Operator identification for co-existence on a shared communication medium

• US 10,651,987 B2
• Filed: 08/30/2016
• Issued: 05/12/2020
• Est. Priority Date: 08/31/2015
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Luo, Tao, Patel, Chirag, Gaal, Peter, Chande, Vinay, Valliappan, Nachiappan, Sadek, Ahmed
• Primary Examiner(s): Kassim, Khaled M
• Application Number:
  US15/251,093
• Publication Number:
  US 20170063504A1
• Time in Patent Office: 1,351 Days
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04W 16/14 Spectrum sharing arrangements between different networks
• CPC Class Codes: H04W 16/32 Hierarchical cell structures
• CPC Class Codes: H04W 72/0466 the resource being a scrambling code
• CPC Class Codes: H04W 72/12 Wireless traffic scheduling
• CPC Class Codes: H04W 84/042 Public Land Mobile systems, e.g. cellular systems
• CPC Class Codes: H04W 88/08 Access point devices

Abstract

Techniques for operator identification on a shared communication medium are disclosed. An access point may determine an operator identifier for an operator associated with an access point and configure a set of resource elements to carry an operator identifier reference signal embedded with the operator identifier. The access point may then transmit the operator identifier reference signal using the configured set of resource elements. An access terminal may receive signaling from an access point on a set of resource elements and monitor the signaling for an operator identifier reference signal. The access terminal may then determine an operator identifier for an operator associated with the access point based on the operator identifier reference signal.

Claims

1. A communication method, comprising:

receiving signaling from an access point;

monitoring the signaling for an operator identifier reference signal, wherein the monitoring comprises;

selecting a set of resource elements associated with a preferred operator; and

measuring a signaling energy associated with the selected set of resource elements without decoding an operator identifier for an operator associated with the access point; and

determining whether the operator is the preferred operator based on a degree of correlation between a preferred operator identifier and the measurement of the signaling energy,

wherein the monitoring comprises descrambling the signaling on the set of resource elements based on the preferred operator identifier and a cell identifier associated with the access point.

2. The method of claim 1, wherein the operator identifier corresponds to a Public Land Mobile Network Identifier (PLMN ID).

3. The method of claim 1, wherein the set of resource elements forms part of an Enhanced Discovery Reference Signal (eDRS) subframe.

4. The method of claim 1, further comprising:

acquiring one or more synchronization signals from the access point; and

determining a cell identifier associated with the access point based on the acquired synchronization signals;

wherein the selecting of the set of resource elements is further based on the determined cell identifier.

5. The method of claim 1, wherein the monitoring comprises:

identifying the set of resource elements as being scheduled for another reference signal; and

monitoring the scheduled set of resource elements for the operator identifier reference signal.

6. The method of claim 5, wherein the other reference signal corresponds to a Channel State Information Reference Signal (CSI-RS).

7. The method of claim 1, wherein the set of resource elements comprises at least eight resource elements in a corresponding resource block.

8. A communication apparatus, comprising:

at least one transceiver configured to receive signaling from an access point;

at least one processor; and

at least one memory coupled to the at least one processor, the at least one processor and the at least one memory being configured to;

monitor the signaling for an operator identifier reference signal, wherein to monitor the signaling, the at least one processor and the at least one memory are further configured to select a set of resource elements associated with a preferred operator and measure a signaling energy associated with the selected set of resource elements without decoding an operator identifier for an operator associated with the access point, and

determine whether the operator identifier is the preferred operator based on a degree of correlation between a preferred operator identifier and the measurement of the signal energy,

wherein the at least one processor and the at least one memory are configured to descramble the signaling on the set of resource elements based on the preferred operator identifier and a cell identifier associated with the access point.

9. The apparatus of claim 8, wherein the operator identifier corresponds to a Public Land Mobile Network Identifier (PLMN ID).

10. The apparatus of claim 8, wherein the at least one processor and the at least one memory are configured to:

identify the set of resource elements as being scheduled for another reference signal; and

monitor the scheduled set of resource elements for the operator identifier reference signal.