| 摘要 |
The present invention relates to a data unit sending means and a method for controlling a data unit sending means, where data units of a first protocol (L2_ARQ) embed data units of a second protocol (L3) belonging to a higher layer, and said data units of said first protocol (L2_ARQ) are held in a send buffer means. According to the invention, the data units of the second protocol (L3) are discriminated, and the data units of the first protocol (L2_ARQ) that embed a particular data unit of the second protocol (L3) are associated with said particular data unit of the second protocol (L3), and the contents of the send buffer means is managed in accordance with said association.
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