摘要:
The amount of information reported by a communication terminal apparatus to a communication control apparatus is reduced based on the congestion status of communication. Communication control 100 apparatus communicates with a communication terminal apparatus using frequency channels composed of two or more sub-channels defined by a predetermined frequency band includes: receiver 113 for receiving information data destined to the terminal apparatus; scheduler 113 for generating assignment information indicating the status of assignment of the received information data to each sub-channel; congestion information generator 103 for generating congestion information indicating the congestion degree of each sub-channel based on the generated assignment information; control information generator 104 for generating control information including the generated congestion information; and transmitter 111 for transmitting the generated control information to the terminal apparatus.
摘要:
Provided is a power control method, etc., in cognitive radio communication, by which power control can be effectively performed without a large indirect cost. In the power control method, a target value of SNR is estimated on the basis of the control information relating to interference. Subsequently, communication power used for the cognitive radio communication is adjusted on the basis of the estimated target value of SNR. Thereby, power control can be effectively performed without a large indirect cost.
摘要:
A resource management system, includes: a first monitoring part which monitors a state of a resource supplied from a first resource supply source; a first storage part which stores a first policy defining a first opening/closing signal corresponding to the state of the resource supplied from the first resource supply source; a first path control part which generates the first opening/closing signal based on a monitoring result of the first monitoring part and the first policy; a second monitoring part which monitors a state of a resource supplied from a second resource supply source; a second storage part which stores a second policy defining a second opening/closing signal corresponding to the state of the resource supplied from the second resource supply source; a second path control part which generates the second opening/closing signal based on a monitoring result of the second monitoring part and the second policy; a third monitoring part which monitors the state of the resource supplied from the first resource supply source; and a third path control part which generates at least one of the first and second opening/closing signals by controlling at least one of the first path control part and the second path control part based on a monitoring result of the third monitoring part.
摘要:
A first position and second position at first point in time and second point in time are specified, information on planned moving route starting from the first position is stored, an option list having options in different viewpoints are stored regarding frequency selection policies in selecting frequency to be used, the route information and the option list are transmitted to database, an information list on effective frequencies listed corresponding to respective points in the route information and the options is received from the database, it is determined to which point out of the points the second position is close, appropriate option is selected from the option list as policy to be applied, frequency listed in correspondence to the point close to the second position out of the points and the policy to be applied is selected from the effective frequency information list.
摘要:
To prevent communication interference between two or more wireless communication networks having mutually different physical layers. In a case where two or more wireless communication networks having mutually different physical layers coexist, and wireless communication is performed between a plurality of devices and a coordinator in each one of the wireless communication networks, the coordinator 3a of one wireless communication network 10a generates coexistence notification frame data used for notifying coordinators 3b of other wireless communication networks 10b of existence of the coordinator, encodes the generated coexistence notification frame data and inserts source data before the encoding into the encoded data as source code data so as to be set as FEC data, modulates the FEC data through a Gaussian frequency shifting keying system (GFSK) so as to be set as a GFSK modulated wave signal, and transmits the GFSK modulated wave signal to the coordinators 3b of the other wireless communication networks 10b.
摘要:
Provided is a data transmitting/receiving method capable of effectively suppressing power consumption. The data transmitting/receiving method includes: establishing synchronization between a master device and a slave device based on predetermined synchronization information that is transmitted from the master device or the slave device; setting a contention access period (CAP) between the master device and the slave device at predetermined timing based on the established synchronization; starting data transmission/reception between the master device and the slave device within the CAP; and extending the data transmission/reception even after the CAP in a case where the data transmission/reception does not end within the CAP.
摘要:
A plurality of consecutive frequency bands are used as a broadband and use efficiency thereof is improved. An available-frequency-band-information-list is retained such that the list is categorized into frequency-band-groups, each of the groups is a series of consecutive frequency bands, and a frequency-band-number-width is given to each of the groups. Determining a necessary-frequency-band-number, one group is selected from the groups whose width match the number as a first-type band group, when any of the width of each of the groups does not match the number, one group is selected from the groups whose width are next larger than the number as a frequency band group to be used, and a series of consecutive frequency bands corresponding to the number is selected from the frequency band group to be used as a second-type band group. Communication is controlled so as to use the first-type or the second-type band group.
摘要:
To prevent communication interference between two or more wireless communication networks that have mutually different physical layers. There is provided an interference preventing method, which prevents communication interference between two or more wireless communication networks having mutually different physical layers, of a wireless communication network in which wireless communication is performed between a plurality of devices 2 and a coordinator 3, wherein, by using a coordinator of each one of the wireless communication networks, a scanning period 26 for scanning a coexistence notification signal that is transmitted from a coordinator of another wireless communication network for a predetermined period is arranged before a first super frame immediately after input of power, the CB 27 of the coordinator is transmitted at least once or more for one super frame, and, in a case where the CB 27 transmitted from the coordinator 3 of the another wireless communication network is acquired during the scanning period 26, control for preventing communication interference with the another wireless communication network 10 is performed.
摘要:
This invention is directed to provision of a channel adjusting method capable of suppressing the occurrence of interference between a cognitive pilot channel (CPC) and an auxiliary control channel (ACS) in cognitive wireless communications. According to the inventive channel adjusting method for use in cognitive wireless communications, initially, a connection using a cognitive pilot channel (CPC) is set up. Thereafter, it is determined whether or not a spectrum sensing channel (ACS) is to be utilized. If yes, it is then determinedwhether or not any interference occurs between the spectrum sensing channel (ACS) and the set-up cognitive pilot channel (CPC) . This allows an adjustment to be performed such that no interference occurs between the cognitive pilot channel (CPC) and the spectrum sensing channel (ACS).
摘要:
In a cognitive radio communication device, before a communication link for the cognitive radio communication is established, a control channel which is a common channel which can be used by a plurality of cognitive radio communication devices is detected. By exchanging sensing information and sensing control information among the plurality of radio communication devices using the detected common channel, the information is shared. The plurality of cognitive radio communication devices share the sensing information and the sensing control information, and use the information for determining a channel used for spectrum monitoring and data communication, and the like.