Uplink channel reservation with conflicting wireless communications

• US 10,333,656 B2
• Filed: 05/14/2016
• Issued: 06/25/2019
• Est. Priority Date: 05/14/2015
• Status: Active Grant

• Current Assignee: Cable Television Laboratories Incorporated
• Original Assignee: Cable Television Laboratories Incorporated
• Inventors: Andreoli-Fang, Jennifer, Babaei, Alireza
• Primary Examiner(s): Divito, Walter J
• Assistant Examiner(s): Luo, Anthony
• Application Number:
  US15/154,960
• Publication Number:
  US 20160338097A1
• Time in Patent Office: 1,137 Days
• CPC Class Codes: H04L 1/0058 Block-coded modulation
• CPC Class Codes: H04L 1/0061 Error detection codes
• CPC Class Codes: H04L 1/08 by repeating transmission, e.g. Verdan system H04L1/1858 and H04L1/189 take precedence
• CPC Class Codes: H04L 1/1825 Adaptation of specific ARQ protocol parameters according to transmission conditions
• CPC Class Codes: H04L 1/1832 Details of sliding window management
• CPC Class Codes: H04L 1/187 Details of sliding window management
• CPC Class Codes: H04L 1/1893 Physical mapping arrangements physical resource mapping in general H04L5/00
• CPC Class Codes: H04L 5/0055 Physical resource allocation for ACK/NACK for physical mapping arrangements in ARQ protocols H04L1/1861
• CPC Class Codes: H04W 72/02 Selection of wireless resources by user or terminal
• 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 74/006 in the downlink, i.e. towards the terminal
• CPC Class Codes: H04W 74/08 Non-scheduled access, e.g. ALOHA hybrid access H04W74/02
• CPC Class Codes: H04W 74/0808 using carrier sensing, e.g. carrier sense multiple access [CSMA]
• CPC Class Codes: H04W 84/042 Public Land Mobile systems, e.g. cellular systems
• CPC Class Codes: H04W 88/06 adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals

Abstract

Systems and methods presented herein provide for channel reservation for a wireless telephony system operating in an RF band with a wireless system comprising a conflicting wireless technology. One method is operable with an eNodeB. The method includes assigning an ID (e.g., a PN sequence) to a user equipment (UE) operating in the RF band, processing a scheduling request for uplink (UL) data from the UE, and granting a time and a frequency for the UE to transmit the UL data. The method also includes waiting until the UE performs a Listen Before Talk (LBT) operation to determine whether the granted time and frequency is occupied by another wireless system employing a different wireless technology. The method also includes transmitting the ID to the UE to reserve the granted time and frequency when unoccupied by the other wireless system, and processing the UL data from the UE.

Claims

1. A method operable with an eNodeB operating in a radio frequency (RF) band comprising a conflicting wireless technology, the method comprising:

assigning an identification (ID) to a user equipment (UE) operating in the RF band;

receiving a scheduling request for uplink (UL) data from the UE;

granting to the UE a time and a frequency for the UE to transmit the UL data based on the received scheduling request;

determining, after performance of a first Listen Before Talk (LBT) operation by the UE, that the granted time and frequency are occupied by another wireless system employing a different wireless technology;

starting a timer, within which the UE performs a second LBT operation;

transmitting, prior to expiration of the timer and after reception of a clear channel assessment based on the second LBT operation, the assigned ID to the UE to reserve the granted time and frequency when unoccupied by the other wireless system; and

processing the UL data from the UE.

2. The method of claim 1, wherein:

the other wireless system is a WiFi system.

3. The method of claim 1, further comprising:

determining a quality of service (QoS) of the UE;

establishing the timer based on the QoS; and

dropping the UL data when the timer expires to process another scheduling request for UL data from the UE.

4. The method of claim 1, wherein:

the eNodeB communicates to the UE via Long Term Evolution (LTE) communications.

5. The method of claim 1, wherein:

the ID is a pseudorandom number sequence.

6. A method operable with a user equipment (UE) operating in a radio frequency (RF) band comprising a conflicting wireless technology, the method comprising:

transmitting a scheduling request to an eNodeB for uplink (UL) data from the UE;

processing a time and frequency grant from the eNodeB for the UE to transmit the UL data;

performing a first Listen Before Talk (LBT) operation;

determine, from the first LBT operation, that the granted time and frequency are occupied by another wireless system employing a different wireless technology operating in the RF band;

executing a second LBT operation to verify that the granted time and frequency are not occupied by the other wireless system;

sending a clear channel acknowledgment to the eNodeB based the second LBT operation;

receiving an identification (ID), from the eNodeB, reserving the granted time and frequency; and

broadcasting, after the step of receiving, the UL data to the eNodeB.

7. The method of claim 6, further comprising:

discarding the UL data at the direction of the eNodeB based on a timer established by the eNodeB.

8. The method of claim 6, wherein:

the other wireless system is a WiFi system.

9. The method of claim 6, wherein:

the ID is a pseudorandom number sequence.

10. The method of claim 6, wherein:

the UE broadcasts the UL data to the eNodeB via Long Term Evolution (LTE) communications.

11. An eNodeB operating in a radio frequency (RF) band comprising a conflicting wireless technology, the eNodeB comprising:

a processor operable to (i) assign an identification (ID) to a user equipment (UE) operating in the RF band, (ii) process a scheduling request for uplink (UL) data from the UE, (iii) grant a time and a frequency for the UE to transmit the UL data, (iv) start a timer after providing to the UE the UL grant, and (v) receive a clear channel acknowledgement from the UE based on an a Listen Before Talk (LBT) operation performed by the UE to determine, before an expiration of the timer, whether the granted time and frequency are occupied by another wireless system employing a different wireless technology; and

an interface operable to transmit the ID to the UE to reserve the granted time and frequency when unoccupied by the other wireless system, and to receive the UL data from the UE on the granted time and frequency.

12. The eNodeB of claim 11, wherein:

the other wireless system is a WiFi system.

13. The eNodeB of claim 11, wherein:

the processor is further operable to determine a quality of service (QoS) of the UE, to establish the timer based on the QoS, and to drop the UL data when the timer expires to process another scheduling request for UL data from the UE.

14. The eNodeB of claim 11, wherein:

the eNodeB communicates to the UE via Long Term Evolution (LTE) communications.

15. The eNodeB of claim 11, wherein:

the ID is a pseudorandom number sequence.