Telefonaktiebolaget Lm Ericsson (publ)

André Mendes Cavalcante

Eduardo Lins De Medeiros

Igor Almeida

Miguel Berg

Elmar Trojer

Chenguang Lu

Daniel Cederholm

Keke Zu

Maria Valéria Marquezini

Igor Mesquita De Almeida

Eduardo Medeiros

Amadeu Nascimento Junior

A method performed by a system having a plurality of base station systems, each base station system comprising a baseband unit, BBU and a radio unit, RU interconnected via a fronthaul connection that is shared between the base station systems. Fronthaul capacity information on transmission capacity of the shared fronthaul connection and information on required capacity for transmission and/or reception of wireless signals by the RU of the respective base station system are obtained. Time unit transmission restrictions for the respective base station system is determined based on the fronthaul capacity information and on the information on required capacity, which time unit transmission restrictions results in fronthaul usage below the transmission capacity of the part of the fronthaul connection. Information on the determined time unit transmission restrictions is sent to the BBU of the respective base station system.

Methods, systems and baseband units for improved usage of shared fronthaul connections

Disclosed is a method performed by an access point, AP (), of a WLAN (), for handling a wireless device () connected to the AP (). The method comprises obtaining information on signal quality of signals sent between the AP () and the wireless device (), and when the obtained information on signal quality reveals that the signal quality is below a signal quality threshold, determining a current value of a wireless device characteristic. The method further comprises obtaining, from a pre-emptive handover system (), an estimation of a likelihood of the wireless device () disconnecting from the WLAN for the current value of the wireless device characteristic, wherein the likelihood was determined from statistical information of earlier handling of the wireless device () by the AP () for different values of the wireless device characteristics. Further, when the received estimation of likelihood is above a likelihood threshold, accelerating a handover process of the wireless device () connection from the AP () to a network node () of a cellular communication network ().

Methods, system and access point of a WLAN for handling a wireless device connected to an access point

Embodiments described herein relate to methods and apparatus for transmitting radio data over a fronthaul network. The method comprises receiving radio data for transmission over the fronthaul network; and translating the radio data between a time domain multiplexing protocol and packet based protocol before transmitting the data over the fronthaul network; wherein the step of translating comprises: receiving control information indicative of a level of congestion over a part of the radio network using the packet based protocol; and modifying the radio data during the step of translating to control the level of congestion.

Methods and apparatus for transmitting radio data over a fronthaul network

Methods and apparatus are provided for sending data using a packet-based interface to cause a radio unit to send transmissions to at least one UE. In an example aspect, a method includes determining that a packet for causing the radio unit to send transmissions to a first user equipment, UE, in at least a portion of a time interval allocated to the first UE for transmissions to the first UE will not reach the radio unit, and sending at least one further packet to the radio unit to cause the radio unit to send transmissions to a second UE in at least part of the time interval.

Sending data using a packet-based interface

Embodiments described herein relate to methods and apparatus for managing packet dropping in the fronthaul network. A method in a packet processing system includes receiving a plurality of data packets for transmission over the fronthaul network, wherein the plurality of data packets include radio data; obtaining first information for the plurality of data packets, wherein the first information is related to transmission of the radio data over a radio access interface in the radio network; and responsive to a requirement to decrease a load in the fronthaul network, selecting at least one of the plurality of packets to drop by applying at least one prioritization rule to the plurality of data packets based on the obtained first information.

Methods and apparatus for packet dropping in a fronthaul network

Embodiments presented herein relates to a method for saving power in remote radio heads (RRHs) of a wireless communication system. The method is performed in an RRH controller node associated with a plurality of RRHs or the same cell, each of the plurality of RRHs having at least a first antenna branch A of the cell and a second antenna branch B of the cell. The method comprises providing Sa first power saving indication to a first RRH of the plurality of RRHs, to inactivate its first antenna branch A, and providing Sa second power saving indication to a second RRH of the plurality of RRHs, to inactivate its second antenna branch B, wherein at least one antenna branch is kept active in the first and second RRH. RRH controller nodes, a computer programs and a computer program product for saving power in RRHs of a wireless communication system are also presented.

Saving power in remote radio heads

It is presented a method for determining packet loss in a fronthaul link of a radio access network. The method being performed in a packet loss determiner and comprising the steps of: obtaining a set of user equipments, UEs, that are all scheduled to communicate over a radio interface in a scheduling interval; creating a subset of UEs, comprising a number of UEs, from the set of UEs, that are the UEs in the set being most vulnerable to fronthaul packet loss; determining, for each UE in the subset of UEs, whether the communication in the scheduling interval was unsuccessful; and determining a packet loss in the fronthaul link depending on to what extent each one of the UEs in the subset of UEs is determined to have had unsuccessful use of the radio interface.

Determining packet loss in a fronthaul link

A method performed in a scheduler entity is provided for adapting load on a fronthaul network in a radio access network comprising a central baseband unit and a remote radio unit. The central baseband unit and the remote radio unit are interconnected by the fronthaul network over which baseband signal information is exchanged. The method comprises obtaining information related to capacity of the fronthaul network, and adapting, based on the obtained information, air interface performance for at least one type of conveyed baseband signal information such as to enable adapting of load on the fronthaul network. A scheduler entity, method in a fronthaul module, computer programs and computer program products are also provided.

Methods and devices for adapting load on a fronthaul network

It is provided a method for compressing beamspace coefficients to be applied when transferring data between a radio network node and a specific user device, the method being performed in a coefficient encoder and comprising the steps of: obtaining beamspace coefficients, wherein each beamspace coefficient comprises a complex value and a direction; determining at least one cluster based on proximity, in a complex plane, of the complex values of the beamspace coefficients; determining, for each beamspace coefficient, a cluster to which it belongs; determining a representative complex value for each one of the at least one cluster; outputting the representative complex values for each cluster; and outputting, for each beamspace coefficient, an identity of the cluster to which the beamspace coefficient belongs.

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Indaiatuba, Brazil

André Mendes Cavalcante