absolute grant

absolute grant
绝对授权
For E-DCH transmissions, the WTRU 102 sends scheduling requests, (also known as rate requests), for the logical channels which a radio resource control (RRC) determines that reporting is needed to be made to the Node-B 104 via the E-DCH 108. The scheduling requests are transmitted in the form of scheduling information and a happy bit. The happy bit is transmitted via the E-DPCCH 110 whenever the E-DPCCH 110 is transmitted. The Node-B 104 sends a scheduling grant to the WTRU 102 via the E-AGCH 112 or the E-RGCH 114. The scheduling grant is one of absolute grant and a relative grant. The absolute grant is sent by an E-DCH serving radio link set (RLS) via the E-AGCH 112, and the relative grant is sent by either the E-DCH serving RLS or an E-DCH non-serving radio link (RL) via the E-RGCH 114. After E-DCH radio resources are allocated for the WTRU 102, the WTRU 102 transmits uplink data via the E-DCH 108. In response to E-DCH or E-DPCCH transmissions, the Node-B 104 sends an acknowledgement (ACK) or a non-acknowledgement (NACK) message for H-ARQ operation via the E-HICH 116.
基站决定授权的方式有两种：一种是绝对授权方式，另一种是相对授权方式。无论是绝对授权还是相对授权，其实都是基站基于小区可分配的资源、用户的信道质量指示、请求的数据大小等因素给用户设备指示可用的功率资源 (可对应到授权值)，然后通过索引的方式或者相对升高、降低的方式通知到用户设备，然后由用户设备基于该功率资源决定可发送的数据速率。

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