Base station device, mobile station device, communication system and communication method
AssigneeSharp Kabushiki Kaisha
InventorsYasuyuki Kato, Shohei Yamada
Life of this patent
Estimating the term…
Abstract
A base station device which communicates with a mobile station device, comprising an uplink synchronization managing unit which manages uplink synchronization maintenance status of the mobile station device, and a transmitting unit which transmits a synchronization recovery request to the mobile station which is in the uplink synchronization maintenance status.
Claims8
A mobile station device which communicates with a base station device, the mobile station device comprising:
- a transmission/reception unit transmitter/receiver configured to
- transmit data to the base station device on dedicated channels assigned to the mobile station device,
- receive a response from the base station device, and
- retransmit the data on the dedicated channels in case that the response of the base station device for the data is a predetermined response;
- and
- a random access performing section the transmitter/receiver configured not to retransmit the data on dedicated channels but to perform random access on a random access channel that is a non-dedicated channel in case that the predetermined response is detected over predetermined times.
A communication method of a mobile station device, the communication method comprising:
- transmitting data to a base station device on dedicated channels assigned to the mobile station device;
- receiving a response from the base station device;
- retransmitting the data on the dedicated channels in case that the response of the base station device for the data is predetermined response;
- and
- performing random access on a random access channel that is a non-dedicated channel, without transmission of the data on the dedicated channels, in case that the predetermined response is detected over predetermined times.
A communication method of a user equipment, the communication method comprising:
- detecting responses of a base station device for transmitting data to the base station device,
- wherein the data is transmitted on uplink to the base station device by the user equipment and the data is retransmitted by the user equipment in a case that a predetermined condition is not satisfied;
- and
- performing random access on a random access channel to the base station device in a case that the predetermined condition is satisfied, wherein the random access is contention based random access.
A user equipment which communicates with a base station device, the user equipment comprising:
- a receiver/transmitter configured to and/or programmed to detect responses of the base station device for transmitting data to the base station device,
- wherein the data is transmitted on uplink to the base station device by the user equipment and the data is retransmitted by the user equipment in a case that a predetermined condition is not satisfied;
- and
- the receiver/transmitter configured to and/or programmed to perform random access on a random access channel to the base station device in a case that the predetermined condition is satisfied, wherein the random access is contention based random access.
A processing device that is mounted in a user equipment, the processing device comprising:
- a receiver/transmitter configured to and/or programmed to detect responses of a base station device for transmitting data to the base station device,
- wherein the data is transmitted on uplink to the base station device by the user equipment and the data is retransmitted by the user equipment in a case that a predetermined condition is not satisfied;
- and
- the receiver/transmitter configured to and/or programmed to perform random access on a random access channel to the base station device in a case that the predetermined condition is satisfied, wherein the random access is contention based random access.
Dependencies are inferred from the claim text.