal quality S value is Sq3, signal strength R value Rr3; cell N4 signal strength S value is Sr4, signal quality S value is Sq4, signal strength R value Rr4.
  • the signal quality S value is SrO
  • the signal strength S of the cell N1 is Sri
  • the signal quality S is Sql
  • the signal strength S of the cell N2 is Sr2
  • the signal quality S is Sq2
  • the signal strength S of the cell N3 is Sr3, and the signal quality is S value.
  • the signal strength S value of the cell N4 is Sr4, and the signal quality S value is Sq4, which satisfies the S criterion, that is, SrO, Sri, Sr2, Sr3 and Sr4 are respectively greater than the minimum value of the signal strength S, and, SqO, Sql , Sq2, Sq3 and Sq4 are respectively greater than the minimum value of the signal quality S.
  • the current serving cell and cell N1, cell N2, cell N3 and cell N4 are all candidate cell.
  • the current serving cell, cell N1, cell N2, cell N3 and cell N4 are sorted according to the signal strength R value, that is, RrO, Rrl, Rr2, Rr3 and Rr4 are sorted, and the largest of RrO, Rrl, Rr2, Rr3 and Rr4 is determined.
  • the value of the cell with the highest signal strength R is the optimal cell, and the value of the application scenario Rr2 is the largest, that is, the cell N2 is the optimal cell.
  • the check timer is started, and the running time of the timer is checked as a preset check time T.
  • the relationship between the Sr2 value and the reselected Sr value is continuously determined from the start of the check timer, and the Sq2 value and the reselected Sq value are simultaneously determined. relationship. If the Sr2 value is always greater than or equal to the reselected Sr value within the check time T, and the Sq2 value is always greater than or equal to the reselected Sq value, then the reselection is initiated, and the cell N2 is taken as the reselected target cell.
  • the reselection is not initiated and the terminal continues to camp on the current serving cell.
  • the signal strength Sr2 value is much larger than the signal strength reselection Sr value, but the signal quality Sq2 value is much smaller than the reselected Sq value, and no reselection occurs. In this way, the signal strength is good, but the cell with poor signal quality does not enter the candidate range of the reselected cell, thus effectively avoiding the occurrence of the ping-pong effect.
  • the application scenario is that the current serving cell and the other four neighboring cells satisfy the condition of the serving cell. If the calculated signal strength S value of the cell N3 is Sr34 ⁇ , which is much larger than the signal strength S minimum, but the cell N3 The signal quality S value Sq3 is smaller than the minimum signal quality S, and the cell N3 cannot enter the rank of the candidate serving cell. If the other three neighboring cells satisfy the S criterion and the current serving cell also satisfies the S criterion, then the signal strength R value Sorting, only in the current serving cell and cell N1, small Zone N2 is performed between cell N4.
  • the terminal in the embodiment of the present invention includes:
  • the selecting unit 301 is configured to select, from the current serving cell and the adjacent non-serving cells, a cell that can serve as a candidate serving cell according to the S criterion.
  • the determining unit 302 is configured to determine, according to the R criterion, an optimal cell among the candidate serving cells selected by the selecting unit 301.
  • the determining unit 303 is configured to determine, when the optimal cell determined by the determining unit 302 is not the current serving cell, whether the signal strength and the signal quality of the optimal cell are greater than or equal to a reselection threshold.
  • the reselecting unit 304 is configured to start cell reselection if the signal strength and signal quality of the optimal cell determined by the determining unit 303 are greater than or equal to the reselection threshold.
  • the determining unit 302 determines the optimal cell. If the optimal cell is not the current serving cell, the determining unit 303 determines the signal strength of the optimal cell. And whether the signal quality is greater than or equal to the reselection threshold, and the reselection threshold is higher than the minimum service threshold of the serving cell. If the signal strength and signal quality of the optimal cell are greater than or equal to the reselection threshold, reselection unit 304 initiates cell reselection.
  • the terminal that raises the reselection threshold makes some signal strengths are good but the signal quality is poor, or A cell with good signal quality but poor signal strength will not enter the candidate range of the reselected cell, effectively avoiding the occurrence of the ping-pong effect.
  • the embodiment of the present invention may further include: an check timer 403, configured to start timing, and notify the determining unit to start determining whether the signal strength and signal quality of the optimal cell are greater than or equal to a reselection threshold, and When the timing is ended, the notification judgment unit stops determining whether the signal strength and the signal quality of the optimal cell are greater than or equal to the reselection threshold, and the running time of the check timer 403 is the preset inspection time 1 ⁇
  • the determining unit 404 is further configured to: after the determining unit 402 determines the optimal cell, determine whether the signal strength and the signal quality of the optimal cell are always greater than or equal to the reselection threshold in the time when the check timer 403 is running;
  • the reselecting unit 405 is further configured to: during the running time of the check timer 403, the determining unit 404 determines When the signal strength and signal quality of the optimal cell are always greater than or equal to the reselection threshold, cell reselection is initiated.
  • the minimum service threshold of the serving cell includes: a signal strength S minimum value and a signal quality S minimum value; the S criterion includes: the signal strength S value of the cell is greater than or equal to the signal strength S minimum value of the serving cell, and the signal quality S value of the cell is greater than Equal to the minimum value of the signal quality S of the serving cell;
  • the R criterion includes: all cells whose signal strength S value is greater than or equal to the signal strength S minimum value of the serving cell and whose signal quality S value is greater than or equal to the signal quality S minimum value of the serving cell are sorted according to the signal strength R value or the signal quality R value;
  • the reselection threshold includes signal strength S reselection value and signal quality S reselection value, signal strength S reselection value is larger than the serving cell signal strength S minimum value, and signal quality S reselection value is greater than the serving cell signal quality S minimum value.
  • the determining unit 402 is further configured to: according to the signal strength R value or the signal quality R value, the cells whose all signal strength S values are greater than or equal to the signal strength S minimum value of the serving cell and the signal quality S value is greater than or equal to the signal quality S minimum value of the serving cell. Sorting is performed, and the cell with the highest signal strength R value or the signal quality R value is selected as the optimal cell.
  • the reselecting unit 405 is further configured to: when the signal strength S value of the optimal cell is greater than or equal to the signal strength S reselection value, and when the signal quality S value of the optimal cell is greater than or equal to the signal quality S reselection value, start the cell Re-election.
  • the specific working process of the terminal is: after the selecting unit 401 selects the candidate serving cell, the determining unit 402 determines the optimal cell, and if the optimal cell is not the current serving cell, the check timer 403 is started. And at the start timing, the notification judging unit 404 starts to judge whether the signal strength and the signal quality of the optimal cell are greater than or equal to the reselection threshold, and notifies the judging unit to stop determining whether the signal strength and the signal quality of the optimal cell are stopped at the end timing. If the threshold is greater than or equal to the reselection threshold, the running time of the check timer is a preset check time T.
  • the judgment unit 404 continues to determine the signal strength and signal quality of the optimal cell.
  • the reselection unit 405 is always greater than or equal to the reselection threshold, and the reselection unit 405 initiates cell reselection.
  • the device that increases the reselection threshold and simultaneously adds the check timer makes some signal strengths are good but the signal Poor quality, Or the cell with good signal quality but poor signal strength will not enter the candidate range of the reselected cell, effectively avoiding the occurrence of the ping-pong effect.
  • the program may be stored in a computer readable storage medium, and the storage medium may include: ROM, RAM, disk or CD, etc.

Landscapes

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

Abstract

La présente invention concerne un procédé permettant d'éviter l'effet ping-pong dans la resélection de cellule, ce procédé consistant à: sélectionner des cellules pouvant être des cellules de desserte candidates, selon un critère S, parmi des cellules de desserte courantes et des cellules de non-desserte adjacentes; déterminer une cellule optimale, selon un critère R, parmi des cellules de desserte candidates; si la cellule optimale n'est pas la cellule de desserte courante, on détermine si l'intensité et la qualité du signal de la cellule optimale sont égales ou supérieures à des seuils de resélection, les seuils de resélection étant supérieurs à des seuils de desserte minimum de la cellule de desserte; et dans le cas où l'intensité et la qualité du signal de la cellule optimale sont égales ou supérieures à des seuils de resélection, on déclenche la resélection de cellule. Les modes de réalisation de la présente invention concernent également un terminal correspondant. Suite au résultat obtenu dans cette invention, du fait de l'augmentation des seuils de resélection dans la resélection de cellule, les cellules ayant une bonne intensité de signal et une mauvaise qualité de signal ou les cellules ayant une mauvaise intensité de signal et une bonne qualité de signal ne seront pas incluses dans la plage des candidates des cellules de resélection, ce qui permet d'éviter efficacement l'apparition fréquente de l'effet ping-pong dans la resélection de cellule.
PCT/CN2011/072910 2011-04-18 2011-04-18 Terminal et procédé pour éviter l'effet ping-pong dans la resélection de cellule WO2011103823A2 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201180000270.7A CN102204344B (zh) 2011-04-18 2011-04-18 一种避免小区乒乓重选的方法和终端
PCT/CN2011/072910 WO2011103823A2 (fr) 2011-04-18 2011-04-18 Terminal et procédé pour éviter l'effet ping-pong dans la resélection de cellule

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2011/072910 WO2011103823A2 (fr) 2011-04-18 2011-04-18 Terminal et procédé pour éviter l'effet ping-pong dans la resélection de cellule

Publications (2)

Publication Number Publication Date
WO2011103823A2 true WO2011103823A2 (fr) 2011-09-01
WO2011103823A3 WO2011103823A3 (fr) 2012-04-19

Family

ID=44507269

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2011/072910 WO2011103823A2 (fr) 2011-04-18 2011-04-18 Terminal et procédé pour éviter l'effet ping-pong dans la resélection de cellule

Country Status (2)

Country Link
CN (1) CN102204344B (fr)
WO (1) WO2011103823A2 (fr)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102685851B (zh) * 2011-12-06 2018-08-24 南京中兴新软件有限责任公司 一种小区重选方法及装置
CN102595523A (zh) * 2012-01-31 2012-07-18 中兴通讯股份有限公司 小区列表的处理方法及装置、移动终端
CN104427563A (zh) * 2013-08-26 2015-03-18 鸿富锦精密工业(武汉)有限公司 基站信号锁定方法及系统
CN110351797B (zh) * 2013-10-30 2021-11-12 荣耀终端有限公司 一种终端驻留小区的方法、装置及移动终端
US9655022B2 (en) 2014-10-30 2017-05-16 Acer Incorporated Method of cell reselection
TWI566612B (zh) * 2014-10-30 2017-01-11 宏碁股份有限公司 細胞重新選擇方法
CN106470454B (zh) * 2015-08-19 2019-11-08 普天信息技术有限公司 故障弱化工作模式下的小区重选方法及终端
CN107396404B (zh) * 2016-05-16 2022-01-14 华为技术有限公司 一种小区重选方法及终端
CN107548109B (zh) * 2016-06-28 2020-04-10 大唐移动通信设备有限公司 一种小区切换方法和装置
CN106507418B (zh) * 2016-10-31 2020-10-30 姜莹莹 一种基于信号强度的小区重选方法、装置及移动终端
CN108076489A (zh) * 2016-11-16 2018-05-25 中国移动通信集团广西有限公司 一种小区选择的方法及装置
CN106658618A (zh) * 2017-03-10 2017-05-10 北京北方烽火科技有限公司 一种切换服务小区的方法及装置
CN109286955A (zh) * 2017-07-21 2019-01-29 深圳市中兴微电子技术有限公司 一种小区重选的方法和终端
CN109600791B (zh) * 2019-01-04 2021-03-12 Oppo广东移动通信有限公司 信号强度上报方法、装置、存储介质及移动终端
CN110139328B (zh) * 2019-05-22 2021-11-19 努比亚技术有限公司 一种移动终端的小区调整方法、移动终端及存储介质
CN110545564A (zh) * 2019-09-06 2019-12-06 广东小天才科技有限公司 一种通信连接方法、系统、终端设备及存储介质
CN112566206B (zh) * 2020-12-02 2023-02-28 Oppo（重庆）智能科技有限公司 小区变更的控制方法、装置、终端设备及存储介质

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1404339A (zh) * 2001-08-16 2003-03-19 Lg电子株式会社 移动终端的小区选择方法
CN101129002A (zh) * 2005-03-10 2008-02-20 三星电子株式会社 防止移动通信系统中的乒乓效应的小区重选方法和设备
CN101742580A (zh) * 2008-11-11 2010-06-16 华为技术有限公司 小区重选方法及装置

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101848527A (zh) * 2009-03-25 2010-09-29 中兴通讯股份有限公司 Csg小区选择/重选方法和装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1404339A (zh) * 2001-08-16 2003-03-19 Lg电子株式会社 移动终端的小区选择方法
CN101129002A (zh) * 2005-03-10 2008-02-20 三星电子株式会社 防止移动通信系统中的乒乓效应的小区重选方法和设备
CN101742580A (zh) * 2008-11-11 2010-06-16 华为技术有限公司 小区重选方法及装置

Also Published As

Publication number Publication date
CN102204344A (zh) 2011-09-28
WO2011103823A3 (fr) 2012-04-19
CN102204344B (zh) 2014-03-12

Similar Documents

Publication Publication Date Title
WO2011103823A2 (fr) Terminal et procédé pour éviter l'effet ping-pong dans la resélection de cellule
JP6577556B2 (ja) 近接加入者グループセルを探索するための方法および装置
US10034217B2 (en) Method for inter-radio access technology cell reselection
US7480519B2 (en) Cell reselection method and apparatus for preventing ping-pong in a mobile communications system
US20140128074A1 (en) Cell loading-based cell transition
EP2745575A1 (fr) Mécanisme de resélection de cellules basé sur la force et la qualité du signal
WO2013135122A1 (fr) Procédé et dispositif pour mettre en œuvre une mesure de rapport et rapporter le résultat de la mesure
KR20140017883A (ko) 이동 통신 시스템에서 단말의 ｌｔｅ 주파수 간 또는 시스템 간 셀 재선택 방법 및 장치
TW201216741A (en) Idle mode hybrid mobility procedures in a heterogeneous network
TW201352023A (zh) 無線資源控制（ｒｒｃ）狀態改變時之高優先級搜尋之裝置及方法
WO2014153756A1 (fr) Mesure inter-fréquences évolutive pour la resélection de cellules
WO2017092639A1 (fr) Procédé, dispositif, et système de radiorecherche dans un scénario de déploiement dense de petites cellules
WO2009012678A1 (fr) Procédé, terminal utilisateur, dispositif côté réseau et système de communication sans fil pour nouvelle sélection, d'une macro-cellule à un réseau limité

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 201180000270.7

Country of ref document: CN

121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 11746865

Country of ref document: EP

Kind code of ref document: A2

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 11746865

Country of ref document: EP

Kind code of ref document: A2