Radio transmitting apparatus and radio transmitting method
First Claim
1. A radio transmitting apparatus, comprising:
- a propagation distance estimating section that estimates a propagation distance from a communicating party station based on a signal transmitted from the communicating party station;
a selecting section that selects a random access channel format of a frame length supporting the estimated propagation distance, from a plurality of random access channel formats of frame lengths supporting propagation distances;
a transmitting section that transmits a random access channel frame using the selected random access channel format; and
an arrangement section that arranges a plurality of items of information in the selected random access channel format, according to the frame length of the selected random access channel format, in descending order of levels of priority assigned respectively to the plurality of items of information, wherein;
the arrangement section arranges only an item of information of a highest level of priority in a random access channel format of a shortest frame length from among the plurality of random access channel formats.
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Accused Products
Abstract
A radio transmitting apparatus and a radio transmitting method wherein the increase of the guard time in a random access region is reduced to secure the data transmitting region of an upstream line. In this apparatus, when a received signal power estimated by a received signal power estimating part (205) is the higher, a RACH format selecting part (206) selects a RACH format having the longer frame length. Contrarily, when a received signal power estimated by the received signal power estimating part (205) is the lower, the RACH format selecting part (206) selects a RACH format having the shorter frame length. A RACH data part arranging part (207) appropriately selects, in accordance with the selected RACH format, top-priority information, such as terminal identifiers, priority information, such as connection request information or band assignment request information, and non-priority information and arranges RACH data parts.
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Citations
8 Claims
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1. A radio transmitting apparatus, comprising:
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a propagation distance estimating section that estimates a propagation distance from a communicating party station based on a signal transmitted from the communicating party station; a selecting section that selects a random access channel format of a frame length supporting the estimated propagation distance, from a plurality of random access channel formats of frame lengths supporting propagation distances; a transmitting section that transmits a random access channel frame using the selected random access channel format; and an arrangement section that arranges a plurality of items of information in the selected random access channel format, according to the frame length of the selected random access channel format, in descending order of levels of priority assigned respectively to the plurality of items of information, wherein; the arrangement section arranges only an item of information of a highest level of priority in a random access channel format of a shortest frame length from among the plurality of random access channel formats. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A radio transmitting method comprising:
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estimating a propagation distance from a communicating party station based on a signal transmitted from the communicating party station; selecting a random access channel format of a frame length supporting the estimated propagation distance, from a plurality of random access channel formats of frame lengths supporting propagation distances; transmitting a random access channel frame using the selected random access channel format; and arranging a plurality of items of information in the selected random access channel format, according to the frame length of the selected random access channel format, in descending order of levels of priority assigned respectively to the plurality of items of information, wherein; only an item of information of a highest level of priority is arranged in a random access channel format of a shortest frame length from among the plurality of random access channel formats.
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Specification