摘要:
A method, apparatus and computer program product are provided to facilitate synchronization of one or more stations with an access point when the stations have awakened from a sleep period. In the context of a method, a channel switch announcement is caused to be provided on a first channel that indicates that an access point is to switch to a second channel. The method also provides for the access point to switch to the second channel and, following switching of the access point to the second channel, the method causes a post-announcement to be provided on the first channel indicating that the access point previously switched to the second channel.
摘要:
There is provided a mechanism for controlling a transmission of data in a fragmentation transmission mode. When fragments are transmitted in a fragmentation transmission mode, it is determined whether the fragment frame is received successfully or whether an acknowledgment message for confirming a successful transmission of the fragment frame is received. In case the acknowledgment for the successful transmission of the one fragment frame is not received, or the fragment is frame is not successfully received, the fragmentation transmission mode is maintained and a retransmission of the fragment frame is initiated.
摘要:
The invention allows fairness provision in wireless mesh networks with respect to the data rate that stations communicate. A fairness metric is obtained during a mesh profile negotiation performed in order for a wireless station to join a wireless mesh network. Predetermined mesh transmission parameters of the wireless station are sent to previously joined wireless stations in a predetermined neighborhood of the wireless station. From the previously joined wireless stations their respective predetermined mesh transmission parameters are received. In response to a first predetermined event, a transmission opportunity window is determined for the wireless station based on the obtained fairness metric, the predetermined mesh transmission parameters of the wireless station, and the predetermined mesh transmission parameters of the previously joined wireless stations.
摘要:
The invention allows fairness provision in wireless mesh networks with respect to the data rate that stations communicate. A fairness metric is obtained during a mesh profile negotiation performed in order for a wireless station to join a wireless mesh network. Predetermined mesh transmission parameters of the wireless station are sent to previously joined wireless stations in a predetermined neighborhood of the wireless station. From the previously joined wireless stations their respective predetermined mesh transmission parameters are received. In response to a first predetermined event, a transmission opportunity window is determined for the wireless station based on the obtained fairness metric, the predetermined mesh transmission parameters of the wireless station, and the predetermined mesh transmission parameters of the previously joined wireless stations.
摘要:
There is provided a mechanism for controlling a transmission of data in a fragmentation transmission mode. When fragments are transmitted in a fragmentation transmission mode, it is determined whether the fragment frame is received successfully or whether an acknowledgment message for confirming a successful transmission of the fragment frame is received. In case the acknowledgment for the successful transmission of the one fragment frame is not received, or the fragment is frame is not successfully received, the fragmentation transmission mode is maintained and a retransmission of the fragment frame is initiated.
摘要:
A wireless device operates in a first mode in which the device can send data to and receive data from an access point. The device receives control data from the access point comprising first data indicative of a time period and second data indicative of a control parameter. The device operates in a second mode for the time period specified by the first data and on the basis of the control parameter. In the second mode, at least some circuitry of the device used for sending data and at least some circuitry of the device used for receiving data is placed in a low power state, and data to be sent to the access point is stored in a buffer of the device. After expiry of the time period, the device operates in the first mode to send the data stored in the buffer to the access point.
摘要:
Exemplary embodiments are concerned with method of controlling transmission of a set of transmissions from a source device to at least one destination device according to a multicast transmission scheme, the set of transmissions including random linear network coded packets that are to be multicast by the source device to the destination devices. These embodiments differ from this conventional approach in that the number of packets that are encoded for multicast transmission or the rate of transmission thereof is configured using feedback from the destination devices regarding their progress in decoding a previously multicast set of transmissions.
摘要:
One embodiment of the invention provides a method for determining a back-off window value for accessing a transmission channel. The method comprises receiving, at a first wireless node, a first set of time-varying parameters for at least one second wireless node; and using, by the first wireless node, the received first set of time-varying parameters at least partially and a second set of time-varying parameters of the first wireless node in determining a back-off window value for the first wireless node for accessing the transmission channel.
摘要:
There is provided a mechanism usable for allocating resources and provide control information about a signal to be transmitted by a communication network element such as a D2D device on resources which may be pre-allocated or allocated directly for the signaling. A resource allocation information element is generated which indicates to resources being allocated to a specific communication function, such as D2D. A content or value of a resource allocation field indicates a control information usable for forming a signal to be transmitted via the indicated resources. By means of the value of the resource allocation field, the D2D device derives a signal characteristic or the like of the signal to be transmitted on the indicated resources. The resource indication may be implicit in the form of an indication of a pre-allocated resource, or direct by indicating a dedicated resource.
摘要:
A wireless device operates in a first mode in which the device can send data to and receive data from an access point. The device receives control data from the access point comprising first data indicative of a time period and second data indicative of a control parameter. The device operates in a second mode for the time period specified by the first data and on the basis of the control parameter. In the second mode, at least some circuitry of the device used for sending data and at least some circuitry of the device used for receiving data is placed in a low power state, and data to be sent to the access point is stored in a buffer of the device. After expiry of the time period, the device operates in the first mode to send the data stored in the buffer to the access point.