WO2018143876A1 - Surveillance de canaux de commande spdcch tti courts - Google Patents

Surveillance de canaux de commande spdcch tti courts Download PDF

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Publication number
WO2018143876A1
WO2018143876A1 PCT/SE2018/050074 SE2018050074W WO2018143876A1 WO 2018143876 A1 WO2018143876 A1 WO 2018143876A1 SE 2018050074 W SE2018050074 W SE 2018050074W WO 2018143876 A1 WO2018143876 A1 WO 2018143876A1
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WIPO (PCT)
Prior art keywords
spdcch
stti
cycle
monitoring
monitoring cycle
Prior art date
Application number
PCT/SE2018/050074
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English (en)
Inventor
Malik Wahaj ARSHAD
Laetitia Falconetti
Henrik Enbuske
Original Assignee
Telefonaktiebolaget Lm Ericsson (Publ)
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
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Publication of WO2018143876A1 publication Critical patent/WO2018143876A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • 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
    • 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

  • Particular embodiments are directed to wireless communications and, more particularly, to a monitoring cycle for a short physical downlink control channel (sPDCCH) in a short transmission time interval (sTTI).
  • sPDCH short physical downlink control channel
  • sTTI short transmission time interval
  • LTE Long Term Evolution
  • data transmissions in both downlink i.e. from a network node or eNB to a wireless device or user equipment (UE)
  • uplink i.e., from a wireless device or UE to a network node or eNB
  • radio frames 10 ms.
  • LTE uses orthogonal frequency division multiplexing (OFDM) in the downlink and DFT-spread OFDM (also referred to as SC-FDMA) in the uplink (see 3 GPP TS 36.211).
  • OFDM orthogonal frequency division multiplexing
  • SC-FDMA DFT-spread OFDM
  • the basic LTE downlink physical resource can be represented as a time-frequency grid as illustrated in FIGURE 2.
  • FIGURE 2 illustrates an example LTE downlink physical resource.
  • Each square of the grid represents one resource element.
  • Each column represents one OFDM symbol including cyclic prefix.
  • Each resource element corresponds to one OFDM subcarrier during one OFDM symbol interval.
  • FIGURE 3 is a block diagram illustrating an example LTE uplink resource grid.
  • N ⁇ C B is the number of subcarriers in each RB.
  • N ⁇ C B 12.
  • a subcarrier and a SC-OFDM symbol form an uplink resource element (RE).
  • FIGURE 4 illustrates an example downlink subframe.
  • Downlink data transmissions from an eNB to a UE are dynamically scheduled (i.e., in each subframe the base station transmits control information about to which terminals data is transmitted and upon which resource blocks the data is transmitted in the current downlink subframe).
  • the control signaling is typically transmitted in the first 1, 2, 3 or 4 OFDM symbols in each subframe.
  • the illustrated example includes a downlink system with 3 OFDM symbols as control.
  • uplink transmissions from a UE to an eNB are also dynamically scheduled through the downlink control channel.
  • FDD frequency division duplex
  • TDD time division duplex
  • LTE supports a number of physical channels for data transmissions.
  • a downlink or an uplink physical channel corresponds to a set of resource elements carrying information originating from higher layers.
  • a downlink or an uplink physical signal is used by the physical layer but does not carry information originating from higher layers.
  • Some of the downlink physical channels and signals supported in LTE are: (a) Physical Downlink Shared Channel (PDSCH); (b) Physical Downlink Control Channel (PDCCH); (c) Enhanced Physical Downlink Control Channel (EPDCCH); and reference signals such as (d) Cell Specific Reference Signals (CRS); (e) DeModulation Reference Signal (DMRS) for PDSCH; and (f) Channel State Information Reference Signals (CSI-RS).
  • PDSCH Physical Downlink Shared Channel
  • PDCCH Physical Downlink Control Channel
  • EPDCCH Enhanced Physical Downlink Control Channel
  • reference signals such as (d) Cell Specific Reference Signals (CRS); (e) DeModulation Reference Signal (DMRS) for PDSCH; and (f) Channel State Information Reference
  • PDSCH is used mainly for carrying user traffic data and higher layer messages in the downlink.
  • PDSCH is transmitted in a downlink subframe outside of the control region as shown in FIGURE 4.
  • Both PDCCH and EPDCCH are used to cany downlink control information (DCI) such as physical resource block (PRB) allocation, modulation level and coding scheme (MCS), precoder used at the transmitter, etc.
  • DCI downlink control information
  • PRB physical resource block
  • MCS modulation level and coding scheme
  • PDCCH is transmitted in the first one to four OFDM symbols in a downlink subframe (i.e., the control region) while EPDCCH is transmitted in the same region as PDSCH.
  • Some of the uplink physical channels and signals supported in LTE are: (a) Physical Uplink Shared Channel (PUSCH); (b) Physical Uplink Control Channel (PUCCH); (c) DeModulation Reference Signal (DMRS) for PUSCH; and (d) DeModulation Reference Signal (DMRS) for PUCCH.
  • the PUSCH is used to carry uplink data or/and uplink control information from the UE to the eNodeB.
  • the PUCCH is used to carry uplink control information from the UE to the eNodeB.
  • One goal of LTE is latency reduction. Packet data latency is one of the performance metrics that vendors, operators and end-users (via speed test applications) regularly measure. Latency measurements are performed in all phases of a radio access network system lifetime, such as when verifying a new software release or system component, when deploying a system, and when the system is in commercial operation.
  • LTE Long Term Evolution
  • 3GPP RATs 3rd Generation Partnership Project
  • Radio resource efficiency may also be positively impacted by latency reductions.
  • Lower packet data latency can increase the number of transmissions possible within a certain delay bound.
  • higher Block Error Rate (BLER) targets may be used for the data transmissions, freeing up radio resources and potentially improving the capacity of the system.
  • BLER Block Error Rate
  • a TTI corresponds to one subframe (SF) of length 1 millisecond.
  • One such 1 ms TTI is constructed by using 14 OFDM or SC-FDMA symbols in the case of normal cyclic prefix and 12 OFDM or SC-FDMA symbols in the case of extended cyclic prefix.
  • Other LTE releases, such as LTE release 13 may specify transmissions with shorter TTIs, such as a slot or a few symbols.
  • a short TTI (sTTI) may have any duration in time and comprise resources on a number of OFDM or SC-FDMA symbols within a 1 ms subframe.
  • the duration of the uplink short TTI may be 0.5 ms (i.e., seven
  • the UE may possibly skip monitoring sPDCCH and potentially save energy.
  • RRC indicates the sPDCCH frequency region and the UE specific information is located in sDCI.
  • the UE has to read sPDCCH to get an indication if a sTTI allocation is available for it.
  • CE MAC Control Element
  • the UE can sleep based on the short or long DRX cycle length.
  • the DRX cycle defines a pattern in which a UE is supposed to monitor PDCCH in specific subframes and skip the PDCCH monitoring in the remaining subframes of the DRX cycle.
  • a goal of DRX is to provide battery saving opportunities to the terminal by controlling the time instances when the network can access the UE.
  • the introduction of short TTI may affect DRX timers.
  • the DRX functionality includes several timers that are all based on subframe level granularity (i.e., subframes in which the UE should monitor the PDCCH).
  • the embodiments described herein include a short TTI monitoring cycle for a short physical downlink control channel (sPDCCH) that may be activated or deactivated by a MAC control element.
  • the short TTI sPDCCH monitoring cycle includes an on-off partem like normal DRX, but with a granularity at symbol level TTI.
  • a short TTI sPDCCH monitoring cycle configuration enables the UE to skip reading sPDCCH occasions when scheduled with 1 ms TTI.
  • a network node comprises processing circuitry.
  • the processing circuitry is operable to: determine a sTTI monitoring cycle for a sPDCCH; and communicate the sPDCCH sTTI monitoring cycle to a wireless device.
  • the sPDCCH sTTI monitoring cycle is activated via a media access control (MAC) control element (CE), activated automatically to coincide with an ON duration of a one millisecond TTI DRX cycle, or activated automatically upon switching from using sTTI grants to using one millisecond TTI grants.
  • MAC media access control
  • the sPDCCH sTTI monitoring cycle is activated via a media access control (MAC) control element (CE), activated automatically to coincide with an ON duration of a one millisecond TTI DRX cycle, or activated automatically upon switching from using sTTI grants to using one millisecond TTI grants.
  • MAC media access control
  • the computer program product comprises instructions stored on non-transient computer-readable media which, when executed by a processor, perform the steps of: determining a sTTI monitoring cycle for a sPDCCH; and communicating the sPDCCH sTTI monitoring cycle to a wireless device.
  • FIGURE 4 illustrates an example downlink subframe
  • FIGURE 5 is a block diagram illustrating an example wireless network, according to some embodiments.
  • FIGURE 11A is a block diagram illustrating an example embodiment of a network node.
  • 2 symbol sTTI includes a maximum of six sTTIs per 1 ms subframe, which means that the UE has to monitor a total of six sPDCCH symbols along with at least one PDCCH symbol (i.e., a six fold increase in UE monitoring occasions).
  • the UE stays active during the entire 1 ms subframe period compared to legacy 1 ms TTI where the UE only needs to search for the PDCCH at the first three OFDM symbols.
  • power saving opportunities decrease with the number of short TTI symbols per 1 ms time frame because of increased sPDCCH monitoring requirements.
  • Particular embodiments obviate the problems described above and include a short TTI sPDCCH monitoring configuration that may be activated or deactivated by a MAC control element.
  • the short TTI sPDCCH monitoring includes an on-off partem like normal DRX, but with a granularity at symbol level TTI.
  • the short TTI sPDCCH monitoring configuration enables the UE to skip reading sPDCCH occasions when scheduled with 1 ms TTI.
  • Particular embodiments facilitate enhanced battery saving for a UE by skipping monitoring of sPDCCH occasions based on short TTI sPDCCH monitoring cycle configuration.
  • references in the specification to "one embodiment,” “an embodiment,” “an example embodiment,” etc., indicate that the embodiment described may include a particular feature, structure, or characteristic, but every embodiment may not necessarily include the particular feature, structure, or characteristic. Moreover, such phrases are not necessarily referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with an embodiment, it is submitted that it is within the knowledge of one skilled in the art to implement such feature, structure, or characteristic in connection with other embodiments, whether or not explicitly described.
  • FIGURES 5-1 IB of the drawings like numerals being used for like and corresponding parts of the various drawings.
  • LTE and NR are used throughout this disclosure as an example cellular system, but the ideas presented herein may apply to other wireless communication systems as well.
  • FIGURE 5 is a block diagram illustrating an example wireless network, according to a particular embodiment.
  • Wireless network 100 includes one or more wireless devices 110 (such as mobile phones, smart phones, laptop computers, tablet computers, MTC devices, or any other devices that can provide wireless communication) and a plurality of network nodes 120 (such as base stations or eNodeBs).
  • Wireless device 110 may also be referred to as a UE.
  • Network node 120 serves coverage area 115 (also referred to as cell 115).
  • wireless devices 110 that are within coverage of network node 120 (e.g., within cell 115 served by network node 120) communicate with network node 120 by transmitting and receiving wireless signals 130.
  • wireless devices 110 and network node 120 may communicate wireless signals 130 containing voice traffic, data traffic, and/or control signals.
  • a network node 120 communicating voice traffic, data traffic, and/or control signals to wireless device 110 may be referred to as a serving network node 120 for the wireless device 110.
  • Communication between wireless device 110 and network node 120 may be referred to as cellular communication.
  • Wireless signals 130 may include both downlink transmissions (from network node 120 to wireless devices 110) and uplink transmissions (from wireless devices 110 to network node 120).
  • Each network node 120 may have a single transmitter 140 or multiple transmitters 140 for transmitting signals 130 to wireless devices 110.
  • network node 120 may comprise a multi -input multi-output (MIMO) system.
  • each wireless device 110 may have a single receiver or multiple receivers for receiving signals 130 from network nodes 120 or other wireless devices 110.
  • MIMO multi -input multi-output
  • Wireless signals 130 may include transmission units or transmission time intervals (TTI) (e.g., subframes) such as those described with respect to FIGURES 1-4.
  • the TTI may include shortened TTI (e.g., TTI comprising two, three, seven, etc. symbols).
  • Wireless device 110 may monitor for wireless signals 130 according to a DRX cycle.
  • network node 120 may configure wireless device 110 to monitor wireless signals 130 according to a 1 ms DRX cycle and/or a sTTI sPDCCH monitoring cycle.
  • Wireless device 110 may monitor wireless signal 130 according to the configured DRX cycle or cycles. Particular algorithms for configuring and monitoring according to a sTTI sPDCCH monitoring cycle are described in more detail with respect to FIGURES 6-9.
  • each network node 120 may use any suitable radio access technology, such as long term evolution (LTE), LTE-Advanced, UMTS, HSPA, GSM, cdma2000, NR, WiMax, WiFi, and/or other suitable radio access technology.
  • Wireless network 100 may include any suitable combination of one or more radio access technologies. For purposes of example, various embodiments may be described within the context of certain radio access technologies. However, the scope of the disclosure is not limited to the examples and other embodiments could use different radio access technologies.
  • a wireless network may include one or more wireless devices and one or more different types of radio network nodes capable of communicating with the wireless devices.
  • the network may also include any additional elements suitable to support communication between wireless devices or between a wireless device and another communication device (such as a landline telephone).
  • a wireless device may include any suitable combination of hardware and/or software.
  • a wireless device such as wireless device 110
  • a network node may include any suitable combination of hardware and/or software.
  • a network node, such as network node 120 may include the components described with respect to FIGURE 11 A below.
  • a potential problem associated with DRX efficiency is during a switch from short TTI to 1 ms TTI.
  • the main use case for short TTI grants is during the TCP ramp up procedure.
  • Short TTI grants are allocated during the TCP ramp up and then the grants are switched to 1 ms TTI (legacy) to reduce control overhead gains.
  • the UE continues to monitor the sPDCCH along with receiving PDSCH grants for the remaining parts of TCP connection. This creates an unnecessary burden for UE to read PDCCH, PDSCH and sPDCCH even though the scheduler would not move to short TTI until the transfer is completed or a parallel TCP session starts.
  • there is a need to improve the power saving opportunities for the UE in this situation.
  • Particular embodiments include a short TTI sPDCCH monitoring configuration that is activated immediately or soon after the switch from short TTI to 1 ms TTI.
  • the short TTI sPDCCH monitoring includes an on-off pattern like normal DRX, but with a granularity at symbol level TTI as illustrated in FIGURE 6.
  • FIGURE 6 is a timing diagram illustrating a sPDCCH sTTI monitoring cycle configuration to skip sPDCCH monitoring, according to some embodiments.
  • the horizontal axis represents time.
  • a wireless device such as wireless device 110, monitors sPDCCH in the on duration and does not monitor sPDCCH in the off duration.
  • the Inactivity timer of the 1 ms TTI DRX cycle expires, the 1 ms TTI OFF duration starts and prevails over the short TTI sPDCCH monitoring cycle which is implicitly deactivated or deconfigured.
  • the short TTI sPDCCH monitoring on-off partem may be configured by RRC like conventional DRX. Some embodiments may include activation via a MAC-CE.
  • the MAC-CE may be sent at the switch point from short TTI to normal 1 ms TTI as illustrated in FIGURE 6, or in scenarios with very long onDurationTimer values. Once the MAC CE for short TTI sPDCCH monitoring configuration is sent, the wireless device activates the short TTI sPDCCH monitoring.
  • the MAC-CE may activate a stored RRC configured sPDCCH monitoring configuration or a specific set of parameters associated with a sTTI switch whereas the detection of an uplink or downlink allocation in a PDCCH subframe (PDCCH and/or sPDCCH) starts an inactivity timer.
  • the wireless device may continue to receive the 1 ms grants on PDSCH for the remaining parts of the TCP connection and follow short TTI sPDCCH monitoring configuration for sPDCCH monitoring. This avoids the situation when the wireless device has to monitor all sPDCCH instances together with receiving downlink data on PDSCH.
  • the short TTI sPDCCH monitoring is configured via RRC in a similar manner as the conventional 1 ms TTI DRX is configured. This simplifies the configuration process by configuring the wireless device with a sPDCCH monitoring configuration for 1 ms TTI as well as a DRX configuration for short TTI.
  • Particular embodiments may configure a wireless device with two separate DRX cycles. Some embodiments may configure separate parameters or parameter sets conditioned to and/or activated independently by an active sTTI allocation or a switch from sTTI to 1 ms TTI or other.
  • One DRX cycle may correspond to the 1 ms TTI DRX and the second DRX cycle corresponds to the short TTI sPDCCH monitoring.
  • the active/activated parameter sub-set may define the DRX mode and the DRX cycle with associated parameters, constant and values.
  • the corresponding parameters of the DRX cycles may be independent from each other.
  • the parameters for the short TTI sPDCCH monitoring cycle can include an on duration timer for short TTI, a total short TTI sPDCCH monitoring cycle duration, and an inactivity timer.
  • the timer referenced time in PDCCH subframes may include or alternatively define the presence of PDCCH occasions such that a timer may instead count the number of possible occasions for which an allocation in PDCCH and/or PDCCH may be detected. This facilitates a smaller granularity of sPDCCH monitoring and enables the eNB to schedule a sPDCCH monitoring pattern in which the UE monitors specific time instances where sPDCCH occurs and skip the remaining sPDCCH time instances within a short sPDCCH monitoring cycle.
  • a wireless device enters the onDuration phase of the short TTI sPDCCH monitoring when it has been activated when the inactivity timer of the short TTI sPDCCH monitoring cycle expires.
  • FIGURE 8 is a flow diagram illustrating an example method in a network node, according to some embodiments. In particular embodiments, one or more steps of FIGURE 8 may be performed by components of wireless network 100 described with respect to FIGURE 5.
  • the sTTI sPDCCH monitoring cycle may apply to an ON duration of a 1 ms TTI DRX cycle.
  • the sTTI sPDCCH monitoring cycle may be activated via a media access control (MAC) control element (CE), or automatically to coincide with an ON duration of a 1 ms TTI DRX cycle.
  • the sTTI sPDCCH monitoring cycle may be deactivated via a MAC CE, or automatically to coincide with an OFF duration of a 1 ms TTI DRX cycle.
  • the sTTI sPDCCH monitoring cycle may be determined according to any of the embodiments described with respect to FIGURES 6 and 7.
  • the method begins at step 912, where the wireless device receives a configuration for a sTTI sPDCCH monitoring cycle.
  • wireless device 110 may receive a configuration for a sTTI sPDCCH monitoring cycle from network node 120.
  • the sTTI sPDCCH monitoring cycle may apply to an ON duration of a 1 ms TTI DRX cycle.
  • the sTTI sPDCCH monitoring cycle may be activated via a MAC CE, or automatically to coincide with an ON duration of a 1 ms TTI DRX cycle.
  • the sTTI sPDCCH monitoring cycle may be deactivated via a MAC CE, or automatically to coincide with an OFF duration of a 1 ms TTI DRX cycle.
  • the sTTI sPDCCH monitoring cycle may be determined according to any of the embodiments described with respect to FIGURES 6 and 7.
  • method 900 Modifications, additions, or omissions may be made to method 900. Additionally, one or more steps in method 900 of FIGURE 9 may be performed in parallel or in any suitable order. The steps of method 900 may be repeated over time as necessary.
  • FIGURE 1 OA is a block diagram illustrating an example embodiment of a wireless device.
  • the wireless device is an example of the wireless devices 110 illustrated in FIGURE 5.
  • the wireless device is capable of receiving a sTTI sPDCCH monitoring cycle configuration and monitoring a received wireless signal according to the received sTTI sPDCCH monitoring cycle.
  • Memory 1030 is generally operable to store computer executable code and data.
  • Examples of memory 1030 include computer memory (e.g., Random Access Memory (RAM) or Read Only Memory (ROM)), mass storage media (e.g., a hard disk), removable storage media (e.g., a Compact Disk (CD) or a Digital Video Disk (DVD)), and/or or any other volatile or non-volatile, non-transitory computer-readable and/or computer-executable memory devices that store information.
  • RAM Random Access Memory
  • ROM Read Only Memory
  • mass storage media e.g., a hard disk
  • removable storage media e.g., a Compact Disk (CD) or a Digital Video Disk (DVD)
  • CD Compact Disk
  • DVD Digital Video Disk
  • Receiving module 1050 may perform the receiving functions of wireless device 110. For example, receiving module 1050 may receive a configuration for a sTTI sPDCCH monitoring cycle. Receiving module 1050 may receive the sTTI sPDCCH monitoring cycle configuration according to any of the embodiments described with respect to FIGURES 6-9. In certain embodiments, receiving module 1050 may include or be included in processing circuitry 1020. In particular embodiments, receiving module 1050 may communicate with monitoring module 1052.
  • Determining module 1150 may perform the determining functions of network node 120. For example, determining module 1150 may determine a sTTI sPDCCH monitoring cycle configuration. Determining module 1150 may determine the sTTI sPDCCH monitoring cycle configuration according to any of the embodiments described with respect to FIGURES 6-9. In certain embodiments, determining module 1150 may include or be included in processing circuitry 1120. In particular embodiments, determining module 1150 may communicate with communicating module 1152.
  • RRC configuration of sPDCCH search space and/or sPDCCH frequency region; or (b) UE-specific information in sDCI related to sPDSCH/sPUSCH.
  • RRC configuration may or may not at least partially indicate sPDCCH frequency region/search space for the following variants: (l)(a) slow DCI: non UE-specific information in PDCCH;

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

Abstract

Selon certains modes de réalisation, un procédé dans un nœud de réseau consiste : à déterminer un cycle de surveillance d'intervalle de temps de transmission court (sTTI) pour un canal de commande de liaison descendante physique court (sPDCCH); et à communiquer le cycle de surveillance de sTTI de sPDCCH à un dispositif sans fil. Le cycle de surveillance sTTI de sPDCCH peut comprendre un motif de surveillance marche-arrêt au niveau d'une granularité de symbole de modulation, ou un nombre de sPDCCH afin de surveiller par cycle. Le cycle de surveillance sTTI de sPDCCH peut s'appliquer pendant une durée de MARCHE d'un cycle de réception discontinue (DRX) d'intervalle de temps de transmission (DRX) d'une milliseconde, et ne s'applique pas pendant la durée D'ARRÊT. Le cycle de surveillance sTTI de sPDCCH peut être activé/désactivé automatiquement lors de la commutation depuis/vers l'utilisation d'autorisations sTTI afin d'utiliser des attributions de TTI d'une milliseconde. Un procédé dans un dispositif sans fil peut comprendre : la réception d'une configuration pour un cycle de surveillance sTTI pour un sPDCCH; et la surveillance d'un signal sans fil reçu pour sPDCCH selon le cycle de surveillance sTTI de sPDCCH reçu.
PCT/SE2018/050074 2017-02-03 2018-02-01 Surveillance de canaux de commande spdcch tti courts WO2018143876A1 (fr)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020251211A1 (fr) * 2019-06-14 2020-12-17 Samsung Electronics Co., Ltd. Procédé et appareil d'un terminal et d'une station de base dans un système de communication sans fil prenant en charge un fonctionnement en réception discontinue (drx)
CN115066933A (zh) * 2020-02-14 2022-09-16 中兴通讯股份有限公司 控制信道监控的方法
US11671204B2 (en) 2017-08-10 2023-06-06 Beijing Xiaomi Mobile Software Co., Ltd. Wireless device control channel monitoring

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Publication number Priority date Publication date Assignee Title
WO2016064048A1 (fr) * 2014-10-21 2016-04-28 Lg Electronics Inc. Procédé de surveillance d'un canal de commande de liaison descendante dans un système de communication sans fil et appareil associé

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016064048A1 (fr) * 2014-10-21 2016-04-28 Lg Electronics Inc. Procédé de surveillance d'un canal de commande de liaison descendante dans un système de communication sans fil et appareil associé

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11671204B2 (en) 2017-08-10 2023-06-06 Beijing Xiaomi Mobile Software Co., Ltd. Wireless device control channel monitoring
WO2020251211A1 (fr) * 2019-06-14 2020-12-17 Samsung Electronics Co., Ltd. Procédé et appareil d'un terminal et d'une station de base dans un système de communication sans fil prenant en charge un fonctionnement en réception discontinue (drx)
US11425648B2 (en) 2019-06-14 2022-08-23 Samsung Electronics Co., Ltd. Operation with power saving in connected mode discontinuous reception (C-DRX)
US11856516B2 (en) 2019-06-14 2023-12-26 Samsung Electronics Co., Ltd. Operation with power saving in connected mode discontinuous reception (C-DRX)
CN115066933A (zh) * 2020-02-14 2022-09-16 中兴通讯股份有限公司 控制信道监控的方法

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