( 6 of 9 ) |
United States Patent | 5,465,386 |
Barnes , et al. | November 7, 1995 |
A land mobile transmission trunked communication system is provided with an enhanced control signal protocol. The land mobile transmission trunked communication system includes a plurality of transceivers for transmitting and receiving transmission trunked radio communications over one or more radio channels. The transmission trunked radio communications comprises an information signal having either voice information, data information, or both, and a control signal. The transceivers communicate with a selected one of a plurality of repeaters to establish transmission trunked radio communications on one of the preassigned set of the radio channels between the repeater and one or more transceivers. The enhanced signaling protocol and switching protocol are especially adapted for communicating control signals in the subaudio band to interconnect a plurality of transmission trunked communication systems into a wide area network. The enhanced switching and signaling protocol provide an expanded feature set of radio communication capabilities.
Inventors: | Barnes; Keith W. (Waseca, MN), Bauman; Donald R. (Waseca, MN), Brace; Howard N. (Waseca, MN), Keefer; Philip A. (Waseca, MN), Mihelich; Michael E. (Waseca, MN) |
Assignee: |
E.F. Johnson Company
(Waseca,
MN)
|
Appl. No.: | 08/300,930 |
Filed: | September 2, 1994 |
Application Number | Filing Date | Patent Number | Issue Date | ||
903050 | Jun., 1992 | ||||
716757 | Jun., 1991 | Oct., 1992 | |||
332675 | Mar., 1989 | ||||
Current U.S. Class: | 455/15 ; 455/518 |
Current International Class: | H04Q 7/28 (20060101); H04B 007/14 () |
Field of Search: | 455/15,17,33.1,34.1,34.2,54.1,54.2 379/59,60,63 340/825.03,825.44 |
Re32789 | November 1989 | Lynk, Jr. |
4029901 | June 1977 | Whitney et al. |
4092600 | May 1978 | Zimmerman |
4317218 | February 1982 | Perry |
4347625 | August 1982 | Williams |
4398289 | August 1983 | Schoute |
4399555 | August 1983 | MacDonald |
4517561 | May 1985 | Burke et al. |
4517669 | May 1985 | Freeburg |
4525832 | June 1985 | Miyad |
4525837 | June 1985 | Tan |
4534061 | August 1985 | Ulug |
4553262 | November 1985 | Coe |
4565903 | April 1986 | Schiller |
4578815 | March 1986 | Persinotti |
4603418 | July 1986 | Townsend |
4612415 | September 1986 | Zdunek |
4636791 | January 1987 | Burke et al. |
4646345 | February 1987 | Zdunek et al. |
4649567 | March 1987 | Childress |
4658435 | April 1987 | Childress |
4670905 | June 1987 | Sandvos |
4670906 | June 1987 | Thro |
4672608 | June 1987 | Ball et al. |
4672657 | June 1987 | Dershowitz |
4677656 | June 1987 | Burke et al. |
4692945 | September 1987 | Zdunek |
4698805 | October 1987 | Sasuta |
4701944 | October 1987 | Howard |
4712229 | December 1987 | Nakamura |
4716407 | December 1987 | Borras et al. |
4718108 | January 1988 | Davidson et al. |
4723264 | February 1988 | Sasuta |
4730187 | March 1988 | Menich |
4775998 | October 1988 | Felix et al. |
4817190 | March 1989 | Comroe et al. |
4831373 | May 1989 | Hess |
4833701 | May 1989 | Comroe et al. |
4835731 | May 1989 | Nazarenko et al. |
4843633 | June 1989 | Menich |
4870408 | September 1989 | Zdunek et al. |
4870699 | September 1989 | Garner et al. |
4876738 | October 1989 | Selby |
4887265 | December 1989 | Felix |
4903321 | February 1990 | Hall et al. |
4905234 | February 1990 | Childress et al. |
4905302 | February 1990 | Childress et al. |
4905305 | February 1990 | Garner et al. |
4926496 | May 1990 | Cole et al. |
4939746 | July 1990 | Childress |
4972460 | November 1990 | Sasuta |
5014345 | May 1991 | Comroe et al. |
5020130 | May 1991 | Grube et al. |
5020132 | May 1991 | Nazarenk |
5054068 | October 1991 | Hess et al. |
5054109 | October 1991 | Blackburn |
5077828 | December 1991 | Waldroup |
5125102 | June 1992 | Childress et al. |
5128930 | July 1992 | Nazarenko et al. |
5133080 | July 1992 | Borras |
5172396 | December 1992 | Rose, Jr. et al. |
5175866 | December 1992 | Childress et al. |
5212724 | May 1993 | Nazarenko et al. |
5265093 | November 1993 | Dissosway et al. |
5274837 | December 1993 | Childress et al. |
5274838 | December 1993 | Childress et al. |
Grindahl, M., "Automatic Communications System", Proceedings of the Annual Conf. of the IEEE Vehicular Technology Society, 15 Sep. 1980, pp. 1-5. . "E. F. Johnson Clear Channel LTR Application Note", Part No. 009-0001-020 (Rev. 5 Oct. 1988).. |