Qualcomm Incorporated

Other

Commscope Technologies LLC

Commscope, Inc of North Carolina

Gupta, Ajay

Alan Barbieri

Tingfang Ji

Peter S Gaal

Tao Luo

Hao Xu

Dario Fertonani

Madhavan Srinivasan Vajapeyam

Aleksandar Damnjanovic

Durga Prasad Malladi

Osok Song

Yongbin Wei

Naga Bhushan

Alexei Yurievitch Gorokhov

Stefan Geirhofer

Siddhartha Mallik

Vikas Jain

Rajat Prakash

Wanshi Chen

Ravi Palanki

Parag Arun Agashe

Ajay Gupta

Awaiz Ahmad Khan

Samatha Kotla

Balwinderpal Sachdev

Juan Montojo

Yi Huang

Taesang Yoo

Ahmed Kamel Sadek

Jilei Hou

Rahul Tandra

Mohammad Jaber Borran

Fang Frank Chen

Yichao Huang

Saikiran Nudurupati

Milos Jorgovanovic

V Sreekanth Annapureddy

Aleksandar Damjanovic

Muruganandam Jayabalan

Fang Chen

Ting-Fang Ji

Saikiran Nudurapati

One embodiment is directed to a device for fronthaul communication between a baseband unit (BBU) and a remote unit (RU). A processor of the device is configured to receive, using a first fronthaul interface of the device, fronthaul data originating from said first one of the BBU and the RU. The fronthaul data is formatted according to a first fronthaul protocol when received using the first fronthaul interface. The processor is further configured to format at least some of the fronthaul data received using the first fronthaul interface so as to be formatted according to a second fronthaul protocol thereby producing reformatted fronthaul data and forward, using a second fronthaul interface of the device, the reformatted fronthaul data towards said second one of the BBU and the RU.

Device for fronthaul communication between a baseband unit and a remote unit of a radio access network

A distributed radio frequency communication system includes a remote radio unit (RRU and a baseband unit (BBU) and facilitates communication between a wireless terminal and a core network. The RRU receives a radio frequency signal from a wireless terminal and convert the radio frequency signal to digital baseband samples using receiver circuitry and an analog-to-digital converter. The RRU then adaptively compresses the digital baseband samples, using adaptive compression circuitry, to create fronthaul uplink information, and sends the fronthaul uplink information over a fronthaul link to the BBU using an adaptive fronthaul protocol. The RRU also receives fronthaul downlink information over a fronthaul link from the BBU using an adaptive fronthaul protocol and generates frequency-domain samples, based on the fronthaul downlink information received. It then creates time-domain baseband samples from the frequency-domain samples and converts the time-domain baseband samples into a radio frequency signal to send to the wireless terminal.

Remote radio unit using adaptive compression in a distributed radio access network

Methods and systems for facilitating communication between a core network and a wireless terminal in an upper first-level protocol unit (UL) of a radio access network (RAN) as disclosed. An upper first level protocol unit (UL) performs a first portion of a first-level protocol of the RAN in a first apparatus and communicates over a fronthaul link with a lower first-level protocol unit (LL). The LLis in a second apparatus separate from the first apparatus. A communication quality parameter for communication between the first apparatus and the LLis determined, and a message related to the communication quality parameter is sent by the ULto an entity of the RAN other than the LL

Management of a split physical layer in a radio area network

A distributed radio frequency communication system facilitates communication between wireless terminals and a core network. The system includes a group of remote radio units (RRUs). Each RRU of the group of RRUs is coupled to an antenna to communicate with at least some of the mobile terminals and includes electronic circuitry to perform at least a first portion of a first-level protocol of a radio access network (RAN) and communicate over a fronthaul link. The system also includes a baseband unit (BBU) coupled to the core network and the fronthaul link, and communicably coupled to the group of RRUs over the fronthaul link. The RRU receives a synchronization-assisting radio-frequency signal and sends information derived from that signal to the BBU. The BBU processes the information to determine synchronization instructions which are then used to adjust a local clock in the RRU.

Synchronization of radio units in radio access networks

A distributed radio frequency communication system facilitates communication between wireless terminals and a core network. The system includes a group of remote radio units (RRUs). Each RRU of the group of RRUs is coupled to an antenna to communicate with at least some of the mobile terminals and includes electronic circuitry to perform at least a first portion of a first-level protocol of a radio access network (RAN) and communicate over a fronthaul link. The system also includes a baseband unit (BBU) coupled to the core network and the fronthaul link, and communicably coupled to the group of RRUs over the fronthaul link. The BBU includes electronic circuitry to assign one or more RRUs, selected from the group of RRUs, to a cluster of RRUs based on one or more parameters, and to perform at least a second-level protocol of the RAN.

Virtualization and orchestration of a radio access network

Certain aspects of the present disclosure provide various mechanisms that allow a user equipment to convey information regarding one or more attributes to a base station during a random access (RA) procedure. The attributes may include, for example a capability of the UE (e.g., to support a particular feature or version of a standard) or a condition of the UE (e.g., if it is currently experiencing an interference condition).

Random access procedure enhancements for heterogeneous networks

A method for providing multi-hypothesis channel quality indicator (MH-CQI) feedback is described. Hypotheses corresponding to rank indicator (RI) and precoding matrix indicator (PMI) assumptions associated with a dominant interferer are selected. Multi-hypothesis channel quality indicator (MH-CQI) values based on the selected hypotheses are generated. The multi-hypothesis channel quality indicator (MH-CQI) values are encoded. The multi-hypothesis channel quality indicator (MH-CQI) values are sent as feedback.

Multi-hypothesis channel quality indicator feedback

A distributed radio frequency communication system facilitates communication between a wireless terminal and a core network. The system includes a remote radio unit (RRU) coupled to at least one antenna to communicate with the wireless terminal. The RRU includes electronic circuitry to perform at least a first portion of a first-level protocol of a radio access network (RAN) for communicating between the wireless terminal and the core network. The system also includes a baseband unit (BBU) coupled to the core network, and configured to perform at least a second-level protocol of the RAN. A fronthaul link is coupled to the BBU and the RRU. The fronthaul link utilizes an adaptive fronthaul protocol for communication between the BBU and the RRU. The adaptive fronthaul protocol has provisions for adapting to conditions of the fronthaul link and radio network by changing the way data is communicated over the fronthaul link.

Baseband unit with adaptive fronthaul link and dynamic ran parameters

Remote radio unit with adaptive fronthaul link for a distributed radio access network

Improvements to signaling procedures for use in physical random access channel (PRACH)-based proximity detection are disclosed. Signaling and signaling processes from a serving base station may trigger a more efficient and reliable transmission of PRACH from related user equipment (UE). At the dynamic power nodes (DPNs) monitoring for such PRACH-based proximity, features are disclosed which establish neighbor lists for more efficient management of detection and proximity activation.

PRACH-based proximity detection

Baseband unit with adaptive fronthaul link for a distributed radio access network

Techniques for estimating and reporting channel quality indicator (CQI) are disclosed. Neighboring base stations may cause strong interference to one another and may be allocated different resources, e.g., different subframes. A UE may observe different levels of interference on different resources. In an aspect, the UE may determine a CQI for resources allocated to a base station and having reduced or no interference from at least one interfering base station. In another aspect, the UE may determine multiple CQI for resources of different types and associated with different interference levels. For example, the UE may determine a first CQI based on at least one first subframe allocated to the base station and having reduced or no interference from the interfering base station(s). The UE may determine a second CQI based on at least one second subframe allocated to the interfering base station(s).

CQI estimation in a wireless communication network

Baseband unit with adaptive fronthaul link and bypass of MAC function

Remote radio unit with adaptive fronthaul link using adaptive compression

Growing community of inventors

San Diego, CA, United States of America

Alan Barbieri