Browse Prior Art Database

ADJACENT SITE REQUEST

IP.com Disclosure Number: IPCOM000006886D
Original Publication Date: 1993-Jun-01
Included in the Prior Art Database: 2002-Feb-08
Document File: 3 page(s) / 163K

Publishing Venue

Motorola

Related People

Laura Sue Bennett: AUTHOR [+2]

Abstract

In today's wide area tmnked radio systems that use dynamic site assignment, when a radio user or dispatcher makes a talkgroup call, the radio user or dispatcher may have to wait for all sites that contain members of the t&group to each have a channel available. This could. result in long delays. This would be especially true if the talkgroup was a low priority talkgroup and the system had many remote sites with only a few channels at each site. The radio user/dispatcher may only want to con- tact those radio units that are in close proximity to the radio user. (For example, the user needs equipment or assistance from those who can provide it most quickly.) The radio user/dispatcher would, in this case, not want to contact every radio unit in the talkgroup. Another problem is that resources are being used that are not really needed. This happens sometimes with talkgroup calls. A radio user wishes to reach only a subset (by location) of the members in a talkgroup. But when the radio user makes a talkgroup call, all talkgroup mem- bers are involved and therefore resources (channels) are used that arc not needed. Using resources that are not needed decreases system performance, especially in a system that has many remote sites with only a few chan- nels at each site.

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MO-LA INC. Technical Developments Volume19 June 1993

ADJACENT SITE REQUEST

by Laura Sue Bennett and William August Felderman

  In today's wide area tmnked radio systems that use dynamic site assignment, when a radio user or dispatcher makes a talkgroup call, the radio user or dispatcher may have to wait for all sites that contain members of the t&group to each have a channel available. This could. result in long delays. This would be especially true if the talkgroup was a low priority talkgroup and the system had many remote sites with only a few channels at each site. The radio user/dispatcher may only want to con- tact those radio units that are in close proximity to the radio user. (For example, the user needs equipment or assistance from those who can provide it most quickly.) The radio user/dispatcher would, in this case, not want to contact every radio unit in the talkgroup. Another problem is that resources are being used that are not really needed. This happens sometimes with talkgroup calls. A radio user wishes to reach only a subset (by location) of the members in a talkgroup. But when the radio user makes a talkgroup call, all talkgroup mem- bers are involved and therefore resources (channels) are used that arc not needed. Using resources that are not needed decreases system performance, especially in a system that has many remote sites with only a few chan- nels at each site.

  The Adjacent Site Request feature will allow a radio user or dispatcher to initiate a special type of call request where the only sites that need to be involved in the call are those sites that contain radio units in the radio user's talkgroup and arc also adjacent to the radio user's site. When the radio user or dispatcher makes an Adjacent Site Request, the request will be sent to the fixed end controller. The fixed end controller would then look for channels at sites that

* are adjacent to that radio user's site and contain talkgroup members
* are the radio user's own site

Once the fixed end controller finds the channels that tit the above requirements, the call can then be made.

As stated before, this feature could be used by a

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radio user or a dispatcher. Consider the following sce- nario where a radio user would use this feature:

A radio user is in urgent need of maintenance equipment. Since the radio user needs the cquip- ment in a hurry, the radio user decides to con- tact only those radio units in his talkgroup who are in the immediate area. The radio user selects "adjacent site request" from the menu and his call is granted immediately because there are no adjacent sites that arc busied (see the dia- gram on the following page). Using the "adja- cent site request" was a valuable choice because there were non-adjacent sites with talkgroup members that did not have any available chan- nels and therefore the radio user would have been busied if he/she had made a regular talkgroup call.

  Of course the busy override option could have been used...