On-site system frequency sharing with trunking systems using spread spectrum
First Claim
Patent Images
1. A communication system located within a service coverage area of trunked communication system, wherein the trunked communication system comprises:
- A) a plurality of communication resources, each resource having a frequency pair;
B) means for measuring a signal quality factor of at least one transmitting communication unit; and
,C) means for transferring the signal quality factor to at least one small-cell receiving means;
said communication system comprising at least one small-cell communication system having;
A) a plurality of small-cell communication units each with means for communicating in a time division duplex format on an indexed communication resource from an indexing table of communication resources for an index interval;
B) at least one small-cell base site having at least one transceiver and a resource controller with means for communicating in a time division duplex format on an indexed control resource from an indexing table of communication resources for an index interval;
C) means for receiving the signal quality factor from the trunked communication system;
D) means for comparing the signal quality factor with a threshold to produce a result; and
,E) means allocating an initial indexed communication resource from the indexing table of communication resources based at least in part upon the result to an at least one requesting small-cell communication unit of the plurality of communication units.
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Abstract
A way of allowing small, low-power communication units to reuse trunked system communication resources within the service coverage area of the larger trunked system without experiencing significant interference from the trunked system. The low power units (requestors and targets) avoid interference through spread spectrum transmissions.
140 Citations
14 Claims
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1. A communication system located within a service coverage area of trunked communication system, wherein the trunked communication system comprises:
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A) a plurality of communication resources, each resource having a frequency pair; B) means for measuring a signal quality factor of at least one transmitting communication unit; and
,C) means for transferring the signal quality factor to at least one small-cell receiving means; said communication system comprising at least one small-cell communication system having; A) a plurality of small-cell communication units each with means for communicating in a time division duplex format on an indexed communication resource from an indexing table of communication resources for an index interval; B) at least one small-cell base site having at least one transceiver and a resource controller with means for communicating in a time division duplex format on an indexed control resource from an indexing table of communication resources for an index interval; C) means for receiving the signal quality factor from the trunked communication system; D) means for comparing the signal quality factor with a threshold to produce a result; and
,E) means allocating an initial indexed communication resource from the indexing table of communication resources based at least in part upon the result to an at least one requesting small-cell communication unit of the plurality of communication units. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of re-using communication resources within a service coverage area of a trunked communication system, said trunked communication system having:
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A) a plurality of communications units; B) a plurality of communication resources, each resource having a frequency pair; C) at least one small-cell communication system, wherein the small-cell communication system has; i. a plurality of small-cell communication units each with means for performing time division duplex communication on an indexed communication resource of an indexing table of communication resources incremented at an index interval; ii. at least one small-cell base site having a small-cell resource controller; and iii. means for allocating an initial indexed communication resource of the indexing table of communication resources, said method comprising the steps of; A) monitoring an indexing control resource by a small-cell communication unit as the indexing control resource indexes through a table of indexing communication resources; B) transmitting a resource request from the small-cell communication unit to a means for allocating an initial indexed communication resource on the indexing control resource; C) receiving a resource grant of an initial indexed communication resource; D) tuning to the initial indexed communication resource; and
,E) indexing synchronously within the table of indexing communication resources from the initial indexed communication resource. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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Specification