Method for more efficient multi transaction data transmission

• US 5,274,842 A
• Filed: 01/30/1992
• Issued: 12/28/1993
• Est. Priority Date: 01/30/1992
• Status: Expired due to Fees

• Current Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Sasuta, Michael D.
• Primary Examiner(s): Eisenzopf, Reinhard J.
• Assistant Examiner(s): SOBUTKA, PHILIP
• Application Number:
  US07/828,091
• Time in Patent Office: 698 Days
• Field of Search: 455/34.1, 455/54.1, 455/54.2, 455/57.1, 455/67.1, 455/68, 455/69, 455/56.1, 455/34.2, 358/439, 358/406, 358/405, 358/434, 358/468, 340/825.44, 340/825.52
• US Class Current: 455/509
• CPC Class Codes: H04L 1/1607 Details of the supervisory signal
• CPC Class Codes: H04W 28/06 Optimizing the usage of the radio link, e.g. header compression, information sizing , discarding information system modifying transmission characteristic according to link quality by modifying frame length H04L1/0007; dynamic adaptation of the packet size for flow control or congestion control H04L47/365
• CPC Class Codes: H04W 84/08 Trunked mobile radio systems

Abstract

In a trunked communication system that has the capabilities of receiving facsimile transmissions from a communication unit, a method to more efficiently utilize communication resources can be achieved by the following. Once a communication resource allocator has allocated a communication resource to a communication unit for a predetermined period of time, that communication unit transmits at least a portion of a multiple transaction data, which may be a facsimile, to the communication resource allocator. Once the communication resource allocator accurately receives the at least a portion of the multiple transaction data, it transmits an acknowledgement signal to the communication unit. From the acknowledgement signal, the communication unit determines the signal strength of the transmission and also the transmission duration. From these parameters, the communication unit then determines whether at least a second portion of the multiple transaction data can be transmitted within the remaining portion of the allocated predetermined period of time.

Claims

1. In a trunking communication system that comprises a plurality of communication units, a limited number of communication resources that are transceived via a predetermined number of repeaters, and a communication resource allocator that allocates the limited number of communication resources among the plurality of communication units, wherein, from time to time, a communication unit of the plurality of communication units transmits multiple transaction data via an allocated communication resource, and wherein the communication unit is allocated the allocated communication resource for a predetermined period of time, a method for the communication unit to more efficiently utilize the allocated communication resource to transmit the multiple transaction data during the predetermined period of time, the method comprises the steps of:

a) upon allocation of a communication resource to the communication unit and upon receipt of said predetermined period of time, transmitting a first portion of the multiple transaction data to the communication resource allocator;

b) receiving an acknowledgement that said first portion of the multiple transaction data was received by the communication resource allocator;

c) determining signal strength of the transmission of said first portion of the multiple transaction data;

d) calculating transmission duration of the first portion of the multiple transaction data; and

e) determining, based upon the transmission duration, the predetermined period of time, and the signal strength, remaining transmission time; and

f) transmitting at least a second portion of the multiple transaction data to the communication resource allocator when said at least a second portion of the multiple transaction data exists and when the remaining transmission time is sufficient to transmit said at least the second portion of the multiple transaction data to the communication resource allocator.

2. In the method of claim 1, wherein the determining of the signal strength of step (c) further comprises storing signal strength information of previously transmitted portions of the multiple transaction data to produce a record of signal strengths.

3. The method of claim 2 further comprises receiving additional signal strength information from the communication resource allocator based upon quality of the received at least a portion of the multiple transaction data.

4. In the method of claim 2, the determining of transmission duration of step (d) further comprises calculating transmission time based upon a time difference between when the at least a portion of the multiple transaction data began transmitting and when the acknowledgement was received.

5. The method of claim 4 further comprises storing the transmission duration of previously transmitted portions of the multiple transaction data to produce a record of transmission durations.

6. In the method of claim 5, the determining of whether the second portion of the multiple transaction data is transmittable of step (e) further comprises calculating, based upon the record of transmission durations and the record of signal strengths, whether sufficient time remains in the predetermined period of time to transmit the second portion of the multiple transaction data.

7. The method of claim 6 further comprises terminating the allocation of the communication resource when there is insufficient time to transmit the second portion of the multiple transaction data.

8. The method of claim 1 further comprises terminating the allocation of the communication resource when the second portion of the multiple transaction data does not exist.

9. In a trunking communication system that comprises a plurality of communication units, a limited number of communication resources that are transceived via a predetermined number of repeaters, and a communication resource allocator that allocates the limited number of communication resources among the plurality of communication units, wherein, from time to time, a communication unit of the plurality of communication units transmits multiple transaction data via an allocated communication resource, and wherein the communication unit is allocated the allocated communication resource for a predetermined period of time, an improved communication unit that more efficiently utilize the allocated communication resource to transmit the multiple transaction data during the predetermined period of time, the improvement comprises:

transmission means for transmitting a first portion of the multiple transaction data to the communication resource allocator;

receiving means for receiving an acknowledgement that said first portion of the multiple transaction data was received by the communication resource allocator;

signal strength determination means, operably coupled to the transmission means, for determining the signal strength of the transmission of said first portion of the multiple transaction data;

transmission duration determination means, operably coupled to the transmission means and the receiving means, for calculating transmission duration of said first portion of the multiple transaction data; and

subsequent transmission determination means, operably coupled to the signal strength determination means and the transmission duration determination means, for determining whether sufficient transmission time remains of said predetermined period of time to transmit at least a second portion of the multiple transaction data.

10. The improved communication unit of claim 9 further comprises time storage means, operably coupled to the subsequent transmission means, for storing the predetermined period of time and remaining portions of the predetermined period of time.

11. In a trunking communication system that comprises a plurality of communication units, a limited number of communication resources that are transceived via a predetermined number of repeaters, and a communication resource allocator that allocates the limited number of communication resources among the plurality of communication units, wherein, from time to time, a communication unit of the plurality of communication units transmit multiple transaction data via an allocated communication resource, and wherein the communication unit is allocated the allocated communication resource for a predetermined period of time, a method for the trunking communication system to more efficiently utilize the allocated communication resource to transmit the multiple transaction data during the predetermined period of time, the method comprises the steps of:

a) transmitting said predetermined period of time from the communication resource allocator to the communication unit;

b) transmitting a first portion of the multiple transaction data from the communication unit to the communication resource allocator;

c) transmitting an acknowledgement that said first portion of the multiple transaction data was received by the communication resource allocator to the communication unit;

d) within the communication unit, determining signal strength of the transmission of said first portion of the multiple transaction data;

e) within the communication unit, determining transmission duration of said first portion of the multiple transaction data;

f) within the communication unit, determining, based upon the transmission duration, the predetermined period of time, and the signal strength, remaining transmission time; and

f) transmitting, by the communication unit, at least a second portion of the multiple transaction data to the communication resource allocator when said at least a second portion of the multiple transaction data exists and when the remaining transmission time is sufficient to transmit said at least the second portion of the multiple transaction data to the communication resource allocator.

12. The method of claim 11 further comprises transmitting addition signal strength information from the communication resource allocator to the communication unit.