# US 5,711,010 A · Method of establishing access to secondary communication resources in a communication system

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- Number: US 5,711,010 A
- Document ID: US5711010A
- Status: Granted
- Kind: A
- Application number: 08/455,383
- Filed: 1995-05-31
- Granted: 1998-01-20
- Earliest claimed: 1995-05-31
- Assignees: Motorola, Inc.
- Inventors: Marc C. Naddell; Gary W. Grube; Brian K. Bunkenburg
- Web page: https://patentgrep.com/patent/US5711010A

## CPC

- H04W 84/08: Trunked mobile radio systems
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)

## Abstract

In a radio communication system, a method of establishing access to a secondary communication resource includes the steps of identifying a need for such a resource, and requesting access to that resource while still engaged in a first communication. In particular, a first communication unit, being presently engaged in a first communication on a primary communication resource, allows the user to identify a present need for a secondary communication resource for the secondary communication resource. The communication unit is further made capable of requesting, during the first communication, access to the secondary communication resource.

## Claims

### Claim 1

In a communication system including a central controller and at least a first communication unit, a method of assigning to the first communication unit, while said first communication unit is presently participating in a first communication on a primary communication resource, a secondary communication resource different from said primary communication resource, to allow the first communication unit to participate in a desired communication immediately after the secondary resource becomes available and upon termination of the first communication, the method comprising the central controller performed steps of:
identifying, while the first communication is still active, a request, from the first communication unit for the secondary communication resource;
identifying when the resource becomes available;
reserving, while the first communication is still active, the secondary resource for the first communication unit when the secondary communication resource becomes available; and
assigning the secondary resource to the first communication unit when the first communication is terminated.

### Claim 2 (depends on 1)

The method of claim 1, further comprising the step of placing the request in a request queue when the second resource is unavailable.

### Claim 3 (depends on 2)

The method of claim 2, further comprising the step of identifying a priority level for the first communication unit.

### Claim 4 (depends on 3)

The method of claim 3, further comprising the step of adjusting a position of the request in the request queue based, at least in part, on the priority level.

### Claim 5 (depends on 4)

The method of claim 4, wherein the step of reserving involves starting a resource hold timer.

### Claim 6 (depends on 5)

The method of claim 5, further comprising the steps of:
identifying, at expiration of the resource hold timer, that a second communication unit is temporarily assigned a reservation for the secondary communication resource; and
reassigning the reservation so that the first communication unit is assigned the secondary resource when the first communication is terminated.

### Claim 7 (depends on 6)

The method of claim 6, wherein the step of identifying a request from the first communication unit involves identifying a request command from the first communication unit asserted by an input mechanism coupled thereto.

### Claim 8 (depends on 7)

The method of claim 7, wherein said input mechanism is a keypad and said request command is a keypad asserted command.

### Claim 9 (depends on 1)

The method of claim 1, further comprising the step of identifying a priority level for the first communication unit.

### Claim 10 (depends on 1)

The method of claim 1, wherein the step of reserving involves indefinitely allocating the secondary communication resource to the first communication unit.

### Claim 11 (depends on 1)

The method of claim 1, wherein the step of reserving involves starting a resource hold timer.

### Claim 12 (depends on 11)

The method of claim 11, further comprising the steps of;
identifying, at expiration of the resource hold timer, that a second communication unit is temporarily assigned a reservation for the secondary communication resource; and
reassigning the reservation so that the first communication unit is assigned the secondary resource when the first communication is terminated.

### Claim 13 (depends on 12)

The method of claim 12, further comprising the step of placing the request in a request queue when the second resource is unavailable.

### Claim 14 (depends on 1)

The method of claim 1, wherein the step of identifying a request from the first communication unit involves identifying a request command from the first communication unit asserted by an input mechanism coupled thereto.

### Claim 15 (depends on 14)

The method of claim 14, wherein said input mechanism is a keypad and said request command is a keypad asserted command.