US 6,983,152 B2 | ||
Portable telephone system capable of simultaneously carrying out high speed communication and low speed communication by one time slot and communication method therefor | ||
Yoshio Itagaki, Tokyo (Japan) | ||
Assigned to NEC Corporation, Tokyo (Japan) | ||
Filed on Jan. 17, 2002, as Appl. No. 10/46,778. | ||
Claims priority of application No. 2001-008371 (JP), filed on Jan. 17, 2001. | ||
Prior Publication US 2002/0094818 A1, Jul. 18, 2002 | ||
Int. Cl. H04Q 7/20 (2006.01) |
U.S. Cl. 455—452.1 | 17 Claims |
1. A portable telephone system including a base station and a mobile station which communicate with each other by using one
time divisional time slot including a high speed channel and a low speed channel, wherein a first communication requiring
said high speed channel by a first calling party from said base station to said mobile station and a second communication
not requiring said high speed channel by a second party from said base station to said mobile station are carried out simultaneously
by using said high speed channel and said low speed channel, respectively, said base station comprising:
means determining whether or not said high speed channel is empty, when a new service is requested from said base station
to said mobile station using said low speed channel;
means assigning said new service to said high speed channel, when said high speed channel is empty;
means determining whether or not said low speed channel is empty, when said high speed channel is not empty;
means determining whether said new service is related to a first communication which requires said high speed channel or a
second communication not requiring said high speed channel, when said low speed channel is empty; and
means assigning said new service to said low speed channel, when said new service is related to said second communication.
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