Nokia Technologies Oy

Sharp Kabushiki Kaisha Corporation

Sharp Laboratories of America, Inc

Nokia Corporation

Huawei Technologies Co., Limited

Sayantan Choudhury

Klaus Franz Doppler

Chittabrata Ghosh

John Michael Kowalski

Ahmad Khoshnevis

Kimihiko Imamura

Esa Juhani Tuomaala

Shohei Yamada

Zhanping Yin

Taejoon Kim

Fuad Mousse Abinader, Jr

Erika Portela Lopes De Almeida

Andre Mendes Cavalcante

Kenneth James Park

Enrico-Henrik Rantala

Zhong-Yi Jin

Robson Domingos Vieira

Wessam Afifi Ahmed

Fabiano Chaves

Sarabjot Singh

Amitav Mukherjee

Hongkun Li

Mika Kasslin

Fabiano De Sousa Chaves

Hossein Ali Safavi Naeini

Namyoon Lee

Janne Marin

Olli Alanen

Jarkko Kneckt

Lizhong Zheng

Klaus Doppler

Sumit Roy

Mika Ilkka Tapani Kasslin

Krishna Garikipati

Eric Torkildson

Esa Tuomaala

Robson Vieira Domingos

Erika Portela Lopes De Almeidaq

Fuad Mousse Abinader Jr

Fuad Mousse Abinader Junior

A wireless network having one or more access points and one or more stations may improve spectrum efficiency for uplink transmissions by assigning a plurality of stations to a channel (or subchannel), each with a different priority. A channel may be assigned to a first station with the first priority, a second station with a second priority, and so on (e.g., instead of assigning the channel to just one station). An access point may transmit information indicative of the channel assignments, priorities, and other information used by stations to perform uplink transmissions. If a station with the highest priority receives the data from the access point, it may start transmission. A station with a lower priority may listen, during a listening period, to the same channel and determine whether the higher priority station started transmission during the listening period. If the higher priority station did not start transmission during the listening period, the lower priority station may transmit uplink data to the access point.

Spectrum efficiency for uplink wireless communications

A wireless communication device may autonomously transition from a multiple antenna port mode to a single antenna port mode. The wireless communication device may implicitly notify a base station about the autonomous transition from the multiple antenna port mode to the single antenna port mode. The base station may reallocate resources that were previously allocated to the wireless communication device but that are no longer being used by the wireless communication device. In some cases, the base station may configure the wireless communication device's antenna port mode via radio resource control signaling.

Antenna port mode and transmission mode transition

This document discloses a solution for carrying out narrowband communications in a wireless network. According to an aspect, a method comprises in an apparatus: detecting at least one content notification message indicating contents of each of a plurality of messages frequency-multiplexed with a discovery message to parallel sub-channels of a channel in a bi-directional wireless network; selecting autonomously a sub-channel on the basis of the detected content notification message; and acquiring a message through the selected sub-channel.

Multiplexed messaging in wireless network

One embodiment is directed to a method comprising selecting a group of packets for at least one access category, determining a set of contention parameters based on the at least one access category, transmitting the selected group of packets by using the determined set of contention parameters, obtaining information about collision of the transmitted group of packets, and determining an updated set of contention parameters based on the obtained collision information and a predefined condition.

Apparatus and method for selection of enhanced distributed channel access parameters for OFDMA

An access point in a random access wireless network is presented, which performs medium access control for transmissions from a plurality of stations to the access point using a carrier sense multiple access protocol. The CSMA protocol is based on the access point having a variable sensitivity level to detecting other transmissions on a wireless channel in order to avoid data collisions. In a dense network environment, the sensitivity level can be reduced to avoid detecting transmissions to other access points, and thus improve area efficiency.

Sensitivity tuning in wireless networks

When contending for access to a radio channel (for example CSMA/CA in Wi-Fi), an apparatus selects a first clear channel assessment (CCA) threshold that is higher than a minimum; determines to temporarily use a second CCA threshold that is lower than the first CCA threshold; and based on this determination it selects the second CCA threshold for a specified time period. In one embodiment this determination is based on the apparatus' use of a spectrum relative to a threshold usage level which may be calculated as a number of successful transmissions by the apparatus on the spectrum over a predefined time period; and/or as a deferring time experienced by the apparatus with respect to the spectrum over a predefined time period. In an embodiment the specified time period comprises a backoff time, and the determination to temporarily use the second CCA threshold is triggered by a periodic timer.

Fairness in wireless networks with adaptive clear channel assessment thresholds

One embodiment is directed to a method comprising sensing, by an apparatus, a shared channel; determining whether the shared channel is free; determining whether a synchronization signal has been received; and based on that the shared channel is determined free and the synchronization signal is determined received, beginning to access the shared channel.

Apparatus and method for channel access for long term evolution nodes in unlicensed band

Uplink data indication transmission(s) are received over a subband and over OFDM symbol(s) from STA(s) in a wireless communication system. The received uplink data indication transmission(s) are decoded to determine a unique codeword for each of the STA(s). From the determined unique codewords and using a mapping between station IDs and codewords in a codebook, a unique station ID is determined for each of the STA(s). For STA(s) determined to have sent the uplink data indication, other operations are performed to prepare for subsequent reception of uplink data from the STA(s) determined to have sent the uplink data indication.

Efficient uplink data indication techniques for MIMO-OFDMA transmission in  WLAN

A method for reporting uplink control information (UCI) on a user equipment (UE) is described. A collision of multiple channel state information (CSI) reports corresponding to multiple component carriers (CCs) that are scheduled to be reported in the same subframe is detected. A highest priority CSI report of the multiple CSI reports is determined using a prioritization scheme. The highest priority CSI report is transmitted.

Prioritizing multiple channel state information (CSI) reporting with carrier aggregation

Antenna port mode and transmission mode transitions

Methods, apparatus and program products are disclosed for allowing wireless devices in two wireless access networks whose coverage areas overlap to communicate with their respective access nodes. Groups may be assigned to wireless devices in the access networks and the groups may be used by wireless devices in the access networks to determine whether to access a communication medium or not. Received powers may also be used by wireless devices in the access networks to determine whether or not to access a communication medium. A wireless device in a first access network can determine whether to access (e.g., compete for access to) the communication medium by comparing a measured power of transmission from a second access node with an indication of a minimum received power above which wireless devices in a second access network formed by a second access node are allowed to contend for access to the communication medium.

Solving exposed terminal problems in wireless networks

This document discloses a solution for determining a channel assessment threshold in an apparatus. A method according to this solution includes: determining, by the apparatus, a channel assessment threshold based on a factor representative of a signal-to-interference ratio at another apparatus with which said apparatus has established a link; determining, by the apparatus on the basis of the channel assessment threshold, whether or not a channel is free for transmission over the link; and upon determining the channel to be free, causing transmission of a frame.

Procedure for setting threshold for accessing channel

Methods, apparatuses, and computer programs for assigning measurement groups in a wireless network are disclosed. The measurement group may be announced by measurement group information comprised in a broadcast message transmitted in the wireless network. Reporting may be triggered by transmission of a request-to-report message transmitted in the wireless network.

Performing measurements in wireless network

Growing community of inventors

Berkeley, CA, United States of America

Sayantan Choudhury