Mobile station apparatus, base station apparatus, integrated circuit, and method of detecting random access problems

Abstract

A method of detecting random access problems in a mobile station apparatus which uses multiple component carriers to perform random access. To achieve this, the mobile station apparatus, which is in a mobile communication system comprised of a base station apparatus and mobile station apparatuses, uses one random access channel transmission counter to detect random access problems in the plurality of component carriers.

1 - 29 . (canceled) 
     
     
         30 . A random access problem detecting method of a mobile station apparatus using multiple component carriers that are usable frequency bands to communicate with a base station apparatus, wherein
 the mobile station apparatus at least comprises the steps of:   setting one counter for counting the number of transmissions of a random access channel to a master component carrier specified by the base station apparatus;   transmitting the random access channel to the base station apparatus;   counting the number of transmissions of the random access channel transmitted by the counter using the master component carrier; and   recognizing that a random access problem is detected for all the component carriers if the number of transmissions reaches a predetermined maximum number of transmissions.   
     
     
         31 . The random access problem detecting method as defined in  claim 30 , wherein the master component carrier is an uplink component carrier that is paired with a downlink component carrier that the mobile station apparatus accesses first. 
     
     
         32 . The random access problem detecting method as defined in  claim 30 , wherein the master component carrier is an uplink component carrier that is paired with a downlink component carrier having a highest priority specified with broadcast information transmitted from the base station apparatus. 
     
     
         33 . A random access problem detecting method of a mobile station apparatus using multiple component carriers that are usable frequency bands to communicate with a base station apparatus, wherein
 the mobile station apparatus at least comprises the steps of:   setting a counter for counting the number of transmissions of a random access channel one-by-one to each of the plurality of component carriers;   transmitting the random access channel to the base station apparatus;   counting the number of transmissions of the random access channel transmitted by the counter using the component carriers; and   recognizing that a random access problem is detected if all the numbers of transmissions for the plurality of component carriers reach a predetermined maximum number of transmissions.   
     
     
         34 . A random access problem detecting method of a mobile station apparatus using multiple component carriers that are usable frequency bands to communicate with a base station apparatus, wherein
 the mobile station apparatus at least comprises the steps of:   forming multiple component carrier groups from the plurality of component carriers in accordance with information for forming the component carrier groups transmitted from the base station apparatus;   setting a counter for counting the number of transmissions of a random access channel one-by-one to each of the plurality of component carrier groups;   transmitting the random access channel to the base station apparatus;   counting the number of transmissions of the random access channel by the counter; and   recognizing that a random access problem is detected if all the numbers of transmissions for the component carrier groups reach a predetermined maximum number of transmissions.   
     
     
         35 . The random access problem detecting method as defined in  claim 34 , at least comprises the step of setting a master component carrier for each of the component carrier groups. 
     
     
         36 . The random access problem detecting method as defined in  claim 35 , at least comprises the step of setting the counter to a master component carrier included in each of the component carrier groups. 
     
     
         37 . A random access problem detecting method of a mobile station apparatus using multiple component carriers that are usable frequency bands to communicate with a base station apparatus, wherein
 the mobile station apparatus at least comprises the steps of:   transmitting a random access channel to the base station apparatus;   activating a timer for detecting a random access problem if the number of transmissions of the random access channel reaches a predetermined maximum number of transmissions; and   recognizing that a random access problem is detected if the timer reaches a predetermined time.   
     
     
         38 . A mobile station apparatus using multiple component carriers to communicate with a base station apparatus, wherein
 one counter for counting the number of transmissions of a random access channel is set to a master component carrier specified by the base station apparatus out of the plurality of component carriers,   the random access channel is transmitted to the base station apparatus,   the counter counts the number of transmissions of the random access channel transmitted using the master component carrier, and   detection of a random access problem is recognized for all the component carriers if the number of transmissions reaches a predetermined maximum number of transmissions.   
     
     
         39 . The mobile station apparatus as defined in  claim 38 , wherein the master component carrier is an uplink component carrier that is paired with a downlink component carrier that the mobile station apparatus first accesses. 
     
     
         40 . The mobile station apparatus as defined in  claim 38 , wherein the master component carrier is an uplink component carrier that is a paired with a downlink component carrier having a highest priority specified with broadcast information transmitted from the base station apparatus. 
     
     
         41 . A mobile station apparatus using multiple component carriers to communicate with a base station apparatus, wherein
 a counter for counting the number of transmissions of a random access channel one-by-one is set to each of the plurality of component carriers,   the random access channel is transmitted to the base station apparatus,   the counter counts the number of transmissions of the random access channel transmitted using the component carriers for each of the component carriers, and   detection of a random access problem is recognized if all the numbers of transmissions reach a predetermined maximum number of transmissions.   
     
     
         42 . A mobile station apparatus using multiple component carriers to communicate with a base station apparatus, wherein
 multiple component carrier groups are formed from the plurality of component carriers in accordance with information for forming the component carrier groups transmitted from the base station apparatus,   a counter for counting the number of transmissions of a random access channel one-by-one is set to each of the plurality of component carrier groups;   the random access channel is transmitted to the base station apparatus,   the counter counts the number of transmissions of the random access channel transmitted from the component carrier groups for each of the component carrier group, and   detection of a random access problem is recognized if all the numbers of transmissions reach a predetermined maximum number of transmissions.   
     
     
         43 . A mobile station apparatus using multiple component carriers to communicate with a base station apparatus, wherein
 a random access channel is transmitted to the base station apparatus,   the number of transmissions of the random access channel is counted,   a timer for detecting a random access problem is activated if the number of transmissions reaches a predetermined maximum number of transmissions, and   detection of a random access problem is recognized if the timer reaches a predetermined expiration time.   
     
     
         44 . An integrated circuit, when mounted on a mobile station apparatus, making the mobile station apparatus implement multiple functions of:
 setting one counter for counting the number of transmissions of a random access channel to a master component carrier specified by a base station apparatus;   transmitting the random access channel to the base station apparatus;   counting the number of transmissions of the random access channel transmitted by the counter using the master component carrier; and   recognizing that a random access problem is detected for all the component carriers if the number of transmissions reaches a predetermined maximum number of transmissions.   
     
     
         45 . An integrated circuit, when mounted on a mobile station apparatus, making the mobile station apparatus implement multiple functions of:
 setting a counter for counting the number of transmissions of a random access channel one-by-one to each of multiple component carriers;   transmitting the random access channel to the base station apparatus;   counting the number of transmissions of the random access channel transmitted by the counter using the component carriers for each of the component carriers; and   recognizing that a random access problem is detected if all the numbers of transmissions reach a predetermined maximum number of transmissions.   
     
     
         46 . An integrated circuit, when mounted on a mobile station apparatus, making the mobile station apparatus implement multiple functions of:
 setting a counter for counting the number of transmissions of a random access channel one-by-one to each of multiple component carrier groups made up of multiple component carriers;   transmitting the random access channel to the base station apparatus;   counting the number of transmissions of the random access channel transmitted from the component carrier groups for each of the component carrier groups by the counter; and   recognizing that a random access problem is detected if all the numbers of transmissions reach a predetermined maximum number of transmissions.   
     
     
         47 . An integrated circuit, when mounted on a mobile station apparatus, making the mobile station apparatus implement multiple functions of:
 transmitting a random access channel to a base station apparatus;   counting the number of transmissions of the random access channel;   activating a timer for detecting a random access problem if the number of transmissions reaches a predetermined maximum number of transmissions; and   recognizing that a random access problem is detected if the timer reaches a predetermined time.