User equipment and methods for handover enhancement using scaled time-to-trigger and time-of-stay

• US 9,160,515 B2
• Filed: 12/16/2013
• Issued: 10/13/2015
• Est. Priority Date: 04/04/2013
• Status: Expired due to Fees

• Current Assignee: Intel IP Corporation (Intel Corporation)
• Original Assignee: Intel IP Corporation (Intel Corporation)
• Inventors: Yiu, Candy, Zhang, Yujian
• Primary Examiner(s): Eisner, Ronald
• Application Number:
  US14/107,947
• Publication Number:
  US 20140302851A1
• Time in Patent Office: 666 Days
• Field of Search: 455436-444, 370321-334
• US Class Current: 1/1
• CPC Class Codes: H04B 1/38 Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
• CPC Class Codes: H04B 7/024 Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems
• CPC Class Codes: H04B 7/0456 Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
• CPC Class Codes: H04B 7/0639 Using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for beam selection
• CPC Class Codes: H04L 1/1854 Scheduling and prioritising arrangements
• CPC Class Codes: H04L 12/18 for broadcast or conference , e.g. multicast
• CPC Class Codes: H04L 43/0823 Errors, e.g. transmission errors
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• 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 5/0094 Indication of how sub-channels of the path are allocated
• CPC Class Codes: H04L 5/14 Two-way operation using the same type of signal, i.e. duplex
• CPC Class Codes: H04L 65/1016 IP multimedia subsystem [IMS]
• CPC Class Codes: H04L 65/1045 Proxies, e.g. for session initiation protocol [SIP]
• CPC Class Codes: H04L 65/1104 Session initiation protocol [SIP]
• CPC Class Codes: H04L 65/611 for multicast or broadcast systems for broadcast or conference H04L12/18; arrangements for broadcast or distribution combined with broadcast H04H20/00; arrangements for broadcast applications with a direct linkage to broadcast information or to broadcast space-time H04H60/00; selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS], H04W4/06
• CPC Class Codes: H04L 65/613 for the control of the source by the destination control signals issued by the client directed to the server or network components specially adapted for selective content distribution H04N21/637
• CPC Class Codes: H04L 67/02 based on web technology, e.g. hypertext transfer protocol [HTTP]
• CPC Class Codes: H04L 67/1076 Resource dissemination mechanisms or network resource keeping policies for optimal resource availability in the overlay network
• 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 36/0088 : Scheduling hand-off measurements
• CPC Class Codes: H04W 36/0094 : Definition of hand-off measurement parameters
• CPC Class Codes: H04W 36/14 : Reselecting a network or an air interface
• CPC Class Codes: H04W 36/30 : by measured or perceived connection quality data
• CPC Class Codes: H04W 36/36 : by user or terminal equipment
• CPC Class Codes: H04W 36/38 : by fixed network equipment
• CPC Class Codes: H04W 4/70 : Services for machine-to-machine communication [M2M] or machine type communication [MTC]
• CPC Class Codes: H04W 56/001 : Synchronization between nodes
• CPC Class Codes: H04W 68/02 : Arrangements for increasing efficiency of notification or paging channel
• CPC Class Codes: H04W 72/0446 : Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/1215 : for collaboration of different radio technologies
• CPC Class Codes: H04W 72/1263 : Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
• 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 72/51 : based on terminal or device properties
• CPC Class Codes: H04W 72/52 : based on load
• CPC Class Codes: H04W 74/0808 : using carrier sensing, e.g. carrier sense multiple access [CSMA]
• CPC Class Codes: H04W 76/00 : Connection management
• CPC Class Codes: H04W 76/10 : Connection setup
• CPC Class Codes: H04W 76/11 : Allocation or use of connection identifiers
• 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 76/20 : Manipulation of established connections
• CPC Class Codes: H04W 76/22 : Manipulation of transport tunnels
• 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 76/38 : triggered by timers
• CPC Class Codes: H04W 8/005 : Discovery of network devices, e.g. terminals
• CPC Class Codes: H04W 84/045 : using private Base Stations, e.g. femto Base Stations, home Node B
• 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 92/20 : between access points
• CPC Class Codes: Y02D 30/70 : in wireless communication networks

Abstract

Embodiments of user equipment (UE) and method for handover enhancement using a scaled time-to-trigger (TTT) and a time-of-stay are generally described herein. In some embodiments, the TTT is scaled based on at least one of a measured reference signal received quality (RSRQ) value of a serving cell and a time-of-stay in the serving cell.

Claims

1. A method performed by user equipment (UE) for handover initiation comprising:

measuring a reference signal received quality (RSRQ) of a serving cell;

scaling a time-to-trigger (TTT) based on at least one of the measured RSRQ and a time-of-stay in the serving cell; and

sending a measurement report after expiration of the scaled TTT,

wherein when the measured RSRQ is below a predetermined value, scaling the TTT comprises scaling down the TTT to a shorter TTT, and

wherein when the measured RSRQ is greater than or equal to the predetermined value, the method includes determining a time-of-stay in the serving cell and scaling down the TTT when the time-of-stay is greater than a predetermined value.

2. The method of claim 1 further comprising:

scaling up the TTT when the time-of-stay is less than or equal to the predetermined value; and

sending the measurement report after expiration of the scaled-up TTT.

4. The apparatus of claim 2 wherein the processing circuitry is further arranged to scale up the TTT when the time-of-stay is less than or equal to the predetermined value, and

wherein the PHY is configured to send the measurement report after expiration of the scaled-up TTT.

3. An apparatus for User equipment (UE) arranged for handover initiation in a 3GPP LTE network, the apparatus comprising:

processing circuitry to measure a reference signal received quality (RSRQ) of a serving cell and scale a time-to-trigger (TTT) based on at least one of the measured RSRQ and a time-of-stay in the serving cell; and

physical-layer circuitry (PHY) to send a measurement report after expiration of the scaled TTT,

wherein the processing circuitry is further arranged to scale down the TTT to a shorter TTT when the measured RSRQ is below a predetermined value, and

wherein when the measured RSRQ is greater than or equal to the predetermined value, the processing circuitry is further arranged to determine a time-of-stay in the serving cell and scale down the TTT when the time-of-stay is greater than a predetermined value.

5. A non-transitory computer-readable storage medium that stores instructions for execution by one or more processors to perform operations for handover initiation, the operations to configure the one or more processors to:

determine a measured reference signal received quality (RSRQ) of a serving cell;

scale a time-to-trigger (TTT) based on at least one of the measured RSRQ and a time-of-stay in the serving cell; and

provide instructions for sending a measurement report after expiration of the scaled TTT,

wherein when the measured RSRQ is below a predetermined value, the TTT is scaled down to a shorter TTT,

wherein when the measured RSRQ is greater than or equal to the predetermined value, a time-of-stay in the serving cell is determined and the TTT is scaled down when the time-of-stay is greater than a predetermined value.