Apparatus and method for utilizing uplink resources
An apparatus and method for data transmission are presented. The method in a base station comprises broadcasting ( 200 ) information on one or more neighboring cells supporting preconfigured uplink resources and information on request types supported by the one or more cells; receiving ( 202 ) a user terminal which performs a cell reselection to the base station; receiving ( 204 ) from a user terminal a request to utilize dedicated preconfigured uplink resources, the request comprising Physical Cell Identity of the previous base station with which the user terminal utilized dedicated preconfigured uplink resources prior camping on the base station and the User Equipment Identification of the user terminal in the previous base station; transmitting ( 206 ) to the previous base station a message requesting configuration data related to dedicated preconfigured uplink resources of the user terminal and an indication that the previous base station may release the resources; receiving ( 208 ) from the previous base station the configuration data; and restoring ( 210 ) dedicated preconfigured uplink resources for the user terminal.
1. A base station apparatus in a communication system serving a cell, configured to communicate with a user terminal, the apparatus comprising:
at least one processor; and
at least one memory including computer program code,
the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus at least to perform:
broadcast information on one or more neighboring cells supporting preconfigured uplink resources and information on request types supported by the one or more cells;
receive from a user terminal a request to utilize dedicated preconfigured uplink resources, the request comprising Physical Cell Identity of the previous base station with which the user terminal utilized dedicated preconfigured uplink resources prior camping on the base station and the User Equipment Identification of the user terminal in the previous base station;
transmit to the previous base station a message requesting configuration data related to dedicated preconfigured uplink resources of the user terminal and an indication that the previous base station may release the resources;
receive from the previous base station the configuration data; and
restore dedicated preconfigured uplink resources for the user terminal.
2. The base station apparatus of claim 1 , the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus further to perform:
receive the request to utilize dedicated preconfigured uplink resources on shared preconfigured uplink resources.
3. The base station apparatus of claim 1 , the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus further to perform:
receive the request to utilize dedicated preconfigured uplink resources as Early Data Transmission from the user terminal.
4. The base station apparatus of claim 1 , the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus further to perform:
receive from the user terminal identities of base stations serving neighboring cells, for which the user terminal is able to obtain timing advance information and which are suitable base stations for allocating preconfigured uplink resources for the user terminal.
5. The base station apparatus of claim 1 , the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus further to perform:
configure the preconfigured uplink resources for the user terminal with an indication that the user terminal may be switched to another base station serving a neighboring cell reported by the user terminal.
6. The base station apparatus of claim 1 , the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus further to perform:
determine that there is a need for capacity in the cell served by the base station; and
transmit a preconfigured uplink resource switching command to the user terminal, the command identifying the base station to be switched to and time instant of the switching.