US 8537757

US Patent 8537757, titled "Adaptive call admission control for use in a wireless communication system," was issued on September 17, 2013, from an application filed on June 1, 2012. The original assignee was WiLAN Inc, and the most recently listed assignee in the provided information is WI-LAN INC. as of June 14, 2017, after a brief assignment to Quarterhill Inc. The inventors are Eli Arviv, Brian Spinar, Kenneth L. Stanwood, David Gazelle, Ofer Zimmerman, Penny Efraim, Yair Bourlas, and Sheldon L. Gilbert. The patent's legal status is "Expired - Fee Related."

The abstract describes the invention as relating to communication systems and methods for implementing adaptive call admission control (CAC). It explains that adaptive CAC determines which connections between a Customer Premise Equipment (CPE) and a base station are allowed. When coupled with precedence, CAC can also determine which connections are suspended if available bandwidth falls below committed levels. The abstract notes that multiple techniques for selecting connections for suspension are disclosed, including suspending connections through an affected CPE until demand is met, randomly or round-robin suspending connections from the entire set, and using precedence priority levels.

A plain-language overview of the independent claims, based on the "SUMMARY OF THE INVENTION" section (as the full claims text was not provided), is as follows:

Independent Claim 1 (System Aspect - Overview):
This claim describes a communication system designed to manage new and existing connections between a base station and multiple CPEs. Both the base station and CPEs can adjust the robustness of their transmission modulation (PHY mode). The system includes a first CPE with a modem having a current and planned PHY mode, a second CPE with a similar modem, and a base station with a modem communicating with both CPEs. A Call Admission Control (CAC) module in the system determines whether to allow a new connection. This decision is based on comparing the total available "air link line rate" (derived from a reference PHY mode) with the total "bandwidth commitment value" from all CPEs (based on their planned PHY modes).

Independent Claim 2 (Method Aspect - Overview):
This claim outlines a method for managing connection admissions in a wireless communication system between a base station and its associated CPEs, including a CPE requesting a new connection. The method involves:

1. Receiving a new connection request from a CPE.
2. Calculating the total "hard bandwidth commitments" for all existing and the new connection, based on the planned PHY mode for each.
3. Determining an "air link line rate" for the system based on a reference PHY mode.
4. If the air link line rate exceeds the total planned hard bandwidth commitments, the new connection is accepted.
5. If accepted, a second calculation of hard bandwidth commitments for existing connections is performed, this time based on their current PHY modes.
6. If the air link line rate still exceeds this second set of commitments, air link resources are allocated to the new connection.
7. Otherwise, if additional air link resources are available, they are allocated to the new connection.
8. If no additional resources are available, at least one existing connection between the base station and associated CPEs is suspended.
9. If the initial comparison (step 4) found that the air link line rate did not exceed the planned hard bandwidth commitments, the new connection is denied.

No specific docket information for US Patent 8537757 in 2026 was found in the CAFC dockets.