WO2008112255A2 - Cell reselection process for wireless communications - Google Patents
Cell reselection process for wireless communications Download PDFInfo
- Publication number
- WO2008112255A2 WO2008112255A2 PCT/US2008/003286 US2008003286W WO2008112255A2 WO 2008112255 A2 WO2008112255 A2 WO 2008112255A2 US 2008003286 W US2008003286 W US 2008003286W WO 2008112255 A2 WO2008112255 A2 WO 2008112255A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cell
- wtru
- parameter
- reselection
- ranking
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 88
- 238000004891 communication Methods 0.000 title claims abstract description 12
- 238000004364 calculation method Methods 0.000 claims abstract description 10
- 238000005259 measurement Methods 0.000 claims description 88
- 229910000078 germane Inorganic materials 0.000 abstract 1
- 230000011664 signaling Effects 0.000 description 12
- 238000010586 diagram Methods 0.000 description 6
- 238000004422 calculation algorithm Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 241000700159 Rattus Species 0.000 description 3
- 239000000969 carrier Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000001413 cellular effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000008447 perception Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/24—Cell structures
- H04W16/32—Hierarchical cell structures
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/20—Selecting an access point
-
- 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
- H04W36/0055—Transmission or use of information for re-establishing the radio link
- H04W36/0058—Transmission of hand-off measurement information, e.g. measurement reports
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/04—Reselecting a cell layer in multi-layered cells
-
- 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
- H04W36/0007—Control or signalling for completing the hand-off for multicast or broadcast services, e.g. MBMS
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/24—Reselection being triggered by specific parameters
- H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
Definitions
- the present invention is related to wireless communication systems.
- the present invention is related to cell reselection in wireless devices.
- LTE Long Term Evolution
- UMTS Evolved Universal Mobile Telecommunications system
- E- UTRAN Evolved Universal Mobile Telecommunications system
- UMTS Universal Mobile Telecommunications System
- WTRU Wireless Transmit/Receive Unit
- the WTRU may perform cell reselection either in Idle mode or on the forward access channel (FACH) or the paging channel (PCH).
- FACH forward access channel
- PCH paging channel
- SIB3 system information block 3
- the signal receive level, S nlev is measured as:
- Equation (2) where received signal code power (RSCP) is measured by the WTRU and Qrxievmin the minimum required quality is measured based on RSCP, and UE_TXPWR_MAX_RACH , the maximum allowed uplink transmitter power, are system parameters transmitted in SIB3 as explained below. [0009] Along with Q qU aimin, Qrxievmin and UE_TXPWR_MAX_RACH, other parameters are transmitted in SIB3 and SIBIl for cell reselection, including, but not limited to the following parameters that are transmitted in SIB 3:
- SsearchRAT Measure inter- Radio Access Technology (RAT) neighbor cells when S qual ⁇ S searchRAT . Always measure inter-RAT neighbor cells when not specified.
- RAT Radio Access Technology
- Qhystis Used in ranking serving cell based on Reference Signal Code Power (RSCP).
- RSCP Reference Signal Code Power
- Qhyst2s Used in ranking serving cell based on Ec/Io.
- Qrxievmin Minimum required quality measure based on RSCP.
- Treseiection Time in which a neighbor cell preferably meets cell reselection criteria for WTRU to reselect.
- Cell Selection and Reselection Quality Measure Ec/Io or RSCP: specifies the measurement quantity on which a ranking should be based.
- SIB System Information Block
- Qoffsetis,n Quality Offset used to rank cell based on RSCP.
- UE_TXPWR_MAX_RACH Maximum allowed uplink (UL) transmitter (TX) Power for neighbor cell.
- Qrxievmin Minimum required quality measure based on RSCP.
- the WTRU is able to rank its serving and neighbor cells.
- the equation for ranking the serving cell is given as:
- Similar ranking equations are present when the measurement quantity is RSCP.
- the signalled value Qoffinbms is added to those cells (serving or neighboring) that belong to the multimedia broadcast/multicast service (MBMS) preferred frequency layer (PL).
- MBMS multimedia broadcast/multicast service
- PL preferred frequency layer
- the primary purpose of cell reselection, regardless of intra- frequency, inter-frequency, or inter-RAT, is to ensure that the UE camps on/connects to the best cell in terms of radio condition, e.g., path loss, received reference signal power, or received reference symbol Es/Io.
- radio condition e.g., path loss, received reference signal power, or received reference symbol Es/Io.
- traffic load balancing is essential because of the shared channel nature. That is, the user throughput decreases as the number of active UEs in the cell increases, and the loading directly impacts on the user perception.
- E-UTRAN bands/carriers may be extended in the future, UEs having different band capabilities may coexist within a network. It is also likely that roaming UEs have different band capabilities. Overlaying different RATs adds to this variety.
- HCS hierarchical cell structures
- E-UTRAN may be utilised in E-UTRAN to cover for example, indoors and hot spots efficiently. It is possible that E-UTRAN is initially deployed only at hot spots, in which case this driver becomes essential for inter-RAT, not just for inter-frequency. Another use case would be to deploy a large umbrella cell to cover a vast area without having to deploy a number of regular cells, while providing capacity by the regular cells on another frequency.
- Cells that are part of a sub-network should prioritise the camping on that sub-network.
- UEs that do not belong to private sub-networks should not attempt to camp or access them.
- This mobility driver aims to limit the inter-RAT mobility for certain
- An operator may have different policies in allocating frequencies to certain services. For example, the operator may concentrate Voice over Internet Protocol (VoIP) UEs to a certain frequency layer or RAT (e.g., UTRAN or GERAN), if evaluations prove this effective.
- VoIP Voice over Internet Protocol
- MBMS services may be provided only in certain frequency layers, it may be beneficial/necessary to control inter-frequency/RAT mobility depending on whether the UE receives a particular MBMS service or not
- the mobility solution should not consume excessive UE battery, e.g., due to measurements, measurement reporting, broadcast channel (BCH) reception, or terminal adapter (TA) update signalling.
- BCH broadcast channel
- TA terminal adapter
- the mobility solution should not cause excessive network signalling/processing load. This includes over-the-air signalling, S 1/X2 signalling, and processing load at network nodes. Unnecessary handovers and cell reselections should be avoided, and paging channel (PCH) and BCH signallings, as well as dedicated signallings, should be limited. This could be achieved by similar counte ⁇ neasures as for UE battery saving.
- PCH paging channel
- BCH dedicated signallings
- the mobility solution should not demand excessive efforts in operating/maintaining a network. For example, when a new e Node B (eNB) is added or an existing eNB fails, the mobility solution should not incur excessive efforts to set up or modify the parameters.
- eNB e Node B
- a method of signaling network and WTRU parameters between the WTRU and the network involve defining the cell reselection algorithm to incorporate important parameters relating to the cell reselection process. A process for prioritizing different parameters is also disclosed. A signaling scheme for the communication of the reasons for cell reselection from the WTRU to the network is also disclosed whereby the network is informed about the reasons for the reselection decision.
- Figure 1 is an illustration of equations used for cell reselection.
- Figure 2 is a block diagram depicting the use of a cell load parameter in cell relection.
- Figure 3 is a block diagram depicting the use of a bandwidth capability parameter in cell relection.
- Figure 4 is a block diagram depicting the use of a subscribed services parameter in cell relection.
- Figure 5 is a block diagram depicting the use of a blacklist in cell reselection.
- Figure 6 is a block diagram showing how MBMS cells may be included or excluded in cell reselection.
- Figure 7 is a block diagram depicting a method of assigning priorities to parameters used in cell reselection.
- wireless transmit/receive unit includes but is not limited to a user equipment (UE), a mobile station, a fixed or mobile subscriber unit, a pager, a cellular telephone, a personal digital assistant (PDA), a computer, or any other type of user device capable of operating in a wireless environment.
- base station includes but is not limited to a Node-B, a site controller, an access point (AP), or any other type of interfacing device capable of operating in a wireless environment.
- OAM Operations, Administration, and Maintenance
- WTRU measurement, and offset and hysterisis values transmitted by the network are incorporated in the cell reselection criteria.
- An offset for MBMS cells is also included.
- the MBMS criterion is modified to allow the WTRU and the network to make decisions as to camping on MBMS cells.
- Cell loading, and WTRU and network bandwidth capabilities, are also herein introduced as reselection parameters.
- a WTRU receives various pieces of information from the network System Information Blocks (SIB). Information received factors into the cell reselection decision process.
- SIB System Information Blocks
- FIG 1 an illustration 100 depicting ranking cells for reselection using certain parameters in a reselection algorithm is shown.
- a signal between a WTRU and a cell under consideration is measured with respect to the signal power and the signal quality. Signal power may be quantified for comparison with other cells' signals using a signal power measurement equation 101. Likewise, the signal quality may be quantified for comparison against other cells' quality measurement by using a quality measurement equation 103.
- Reference Signal Receive Power is used as a basis for signal power quality in the power measurement equation 101.
- Reference Signal Receive Quality is used as basis for signal quality as shown in the quality measurement equation 103.
- Other parameters 105a, 105b, 105c and 105d are shown. They include parameters representing cell load, bandwidth capability, subscribed services of the WTRU, and whether the cell is a MBMS cell. These parameters, which are discussed in greater detail below, are substituted into the power measurement equation 101 and/or the quality measurement equation 103 as determined by the WTRU during the ranking process for cell reselection.
- the parameter Q su bs 105c would be substituted into the power measurement equation 101 and the quality measurement equation 103.
- Adding the parameter 105a, 105b, 105c, 105d to the equations 101, 103 will increase the power or quality measurement, respectively.
- a higher quality or power measurement will make it more likely that the cell being considered will be selected for reselection.
- More than one parameter 105a, 105b, 105c, 105d may be substituted in the measurement equations 101, 103. They may be added or subtracted from the measurement values in any combination.
- the nature of the parameter 105a, 105b, 105c, 105d and how the WTRU views the parameter 105 in light of the reselection algorithm determines whether the parameter 105a, 105b, 105c, 105d weighs in favor of selecting the cell, in which case it is added, or weighs against camping on the cell, in which case the parameter 105a, 105b, 105c, 105d is subtracted.
- RSRP and RSRQ are shown here by way of example, any suitable measurement may be used.
- Various parameters 105a, 105b, 105c, 105d may be added or subtracted as indicated to perform a cell reselection ranking and still fall within the intended scope of this disclosure.
- a method 200 of using a cell parameter Qceiijoad is shown in Figure 2.
- the network creates a parameter Qceiijoad that may represent the traffic loading of the cell or the camp loading of the cell (block 201).
- Qceiijoad may be a single parameter that represents both the traffic and camp loading of the cell.
- the parameter Qceiijoad may represent the amount of resources left in a particular cell.
- the network transmits the parameter to a WTRU, signaling the parameter in a system information block (block 203).
- the parameter Qceiijoad has not been incorporated in Qquaimin and Qrxievmin because it is a parameter whose value may vary from cell to cell across different time periods.
- the cell loading parameter Qceiijoad may be incorporated in the parameters Qquaimin and Qrxievmin which would then vary across different cells across different time intervals.
- the network might not transmit Qceiijoad, whereby the WTRU's criteria for camping on that cell is comprised of the other factors being used in the reselection process.
- Qceiijoad would need to be re-transmitted or may be configured to re-transmit regularly and some predetermined time interval.
- the parameter Qceiijoad is added to the signal power and quality measurements for that cell (block 209).
- the ranking of the cell is increased with respect to other neighboring cells. If the cell under consideration is not a cell on which the WTRU would opt to camp due to the value of Qceiijoad, then the value of Qceiijoad is subtracted from the signal power and quality measurements ( block 207). By subtracting the value of Qceii_ioad,the cell will have lower signal power and quality measurements as compared with other neighboring cells, thereby making it less likely that the cell will be chosen for cell reselection by the WTRU. After the signal power and quality measurements for the servicing cell and the neighboring cells are calculated, the servicing and neighboring cells are ranked (block 211). If a neighboring cell has higher signal power and/or quality measurements than the current servicing cell, the WTRU will select the cell with the better signal and camp on the better cell (block 213) and the method ends until the next cell ranking.
- the quality measure for the cell may be written as:
- the signal power may be represented by:
- the parameter Qceiijoad may also be included along with the other parameters used in cell ranking as shown below.
- the ranking for the servicing cell may be kept the same:
- the equation for ranking may be modified as follows:
- Rank_n RSRQ n - Min(Q offset2 , Q ⁇ ) I Q ⁇ load ⁇ Q bw rap ⁇ Q 511115 ⁇ Q ofiMBMS .
- a method 300 of using a cell parameter Qbw_cap is shown in Figure 3.
- the bandwidth capabilities of the network are transmitted to the WTRU through a system information (block 301).
- the WTRU calculates a parameter Qbw_ca P based on the bandwidth capabilities signaled by the network (block 303).
- the parameter Qbw_ca P is added to the signal power and quality measurements for that cell (block 309). By adding the value of Qbw_cap to the signal power and quality measurements, the ranking of the cell is increased with respect to other neighboring cells.
- the value of Qbw_cap is subtracted from the signal power and quality measurements (block 307).
- the cell will have lower signal power and quality measurements when they are compared with neighboring cells, thereby making it less likely that the cell will be chosen for cell reselection by the WTRU.
- the servicing and neighboring cells are ranked (block 311). If a neighboring cells has higher signal power and/or quality measurements than the current servicing cell, the WTRU will select the cell with the better signal and camp on the better cell (block 313) and the method 300 ends until the next cell ranking.
- the WTRU may have signaled its bandwidth capabilities to the network at the initial cell selection, or through a Radio Resource Control (RRC) message after entering the connected state.
- RRC Radio Resource Control
- the parameter Qbw_ca P may be transmitted by the network and directly added or substracted from the cell ranking equations.
- the network may use that information along with its knowledge of cell resources available and send a single parameter Pceii_access combining the two parameters, Qceiijoad and Qbw_ca P .
- a method 400 of using a cell parameter Q su bs is shown in Figure 4.
- the network transmits, in the system information block, the services supported by the cell as indicated in block 401.
- the WTRU then calculates a parameter Q su bs based on the services being supported by a cell under consideration (block 403).
- the parameter Qsubs is added to the signal power and quality measurements for that cell (block 409). By adding the value of Qsbus to the signal power and quality measurements, the ranking of the cell is increased with respect to other neighboring cells.
- the value of Q su bs is subtracted from the signal power and quality measurements as shown in block 407.
- the cell will have lower signal power and quality measurements as compared with other neighboring cells, thereby making it less likely that the cell will be chosen for cell reselection by the WTRU.
- the servicing and neighboring cells are ranked (block 411). If a neighboring cells has higher signal power and/or quality measurements than the current servicing cell, the WTRU will select the cell with the better signal and camp on the better cell (block 413) and the method 400 ends until the next cell ranking.
- the WTRU may decide not to camp on that cell based on its lack of support for the service. In such a case, a very large value of Qsubs may be subtracted from the signal power and quality measurements of the cell to reduce the cell's ranking and preclude its selection by the WTRU.
- the network may use that information in combination with its knowledge of cell resources available and may send a blacklist of cells on which the WTRU should not be allowed to camp based on the information. The ranking of neighboring cells in such a case is calculated by:
- the network based on the information provided by the WTRU relating to its bandwidth capabilities and its knowledge of cell resources available, transmits a blacklist of cells on which the WTRU should not be allowed to camp, along with a barring timer indicating the time period that each cell in the blacklist should be barred from camping.
- the blacklist and barring timers are received by the WTRU (block 503).
- the WTRU looks to see if the cell under consideration is included in the blacklist (block 505). If the cell is included in the blacklist, the WTRU then looks to see if the barring timer associated with that cell has expired (block 507). If the barring timer has not expired, then the cell is excluded from the cell rankings (block 511).
- the cell is included in the cell ranking (block 509). In either case, the cell ranking is used, whether it includes a given cell or not, and a decision to reselect a cell on which to camp is made (block 513) where the method 500 ends.
- the parameter QOHMBMS may be added or subtracted for Multimedia Broadcast / Multicast Service (MBMS) cells depending on whether the network wants to give priority to those cells. This decision may be made by the network based on the type of service to which the WTRU has subscribed. It may be decided that the network does not want to allow the WTRU camp on MBMS cells. In such a case the cell reselection algorithm may be altered as shown in Figure 6. [0085] Figure 6 depicts a method 600 by which the network optionally signals to a WTRU whether the WTRU is permitted to camp on MBMS cells. A WTRU periodically searches for a new cell with a better signal than the cell by which the WTRU is currently being serviced (block 601).
- MBMS Multimedia Broadcast / Multicast Service
- the network then transmits an indicator to the WTRU in the system information block which informs the WTRU whether it can camp on MBMS cells (block 603). If the WTRU is permitted to camp on MBMS cells,(block 605), it is determined if the cell is favored for some factor making the cell desirable to the WTRU (block 607). If the cell is seen favorably, the value of QoffMBMS is added to the cell signal power and quality measurements (block 611). If the cell is not seen favorably, the value of the parameter QOHMBMS is subtracted from the signal power and quality measurements (block 613).
- the WTRU excludes a cell that the network indicates is a MBMS cell from the cell ranking and MBMS cells are not considered in the cell ranking process.
- Rankings of cell based on signal power and quality measurements are made for all neighboring cells on which the WTRU is permitted to camp (block 615) and if a cell is found to have higher measurements than the cell currently servicing the WTRU, then a cell reselection is made (block 617) and the method 600 ends.
- the network may also want to give more priority to some parameters like WTRU measurements over other parameters like bandwidth capabilities or cell loading.
- the network may signal the absolute of relative priority indications between the different parameters and the WTRU may make use of the priority information to adjust its cell reselection criteria according to certain predefined rules.
- the network may signal an optional scaling parameter along with the parameter signaled to the WTRU, applying the scaling parameter to the equation.
- there may be different scaling factors (weights) to each of the ranking parameters and the equations for ranking become:
- Rank_s RSRQ 5 + Q hyst2 ⁇ Q ofIMBMS Equation (11) for servicing cells, and:
- Equation (12) ⁇ d * Q subs ⁇ e * Q oflMBMS for neighboring cells
- a, b, c, d, and e are scaling factors for a respective parameter
- Q o ffset2 is an offset value based on RSCP
- Qhyst is a factor used in ranking based on the hysteresis of the cell
- QoffMBMS is a ranking factor offset based on whether the cell is a MBMS cell.
- Rank_n RSRQ n - £/*; * Q p3121n Equation (13) where index i may go from 0 to a value M depending on the number of parameters present in the equation and where a represents a scaling factor that may go from 0 to a value N.
- Q pa ram represents the different parameters for cell reselection as those mentioned above.
- a method of applying scaling factors to the parameters in the cell reselection process 700 is shown in Figure 7 where the network establishes priorities for one or more parameters being used in the cell reselection procedure (block 701). The network then transmits the priority indicia, or alternatively, a scaling factor to be applied against some or all of the parameters in the reselection equations to the WTRU (block 703). The WTRU applies the priority indicia or scaling factors to the parameters in the cell reselection process (block 705). The equations are then evaluated to compute the signal power and quality measurements for each neighboring cell and the servicing cell and a ranking is performed based on the results of the signal power and quality measurements (block 707).
- a network may also be given the option of not signaling some of the parameters for ranking or threshold detection depending on the scenario and services running on the WTRU. In this case the WTRU may use whatever parameters it derives or are received from the network to perform the ranking calculations.
- the network may use that information in load balancing and as input to the values of parameters to be transmitted by the network for the cell reselection process.
- a neighbor cell may indicate to the WTRU whether or not it wants to allow the WTRU to camp on the cell at that time. If the neighbor cell did not want to allow the WTRU to camp on it, the WTRU may then camp on the next cell in its ranking list. If the neighbor cell allowed the WTRU to camp on it, then the WTRU may reselect that cell for camping.
- ROM read only memory
- RAM random access memory
- register cache memory
- semiconductor memory devices magnetic media such as internal hard disks and removable disks, magneto-optical media, and optical media such as CD-ROM disks, and digital versatile disks (DVDs)
- Suitable processors include, by way of example, a general purpose processor, a special purpose processor, a conventional processor, a digital signal processor (DSP), a plurality of microprocessors, one or more microprocessors in association with a DSP core, a controller, a microcontroller, Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs) circuits, any other type of integrated circuit (IC), and/or state machine.
- a processor in association with software may be used to implement a radio frequency transceiver for use in a wireless transmit receive unit (WTRU), user equipment (UE), terminal, base station, radio network controller (RNC), or any host computer.
- WTRU wireless transmit receive unit
- UE user equipment
- RNC radio network controller
- the WTRU may be used in conjunction with modules, implemented in hardware and/or software, such as a camera, a video camera module, a videophone, a speakerphone, a vibration device, a speaker, a microphone, a television transceiver, a hands-free headset, a keyboard, a Bluetooth® module, a frequency modulated (FM) radio unit, a liquid crystal display (LCD) unit, an organic light-emitting diode (OLED) display unit, a digital music player, a media player, a video game player module, an Internet browser, and/or any wireless local area network (WLAN) module.
- modules implemented in hardware and/or software, such as a camera, a video camera module, a videophone, a speakerphone, a vibration device, a speaker, a microphone, a television transceiver, a hands-free headset, a keyboard, a Bluetooth® module, a frequency modulated (FM) radio unit, a liquid crystal display (LCD) unit, an organic light-emit
- a method of reselecting a cell in a wireless communication system comprising creating at least one parameter relating to a cell reselection decision.
- invention 1 further comprising transmitting the at least one parameter to a wireless transmit/receive unit (WTRU).
- WTRU wireless transmit/receive unit
- the method characterized any of the preceding embodiments further comprising ranking a servicing cell and at least one neighboring cell based on the cell ranking measurement.
- the method characterized any of the preceding embodiments further comprising making a cell reselection decision based on cell rankings.
- SIB system information block
- the method characterized any of the preceding embodiments further comprising transmitting in a system information message an inability of a cell to support services to which a WTRU is subscribed.
- the method characterized any of the preceding embodiments further comprising receiving the system information message during a system information reading stage.
- the method characterized any of the preceding embodiments further comprising excluding the unsuitable cell from cell reselection and selecting a next highest ranked cell for reselection.
- a method of reselecting a cell in a wireless communications system comprising determining if a cell should allow a WTRU to camp on it.
- a method of ranking cells for cell reselection in a wireless communications system comprising identifying a plurality of parameters representing factors in the cell reselection decision.
- a method of cell reselection in a wireless communications system comprising transmitting a plurality of parameters representing factors in the cell reselection process. 35. The method characterized by embodiment 34 further comprising receiving the plurality of parameters and substituting them in an equation to calculate a cell measurement.
- each of the plurality of parameters is assigned a priority and the priority is applied to an associated parameter when calculating a cell measurement.
- a wireless transmit/receive unit comprising a receiver configured to receive at least one parameter representing factors in a cell reselection decision.
- the WTRU characterized by embodiment 42 further comprising a cell ranking processor configured to substitute the at least one parameter into an equation for calculating a cell ranking measurement, wherein a parameter is added to make it more likely the WTRU will camp on a cell associated with the parameter and subtracting a parameter to make it less likely the WTRU will camp on a cell associated with the parameter and ranking a servicing cell and at least one neighboring cell based on the cell ranking measurement.
- a cell ranking processor configured to substitute the at least one parameter into an equation for calculating a cell ranking measurement, wherein a parameter is added to make it more likely the WTRU will camp on a cell associated with the parameter and subtracting a parameter to make it less likely the WTRU will camp on a cell associated with the parameter and ranking a servicing cell and at least one neighboring cell based on the cell ranking measurement.
- the WTRU characterized by any of embodiments 42-43 further comprising a cell reselection processor configured to make a cell reselection decision based on cell rankings and camp on a selected cell.
- the WTRU characterized by any of embodiments 42-44 wherein one of the parameters is selected from the group of cell load, bandwidth capabilities, and subscribed services.
- the WTRU characterized by any of embodiments 44-45 wherein the equation calculates a cell measurement based on cell signal quality.
- the WTRU characterized by any of embodiments 44-46 wherein the equation calculates a cell measurement based on cell signal power level.
- the WTRU characterized by any of embodiments 44-47 wherein one of the at least one parameters is a parameter, Qceii_access, created using information based on cell load and bandwidth capabilities of a cell.
- the WTRU characterized by any of embodiments 44-48 wherein the receiver is further configured to receive in a system information message an inability of a cell to support services to which a WTRU is subscribed and excluding the unsuitable cell from cell reselection and selecting a next highest ranked cell for reselection.
- a wireless transmit/receive unit comprising a receiver configure to receive a blacklist containing cell on which the WTRU is not allowed to camp.
- the WTRU characterized by embodiment 50 further comprising a cell ranking processor configured to exclude a cell contained in the blacklist from cell ranking calculations.
- the WTRU characterized by any of embodiments 50-51 further comprising a cell reselection processor configured select a cell based on a cell ranking, wherein the cell ranking excludes cells contained in the blacklist.
- a wireless receive/transmit unit comprising a receiver configured to receive at least one parameter representing a factor in a cell reselection decision.
- the WTRU characterized by embodiment 55 further comprising a cell ranking processor configured to substitute the at least one parameter into an equation, wherein the equation calculates a measurement associated with a cell and wherein the at least one parameter is added to the equation to make it more likely that the WTRU will select a cell under consideration for reselection and the at least one parameter is subtracted from the equation to make it less likely that the WTRU will select a cell under consideration for reselection.
- the WTRU characterized by any of embodiments 56-57 wherein the equation calculates a cell measurement based on cell signal quality.
- the WTRU characterized by any of embodiments 56-58 wherein the equation calculates a cell measurement based on cell signal power level.
- the WTRU characterized by any of embodiments 56-59 wherein a parameter Qcei L a ⁇ ess is created using information based on cell load and bandwidth capabilities of a cell.
- the WTRU characterized by any of embodiments 56-60 wherein the receiver is further configure to receive in a system information message an inability of a cell to support services to which a WTRU is subscribed and excluding the unable cell from cell reselection and selecting a next highest ranked cell for reselection.
- a wireless transmit/receive unit comprising: a cell reselection processor configured to reselect a cell on which the WTRU is camped based on a plurality of factors; a transmitter configured to transmit at least one factor that was used to make a cell reselection decision.
- a base station comprising a transmitter configured to signal at least one parameter representing a factor in a cell reselection decision, wherein the at least one parameter is signaled in a system information block (SIB).
- SIB system information block
- the base station characterized by embodiment 63 further comprising a blacklist processor configured to create a blacklist of cells on which a wireless transmit/receive unit (WTRU) should not camp.
- WTRU wireless transmit/receive unit
- the base station characterized by embodiment 64, wherein the blacklist processor is further configured to create a barring timer for each cell contained in the blacklist.
- the base station characterized by embodiment 65, wherein the transmitter is further configured to transmit at least one of the blacklist and the barring timers along with the at least one parameter.
- the base station characterized by any of embodiments 63-66 further comprising a priority processor configured to assign a priority indicator for each of the at least one parameters.
- the base station characterized by any of the embodiments 63-67 further comprising and wherein the transmitter is further configured to transmit each priority indicator along with the at least one parameter.
- a base station comprising a transmitter configured to broadcast in a system information message that a cell is unable to support services to which a wireless transmit/receive unit (WTRU) is subscribed indicating the WTRU should not camp on the cell.
- WTRU wireless transmit/receive unit
- a base station comprising a receiver configured to receive messages containing factors used by a wireless transmit/receive unit (WTRU) in making a cell reselection.
- WTRU wireless transmit/receive unit
- the base station characterized by any of embodiments 70-71, wherein the messages are used to manage load balancing.
Abstract
Description
Claims
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2008226789A AU2008226789B2 (en) | 2007-03-13 | 2008-03-13 | Cell reselection process for wireless communications |
MX2009009802A MX2009009802A (en) | 2007-03-13 | 2008-03-13 | Cell reselection process for wireless communications. |
BRPI0808232-4A BRPI0808232A2 (en) | 2007-03-13 | 2008-03-13 | CELL SELECTION PROCESS FOR WIRELESS COMMUNICATIONS. |
JP2009553615A JP2010521876A (en) | 2007-03-13 | 2008-03-13 | Cell reselection process for wireless communication |
CA002681004A CA2681004A1 (en) | 2007-03-13 | 2008-03-13 | Cell reselection process for wireless communications |
EP08726759A EP2137996A2 (en) | 2007-03-13 | 2008-03-13 | Cell reselection process for wireless communications |
IL200890A IL200890A0 (en) | 2007-03-13 | 2009-09-13 | Cell reselection process for wireless communications |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US89458807P | 2007-03-13 | 2007-03-13 | |
US60/894,588 | 2007-03-13 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2008112255A2 true WO2008112255A2 (en) | 2008-09-18 |
WO2008112255A3 WO2008112255A3 (en) | 2009-02-05 |
Family
ID=39636850
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2008/003286 WO2008112255A2 (en) | 2007-03-13 | 2008-03-13 | Cell reselection process for wireless communications |
Country Status (14)
Country | Link |
---|---|
US (2) | US20080227453A1 (en) |
EP (1) | EP2137996A2 (en) |
JP (2) | JP2010521876A (en) |
KR (2) | KR20100016463A (en) |
CN (1) | CN101637048A (en) |
AR (1) | AR065711A1 (en) |
AU (1) | AU2008226789B2 (en) |
BR (1) | BRPI0808232A2 (en) |
CA (1) | CA2681004A1 (en) |
IL (1) | IL200890A0 (en) |
MX (1) | MX2009009802A (en) |
RU (1) | RU2009137762A (en) |
TW (1) | TW200841756A (en) |
WO (1) | WO2008112255A2 (en) |
Cited By (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2010127835A1 (en) * | 2009-05-04 | 2010-11-11 | Research In Motion Limited | Methods and apparatus to process signal strengths of not allowed cells during cell reselection |
WO2011092126A1 (en) | 2010-01-28 | 2011-08-04 | St-Ericsson Sa | Cell selection and reselection in a telecommunication network |
JP2012509029A (en) * | 2008-11-14 | 2012-04-12 | クゥアルコム・インコーポレイテッド | GPS-assisted cell selection for mobile devices |
EP2458921A1 (en) * | 2010-11-30 | 2012-05-30 | Research In Motion Limited | Cell re-selection in a cellular telecommunications network |
WO2012072716A1 (en) | 2010-11-30 | 2012-06-07 | Research In Motion Limited | Cell re-selection using a ranking algorithm |
WO2012072147A1 (en) * | 2010-12-03 | 2012-06-07 | Nokia Siemens Networks Oy | Enhanced mobility control in heterogeneous networks |
WO2012112185A1 (en) * | 2011-02-16 | 2012-08-23 | Research In Motion Limited | Procedure for formulating a signal to interference plus noise ratio |
WO2012134182A2 (en) | 2011-03-31 | 2012-10-04 | Lg Electronics Inc. | Method of providing service to user equipment in wireless communication system and apparatus thereof |
US8320921B2 (en) | 2010-02-12 | 2012-11-27 | Nokia Corporation | Method and apparatus for cell selection in flexible spectrum use radio system |
GB2498395A (en) * | 2012-01-16 | 2013-07-17 | Renesas Mobile Corp | Modifying cell reselection parameters in response to observing a device-to-device discovery signal |
WO2013106654A1 (en) * | 2012-01-12 | 2013-07-18 | Qualcomm Incorporated | Cell reselection based on multimedia broadcast multicast service (mbms) metrics |
EP2621222A1 (en) * | 2012-01-24 | 2013-07-31 | Research In Motion Limited | Performing idle mode mobility measurements in a mobile communication network |
US8942205B2 (en) | 2012-01-24 | 2015-01-27 | Blackberry Limited | Performing idle mode mobility measurements in a mobile communication network |
EP3018944A1 (en) * | 2014-11-04 | 2016-05-11 | Acer Incorporated | Method of handling cell reselection |
EP3035741A1 (en) * | 2014-12-17 | 2016-06-22 | Thomson Licensing | WLAN user quality of experience control in a multi-access point environment |
WO2016107887A1 (en) * | 2014-12-30 | 2016-07-07 | British Telecommunications Public Limited Company | Cell reselection |
CN107070615A (en) * | 2010-02-10 | 2017-08-18 | 金峰创新公司 | The apparatus and method of uplink synchronisation are set up in a wireless communication system |
WO2019194526A1 (en) * | 2018-04-04 | 2019-10-10 | Samsung Electronics Co., Ltd. | Method and apparatus for performing cell reselection in wireless communication system |
EP3952445A4 (en) * | 2019-04-26 | 2022-05-18 | Huawei Technologies Co., Ltd. | Cell selection method, cell reselection method and chip |
Families Citing this family (108)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8131295B2 (en) | 2006-06-20 | 2012-03-06 | Interdigital Technology Corporation | Methods and system for performing handover in a wireless communication system |
DK2519052T3 (en) * | 2007-04-23 | 2017-03-20 | Interdigital Tech Corp | Transfer failure handling. |
WO2008137376A2 (en) * | 2007-04-30 | 2008-11-13 | Interdigital Technology Corporation | Mobility procedures and differentiated charging in home node-bs |
RU2427979C1 (en) | 2007-04-30 | 2011-08-27 | Интердиджитал Текнолоджи Корпорейшн | Repeated selection of cell and transfer of service by means of multimedia broadcasting/multicasting service |
KR101482255B1 (en) * | 2007-06-18 | 2015-01-13 | 삼성전자주식회사 | A method and an apparatus for measuring on neighboring cells in mobile telecommunication system |
CN103167584B (en) | 2007-08-03 | 2016-01-20 | 交互数字专利控股公司 | The method of the process information realized by wireless transmitter/receiver unit (WTRU) and WTRU |
US8270991B2 (en) * | 2007-09-07 | 2012-09-18 | Research In Motion Limited | Network and cell selection and reselection for long-term evolution inter-radio access network based on long-term evolution mobility driver grouping |
FI20075686A0 (en) * | 2007-09-28 | 2007-09-28 | Nokia Corp | Configuration method and device |
WO2009111233A1 (en) | 2008-03-04 | 2009-09-11 | Interdigital Patent Holdings, Inc. | Method and apparatus for accessing a random access channel by selectively using dedicated or contention-based preambles during handover |
US8712415B2 (en) * | 2008-03-20 | 2014-04-29 | Interdigital Patent Holdings, Inc. | Timing and cell specific system information handling for handover in evolved UTRA |
TWI482511B (en) * | 2008-03-24 | 2015-04-21 | Interdigital Patent Holdings | Cell selection and reselection for closed subscriber group cells |
EP2291035A1 (en) * | 2008-04-28 | 2011-03-02 | Sharp Kabushiki Kaisha | Mobile communication system, mobile station device, base station device, and mobile communication method |
EP2117276B1 (en) * | 2008-05-10 | 2010-09-22 | Research In Motion Limited | Apparatus and method for cell reselection in a radio access network |
GB2460819A (en) * | 2008-05-28 | 2009-12-16 | Vodafone Plc | Controlling reselection from access points in a telecommunications network |
KR101565723B1 (en) | 2008-06-30 | 2015-11-03 | 인터디지탈 패튼 홀딩스, 인크 | Method and apparatus for performing a handover in an evolved universal terrestrial radio access network |
US8285285B2 (en) * | 2008-08-08 | 2012-10-09 | Qualcomm Incorporated | Intra-frequency cell reselection restriction in wireless communications |
US8121093B2 (en) * | 2008-09-22 | 2012-02-21 | Via Telecom, Inc. | Apparatus and method for alleviating barred access in mobile communication system |
FR2940001A1 (en) | 2008-12-12 | 2010-06-18 | St Nxp Wireless France | METHOD AND DEVICE FOR ASSIGNING A CELL TO A WIRELESS COMMUNICATION APPARATUS, AND CORRESPONDING APPARATUS |
EP3171634B1 (en) * | 2008-12-26 | 2019-01-23 | Sharp Kabushiki Kaisha | Evaluation of measurement events in a system using carrier aggregation |
WO2010078678A1 (en) * | 2008-12-29 | 2010-07-15 | 中兴通讯股份有限公司 | Method, system and drnc for transmitting cell ability across iur interface |
US8903413B2 (en) * | 2009-03-20 | 2014-12-02 | Qualcomm Incorporated | Hybrid cell management in wireless networks |
US20100291941A1 (en) * | 2009-05-15 | 2010-11-18 | Te-Ming Chen | Method for improving cell load balance in cellular network and associated user equipment |
US20120069814A1 (en) * | 2009-05-27 | 2012-03-22 | Satoshi Konishi | Frequency Allocation Device and Program Therefor |
US9094937B2 (en) * | 2009-08-26 | 2015-07-28 | Telefonaktiebolaget L M Ericsson (Publ) | Serving cell reselection methods and apparatus |
US9042889B2 (en) | 2009-09-22 | 2015-05-26 | Qualcomm Incorporated | Method and apparatus for selecting wireless communication systems |
US10448292B2 (en) * | 2009-10-22 | 2019-10-15 | Qualcomm Incorporated | Determining handover parameter for transmission by access point |
US8331929B2 (en) | 2009-11-24 | 2012-12-11 | At&T Mobility Ii Llc | Mobility-based reselection scan scheduling |
KR101313105B1 (en) * | 2009-12-16 | 2013-09-30 | 한국전자통신연구원 | mobile communication system and cell reselection method thereof |
US9265083B2 (en) * | 2009-12-29 | 2016-02-16 | Qualcomm Incorporated | System and method for radio link recovery |
US8559950B2 (en) | 2010-02-01 | 2013-10-15 | Intel Mobile Communications GmbH | Radio base stations, radio communication devices, methods for controlling a radio base station, and methods for controlling a radio communication device |
US20110189989A1 (en) * | 2010-02-04 | 2011-08-04 | Nokia Corporation | Method and Apparatus for Cross Mode Mobility Optimization |
US9253798B2 (en) | 2010-02-12 | 2016-02-02 | Interdigital Patent Holdings, Inc. | Method and apparatus for optimizing uplink random access channel transmission |
JP2013520100A (en) * | 2010-02-12 | 2013-05-30 | インターデイジタル パテント ホールディングス インコーポレイテッド | Access control and congestion control in machine-to-machine communication |
US8838106B2 (en) * | 2010-02-23 | 2014-09-16 | Apple Inc. | Method and apparatus for cell reselection |
EP2567564B1 (en) * | 2010-05-06 | 2014-03-12 | Koninklijke KPN N.V. | Method, computer program and telecommunications infrastructure for activating an inactive cell |
US20130223235A1 (en) * | 2010-07-14 | 2013-08-29 | Research In Motion Limited | Idle Mode Hybrid Mobility Procedure in a Heterogeneous Network |
US20120057539A1 (en) * | 2010-09-07 | 2012-03-08 | Richard Lee-Chee Kuo | Method and apparatus for hybrid automatic repeat request in a wireless communication system |
US8385917B2 (en) | 2010-11-15 | 2013-02-26 | At&T Mobility Ii Llc | Radio selection employing transit data determined from kinetic energy generation |
KR20130122758A (en) | 2010-11-24 | 2013-11-08 | 엘타 시스템즈 리미티드 | Handover initiation methods and systems for improvement of cellular network performance |
JP2012142851A (en) * | 2011-01-05 | 2012-07-26 | Nec Casio Mobile Communications Ltd | Wireless communication device and method of measuring same frequency cell in standby |
WO2012096490A2 (en) * | 2011-01-10 | 2012-07-19 | 엘지전자 주식회사 | Method for restricting the cell access of a terminal in a wireless communication system, and apparatus therefor |
US8849215B2 (en) | 2011-03-30 | 2014-09-30 | Amazon Technologies, Inc. | Reducing rate of detection cycles and measurement cycles in a discontinuous reception (DRX) mode |
GB2492062B (en) * | 2011-06-15 | 2015-10-14 | Sca Ipla Holdings Inc | Apparatus and methods for controlling carrier selection in a wireless telecommunications system |
CN102857981B (en) * | 2011-06-29 | 2017-09-29 | 中兴通讯股份有限公司 | A kind of method and device for realizing cell reselection |
US20130028081A1 (en) * | 2011-07-27 | 2013-01-31 | Ming Yang | Method and apparatus for balancing load and reducing call blocking in a td-scdma system |
US8504029B2 (en) * | 2011-07-28 | 2013-08-06 | Telefonaktiebolaget L M Ericsson (Publ) | Mobile communication system cell selection in the presence of unacceptable cells |
FI20115799A0 (en) | 2011-08-15 | 2011-08-15 | Teliasonera Ab | Cell reselection mechanism |
US9209950B2 (en) * | 2011-10-03 | 2015-12-08 | Qualcomm Incorporated | Antenna time offset in multiple-input-multiple-output and coordinated multipoint transmissions |
WO2013051866A1 (en) * | 2011-10-04 | 2013-04-11 | Samsung Electronics Co., Ltd. | Method and system for performing measurements during idle mode in a heterogeneous network environment |
KR101981974B1 (en) * | 2011-10-04 | 2019-05-24 | 삼성전자주식회사 | A method and a system for managing cell selection in a wireless network system |
US8744439B2 (en) * | 2011-10-07 | 2014-06-03 | Apple Inc. | Methods and apparatus for intelligent initiation of connections within a network |
US9516531B2 (en) | 2011-11-07 | 2016-12-06 | Qualcomm Incorporated | Assistance information for flexible bandwidth carrier mobility methods, systems, and devices |
US20130114571A1 (en) | 2011-11-07 | 2013-05-09 | Qualcomm Incorporated | Coordinated forward link blanking and power boosting for flexible bandwidth systems |
US20130114433A1 (en) | 2011-11-07 | 2013-05-09 | Qualcomm Incorporated | Scaling for fractional systems in wireless communication |
US9848339B2 (en) | 2011-11-07 | 2017-12-19 | Qualcomm Incorporated | Voice service solutions for flexible bandwidth systems |
EP2769591B1 (en) * | 2011-11-09 | 2016-10-05 | Telefonaktiebolaget LM Ericsson (publ) | Almost-blank subframe configuration detection in heterogeneous networks |
US9042888B2 (en) * | 2011-12-05 | 2015-05-26 | Apple Inc. | Mobile device network signaling management |
CN102685838A (en) | 2012-05-25 | 2012-09-19 | 华为终端有限公司 | Cell reselection method and mobile terminal |
US20130337814A1 (en) * | 2012-06-13 | 2013-12-19 | Nokia Siemens Networks Oy | Load balancing in a network and between networks |
CN103582049B (en) * | 2012-07-18 | 2018-10-23 | 南京中兴新软件有限责任公司 | A kind of method and apparatus for realizing frequency point priority information inheritance |
KR20140017883A (en) * | 2012-08-01 | 2014-02-12 | 삼성전자주식회사 | Method and apparatus for cell reselection of user equipment between lte inter frequency or inter radio access technology in a mobile communication system |
GB2506888B (en) | 2012-10-10 | 2015-03-11 | Broadcom Corp | Reselection |
US20140106749A1 (en) * | 2012-10-12 | 2014-04-17 | Nokia Siemens Networks Oy | Method, apparatus, computer program product, computer readable medium and system for cell reselection |
KR20150088241A (en) | 2012-11-03 | 2015-07-31 | 엘지전자 주식회사 | Interested service-based cell reselection method in wireless communication system, and apparatus for supporting same |
US9374773B2 (en) | 2012-12-06 | 2016-06-21 | At&T Intellectual Property I, L.P. | Traffic steering across cell-types |
US10129822B2 (en) | 2012-12-06 | 2018-11-13 | At&T Intellectual Property I, L.P. | Device-based idle mode load balancing |
US9544842B2 (en) | 2012-12-06 | 2017-01-10 | At&T Intellectual Property I, L.P. | Network-based intelligent radio access control |
US9549343B2 (en) | 2012-12-06 | 2017-01-17 | At&T Intellectual Property I, L.P. | Traffic steering across radio access technologies and radio frequencies utilizing cell broadcast messages |
US9544841B2 (en) | 2012-12-06 | 2017-01-10 | At&T Intellectual Property I, L.P. | Hybrid network-based and device-based intelligent radio access control |
US9998983B2 (en) | 2012-12-06 | 2018-06-12 | At&T Intellectual Property I, L.P. | Network-assisted device-based intelligent radio access control |
US9008063B2 (en) | 2012-12-06 | 2015-04-14 | At&T Intellectual Property I, L.P. | Location based WI-FI radio activation and deactivation for mobile devices |
US9288735B2 (en) * | 2012-12-21 | 2016-03-15 | Samsung Electronics Co., Ltd. | Apparatus and method for switching radio access technology in wireless communication system |
MX348985B (en) | 2013-01-18 | 2017-07-06 | Ericsson Telefon Ab L M | Adapting a mobile network. |
CN103974355B (en) * | 2013-01-24 | 2019-03-05 | 电信科学技术研究院 | A kind of method and device of network switching |
US9282505B1 (en) * | 2013-01-24 | 2016-03-08 | Sprint Spectrum L.P. | Systems and methods of wireless communication access control |
JP5781103B2 (en) * | 2013-02-12 | 2015-09-16 | 株式会社Nttドコモ | Radio base station, user terminal, cell selection method, and radio communication system |
JP6262772B2 (en) * | 2013-02-18 | 2018-01-17 | エルジー エレクトロニクス インコーポレイティド | Method and apparatus for performing data transmission in a wireless communication system |
WO2014180714A1 (en) * | 2013-05-06 | 2014-11-13 | Deutsche Telekom Ag | Method for an improved cell selection/reselection by a user equipment trying to camp on a radio cell of a public land mobile network |
WO2014204102A1 (en) * | 2013-06-17 | 2014-12-24 | 엘지전자 주식회사 | Method for transmitting reference signal |
WO2015010267A1 (en) * | 2013-07-24 | 2015-01-29 | Telefonaktiebolaget L M Ericsson(Publ) | Methods and devices for cell selection |
US9693337B2 (en) | 2013-09-03 | 2017-06-27 | Qualcomm Incorporated | Method of enhancing user experience by using system information in LTE EMBMS |
CN104427536A (en) | 2013-09-10 | 2015-03-18 | 中兴通讯股份有限公司 | Pilot frequency measuring and evaluating method and device for trunked answering user |
US9380646B2 (en) | 2013-09-24 | 2016-06-28 | At&T Intellectual Property I, L.P. | Network selection architecture |
US9226197B2 (en) | 2013-10-21 | 2015-12-29 | At&T Intellectual Property I, L.P. | Network based speed dependent load balancing |
US9241305B2 (en) | 2013-10-28 | 2016-01-19 | At&T Intellectual Property I, L.P. | Access network discovery and selection function enhancement with cell-type management object |
CN105684518B (en) * | 2013-10-30 | 2019-06-21 | 华为终端有限公司 | A kind of method, device and mobile terminal of terminal persistent district |
US9998974B2 (en) | 2013-11-28 | 2018-06-12 | Nec Corporation | Wireless communication terminal, storage medium, and cell selection method |
US20160316411A1 (en) * | 2013-12-04 | 2016-10-27 | Lg Electronics Inc. | Cell selection method and measurement method for cell reselection |
WO2015115961A1 (en) | 2014-01-31 | 2015-08-06 | Telefonaktiebolaget L M Ericsson (Publ) | Methods and devices for conditional attachment to a network |
US9191858B1 (en) * | 2014-05-22 | 2015-11-17 | Sprint Spectrum L.P. | Broadcast cell loading information for wireless network access and handoff |
EP3180935B1 (en) * | 2014-08-15 | 2018-01-31 | Telefonaktiebolaget LM Ericsson (publ) | Adaptive cell selection in heterogeneous networks |
KR101679120B1 (en) | 2014-09-02 | 2016-12-07 | 주식회사 엘지유플러스 | Communication apparatus, control method thereof, recording medium for recording program for executing the control method, application saved in the recording medium for executing the control method being combined with hardware |
KR102217649B1 (en) * | 2014-10-15 | 2021-02-19 | 삼성전자 주식회사 | Method and apparatus for supporting seamless broadcast data in a wireless communication system |
US9635494B2 (en) | 2014-10-21 | 2017-04-25 | At&T Mobility Ii Llc | User equipment near-field communications gating according to kinetic speed detection and cell visitation history |
US9398518B2 (en) | 2014-10-21 | 2016-07-19 | At&T Intellectual Property I, L.P. | Cell broadcast for signaling resource load from radio access networks |
EP3241383B1 (en) | 2014-12-30 | 2019-02-20 | British Telecommunications public limited company | Cellular handover |
US10117160B2 (en) * | 2015-02-03 | 2018-10-30 | Verizon Patent And Licensing Inc. | Scanning for a preferred network during an active connection to another network |
US9900762B2 (en) | 2015-05-28 | 2018-02-20 | At&T Mobility Ii Llc | User equipment detection of interference-sensitive devices |
US10542547B2 (en) | 2015-09-01 | 2020-01-21 | Qualcomm Incorporated | Service-based cell selection and reselection |
CN109392051A (en) * | 2017-08-03 | 2019-02-26 | 中国移动通信有限公司研究院 | Control method, method, base station and the terminal of cell selection of load balancing |
KR102509073B1 (en) * | 2018-08-03 | 2023-03-13 | 삼성전자주식회사 | Method and apparatus for data communicating in a wireless communication system |
US11330478B2 (en) * | 2018-08-10 | 2022-05-10 | Qualcomm Incorporated | Idle cell reselection and user equipment capability signaling |
CN108834191B (en) * | 2018-09-11 | 2021-03-16 | Oppo广东移动通信有限公司 | Cell reselection method and device, electronic equipment and storage medium |
CN112243275A (en) * | 2019-07-17 | 2021-01-19 | 中国移动通信有限公司研究院 | Method for receiving neighbor cell information, method for sending neighbor cell information, terminal and base station |
CN114731733A (en) * | 2020-02-13 | 2022-07-08 | 中兴通讯股份有限公司 | Cell reselection techniques |
EP4342229A1 (en) * | 2021-05-17 | 2024-03-27 | InterDigital Patent Holdings, Inc. | Idle mode mobility in 5g networks applying small ultra low power (ulp) cells and regular (uu) cells |
GB2617553A (en) * | 2022-04-07 | 2023-10-18 | Canon Kk | Reselecting a new serving cell by a UE |
WO2023249367A1 (en) * | 2022-06-24 | 2023-12-28 | Lg Electronics Inc. | Handling of serving cell based on multicast measurement |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5905950A (en) * | 1995-07-12 | 1999-05-18 | Telefonaktienbolaget L M Ericsson | Method and apparatus for providing fixed cellular functionality |
US20040157600A1 (en) * | 2001-02-13 | 2004-08-12 | Martin Stumpert | Method for determining whether to grant access of a user equipment to a radio access network |
EP1509056A2 (en) * | 2003-08-22 | 2005-02-23 | Samsung Electronics Co., Ltd. | Cell reselection method for receiving packet data in a mobile communication system supporting MBMS |
WO2005101886A2 (en) * | 2004-04-16 | 2005-10-27 | Nokia Corporation | Frequency layer convergence method for mbms |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE516837C2 (en) * | 1998-12-18 | 2002-03-12 | Ericsson Telefon Ab L M | Method and means for determining handovers in a cellular radio communication system |
EP1259086A1 (en) * | 2001-05-15 | 2002-11-20 | Koninklijke Philips Electronics N.V. | Network of radio mobile telecommunications |
US7308258B2 (en) * | 2003-01-23 | 2007-12-11 | Interdigital Technology Corporation | Unsuitable cell exclusion in wireless communication systems |
KR20050013451A (en) * | 2003-07-28 | 2005-02-04 | 삼성전자주식회사 | Apparatus and method for determining soft handover in a cdma mobile communication system providing mbms service |
KR20060014631A (en) * | 2004-08-11 | 2006-02-16 | 삼성전자주식회사 | Cell selection/reselection method and system for considering congestion status of a cell in a mobile communication system |
JP4336633B2 (en) * | 2004-08-31 | 2009-09-30 | 京セラ株式会社 | Base station apparatus, radio communication terminal apparatus, communication method and program thereof |
US7483702B2 (en) * | 2004-10-20 | 2009-01-27 | Nokia Corporation | Cell reselection for improving network interconnection |
JP4181107B2 (en) * | 2004-11-25 | 2008-11-12 | 株式会社カシオ日立モバイルコミュニケーションズ | Handoff control method and mobile communication terminal |
KR100703269B1 (en) * | 2005-05-03 | 2007-04-03 | 삼성전자주식회사 | Cell reselection method of a mobile terminal in consideration of service quality |
JP2009505461A (en) * | 2005-08-09 | 2009-02-05 | フリースケール セミコンダクター インコーポレイテッド | Handover based on quality of service metric obtained from MAC layer of received signal |
US8260292B2 (en) * | 2007-02-15 | 2012-09-04 | Lg Electronics Inc. | Hierarchical service list |
EP2123080A1 (en) * | 2007-02-23 | 2009-11-25 | Nokia Corporation | Self optimization of forbidden neighbor cell list |
US9185682B2 (en) * | 2010-06-15 | 2015-11-10 | Mediatek Inc. | Methods to support continuous MBMS reception without network assistance |
-
2008
- 2008-03-13 KR KR1020097023569A patent/KR20100016463A/en not_active Application Discontinuation
- 2008-03-13 CN CN200880008194A patent/CN101637048A/en active Pending
- 2008-03-13 EP EP08726759A patent/EP2137996A2/en not_active Withdrawn
- 2008-03-13 CA CA002681004A patent/CA2681004A1/en not_active Abandoned
- 2008-03-13 US US12/047,786 patent/US20080227453A1/en not_active Abandoned
- 2008-03-13 AU AU2008226789A patent/AU2008226789B2/en not_active Ceased
- 2008-03-13 KR KR1020097021270A patent/KR20090130293A/en not_active Application Discontinuation
- 2008-03-13 WO PCT/US2008/003286 patent/WO2008112255A2/en active Application Filing
- 2008-03-13 MX MX2009009802A patent/MX2009009802A/en not_active Application Discontinuation
- 2008-03-13 AR ARP080101022A patent/AR065711A1/en unknown
- 2008-03-13 JP JP2009553615A patent/JP2010521876A/en active Pending
- 2008-03-13 RU RU2009137762/09A patent/RU2009137762A/en not_active Application Discontinuation
- 2008-03-13 TW TW097108941A patent/TW200841756A/en unknown
- 2008-03-13 BR BRPI0808232-4A patent/BRPI0808232A2/en not_active IP Right Cessation
-
2009
- 2009-09-13 IL IL200890A patent/IL200890A0/en unknown
-
2012
- 2012-07-06 US US13/543,263 patent/US20120275371A1/en not_active Abandoned
- 2012-08-15 JP JP2012180256A patent/JP2012253810A/en active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5905950A (en) * | 1995-07-12 | 1999-05-18 | Telefonaktienbolaget L M Ericsson | Method and apparatus for providing fixed cellular functionality |
US20040157600A1 (en) * | 2001-02-13 | 2004-08-12 | Martin Stumpert | Method for determining whether to grant access of a user equipment to a radio access network |
EP1509056A2 (en) * | 2003-08-22 | 2005-02-23 | Samsung Electronics Co., Ltd. | Cell reselection method for receiving packet data in a mobile communication system supporting MBMS |
WO2005101886A2 (en) * | 2004-04-16 | 2005-10-27 | Nokia Corporation | Frequency layer convergence method for mbms |
Non-Patent Citations (1)
Title |
---|
See also references of EP2137996A2 * |
Cited By (60)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2012509029A (en) * | 2008-11-14 | 2012-04-12 | クゥアルコム・インコーポレイテッド | GPS-assisted cell selection for mobile devices |
US9148831B2 (en) | 2008-11-14 | 2015-09-29 | Qualcomm Incorporated | GPS-assisted cell selection for mobile devices |
WO2010127835A1 (en) * | 2009-05-04 | 2010-11-11 | Research In Motion Limited | Methods and apparatus to process signal strengths of not allowed cells during cell reselection |
US8483688B2 (en) | 2009-05-04 | 2013-07-09 | Research In Motion Limited | Methods and apparatus to process signal strengths of not allowed cells during cell reselection |
WO2011092126A1 (en) | 2010-01-28 | 2011-08-04 | St-Ericsson Sa | Cell selection and reselection in a telecommunication network |
EP2355589A1 (en) * | 2010-01-28 | 2011-08-10 | ST-Ericsson SA | Cell selection and reselection in a telecommunication network |
JP2013518493A (en) * | 2010-01-28 | 2013-05-20 | エスティー‐エリクソン、ソシエテ、アノニム | Cell selection and reselection in communication networks |
CN107070615A (en) * | 2010-02-10 | 2017-08-18 | 金峰创新公司 | The apparatus and method of uplink synchronisation are set up in a wireless communication system |
CN107070615B (en) * | 2010-02-10 | 2020-06-30 | 泛泰有限公司 | Apparatus and method for establishing uplink synchronization in wireless communication system |
US8320921B2 (en) | 2010-02-12 | 2012-11-27 | Nokia Corporation | Method and apparatus for cell selection in flexible spectrum use radio system |
CN103250450A (en) * | 2010-11-30 | 2013-08-14 | 捷讯研究有限公司 | Cell re-selection using a ranking algorithm |
CN103250450B (en) * | 2010-11-30 | 2017-06-23 | 黑莓有限公司 | For the method and apparatus of cell reselection |
EP2458921A1 (en) * | 2010-11-30 | 2012-05-30 | Research In Motion Limited | Cell re-selection in a cellular telecommunications network |
WO2012072716A1 (en) | 2010-11-30 | 2012-06-07 | Research In Motion Limited | Cell re-selection using a ranking algorithm |
WO2012072714A1 (en) * | 2010-11-30 | 2012-06-07 | Research In Motion Limited | Cell re-selection in a cellular telecommunications network |
AU2011334952A8 (en) * | 2010-11-30 | 2016-07-07 | Blackberry Limited | Cell re-selection in a cellular telecommunications network |
US9445337B2 (en) | 2010-11-30 | 2016-09-13 | Blackberry Limited | Cell re-selection using a ranking algorithm |
CN106851789B (en) * | 2010-11-30 | 2020-11-24 | 黑莓有限公司 | Cell reselection in a cellular telecommunications network |
AU2011334952B2 (en) * | 2010-11-30 | 2015-06-11 | Blackberry Limited | Cell re-selection in a cellular telecommunications network |
CN106851789A (en) * | 2010-11-30 | 2017-06-13 | 黑莓有限公司 | Cell reselection in cellular telecommunication network |
WO2012072147A1 (en) * | 2010-12-03 | 2012-06-07 | Nokia Siemens Networks Oy | Enhanced mobility control in heterogeneous networks |
US9622138B2 (en) | 2011-02-16 | 2017-04-11 | Blackberry Limited | UE measurement procedure in a heterogeneous mobile network |
US9794850B2 (en) | 2011-02-16 | 2017-10-17 | Blackberry Limited | Procedure for formulating a signal to interference plus noise ratio |
US9301184B2 (en) | 2011-02-16 | 2016-03-29 | Blackberry Limited | Procedure for formulating a signal to interference plus noise ratio |
WO2012112185A1 (en) * | 2011-02-16 | 2012-08-23 | Research In Motion Limited | Procedure for formulating a signal to interference plus noise ratio |
WO2012112184A1 (en) * | 2011-02-16 | 2012-08-23 | Research In Motion Limited | Ue measurement procedure in a heterogeneous mobile network |
CN103098386B (en) * | 2011-03-31 | 2015-12-23 | Lg电子株式会社 | Method and the device thereof of service are provided to subscriber equipment in a wireless communication system |
EP2692074A4 (en) * | 2011-03-31 | 2014-10-08 | Lg Electronics Inc | Method of providing service to user equipment in wireless communication system and apparatus thereof |
EP2692074A2 (en) * | 2011-03-31 | 2014-02-05 | LG Electronics Inc. | Method of providing service to user equipment in wireless communication system and apparatus thereof |
WO2012134182A2 (en) | 2011-03-31 | 2012-10-04 | Lg Electronics Inc. | Method of providing service to user equipment in wireless communication system and apparatus thereof |
CN103098386A (en) * | 2011-03-31 | 2013-05-08 | Lg电子株式会社 | Method of providing service to user equipment in wireless communication system and apparatus thereof |
US9137718B2 (en) | 2012-01-12 | 2015-09-15 | Qualcomm Incorporated | Cell reselection based on multimedia broadcast multicast service (MBMS) metrics |
WO2013106654A1 (en) * | 2012-01-12 | 2013-07-18 | Qualcomm Incorporated | Cell reselection based on multimedia broadcast multicast service (mbms) metrics |
GB2498395B (en) * | 2012-01-16 | 2014-10-08 | Broadcom Corp | A method and apparatus for modifying one or more cell reselection parameters |
US8909216B2 (en) | 2012-01-16 | 2014-12-09 | Broadcom Corporation | Inter-cell device discovery in device-to-device communication |
GB2498395A (en) * | 2012-01-16 | 2013-07-17 | Renesas Mobile Corp | Modifying cell reselection parameters in response to observing a device-to-device discovery signal |
KR101595682B1 (en) * | 2012-01-24 | 2016-02-18 | 블랙베리 리미티드 | Performing idle mode mobility measurements in a mobile communication network |
US8942205B2 (en) | 2012-01-24 | 2015-01-27 | Blackberry Limited | Performing idle mode mobility measurements in a mobile communication network |
KR20140114888A (en) * | 2012-01-24 | 2014-09-29 | 블랙베리 리미티드 | Performing idle mode mobility measurements in a mobile communication network |
WO2013110735A3 (en) * | 2012-01-24 | 2013-10-24 | Research In Motion Limited | Performing idle mode mobility measurements in a mobile communication network |
EP2621222A1 (en) * | 2012-01-24 | 2013-07-31 | Research In Motion Limited | Performing idle mode mobility measurements in a mobile communication network |
CN104145508A (en) * | 2012-01-24 | 2014-11-12 | 黑莓有限公司 | Performing idle mode mobility measurements in a mobile communication network |
EP3018944A1 (en) * | 2014-11-04 | 2016-05-11 | Acer Incorporated | Method of handling cell reselection |
TWI583217B (en) * | 2014-11-04 | 2017-05-11 | 宏碁股份有限公司 | Method of handling cell reselection |
US10182383B2 (en) | 2014-11-04 | 2019-01-15 | Acer Incorporated | Method of handling cell reselection |
US9907003B2 (en) | 2014-11-04 | 2018-02-27 | Acer Incorporated | Method of handling cell reselection |
WO2016096625A1 (en) * | 2014-12-17 | 2016-06-23 | Thomson Licensing | Wlan user quality of experience control in a multi-access point environment |
KR102382786B1 (en) | 2014-12-17 | 2022-04-06 | 인터디지털 씨이 페이튼트 홀딩스, 에스에이에스 | Wlan user quality of experience control in a multi-access point environment |
KR20170094438A (en) * | 2014-12-17 | 2017-08-17 | 톰슨 라이센싱 | Wlan user quality of experience control in a multi-access point environment |
US11902848B2 (en) | 2014-12-17 | 2024-02-13 | Interdigital Ce Patent Holdings | WLAN user quality of experience control in a multi-access point environment |
US11363515B2 (en) | 2014-12-17 | 2022-06-14 | Interdigital Ce Patent Holdings | WLAN user quality of experience control in a multi-access point environment |
EP3035741A1 (en) * | 2014-12-17 | 2016-06-22 | Thomson Licensing | WLAN user quality of experience control in a multi-access point environment |
EP3972350A1 (en) * | 2014-12-17 | 2022-03-23 | InterDigital CE Patent Holdings | Wlan user quality of experience control in a multi-access point environment |
WO2016107887A1 (en) * | 2014-12-30 | 2016-07-07 | British Telecommunications Public Limited Company | Cell reselection |
US10123241B2 (en) | 2014-12-30 | 2018-11-06 | British Telecommunications Public Limited Company | Cell reselection |
US11240717B2 (en) | 2018-04-04 | 2022-02-01 | Samsung Electronics Co., Ltd. | Method and apparatus for performing cell reselection in wireless communication system |
KR102399152B1 (en) | 2018-04-04 | 2022-05-18 | 삼성전자주식회사 | Method and apparatus for performing a cell reselection in wireless communication system |
KR20190116015A (en) * | 2018-04-04 | 2019-10-14 | 삼성전자주식회사 | Method and apparatus for performing a cell reselection in wireless communication system |
WO2019194526A1 (en) * | 2018-04-04 | 2019-10-10 | Samsung Electronics Co., Ltd. | Method and apparatus for performing cell reselection in wireless communication system |
EP3952445A4 (en) * | 2019-04-26 | 2022-05-18 | Huawei Technologies Co., Ltd. | Cell selection method, cell reselection method and chip |
Also Published As
Publication number | Publication date |
---|---|
BRPI0808232A2 (en) | 2014-07-22 |
CA2681004A1 (en) | 2008-09-18 |
US20080227453A1 (en) | 2008-09-18 |
AU2008226789B2 (en) | 2011-06-16 |
AU2008226789A1 (en) | 2008-09-18 |
JP2010521876A (en) | 2010-06-24 |
CN101637048A (en) | 2010-01-27 |
EP2137996A2 (en) | 2009-12-30 |
KR20100016463A (en) | 2010-02-12 |
MX2009009802A (en) | 2009-11-18 |
KR20090130293A (en) | 2009-12-22 |
US20120275371A1 (en) | 2012-11-01 |
TW200841756A (en) | 2008-10-16 |
IL200890A0 (en) | 2010-05-17 |
RU2009137762A (en) | 2011-04-20 |
AR065711A1 (en) | 2009-06-24 |
JP2012253810A (en) | 2012-12-20 |
WO2008112255A3 (en) | 2009-02-05 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
AU2008226789B2 (en) | Cell reselection process for wireless communications | |
US10034217B2 (en) | Method for inter-radio access technology cell reselection | |
KR101084442B1 (en) | Method of measuring cell in wireless communication system | |
US8886184B2 (en) | Method of performing cell reselection procedure in wireless communication system | |
US8121602B2 (en) | Method of reselecting a cell based on priorities | |
US8787912B2 (en) | Method and apparatus for coordination of handoff among MMSS and RAT priorities | |
US20150282030A1 (en) | Method and apparatus for reducing power consumption in volte enabled devices | |
KR20100137499A (en) | Mehtod for detecting cell in mobile communications system |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 200880008194.2 Country of ref document: CN |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 08726759 Country of ref document: EP Kind code of ref document: A2 |
|
DPE1 | Request for preliminary examination filed after expiration of 19th month from priority date (pct application filed from 20040101) | ||
WWE | Wipo information: entry into national phase |
Ref document number: 2681004 Country of ref document: CA |
|
WWE | Wipo information: entry into national phase |
Ref document number: PI20093785 Country of ref document: MY |
|
WWE | Wipo information: entry into national phase |
Ref document number: 200890 Country of ref document: IL |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2008226789 Country of ref document: AU Ref document number: 2009553615 Country of ref document: JP Ref document number: 5888/DELNP/2009 Country of ref document: IN Ref document number: MX/A/2009/009802 Country of ref document: MX |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
DPE1 | Request for preliminary examination filed after expiration of 19th month from priority date (pct application filed from 20040101) | ||
ENP | Entry into the national phase |
Ref document number: 2008226789 Country of ref document: AU Date of ref document: 20080313 Kind code of ref document: A |
|
ENP | Entry into the national phase |
Ref document number: 20097021270 Country of ref document: KR Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2009137762 Country of ref document: RU Ref document number: 2008726759 Country of ref document: EP |
|
ENP | Entry into the national phase |
Ref document number: PI0808232 Country of ref document: BR Kind code of ref document: A2 Effective date: 20090914 |