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US 9,521,556 B2Granted
Communication method using direct link in wireless network and apparatus therefor
AssigneeSamsung Electronics Co., Ltd.
InventorsHo Jin, Kyung-ik Cho
Life of this patent
Estimating the term…
Abstract
A communication method using a direct link in a wireless network and an apparatus therefor are provided. Accordingly, it is determined whether the quality of a link channel is lower than a level during communication using the direct link or whether a signal which is received through the channel includes a radar signal, and the direct link channel is selectively changed to a new channel based on the determination result.
Claims26
A communication method in a wireless network using a direct link by a first device, the method comprising:
- determining whether a quality of a direct link channel is lower than a predetermined level, during communication using the direct link;
- requesting an access point to allocate an available channel when it is determined that the quality of the direct link channel is lower than the predetermined level;
- and
- changing the direct link channel from the direct link channel to a second direct link channel, allocated by the access point in response to the request for the available channel,
- wherein the wireless network includes the access point that controls the wireless network and the communication using the direct link is direct communication between the first device and a second device communicating with each other on the wireless network using the direct link without transmitting data through the access point, and
- wherein the determining whether the quality of the direct link channel is lower than the predetermined level comprises:
- determining whether a predetermined number of frames having an averaged received signal strength indication (RSSI) less than a threshold occur during a period of time;
- or
- determining whether a number of successive retrials per a number of frames in a period of time exceeds a predetermined retrial limit.
6 more elements
A station in a wireless network using a direct link, the station comprising:
- a channel analyzer which determines whether a quality of a direct link channel is lower than a predetermined level, during communication using a direct link;
- a frame generator which generates a frame that instructs an access point to allocate an available channel when it is determined that the quality of the direct link channel is lower that the predetermined level;
- and
- a frame transceiver which transmits the frame generated by the frame generator to the access point,
- wherein the direct link channel is changed to a second direct link channel allocated by the access point and the wireless network includes the access point that controls the wireless network and the direct link channel is a communication channel using the direct link over which the station and the second device communicate with each other on the wireless network using the direct link without transmitting data through the access point, and
- wherein the channel analyzer determines whether the quality of the direct link channel is lower than the predetermined level by:
- determining whether a predetermined number of frames having an averaged received signal strength indication (RSSI) less than a threshold occur during a period of time;
- or
- determining whether a number of successive retrials per a number of frames in a period of time exceeds a predetermined retrial limit.
6 more elements
An access point in a wireless network using a direct link, the access point comprising:
- a frame transceiver which receives a channel change request frame from a first device when a quality of a direct link channel between the first device and a second device is lower than a predetermined level, transmits the channel change request frame including channel number to the second device and retransmits a channel change response frame, received from the second device, in response to the channel change request frame, to the first device;
- a channel manager which scans available channels of the wireless network;
- a channel number recorder which records a channel number in the received channel change request frame based on the scanned available channels;
- and
- wherein the access point controls the wireless network and the communication using the direct link is direct communication between the first device and the second device communicating with each other on the wireless network using the direct link without transmitting data through the access point, and
- wherein the quality of the direct link channel is determined to be lower than the predetermined level according to:
- whether a predetermined number of frames having an averaged received signal strength indication (RSSI) less than a threshold occur during a period of time;
- or
- whether a number of successive retrials per a number of frames in a period of time exceeds a predetermined retrial limit.
6 more elements
A communication method in a wireless network using a direct link by an access point, the method comprising:
- receiving a channel change request frame from a first device when a quality of a direct link channel between the first device and a second device is lower than a predetermined level;
- recording a channel number in the channel change request frame by analyzing available channels on the wireless network in response to the received channel change request frame;
- transmitting a channel change request including channel number to the second device;
- and
- retransmits a channel change response frame received from a second device, in response to the channel change request frame, to the first device,
- wherein the access point controls the wireless network and the communication using the direct link is direct communication between the first device and the second device communicating with each other on the wireless network using the direct link without transmitting data through the access point, and
- wherein the quality of the direct link channel is determined to be lower than the predetermined level according to:
- whether a predetermined number of frames having an averaged received signal strength indication (RSSI) less than a threshold occur during a period of time;
- or
- whether a number of successive retrials per a number of frames in a period of time exceeds a predetermined retrial limit.
7 more elements
Dependencies are inferred from the claim text.