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US 8,526,373 B2Granted
Base station apparatus and communication control method for radio resource allocation
AssigneeNtt Docomo, Inc.
InventorsHiroyuki Ishii, Anil Umesh
Life of this patent
Estimating the term…
Abstract
A base station apparatus capable of communicating with user equipment terminals using an uplink shared channel includes a radio resource allocation unit configured to allocate radio resources other than a resource placed at an end of a system bandwidth, when the system bandwidth is frequency-adjacent to a heterogeneous radio communication system.
Claims9
A base station apparatus configured to communicate with user equipment terminals using an uplink shared channel, comprising:
- a first radio resource allocation unit configured to allocate radio resources according to dynamic scheduling among resources other than a resource placed at an end of a system bandwidth, when the system bandwidth is frequency-adjacent to a heterogeneous radio communication system;
- a second radio resource allocation unit configured to allocate an uplink control channel to the resource placed at the end of the system bandwidth;
- the radio resource allocation unit further configured to allocate to a user equipment terminal with lower path loss a frequency resource for the shared channel on the side of a heterogeneous radio communication system and allocate to a user equipment terminal with higher path loss a frequency resource for the shared channel on the side of a homogeneous radio communication system, when one end of a system bandwidth is frequency-adjacent to the heterogeneous radio communication system and the other end of the system bandwidth is frequency-adjacent to the homogeneous radio communication system;
- and
- a transmission unit configured to transmit radio allocation information to one of the user equipment terminals.
2 more elements
A base station apparatus configured to communicate with user equipment terminals using an uplink shared channel, comprising:
- a radio resource allocation unit configured to allocate to a user equipment terminal with lower path loss a frequency resource for the shared channel on the side of a heterogeneous radio communication system and allocate to a user equipment terminal with higher path loss a frequency resource for the shared channel on the side of a homogeneous radio communication system, when one end of a system bandwidth is frequency-adjacent to the heterogeneous radio communication system and the other end of the system bandwidth is frequency-adjacent to the homogeneous radio communication system;
- and
- a transmission unit configured to transmit radio allocation information to one of the user equipment terminals.
A base station apparatus configured to communicate with user equipment terminals using an uplink shared channel, comprising:
- a radio resource allocation unit configured to allocate to a user equipment terminal with lower path loss a frequency resource for the shared channel near a frequency used for downlink and allocate to a user equipment terminal with higher path loss a frequency resource for the shared channel far from the frequency used for downlink, when the frequency used for downlink is different from a frequency used for uplink;
- the radio resource allocation unit further configured to allocate to a user equipment terminal with lower path loss a frequency resource for the shared channel on the side of a heterogeneous radio communication system and allocate to a user equipment terminal with higher path loss a frequency resource for the shared channel on the side of a homogeneous radio communication system, when one end of a system bandwidth is frequency-adjacent to the heterogeneous radio communication system and the other end of the system bandwidth is frequency-adjacent to the homogeneous radio communication system;
- and
- a transmission unit configured to transmit radio allocation information to one of the user equipment terminals.
1 more element
A communication control method in a base station apparatus configured to communicate with user equipment terminals using an uplink shared channel, comprising the steps of:
- when one end of a system bandwidth is frequency-adjacent to a heterogeneous radio communication system and the other end of the system bandwidth is frequency-adjacent to a homogeneous radio communication system,
- allocating to a user equipment terminal with lower path loss a frequency resource for the shared channel on the side of the heterogeneous radio communication system;
- and
- allocating to a user equipment terminal with higher path loss a frequency resource for the shared channel on the side of the homogeneous radio communication system.
1 more element
A communication control method in a base station apparatus configured to communicate with user equipment terminals using an uplink shared channel, comprising the steps of:
- when a frequency used for downlink is different from a frequency used for uplink,
- allocating to a user equipment terminal with lower path loss a frequency resource for the shared channel near the frequency used for downlink;
- increasing an upper limit of a frequency resource for the shared channel with respect to the user equipment terminal with lower path loss;
- allocating to a user equipment terminal with higher path loss a frequency resource for the shared channel far from the frequency used for downlink;
- and
- decreasing the upper limit of the frequency resource for the shared channel with respect to the user equipment terminal with higher path loss;
- when one end of a system bandwidth is frequency-adjacent to a heterogeneous radio communication system and the other end of the system bandwidth is frequency-adjacent to a homogeneous radio communication system,
- allocating to a user equipment terminal with lower path loss a frequency resource for the shared channel on the side of the heterogeneous radio communication system;
- and
- allocating to a user equipment terminal with higher path loss a frequency resource for the shared channel on the side of the homogeneous radio communication system.
7 more elements
A radio resource allocation method in a base station apparatus configured to communicate with user equipment terminals using an uplink shared channel, comprising the steps of:
- allocating radio resources according to dynamic scheduling among resources other than a resource placed at an end of a system bandwidth, when the system bandwidth is frequency-adjacent to a heterogeneous radio communication system;
- and
- allocating an uplink control channel to the resource placed at the end of the system bandwidth;
- when one end of a system bandwidth is frequency-adjacent to a heterogeneous radio communication system and the other end of the system bandwidth is frequency-adjacent to a homogeneous radio communication system,
- allocating to a user equipment terminal with lower path loss a frequency resource for the shared channel on the side of the heterogeneous radio communication system;
- and
- allocating to a user equipment terminal with higher path loss a frequency resource for the shared channel on the side of the homogeneous radio communication system.
4 more elements
Dependencies are inferred from the claim text.