Radio link monitoring

• US 10,477,575 B2
• Filed: 02/01/2018
• Issued: 11/12/2019
• Est. Priority Date: 11/27/2013
• Status: Active Grant

• Current Assignee: Apple Inc.
• Original Assignee: Intel Corporation
• Inventors: Sivanesan, Kathiravetpillai, Koc, Ali Taha, Jha, Satish C., Vannithamby, Rath
• Primary Examiner(s): Ng, Christine
• Application Number:
  US15/886,730
• Publication Number:
  US 20180160450A1
• Time in Patent Office: 649 Days
• CPC Class Codes: H04B 7/2621 using frequency division multiple access [FDMA] H04B7/2615 takes precedence
• CPC Class Codes: H04L 1/0026 Transmission of channel quality indication
• CPC Class Codes: H04L 1/1825 Adaptation of specific ARQ protocol parameters according to transmission conditions
• CPC Class Codes: H04L 27/2607 Cyclic extensions
• CPC Class Codes: H04L 47/25 with rate being modified by the source upon detecting a change of network conditions
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/0032 Distributed allocation, i.e. involving a plurality of allocating devices, each making partial allocation
• CPC Class Codes: H04L 5/0051 of dedicated pilots, i.e. pilots destined for a single user or terminal
• 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 5/0078 Timing of allocation
• CPC Class Codes: H04L 5/14 Two-way operation using the same type of signal, i.e. duplex
• CPC Class Codes: H04L 5/1469 using time-sharing
• CPC Class Codes: H04L 5/22 using time-division multiplexing
• CPC Class Codes: H04L 69/161 Implementation details of TCP/IP or UDP/IP stack architecture; Specification of modified or new header fields
• CPC Class Codes: H04L 69/163 In-band adaptation of TCP data exchange; In-band control procedures
• CPC Class Codes: H04L 69/321 Interlayer communication protocols or service data unit [SDU] definitions; Interfaces between layers
• CPC Class Codes: H04L 69/324 in the data link layer [OSI layer 2], e.g. HDLC
• CPC Class Codes: H04L 69/326 in the transport layer [OSI layer 4] H04L69/16 takes precedence
• CPC Class Codes: H04W 16/14 Spectrum sharing arrangements between different networks
• CPC Class Codes: H04W 16/24 Cell structures
• CPC Class Codes: H04W 28/0205 : at the air interface dynamic wireless traffic scheduling H04W72/12
• CPC Class Codes: H04W 36/0069 : in case of dual connectivity, e.g. decoupled uplink/downlink
• CPC Class Codes: H04W 36/0083 : Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
• CPC Class Codes: H04W 40/30 : for proactive routing
• CPC Class Codes: H04W 52/0216 : using a pre-established activity schedule, e.g. traffic indication frame
• CPC Class Codes: H04W 52/0254 : detecting a user operation or a tactile contact or a motion of the device
• CPC Class Codes: H04W 72/02 : Selection of wireless resources by user or terminal
• 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 72/21 : 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 74/04 : Scheduled access hybrid access H04W74/02
• 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 80/06 : Transport layer protocols, e.g. TCP [Transport Control Protocol] over wireless transmission control protocol/Internet protocol [TCP/IP] or user datagram protocol [UDP] H04L69/16
• CPC Class Codes: H04W 84/12 : WLAN [Wireless Local Area Networks]
• 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 88/10 : adapted for operation in multiple networks, e.g. multi-mode access points
• CPC Class Codes: Y02D 30/50 : in wire-line communication networks, e.g. low power modes or reduced link rate
• CPC Class Codes: Y02D 30/70 : in wireless communication networks

Abstract

In embodiments, apparatuses, methods, and storage media may be described for monitoring channel quality of a radio link between a secondary evolved NodeB (SeNB) and a user equipment (UE) in a wireless communication network configured for dual connectivity. In embodiments, the UE may generate one or more indications of a channel quality of the SeNB-UE radio link and forward the indication to the SeNB. Based on the indication, the UE may receive a radio resource control (RRC) message from a master eNB (MeNB) related to the SeNB-UE radio link. Other embodiments may be claimed.

Claims

1. One or more non-transitory, computer-readable media having instructions that, when executed, cause a user equipment (“

UE”

) to;

identify a first set of radio link monitoring (“

RLM”

) parameters for RLM of a first cell to be provided by a master evolved node B (“

MeNB”

) and a second set of RLM parameters, different than the first set of RLM parameters, for RLM of a second cell to be provided by a secondary evolved node B (“

SeNB”

), the first set of RLM parameters to indicate a first timer value and a first constant value and the second set of RLM parameters to indicate a second timer value and a second constant value;

monitor a first link quality of the first cell based on the first set of RLM parameters; and

monitor a second link quality of the second cell based on the second set of RLM parameters.

2. The one or more non-transitory, computer-readable media of claim 1, wherein to monitor the link of the second cell, the instructions, when executed, cause the UE to:

determine that a number of received out-of-sync indications equals the second constant value; and

start a timer with the second timer value based on said determination that the number equals the second constant value.

3. The one or more non-transitory, computer-readable media of claim 2, wherein the second set of RLM parameters further indicates a third constant value and the instructions, when executed, further cause the UE to:

determine that a number of received in-sync indications equals the third constant value; and

stop the timer based on said determination that the number of received in-sync indications equals the third constant value.

4. The one or more non-transitory, computer-readable media of claim 1, wherein the instructions, when executed, further cause the UE to:

determine an average channel quality indicator of the link of the second cell, compare the average channel quality indicator to a threshold, and generate an in-sync indication or an out-of-sync indication based on said comparison.

5. The one or more non-transitory, computer-readable media of claim 1, wherein the instructions, when executed, further cause the UE to:

process a system information block (“

SIB”

) message, received from MeNB, to identify the second set of RLM parameters.

6. The one or more non-transitory, computer-readable media of claim 5, wherein the SIB message is a SIB2.

7. The one or more non-transitory, computer-readable media of claim 1, wherein the second set of RLM parameters is to indicate a plurality of constant values including the second constant value.

8. An apparatus to be used in a user equipment (“

UE”

), the apparatus comprising;

means for determining a first set of radio link monitoring (“

RLM”

) parameters for RLM of a first cell to be provided by a master evolved node B (“

MeNB”

) and a second set of RLM parameters, different than the first set of RLM parameters, for RLM of a second cell to be provided by a secondary evolved node B (“

SeNB”

), the first set of RLM parameters to indicate a first timer value and a first constant value and the second set of RLM parameters to indicate a second timer value and a second constant value;

means for monitoring a first link quality of the first cell based on the first set of RLM parameters; and

means for monitoring a second link quality of the second cell based on the second set of RLM parameters.

9. The apparatus of claim 8, further comprising:

means for determining that a number of received out-of-sync indications equals the second constant value; and

means for starting a timer with the second timer value based on said determination that the number equals the second constant value.

10. The apparatus of claim 9, further comprising:

means for determining that a number of received in-sync indications equals a third constant value; and

means for stopping the timer based on said determination that the number of received in-sync indications equals the third constant value.

11. The apparatus of claim 8, further comprising:

means for generating an in-sync indication or an out-of-sync indication based on comparison of an average channel quality indicator to a predetermined threshold.

12. The apparatus of claim 8, further comprising:

means for processing a system information block (“

SIB”

), received from the MeNB, to identify the second set of RLM parameters.

13. The apparatus of claim 8, wherein the second set of RLM parameters is to indicate a plurality of constant values including the second constant value.

14. One or more non-transitory, computer-readable media having instructions that, when executed, cause a master evolved node B (“

MeNB”

) to;

signal, to a user equipment (“

UE”

), a first set of radio link monitoring (“

RLM”

) parameters for RLM of a first cell to be provided by the MeNB and a second set of RLM parameters, different than the first set of RLM parameters, for RLM of a second cell to be provided by a secondary evolved node B (“

SeNB”

), the first set of RLM parameters to indicate a first timer value and a first constant value and the second set of RLM parameters to indicate a second timer value and a second constant value; and

processing a report related to monitoring of a link quality of the second cell based on the second set of RLM parameters.

15. The one or more non-transitory, computer-readable media of claim 14, wherein the report includes a handover request and the instructions, when executed, further cause the MeNB to:

initiate a handover procedure based on the handover request.

16. The one or more non-transitory, computer-readable media of claim 14, wherein, to signal the second set of RLM parameters, the MeNB is to transmit a system information block message.