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EP0740485A2
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Channel assignment method for a mobile communication system
Assignee: NEC Corp
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Filing: 1992-05-29
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Granted: —
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Expires: 2012-05-29
Abstract
Abstract In a channel assignment method for a mobile communication system, a plurality of speech communication channels, assigned to perform radio communication between base stations respectively arranged in a plurality of cells constituting a service area and mobile stations in the cells, are classified into first and second groups. The speech communication channels of the second group are classified into a plurality of subgroups. The base stations are then allowed to use speech communication channels belonging to the first group and to one of the subgroups in the second group. Each of the base stations are caused to assign one of the speech communication channels belonging to the first group and one of the subgroups in the second group, which are allowed to be used, to a corresponding one of the mobile stations.
Inventors
- 👤 Kanai Toshihito
- 👤 Hamabe Kojiro
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 11:54
CPC Classifications
H; H04; H04W; H04W72/00; H04W72/50; H04W72/54; H04W72/542; H04W16/00; H04W16/02; H04W16/04; H04W36/00; H04W36/16; H04W36/22; H04W36/24; H04W36/32; H04W36/324; H04W72/541; H04W16/06; H04W16/10; H04W16/12; H04W16/14; H04W36/06; H04W72/56
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
190 words
A channel assignment method for a mobile communication system, characterized by comprising the steps of: classifying a plurality of speech communication channels, assigned to perform radio communication between base stations respectively arranged in a plurality of cells constituting a service area and mobile stations in the cells, into first and second groups; classifying speech communication channels of the second group into a plurality of subgroups; allowing each of the base stations to use speech communication channels belonging to the first group and speech communication channels belonging to one of the subgroup in the second group; and causing each of the base stations to assign one of the speech communication channels belonging to the first group and one of the subgroups in the second group, which are allowed to be used, to one of the mobile stations which makes a speech communication request wherein the base station selects (S1401) one of the first group and one subgroup of the second group, which are allowed to be used, in accordance with a type of the mobile station, and assigning (S1402, S1403) one of the speech communication channels belonging to the selected group.
Claim 2
Dependent Claim
37 words
A method according to claim 1, wherein the type of the mobile station is determined (S1503, S1504) in accordance with an amount of change in propagation loss (L1, L2) between the base station and the mobile station.
Claim 3
Dependent Claim
28 words
A method according to claim 1, wherein the type of the mobile station is determined (S1602, S1604) in accordance with a travelling speed (v) of the mobile station.
Claim 4
Independent Claim
41 words
A method according to any of claims 1 to 3, wherein a speech communication channel to be assigned in response to a speech communication request is selected (S1700) from the speech communication channels belonging to one subgroup of the second group.
Claim 5
Independent Claim
57 words
A method according to any of claims 1 to 4 wherein the channel switching is performed (S1801, S1804) between the speech communication channels belonging to the first group and speech communication channels belonging to one subgroup of the second group in accordance with a use rate (u) of the speech communication channels belonging to the second group.
Claim 6
Independent Claim
72 words
A method according to any of claims 1 to 5, further comprising the steps of; detecting (S1500, S1501) an amount of change in propagation loss (L1, L2) between the base station and a busy one of the mobile stations, and switching (S1503-S1506) the assigned speech communication channel for the busy mobile station to one of idle channels belonging to another group in accordance with an amount of the change in propagation loss.
Claim 7
Independent Claim
61 words
A method according to any of claims 1 to 6, further comprising the steps of; detecting (S1600) a traveling speed of a busy one of the mobile stations, and switching (S1602-S1605) the assigned speech communication channel for the busy mobile station to one of idle channels belonging to another group in accordance with the traveling speed of the busy mobile station.
Claim 8
Independent Claim
67 words
A method according to any of claims 1 to 7, further comprising the steps of; detecting (S1800) a use rate (u) of the speech communication channels belonging to the second group, and switching (S1801-S1804) the assigned speech communication channel for a busy one of the mobile stations to one of idle channels belonging to another group in accordance with the use rate of the speech communication channels.
References Cited (Backward Citations)
JPH02141036A
Cited
JPH03104329A
Cited
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