WO2019095323A1 - Radiomessagerie - Google Patents

Radiomessagerie Download PDF

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Publication number
WO2019095323A1
WO2019095323A1 PCT/CN2017/111740 CN2017111740W WO2019095323A1 WO 2019095323 A1 WO2019095323 A1 WO 2019095323A1 CN 2017111740 W CN2017111740 W CN 2017111740W WO 2019095323 A1 WO2019095323 A1 WO 2019095323A1
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WO
WIPO (PCT)
Prior art keywords
wake
signal
paging
group
ues
Prior art date
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PCT/CN2017/111740
Other languages
English (en)
Inventor
David Bhatoolaul
Nitin MANGALVEDHE
Rapeepat Ratasuk
Chunhai Yao
Matthew Baker
Original Assignee
Nokia Shanghai Bell Co., Ltd.
Nokia Solutions And Networks Oy
Nokia Technologies Oy
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.)
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Application filed by Nokia Shanghai Bell Co., Ltd., Nokia Solutions And Networks Oy, Nokia Technologies Oy filed Critical Nokia Shanghai Bell Co., Ltd.
Priority to CN201780096996.2A priority Critical patent/CN111373806B/zh
Priority to PCT/CN2017/111740 priority patent/WO2019095323A1/fr
Publication of WO2019095323A1 publication Critical patent/WO2019095323A1/fr

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    • 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
    • H04W52/0212—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave
    • H04W52/0216—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave using a pre-established activity schedule, e.g. traffic indication frame
    • 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
    • H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
    • H04W52/0229—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal where the received signal is a wanted signal
    • 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
    • H04W68/00—User notification, e.g. alerting and paging, for incoming communication, change of service or the like
    • H04W68/005—Transmission of information for alerting of incoming communication
    • 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

  • Examples described relate to paging. In particular, they relate to paging of user equipment in a cellular network.
  • Paging from a transmitter perspective, is a method of transmitting a paging signal from a transmitter to one or more receivers for reception by the one or more receivers.
  • Paging, from a receiver perspective is a method of receiving a paging signal transmitted from a transmitter to one or more receivers for reception by the one or more receivers.
  • paging is performed via a downlink channel transmitted by a base station over the whole of the cell it serves.
  • an apparatus comprising:
  • At least one memory including computer program code
  • the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus at least to perform:
  • UE user equipment
  • the wake-up paging process includes transmission of a wake-up signal and subsequent transmission of a paging signal
  • performing the wake-up paging process for at least a group of the UEs by transmitting a wake-up signal and subsequently transmitting a paging signal in accordance with the characteristics of the wake-up paging process previously defined for the group.
  • UE user equipment
  • the wake-up paging process includes transmission of a wake-up signal and subsequent transmission of a paging signal
  • performing the wake-up paging process for at least a group of the UEs by transmitting a wake-up signal and subsequently transmitting a paging signal in accordance with the characteristics of the wake-up paging process previously defined for the group.
  • an apparatus comprising:
  • UE user equipment
  • UE user equipment
  • the wake-up paging process includes transmission of a wake-up signal and subsequent transmission of a paging signal
  • performing the wake-up paging process for at least a group of the UEs by transmitting a wake-up signal and subsequently transmitting a paging signal in accordance with the characteristics of the wake-up paging process previously defined for the group.
  • an apparatus comprising:
  • At least one memory including computer program code
  • the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus at least to perform:
  • identifying a group associated with some but not all of a plurality of user equipment in a cell including being associated with the apparatus, wherein a multiplicity of user equipment within the group share, to the exclusion of other groups, one or more, but not all, of multiple coverage levels of the cell;
  • a method for performance at a first user equipment comprising:
  • identifying a group associated with some but not all of a plurality of user equipment in a cell including being associated with the first user equipment, wherein a multiplicity of user equipment within the group share, to the exclusion of other groups, one or more, but not all, of multiple coverage levels of the cell;
  • an apparatus comprising:
  • a computer program that when run on a processor of a first user equipment, enables the first user equipment to cause:
  • identifying a group associated with some but not all of a plurality of user equipment in a cell including being associated with the first user equipment, wherein a multiplicity of user equipment within the group share, to the exclusion of other groups, one or more, but not all, of multiple coverage levels of the cell;
  • an apparatus comprising:
  • At least one memory including computer program code
  • the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus at least to perform:
  • an apparatus comprising
  • a computer program that when run on a processor of a first user equipment, enables the first user equipment to cause:
  • an apparatus comprising:
  • At least one memory including computer program code
  • the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus at least to perform:
  • each user equipment UE is caused to determine a coverage level of the user equipment based on the threshold.
  • an apparatus comprising:
  • At least one memory including computer program code
  • the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus at least to perform:
  • UE user equipment
  • an apparatus comprising:
  • the wake-up paging process includes transmission of a wake-up signal (WUS) and subsequent transmission of a paging signal;
  • a wake-up signal WUS
  • a paging signal in accordance with the characteristics of the wake-up paging process previously defined for the group.
  • Grouping the plurality of UEs in a cell into the multiplicity of groups is at least based on a physical layer parameter shared between the network node and the UEs, for example, to enable overlapping transmission by the network node and reception by the UE in the cell. Grouping the UEs into a multiplicity of groups is at least based on the respective coverage levels of the UEs.
  • Defining different characteristics of a wake-up paging process comprises defining different characteristics of a wake-up signal for each of at least one of the multiplicity of groups, wherein the wake-up signal is transmitted in advance of a paging signal;
  • the wake-up signal (WUS) is transmitted in accordance with the characteristics of the wake-up signal previously defined for the group.
  • Fig 1 illustrates an example of a network comprising a plurality of network nodes
  • Fig 2 illustrates an example of different modes and transitions between the modes
  • Fig 3 illustrates an example of a paging process (without a wake-up signal)
  • Fig 4 illustrates an example of a wake-up paging process (with a wake-up signal)
  • Fig 5A illustrates an example of a method for implementing the wake-up paging process, from a perspective of a network node
  • Fig 5B illustrates an example of a method for implementing the wake-up paging process, from a perspective of a UE
  • a UE may determine whether or not it operates in the paging mode with or without wake-up;
  • Fig 7 illustrates an example of a logical division of a set of UEs into wake-up groups
  • Fig 8A and 8B illustrate different examples of grouping UEs into groups
  • Fig 9 illustrates an example of signaling performed to support the wake-up paging process, and in particular coordination of the UEs and eNBs;
  • Fig 10 illustrates an example of signaling performed to support switching on and switching off the wake-up paging process
  • Fig 11A illustrates an example of a controller
  • Fig 11B illustrates an example of a computer program stored on a computer readable storage medium
  • Fig 12 illustrates an example, in which each of the network nodes may comprise a controller and one or more radio transceivers.
  • Fig 1 illustrates an example of a network 100 comprising a plurality of network nodes including terminal nodes 110, access nodes 120 and one or more core nodes 130.
  • the terminal nodes 110 and access nodes 120 communicate with each other.
  • the one or more core nodes 130 communicate with the access nodes 120.
  • the one or more core nodes 130 may, in some examples, communicate with each other.
  • the one or more access nodes 120 may, in some examples, communicate with each other.
  • the network 100 may be a cellular network comprising a plurality of cells 122 each served by an access node 120.
  • the interface between the terminal nodes 110 and an access node 120 defining a cell 122 is a wireless interface 124.
  • the access node 120 is a cellular radio transceiver.
  • the terminal nodes 110 are cellular radio transceivers.
  • the cellular network 100 is a third generation Partnership Project (3GPP) network in which the terminal nodes 110 are user equipment (UE) and the access nodes 120 are base stations.
  • 3GPP third generation Partnership Project
  • the network 100 is an Evolved Universal Terrestrial Radio Access network (E-UTRAN) .
  • the E-UTRAN consists of E-UTRAN NodeBs (eNBs) 120, providing the E-UTRA user plane and control plane (RRC) protocol terminations towards the UE 110.
  • the eNBs 120 are interconnected with each other by means of an X2 interface 126.
  • the eNBs are also connected by means of the S1 interface 128 to the Mobility Management Entity (MME) 130.
  • MME Mobility Management Entity
  • Fig 2 illustrates an example of different modes 130, 132 of a UE 110 and transitions 131, 133 between the modes 130, 132.
  • the connected mode 132 is a mode that enables communication between the UE 110 and the network 100 at higher layers, for example to enable the communication of application data or higher layer signaling.
  • Paging is used by the network 100 to trigger a transition 131 from the idle mode 130 to the connected mode.
  • a transition 133 from the connected mode 132 to the idle mode 130 may, for example, occur on release of the connection or radio link failure.
  • the UE 110 In the idle mode 130 the UE 110 only monitors some of the paging occasions (PO) within a subset of radio frames, the paging frames (PF) .
  • the MME 130 first sends a paging signal to the eNBs 120 within the tracking area. Each eNB 120 then transmits the paging signal within its cell 122 in the appropriate paging frame for that particular UE 110.
  • Each UE 110 which has been paged may establish a connection and transition from the idle mode 130 to the connected mode 132.
  • the idle mode 130 corresponds to RRC_IDLE and the connected mode corresponds to RRC_CONNECTED.
  • the transition 131 corresponds to RRC Connection Establishment.
  • the transition 133 corresponds to RRC Connection RELEASE (also Radio Link Failure) .
  • a UE 110 and a network node 120 are configured to perform paging 160 (without a wake-up signal) .
  • the paging 144 is in combination with discontinuous reception (DRX) in the idle mode 130.
  • the UE 110 wakes 142 (for paging) from a sleep state 140 once per DRX cycle to monitor 144 for a paging signal 145 transmitted by the eNB 120 at a paging occasion (PO) during a paging frame (PF) .
  • a UE configured with Extended DRX (eDRX) has a paging time window (PTW) , comprising several successive POs during which it monitors paging.
  • PGW paging time window
  • the UE 110 monitors its paging frame PF at its paging occasion PO for a paging signal 145. If the UE 110 is paged it may attempt to transition from the idle mode 130 to the connected mode 132.
  • the UE 110 If the UE 110 is not paged it returns 141 to the sleep state 140 and the DRX cycle repeats.
  • the UE 110 may perform other operations such as synchronization and radio resource management (RRM) measurements during the time that it is awake. Some of these operations (e.g., synchronization) may precede the PO whereas others (e.g., RRM measurements) may be performed either during the PO or after the PO but before the UE returns to sleep.
  • RRM radio resource management
  • the discontinuous reception of the downlink control channel used for paging saves battery lifetime.
  • the PFs and POs are determined from the DRX cycle, and the international mobile subscriber identity (IMSI) of the UE 110.
  • IMSI international mobile subscriber identity
  • the algorithm that determines the PFs and POs for a UE 110 depends on the IMSI of the UE.
  • a single paging occasion is shared by multiple UEs 110.
  • a UE 110 may have one (or more) POs per DRX cycle.
  • 3GPP TS36.304 version 14.4.0 section 7 describes the current paging process for the UTRAN network 100.
  • MTC machine type communications
  • IoT Internet of Things
  • a UE 110 may transmit to network 130 to enable the network to classify the UE 110 for latency requirements, data bandwidth requirements and mobility requirements.
  • a Physical Layer Enhancements for Machine Type Communications (eMTC) protocol may use a reduced bandwidth of 1.4MHz.
  • eMTC Machine Type Communications
  • a narrowband internet of things (NB-IoT) protocol uses a reduced bandwidth of 200kHz.
  • the expected mobility of a UE 110 performing the NB-IoT protocol is very low. For NB-IoT protocol there is no handover in the connected state 132.
  • UEs 110 can be operating at different coverage enhancement levels. This means, that in the same cell 122, different UEs 110 may be using the same logical channels but the characteristics (narrowband resources, repetitions, etc) of the corresponding physical channels can be very different between UEs 110 operating at different coverage enhancement levels.
  • the transmissions of channels can have the number of repetitions optimized to a given coverage enhancement level.
  • PDSCH Physical Downlink Shared Channel
  • PRACH Physical Random Access Channel
  • the coverage enhancement levels of a UE may be based on the configured coverage enhancement mode, measurements such as Reference Signal Received Power (RSRP) , number of required repetitions for a channel (e.g. for Physical Downlink Control Channel (PDCCH) for paging) , or selected PRACH configuration used for cell access.
  • RSRP Reference Signal Received Power
  • PDCCH Physical Downlink Control Channel
  • the grouping may also be based on the last reported or known coverage levels of the UEs.
  • the coverage enhancement level increases for worse coverage and coverage gets worse with increasing distance of a UE 110 from the serving eNB 120 or with increased signal attenuation, for example, due to obstacles in between.
  • the network 100 defines how many coverage enhancement levels are defined (e.g. based on the number of PRACH configurations or the number of repetitions needed for the control channel) .
  • the main impact of an increasing a coverage enhancement level is that messages to the UE 110 at a higher coverage enhancement level are repeated more times.
  • the coverage enhancement levels may be determined using thresholds for signal levels received by UEs 110. Each of these coverage enhancement levels may be associated with a defined number of repetitions (repetition level) .
  • Coverage level defines coverage with or without enhancement.
  • the coverage enhancement level also repetition level
  • R is represented below using the parameter R. However, in some examples, it may also represent coverage level.
  • a UE 110 is configured to perform wake-up paging 162.
  • Wake-up paging 162 uses a wake-up process 150 as a conditional stage before a paging process 152 in combination with discontinuous reception (DRX) in the idle mode 130.
  • DRX discontinuous reception
  • the UE 110 wakes 142’ (for wake-up signal 180) from a sleep state 140’once per wake-up cycle to monitor 150 a wake-up signal (WUS) 180 during its wake-up occasion (WO) .
  • WUS wake-up signal
  • the UE 110 If the UE 110 detects a wake-up signal 180, it starts 151 to monitor the control channel related to the paging process 152.
  • the UE 110 does not detect a wake-up signal 180 it returns 153 to the sleep state 140’and the wake-up cycle repeats.
  • the UE 110 monitors paging during its paging frame at its paging occasion (PO) .
  • PO paging occasion
  • a paging occasion is indicative of a particular occasion in time.
  • the particular time may be referenced as an offset position (subframe index) within a particular paging frame.
  • the ‘paging occasion’ may refer to the offset position.
  • the paging offset represents a particular absolute time e.g. a subframe index within a particular paging frame.
  • the UE 110 listens during its paging frame PF at its paging occasion PO for a paging signal 155. If the UE 110 is paged it may attempt to transition from the idle mode 130 to the connected mode 132. If the UE 110 is not paged it returns 141 to the sleep state 140’and the wake-up cycle repeats.
  • the paging process 152 may be the same as the paging process 144, as described in relation to Fig 3, or it may be different.
  • the paging signal 155, paging frame PF, paging occasion PO may be the same, as described in relation to Fig 3, or it may be different.
  • Not receiving a WUS 180 by a UE 110 allows that particular UE 110 to go back 153 to sleep 140’sooner. Without WUS monitoring 150, the UE 110 would always need to monitor the control channel for paging, as illustrated in Fig 3, even though there may not be a paging signal 145 intended for that particular UE in the paging occasion.
  • a UE using the wake-up process may also perform other operations such as synchronization and RRM measurements during the time it is awake. Some of these operations (e.g., synchronization) may be performed before the UE receives the WUS. Some operations (e.g., synchronization and/or RRM measurements) may be performed either during reception of the WUS or afterwards but before the UE goes back to sleep.
  • the WUS 180 is a power saving signal that indicates whether a UE 110 in idle mode 130 needs to monitor the control channel for paging 152.
  • the power-saving signal is “wake-up signal or DTX” . This means that a wake-up signal (WUS) 180 will be transmitted by the eNB 120 if the UE 110 is being paged152 whereas nothing will be transmitted (DTX) if the UE 110 can go back to sleep 140’. This reduces resource overhead and reduces interference to other UEs.
  • the WUS 180 has a low detection complexity e.g. it can be detected easily without blind detection. In some but not necessarily all examples, the WUS 180 is detected with correlation without channel estimation and equalization. In some but not necessarily all examples, the WUS 180 has a short transmission duration to reduce the power consumption for processing it. In some but not necessarily all examples, the WUS may be detected without prior synchronization) . In some but not necessarily all examples, the UE may perform timing and frequency error correction after detection of the WUS but before the PO.
  • a unique WUS 180 is created for groups of UEs 110 rather than for each UE 110.
  • Each group generally has a plurality of UEs 110.
  • the group of UEs wake 142’at the same time to monitor 150 for the WUS 180 of the group of UEs at a WO.
  • Transmission of the WUS 180 for that one group can cause all UEs 110 in that group to monitor 152 the subsequent paging occasion whereas UEs 110 in other groups go back 153 to sleep 140’. If no WUS 180 is transmitted (or detected) , all the UEs 110 go back 153 to sleep 140’.
  • a WUS 180 will be transmitted by the eNB 120 if a UE 110 is required to perform paging 152 whereas nothing will be transmitted (DTX) if the UE 110 can go back 153 to sleep 140’.
  • the division of UEs into groups by IMSI is sub-optimal.
  • coverage enhancement may require a WUS 180 to be sent multiple times.
  • Allocation of UEs 110 to wake-up groups 170 on the basis of coverage enhancement level means that all WUS 180 do not have to be sent at a coverage enhancement level corresponding to the worst coverage enhancement level in the group.
  • the maximum number of repetitions Rmax is needed to be used only for a single group of UEs rather than all groups of UEs. This reduces overhead.
  • Fig 5A illustrates an example of a method 200 for implementing the wake-up paging process 162, from a perspective of a network node, for example the eNB 120.
  • the method 200 comprises obtaining coverage enhancement levels for a plurality of user equipment (UE) 110 in a cell 122.
  • UE user equipment
  • the method 200 comprises grouping the UEs 110 into a multiplicity of groups 170 at least based on the respective coverage enhancement levels (R) of the UEs 110.
  • the method 200 comprises defining different characteristics of a wake-up paging process 162 for each of at least one of the multiplicity of groups 170, wherein the wake-up paging process 162 includes transmission of a wake-up signal 180 and subsequent transmission of a paging signal.
  • the method 200 comprises performing the wake-up paging process 162 for at least a group 170 of the UEs 110, by transmitting a wake-up signal 180 and subsequently transmitting a paging signal 155 in accordance with the characteristics of the wake-up paging process 162 previously defined for the group 170.
  • Defining wake-up paging process characteristics comprises in some examples defining only WUS process characteristics, in some examples defining only paging process characteristics and in some examples defining both WUS process characteristics and paging process characteristics.
  • block 206 of the wake-up paging process 200 comprises defining different characteristics of a wake-up signal 180 for each of at least one of the multiplicity of groups 170, wherein the wake-up signal 180 is transmitted in advance of a paging signal 155.
  • Block 208 of the wake-up paging process 200 then comprises transmitting a wake-up signal (WUS) 180 in accordance with the characteristics of the wake-up signal 180 previously defined for the group 170; and
  • Different WUS 180 are used for different groups 170.
  • the different characteristics of a wake-up signal 180 may, for example be length, or number of repetitions, and/or sequence.
  • the WUS 180 may vary also in terms of timing and/or resources.
  • the resource allocation may be narrowband (e.g. using different Paging Narrowbands (PNB) , or no-anchor carrier (e.g. using additional non-anchor carrier (s) to support paging) , for example.
  • PPB Paging Narrowbands
  • no-anchor carrier e.g. using additional non-anchor carrier (s) to support paging
  • Fig 5B illustrates an example of a method 210 for implementing the wake-up paging process 162, from a perspective of a UE 110.
  • the method 210 is for performance at a first user equipment 110.
  • the method 210 comprises identifying a group 170 associated with some but not all of a plurality of user equipment 110 in a cell 122, including being associated with the first user equipment 110, wherein a multiplicity of user equipment 110 within the group 170 share, to the exclusion of other groups 170, one or more, but not all, of multiple coverage enhancement levels of the cell 122.
  • the UE may identify a group of UEs the UE belongs to, wherein the group comprises a subset of user equipment in a cell and each UE in the groups share the same one or more coverage levels (but not all coverage levels of the cell) .
  • the method 210 comprises performing a wake-up paging process 162 for the group 170 comprising the first user equipment 110, by receiving a wake-up signal 180 and subsequently receiving 152 a paging signal 155 in accordance with characteristics of the wake-up paging process 162 defined for the group 170 comprising the first user equipment 110.
  • a UE 110 may determine whether or not it operates in the paging mode without wake-up 160 illustrated in Fig 3 or the wake-up paging mode 162 illustrated in Fig 4 and Fig 5B.
  • the paging mode without wake-up 160 uses a combination of discontinuous reception (DRX) and paging.
  • DRX discontinuous reception
  • the wake-up paging mode 162 uses a combination of discontinuous reception (DRX) and a wake-up signal process 150 as a WUS conditional stage before paging process 152.
  • DRX discontinuous reception
  • a wake-up signal process 150 uses a combination of discontinuous reception (DRX) and a wake-up signal process 150 as a WUS conditional stage before paging process 152.
  • the UE 110 controls a transition 161 that switches the wake-up paging mode 162 on.
  • the UE controls a transition 163 that switches the wake-up paging mode 162 off.
  • Fig 7 illustrates an example of a logical division of a set of UEs 110 into wake-up groups 170.
  • the figure illustrates the process of grouping the UEs 110 into a multiplicity of groups 170 at least based on the respective coverage enhancement levels R of the UEs 110.
  • Characteristics of the wake-up paging process 162 are differently defined for the different groups 170.
  • the wake-up paging process 162 is performed at the eNB 120 for a group 170 of the UEs, by transmitting a wake-up signal 180 and subsequently transmitting a paging signal 155 in accordance with the characteristics of the wake-up paging process 162 previously defined for the group 170.
  • a plurality of UEs 110 are logically divided into different subsets S ij .
  • the index i identifies a different combination of paging occasion PO and paging frame PF.
  • the index j identifies a different coverage enhancement level (or repetition levels) for the user equipment-R UE .
  • the PO or PF may be dependent upon the DRX cycle and the IMSI of the UE, as described previously and independent of the coverage enhancement levels (or repetition levels) for the user equipment-R UE .
  • the PO or PF may be dependent upon the coverage enhancement levels (or repetition levels) for the user equipment-R UE .
  • Each UE 110 is assignable to a subset S ij .
  • Each subset S ij may comprise none, one or more UEs 110.
  • Any subset S ij or combination of subsets S ij in the same column may be used to create a group 170.
  • Fig 8A all subsets S ij in the same column (same coverage enhancement level) create a group 170. There is a different group 170 for each column (same index j-coverage enhancement level) .
  • the group 170 is determined by the coverage enhancement level for the user equipment-R UE .
  • the wake-up paging process 162 includes transmission of a wake-up signal 180 at a wake-up occasion (WO) and a paging signal at a paging occasion (PO) .
  • the paging occasion is independent of the coverage enhancement level for the user equipment-R UE and independent of the group 170.
  • the paging occasion may be dependent on IMSI (see above) .
  • Each group 170 comprises multiple subsets S ij indexed by same j (the coverage enhancement level for the user equipment-R UE ) and indexed by a range of different i (paging occasions) .
  • the UEs 110 in the same group 170 have same coverage enhancement level for the user equipment-R UE but have any one of a number of different POs from a shared range of different POs) .
  • the UEs 110 in different groups 170 have different coverage enhancement levels for the user equipment-R UE but have any one of a number of different POs from the same shared range of different POs.
  • UEs 110 in same group 170 have the same R UE but any one of a number of different POs shared with other groups.
  • the UEs 110 which use the same PF &PO, are separated into groups per their coverage enhancement level for the user equipment-R UE .
  • Different groups 170 use different WUS 180.
  • a different separate WUS 180 is defined with a unique version of one or more of: sequence, a duration, repetition, cover code, frequency domain location and potentially also resource allocation (narrowband or non-anchor carrier) .
  • a frequency domain location is a location of a used frequency domain within an available frequency spectrum. e.g. a different physical resource block (PRB) or a different set of PRBs.
  • PRB physical resource block
  • a group 170 is created from less than all the subsets S ij in the same column (same index j, the coverage enhancement level) . There is a different group 170 for each column (coverage enhancement level) .
  • the group 170 is determined by the coverage enhancement level for the user equipment-R UE .
  • the wake-up paging process 162 includes transmission of a wake-up signal 180 at a wake-up occasion (WO) and a paging signal at a paging occasion (PO) .
  • the paging occasion is dependent of the coverage enhancement level for the user equipment-R UE and is therefore dependent on the group 170.
  • the PO may be exclusive to a group 170 and is not shared with other groups 170 associated with different R UE .
  • the paging frame (PF) calculation depends on the R UE .
  • Each group 170 comprises one or more subsets S ij indexed by same j (the coverage enhancement level for the user equipment-R UE ) and indexed by a one or more different i (paging occasions) exclusive to that group and not shared with other groups 170.
  • the UEs 110 in the same group 170 have the same coverage enhancement level for the user equipment-R UE but have any one of a number of different POs from a shared exclusive range of different POs.
  • the UEs in same group 170 have same R UE and may share a single PO exclusive to that group.
  • the UEs 110 in different groups 170 have different coverage enhancement levels for the user equipment-R UE and have different exclusive POs.
  • the UEs 110 which use the same PF &PO, have the same coverage enhancement level for the user equipment-R UE .
  • defining 206 characteristics of wake-up paging process 162 may comprise determining a different number of repetitions of the wake-up signal 180 for different groups 170. Otherwise each group 170 may share the same wake-up signal characteristics. For example, the different WUS 180 for each group 170 use the same WUS sequence but with different numbers of repetitions corresponding to the coverage enhancement level for the user equipment-R UE .
  • the equation for calculation of the PF depends on at least the coverage enhancement level for the user equipment-R UE .
  • the number of the coverage enhancement levels is broadcast in the system information.
  • the UE 110 determines its own coverage enhancement level for the user equipment-R UE , either through indication from the higher layers, by comparing a signal (e.g., Reference Signal Received Power RSRP) with threshold values broadcast in the system information, or by estimating the number of repetitions needed for a channel (e.g. the control channel used for paging) .
  • a signal e.g., Reference Signal Received Power RSRP
  • the eNB may determine the UE’s coverage enhancement level based on similar criteria, e.g. based on RSRP report from the UE or the expected number of repetitions for a channel (e.g. the control channel used for paging) .
  • the eNB can then signal the coverage enhancement level to the UE.
  • Nc be the number coverage enhancement (CE) levels. This corresponds to the size of the set of indices j. Then a 110 UE has a CE level r from ⁇ 0, 1, ...Nc-1 ⁇ . Note that the CE level r may be the last CE level UE has reported to the network or the last value configured by the eNB.
  • the PF may be given by the following equation for the system frame number (SFN) :
  • Tc 256 (default paging cycle in cell)
  • Tue 128 (UE-specific paging cycle)
  • nB 32 (number of paging subframes per paging cycle available to all UEs)
  • UE_ID IMSI mod 1024
  • the first paging frame values according to the legacy calculations for six UE_ID values ⁇ 73, 74, ..., 78 ⁇ are given by the following table (subsequent paging frames occur once every DRX cycle, i.e., once every 128 radio frames) .
  • the first PF is given by the following table.
  • UEs 110 are now distributed across the DRX cycle but also grouped together based on their CE levels.
  • the UEs 110 with higher CE levels are thus configured with a WUS 180 which is more appropriate to their coverage enhancement level, e.g. enough but not too many repetitions of the WUS 180.
  • the paging frames PF for UEs 110 with the same coverage enhancement level may be further distributed across time.
  • the WUS characteristics may be dependent upon R, for example, there may be selective wake-up based on R, different WO based on R, selection of UE for paging based on R.
  • the wake-up signals 180 for different groups 170 may, for example, be distinguished by different sequences e.g. sequences with low cross-correlation, shifts of a sequence, cover or scrambling codes, and/or different length or number of repetitions, that are broadcast as WUS characteristics for different groups 170.
  • the WO may be the same for all groups 170 i.e. fixed or the WO occasion may be different for different groups e.g. variable and dependent upon R.
  • defining 206 characteristics of a wake-up paging process may comprise determining that the wake-up signal 180 is not used for at least one group 170. This results in selective transmission of WUS 180 based on R. The WUS is not used for some R.
  • the characteristics of the wake-up paging process 162 are defined 206 by an algorithm based on coverage enhancement level R, that is common between the eNB 120 and the plurality of UEs 110 and is dependent on at least one parameter transmitted from the eNB 120 to the UEs 110.
  • coverage enhancement level R that is common between the eNB 120 and the plurality of UEs 110 and is dependent on at least one coverage enhancement level threshold T transmitted from the eNB 120 to the UEs 110.
  • the shared algorithm uses shared data, which may be recently broadcast information or the last known shared data.
  • whether the wake-up process 162 is active or inactive for a UE 110 may be determined by the MME 130 and indicated to the UE 110 through higher-layer signaling. In another example, whether the wake-up process 162 is active or inactive for a UE 110 may be determined by the MME 130 based on a request from the UE 110.
  • Fig 9 illustrates an example of signaling performed to support the wake-up paging 162, and in particular coordination of the UEs 110 and eNBs 120.
  • the MME 130 periodically indicates 302 to each eNB 120 within a tracking area, through S1 signaling:
  • the CE level R of all the UEs in idle mode 130 within that tracking area e.g. the number of repetitions or repetition level required for the control channel used for paging
  • the CE level R of all the UEs in idle mode 130 within that tracking area e.g. the number of repetitions or repetition level required for the control channel used for paging
  • the highest WUS repetition level R max is determined by the eNB 120 and may be smaller than needed to cover all UEs 110 in the cell 122.
  • the eNB 120 may choose to not support the WUS 180 for UEs 110 in very high CE levels within its cell 122.
  • Each eNB 120 signals 304, in a broadcast message such as system information, threshold values T for received signal (e.g. RSRP) corresponding to repetition levels R 1 , ..., R max of the WUS 180 in the cell 122.
  • threshold values T for received signal e.g. RSRP
  • the eNB 120 broadcasts 304 RSRP threshold values T 1 and T 2 and repetition levels R 1 , R 2 , and R max .
  • the eNB determines to transmit R ⁇ R max repetitions of the WUS 110 associated with the group 170 comprising that UE110.
  • Each UE 110 determines its own WUS repetition level R UE , i.e., the number of repetitions of the WUS 180 that it needs to correctly detect the WUS 180, based on the broadcast threshold values T and its own signal (e.g., RSRP) measurement.
  • R UE the number of repetitions of the WUS 180 that it needs to correctly detect the WUS 180
  • the UE if UE determines that R UE > R max , then the UE does not monitor 150 the WUS 180 prior to monitoring 152 the paging signal or the control channel for paging 155.
  • the UE 110 directly monitors 152 for the paging signal or the control channel for paging 155 in the current cell 122 even if it has been configured by the MME 130 to start using the WUS 180.
  • the algorithm uses current up-to-date information, in other examples it uses last-known data.
  • the current or last-known CE level R for creating groups 170 (both the eNB 120 and the UE 110 have a common knowledge of the CE level R last reported by the UE to the eNB) .
  • the UE 110 reports the received signal level (e.g., RSRP) to the eNB 120 and the eNB 120 determines the CE level R for the UE 110 based on this report.
  • the eNB 120 may then indicates the CE level R for the UE 110 through UE-specific signaling.
  • the UE reports the UE determined R-values to the MME and/or to the eNB.
  • each eNB 120 may signal 304, in a broadcast message such as system information, threshold values T for received signal (e.g. RSRP) corresponding to repetition levels R 1 , ..., R max in the cell 122.
  • T for received signal
  • the eNB 120 broadcasts 304 RSRP threshold values T 1 and T 2 and repetition levels R 1 , R 2 , and R max .
  • the UEs then determine the required repetition level R it requires.
  • Each UE 110 determines its own repetition level R UE , i.e., the number of repetitions that it needs to correctly detect, based on the broadcast threshold values T and its own signal (e.g., RSRP) measurement.
  • the eNB 120 or the UE 110 and the eNB 120 determines the repetition levels R UE .
  • the eNB 120 can determine the repetition levels R UE , from reports of received signal level (e.g. RSRP) received from the UE 110 either in addition to the UE 110 (using a common algorithm) or as an alternative, the repetition levels R UE then being sent from the eNB 120 to the MME 130 or the UE 110.
  • the MME 130 periodically updates302 the repetition levels of the UEs to the eNB 120.
  • a UE after determining its own repetition level R UE provides an indication of the determined repetition level to the MME 130 (not shown in Fig)
  • the MME 130 periodically updates302 the repetition levels of the UEs to the eNB 120.
  • the eNB 120 therefore performs grouping based on up-to-date knowledge of the repetition level (coverage enhancement level) of the UEs 110, as given by the MME 130.
  • the CE level may be based on most recently used repetition level between the UE 110 and the eNB 120. In both cases the eNB 120 and UE 110 have a common understanding about the CE level of the UE.
  • grouping may include taking into account the inactivated/activated UEs. i.e. build groups out of WUS-active UEs only.
  • the time interval during which the WUS 180 may be transmitted is the wake-up window (WUW) .
  • the eNB 120 may determine to transmit R ⁇ R max repetitions of the WUS 180 associated with a PO in the WUW.
  • the WUS 180 is transmitted with a configurable offset relative to the PO where the parameters for determining this offset are indicated in the system information by the eNB transmitting the WUS.
  • the offset ⁇ of the PO relative to the end of the WUW may be signaled in a broadcast message.
  • the number of repetitions, R, for the WUS 180 associated with a PO depends on the repetition levels R of the UEs 110 for which the eNB 120 is transmitting a paging signal at the PO.
  • the WUS when its duration is less than WUW, is in some examples located at a specific location of the WUW.
  • R ⁇ R max repetitions of the WUS 180 are transmitted, two alternative designs are possible for alignment of the WUS 180 with respect to the WUW:
  • the chosen alternative may either be fixed in the specification or signaled in a broadcast message. Transmissions with different number of repetitions R can thus have a predefined timing. This proposal may thus provide an exact location of the WUS, when R ⁇ Rmax repetitions are transmitted by the eNB.
  • the above steps ensure that the eNB 120 and the UE 110 have a common understanding of the maximum number of repetitions of the WUS, R max , and the actual number of repetitions of the WUS, R, that are transmitted within the WUW associated with a PO.
  • the eNB 120 performs the method 200 illustrated in Fig 5A.
  • the eNB 120 identifies a group 170 for the UE 110 specified in the paging request 312.
  • the identified group 170 determines characteristics of the wake-up paging process used to page the UE 110.
  • the eNB 120 performs the wake-up paging process 162 for that group 170 of the UEs 110, by transmitting a wake-up signal 180 and subsequently transmitting a paging signal 155 in accordance with the characteristics of the wake-up paging process defined for the group 170.
  • the eNB 120 performs the wake-up paging process 162 only for those groups 170 that comprise UEs 110 to be paged.
  • a group that it not intended to be paged may not be the subject of the wake-up paging process
  • the wake-up signal 180 may be specific to the group 170 e.g. specific sequence and/or specific number of repetitions may be used for each group.
  • the paging process may be specific to the group (Fig 7B) or may be defined by the IMSI (Fig 7A) .
  • groups may be divided into sub-groups and the method 100 then comprises performing the wake-up paging process only for those sub-groups that comprise UEs to be paged.
  • the WUS 180 is sent with a repetition level that ensures that all UEs for which it is intended can correctly detect the signal. As all UEs 110 in a group 170 have the same coverage enhancement, it is possible to base the repetition level on that coverage enhancement level.
  • the UE 110 and eNB 120 need to have a common understanding of a length (in terms of number of repetitions) of the WUS 180 that it needs so it can correctly detect it. It is useful to make the number of repetitions configurable and flexible rather than fixed.
  • Fig 10 illustrates an example of signaling performed to support switching on and switching offthe wake-up paging 162, and in particular switching a UE 110 from the wake-up paging process 162 to the non wake-up paging process 160.
  • UE 110 indicates 321 (to MME 130) its capability to use wake-up paging process 162.
  • the UE 110 may send its capability to the MME 130 through non-access stratum (NAS) signaling.
  • NAS non-access stratum
  • the MME 130 does not immediately configure the UE 110 to start receiving the WUS 180. Therefore, the MME 130, in any subsequent paging request 312 sent to the eNB 120, may indicate that the UF 110 is not configured for WUS monitoring 150.
  • the UE may indicate 322 its desire to activate the wake-up paging process 162. Alternatively this may occur at the same time as indication 321.
  • the UE 110 may make the indication 322 to the MME 130 through non-access stratum (NAS) signaling.
  • NAS non-access stratum
  • the NAS signaling may be 1-bit signaling, in which a single binary bit is used to represent one of two states. The two states of the single bit indicate whether the UE wants to activate or deactivate (if already active) the wake-up paging process.
  • the MME 130 determines whether to use WUS 180 for the UE 110. IfWUS is to be used, it signals back its acceptance 323 for the UE 110 to use WUS 180.
  • the MME 130 may provide the acceptance 323 to the UE 110 through non-access stratum (NAS) signaling.
  • NAS non-access stratum
  • the determination can be based on many factors (e.g. UE capability, UE’s request to use WUS, number of UEs requesting WUS, UE’s CE level, traffic profile, etc) .
  • the UE 110 is now configured to perform the wake-up paging process 162 and starts detecting the WUS 180.
  • the MME 130 in any subsequent paging request 312 sent to the eNB 120, indicates that the UE 110 is configured for WUS and attaches any UE-specific configuration information.
  • the eNB 120 In response to the paging request 312, the eNB 120 performs the method 200 illustrated in Fig 5A.
  • the eNB 120 identifies a group 170 for the UE 110 specified in the paging request 312.
  • the identified group 170 determines characteristics of the wake-up paging process used to page the UE 110.
  • the eNB 120 performs the wake-up paging process 162 for that group 170 of the UEs 110, by transmitting a wake-up signal 180 and subsequently transmitting a paging signal 155 in accordance with the characteristics of the wake-up paging process defined for the group 170.
  • the eNB 120 performs the wake-up paging process 162 only for those groups 170 that comprise UEs 110 to be paged. A group that it not intended to be paged may not be the subject of the wake-up paging process.
  • the UE may decide to indicate 324 its desire to deactivate the wake-up paging process 162.
  • the UE 110 may make the indication 324 to the MME 130 through non-access stratum (NAS) signaling.
  • NAS non-access stratum
  • the UE 110 can independently decide/request when to stop using the WUS monitoring 150 and revert to non wake-up paging 160 in which the WUS is not detected in advance of monitoring for paging.
  • the MME 130 signals back its acceptance 325 for the UE 110 to stop using WUS monitoring 150.
  • the UE 110 now does not expect to receive the WUS 180. It needs to be noted that the MME may also reject the request of the UE and indicate this to the UE e.g. in step 325 (and/or 323)
  • the MME 130 in any subsequent paging request 312 sent to the eNB 120, does not provide any WUS information for the UE 110.
  • the above method allows the UE 110 to signal to the network 100 when it wants to start or stop using the wake-up paging process 162.
  • the UE 110 may, for example, choose to use the wake-up paging process if it wants to enter a power-saving state.
  • the UE 110 may, for example, choose to use the wake-up paging process 162 if its tolerance to reception increases and/or its tolerance to transmission latency increases, and/or the likelihood of it producing data for transmission decreases, and/or the likelihood of it receiving data decreases, and/or the likelihood of it being mobile decreases.
  • each of the network nodes 110, 120, 130 may comprise a controller 400 and one or more radio transceivers 430.
  • controller 400 may be as controller circuitry.
  • the controller 400 may be implemented in hardware alone, have certain aspects in software including firmware alone or can be a combination of hardware and software (including firmware) .
  • controller 400 may be implemented using instructions that enable hardware functionality, for example, by using executable instructions of a computer program 406 in a general-purpose or special-purpose processor 402 that may be stored on a computer readable storage medium (disk, memory etc) to be executed by such a processor 402.
  • a general-purpose or special-purpose processor 402 may be stored on a computer readable storage medium (disk, memory etc) to be executed by such a processor 402.
  • the processor 402 is configured to read from and write to the memory 404.
  • the processor 402 may also comprise an output interface via which data and/or commands are output by the processor 402 and an input interface via which data and/or commands are input to the processor 402.
  • the memory 404 stores a computer program 406 comprising computer program instructions (computer program code) that controls the operation of the apparatus 500 when loaded into the processor 402.
  • the computer program instructions, of the computer program 406, provide the logic and routines that enables the apparatuses 500 to perform the methods illustrated in Figs 4, to 10.
  • the processor 402 by reading the memory 404 is able to load and execute the computer program 406.
  • the computer program 406 may arrive at the apparatus 500 via any suitable delivery mechanism 410.
  • the delivery mechanism 410 may be, for example, a non-transitory computer-readable storage medium, a computer program product, a memory device, a record medium such as a compact disc read-only memory (CD-ROM) or digital versatile disc (DVD) , an article of manufacture that tangibly embodies the computer program 406.
  • the delivery mechanism may be a signal configured to reliably transfer the computer program 406.
  • the apparatus 500 may propagate or transmit the computer program 406 as a computer data signal.
  • memory 404 is illustrated as a single component/circuitry it may be implemented as one or more separate components/circuitry some or all of which may be integrated/removable and/or may provide permanent/semi-permanent/dynamic/cached storage.
  • processor 402 is illustrated as a single component/circuitry it may be implemented as one or more separate components/circuitry some or all of which may be integrated/removable.
  • the processor 402 may be a single core or multi-core processor.
  • references to ‘computer-readable storage medium’ , ‘computer program product’ , ‘tangibly embodied computer program’ etc. or a ‘controller’ , ‘computer’ , ‘processor’ etc. should be understood to encompass not only computers having different architectures such as single/multi-processor architectures and sequential (Von Neumann) /parallel architectures but also specialized circuits such as field-programmable gate arrays (FPGA) , application specific circuits (ASlC) , signal processing devices and other processing circuitry.
  • References to computer program, instructions, code etc. should be understood to encompass software for a programmable processor or firmware such as, for example, the programmable content of a hardware device whether instructions for a processor, or configuration settings for a fixed-function device, gate array or programmable logic device etc.
  • the computer program 406 is a computer program that when run on a processor of a network node enables the network node to cause:
  • UE user equipment
  • the wake-up paging process includes transmission of a wake-up signal and subsequent transmission of a paging signal
  • performing the wake-up paging process for at least a group of the UEs by transmitting a wake-up signal and subsequently transmitting a paging signal in accordance with the characteristics of the wake-up paging process previously defined for the group.
  • the computer program 406 is a computer program that when run on a processor of first user equipment enables the first user equipment to cause:
  • identifying a group associated with some but not all of a plurality of user equipment in a cell including being associated with the first user equipment, wherein a multiplicity of user equipment within the group share, to the exclusion of other groups, one or more, but not all, of multiple coverage enhancement levels of the cell;
  • the apparatus 500 when configured to be operable as a network node 120 comprises:
  • processor 402 At least one processor 402;
  • At least one memory 404 including computer program code
  • the at least one memory 404 and the computer program code configured to, with the at least one processor 402, cause the apparatus 500 at least to perform:
  • UE user equipment
  • the wake-up paging process includes transmission of a wake-up signal and subsequent transmission of a paging signal
  • performing the wake-up paging process for at least a group of the UEs by transmitting a wake-up signal and subsequently transmitting a paging signal in accordance with the characteristics of the wake-up paging process previously defined for the group.
  • the apparatus 500 when configured to be operable as user equipment 110, comprises:
  • processor 402 At least one processor 402;
  • At least one memory 404 including computer program code
  • the at least one memory 404 and the computer program code configured to, with the at least one processor 402, cause the apparatus 500 at least to perform:
  • identifying a group associated with some but not all of a plurality of user equipment in a cell including being associated with the first user equipment, wherein a multiplicity of user equipment within the group share, to the exclusion of other groups, one or more, but not all, of multiple coverage enhancement levels of the cell; and performing a wake-up paging process for the group comprising the first user equipment, by receiving a wake-up signal and subsequently receiving a paging signal in accordance with characteristics of the wake-up paging process defined for the group comprising the first user equipment.
  • the apparatus 500 may additionally comprise a smart card 440 defining an international mobile subscriber identity (IMSI) wherein the paging occasion (PO) is dependent upon the defined international mobile subscriber identity (IMSI) .
  • the smart card may be a removable user identity module (R-UIM) or a subscriber identity module (SIM) .
  • controller circuitry 400 has been illustrated in Fig 1 1A, it should be appreciated that any suitable circuitry may be used for controller 400.
  • the apparatus 500 can comprise:
  • UE user equipment
  • apparatus 500 can comprise:
  • circuitry refers to all of the following:
  • circuits such as a microprocessor (s) or a portion of a microprocessor (s) , that require software or firmware for operation, even if the software or firmware is not physically present.
  • the apparatus 500 may be shared between two physically separate devices forming one operational entity. Therefore, the apparatus may be seen to depict the operational entity comprising one or more physically separate devices for executing at least some of the described processes.
  • the apparatus may comprise a remote control unit (RCU) , such as a host computer or a server computer, operatively coupled (e.g. via a wireless or wired network) to a remote radio head (RRH) located in the base station.
  • RCU remote control unit
  • RRH remote radio head
  • at least some of the described processes may be performed by the RCU.
  • the execution of at least some of the described processes may be shared among the RRH and the RCU.
  • the RCU may generate a virtual network through which the RCU communicates with the RRH.
  • virtual networking may involve a process of combining hardware and software network resources and network functionality into a single, software-based administrative entity, a virtual network.
  • Network virtualization may involve platform virtualization, often combined with resource virtualization.
  • Network virtualization may be categorized as external virtual networking which combines many networks, or parts of net-works, into the server computer or the host computer (i.e. to the RCU) . External network virtualization is targeted to optimized network sharing. Another category is internal virtual networking which provides network-like functionality to the software containers on a single system. Virtual networking may also be used for testing the terminal device.
  • the virtual network may provide flexible distribution of operations between the RRH (distributed unit) and the RCU (central unit) .
  • any digital signal processing task may be performed in either the RRH or the RCU and the boundary where the responsibility is shifted between the RRH and the RCU may be selected according to implementation.
  • circuitry applies to all uses of this term in this application, including in any claims.
  • circuitry would also cover an implementation of merely a processor (or multiple processors) or portion of a processor and its (or their) accompanying software and/or firmware.
  • circuitry would also cover, for example and if applicable to the particular claim element, a baseband integrated circuit or applications processor integrated circuit for a mobile phone or a similar integrated circuit in a server, a cellular network device, or other network device.
  • the blocks illustrated in the Figs 5A or 5B may represent steps in a method and/or sections of code in the computer program 406.
  • the illustration of a particular order to the blocks does not necessarily imply that there is a required or preferred order for the blocks and the order and arrangement of the block may be varied. Furthermore, it may be possible for some blocks to be omitted.
  • module refers to a unit or apparatus that excludes certain parts/components that would be added by an end manufacturer or a user.
  • the controller 400 may be a module.
  • the computer program 406 may be a module.
  • example or ‘for example’ or ‘may’ in the text denotes, whether explicitly stated or not, that such features or functions are present in at least the described example, whether described as an example or not, and that they can be, but are not necessarily, present in some of or all other examples.
  • ‘example’ , ‘for example’ or ‘may’ refers to a particular instance in a class of examples.
  • a property of the instance can be a property of only that instance or a property of the class or a property of a sub-class of the class that includes some but not all of the instances in the class. It is therefore implicitly disclosed that a feature described with reference to one example but not with reference to another example, can where possible be used in that other example but does not necessarily have to be used in that other example.

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Abstract

L'invention concerne un appareil comportant: au moins un processeur; et au moins une mémoire comprenant un code de programme d'ordinateur, la ou les mémoires et le code de programme d'ordinateur étant configurés pour, à l'aide du ou des processeurs, amener l'appareil à effectuer au moins les actions consistant à: obtenir des niveaux de couverture pour une pluralité d'équipements d'utilisateurs (UE) dans une cellule; regrouper les UE en une multiplicité de groupes en se basant au moins sur les niveaux respectifs de couverture des UE; définir différentes caractéristiques d'un processus de radiomessagerie de réveil pour chaque groupe d'au moins un groupe de la multiplicité de groupes, le processus de radiomessagerie de réveil comprenant l'émission d'un signal de réveil et l'émission subséquente d'un signal de radiomessagerie; et réaliser le processus de radiomessagerie de réveil pour au moins un groupe des UE, en émettant un signal de réveil et en émettant ensuite un signal de radiomessagerie selon les caractéristiques du processus de radiomessagerie de réveil définies précédemment pour le groupe.
PCT/CN2017/111740 2017-11-17 2017-11-17 Radiomessagerie WO2019095323A1 (fr)

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