United States Patent [19] [li] Patent Number: 4,831,373
Hess [45] Date of Patent: May 16,1989
[54] METHOD FOR DYNAMICALLY
ALLOCATING DATA CHANNELS ON A
TRUNKED COMMUNICATION SYSTEM
[75] Inventor: Garry C. Hess, Hanover Park, 111.
[73] Assignee: Motorola, Inc., Schaumburg, 111.
[21] Appl. No.: 44,380
[22] Filed: Apr. 30, 1987
[51] Int. Q.4 H04Q7/00
[52] U.S. CI 340/825.03; 340/825.44;
455/17; 455/33
[58] Field of Search 340/825.03, 825.01,
340/825.44; 455/17, 33, 34, 54; 370/95; 371/33
[56] References Cited
U.S. PATENT DOCUMENTS
4,012,597 3/1977 Lynk, Jr. et al 455/53
4,352,183 9/1982 Davis et al 371/33
4,551,852 11/1985 Grauel et al 455/54
4,553,262 11/1985 Coe 455/15
4,556,972 12/1985 Chan et al 370/95
4,573,206 2/1986 Grauel et al 455/33
4,574,163 3/1986 Zato 379/62
4,578,815 3/1986 Persinotti 455/33
4,593,389 6/1986 Wurzburg et al 370/110.1
4,609,778 9/1986 Franklin et al 379/243
4,698,805 10/1987 Sasuta et al 455/17
Primary Examiner—Donald J. Yusko
Attorney, Agent, or Firm—Thomas G. Berry; Wayne J.
Egan
[57] ABSTRACT
Disclosed is a method to dynamically allocate a number of data channels on a trunked radio system (100). The data activity is monitored during a predetermined time interval. If activity is above predetermined maximum, an additional channel may be reserved for data use. Conversely, if data traffic is low, a data channel may be reallocated for voice message use. Moreover, should the amount of data traffic among the available data channels be unbalanced, the present method contemplates reassigning subscriber units (114 or 116) to the available data channels to balance the data traffic load, thereby providing superior access time and system performance.
10 Claims, 6 Drawing Sheets
