Mobile communication system, mobile station apparatus, base station apparatus and random access channel transmitting method
To improve the delivery probability of a random access channel and increase the information amount notified on the random access channel. In a mobile communication system in which a mobile station apparatus and base station apparatus perform multicarrier communication with each other, the mobile station apparatus sets transmission control information about a random access channel based on a state of the mobile station apparatus in transmitting the random access channel, and the base station apparatus determines the state of the mobile station apparatus based on the transmission control information notified on the random access channel, and performs optimal scheduling corresponding to the state of the mobile station apparatus.
1. A mobile communication system comprising:
a mobile station apparatus; and
a base station apparatus configured to perform communication with the mobile station apparatus,
wherein the mobile station apparatus sets transmission control information for use in transmission of a random access channel, the transmission control information being based on each of:
reception quality measured by the mobile station apparatus,
information classified corresponding to a situation in which the mobile station apparatus uses the random access channel, and
broadcast information that is beforehand received from the base station apparatus and that indicates a threshold to define a combination of the reception quality and the situation to use the random access channel,
and the base station apparatus performs scheduling corresponding to a state of the mobile station apparatus, based on the transmission control information used in transmission of the random access channel from the mobile station apparatus.
2. A mobile communication system, comprising:
a mobile station apparatus; and
a base station apparatus configured to perform communication with the mobile station apparatus,
wherein the mobile station apparatus sets transmission control information for use in transmission of a random access channel, the transmission control information being based on each of:
reception quality measured by the mobile station apparatus,
information classified corresponding to a situation in which the mobile station apparatus uses the random access channel, and
broadcast information that is beforehand received from the base station apparatus and that indicates a threshold to define a combination of the reception quality and the situation to use the random access channel,
and the base station apparatus performs scheduling on radio resources and a modulation scheme to allocate to the mobile station apparatus based on the transmission control information used in transmission of the random access channel from the mobile station apparatus.
3. The mobile communication system according to claim 1 or 2 , wherein the mobile station apparatus uses a quality information indicator or path loss as the reception quality, and
sets, as the transmission control information, one of a transmission frequency region, transmission power and a signature of the random access channel or a combination thereof.
4. A mobile station apparatus that communicates with a base station apparatus, the mobile station apparatus comprising:
a transmission control information setting device configured to set transmission control information for use in transmission of a random access channel, based on each of:
reception quality measured by the mobile station apparatus,
information classified corresponding to a situation in which the mobile station apparatus uses the random access channel, and
broadcast information that is beforehand received from the base station apparatus and that indicates a threshold to define a combination of the reception quality and the situation to use the random access channel;
and a transmitting device configured to transmit the random access channel to the base station apparatus using the transmission control information.
5. The mobile station apparatus according to claim 4 , wherein the transmission control information setting device uses a quality information indicator or path loss as the reception quality, and
sets, as the transmission control information, one of a transmission frequency region, transmission power and a signature of the random access channel or a combination thereof.
6. A base station apparatus that communicates with a mobile station apparatus, the base station comprising:
a receiving device configured to receive a random access channel from the mobile station apparatus, the random access channel transmitted from the mobile station apparatus according to transmission control information set by the mobile station apparatus, the transmission control information being based on each of:
reception quality measured by the mobile station apparatus,
information classified corresponding to a situation in which the mobile station apparatus uses the random access channel, and
broadcast information that is beforehand received from the base station apparatus and that indicates a threshold to define a combination of the reception quality and the situation to use the random access channel;
and a scheduling device configured to perform scheduling corresponding to a state of the mobile station apparatus based on the transmission control information used in transmission of the random access channel.
7. A base station apparatus that communicates with a mobile station apparatus, the base station comprising:
a receiving device configured to receive a random access channel from the mobile station apparatus, the random access channel transmitted from the mobile station apparatus according to transmission control information set by the mobiles station apparatus, the transmission control information being based on each of:
reception quality measured by the mobile station apparatus,
information classified corresponding to a situation in which the mobile station apparatus uses the random access channel, and
broadcast information that is beforehand received from the base station apparatus and that indicates a threshold to define a combination of the reception quality and the situation to use the random access channel;
and a scheduling device configured to perform scheduling on radio resources and a modulation scheme to allocate to the mobile station apparatus based on the transmission control information used in transmission of the random access channel.
8. The base station apparatus according to claim 6 or 7 , wherein the scheduling device performs scheduling based on one of a transmission frequency region, transmission power and a signature of the random access channel of a combination thereof as the transmission control information.
9. A mobile communication method in which a mobile station apparatus and a base station apparatus perform communication with each other, the method comprising:
setting, using the mobile station apparatus, transmission control information for use in transmission of a random access channel, based on each of:
reception quality measured by the mobile station apparatus,
information classified corresponding to a situation in which the mobile station apparatus uses the random access channel, and
broadcast information that is beforehand received from the base station apparatus and that indicates a threshold to define a combination of the
reception quality and the situation to use the random access channel, and using the base station apparatus to perform scheduling corresponding to a state of the mobile station apparatus, based on the transmission control information used in transmission of the random access channel.
10. A mobile communication method in which a mobile station apparatus and a base station apparatus perform communication with each other, the method comprising:
setting, using the mobile station apparatus, transmission control information for use in transmission of a random access channel, based on each of:
reception quality measured by the mobile station apparatus,
information classified corresponding to a situation in which the mobile station apparatus uses the random access channel, and
broadcast information that is beforehand received from the base station apparatus and that indicates a threshold to define a combination of the reception quality and the situation to use the random access channel, and
using the base station apparatus to perform scheduling on radio resources and a modulation scheme to allocate to the mobile station apparatus based on the transmission control information used in transmission of the random access channel.
11. A method of transmitting a random access channel from a mobile station apparatus that communicates with a base station apparatus, the method comprising:
setting transmission control information for use in transmission of a random access channel, based on each of:
reception quality measured by the mobile station apparatus,
information classified corresponding to a situation in which the mobile station apparatus uses the random access channel, and
broadcast information that is beforehand received from the base station apparatus and that indicates a threshold to define a combination of the reception quality and the situation to use the random access channel, and transmitting the random access channel to the base station apparatus using the transmission control information.
12. A scheduling method in a base station apparatus that communicates with a mobile station apparatus, the method comprising:
receiving a random access channel from the mobile station apparatus, the random access channel transmitted from the mobile station apparatus using transmission control information set by the mobile station apparatus based on each of:
reception quality measured by the mobile station apparatus,
information classified corresponding to a situation in which the mobile station apparatus uses the random access channel, and
broadcast information that is beforehand received by the mobile station apparatus from the base station apparatus and that indicates a threshold to define a combination of the reception quality and the situation to use the random access channel, and
performing scheduling corresponding to a state of the mobile station apparatus based on the transmission control information used in transmission of the random access channel from the mobile station apparatus.
13. A scheduling method in a base station apparatus that communicates with a mobile station apparatus, the method comprising:
receiving a random access channel from the mobile station apparatus, the random access channel transmitted from the mobile station apparatus using transmission control information set by the mobile station apparatus based on each of:
reception quality measured by the mobile station apparatus,
information classified corresponding to a situation in which the mobile station apparatus uses the random access channel, and
broadcast information that is beforehand received by the mobile station apparatus from the base station apparatus and that indicates a threshold to define a combination of the reception quality and the situation to use the random access channel, and
performing scheduling on radio resources and a modulation scheme to allocate to the mobile station apparatus based on the transmission control information used in transmission of the random access channel from the mobile station apparatus.