Use of scheduling request and random access for LTE advanced networks

• US 9,621,209 B2
• Filed: 12/03/2013
• Issued: 04/11/2017
• Est. Priority Date: 12/03/2012
• Status: Active Grant

• Current Assignee: Apple Inc.
• Original Assignee: Intel Corporation
• Inventors: Koc, Ali T., Gupta, Maruti, Jha, Satish C., Vannithamby, Rath
• Primary Examiner(s): Pham, Chi H
• Assistant Examiner(s): CHOWDHURY, FAHMIDA S
• Application Number:
  US14/440,430
• Publication Number:
  US 20150289251A1
• Time in Patent Office: 1,225 Days
• CPC Class Codes: H04B 1/12 Neutralising, balancing, or compensation arrangements
• CPC Class Codes: H04B 1/3827 Portable transceivers
• CPC Class Codes: H04B 17/24 with feedback of measurements to the transmitter
• CPC Class Codes: H04B 17/26 using historical data, averaging values or statistics
• CPC Class Codes: H04B 17/345 Interference values signal-to-interference ratio [SIR] or carrier-to-interference ratio [CIR] H04B17/336
• CPC Class Codes: H04B 7/0452 Multi-user MIMO systems
• CPC Class Codes: H04B 7/0617 for beam forming
• CPC Class Codes: H04B 7/15557 Selecting relay station operation mode, e.g. between amplify and forward mode, decode and forward mode or FDD - and TDD mode
• CPC Class Codes: H04J 11/005 of intercell interference
• CPC Class Codes: H04J 11/0053 using co-ordinated multipoint transmission/reception co-ordinated antenna or beam-forming aspects H04B7/022
• CPC Class Codes: H04L 1/0003 by switching between different modulation schemes
• CPC Class Codes: H04L 1/0054 Maximum-likelihood or sequential decoding, e.g. Viterbi, Fano, ZJ algorithms
• CPC Class Codes: H04L 1/1854 Scheduling and prioritising arrangements
• CPC Class Codes: H04L 1/1867 Arrangements specially adapted for the transmitter end
• CPC Class Codes: H04L 25/0202 Channel estimation
• CPC Class Codes: H04L 25/0204 of multiple channels
• CPC Class Codes: H04L 25/03305 Joint sequence estimation and interference removal joint detection of several desired signals H04L25/03331
• CPC Class Codes: H04L 27/0008 arrangements for allowing a transmitter or receiver to use more than one type of modulation negotiating modulation type for two-way transmission paths H04L5/1453
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• 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 5/0057 : Physical resource allocation for CQI
• CPC Class Codes: H04L 5/0058 : Allocation criteria
• CPC Class Codes: H04L 5/0092 : Indication of how the channel is divided
• CPC Class Codes: H04W 24/02 : Arrangements for optimising operational condition
• CPC Class Codes: H04W 24/10 : Scheduling measurement reports ; Arrangements for measurement reports
• CPC Class Codes: H04W 36/10 : Reselecting an access point controller
• CPC Class Codes: H04W 40/16 : based on interference
• CPC Class Codes: H04W 52/0261 : managing power supply demand, e.g. depending on battery level
• CPC Class Codes: H04W 52/40 : during macro-diversity or soft handoff
• CPC Class Codes: H04W 72/12 : Wireless traffic scheduling
• CPC Class Codes: H04W 72/121 : for groups of terminals or users
• CPC Class Codes: H04W 72/20 : Control channels or signalling for resource management
• 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 72/54 : based on quality criteria
• CPC Class Codes: H04W 72/541 : using the level of interference
• CPC Class Codes: H04W 72/566 : of the information or information source or recipient
• CPC Class Codes: H04W 72/569 : of the traffic information
• CPC Class Codes: H04W 76/14 : Direct-mode setup
• 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 84/042 : Public Land Mobile systems, e.g. cellular systems
• CPC Class Codes: H04W 84/18 : Self-organising networks, e.g. ad-hoc networks or sensor networks
• CPC Class Codes: H04W 92/18 : between terminal devices
• CPC Class Codes: Y02D 30/70 : in wireless communication networks

Abstract

Methods and apparatus for communicating in a wireless network include mechanisms to facilitate concurrent use of periodic scheduling requests and a random access procedure for a UE to request uplink resources from an eNB.

Claims

1. An apparatus comprising:

memory circuitry having instructions; and

processing circuitry coupled with the memory circuitry to execute the instructions to;

generate a Power Preference Indicator (PPI) information element to indicate that the apparatus is to operate in a low-power consumption state;

generate a scheduling request (SR) for transmission to an eNB on a physical uplink control channel (PUCCH) with a predetermined periodicity; and

initiate, based on generation of the PPI information element, a Random Access procedure to request allocation of uplink resources while maintaining generation of scheduling requests with said predetermined periodicity.

3. The apparatus of claim 1, further comprising a receiver module to receive an RA blocking timer value from the eNB, and wherein the processing circuitry is further to inhibit initiation of the Random Access procedure if a time to transmission of the next periodic scheduling request is less than the received RA blocking timer value.

5. The apparatus of claim 3, wherein the receiver module is to receive an RRCConnectionReconfiguration message from the eNB, the RRCConnectionReconfiguration message comprising the RA blocking timer value.

6. The apparatus of claim 1, wherein the apparatus comprises a System on a Chip, a chipset, a user equipment or a Machine-Type Communication (MTC) device.

7. A user equipment comprising the apparatus of claim 1, further comprising one or more of:

a screen, a speaker, a touchscreen, a keyboard, an antenna array including a plurality of antennas, a graphics processor, or an application processor.

2. An apparatus comprising:

memory circuitry having instructions; and

processing circuitry coupled with the memory circuitry to execute the instructions to;

generate a scheduling request (SR) for transmission to an eNB on a physical uplink control channel (PUCCH) with a predetermined periodicity;

initiate a Random Access procedure to request allocation of uplink resources while maintaining generation of scheduling requests with said predetermined periodicity; and

cause the apparatus to operate in a discontinuous reception (DRX) cycle exceeding 500 ms.

4. An apparatus comprising:

memory circuitry having instructions; and

processing circuitry coupled with the memory circuitry to execute the instructions to;

initiate, during a first time period, a Random Access procedure to request allocation of uplink resources using a physical random access channel; and

generate, during a second time period, a scheduling request (SR) for transmission to an eNB on a physical uplink control channel (PUCCH) with a predetermined periodicity, wherein the predetermined periodicity is one of;

100 ms, 200 ms, 400 ms, 600 ms, 1000 ms, and 2560 ms.

8. One or more non-transitory, computer-readable media having instructions that, when executed, cause a device to:

transmit a periodic scheduling request (SR) to an eNB on a physical uplink control channel (PUCCH), the periodic scheduling request to be transmitted with a first predetermined periodicity; and

receive, in a radio resource control connection reconfiguration message, a random access (RA) blocking timer value from the eNB;

perform a random access (RA) procedure to request allocation of uplink resources while continuing to transmit the periodic scheduling request with said predetermined periodicity only if a time before transmission of a next periodic scheduling is greater than the RA blocking timer value.

9. The one or more non-transitory, computer-readable media of claim 8, wherein the instructions, when executed, further cause the device to receive an indication from the eNB that use of the random access procedure while continuing to transmit the periodic scheduling request is enabled by the eNB.

10. The one or more non-transitory, computer-readable media of claim 8, wherein the instructions, when executed, further cause the device to perform the random access procedure in response to identifying one or more uplink data packets to be transmitted to the eNB.

12. The one or more non-transitory, computer-readable media of claim 8, wherein the instructions, when executed, further cause the device to perform the random access procedure while continuing to transmit the periodic scheduling request in response to operation with a discontinuous reception (DRX) cycle exceeding 500 ms.

11. One or more non-transitory, computer-readable media having instructions that, when executed, cause a device to:

transmit a periodic scheduling request (SR) to an eNB on a physical uplink control channel (PUCCH), the periodic scheduling request to be transmitted with a first predetermined periodicity; and

perform a random access (RA) procedure to request allocation of uplink resources while continuing to transmit the periodic scheduling request with said predetermined periodicity,

wherein said performance of the random access procedure while continuing to transmit the periodic scheduling request is in response to operation in a low power consumption state.

13. An eNB for use in a wireless communication system and comprising:

memory circuitry having instructions; and

processing circuitry coupled with the memory circuitry to execute the instructions to;

determine that a UE connected to the eNB can support concurrent use of a scheduling request (SR) procedure and a random access (RA) procedure;

upon determining that the UE supports concurrent use of SR and RA procedures, provide an RA blocking timer to the UE; and

enable SR periodicities for use by the UE of greater than 80 ms.

14. The eNB of claim 13, wherein the processing circuitry is further to generate an RRCConnectionReconfiguration message comprising the RA blocking timer for transmission to the UE.

15. One or more non-transitory, computer-readable media having instructions that, when executed, cause a device to:

determine that a connected UE can support concurrent use of a scheduling request (SR) procedure and a random access (RA) procedure to request uplink resources; and

determine a blocking timer value based on a load on a Random Access Channel (RACH) and an estimated time for completion of a Random Access procedure by the UE;

wherein the instructions, when executed, further cause the device to transmit an RRCConnectionReconfiguration message to the UE, the RRCConnectionReconfigurationmessage comprising the blocking timer value.