Discontinuous reception (DRX) enhancements in LTE systems

• US 9,332,456 B2
• Filed: 09/27/2013
• Issued: 05/03/2016
• Est. Priority Date: 09/28/2012
• Status: Active Grant

• Current Assignee: Apple Inc.
• Original Assignee: Intel Corporation
• Inventors: Heo, Youn Hyoung, Zhang, Yujian, Fwu, Jong-Kae
• Primary Examiner(s): Chou, Albert T
• Application Number:
  US14/125,749
• Publication Number:
  US 20150305083A1
• Time in Patent Office: 949 Days
• US Class Current: 1/1
• CPC Class Codes: H04B 17/318 Received signal strength
• CPC Class Codes: H04J 11/00 Orthogonal multiplex systems, e.g. using WALSH codesH04J13/00 takes precedence
• CPC Class Codes: H04J 11/0086 Search parameters, e.g. search strategy, accumulation length, range of search, thresholds code acquisition in DSSS H04B1/7075
• CPC Class Codes: H04J 3/1694 Allocation of channels in TDM/TDMA networks, e.g. distributed multiplexers Passive Optical Networks H04Q11/0062
• CPC Class Codes: H04L 1/1812 Hybrid protocols; Hybrid automatic repeat request [HARQ]
• CPC Class Codes: H04L 1/1861 Physical mapping arrangements for ACK signaling see also H04L5/0053
• CPC Class Codes: H04L 1/1864 ARQ related signaling H04L1/1607 takes precedence
• CPC Class Codes: H04L 1/1893 Physical mapping arrangements physical resource mapping in general H04L5/00
• CPC Class Codes: H04L 41/069 using logs of notifications; Post-processing of notifications
• CPC Class Codes: H04L 41/5032 Generating service level reports
• CPC Class Codes: H04L 43/16 Threshold monitoring
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/0035 Resource allocation in a cooperative multipoint environment
• CPC Class Codes: H04L 5/0055 Physical resource allocation for ACK/NACK for physical mapping arrangements in ARQ protocols H04L1/1861
• CPC Class Codes: H04L 5/0057 Physical resource allocation for CQI
• CPC Class Codes: H04L 5/0073 Allocation arrangements that take into account other cell interferences for intercell interference mitigation or co-ordination in orthogonal multiplex systems H04J11/005
• CPC Class Codes: H04L 5/0091 Signaling for the administration of the divided path
• CPC Class Codes: H04L 5/14 Two-way operation using the same type of signal, i.e. duplex
• CPC Class Codes: H04L 65/60 Network streaming of media packets
• CPC Class Codes: H04L 65/612 for unicast
• CPC Class Codes: H04L 65/65 : Network streaming protocols, e.g. real-time transport protocol [RTP] or real-time control protocol [RTCP]
• CPC Class Codes: H04L 65/762 : at the source reformatting of additional data in video distribution servers H04N21/2355
• CPC Class Codes: H04L 67/10 : in which an application is distributed across nodes in the network software deployment G06F8/60; multiprogramming arrangements G06F9/46
• CPC Class Codes: H04W 24/02 : Arrangements for optimising operational condition
• CPC Class Codes: H04W 24/08 : Testing, supervising or monitoring using real traffic
• CPC Class Codes: H04W 24/10 : Scheduling measurement reports ; Arrangements for measurement reports
• CPC Class Codes: H04W 28/0205 : at the air interface dynamic wireless traffic scheduling H04W72/12
• CPC Class Codes: H04W 28/0215 : based on user or device properties, e.g. MTC-capable devices services for machine-to-machine communication [M2M] or machine type communication [MTC] H04W4/70; wireless resource selection or allocation plan definition based on terminal or device properties H04W72/51
• CPC Class Codes: H04W 28/0221 : power availability or consumption
• CPC Class Codes: H04W 28/0252 : per individual bearer or channel dynamic wireless traffic scheduling H04W72/12
• CPC Class Codes: H04W 28/0268 : using specific QoS parameters for wireless networks, e.g. QoS class identifier [QCI] or guaranteed bit rate [GBR] negotiating SLA or negotiating QoS H04W28/24
• CPC Class Codes: H04W 28/16 : Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
• CPC Class Codes: H04W 36/0061 : of neighbour cell information
• CPC Class Codes: H04W 36/0066 : of control information between different types of networks in order to establish a new radio link in the target network
• CPC Class Codes: H04W 36/0085 : Hand-off measurements
• CPC Class Codes: H04W 36/0088 : Scheduling hand-off measurements
• CPC Class Codes: H04W 36/22 : for handling the traffic
• CPC Class Codes: H04W 4/70 : Services for machine-to-machine communication [M2M] or machine type communication [MTC]
• CPC Class Codes: H04W 40/005 : Routing actions in the presence of nodes in sleep or doze mode
• CPC Class Codes: H04W 40/246 : Connectivity information discovery
• CPC Class Codes: H04W 48/14 : using user query or user detection
• CPC Class Codes: H04W 48/16 : Discovering, processing access restriction or access information
• CPC Class Codes: H04W 48/18 : Selecting a network or a communication service
• CPC Class Codes: H04W 48/20 : Selecting an access point
• CPC Class Codes: H04W 52/0209 : in terminal devices terminal devices per se H04W88/02
• CPC Class Codes: H04W 52/0212 : managed by the network, e.g. network or access point is master and terminal is slave
• CPC Class Codes: H04W 52/0225 : using monitoring of external events, e.g. the presence of a signal
• CPC Class Codes: H04W 52/0235 : where the received signal is a power saving command
• CPC Class Codes: H04W 52/0258 : controlling an operation mode according to history or models of usage information, e.g. activity schedule or time of day
• CPC Class Codes: H04W 52/0261 : managing power supply demand, e.g. depending on battery level
• CPC Class Codes: H04W 52/04 : TPC
• CPC Class Codes: H04W 52/14 : Separate analysis of uplink or downlink
• CPC Class Codes: H04W 72/02 : Selection of wireless resources by user or terminal
• CPC Class Codes: H04W 72/044 : based on the type of the allocated resource
• CPC Class Codes: H04W 72/0453 : Resources in frequency domain, e.g. a carrier in FDMA
• CPC Class Codes: H04W 72/20 : Control channels or signalling for resource management
• CPC Class Codes: H04W 72/21 : in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 72/23 : in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 72/30 : Resource management for broadcast services
• CPC Class Codes: H04W 72/52 : based on load
• CPC Class Codes: H04W 72/541 : using the level of interference
• CPC Class Codes: H04W 74/002 : Transmission of channel access control information
• CPC Class Codes: H04W 74/004 : in the uplink, i.e. towards network
• CPC Class Codes: H04W 76/12 : Setup of transport tunnels
• CPC Class Codes: H04W 76/15 : Setup of multiple wireless link connections
• CPC Class Codes: H04W 76/16 : Involving different core network technologies, e.g. a packet-switched [PS] bearer in combination with a circuit-switched [CS] bearer
• CPC Class Codes: H04W 76/23 : Manipulation of direct-mode connections
• CPC Class Codes: H04W 76/27 : Transitions between radio resource control [RRC] states
• CPC Class Codes: H04W 76/28 : Discontinuous transmission [DTX]; Discontinuous reception [DRX]
• CPC Class Codes: H04W 76/30 : Connection release
• CPC Class Codes: H04W 8/08 : Mobility data transfer
• CPC Class Codes: H04W 80/10 : adapted for application session management, e.g. SIP [Session Initiation Protocol] connection management H04W76/00; arrangements for session management H04L67/14
• CPC Class Codes: H04W 84/042 : Public Land Mobile systems, e.g. cellular systems
• CPC Class Codes: H04W 84/12 : WLAN [Wireless Local Area Networks]
• CPC Class Codes: H04W 88/02 : Terminal devices
• CPC Class Codes: H04W 88/06 : adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals
• CPC Class Codes: H04W 88/08 : Access point devices
• CPC Class Codes: H04W 88/12 : Access point controller devices
• CPC Class Codes: H04W 88/14 : Backbone network devices
• CPC Class Codes: H04W 88/16 : Gateway arrangements
• CPC Class Codes: H04W 88/18 : Service support devices; Network management devices
• CPC Class Codes: Y02D 30/70 : in wireless communication networks

Abstract

Embodiments of a system and method for providing DRX enhancements in LTE systems are generally described herein. In some embodiments, a system control module is provided for controlling communications via a communications interface. A processor is coupled to the system control module and is arranged to implement an inactivity timer and an on-duration timer for determining an active time for monitoring subframes on the physical downlink control channel for control signals, the processor further monitoring subframes after the active time.

Claims

1. A user equipment, comprising:

a system control module arranged to control communications via a communications interface; and

a processor, coupled to the system control module, the processor arranged to;

implement an inactivity timer and an on-duration timer for determining an active time for monitoring subframes on the physical downlink control channel (PDCCH) for control signals indicating resource allocations,

monitor subframes after the active time, and

implement a continuous reception mode, a short discontinuous reception cycle and a long discontinuous reception cycle, wherein a start offset of the long discontinuous reception cycle is set to seventy milliseconds to allow monitoring during a Hybrid Automatic Repeat Request (HARQ) timing period.

2. The user equipment of claim 1, wherein the processor is arranged to:

detect and initiate decoding of a control signal received on the PDCCH during a time period associated with a subframe providing the control signal, and

determine whether the decoding of the control signal has been completed at the end of the subframe providing the control signal.

3. The user equipment of claim 2, wherein the processor is arranged to continue to monitor subsequent subframes after the active time to determine whether a link grant is received in one of the subsequent subframes while the control signal is decoded.

4. The user equipment of claim 2, wherein the processor is further arranged to initiate the inactivity timer after the control signal has been decoded.

5. The user equipment of claim 2, wherein the control signal is received during the continuous reception mode.

6. The user equipment of claim 2, wherein the control signal is received during an on-duration period of the short discontinuous reception cycle.

7. The user equipment of claim 2, wherein the control signal is received during an on-duration period of the long discontinuous reception cycle.

8. A user equipment, comprising:

a system control module arranged to control communications via a communications interface; and

a processor, coupled to the system control module, the processor arranged to implement;

an inactivity timer and an on-duration timer for determining an active time for monitoring subframes on a physical downlink control channel (PDCCH) for resource allocations, and

a continuous reception mode, a short discontinuous reception cycle and a long discontinuous reception cycle, wherein a start offset of the long discontinuous reception cycle is set to seventy milliseconds to allow monitoring during a Hybrid Automatic Repeat Request (HARQ) timing period.

9. The user equipment of claim 8, wherein the processor is further arranged to monitor subsequent subframes after the active time.

10. The user equipment of claim 9, wherein the processor is further arranged to:

detect and initiate decoding of a control signal received on the PDCCH during a time period associated with a subframe providing the control signal,

determine whether the decoding of the control signal has been completed at an end of the subframe providing the control signal.

11. The user equipment of claim 10, wherein the processor is further arranged to continue to monitor the subsequent subframes after the active time to determine whether a link grant is received in one of the subsequent subframes while the control signal is decoded.

12. The user equipment of claim 10, wherein the processor is further arranged to initiate the inactivity timer after the control signal has been decoded.

13. The user equipment of claim 10, wherein the control signal is received in a subframe during the continuous reception mode.

14. The user equipment of claim 10, wherein the control signal is received in a subframe during an on-duration period of the short discontinuous reception cycle.

15. The user equipment of claim 10, wherein the control signal is received in a subframe during an on-duration period of the long discontinuous reception cycle.

16. A method for providing discontinuous reception monitoring of a physical downlink control channel, comprising:

implementing an inactivity timer and an on-duration timer for determining an active time for monitoring subframes on a physical downlink control channel for control signals;

receiving a control signal in a subframe received on the physical downlink control channel;

initiating decoding of the control signal during a time period associated with the subframe;

determining whether the decoding of the control signal has been completed at the end of the subframe; and

continuing to monitor subsequent subframes for control signals received on the physical downlink control channel after the active time, and

implementing a continuous reception mode, a short discontinuous reception cycle and a long discontinuous reception cycle and setting a start offset of the long discontinuous reception cycle to seventy milliseconds to allow monitoring during a Hybrid Automatic Repeat Request (HARQ) timing period.

17. The method of claim 16, wherein the continuing to monitor the subsequent subframes for control signals received on the physical downlink control channel after the active time comprises determining whether a link grant is received in one of the subsequent subframes while decoding the control signal.

18. The method of claim 16, wherein the receiving the control signal in the subframe received on the physical downlink control channel further comprises receiving the control signal in a subframe during the continuous reception mode.

19. A method for providing discontinuous reception monitoring of a physical downlink control channel, comprising:

determining an active time for monitoring subframes on a physical downlink control channel (PDDCH) for resource allocations based on an inactivity timer and on-duration timer;

implementing a continuous reception mode, a short discontinuous reception cycle and a long discontinuous reception cycle; and

setting a start offset of the long discontinuous reception cycle to seventy milliseconds to allow monitoring during a HARQ timing period.

20. The method of claim 19 further comprising monitoring subframes after the active time.

21. The method of claim 19 further comprising detecting a control signal received on the PDCCH during a time period associated with a subframe providing a control signal, decoding the control signal, determining whether the decoding of the control signal has been completed at the end of the subframe providing the control signal and continuing to monitor subsequent subframes after the active time.

22. A non-transitory computer-readable storage medium that stores instructions for execution by one or more processors of a user equipment (UE) to communicate with an evolved NodeB (eNB), the one or more processors to configure the UE to:

determine an active time for monitoring subframes on a physical downlink control channel (PDDCH) for resource allocations based on an inactivity timer and on-duration timer;

implement a continuous reception mode, a short discontinuous reception cycle and a long discontinuous reception cycle; and

set a start offset of the long discontinuous reception cycle to seventy milliseconds to allow monitoring during a HARQ timing period.

23. The medium of claim 22 wherein the instructions further configure the UE to monitor subframes after the active time.

24. The medium of claim 22 wherein the instructions further configure the UE to:

detect a control signal received on the PDCCH during a time period associated with a subframe providing a control signal,

decoding the control signal,

determine whether the decoding of the control signal has been completed at the end of the subframe providing the control signal, and

continue to monitor subframes after the active time.