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US 8,713,675 B2Granted
Method and apparatus for the prevention of a service degradation attack
AssigneeNtt Docomo, Inc.
InventorsAlf Zugenmaier, Guido Dietl
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AssigneeNtt Docomo, Inc.
InventorsAlf Zugenmaier, Guido Dietl
Estimating the term…
In a wireless communication system where the data transmission is optimized with respect to the channel state information fed back by the users, a service degradation attack can be made by feeding back faked channel state information. A method for preventing a service degradation attack on a first wireless communication device by a second wireless communication device in a wireless communication system, said method comprising: verifying by a base station whether the channel state information sent to the base station by the second wireless communication device corresponds to its real channel.
A method for preventing a service degradation attack on a first wireless communication device by a second wireless communication device in a wireless communication system, said method comprising:
A method for preventing a service degradation attack on a first wireless communication device by a second wireless communication device in a wireless communication system, said method comprising:
The method according to any of the preceding claims further comprising:
An apparatus for preventing a service degradation attack on a first wireless communication device by a second wireless communication device in a wireless communication system, said apparatus comprising:
An apparatus for preventing a service degradation attack on a first wireless communication device by a second wireless communication device in a wireless communication system, said apparatus comprising:
Dependencies are inferred from the claim text.
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Concatenated codes: serial concatenated codes
Feedback content: channel coefficients, e.g. channel state information [CSI]
Feedback error handling: at the transmitter, e.g. error detection at base station
By using forward error control: arrangements at the transmitter end
About 4 years 11 months of term left · ends 25 Sep 2031 (estimated)
The present invention relates to a method and an apparatus for the prevention of a service degradation attack.
In particular, the present invention relates to a mechanism for the prevention of intentional performance degradation.
In a wireless communication system, a base station normally communicates with multiple users that are attached to it. The base station transmits data to the individual users by scheduling them on the available radio resources such as time slots and frequency bands.
FIG. 1 schematically illustrates an example of intentional performance degradation.
FIG. 2 schematically illustrates another example of intentional performance degradation.
FIG. 3 schematically illustrates a flowchart of preventing intentional performance degradation according to one embodiment of the invention.
As described in the background section, in an attack scenario an attacker can feed back arbitrary channel state information in current systems. By feeding back faked channel state information, the attacker can negatively affect scheduling as well as degrade system performance.
As one concrete example, the attacker sends the faked channel state information that indicates very good channel qualities. Thus, the base station aiming at maximizing the data throughput schedules the attacker more frequently than other users.
As another possible example, the attacker sends the faked channel state information that is equal to the channel state information of the victim. Thus, high interference is created to the victim when the base station schedules the attacker.