Mobile communication system, mobile station apparatus, base station apparatus and random access channel transmitting method

Abstract

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.

The invention claimed is: 
     
       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, 
 first information classified corresponding to a situation in which the mobile station apparatus uses the random access channel, 
 
 the first information being used to select, as the transmission control information, one of a transmission frequency resource, transmission power and a signature or a combination thereof, 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 in a case where the mobile station apparatus performs the random access upon each of transmission and retransmission; and   
 a transmitting device configured to transmit the random access channel to the base station apparatus using the transmission control information, wherein
 the transmission control information is implicitly informed to the base station apparatus by using a form of second information that implicitly indicates 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 apparatus comprising:
 a receiving device configured to receive a random access channel from the mobile station apparatus, the random access channel being 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, 
 first information classified corresponding to a situation in which the mobile station apparatus uses the random access channel, 
 the first information being used to select, as the transmission control information, one of a transmission frequency resource, transmission power and a signature or a combination thereof, 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 in a case where the mobile station apparatus performs the random access upon each of transmission and retransmission; 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, wherein
 the transmission control information is implicitly informed from the mobile station apparatus by using a form of second information that implicitly indicates the transmission control information. 
 
 
     
     
       7. A base station apparatus that communicates with a mobile station apparatus, the base station apparatus comprising:
 a receiving device configured to receive a random access channel from the mobile station apparatus, the random access channel being transmitted from the mobile station apparatus according to transmission control information set by the mobiles mobile station apparatus, the transmission control information being based on each of:
 reception quality measured by the mobile station apparatus, 
 first information classified corresponding to a situation in which the mobile station apparatus uses the random access channel,
 the first information being used to select, as the transmission control information, one of a transmission frequency resource, transmission power and a signature or a combination thereof, 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 in a case where the mobile station apparatus performs the random access upon each of transmission and retransmission; 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, wherein
 the transmission control information is implicitly informed from the mobile station apparatus by using a form of second information that implicitly indicates the transmission control information. 
 
 
     
     
       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, 
 first information classified corresponding to a situation in which the mobile station apparatus uses the random access channel,
 the first information being used to select, as the transmission control information, one of a transmission frequency resource, transmission power and a signature or a combination thereof, 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, in a case where the mobile station apparatus performs the random access upon each of transmission and retransmission; and 
 
 transmitting the random access channel to the base station apparatus using the transmission control information, wherein
 the transmission control information is implicitly informed to the base station apparatus by using a form of second information that implicitly indicates the transmission control information. 
 
 
     
     
       12. A scheduling method in a base station apparatus that communicates with a mobile station apparatus, the scheduling method comprising:
 receiving a random access channel from the mobile station apparatus, the random access channel being 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, 
 first information classified corresponding to a situation in which the mobile station apparatus uses the random access channel,
 the first information being used to select, as the transmission control information, one of a transmission frequency resource, transmission power and a signature or a combination thereof, 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, in a case where the mobile station apparatus performs the random access upon each of transmission and retransmission; 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, wherein
 the transmission control information is implicitly informed from the mobile station apparatus by using a form of second information that implicitly indicates the transmission control information. 
 
 
     
     
       13. A scheduling method in a base station apparatus that communicates with a mobile station apparatus, the scheduling method comprising:
 receiving a random access channel from the mobile station apparatus, the random access channel being 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, 
 first information classified corresponding to a situation in which the mobile station apparatus uses the random access channel,
 the first information being used to select, as the transmission control information, one of a transmission frequency resource, transmission power and a signature or a combination thereof, 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, in a case where the mobile station apparatus performs the random access upon each of transmission and retransmission; 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, wherein
 the transmission control information is implicitly informed from the mobile station apparatus by using a form of second information that implicitly indicates the transmission control information. 
 
 
     
     
       14. A mobile station apparatus configured to and/or programmed to communicate with a base station apparatus, the mobile station apparatus comprising:
 transmitting circuitry configured and/or programmed to:
 perform a random access to the base station apparatus,
 the random access being performed according to transmission control information for transmission of a random access channel, and 
 
 set the transmission control information based on classified information,
 the classified information being based on a combination of reception quality and a situation of the mobile station apparatus in a case where the mobile station apparatus performs the random access upon each of transmission and retransmission, and 
 the classified information being used to select, as the transmission control information, one of a transmission frequency resource, transmission power and a signature or a combination thereof, wherein the transmission control information is implicitly informed to the base station apparatus by using a form of information that implicitly indicates the transmission control information; and 
 
   receiving circuitry configured and/or programmed to receive broadcast information including a threshold used for classifying the reception quality.   
     
     
       15. A processing method performed in a mobile station apparatus configured to and/or programmed to communicate with a base station apparatus, the processing method comprising:
 performing a random access to the base station apparatus,
 the random access being performed according to transmission control information for transmission of a random access channel; 
 setting the transmission control information based on classified information,
 the classified information being based on a combination of reception quality and a situation of the mobile station apparatus in a case where the mobile station apparatus performs the random access upon each of transmission and retransmission, and 
 the classified information being used to select, as the transmission control information, one of a transmission frequency resource, transmission power and a signature or a combination thereof, wherein the transmission control information is implicitly informed to the base station apparatus by using a form of information that implicitly indicates the transmission control information; and 
 
 receiving broadcast information including a threshold used for classifying the reception quality. 
   
     
     
       16. A base station apparatus configured to and/or programmed to communicate with a mobile station apparatus, the base station apparatus comprising:
 detecting circuitry configured and/or programmed to detect a random access performed by the mobile station apparatus,
 the random access being according to transmission control information for transmission of a random access channel, 
 the transmission control information being based on classified information,
 the classified information being based on a combination of reception quality and a situation of the mobile station apparatus in a case where the mobile station apparatus performs the random access upon each of transmission and retransmission, 
 the classified information being used to select, as the transmission control information, one of a transmission frequency resource, transmission power and a signature or a combination thereof, wherein the transmission control information is implicitly informed from the mobile station apparatus by using a form of information that implicitly indicates the transmission control information; and 
 
   transmitting circuitry configured and/or programmed to transmit broadcast information including a threshold used for classifying the reception quality.   
     
     
       17. A processing method performed in a base station apparatus configured to and/or programmed to communicate with a mobile station apparatus, the processing method comprising:
 detecting a random access performed by the mobile station apparatus,
 the random access being according to transmission control information for transmission of a random access channel, 
 the transmission control information being based on classified information,
 the classified information being based on a combination of reception quality and a situation of the mobile station apparatus in a case where the mobile station apparatus performs the random access upon each of transmission and retransmission, and 
 the classified information being used to select, as the transmission control information, one of a transmission frequency resource, transmission power and a signature or a combination thereof, wherein the transmission control information is implicitly informed from the mobile station apparatus by using a form of information that implicitly indicates the transmission control information; and 
 
   transmitting broadcast information including a threshold used for classifying the reception quality.