Back to results
US 2011/0299487 A1Published application
Broadcasting method and radio apparatus
AssigneeSanyo Electric Co., Ltd.
InventorsKiyoshige Ito, Makoto Nagai
Life of this patent
Estimating the term…
Abstract
A processing unit sets the time interval before packet signals are broadcast, using a carrier sense multiple access (CSMA) scheme. A modem unit and an RF unit broadcasts the packet signals at the time intervals set by the processing unit. The RF unit and the modem unit receive a control signal broadcast from an access control apparatus at a predetermined frequency. The processing unit sets the time interval, during which the control signal is receivable, to a time length shorter than the time interval for the remaining cases.
Claims7
A radio apparatus, comprising:
- a control unit configured to set a time interval before a packet signal is broadcast, using a carrier sense multiple access (CSMA) scheme;
- and
- a communication unit configured to broadcast the packet signal at the time intervals set by said control unit,
- wherein said communication unit receives a control signal broadcast from an access control apparatus at a predetermined frequency, the access control apparatus controlling communications between radio apparatuses, and
- wherein said control unit sets a time interval, during which the control signal is receivable by said communication unit, to a time length shorter than the time interval for the remaining cases.
2 more elements
A radio apparatus, comprising:
- a detecting unit configured to detect a slot, which is usable for the communications between a plurality of other terminal apparatuses, from among a plurality of slots in a first period of a frame containing the first period and a second period, wherein it is specified in a manner such that the frame containing the first period formed by the plurality of slots and the second period having a predetermined length is repeated;
- and
- a broadcasting unit configured to broadcast information on the slot detected by said detecting unit,
- wherein in the second period in said detecting unit, a carrier sense multiple access (CSMA) scheme is used by the plurality of other radio apparatuses, and
- wherein said broadcasting unit further broadcasts a parameter used to derive a time interval before a transmission using the CSMA scheme, and the time interval derived by the parameter being broadcast is set to a time length shorter than the time interval derived by the parameter stored beforehand in the plurality of other radio apparatuses.
2 more elements
A broadcasting method, comprising:
- setting a time interval before a packet signal is broadcast, using a carrier sense multiple access (CSMA) scheme;
- and
- broadcasting the packet signal at the time intervals set by said setting,
- wherein said setting is such that a time interval, during which a control signal broadcast from an access apparatus at a predetermined frequency is receivable, to a time length shorter than the remaining time interval, the access control apparatus controlling communications between radio apparatuses.
1 more element
A broadcasting method, comprising:
- detecting a slot, which is usable for the communications between a plurality of other terminal apparatuses, from among a plurality of slots in a first period of a frame containing the first period and a second period, wherein it is specified in a manner such that the frame containing the first period formed by the plurality of slots and the second period having a predetermined length is repeated;
- and
- broadcasting information on the detected slot,
- wherein in the second period in said detecting, a carrier sense multiple access (CSMA) scheme is used by the plurality of other radio apparatuses, and
- wherein said broadcasting further broadcasts a parameter used to derive a time interval before a transmission using the CSMA scheme, and the time interval derived by the parameter being broadcast is set to a time length shorter than the time interval derived by the parameter stored beforehand in the plurality of other radio apparatuses.
2 more elements
Dependencies are inferred from the claim text.