METHOD OF ALLOCATING RESOURCES TO MOBILE TERMINALS
The invention provides a method of allocating resources to mobile terminals. The method comprises the following iterative steps: mobile terminals having at least one elastic link cause the data rates on their elastic links to grow in application of a predetermined temporal law; and when a mobile terminal having at least one constant link detects that its coverage on the constant link is threatened, it sends an alert message to the base station of the cell, with said base station then requiring said mobile terminals that have at least one elastic link to reduce temporarily their data rates on those elastic links by a predetermined quantity. The method is applicable to networks of the W-CDMA type or of the LTE type.
1 . A resource allocation method for allocating resources to mobile terminals in a radio cell, the method comprising:
mobile terminals (M e ) having at least one elastic link cause the data rates on their elastic links to grow in application of a predetermined temporal law; and
when a mobile terminal (M f ) having at least one constant link detects that its coverage on the constant link is threatened, it sends an alert message to the base station of the cell, with the base station then requiring the mobile terminals (M e ) that have at least one elastic link to reduce temporarily their data rates on those elastic links by a predetermined quantity.
2 . The resource allocation method according to claim 1 , wherein the temporal law applied by a terminal (M e ) having at least one elastic link is defined by indexed data rates, the data rate indices being values taken by a predetermined function La(kT), where k is a time index having integer values and T designates the periodicity with which frames are transmitted, theses function growing over an interval
0≦k≦k max
where k max is a predetermined maximum.
3 . The resource allocation method according to claim 1 , wherein a mobile terminal (M f ) having at least one constant link detects that its coverage on that constant link is threatened when:
IC<IC min
where IC is a coverage indicator measured by the mobile terminal (M f ) and IC min is a predetermined minimum value.
4 . The resource allocation method according to claim 3 , wherein the coverage indicator is calculated using the formula:
IC
=
Ptx
max
Ptx
where Ptx designates the current transmission power of the mobile terminal (M f ) and Ptx max its maximum transmission power.
5 . The resource allocation method according to claim 3 , wherein the coverage indicator is calculated using the formula:
IC
=
Ptx
max
Ptx
×
PL
PL
bord
where Ptx designates the current transmission power of the mobile terminal (M f ), Ptx max its maximum transmission power, PL its path loss, and PL bord a target path loss at the borders of the cell.
6 . A mobile terminal (M e ) configured to:
after an elastic link has been created between the mobile terminal (M e ) and a base station of a cellular network, receive from the base station a standardized message concerning data rate growth for theses elastic link;
receive from the base station a saturation message; and
after receiving the saturation message, temporarily reduce the data rate on the elastic link by a predetermined quantity, and then once more cause the data rate to grow.
7 . A mobile terminal (M f ) configured to:
detect that its coverage on a constant link that it maintains with a base station of a cellular network is threatened; and
after detection, send an alert message to the base station.
8 . The mobile terminal according to claim 7 , wherein the mobile terminal detects that its coverage on the constant link is threatened when:
IC<IC min
where IC is a coverage indicator measured by the mobile terminal (M f ) and IC min is a predetermined minimum.
9 . The mobile terminal according to claim 8 , wherein the coverage indicator is calculated using the formula:
IC
=
Ptx
max
Ptx
where Ptx designates the current transmission power of the mobile terminal (M f ) and Ptx max its maximum transmission power.
10 . The mobile terminal according to claim 8 , wherein the coverage indicator is calculated using the formula:
IC
=
Ptx
max
Ptx
×
PL
PL
bord
where Ptx designates the current transmission power of the mobile terminal (M f ), Ptx max its maximum transmission power, PL its path loss, and PL bord a target path loss at the borders of the cell.
11 . A base station of a cellular network, the base station being configured to:
after an elastic link has been created between itself and a mobile terminal (M e ), send a standardized message to the mobile terminal (M e ) concerning data rate growth for the elastic link;
receive a loss of coverage message from a terminal (M f ) having at least one constant link; and
after receiving the loss of coverage message, send a saturation message to all the mobile terminals having at least one elastic link.
12 . A non-transitory computer-readable medium including computer program code instructions that, when executed by a computer, are programmed to execute the method according to claim 1 .
13 . (canceled)