Radio LAN system implementing simultaneous communication with different types of information and communication method for the same
AssigneeOki Electric Industry Co., Ltd.
InventorHiroshi Etoh
Life of this patent
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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.
Claims9
1-9. (canceled)
A method of transmitting an information signal by radio between an access point and a station present in a limited 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 of the information signal spread semi-fixed;
- 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.
Dependencies are inferred from the claim text.