Telefonaktiebolaget Lm Ericsson (publ)

Behrooz Makki

Ali Behravan

Mona Hashemi

Mikael Coldrey

Lei Bao

Boris Dortschy

Erik Bengt Dahlman

Henrik Sahlin

Magnus Åström

Zhipeng Lin

Per-Erik Eriksson

Yezi Huang

Muhammad Ali Kazmi

Robert Baldemair

Andres Reial

Andreas Nilsson

Robert Mark Harrison

Jose Luis Pradas

Jingya Li

Thomas Chapman

Chunhui Zhang

A method, system and network node are disclosed. According to one or more embodiments, a parent network node configured to communicate with a network node is provided. The parent network node is configured to, and/or includes a radio interface and/or includes processing circuitry configured to: enable a first timing configuration, wherein the first timing configuration enables downlink transmission timing for the network node to be aligned with the downlink transmission timing of the parent network node; and based on the first timing configuration, switch to a second timing configuration, wherein the second timing configuration enables uplink transmission timing of the network node to be aligned with the downlink transmission timing of the network node.

IAB Case-6 timing and adjustment

A method, system, network nodes and apparatus are disclosed. According to one or more embodiments, a donor integrated access backhaul, IAB, node configured with a distributed unit, DU, for communicating with a wireless device and configured with a central unit, CU, for communicating with at least a first child IAB node is provided. The donor IAB node includes processing circuitry configured to indicate a determined first synchronization signaling blocks, SSB, transmission configuration, STC, for the at least first child IAB node, to the at least first child IAB node where the first STC is associated with inter-node measurement.

IAB-CU managed time-pattern configuration for IAB inter-node measurement

The present disclosure relates to a node (AP, U) in a wireless communication system (), where the node (AP, U) is adapted to communicate with at least two other nodes (AP, AP) in the wireless communication system (), and where the other nodes (AP, AP) are first type nodes (AP, AP) which are adapted to communicate with each other by means of backhaul communication. The node (AP, U) is adapted to receive a signal (xA) transmitted from an adjacent first type node (AP), where the (xA) has been forwarded from at least one farther first type node (AP). In case of unsuccessful decoding of the signal (xA), the node (AP, U) is adapted to request re-transmission (NACK) of the signal (xA), and to receive a re-transmission of the signal (xA) directly from a farther first type node (AP).

Handling of re-transmissions in a wireless communication network

Performing random access process. In one aspect, there is a method performed by a network function. The method comprises the network function generating system information and the network function broadcasting the system information. The system information comprises i) first power information for use by at least a first set of communication devices and a second set of communication devices in determining a transmit power, and ii) second power information for use by the first set of communication devices, but not the second set of communication devices, in determining the transmit power.

Random access channel (RACH) process for integrated access and backhaul (IAB) networks

A method and network node having integrated access and backhaul (IAB) functionality are disclosed. According to one aspect, a network node determines information concerning at least one of: (i) an impairment of a first signal from a first integrated access backhaul node that is caused by a second signal from a second IAB node and (ii) an impairment of the second signal that is caused by the first signal. The network node further selects a multiplexing capability for the network node based at least in part on the determined information concerning at least one of the impairments and further multiplexes signals for the first and second IAB nodes using the selected multiplexing capability.

Method to determine the capability of simultaneous operation in IAB nodes

Methods and nodes in an integrated access and backhaul (IAB) network. A method in a node in an IAB network for selecting a preferred route from a plurality of candidate routes for sending data from a first node to a second node in the IAB network is provided. Each candidate route includes at least one intermediate node between the first node and the second node. The method includes, for each candidate route, determining a predicted transmission delay associated with sending the data along the respective candidate route based on channel measurements between nodes along the respective candidate route and an error probability constraint, wherein the transmission delay is predicted for a transmission of the data that satisfies the error probability constraint in view of the channel measurements. The method further selecting a route from the plurality of candidate routes for sending the data based on the predicted transmission delays.

Multiroute integrated access and backhaul networks

The present disclosure relates to a first type node (AP1) in a wireless communication system, wherein the first type node (AP1) is adapted to: communicate with at least one neighboring first type node (APO, AP2) via a corresponding backhaul channel (H10, H21); receive communication from at least one overheard second type node (U3k) via a corresponding overheard access channel (h3k_1), the overheard second type node (U3k) being adapted to normally communicate with a serving first type node (AP3); instruct at least one overheard second type node (U3k) to pause transmission to the serving first type node (AP3) at time instants (T+2) when the first type node (AP1) is going to receive a certain signal (x3k(T)) from the neighboring first type node (AP2), where the certain signal (x3k(T)) is intended to be received by the first type node (AP1) without interference from said overheard second type node (U3k).

Relaying in a wireless communication network

The present disclosure relates to a first type node (AP) in a wireless communication system (), wherein the first type node (AP) is adapted to: —communicate with at least one other first type node (AP) in the wireless communication system () over a corresponding backhaul channel (H) by means of one of at least one type of signal relaying that employs decoding and encoding, and —communicate with a corresponding group of second type nodes (U, U) via a corresponding access channel (h, h), each group of second type nodes (U, U) comprising at least one second type node (U, U). In the case of a backhaul channel (H') between the first type node (AP) and one other first type node (AP) being determined to be blocked to a certain degree, the first type node (AP) is further adapted to instruct at least one second type node (U) of the second type nodes in the group of second type nodes (U, U) that is comprised in an over-heard sub-group, to communicate directly with an overhearing first type node (AP) via a corresponding access channel (h).

There is provided mechanisms for handling a deteriorating AP-to-AP wireless link in an IAB network. A method is performed by a first AP in the IAB network. The method comprises identifying signal deterioration of a first AP-to-AP wireless link between the first AP and a second AP in the IAB network. The first AP-to-AP wireless link is used for backhauling data for CPEs served by the second AP and for backhauling data for CPEs served by a third AP in the IAB network. The second AP has a second AP-to-AP wireless link to the third AP for backhauling data for the CPEs served by the third AP. The method comprises, in response thereto, relaying the data via a first CPE of the CPEs served by the second AP on a first direct wireless link between the first AP and the first CPE.

Handling of deteriorating AP-to-AP wireless link

A method in a communication network. The method includes a first network node receiving a first combined signal comprising a first message transmitted by a first UE and a second message transmitted by a second UE. The method includes the first network node decoding the first message. The method includes the first network node using a backhaul link to transmit the decoded first message to a second network node that receives a second combined signal comprising the first message and a third message transmitted by a third UE.

Fairness and complexity constrained uplink transmission using coordinated multipoint (CoMP) non-orthogonal multiple access (NOMA)

The present disclosure relates to a serving wireless communication node adapted to predict data files (A, B, C) to be requested by at least two served user terminals () and to form predicted sub-data files (A, A; B, B; C, C). In a placement phase, the serving node is adapted to transmit predicted sub-data files (A, B; A, B) to cache nodes (AP, AP), each cache node (AP, AP) having a unique set of predicted different sub-data files of different predicted data files, and to receive requests (RA, RB) for data files from the served user terminals (). In a delivery phase, the serving node is adapted to transmit an initial complementary predicted sub-data file (Formula I) to the cache nodes (AP, AP), comprising a reversible combination of the remaining predicted sub-data files (A, B) for the files requested. If a cache node (AP, AP) requests re-transmission (RA; RB) of a predicted sub-data file (A, B), the serving node (AP) is adapted to transmit a further complementary predicted sub-datafile (Formula II) to the cache nodes (AP, AP), the file comprising a reversible combination of at least one re-transmitted predicted sub-data file (A, B) and at least one new predicted sub-data file (C).

Coded-caching in a wireless communication network

A first type node (AP, AP, AP) in a wireless communication system (), wherein the first type node (AP, AP, AP) is adapted to: &#x2014;communicate with at least one other first type node (AP, AP, AP) in the wireless communication system () over a corresponding channel (h, h), and &#x2014;transmit a first plurality of signals (x, x, X, X, X, X) to the other first type node (AP, AP, AP). In the case of the other first type node (AP, AP, AP) requesting re-transmission of a failed signal (x) in the first plurality of signals (x, x', X, X, X, X), the first type node (APo, AP, AP) is further adapted to: &#x2014;receive a limit of tolerable interference from the other first type node (APo, APi, AP), and &#x2014;re-send the failed signal (xn) in a second plurality of signals (x, x&#x2032;x&#x2032;, X&#x2032;, X&#x2032;, X&#x2032;, X&#x2032;, X; X, x&#x2032;, x&#x2032;, X&#x2032;, x&#x2032;, x&#x2032;, X) to the other first type node (AP, AP, AP) while sharing the spectrum for the failed signal (x) with an additional signal (x&#x2032;) without exceeding the limit of tolerable interference.

The present disclosure relates to a first type node in a wireless communication system, wherein the first type node is adapted to: communicate with at least one other first type node in the wireless communication system over a corresponding channel receive a plurality of signals, each signal being associated with a corresponding decoding error probability, from the other first type node estimate the decoding error probability for each signal sort the signals in a decoding order according to the estimated decoding error probability, decode the signals one at the time from the lowest estimated decoding error probability to the highest estimated decoding error probability until decoding for a certain signal is determined to have failed, request re-transmission of the signal for which decoding has been determined to have failed, and to request re-transmission of all signals having higher decoding error probability than the signal for which decoding has been determined to have failed.

The present disclosure relates to a method and an apparatus for multiple access transmission. The method includes: determining (S) a first signature allocated to a first transmission; and determining (S) a second signature allocated to a second transmission. With hopping of the signature, the successful rate of NOMA transmission in the communication system will be improved.

Method and apparatus for multiple access transmission

An adaptive receiver for UEs using NOMA-based schemes. One objective is to improve the achievable rate of the weak UE and improve the fairness among the grouped UEs. At the same time, an embodiment gives the chance to reduce the error probability of the strong UE. Thus, compared to conventional NOMA, an embodiment increases the network sum throughput.

Growing community of inventors

Gothenburg, Sweden

Behrooz Makki