261 results about "Fronthaul" patented technology

A wireless communications system is disclosed. The system comprises a baseband processing unit (BBU) pool including one or more baseband processing units (BBUs), and a plurality of remote radio heads (RRHs) connected to the BBU pool through a front-haul network, wherein the wireless communications system has a plurality of sectors, each of which includes one or more small cells, each of which is deployed by one of the plurality of RRHs, wherein a BBUs is mapped to two or more RRHs in a sector in a one-to-many configuration, and a BBU is mapped to a single RRH in a sector in a one-to-one configuration, and wherein a combination of the one-to-one configuration and the one-to-many configuration is applied to each sector. Other systems, apparatuses, and methods also are disclosed.

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.

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.

There are provided systems, methods, and interfaces for optimization of the fronthaul interface bandwidth for Radio Access Networks and Cloud 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 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.

The invention discloses a wireless communication networking method. The method includes the steps of distributing HPNs in an area providing service, arranging at least two fog remote radio heads (F-RRHs), conducting communication through a mode of directly having access to the HPNs when the movement speed of a user terminal is larger than a preset threshold value M1 or real-time voice service communication needs to be conducted, conducting communication through a local F-RRH mode when the movement speed of the user terminal is smaller than or equal to the preset threshold value M1 and the distance between the user terminal and a user terminal to be in communication with the user terminal is larger than a preset threshold value D1 and is smaller than or equal to a preset threshold value D2, and conducting communication through a global BBU pool mode when the movement speed of the user terminal is smaller than or equal to the preset threshold value M1 and the distance between the user terminal and the user terminal to be in communication with the user terminal exceeds the preset threshold value D2. By means of the method, the requirement for the capacity of fronthauls can be lowered, the signal processing pressure on a BBU pool in a cloud computing service can be lowered, and the transmission delay can be prolonged.

Methods and systems for facilitating communication between a core network and a wireless terminal in an upper first-level protocol unit (UL1) of a radio access network (RAN) as disclosed. An upper first level protocol unit (UL1) 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 (LL1). The LL1 is in a second apparatus separate from the first apparatus. A communication quality parameter for communication between the first apparatus and the LL1 is determined, and a message related to the communication quality parameter is sent by the UL1 to an entity of the RAN other than the LL1.

A digital mobile fronthaul (MFH) network includes a baseband processing unit (BBU) having a digitization interface configured to digitize, using delta-sigma digitization, at least one wireless service for at least one radio access technology. The network further includes a transport medium in operable communication with the BBU. The transport medium is configured to transmit a delta-sigma digitized wireless service from the BBU. The network further includes a remote radio head (RRH) configured to operably receive the delta-sigma digitized wireless service from the BBU over the transport medium.

Various communication systems may benefit from improved bandwidth compression techniques. For example, certain communication systems may benefit from a radio fronthaul traffic compression on a frequency domain data. A method can include identifying a composite waveform corresponding to a real component and an imaginary component of a frequency domain data at a first device. The method may also include causing a transmission of a value that represents the composite waveform to a second device from the first device.

Systems and methods for communicating in an Ethernet cloud radio access network are disclosed. In some implementations, a baseband unit determines a time when a plurality of remote radio heads, accessible to a user equipment, are scheduled to transmit a signal to the user equipment. The baseband unit transmits, via an Ethernet connection and in advance of the determined time, the signal and information about the determined time to each of the plurality of remote radio heads, to enable the plurality of remote radio heads to simultaneously transmit, at the determined time and via a radio connection, a Fourier transform of the signal to the user equipment.

The invention provides a forward transmission network data processing device and method, the device comprises a processor, at least one high-speed forward transmission interface and at least one low-speed forward transmission interface. The processor comprises a protocol frame processing module used for converging data uploaded by a plurality of low-speed forward transmission interfaces into a group of data as first target data; selecting one of the high-speed forward interfaces as a first target interface, and sending the first target data to forward network transmission equipment through thefirst target interface; and selecting one of the high-speed forward interfaces as a second target interface, receiving the data issued by the forward network transmission equipment through the secondtarget interface as second target data, and finally distributing the second target data to the corresponding low-speed forward interface. According to the method and the device, the interconnection problem of low-speed forward transmission interfaces and forward transmission network transmission equipment of various wireless devices can be effectively solved.

A method includes providing run-time optical 5G mobile fronthaul MFH topology re-configurability through software-defined control of both optical circuit switches and electrical packet switches readily accommodating unpredictable traffic patterns and low latency optical by-pass based device-to-device connectivity. The providing includes employing an optical any-to-any switch for wavelength-tunable and fixed-wavelength optical transceivers.

The invention relates to a data transmission method, a host unit, an expansion unit, a base station system and a readable storage medium. The method is applied to the base station system, the base station system comprises a host unit, a plurality of expansion units and a plurality of remote unit, the host unit is in communication connection with the plurality of expansion units, and each expansion unit in the plurality of expansion units is in communication connection with at least one far-end unit. The method comprises the steps of using the host unit to determine a target expansion unit corresponding to user equipment from a plurality of expansion units according to uplink signals received from the plurality of expansion units respectively, wherein the uplink signal sent by each extension unit is used for indicating the signal quality condition between the far-end unit connected with the extension unit and the user equipment; sending the indication information to the target expansion unit, wherein the indication information is used for indicating the target expansion unit to send uplink data of the user equipment received from the remote unit to the host unit; and receiving the uplink data sent by the target expansion unit. By adopting the method, the requirement for the front transmission bandwidth can be reduced.

The present invention provides a passive wavelength-division mobile forward network system. The system is characterized by comprising a local end, a distal end, and a trunk optical fiber. The system further comprises a first conveying unit used for conveying the detection light to the trunk optical fiber at one end of the trunk optical fiber; a second conveying unit used for conveying the detection light to each branch of the distal end through the trunk optical fiber at the other end of the trunk optical fiber; a reflector disposed at the tail end of each branch of the distal end and used for reflecting the detection light. The detection light is synthesized to the trunk optical fiber through the first conveying unit and then the detection light is conveyed to each branch of the distal end through the trunk optical fiber by the second conveying unit. Finally, the detection light is returned along an original path by the reflector. In this way, whether the trunk optical fiber and each branch of the distal end are faulty or not are detected by the detection light. The system has little modification on the network and fewer elements are added. Therefore, the advantages of simple operation and low cost are realized.

A cloud radio access network (CRAN) system includes a baseband unit (BBU) and a radio unit (RU) remote from the BBU. The fronthaul interface between the RU and the BBU includes a radio frequency interface (RF) functionality implemented in the RU, and implementation of asymmetrical physical layer (PHY) functionality split between the BBU and RU. The asymmetrical physical layer (PHY) functionality split includes: downlink (DL) antenna port mapping and DL precoding implemented in the RU; and the split of the PHY functionality for uplink (UL) at the antenna port mapping in the BBU. For the DL, precoding and resource element (RE) mapping to frequency resources is implemented in BBU, and RE mapping for antenna ports is implemented in the RU|[WA1]. The split also provides support for license-assisted access (LAA) in the CRAN system.

Provided are a method and a device for configuring a central unit and a distributed unit for a 5th generation (5G) wireless access network base station configuration. In particular, the method of a central unit (CU) for communicating with a terminal may include receiving network function configuration information of a distributed unit (DU) connected to the CU by using a fronthaul interface, configuring a network function of the CU on the basis of the network function configuration information of the DU, and transmitting data to a terminal through the DU.

The invention discloses a mobile forward transmission device and method based on Walsh code channel aggregation, and relates to the field of optical and wireless fusion access networks. The mobile forward transmission device comprises a transmitting terminal, an optical fiber link and a receiving terminal, the transmitting terminal comprises a centralized BBU pool, a DAC and an electro-optic conversion module, the centralized BBU pool comprises a BBU, a channel aggregation model and a training sequence adding module, the receiving terminal comprises a photovoltaic conversion module, an analog-to-digital converter ADC, a frame synchronization module, a channel estimation module, a channel de-aggregation module, a plurality of remote radio frequency heads RRH and an antenna. The mobile forward transmission device disclosed by the invention can greatly reduce the computational complexity and improve the spectral efficiency.

The invention provides a wireless forward transmission system of digital optical transmission based on a multi-core optical fiber. The system comprises: a BBU pool, a feeder type optical fiber, a coupler unit of a second multi-core optical fiber, distributed optical fibers and L radio remote units, namely L RRU units, wherein the BBU pool is connected to the coupler unit of the second multi-core optical fiber through the feeder type optical fiber, an output end of the coupler unit of the second multi-core optical fiber is connected to the L RRU units through the distributed optical fibers, and the value of L mainly depends on the number of wireless user data accessed by the system. The wireless forward transmission system adopts the space division multiplexing technology based on the multi-core optical fiber to improve the system capacity on the space dimension, on one hand, the space division multiplexing is added on the existing wavelength-division multiplexing technology; and on the other hand, analog sub-band interference problem caused by the multiplexing of multiple subcarriers during massive data transmission can be well overcome, and the online wavelength resources are effectively scheduled by a wavelength router to reduce the power consumption of the system to a certain extent.

The embodiment of the invention provides a processing method of a data transmission channel and devices. The processing method comprises the steps that a target base station receives a switching request message sent by a source base station, wherein the switching request message comprises a PDU flow based data forward-transmission instruction or a RB based data forward-transmission instruction; the target base station distributes data forward-transmission tunnel address information to a corresponding PDU flow based on the PDU flow based data forward-transmission instruction and the QoS reception data of the target base station or distributes the data forward-transmission tunnel address information to a corresponding RB based on the RB based data forward-transmission instruction and the QoSreception data of the target base station; and the target base station sends a switching request response message to the source base station, wherein the switching request response message includes the data forward-transmission tunnel address information.

The invention provides a secondary eNB (SeNB) changing method and device. The SeNB changing method comprises the following steps: informing a target SeNB, a source SeNB and user equipment (UE) that the UE keeps a connection with the source SeNB in an SeNB changing process; receiving an indication message from the target SeNB, wherein the indication message is used for indicating that the UE accesses the target SeNB successfully; and instructing the source SeNB to release the connection with the UE according to the indication message. Through adoption of the method and the device, the problem that data forwarding and releasing of the SeNB cannot be triggered effectively since change of the SeNB under DC (Dual Connectivity) is not supported in the prior art is solved, and the effects of keeping data communication and shortening data interrupt time in an SeNB changing process of the UE are achieved.