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    • 10. 发明申请
    • Ranging method in a mobile communication system using orthogonal frequency division multiple access
    • 使用正交频分多址的移动通信系统中的测距方法
    • US20050058058A1
    • 2005-03-17
    • US10909076
    • 2004-07-30
    • Min-Hee ChoBong-Gee SongSang-Hoon SungKwang-Seop Eom
    • Min-Hee ChoBong-Gee SongSang-Hoon SungKwang-Seop Eom
    • H04J11/00H04L5/02H04L12/28H04L12/56
    • H04W74/002H04L5/023H04W72/1278H04W74/04H04W74/08H04W74/0833
    • Disclosed is a method for controlling an operational state of at least one subscriber stations in an OFDM/OFDMA communication system having ranging slots and ranging codes to be used for rangings. The subscriber station performing in a Null state, an initial ranging if an initial ranging request occurs, and transitioning from the Null state to an Idle state if the initial ranging is successful; transitioning to an Access state if a bandwidth request ranging request occurs in the Idle state, and performing in the Access state the bandwidth request ranging based on a random access technique; transitioning from the Access state to a Busy state if the random access-based bandwidth request ranging is successful, performing the bandwidth request ranging based on a scheduled access technique if the bandwidth request ranging request occurs in the Busy state, and transmitting data if the scheduled access-based bandwidth request ranging is successful; and transitioning to a Hold state if the data transmission is ended in the Busy state, and performing the scheduled access-based bandwidth request ranging if the bandwidth request ranging request occurs in the Hold state.
    • 公开了一种用于控制OFDM / OFDMA通信系统中至少一个用户台的操作状态的方法,该OFDM / OFDMA通信系统具有用于测距的测距时隙和测距码。 执行Null状态的用户台,如果发生初始测距请求,则初始测距,如果初始测距成功,则从Null状态转换到空闲状态; 如果在空闲状态下发生带宽请求测距请求,则转换到接入状态,并且在接入状态下,根据随机接入技术进行带宽请求测距; 如果基于随机接入的带宽请求测距成功,则从接入状态转换到忙状态,如果带宽请求测距请求出现在忙状态,则基于调度的接入技术来执行带宽请求测距,并且如果调度 基于访问的带宽请求测距成功; 并且如果数据传输在忙状态下结束,则转换到保持状态,并且如果带宽请求测距请求发生在保持状态,则执行基于调度的基于接入的带宽请求测距。