Systems, methods, and devices with different radio link failure timers based on user equipment speed

• US 9,258,723 B2
• Filed: 06/27/2014
• Issued: 02/09/2016
• Est. Priority Date: 09/26/2013
• Status: Expired due to Fees

• Current Assignee: Intel Corporation
• Original Assignee: Intel IP Corporation (Intel Corporation)
• Inventors: Yiu, Candy, Aley, Daniel W.
• Primary Examiner(s): Ajayi, Joel
• Application Number:
  US14/317,184
• Publication Number:
  US 20150087317A1
• Time in Patent Office: 592 Days
• Field of Search: 455/441
• US Class Current: 1/1
• CPC Class Codes: G06F 9/4856 resumption being on a different machine, e.g. task migration, virtual machine migration G06F9/5088 takes precedence
• CPC Class Codes: H04L 1/12 by using return channel
• CPC Class Codes: H04L 1/1607 Details of the supervisory signal
• CPC Class Codes: H04L 1/1854 Scheduling and prioritising arrangements
• CPC Class Codes: H04L 1/1887 Scheduling and prioritising arrangements
• CPC Class Codes: H04L 47/12 Avoiding congestion; Recovering from congestion
• CPC Class Codes: H04L 47/122 by diverting traffic away from congested entities
• 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 5/0037 Inter-user or inter-terminal allocation
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• 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 67/025 for remote control or remote monitoring of applications
• CPC Class Codes: H04L 67/104 Peer-to-peer [P2P] networks
• CPC Class Codes: H04W 24/04 Arrangements for maintaining operational condition
• CPC Class Codes: H04W 24/10 Scheduling measurement reports ; Arrangements for measurement reports
• CPC Class Codes: H04W 28/02 Traffic management, e.g. flow control or congestion control
• CPC Class Codes: H04W 36/03 Reselecting a link using a direct mode connection
• CPC Class Codes: H04W 36/32 by location or mobility data, e.g. speed data
• CPC Class Codes: H04W 40/22 using selective relaying for reaching a BTS [Base Transceiver Station] or an access point
• CPC Class Codes: H04W 40/24 : Connectivity information management, e.g. connectivity discovery or connectivity update
• CPC Class Codes: H04W 48/16 : Discovering, processing access restriction or access information
• CPC Class Codes: H04W 52/0274 : by switching on or off the equipment or parts thereof
• CPC Class Codes: H04W 72/0446 : Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/0453 : Resources in frequency domain, e.g. a carrier in FDMA
• CPC Class Codes: H04W 72/23 : in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 76/14 : Direct-mode setup
• CPC Class Codes: H04W 76/18 : Management of setup rejection or failure
• CPC Class Codes: H04W 76/27 : Transitions between radio resource control [RRC] states
• 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 84/12 : WLAN [Wireless Local Area Networks]
• CPC Class Codes: H04W 88/08 : Access point devices
• CPC Class Codes: H04W 92/20 : between access points
• CPC Class Codes: Y02D 10/00 : Energy efficient computing, e.g. low power processors, power management or thermal management
• CPC Class Codes: Y02D 30/70 : in wireless communication networks

Abstract

Systems, methods, and device for adjusting an operation time of a radio link failure timer are disclosed herein. User equipment (UE) may be configured to communicatively couple to an evolved Universal Terrestrial Radio Access Network (E-UTRAN). The UE use different radio link failure timer parameters depending on the speed of the UE. The radio link failure timer may run for a longer time for rapidly moving UEs and run for a shorter time for slowly moving UEs. In an embodiment, the UE may scale the radio link failure timer by a scaling factor. In another embodiment, the UE may include multiple radio link failure timers for different speeds. The radio link failure timer parameters for each speed may be specified by the E-UTRAN in a one-to-one communication. The E-UTRAN may determine which parameters to use for each UE based on characteristics of the UE.

Claims

1. User equipment (UE) configured to communicate with an evolved universal terrestrial radio access network (eUTRAN), the UE comprising:

a transceiver; and

a processor coupled to the transceiver, the processor configured to;

receive a unicast message from the eUTRAN, the message comprising parameters for a set of timers and indicating which parameters to use for different UE speeds;

determine a radio link with the eUTRAN has a quality below a predetermined threshold;

configure the set of timers with the parameters for the different UE speeds, wherein the timer is set for longer when the UE is moving at a high speed than it is when the UE is moving at a low speed;

start the-set of timers;

after starting the set of timers, determine a current speed of the UE;

select a timer from the set of timers based on the current speed of the UE; and

declare a radio link failure when the-selected timer expires.

2. The UE of claim 1, wherein the parameters for the set of timers include a scaling factor, and wherein the-set of timers is multiplied by the scaling, factor to adjust a running time of the set of timers.

3. The UE of claim 2, wherein the scaling factor causes the set of timers to take less time to expire when the current speed of the UE is less than a predetermined threshold.

4. The UE of claim 1, wherein the parameters for the set of timers include a short-timer and a long timer.

5. The UE of claim 4, wherein the processor is configured to select the short timer when the current speed of the UE is less than a predetermined threshold.

6. The UE of claim 1, wherein the processor is configured to determine the radio link is bad by generating a predetermined number of out-of-sync indications.

7. The UE of claim 1, wherein the UE receives the indications of which timer parameters to use in a Radio Resource Control (RRC) message.

8. The UE of claim 1, further comprising:

a transceiver including transmitter and receiver components;

multiple antennas, in which a first antenna of the multiple antennas is coupled to the transmitter, and in which a second antenna of the multiple antennas is coupled to the receiver;

a display touchscreen; and

a keyboard.

9. A method for adjusting a time until a radio link failure is declared, the method comprising:

receiving configuration information from a base station in a one-to-one message;

configuring a set of radio link failure timers based on a set of speeds of the mobile user device indicated by the configuration information,

wherein a radio link failure timer is set for longer when the mobile user device is moving at a high speed than it is when the mobile user device is moving at a low speed;

detecting a radio link quality below a predetermined threshold;

starting the set of radio link failure timers in response to detecting the radio link quality below the predetermined threshold;

after starting the set of radio link failure timers, determining a speed of the mobile user device;

selecting a timer from the set of radio link failure timers based on the current speed of the mobile user device; and

declaring a radio link failure when the radio link failure timer expires.

10. The method of claim 9, wherein configuring the set of radio link failure timers comprises a long timer and a short timer.

11. The method of claim 9, wherein configuring the radio link failure timer comprises selecting a scaling factor to adjust a run time of the set of radio link failure timers.

12. The method of claim 9, wherein determining the speed of the mobile user device comprises classifying the mobile user device into one of a plurality of states based on the speed of the mobile user device.

13. The method of claim 12, wherein receiving configuration information comprises receiving configuration information associated with one or more of the plurality of states.

14. The method of claim 13, further comprising transmitting indications of characteristics of the mobile user device to the base station, wherein the configuration information is determined by the base station based on the indications of the characteristics.

15. A device for adjusting a time until a radio link failure is declared, the device comprising circuitry configured to:

access settings for a recovery timer for each of a plurality of speed states of the device, wherein the settings were indicated in a reconfiguration message from a base station;

upon detecting a decline in signal quality, start a set of recovery timers according to the settings for the plurality of speed states;

after starting the set of recovery timers, determine a current speed state of the device;

select a recovery timer from the set of recovery timers based at least in part on the current speed state of the device; and

determine whether the selected recovery timer indicates a radio link failure.

16. The device of claim 15, wherein the circuitry is further configured to switch to an idle mode in response to the selected recovery timer expiring.

17. The device of claim 15, wherein the settings for the set of recovery timers include a scaling factor for each of the plurality of speed states.

18. The device of claim 17, wherein the scaling factor decreases a running time of a recovery timer for a low speed state.

19. The device of claim 15, wherein the settings for the set of recovery timers include a running time for a short timer used in a low speed state and a running time for a long timer used in a high speed state.

20. The device of claim 19, wherein the circuitry is configured to:

start the short timer and the long timer upon detecting the decline in signal quality, and

determine, based on the current speed state, which of an expiration of the short timer and an expiration of long timer should cause the local transceiver to declare a radio link failure.

21. The device of claim 15, wherein the circuitry is configured to provide identifying information to the base station, and wherein the settings are selected by the base station based on the identifying information.