US 5,473,605 A · Method for a communication unit to participate in multiple calls

Abstract

While participating in a group call on a first wireless communication resource 114, senior members 104-107 of a communication group 108 can initiate a semi-private call. A central controller 110 allocates a second wireless communication resource 115 for the semi-private call. Furthermore, executive members 106-107 can initiate an executive call to be established on a third wireless communication resource 116. Executive members can participate in the executive call, the semi-private call, and the group call, whereas senior members can participate in the semi-private call and the group call. Junior members 101-103, normally allowed to participate only in the group call, can be selected by senior members to temporarily participate in the group call and the semi-private call.

Claims12

Dependent claims

In a wireless communication system that includes a plurality of communication units arranged into at least one communication group, a plurality of wireless communication resources, and a central controller that allocates the plurality of wireless communication resources among the plurality of communication units, a method for senior members of the at least one communication group to participate in a group call for the at least one communication group and a semi-private call simultaneously, the method comprising the steps of:

a) participating in the group call on a first wireless communication resource of the plurality of wireless communication resources, the first wireless communication resource comprising a first time slot on a radio frequency carrier;
b) initiating, by a senior member of the senior members, the semi-private call for at least one other senior member of the senior members;
and
c) participating, by the senior member and the at least one other senior member, in the semi-private call and the group call when the semi-private call has been established on a second wireless communication resource of the plurality of wireless communication resources, the second wireless communication resource comprising a second time slot on the radio frequency carrier.

1 more element

In a wireless communication system that includes a plurality of communication units arranged into at least one communication group, a plurality of wireless communication resources, and a central controller that allocates the plurality of wireless communication resources among the plurality of communication units, a method for the central controller to establish a group call for the at least one communication group and a semi-private call for senior members of the at least one communication group simultaneously, the method comprising the steps of:

a) receiving a group call request from a communication unit of the at least one communication group;
b) establishing the group call on a first wireless communication resource of the plurality of wireless communication resources, the first wireless communication resource comprising a first time slot on a radio frequency carrier;
c) receiving a semi-private call request from a senior member of the senior members;
and
d) establishing a semi-private call on a second wireless communication resource of the plurality of wireless communication resources, the second wireless communication resource comprising a second time slot on the radio frequency carrier.

2 more elements

a) establishing, by the central controller, the group call on a first wireless communication resource of the plurality of wireless communication resources, the first wireless communication resource comprising a first time slot on a radio frequency carrier;
b) participating, by the senior members and junior members of the at least one communication group, in the group call;
c) initiating, by a senior member of the senior members, a semi-private call for at least one other senior member of the senior members;
d) establishing, by the central controller, the semi-private call on a second wireless communication resource of the plurality of wireless communication resources, the second wireless communication resource comprising a second time slot on the radio frequency carrier;
and
e) participating, by the senior member and the at least one other senior member, in the semi-private call and the group call.

3 more elements

Dependencies are inferred from the claim text.

Method for a communication unit to participate in multiple calls

Life of this patent

Method for a communication unit to participate in multiple calls

Life of this patent

Abstract

Claims12