WO2013148234A1 - Dynamic measurement rates to speed up cell reselections - Google Patents

Dynamic measurement rates to speed up cell reselections Download PDF

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Publication number
WO2013148234A1
WO2013148234A1 PCT/US2013/031187 US2013031187W WO2013148234A1 WO 2013148234 A1 WO2013148234 A1 WO 2013148234A1 US 2013031187 W US2013031187 W US 2013031187W WO 2013148234 A1 WO2013148234 A1 WO 2013148234A1
Authority
WO
WIPO (PCT)
Prior art keywords
rat network
rate
measurements
network
rat
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/US2013/031187
Other languages
English (en)
French (fr)
Inventor
Jose Edson Vargas Bautista
Mutaz Zuhier Afif SHUKAIR
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Qualcomm Inc
Original Assignee
Qualcomm Inc
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
Publication date
Application filed by Qualcomm Inc filed Critical Qualcomm Inc
Priority to CN201380017518.XA priority Critical patent/CN104205931B/zh
Priority to EP13712100.0A priority patent/EP2832144B1/en
Priority to JP2015503289A priority patent/JP6258291B2/ja
Publication of WO2013148234A1 publication Critical patent/WO2013148234A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H04W36/0085—Hand-off measurements
    • H04W36/0094—Definition of hand-off measurement parameters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/14—Reselecting a network or an air interface
    • H04W36/144—Reselecting a network or an air interface over a different radio air interface technology
    • H04W36/1443—Reselecting a network or an air interface over a different radio air interface technology between licensed networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/28—Discontinuous transmission [DTX]; Discontinuous reception [DRX]

Definitions

  • OFDM is a spread-spectrum technique that modulates data over a number of subcarriers within an OFDM symbol.
  • the subcarriers are spaced apart at precise frequencies. The spacing provides "orthogonality" that enables a receiver to recover the data from the subcarriers.
  • a guard interval e.g., cyclic prefix
  • the UL may use SC- FDMA in the form of a DFT-spread OFDM signal to compensate for high peak-to- average power ratio (PAPR).
  • PAPR peak-to- average power ratio
  • Each stream is then mapped to an OFDM subcarrier, multiplexed with a reference signal (e.g., pilot) in the time and/or frequency domain, and then combined together using an Inverse Fast Fourier Transform (IFFT) to produce a physical channel carrying a time domain OFDM symbol stream.
  • the OFDM stream is spatially precoded to produce multiple spatial streams.
  • Channel estimates from a channel estimator 674 may be used to determine the coding and modulation scheme, as well as for spatial processing.
  • the channel estimate may be derived from a reference signal and/or channel condition feedback transmitted by the UE 650.
  • Each spatial stream is then provided to a different antenna 620 via a separate transmitter 618TX.
  • Each transmitter 618TX modulates an RF carrier with a respective spatial stream for transmission.
  • a change in measurement rate may be made independently of the paging monitoring rate defined for the DRX cycle.
  • the UE 206 continues to monitor paging occasions defined by the lower priority serving RAT when the IRAT measurement rate is increased in order to avoid missing pages. Increases in the IRAT measurement rate may be limited to short periods of time to preserve battery life, or other resources.
  • the UE 206 may set an increased rate of measurement equal to the DRX cycle frequency which, by DRX configuration, is an integer multiple of DRX measurement rate.
  • Timing chart 900 illustrates the specific example when the DRX cycle period is 1.28 seconds and the DRX measurement rate is calculated as 5 DRX cycles.
  • each increased measurement event 906 corresponds to a DRX event, with DRX measurement events 902 and 904.
  • FIG. 12 is a conceptual data flow diagram 1200 illustrating the data flow between different modules/means/components in an exemplary apparatus 1202.
  • the apparatus may be a UE 206.
  • the apparatus includes a module 1204 that measures one or more quantities of a target network, a module 1206 that determines whether a high- priority network connection is available when the apparatus is connected to a low- priority network based on the measured quantities, a module 1208 that detects that the UE 206 is in IDLE state, a module 1210 that determines when the UE 206 transitions into IDLE state, a module 1212 that selectively increases a rate of measurement of the high-priority network connection when presence of the high-priority network connection is determined, a module 1214 that switches to the high-priority network when the service quality is determined to exceed the threshold, and a module 1216 that enables communication with networks employing different RATs.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
PCT/US2013/031187 2012-03-30 2013-03-14 Dynamic measurement rates to speed up cell reselections Ceased WO2013148234A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN201380017518.XA CN104205931B (zh) 2012-03-30 2013-03-14 动态测量速率以加速小区重选
EP13712100.0A EP2832144B1 (en) 2012-03-30 2013-03-14 Dynamic measurement rates to speed up cell reselections
JP2015503289A JP6258291B2 (ja) 2012-03-30 2013-03-14 セル再選択を高速化するための動的測定レート

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US201261618564P 2012-03-30 2012-03-30
US61/618,564 2012-03-30
US13/801,597 US9479955B2 (en) 2012-03-30 2013-03-13 Dynamic measurement rates to speed up cell reselections
US13/801,597 2013-03-13

Publications (1)

Publication Number Publication Date
WO2013148234A1 true WO2013148234A1 (en) 2013-10-03

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2013/031187 Ceased WO2013148234A1 (en) 2012-03-30 2013-03-14 Dynamic measurement rates to speed up cell reselections

Country Status (5)

Country Link
US (1) US9479955B2 (enExample)
EP (1) EP2832144B1 (enExample)
JP (1) JP6258291B2 (enExample)
CN (1) CN104205931B (enExample)
WO (1) WO2013148234A1 (enExample)

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Also Published As

Publication number Publication date
EP2832144A1 (en) 2015-02-04
CN104205931A (zh) 2014-12-10
CN104205931B (zh) 2018-05-08
EP2832144B1 (en) 2017-08-23
US20130258883A1 (en) 2013-10-03
JP6258291B2 (ja) 2018-01-10
JP2015515808A (ja) 2015-05-28
US9479955B2 (en) 2016-10-25

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