Apple Inc.

Lantiq Israel Ltd.

Koby Vainapel

Yoel Boger

Guoqing Li

Leor Kehaty

Yong Liu

Micha Anholt

Ido Shani

Marcelo Senter

Su Khiong Yong

Tianyu Wu

Jarkko L Kneckt

Lawrie Kurian

Tashbeeb Haque

Michael Kerner

Ran Katz

Lilach Zukerman

Shay Gershoni

Gilad Kirshenberg

Eran Gerson

Yaniv Dvory

Koby Levy

Hay Lev

Yigal Eliaspur

The subject technology provides for block acknowledgment requests and block acknowledgment frames that can be used in conjunction with multicast transmissions that include multiple concurrent streams. Thus, the subject technology reduces the overhead associated with multicast transmissions that include multiple concurrent streams by aggregating the acknowledgments across multiple streams into a block acknowledgment, thereby increasing the effective throughput of such transmissions and overall network efficiency.

Block acknowledgment for a multicast transmission with multiple concurrent streams

This disclosure relates to transmitting multicast information over a network, such as a wireless local area network (WLAN). A source device may transmit a multicast and a request for feedback to a plurality of sink devices. The sink devices may transmit feedback based on whether they successfully decoded the multicast. The source device may retransmit the multicast (or a portion thereof) based on the feedback.

Scalable and reliable multicast protocols

Some embodiments enable improved packet error rate (PER), signal to noise ratio (SNR), channel capacity, aggregated throughput, and communication range in wireless communication systems. For example, an electronic device includes a buffer that stores a first descrambled bit estimate sequence. The electronic device further includes an encoder that receives a descrambling sequence and generates an encoded descrambling sequence and a multiplier circuit that receives a bit estimate sequence and the encoded descrambling sequence and generates a second descrambled bit estimate sequence. The electronic device also includes an adder circuit that combines the first descrambled bit estimate sequence and the second descrambled bit estimate sequence and a decoder that decodes the combined descrambled bit estimate sequence.

Apparatus and method for WLAN range extension

A wireless device can perform Out-of-Order packet processing and block acknowledgement. Multiple packets may be received at a lower layer of the wireless device. Identifying information may be determined for the received packets. It may be determined that the packets were received out of sequential order, based at least in part on the identifying information. Despite being received out of sequential order, payload information from the packets may be provided to a higher layer of the wireless device in a non-sequential order, such as the order of receipt.

Block acknowledgement with out-of-order packets

This disclosure relates to wireless communication techniques. According to some embodiments, a wireless device may select a random number and sequentially advertise the bits of the random number. If the wireless device advertises the highest random number, it may proceed to transmit a packet using a channel. If another device advertises a higher number, the wireless device may not transmit its packet and may restart the process.

Enhanced Wi-Fi access protocol (EWAP)

Performing early termination of reception by a mobile station. The mobile station may receive a wireless transmission. The wireless transmission may include a physical layer (PHY) header, a media access control (MAC) header, and data. The mobile station may determine a duration and a destination address from the MAC header. The mobile station may determine if the wireless transmission is intended for the mobile station using the destination address. In response to determining that the wireless transmission is not intended for the mobile station, the mobile station may enter a low power mode prior to completion of the wireless transmission. The length of time of the low power mode may be based on the duration of the first wireless transmission.

Early termination of reception of wireless transmissions

Embodiments described herein relate to a system and method for improving a rate of success in receiving response packets, such as 802.11 Acknowledge (ACK), Block Acknowledge (BACK), and Clear-To-Send (CTS) packets. In one embodiment, a wireless device may transmit one or more first packets according to a wireless communication protocol, and may then receive a second packet. The wireless device may determine that the receiving follows the transmitting by a specific duration of time that is specified by the wireless communication protocol for a response packet to follow one or more communication packets to which it responds. Based at least in part on this determining, the wireless device may further determine that the second packet is a response packet responding to the one or more first packets, without decoding a portion of the second packet that identifies a packet type of the second packet.

Robust decoding of wireless LAN response packets

A method and a system for reducing computational complexity in a maximum-likelihood MIMO decoder, while maintaining its high performance. A factorization operation is applied on the channel Matrix H. The decomposition creates two matrixes: an upper triangular with only real-numbers on the diagonal and a unitary matrix. The decomposition simplifies the representation of the distance calculation needed for constellation points search. An exhaustive search for all the points in the constellation for two spatial streams t(1), t(2) is performed, searching all possible transmit points of (t2), wherein each point generates a SISO slicing problem in terms of transmit points of (t1); Then, decomposing x,y components of t(1), thus turning a two-dimensional problem into two one-dimensional problems. Finally searching the remaining points of t(1) and using Gray coding in the constellation points arrangement and the symmetry deriving from it to further reduce the number of constellation points that have to be searched.

Reducing computational complexity in maximum likelihood MIMO OFDM decoder

Growing community of inventors

Herzliya, Israel

Koby Vainapel