WO2014188330A1 - Prévention des interruptions lors d'opérations de cellule active - Google Patents

Prévention des interruptions lors d'opérations de cellule active Download PDF

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Publication number
WO2014188330A1
WO2014188330A1 PCT/IB2014/061546 IB2014061546W WO2014188330A1 WO 2014188330 A1 WO2014188330 A1 WO 2014188330A1 IB 2014061546 W IB2014061546 W IB 2014061546W WO 2014188330 A1 WO2014188330 A1 WO 2014188330A1
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WO
WIPO (PCT)
Prior art keywords
measurements
user equipment
interrupts
cell
active cell
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PCT/IB2014/061546
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English (en)
Inventor
Lars Dalsgaard
Jorma Kaikkonen
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Nokia Corporation
Nokia Usa, Inc.
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Publication date
Application filed by Nokia Corporation, Nokia Usa, Inc. filed Critical Nokia Corporation
Publication of WO2014188330A1 publication Critical patent/WO2014188330A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0261—Power saving arrangements in terminal devices managing power supply demand, e.g. depending on battery level
    • H04W52/0274—Power saving arrangements in terminal devices managing power supply demand, e.g. depending on battery level by switching on or off the equipment or parts thereof
    • H04W52/028—Power saving arrangements in terminal devices managing power supply demand, e.g. depending on battery level by switching on or off the equipment or parts thereof switching on or off only a part of the equipment circuit blocks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H04W36/0085—Hand-off measurements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/22—Processing or transfer of terminal data, e.g. status or physical capabilities
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H04W36/0085—Hand-off measurements
    • H04W36/0088—Scheduling hand-off measurements
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the exemplary and non-limiting embodiments relate generally to wireless communication and, more particularly, to preventing interrupts on active cell operation.
  • eNB eNodeB evolved node B/base station in an E-UTRAN system
  • E-PDCCH enhanced physical downlink control channel
  • LTE evolved universal terrestrial radio access network
  • CA Carrier Aggregation
  • UL uplink
  • DL downlink
  • CC component carrier
  • the component carrier can have a bandwidth of 1.4, 3, 5, 10, 15 or 20 MHz and a maximum of five component carriers can be aggregated, hence the maximum aggregated bandwidth is 100 MHz.
  • serving cells there are a number of serving cells, one for each component carrier. The coverage of the serving cells may differ.
  • the RRC connection is only handled by one cell, the primary serving cell (PCell), served by the primary component carrier (PCC, e.g., DL and UL PCCs).
  • PCell primary serving cell
  • PCC primary component carrier
  • the UE listens to system information on the DL PCC.
  • PUCCH On the UL PCC, PUCCH is sent.
  • the other component carriers are all referred to as secondary component carriers (DL and UL SCCs), serving the secondary serving cells (SCells).
  • SCCs are added and removed as required, while the PCC is only changed at handover.
  • a UE By mean of cross carrier scheduling, users can be dynamically scheduled on the different component carriers.
  • a new information element was added to the downlink control information that is called Carrier Indicator Field (CIF).
  • CIF Carrier Indicator Field
  • Release 11 CA also supports inter -band Carrier Aggregation where the component carriers are located in different frequency bands. This should prove to be very beneficial for operators having LTE frequencies in different bands.
  • LTE in general supports a synchronized uplink by means of the uplink Timing Advance (TA) procedure.
  • TA Timing Advance
  • 3GPP TS 36.331 vl l.3.0 (2013-03) and 3GPP TS 36.133 VI 1.4.0 (2013-03) describe various 3GPP specifications.
  • R4-131235 "Considerations for single-chip implementation of carrier aggregation" Qualcomm Incorporated from 3GPP TSG-RAN WG4 Meeting #66 Bis, Chicago, U.S. A, 15th April - 19th April, 2013, it is discussed how the initial chipset implementations for inter- band and non-contiguous intra-band carrier aggregation most likely will be based on separate integrated circuit chips for each radio chain.
  • the paper also raises the potential of creating solutions based on single-chip, which may have the opportunity to reduce some key parameters such as cost, area and power consumption.
  • the tighter integration also comes with some problems, which are discussed in:
  • a method comprises: determining whether an apparatus can perform measurements without causing interrupts on an active cell; and in response to the determining making a determination that the apparatus cannot perform inter-frequency measurements without causing interrupts on the active cell, preventing the apparatus from indicating that the apparatus can perform measurements without gap assistance.
  • An exemplary apparatus includes one or more processors and one or more memories including computer program code.
  • the one or more memories and the computer program code are configured to, with the one or more processors, cause the apparatus to perform at least the following: determining whether an apparatus can perform measurements without causing interrupts on an active cell; and in response to the determining making a determination that the apparatus cannot perform inter-frequency measurements without causing interrupts on the active cell, preventing the apparatus from indicating that the apparatus can perform measurements without gap assistance.
  • An additional exemplary embodiment includes a computer program, comprising code for determining whether an apparatus can perform measurements without causing interrupts on an active cell; and in response to the determining making a determination that the apparatus cannot perform inter-frequency measurements without causing interrupts on the active cell, preventing the apparatus from indicating that the apparatus can perform measurements without gap assistance; when the computer program is run on a processor.
  • An exemplary computer program product includes a computer-readable storage medium bearing computer program code embodied therein for use with a computer.
  • the computer program code includes: code for determining whether an apparatus can perform measurements without causing interrupts on an active cell; and code for, in response to the determining making a determination that the apparatus cannot perform inter-frequency measurements without causing interrupts on the active cell, preventing the apparatus from indicating that the apparatus can perform measurements without gap assistance.
  • a further exemplary embodiment is an apparatus comprising: means for determining whether an apparatus can perform measurements without causing interrupts on an active cell; and means, responsive to the determining making a determination that the apparatus cannot perform inter- frequency measurements without causing interrupts on the active cell, for preventing the apparatus from indicating that the apparatus can perform measurements without gap assistance.
  • a method comprises: determining at a base station whether an indication that a user equipment can perform measurements without gaps or interrupts has been received; and in response to a determination the indication that the user equipment can perform measurements without gaps or interrupts has not been received, determining at the base station a gap pattern for the user equipment and sending from the base station an indication of the gap pattern to the user equipment, wherein the gap pattern indicates to the user equipment a schedule under which the user equipment is to the perform measurements.
  • An exemplary apparatus includes one or more processors and one or more memories including computer program code.
  • the one or more memories and the computer program code are configured to, with the one or more processors, cause the apparatus to perform at least the following: determining at a base station whether an indication that a user equipment can perform measurements without gaps or interrupts has been received; and in response to a determination the indication that the user equipment can perform measurements without gaps or interrupts has not been received, determining at the base station a gap pattern for the user equipment and sending from the base station an indication of the gap pattern to the user equipment, wherein the gap pattern indicates to the user equipment a schedule under which the user equipment is to the perform measurements.
  • An additional exemplary embodiment includes a computer program, comprising code for: determining at a base station whether an indication that a user equipment can perform measurements without gaps or interrupts has been received; and in response to a determination the indication that the user equipment can perform measurements without gaps or interrupts has not been received, determining at the base station a gap pattern for the user equipment and sending from the base station an indication of the gap pattern to the user equipment, wherein the gap pattern indicates to the user equipment a schedule under which the user equipment is to the perform measurements; when the computer program is run on a processor.
  • the computer program according to this paragraph, wherein the computer program is a computer program product comprising a computer- readable medium bearing computer program code embodied therein for use with a computer.
  • An exemplary computer program product includes a computer-readable storage medium bearing computer program code embodied therein for use with a computer.
  • the computer program code includes: code for determining at a base station whether an indication that a user equipment can perform measurements without gaps or interrupts has been received; and code for, in response to a determination the indication that the user equipment can perform measurements without gaps or interrupts has not been received, determining at the base station a gap pattern for the user equipment and sending from the base station an indication of the gap pattern to the user equipment, wherein the gap pattern indicates to the user equipment a schedule under which the user equipment is to the perform measurements.
  • An additional exemplary embodiment is an apparatus, comprising: means for determining at a base station whether an indication that a user equipment can perform measurements without gaps or interrupts has been received; and means, responsive to a determination the indication that the user equipment can perform measurements without gaps or interrupts has not been received, for determining at the base station a gap pattern for the user equipment and sending from the base station an indication of the gap pattern to the user equipment, wherein the gap pattern indicates to the user equipment a schedule under which the user equipment is to the perform measurements.
  • FIG. 1 is a diagram of a system incorporating features of an example embodiment
  • FIG. 2 illustrates a simplified block diagram of various electronic devices and apparatus that are suitable for use in practicing the exemplary embodiments of this invention
  • FIG. 3 is performed by a user equipment for preventing interrupts on active cell operation and is a block diagram of an exemplary logic flow diagram that illustrates the operation of an exemplary method, a result of execution of computer program instructions embodied on a computer readable memory, and/or functions performed by logic implemented in hardware, in accordance with exemplary embodiments herein; and
  • FIG. 4 is performed by a base station for preventing interrupts on active cell operation and is a block diagram of an exemplary logic flow diagram that illustrates the operation of an exemplary method, a result of execution of computer program instructions embodied on a computer readable memory, and/or functions performed by logic implemented in hardware, in accordance with exemplary embodiments herein.
  • the system 1 comprises at least one user equipment (UE) 10 which is able to connect to a primary cell (PCell) 110 (formed by a first base station 14-1 using antenna(s) 100-1, shown in FIG. 2 as eNodeB 14) and a secondary cell (SCell) 120 (formed by a second base station 14-2 using antenna(s) 100-2).
  • PCell primary cell
  • SCell secondary cell
  • a wireless network 1 is adapted for communication over a wireless link 11 with apparatus, such as a mobile communication device which may be referred to as a UE 10, via a network access node, such as an eNodeB 14 for the case of an LTE or LTE-A network.
  • apparatus such as a mobile communication device which may be referred to as a UE 10
  • a network access node such as an eNodeB 14 for the case of an LTE or LTE-A network.
  • eNodeB 14 for the case of an LTE or LTE-A network.
  • the wireless network 1 may include a network control element (NCE) 16 that may implement mobility management entity (MME) and/or serving gateway (S-GW) functionality such as that known in the LTE system, and which provides connectivity with a further network, such as a publicly switched telephone network and/or a data communications network (e.g., the Internet).
  • NCE network control element
  • MME mobility management entity
  • S-GW serving gateway
  • the UE 10 includes a controller, such as a computer or a data processor (DP) 10A, a computer-readable memory (MEM) 10B that tangibly stores a program of computer instructions (PROG) IOC, and at least one suitable radio frequency (RF) transmitter and receiver (shown together as 10D) for bidirectional wireless communications with the eNodeB 14 via one or more antennas 10E (one shown).
  • the UE 10 may also have functionality to demodulate the control channel or distributed control channel/PDCCH or E-PDCCH that it receives over the wireless link 11.
  • the eNodeB 14 also includes a controller, such as a computer or a data processor (DP) 14A, a computer-readable memory (MEM) 14B that tangibly stores a program of computer instructions (PROG) 14C, and at least one suitable RF transmitter and receiver (shown together as 14D) for communication with the UE 10 via one or more antennas 14E (two shown, but as with the above examples there may also be four or even an antenna array of more than four).
  • the eNodeB 14 is additionally coupled via a data/control path 13 to the NCE 16.
  • the NCE 16 also includes a controller, such as a computer or a data processor (DP) 16A and a computer-readable memory (MEM) 16B that stores a program of computer instructions (PROG) 16C.
  • the NCE 16 may be connected to additional networks such as the Internet.
  • the path 13 may be implemented as the SI interface known for the LTE system.
  • the eNodeB 14 may also be coupled to another eNodeB (or Node B) via data/control path 15, which may be implemented as the X2 interface known in the LTE system.
  • the techniques herein may be considered as being implemented solely as computer program code embodied in a memory resident within the UE 10 or eNodeB 14 (e.g., as PROG IOC or 14C, respectively), or as a combination of embodied computer program code (executed by one or more processors) and various hardware, including memory locations, data processors, buffers, interfaces and the like, or entirely in hardware (such as in a very large scale integrated circuit).
  • transmitters and receivers 10D and 14D may also be implemented using any type of wireless communications interface suitable to the local technical environment, for example, they may be implemented using individual transmitters, receivers, transceivers or a combination of such components.
  • the various embodiments of the UE 10 can include, but are not limited to, cellular telephones, personal digital assistants (PDAs) having wireless communication capabilities, portable computers having wireless communication capabilities, image capture devices such as digital cameras having wireless communication capabilities, gaming devices having wireless communication capabilities, music storage and playback appliances having wireless communication capabilities, Internet appliances permitting wireless Internet access and browsing, as well as portable units or terminals that incorporate combinations of such functions.
  • PDAs personal digital assistants
  • portable computers having wireless communication capabilities
  • image capture devices such as digital cameras having wireless communication capabilities
  • gaming devices having wireless communication capabilities
  • music storage and playback appliances having wireless communication capabilities
  • Internet appliances permitting wireless Internet access and browsing, as well as portable units or terminals that incorporate combinations of such functions.
  • the computer readable MEMs 10B and 14B may be of any type suitable to the local technical environment and may be implemented using any suitable data storage technology, such as semiconductor based memory devices, flash memory, magnetic memory devices and systems, optical memory devices and systems, fixed memory and removable memory.
  • the DPs 10A and 14A may be of any type suitable to the local technical environment, and may include one or more of general purpose computers, special purpose computers, microprocessors, digital signal processors (DSPs) and processors based on a multi-core processor architecture, as non-limiting examples.
  • Transceiver lOD-1 comprises a transmitter lOF-1 and receiver lOG-1.
  • Transceiver 10D-2 comprises a transmitter 10F-2 and receiver 10G-2.
  • the transceiver lOD-1 may be on one semiconductor chip lOH-1, and the transceiver 10D-2 may be on another semiconductor chip 10H-2. Furthermore, both transceivers lOD-1 and 10D-2 may be on the same semiconductor chip 10H-3.
  • An exemplary case under discussion is caused by a certain UE implementation solution used for implementing CA and likely also future dual connectivity (DC) UEs.
  • a problem is when the UE initiates second receiver activity (such as using receiver 10G-2) while the first receiver lOG-1 is active.
  • This second receiver 10G-2 activity start causes interference on the already active first receiver lOG-1.
  • This interference is also referred to as an interrupt, as described below.
  • This change in second receiver 10G-2 activity can be caused, e.g., by performing measurements using the second receiver 10G-2.
  • the change can be caused by the UE 10, e.g., performing inter-frequency measurements using the second receiver 10G-2 or the change can be caused by UE performing measurements on a configured but deactivated SCell, e.g., according to ScellMeasCycle or measCycleSCell.
  • the change can also happen, e.g., due to
  • Interference or interrupt on PCell means that the reception and likely also the transmission on the active receiver chain (the first receiver lOG-1, which is assigned to PCell in this example) is interrupted for given period of time due to the change in the state of the second receiver 10G-2, as described above.
  • This interrupt means that the UE 110 is not able to receive or transmit during the interrupt period (or at least reception/transmission is corrupted due to interference/interrupt for a part of the TTI).
  • the interrupt period is currently understood to be short but means that the UE will not be able to receive the TTI/PDCCH during that time (in that TTI) and the UE 110 cannot transmit in UL in that TTI either (or at least in part of the TTI that results in corrupting the reception/transmission in that TTI). That is, an interrupt is a drop of a DL reception and an UL transmission between UE and network.
  • Inter-frequency Measurement such as when a UE performs normal inter- frequency measurements on a carrier before a potential cell on that carrier is configured as SCell.
  • a feature as described herein is that, for a UE which cannot perform inter-frequency measurements without causing interrupts on active cells (e.g., PCell), the UE is not allowed to indicate that the UE can perform inter-frequency measurements without measurement gaps.
  • a measurement gap has a particular length, e.g., of 6ms (e.g., long enough for UE to perform re-tuning and perform physical measurements on another carrier or carriers), while an interrupt is currently understood to be about 1ms (and is caused by, e.g., a second receiver 10G-2 state change).
  • the measurement gaps for example, may be existing gap patterns as defined, or a new gap pattern, or a gap type.
  • a gap pattern consists of a measurement gap (6ms), where the UE tunes its receiver to another carrier to perform measurements, repeated with a periodicity which is either 40ms or 80ms for these two patterns. This is configured by the network, e.g., via the eNodeB 14. See, e.g., 3GPP TS 36.133 VI 1.4.0 (2013-03) section 8.1.2.1, which states the following:
  • Inter-frequency and inter-RAT measurement requirements within this clause rely on the UE being configured with one measurement gap pattern unless the UE has signaled that it is capable of conducting such measurements without gaps. UEs shall only support those measurement gap patterns listed in Table 8.1.2.1-1 that are relevant to its measurement capabilities.”
  • the network will recognize the UE cannot or should not perform inter-frequency measurement without gaps and the network may assign measurement gaps (a measurement gap pattern) to the UE. If the UE indicates that the UE does need measurement gaps for inter-frequency measurements, the network needs to assign a gap pattern to the UE and activate the gap pattern before the UE is required to perform inter-frequency measurements.
  • measurement gaps a measurement gap pattern
  • RAN2 and/or RAN4 specification may be realized in RAN2 and/or RAN4 specification, for example, by stating an additional condition that, if a start of SCell activity or activity on that carrier frequency (e.g., inter-frequency measurements) causes interruptions, the UE is not allowed to indicate that the UE can perform inter-frequency measurements without network assisted measurement gaps.
  • the SCell activity may be in the form of cell detection and/or measurements for example. Rather than SCell, or in addition to SCell, this may be applied to any inter-frequency carrier and /or inter- frequency neighbor cell.
  • a feature as described herein is that the UE would not indicate to the network that the UE has the capability of performing inter-frequency measurement without gaps (and would therefore need gap assistance, e.g., according to 36.331 and 36.133 or any other gap assistance).
  • Another option would be that, in case such a UE indicates the UE interrupts, the UE would then implicitly also indicate that the UE needs gap assistance for inter-frequency
  • the gap assistance may be in form of either existing gap patterns or new gap patterns or gap occurrences (e.g., single gaps).
  • An additional option is that a separate capability could be defined for UEs that can perform inter-frequency measurements without gaps, but that some level of interruptions to PCell reception would be allowed.
  • CA capable UEs which have an integrated CA solution (a single circuit chip for CA for example).
  • An example embodiment of an apparatus may comprise at least one processor; at least one memory comprising software, where the at least one processor, the at least one memory, and the software are configured to: prevent the apparatus from indicating that the apparatus can perform inter-frequency measurements without gaps when the apparatus cannot perform inter-frequency measurements without causing interrupts on an active cell.
  • An example embodiment of an apparatus may comprise at least one processor; at least one memory comprising software, where the at least one processor, the at least one memory, and the software are configured to: if a start of SCell activity by the apparatus causes interruptions, preventing the apparatus from indicating that the apparatus can perform inter-frequency measurements without network assisted measurement gaps.
  • An example embodiment of an apparatus may comprise: at least one processor; at least one memory comprising software, where the at least one processor, the at least one memory, and the software are configured to: not indicate to a network that the apparatus has a capability of performing inter-frequency measurement without gaps.
  • An example embodiment of an apparatus may comprise: at least one processor; at least one memory comprising software, where the at least one processor, the at least one memory, and the software are configured to: indicating that the apparatus cannot perform inter-frequency measurements without causing interrupts on an active cell, and only by the indicating that the apparatus cannot perform inter-frequency measurements without causing interrupts on an active cell, implicitly indicate that the apparatus needs gap assistance for inter-frequency measurements.
  • an example method may comprise determining whether an apparatus can perform inter-frequency measurements (e.g., of a secondary cell) without causing interrupts on an active cell (e.g., a primary cell) as indicated by block 20; and in response to the determining indicating that the apparatus cannot perform (e.g., inter-frequency) measurements without causing interrupts on an active cell, preventing the apparatus from indicating to the network that the apparatus can perform (e.g., inter-frequency) measurements without gap assistance as indicated by block 22.
  • Examples of preventing the apparatus from indicating to the network that the apparatus can perform measurements without gap assistance may include preventing the apparatus from indicating to the network that the apparatus can perform measurements without measurement gaps or without interrupts.
  • the interrupts are interrupts in UL transmission (e.g., on transmitter lOF-1) or DL reception (e.g., on receiver lOG-1) based on reception by receiver 10G-2.
  • How the UE determines when the apparatus cannot perform inter-frequency measurements without causing interrupts may be basically a UE specific design issue (see block 24) and may depend on what the CA combination is and also how the spurious transmissions from the VCO are.
  • the determination can also come from power pulling, in the sense that when the new activity is initiated, the new activity may lead to a change in drain on the PLL/VCO which may then affect the phase which takes some time to settle.
  • the measurements are typically inter-frequency measurements of SCells, but are not limited to these and may, e.g., but inter-frequency measurements of carriers or possibly intra-frequency measurements.
  • blocks 26 and 28 Examples of block 22 are illustrated by blocks 26 and 28.
  • a start of a cell activity e.g., by transmitter 10F-2/receiver 10G-2 for SCell or another cell different from the active cell
  • the apparatus performs preventing the apparatus from indicating that the apparatus can perform inter-frequency measurements without network assisted measurement gaps.
  • the measurement gaps can include existing defined measurement gaps, but are not limited thereto and may be newly defined measurement gaps.
  • the apparatus performs the operation of not indicating to the network that the apparatus has a capability of performing inter-frequency measurement without measurement gaps
  • the apparatus optionally performs indicating to a network that the apparatus cannot perform (e.g., inter-frequency) measurements without causing interrupts on an active cell.
  • An example of block 30 is illustrated by block 32, where, by the indicating that the apparatus cannot perform inter-frequency measurements without causing interrupts on an active cell, implicitly indicate that the apparatus needs gap assistance (e.g., existing gap patterns or newly defined gap patterns) for inter-frequency measurements. That is, if the apparatus indicates to a base station that the apparatus cannot perform inter-frequency measurements without causing interrupts on an active cell, this indication implies to the base station that the apparatus needs gap assistance for inter- frequency measurements.
  • gap assistance e.g., existing gap patterns or newly defined gap patterns
  • Block 34 where the apparatus performs receiving indication of a gap pattern from base station, may be performed in multiple locations as shown.
  • the base station may, upon determining there is no indication the apparatus can perform inter-frequency measurements without gaps, send the indication of a gap pattern prior to block 30.
  • the base station after the base station receives the indication responsive to block 30, the base station would send and the apparatus would receive in block 34 the indication of gap pattern.
  • the apparatus performs using the gap pattern to perform (e.g., inter- frequency) measurements on secondary cell(s).
  • the apparatus performs reporting the (e.g., inter-frequency) measurements on the secondary cell(s) to the active cell (e.g., the base station forming the active cell). It is noted that the reporting may not be to the active cells and could be to other entities in the network, such as to the secondary cells.
  • FIG. 4 this figure is performed by a base station (e.g., eNodeB 14) for preventing interrupts on active cell operation.
  • a base station e.g., eNodeB 14
  • This figure is also a block diagram of an exemplary logic flow diagram that illustrates the operation of an exemplary method, a result of execution of computer program instructions embodied on a computer readable memory, and/or functions performed by logic implemented in hardware, in accordance with exemplary embodiments herein.
  • the base station performs activating the gap pattern, e.g., through RRC signaling. It is noted that blocks 64 and 66 could be combined and need not be independent operations.
  • the flow proceeds to block 76, which is described below.
  • the base station performs (block 74) blocks 62, 64, and 66 to determine a gap pattern for the UE, send the gap pattern to the UE and activate the gap pattern. It is noted that activating the gap pattern (in block 62) is an optional step.
  • the determined gap pattern is not limited to existing patterns in current specifications. Instead (or in addition to existing patterns), the options listed earlier in the description are also possible and the gap pattern could even be a new, previously unused gap pattern.
  • Example 1 A method comprising: determining whether an apparatus can perform measurements without causing interrupts on an active cell; and in response to the determining making a determination that the apparatus cannot perform inter-frequency measurements without causing interrupts on the active cell, preventing the apparatus from indicating that the apparatus can perform measurements without gap assistance.
  • Example 2. The method of example 1, wherein preventing further comprises, if a start of a cell activity by the apparatus causes interruptions on the active cell, where the cell activity is for a cell different from the active cell, preventing the apparatus from indicating that the apparatus can perform measurements without network-assisted measurement gaps.
  • Example 3. The method of example 1, wherein preventing further comprises not indicating to a network that the apparatus has a capability of performing measurement without measurement gaps.
  • Example 4 The method of any of examples 1 to 3, wherein the method further comprises indicating to a network that the apparatus cannot perform measurements without causing interrupts on an active cell, whereby by the indicating that the apparatus cannot perform
  • Example 5 The method of any of examples 1 to 4, further comprising: receiving an indication of a gap pattern; using the gap pattern to perform measurements on a secondary cell; and reporting indications of the measurements.
  • Example 6 The method of any of examples 1 to 5, wherein the active cell is a primary cell used for carrier aggregation and the measurements are to be or are performed on a secondary cell used for the carrier aggregation.
  • Example 7 The method of example 6, wherein the interrupts are interrupts of at least one of uplink or downlink communications between the apparatus and the active cell and the interrupts are caused by a receiver performing the measurements of the secondary cell.
  • Example 8 The method of any of examples 1 to 7, wherein the measurements are inter-frequency measurements.
  • An apparatus comprising: means for determining whether an apparatus can perform measurements without causing interrupts on an active cell; and means, responsive to the determining making a determination that the apparatus cannot perform inter-frequency measurements without causing interrupts on the active cell, for preventing the apparatus from indicating that the apparatus can perform measurements without gap assistance.
  • Example 10 The apparatus of example 9, wherein the means for preventing further comprises means, if a start of a cell activity by the apparatus causes interruptions on the active cell, where the cell activity is for a cell different from the active cell, for preventing the apparatus from indicating that the apparatus can perform measurements without network-assisted measurement gaps.
  • Example 11 The apparatus of example 9, wherein the means for preventing further comprises means for not indicating to a network that the apparatus has a capability of performing measurement without measurement gaps.
  • Example 12 The apparatus of any of examples 9 to 11, further comprising means for indicating to a network that the apparatus cannot perform measurements without causing interrupts on an active cell, whereby by the indicating that the apparatus cannot perform measurements without causing interrupts on an active cell, this implicitly indicates that the apparatus needs gap assistance for measurements.
  • Example 13 The apparatus of any of examples 9 to 12, further comprising: means for receiving an indication of a gap pattern; means for using the gap pattern to perform measurements on a secondary cell; and means for reporting indications of the measurements.
  • Example 14 The apparatus of any of examples 9 to 13, wherein the active cell is a primary cell used for carrier aggregation and the measurements are to be or are performed on a secondary cell used for the carrier aggregation.
  • Example 15 The apparatus of example 14, wherein the interrupts are interrupts of at least one of uplink or downlink communications between the apparatus and the active cell and the interrupts are caused by a receiver performing the measurements of the secondary cell.
  • Example 16 The apparatus of any of examples 9 to 15, wherein the measurements are inter-frequency measurements.
  • Example 17 A user equipment comprising the apparatus of any of examples 9 to 16.
  • Example 18 A method, comprising: determining at a base station whether an indication that a user equipment can perform measurements without gaps or interrupts has been received; and in response to a determination the indication that the user equipment can perform measurements without gaps or interrupts has not been received, determining at the base station a gap pattern for the user equipment and sending from the base station an indication of the gap pattern to the user equipment, wherein the gap pattern indicates to the user equipment a schedule under which the user equipment is to the perform measurements.
  • Example 19 The method of example 18, further comprising activating the gap pattern.
  • Example 20 The method of any of examples 18 or 19, wherein determining a gap pattern for the user equipment is performed further in response to not receiving the indication.
  • Example 21 The method of any of examples 18 to 20, further comprising receiving measurements from the user equipment.
  • Example 22 The method of any of examples 18 to 21, wherein the base station forms an active cell, the active cell is a primary cell used for carrier aggregation by the user equipment, and the measurements were performed by the user equipment on a secondary cell used for the carrier aggregation.
  • Example 23 The method of example 22, wherein the interrupts are interrupts at the user equipment of at least one of uplink or downlink communications between the user equipment and the active cell and the interrupts are caused by a receiver at the user equipment performing the measurements of the secondary cell.
  • Example 24 The method of any of examples 18 to 23, wherein the measurements are inter-frequency measurements.
  • Example 25 An apparatus, comprising: means for determining at a base station whether an indication that a user equipment can perform measurements without gaps or interrupts has been received; and means, responsive to a determination the indication that the user equipment can perform measurements without gaps or interrupts has not been received, for determining at the base station a gap pattern for the user equipment and sending from the base station an indication of the gap pattern to the user equipment, wherein the gap pattern indicates to the user equipment a schedule under which the user equipment is to the perform measurements.
  • Example 26 The apparatus of example 25, further comprising means for activating the gap pattern.
  • Example 27 The apparatus of any of examples 25 or 26, wherein the determining a gap pattern for the user equipment is performed further in response to not receiving the indication.
  • Example 28 The apparatus of any of examples 25 to 27, further comprising means for receiving measurements from the user equipment.
  • Example 29 The apparatus of any of examples 25 to 28, wherein the base station forms an active cell, the active cell is a primary cell used for carrier aggregation by the user equipment, and the measurements were performed by the user equipment on a secondary cell used for the carrier aggregation.
  • Example 30 The apparatus of example 29, wherein the interrupts are interrupts at the user equipment of at least one of uplink or downlink communications between the user equipment and the active cell and the interrupts are caused by a receiver at the user equipment performing the measurements of the secondary cell.
  • Example 31 The apparatus of any of examples 25 to 30, wherein the measurements are inter-frequency measurements.
  • Example 32 A base station comprising the apparatus of any of examples 25 to 31.
  • Example 33 A system comprising an apparatus of any of examples 9 to 16 and an apparatus of any of examples 25 to 31.
  • Example 34 A computer program comprising program code for executing the apparatus according to any of examples 1 to 8 or 18 to 24.
  • Example 35 The computer program according to example 34, wherein the computer program is a computer program product comprising a computer-readable medium bearing computer program code embodied therein for use with a computer.
  • Example 36 An apparatus comprises one or more processors and one or more memories including computer program code. The one or more memories and the computer program code are configured to, with the one or more processors, cause the apparatus to perform the method according to any of examples 1 to 8 or 18 to 24.
  • Embodiments of the present invention may be implemented in software (executed by one or more processors), hardware (e.g., an application specific integrated circuit), or a combination of software and hardware.
  • the software e.g., application logic, an instruction set
  • a "computer-readable medium” may be any media or means that can contain, store, communicate, propagate or transport the instructions for use by or in connection with an instruction execution system, apparatus, or device, such as a computer, with one example of a computer described and depicted, e.g., in FIG. 2.
  • a computer-readable medium may comprise a computer-readable storage medium (e.g., memory(ies) 10B, 14B or other device) that may be any media or means that can contain or store the instructions for use by or in connection with an instruction execution system, apparatus, or device, such as a computer.
  • a computer readable storage medium does not, however, encompass propagating signals.
  • the different functions discussed herein may be performed in a different order and/or concurrently with each other. Furthermore, if desired, one or more of the above- described functions may be optional or may be combined.

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

Abstract

L'invention concerne la détermination pour savoir si un appareil peut réaliser des mesures sans provoquer d'interruptions sur une cellule active. En réponse à une détermination selon laquelle l'appareil ne peut pas réaliser de mesures inter-fréquence sans provoquer d'interruptions sur la cellule active, l'appareil ne peut pas indiquer que l'appareil peut réaliser des mesures sans assistance d'interstice. On détermine, au niveau d'une station de base, si oui ou non une indication qu'un équipement utilisateur peut réaliser des mesures sans interstices ni interruptions a été reçue. En réponse à la détermination que l'indication que l'équipement utilisateur peut réaliser des mesures sans interstices ni interruptions n'a pas été reçue, la station de base détermine un modèle d'interstice pour l'équipement utilisateur et envoie une indication du modèle d'interstice à l'équipement utilisateur, le modèle d'interstice indiquant à l'équipement utilisateur un programme conformément auquel l'équipement utilisateur doit réaliser les mesures. L'invention concerne également des procédés, un appareil, des programmes informatiques et des produits programmes.
PCT/IB2014/061546 2013-05-20 2014-05-19 Prévention des interruptions lors d'opérations de cellule active WO2014188330A1 (fr)

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Cited By (9)

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Publication number Priority date Publication date Assignee Title
EP3001725A1 (fr) * 2014-09-26 2016-03-30 Nokia Technologies Oy État de cellule secondaire activation et désactivation d'intervalles
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CN110603838A (zh) * 2017-05-04 2019-12-20 诺基亚技术有限公司 用于带宽受限/覆盖增强的用户设备的无间隙测量
EP4080963A4 (fr) * 2020-01-16 2023-06-28 Huawei Technologies Co., Ltd. Procédé de réalisation d'une transmission et d'une réception de signal dans un intervalle de mesures, dispositif d'élément de réseau et support de stockage lisible
CN113300802A (zh) * 2020-02-21 2021-08-24 中国移动通信有限公司研究院 传输方法及设备
CN113300802B (zh) * 2020-02-21 2022-10-04 中国移动通信有限公司研究院 传输方法及设备
WO2021213377A1 (fr) * 2020-04-20 2021-10-28 华为技术有限公司 Procédé et appareil de configuration de mesures

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