WO2013050949A1 - Attribution de priorité à des technologies d'accès radio - Google Patents

Attribution de priorité à des technologies d'accès radio Download PDF

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Publication number
WO2013050949A1
WO2013050949A1 PCT/IB2012/055310 IB2012055310W WO2013050949A1 WO 2013050949 A1 WO2013050949 A1 WO 2013050949A1 IB 2012055310 W IB2012055310 W IB 2012055310W WO 2013050949 A1 WO2013050949 A1 WO 2013050949A1
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WO
WIPO (PCT)
Prior art keywords
list
serving cell
utran
measurement list
radio access
Prior art date
Application number
PCT/IB2012/055310
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English (en)
Inventor
Brian Martin
Christopher Callender
Original Assignee
Renesas Mobile Corporation
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
Priority claimed from US13/251,363 external-priority patent/US20130084850A1/en
Priority claimed from GB1116979.4A external-priority patent/GB2492183B/en
Application filed by Renesas Mobile Corporation filed Critical Renesas Mobile Corporation
Priority to CN201280048574.5A priority Critical patent/CN103843411A/zh
Priority to DE112012004118.6T priority patent/DE112012004118T5/de
Publication of WO2013050949A1 publication Critical patent/WO2013050949A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/16—Discovering, processing access restriction or access information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports

Definitions

  • the exemplary and non-limiting embodiments of this invention relate generally to wireless communication systems, methods, devices and computer programs, and more specifically relate to selecting neighbor cells, both inter- frequency and inter-radio access technology, for measurements by a user equipment.
  • SINR signal to interference plus noise ratio
  • GB-A-2484011 concerns measuring inter- frequency and inter-RAT neighbor cells and describes that the UE's measurement occasions are used for different neighbor cells depending on whether the UE has good or marginal coverage with its serving cell. It describes a priority re-selection algorithm in the E-UTRAN system by which the network can prioritize measurements of either a frequency layer or a RAT over another, so as to more efficiently use the available measurement occasions depending on the strength of the serving cell.
  • Basic coverage is more important when the serving cell is weak.
  • Service such as looking for hot spot coverage to enable additional or enhanced mobile services beyond simply cellular call coverage, is more important when signal strength from the serving cell is stronger and maintaining a basic connection with the serving cell is not reasonably in doubt over the near term.
  • the invention described in GB-A-2484011 prioritizes a lower priority neighbor cell search to better ensure an alternative cell for maintaining connectivity in case signal strength from its serving cell deteriorates further, whereas in the latter instance the UE can override the 3 GPP Release 99 measurement purposes and use its measurement occasions to detect high priority RATs and/or inter- frequencies that might offer enhanced services such as the increased data rates available through the E-UTRAN system.
  • the invention described in GB-A-2484011 used two different thresholds Sprioritysearchi and S priority search2 against which the serving cell signal strength was compared. If the received power and quality of the serving cell goes below either threshold, then the UE needs to perform a search on the GERAN and UTRAN RATs meeting the specified performance requirements. If the strength and quality of the serving cell is above both thresholds, then the UE is not required to measure the lower priority RATs, and hence what was in the prior art as "spare" measurement occasions are instead used to measure the higher priority LTE RAT. This enables the UE to switch between coverage or service based measurements depending on the quality of the serving cell.
  • the 3 GPP organization is now exploring measurements and reselections for a UE in the CELL FACH state to the E-UTRAN (LTE) system. See for example document RP- 110913 entitled WID UPDATE TO FURTHER ENHANCEMENTS OF CELL FACH by Renesas Mobile Europe, TeliaSonera, Ericsson and ST-Ericsson (3 GPP TSG-RAN Meeting #52; Bratislava, Slovakia; 31 May to 3 June, 2011) and RP-111321 entitled UPDATED WID: FURTHER ENHANCEMENTS TO CELL FACH by Renesas Mobile Europe, TeliaSonera, Ericsson and ST-Ericsson (3 GPP TSG-RAN Meeting #53; Fukukoa, Japan; 13 September to 16 September, 2011). If one extends this principle to GERAN and UTRAN also, there would need to be a search in the various different RATs to maintain basic coverage for the UE.
  • GB-A-2484011 can be implemented so as not to impact the conventional performance for search and measurement of GERAN and UTRAN RATs.
  • E-UTRAN is included in the low priority coverage search is not so straightforward because there are multiple frequency layers in GERAN, UTRAN and E-UTRAN which means that performing measurements on E-UTRAN may compromise the performance of GERAN and UTRAN measurements, similar to the 30% degradation described in the background section of GB-A-2484011.
  • an apparatus comprising a processing system and a memory.
  • the processing system is arranged to cause the apparatus to: store in the memory a prioritized measurement list, each entry in the prioritized measurement list defining a unique combination of frequency layer and radio access technology for a serving cell and for neighbor cells; and based on at least signal strength of the serving cell, select from a neighbor list according to the prioritized measurement list a set of entries for measuring according to a selection rule.
  • the selection rule provides: for the case in which the signal strength of the serving cell is relatively high, the selected set is a first set and represents at least higher priority ones of the prioritized measurement list; and for the case in which the signal strength of the serving cell is relatively low, the selected set is a second set and represents at least lower priority ones of the prioritized measurement list.
  • the selecting may be based on signal strength and signal quality of the serving cell.
  • a method comprising: storing in a computer readable memory a prioritized measurement list, each entry in the prioritized measurement list defining a unique combination of frequency layer and radio access technology for a serving cell and for neighbor cells; and based on at least signal strength of the serving cell, selecting from a neighbor list according to the prioritized measurement list a set of entries for measuring according to a selection rule.
  • the selection rule provides: for the case in which the signal strength of the serving cell is relatively high, the selected set is a first set and represents at least higher priority ones of the prioritized measurement list; and for the case in which the signal strength of the serving cell is relatively low, the selected set is a second set and represents at least lower priority ones of the prioritized measurement list.
  • the selecting may be based on signal strength and signal quality of the serving cell.
  • a computer program comprising a set of instructions which, when executed by a computing system, causes the computing system to perform the steps of storing in a computer readable memory a prioritized measurement list, each entry in the prioritized measurement list defining a unique combination of frequency layer and radio access technology for a serving cell and for neighbor cells; and based on at least signal strength of the serving cell, selecting from a neighbor list according to the prioritized measurement list a set of entries for measuring according to a selection rule.
  • the selection rule provides: for the case in which the signal strength of the serving cell is relatively high, the selected set is a first set and represents at least higher priority ones of the prioritized measurement list; and for the case in which the signal strength of the serving cell is relatively low, the selected set is a second set and represents at least lower priority ones of the prioritized measurement list.
  • the selecting may be based on signal strength and signal quality of the serving cell.
  • Figure 1 is a schematic diagram showing a user equipment and multiple inter- frequency and inter-RAT neighbor cells about a serving cell, and illustrates an exemplary environment in which embodiments of these teachings may be practiced to advantage;
  • Figure 2 is a logic flow diagram that illustrates the operation of a method, and a result of execution of computer program instructions embodied on a computer readable memory, in accordance with the exemplary embodiments of this invention.
  • FIG 3 is a simplified block diagram of the UE in communication with a wireless network illustrated as a base station and a RNC, which are exemplary electronic devices suitable for use in practicing the exemplary embodiments of this invention.
  • Figure 1 shows an exemplary environment in which embodiments of the invention may be practiced to advantage.
  • a UE under control of a UTRAN serving cell, and for purposes of the examples below there are five arbitrarily numbered neighbor cells as follows: neighbor cell #1 is operating on LTE frequency #1 and so is an inter-RAT neighbor cell respecting the serving cell; neighbor cell #2 is operating on UTRAN frequencies #1 and #2 which are inter- frequencies to the UTRAN frequency of the serving cell; neighbor cell #3 is a operating on GERAN frequency #1 and so is an inter-RAT neighbor cell; neighbor cell #4 is operating on LTE frequency #2 and so is an inter-RAT neighbor cell; and neighbor cell #5 is operating on GERAN frequency #2 and so is an inter-RAT neighbor cell.
  • a neighbor cell is inter-RAT or inter-frequency is relative to the serving cell.
  • a single neighbor base station operating on multiple RATs simultaneously may be both inter-RAT and inter-frequency, but for clarity it will be considered as two "cells" just as each frequency layer of neighbor cell #2 may be considered a separate inter-frequency cell. It is convenient to consider each different neighbor cell frequency, whether it is inter- frequency or inter-RAT, as a distinct frequency layer.
  • the serving cell provides to its UE a neighbor cell list which the UE uses to learn which frequencies to monitor and measure for mobility purposes.
  • the UE will measure the neighbor cells on its list during its measurement opportunities, at which times the serving cell knows not to transmit to the UE since the assumption is the UE has one RF receive chain and cannot simultaneously receive on two frequencies.
  • Figure 1 shows the UE can measure signal strength, or a quality measure from the neighbor cells' transmissions.
  • the UE will prioritize the members of its neighbor cell list and measure them according to those priorities, during its scheduled measurement opportunities or natural DRX based measurements.
  • the network can exert some limited control or total control over how the priorities are set so it can control to one extent or another from which neighbor cells it will receive measurements via the UE.
  • Each entry on the prioritized list which is stored in the UE's local memory, and which the UE accesses each time it needs to check which cells to measure, defines a unique combination of RAT and frequency. That is, there is a distinct entry in the list for each frequency layer.
  • the list would have a total of 7 entries (including the serving cell UTRAN frequency).
  • the UE utilizes a rule to select from its prioritized list of set of entries for measuring. Seven is typically too many layers to measure with good performance, so the rule would operate to exclude some entries.
  • a rule that operates to exclude certain entries as in the examples below is identical in effect to an inverse of the same rule which operates to include all of the opposed entries, so both inclusionary rules and exclusionary rules are encompassed by these teachings regardless of the specific examples below.
  • One aspect of such a rule is that it will always select, from the list, entries representing at least two RATs for the UE to measure.
  • applying the rule while the UE is seeking coverage will operate to exclude higher priority list entries and return a set of entries to measure that is biased to the lower priority neighbor cell frequency layers, to better ensure an alternative cell is available to maintain coverage.
  • the rule when the rule is applied while the UE is seeking enhanced services (when serving cell signal strength is above a threshold, i.e. is relatively high) it will operate to exclude lower priority entries and return a set of entries to measure that is biased to the higher priority neighbor cell frequency layers, to better aid the UE in finding those enhanced services. But in all cases the rule will return entries representing at least two RATs.
  • the UE will prioritize all of the frequency layers. For those instances in which there is an LTE cell in the neighbor cell list, this allows the UE to consider including one or more LTE frequency layers for measurement in a coverage limited scenario.
  • a threshold e.g. is relatively low
  • the measurement list is organized according to an absolute priority which is also used to prioritize reselections themselves.
  • the rule, or set of rules is implicit in that the UE applies them any time the neighbor cell list includes three or more RATs.
  • the implicit rule is to drop or exclude from the measurement set all of the entries associated with one of the three RATs, so the UE is required to measure no more than two RATs, particularly for the coverage limited case (low signal strength from the serving cell).
  • This embodiment is advantageous in that minimum signalling changes are required as compared to conventional practice.
  • the network can maintain control over which RATs are retained and which are excluded from the measurement set in that it can, if needed, send dedicated signalling to individual UEs giving RAT-specific absolute priorities for reselection of cells once they have been detected and measured.
  • the lowest priority RAT can be excluded from the selected measurement set while prioritising the RAT(s) assigned the highest absolute priorities, and/or the network may instead exclude the highest priority RAT since it is already measured in the non- coverage limited case (where serving cell signal strength is good and the measurements are biased to find enhanced services) and instead prioritize measurements of the lower priority RAT(s) which are not measured in the non- coverage limited case.
  • a new information element to indicate to the UE the measurement priority of the E-UTRAN RAT. This would be an explicit indication as to whether the UE should drop GERAN or UTRAN in order to measure LTE.
  • the additional signaling of this new information element has the same result as the rule above but in this case the network does not need to modify the absolute priority information by signalling dedicated priorities (which can be valid as the UE hands over across multiple cells) in order to achieve the correct prioritization in a particular cell or scenario, but rather sends the new information element with a different RAT measurement priority.
  • the rule When applying the rule to the neighbor cell list the UE only needs to drop GERAN or UTRAN if the neighbor cell list includes GERAN, UTRAN and LTE neighbor cells. In case the neighbor cell list has only cells of two RATs then the rule does not exclude any of the RATs and the UE's measurement set includes both RATs.
  • the network signals to the UE a new information element that indicates a "weight" for each RAT, for example a value between zero and one.
  • a weight for each RAT
  • This embodiment is a little more complex to implement but gives the network full control of the measurement performance.
  • the network operator may choose to compromise only GERAN performance to fit in LTE performance, so for example GERAN and LTE measurements take a lesser share of the available measurement occasions or natural DRX gaps, but UTRAN measurements take a greater share.
  • the network operator may choose to impact GERAN and UTRAN only slightly, and cause the UE to perform limited LTE measurements. In this manner the network can more finely tune the UE's measurement performance, based on the deployment of neighbor cells and frequency layers.
  • the UEs that do support the prioritisation rules can indicate such to the network, such as in the UE context the serving cell fetches from the UE's home network or from signalling directly from the UE when it becomes active in the serving cell.
  • the network can signal the RAT measurement priority in broadcast system information, or in dedicated signalling, or both for example by broadcasting a cell- wide RAT measurement priority which it overwrites per-UE when needed.
  • broadcast system information or in dedicated signalling, or both for example by broadcasting a cell- wide RAT measurement priority which it overwrites per-UE when needed.
  • the UE Upon transition from CELL DCH to CELL FACH/CELL PCH/URA PCH state, the UE shall:
  • System Information Block type 12 (or System Information Block type 11);
  • variable HS DSCH RECEPTION CELL FACH STATE is set to TRUE and the variable H S_D S CH DRX CELL F ACH ST ATUS is set to TRUE:
  • the UE Upon transition from idle mode to CELL FACH state, the UE shall:
  • variable HS DSCH RECEPTION CELL FACH STATE is set to TRUE and the variable HS DSCH DRX CELL FACH STATUS is set to TRUE:
  • the UE chooses the two RATs to be measured according to the standardized rules based on an absolute priority in the prioritized neighbor cell list, and performs measurements meeting the similar performance as in conventional measurements. Since the rules which select a set from the prioritized list in this case return no more than two RATs, the third (and fourth if one exists) RAT is not measured.
  • prioritization rules might conveniently be specified for UTRAN in 3 GPP TS 25.304 (procedure) and/or 25.133 (performance).
  • the neighbor cell list includes five entries or frequency layers, which the rule prioritizes as follows: LTE (freql) priority 1
  • the rule is to drop measurements of the highest priority RAT if there are three or more RATs in the neighbor cell list. So in this case the UE shall prioritize measurements of UTRAN and GERAN low priority layers for the case of coverage based measurements (low signal strength and quality from the serving cell) and drop the higher priority LTE. For the case of service based measurements the UE shall measure LTE and UTRAN and drop the lower priority RAT GERAN.
  • the neighbor cell list includes four entries or frequency layers, which the rule prioritizes as follows:
  • the UE shall prioritize measurements of UTRAN and LTE layers in case of coverage based measurements.
  • the UE shall measure LTE.
  • the difference between the first and second examples is that in the second there are only two RATs in the neighbor cell list provided by the network to the UE, and so the rule will always return a measurement set having them both.
  • the neighbor cell list includes seven entries or frequency layers, which the rule prioritizes as follows:
  • the rule is that the UE drops the lowest priority RAT from the prioritized list to obtain its measurement set, meaning that the UE shall select for the measurement set the highest priority layer and compare.
  • the UE shall prioritize LTE and UTRAN for the case of coverage based measurements and drop GERAN, and for the case of service based measurements the UE shall measure all three of LTE, GERAN and UTRAN (which is allowable for the service based application of the rule since maintaining coverage is not a primary concern and the performance requirement is sufficiently relaxed to allow all three RATs to be measured within the specified limits).
  • inventions may employ different variations to the measurement set selection rule other than dropping the highest or lowest RAT or entry from the prioritized neighbor cell list.
  • Any of the above embodiments may be implemented by signalling a new information element from the network to the UE which includes a BOOLEAN operator for example to determine whether the lowest or the highest priority RAT should be dropped.
  • a BOOLEAN operator is readily configurable by the network to maintain control over which neighbor frequency layers get reported under various conditions of serving cell received signal strength at the UE.
  • the network signals a weighting factor for the various RATs in the neighbor cell list.
  • the RAT-specific weighting factor may be selected from ⁇ 0,1 ⁇ meaning the UE is to measure cells in the 1 -weighted RAT and is to not measure cells in the 0- weighted RAT (e.g., the weighting factors indicate either measure or do not measure).
  • a new information element is used to indicate to the UE the priority of E- UTRAN/LTE, such a priority indication may be selected by the network from the set consisting of ⁇ GERAN, UTRAN, none ⁇ . This indicates which RAT should be dropped in favor of LTE measurements.
  • LTE will be measured only if there are no GERAN neighbors, or no UTRAN neighbors with a priority and threshold (for example, this can occur depending on the dedicated signalling of RAT priority information).
  • this new information element will have enumerated values to specify which RATs will be dropped (or alternatively which RATs will be measured). This also can be specified in the 3GPP TS 25.304 and 25.133 as noted above.
  • the RAT weighting factor is given as a percentage ratio compared to other RATs.
  • the sum of all RATs should be no more than 100%, and so the performance requirement is then adjusted according to the weight.
  • the Information Element will then have a list of weights for each RAT to be measured.
  • the performance requirement will be scaled according to the relative weights, however signaled. For example 50%> corresponds to the conventional UTRAN requirement whereby the UE has to measure 2 RATs simultaneously, but 25% will mean the UE cell search and measurement period requirements are extended by a factor of two as compared to conventional practice. In this manner the UE can spread the measurements, freeing more measurement occasions or natural DRX opportunities to be used to measure other RATs.
  • the scaling is performed such that the UE still uses the same number of measurement occasions or natural DRX opportunities to perform a measurement, but the total measurement/averaging may be spread over time, or delayed such as would be the case where one RAT is measured first.
  • teachings allow measurements of LTE in coverage limited scenarios while the UE is in the CELL FACH state. Another advantage is that these teachings allow the UEs to measure the legacy RATs without adverse impact on the legacy performance requirements (in case one RAT is dropped so the measurement set includes only two RATs). And a third technical effect is that these teachings allow the network operator full control over the requirements for the implementations where the network provides RAT-specific weighting factors, which means the legacy performance can be impacted minimally or more substantially depending on how far the signalled weights differ from the effect of conventional practice.
  • Figure 2 is a logic flow diagram which describes an exemplary embodiment of the invention from the perspective of the UE.
  • Figure 2 may be considered to illustrate the operation of a method, and a result of execution of a computer program stored in a computer readable memory, and a specific manner in which components of an electronic device/apparatus are configured to cause that electronic device or apparatus to operate.
  • the various blocks shown in Figure 2 may also be considered as a plurality of coupled logic circuit elements constructed to carry out the associated function(s), or specific result of strings of computer program code stored in a memory.
  • Such blocks and the functions they represent are non- limiting examples, and may be practiced in various components such as integrated circuit chips and modules, and that the exemplary embodiments of this invention may be realized in an apparatus that is embodied as an integrated circuit.
  • the integrated circuit, or circuits may comprise circuitry (as well as possibly firmware) for embodying at least one or more of a data processor or data processors, a digital signal processor or processors, baseband circuitry and radio frequency circuitry that are configurable so as to operate in accordance with the exemplary embodiments of this invention.
  • the UE stores in its memory a prioritized measurement list, each entry in the prioritized measurement list defining a unique combination of frequency layer and RAT for a serving cell and for neighbor cells.
  • the UE selects, from the neighbor list it get from the network according to the prioritized measurement list, a set of entries for measuring according to a selection rule.
  • Block 206 gives details of the selection rule.
  • the selected set is a first set and represents higher measurement priority ones of the prioritized measurement list; and for the case in which the signal strength of the serving cell is relatively low, the selected set is a second set and represents lower measurement priority ones of the prioritized measurement list.
  • Block 208 gives further detail for block 206 using the specific examples above.
  • Block 210 also follows from block 206, and provides that the UE generates the prioritized measurement list at least in part using signaling received from the serving cell which provides relative priority information for the RATs represented by the entries of the prioritized measurement list. Further detail of this is at block 212, in which the UE generates the list at least in part using weighting factors received from the serving cell which are specific for each of the RATs represented by the entries of the prioritized list. And block 214 gives yet further detail in which the UE uses the set of entries of the prioritized measurement list to take measurements of cells according to a measurement scaling frequency which spreads the entries of the set across measurement occasions according to the weighting factors.
  • Another alternative at block 210 for how the UE generates the prioritized measurement list is from one or more RAT-specific absolute priority lists the UE receives from the network. These absolute priority lists are for the reselection of cells once those cells have been detected and measured.
  • Block 216 gives two different embodiments.
  • the UE generates the prioritized measurement list from the neighbor list (mentioned at block 204) received from a wireless network anytime there are at least three radio access technologies represented in the received neighbor cell list. That is to say, the UE applies the rule only when the received neighbor list includes three (or more) RATs. This is the implicit rule mentioned above with the absolute priority.
  • the UE wirelessly receives the prioritized measurement list in system information broadcast by the serving cell or from dedicated signaling received from the serving cell.
  • Figure 2 may be considered to represent actions of a modem which may be separable from or fixedly disposed within the above UE.
  • a wireless network (base station 22 and RNC 24) is adapted for communication over a wireless link 21 with an apparatus, such as a mobile terminal or UE 20, via a network access node such as a base station/NodeB 22 or relay station.
  • the network may include a radio network controller RNC 24, which provides connectivity with further networks (e.g., a publicly switched telephone network PSTN and/or a data communications network/Internet) .
  • the UE 20 includes processing means such as at least one data processor (DP)
  • DP data processor
  • MEM 20A storing means such as at least one computer-readable memory (MEM) 20B storing at least one computer program (PROG) 20C, and communicating means such as a transmitter TX 20D and a receiver RX 20E for bidirectional wireless communications with the base station 22 via one or more antennas 20F.
  • MEM computer-readable memory
  • PROG computer program
  • communicating means such as a transmitter TX 20D and a receiver RX 20E for bidirectional wireless communications with the base station 22 via one or more antennas 20F.
  • TX 20D computer-readable memory
  • PROG computer program
  • the base station 22 also includes processing means such as at least one data processor (DP) 22A, storing means such as at least one computer-readable memory (MEM) 22B storing at least one computer program (PROG) 22C, and communicating means such as a transmitter TX 22D and a receiver RX 22E for bidirectional wireless communications with the UE 20 via one or more antennas 22F.
  • the base station 22 also includes at unit 22G the RAT-specific weights which it sends to the UE in system information or dedicated signalling according to several of the specific embodiments detailed above.
  • the RNC 24 includes processing means such as at least one data processor (DP) 24A, storing means such as at least one computer-readable memory (MEM) 24B storing at least one computer program (PROG) 24C, and communicating means such as a modem 24H for bidirectional wireless communications with the base station 22 via the data/control path 25. While not particularly illustrated for the UE 20 or base station 22, those devices are also assumed to include as part of their wireless communicating means a modem which may be inbuilt on an RF front end chip within those devices 20, 22 and which also carries the TX 20D/22D and the RX 20E/22E.
  • DP data processor
  • MEM computer-readable memory
  • PROG computer program
  • At least one of the PROGs 20C/20G in the UE 20 is assumed to include program instructions that, when executed by the associated DP 20A, enable the device to operate in accordance with the exemplary embodiments of this invention, as detailed above.
  • the base station 22 may also have software stored in its MEM 22B to implement certain aspects of these teachings as detailed above, such as the examples above in which the base station sends to the UE the RAT-specific weighting factors.
  • the exemplary embodiments of this invention may be implemented at least in part by computer software stored on the MEM 20B, 22B which is executable by the DP 20A of the UE 20 and/or by the DP 22A of the base station 22, or by hardware, or by a combination of tangibly stored software and hardware (and tangibly stored firmware).
  • Electronic devices implementing these aspects of the invention need not be the entire UE 20 or base station 22, but exemplary embodiments may be implemented by one or more components of same such as the above described tangibly stored software, hardware, firmware and DP, modem, system on a chip SOC or an application specific integrated circuit ASIC.
  • the various embodiments of the UE 20 can include, but are not limited to personal portable digital devices having wireless communication capabilities, including but not limited to cellular telephones, navigation devices, laptop/palmtop/tablet computers, digital cameras and Internet appliances.
  • Various embodiments of the computer readable MEMs 20B and 22B include any data storage technology type which is suitable to the local technical environment, including but not limited to semiconductor based memory devices, magnetic memory devices and systems, optical memory devices and systems, fixed memory, removable memory, disc memory, flash memory, DRAM, SRAM, EEPROM and the like.
  • Various embodiments of the DPs 20A and 22A include but are not limited to general purpose computers, special purpose computers, microprocessors, digital signal processors (DSPs) and multi-core processors.

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Abstract

Selon l'invention, une liste de mesures classées par ordre de priorité est stockée dans une mémoire (202), chaque élément de la liste de mesures classées par ordre de priorité définissant une combinaison unique d'une couche de fréquence et d'une technologie d'accès radio (RAT) pour une cellule de desserte et pour des cellules voisines. Sur la base au moins d'une intensité de signal de la cellule de desserte, un ensemble d'éléments pour une mesure est sélectionné dans une liste de voisines conformément à la liste de mesures classées par ordre de priorité selon une règle de sélection (204). La règle de sélection assure que (206) : pour le cas dans lequel l'intensité de signal de la cellule de desserte est relativement élevée, l'ensemble sélectionné est un premier ensemble et représente des mesures de plus haute priorité de la liste de mesures classées par ordre de priorité ; et pour le cas dans lequel l'intensité de signal de la cellule de desserte est relativement faible, l'ensemble sélectionné est un second ensemble et représente des mesures de plus basse priorité de la liste de mesures classées par ordre de priorité.
PCT/IB2012/055310 2011-10-03 2012-10-03 Attribution de priorité à des technologies d'accès radio WO2013050949A1 (fr)

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Application Number Priority Date Filing Date Title
CN201280048574.5A CN103843411A (zh) 2011-10-03 2012-10-03 优先级排序无线接入技术
DE112012004118.6T DE112012004118T5 (de) 2011-10-03 2012-10-03 Priorisierung von Funkzugangstechnologien

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
US13/251,363 US20130084850A1 (en) 2011-10-03 2011-10-03 Prioritizing Radio Access Technologies For Measurement
GB1116979.4A GB2492183B (en) 2011-10-03 2011-10-03 Prioritizing radio access technologies
US13/251,363 2011-10-03
GB1116979.4 2011-10-03
US13/524,251 2012-06-15
US13/524,251 US8543117B2 (en) 2011-10-03 2012-06-15 Prioritizing radio access technologies

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WO2016028319A1 (fr) * 2014-08-21 2016-02-25 Qualcomm Incorporated Planification de mesure à fréquences multiples pour resélection de cellules
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