Radio LAN system implementing simultaneous communication with different types of information and communication method for the same
First Claim
1. A method of transmitting an information signal by radio between an access point and a station present in a short-range service area in a radio LAN system, comprising the steps of:
- setting up, as an access system between the access point and the station, a CDMA (Code Division Multiple Access) system using a plurality of spread codes for spreading the information signal;
maintaining transmission power at a guaranteed level below spread semi-fixed level for the information signal;
selecting, in accordance with a kind and an amount of the information signal, a frequency band and a frequency to be assigned to the information signal and a structure of a packet for transmitting the information signal; and
transmitting the information signal in accordance with a transmission procedure; and
storing a particular frequency band and a particular frequency to be used, and other information assigned to each kind of information in advance,in said step of selecting, the stored frequency band and the frequency matching with a kind and a quality of data as well as the processing procedure being read out, and each of voice and data being processed as the information signal based on readout information.
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Abstract
A radio LAN (Local Area Network) system includes an access point and a mobile or a fixed station each having a physical layer implemented by a direct spread spectrum system. The LAN system uses different spread codes, maintains transmission power semi-fixed, and selects a frequency and a frequency band in accordance with the kind and amount of information. A data link layer above each physical layer includes an LLC (Logical Link Control) sublayer and an MAC (Media Access Control) sublayer. The MAC sublayer uses a CDMA (Code Division Multiple Access) system as an access system for thereby implementing a data structure in accordance with the kind and amount of information.
12 Citations
8 Claims
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1. A method of transmitting an information signal by radio between an access point and a station present in a short-range service area in a radio LAN system, comprising the steps of:
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setting up, as an access system between the access point and the station, a CDMA (Code Division Multiple Access) system using a plurality of spread codes for spreading the information signal; maintaining transmission power at a guaranteed level below spread semi-fixed level for the information signal; selecting, in accordance with a kind and an amount of the information signal, a frequency band and a frequency to be assigned to the information signal and a structure of a packet for transmitting the information signal; and transmitting the information signal in accordance with a transmission procedure; and storing a particular frequency band and a particular frequency to be used, and other information assigned to each kind of information in advance, in said step of selecting, the stored frequency band and the frequency matching with a kind and a quality of data as well as the processing procedure being read out, and each of voice and data being processed as the information signal based on readout information. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification