EP0631397A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Method of channel allocation in a mobile radio telephone system using transmission power control
Assignee: NEC Corp
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Filing: 1994-05-17
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Granted: —
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Expires: 2014-05-17
Abstract
Abstract The invention provides channel allocation method which achieves a high frequency utilization efficiency while suppressing the average transmission power by transmission power control. Selection priority degrees and initial minimum transmission power control amounts are set for all radio channels allocated to the system. The initial minimum transmission power control amounts are set such that the radio channel having higher selection priority degree has higher or at least equal initial minimum transmission power control amount than the lower selection priority radio channel. Upon channel allocation, a radio channel is selected in accordance with the selection priority degree, by the way that calculating the transmission power control amount of the radio channel (S505 to S507), comparing the transmission power control amount with the initial minimum transmission power control amount (S508), and when the transmission power control amount is equal to or higher than the initial minimum transmission power control amount, then use of the radio channel is permitted.
Inventors
- 👤 Toshihito Kanai
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 22:53
CPC Classifications
H; H04; H04W; H04W52/00; H04W52/04; H04W52/38; H04W52/50; H04W52/18; H04W52/28; H04W52/281; H04W52/283; H04W72/00; H04W72/50; H04W72/56
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
106 words
A channel allocation method in a mobile communications system in which a plurality of base stations are disposed in a service area and radio communication is performed between one of said base stations and a mobile station, said method handled by each base station comprising the steps of: setting the control range of the transmission power control amount for each radio channels; and selecting, upon communication of each of said base stations with the mobile station, one of said radio channels which has a control range corresponding to the necessary transmission power control amount, and allocating the selected radio channel for communication with the mobile station.
Claim 2
Dependent Claim
83 words
A method as claimed in claim 1, further comprising the steps of: setting a selection priority degree and a first threshold value to each of the radio channels such that the first threshold value is set at least equal to or higher for the channel having higher priority degree than the lower priority channel; and allocating of one radio channel having the first threshold value when the transmission power control amount for the communication with the mobile station exceeds the first threshold value.
Claim 3
Dependent Claim
67 words
A method as claimed in claim 2, further comprising the steps of: counting the frequency of interference and compulsory disconnection occurring in service corresponding for each of the first threshold values; and inhibiting the allocation of radio channel whose first threshold value is the least level of the transmission control power amount when the frequency corresponding to said first threshold value becomes higher than a predetermined value.
Claim 4
Dependent Claim
59 words
A method as claimed in claim 1, 2 or 3, further comprising the steps of: setting a second threshold value for each of the radio channels; and starting to switch a radio channel in use to another available channel when the average transmission power control amount within a fixed time in service becomes lower than the second threshold value.
Claim 5
Independent Claim
61 words
A method as claimed in any one or claims 1 to 4, further comprising the steps of: setting a third threshold value for each of the radio channels; and starting to switch a radio channel in use to another available channel when the average transmission power control amount within a fixed time in service becomes higher than the third threshold value.
Claim 6
Dependent Claim
33 words
A method as claimed in claim 4 or 5, further comprising the step of: switching a radio channel in use only to another free radio channel in the same time-division multiplexed carrier frequency.
Claim 7
Independent Claim
32 words
A method as claimed in any one of claims 2 to 6, wherein said first threshold value is varied in response to the average transmission power control amount within a fixed time.
Claim 8
Independent Claim
32 words
A method as claimed in any one of claims 4 to 7, wherein said second threshold value is varied in response to the average transmission power control amount within a fixed time.
Claim 9
Independent Claim
32 words
A method as claimed in any one of claims 5 to 8, wherein said third threshold value is varied in response to the average transmission power control amount within a fixed time.
Claim 10
Independent Claim
42 words
A method as claimed in any one of claims 4 to 9, wherein the second threshold value is varied in response to the number of times the transmission power control amount becomes lower than said second threshold value within a fixed time.
Claim 11
Independent Claim
42 words
A method as claimed in any one of claims 5 to 10, wherein said third threshold value is varied in response to the number of times the transmission power control amount becomes lower than said third threshold value within a fixed time.
Claim 12
Dependent Claim
93 words
A mobile communications system wherein a plurality of base stations are disposed in a service area and radiocommunication is performed between one of said base stations and a mobile station, said system comprising in each base station: means for setting and registering the control range of the transmission power control amount for each radio channels; and means for selecting, upon communication with the mobile station, one radio channel which has a control range corresponding to the necessary transmission power control amount, and allocating the selected radio channel for communication with the mobile station.
Claim 13
Dependent Claim
85 words
A system as claimed in claim 12, further comprising: means for providing a selection priority degree and registering a first threshold value to each of the radio channels such that the first threshold value is set at least equal to or higher for the channel having higher priority degree than the lower priority channel; and means for allocating of one radio channel having the first threshold value when the transmission power control amount for the communication with the mobile station exceeds the first threshold value.
Claim 14
Dependent Claim
68 words
A system as claimed in claim 13, further comprising: means for counting the frequency of interference and compulsory disconnection occurring in service corresponding for each of the first threshold values; and means for inhibiting the allocation of radio channel whose first threshold value is the least level of the transmission control power amount when the frequency corresponding to said first threshold value becomes higher than a predetermined value.
Claim 15
Dependent Claim
58 words
A system as claimed in claim 12, 13 or 14, further comprising: means for setting and preferably registering a second threshold value for each of the radio channels; and means for starting to switch to another radio channel when the average transmission power control amount becomes lower than the second threshold value within a fixed time in service.
Claim 16
Independent Claim
57 words
A system as claimed in any one of claims 12 to 15, further comprising: means for setting a third threshold value for each of the radio channels; and means for starting to switch to another available channel when the average transmission power control amount becomes higher than the third threshold value within a fixed time in service.
Claim 17
Dependent Claim
42 words
A system as claimed in claim 15 or 16, further comprising: means for switching a radio channel in use preferably only to another free radio channel within the same time-division multiplexed carrier frequency in which at least one radio channel is accommodated.
Claim 18
Independent Claim
34 words
A system as claimed in any one of claims 13 to 17, further comprising: means for varying the first threshold value in response to the average transmission power control amount within a fixed time.
Claim 19
Independent Claim
34 words
A system as claimed in any one of claims 15 to 18, further comprising: means for varying the second threshold value in response to the average transmission power control amount within a fixed time.
Claim 20
Independent Claim
34 words
A system as claimed in any one of claims 16 to 19, further comprising: means for varying the third threshold value in response to the average transmission power control amount within a fixed time.
Claim 21
Independent Claim
44 words
A system as claimed in any one of claims 15 to 20, further comprising: means for varying said second threshold value in response to the number of times the transmission power control amount becomes lower than said second threshold value within a fixed time.
Claim 22
Independent Claim
44 words
A system as claimed in any one of claims 16 to 21, further comprising: means for varying said third threshold value in response to the number of times the transmission power control amount becomes lower than said third threshold value within a fixed time.
References Cited (Backward Citations)
No citation records indexed.
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