Abstract: A method is provided for extraction of fine silk fibroin powder from Bombyx mori silk cocoons. The conventional method of silk processing includes dissolution of the degummed silk fibers in some strong salt solutions followed by a dialysis step. The earlier reported strong salt solutions have either associated environment issues or lower dissolution ability for silk. However, the provided method includes degumming silk cocoons, drying and cutting the degummed silk fibers, mixing the fibers with an ionic liquid, stirring the mixture, regeneration of silk from the mixture with the help of an anti-solvent followed by centrifugation, drying the precipitated silk and finally obtaining a fine powder of silk.

Abstract: A method of making a metallic material includes mechanically alloying base metal with corrosion inhibitor to thereby form an alloy having the base metal and the corrosion inhibitor. A method of preventing corrosion includes providing the alloy to a process environment, allowing the process environment to corrode or crack the alloy to thereby expose the corrosion inhibitor of the alloy to the process environment, allowing a first ionic component of the corrosion inhibitor to be transformed to a second ionic component, and allowing the second ionic component to be repassivated with the alloy to thereby prevent further corrosion or cracking of the alloy.

Abstract: A method for wireless communication includes assigning a first channel and a first bandwidth to a plurality of first links formed by user equipment (UEs) communicating with access points (APs) in the mesh network. The method further includes assigning a second bandwidth to a plurality of second links formed by the APs communicating with one another, wherein the second links are assigned different channels. The method also includes acquiring link data from the UEs and determining if mesh rate requirements are met with the assigned first bandwidth and the first channel. The method also includes determining a minimum bandwidth required for the first links and assigning the minimum bandwidth if mesh rate requirements are met. The method also includes assigning a second channel to the first links if mesh rate requirements are not met.

Abstract: A method for determining a route from a mesh network to an external network includes identifying route segments from a user equipment (UE) to the external network. The route segments comprise at least a first route segment from the UE to a first mesh access point (AP), a second route segment from the first mesh AP to the external network through a wide area cellular wireless network (WACWN), and a third route segment from the first mesh AP to the external network through an alternative network. The method further includes determining respective bandwidth of at least the first, second and third route segments and selecting the route based on the bandwidth of the first, second and third route segments, wherein the route comprises at least two of the route segments. The method also includes routing data between the UE and the external network via the selected route.

Abstract: A method is provided for extraction of fine silk fibroin powder from Bombyx mori silk cocoons. The conventional method of silk processing includes dissolution of the degummed silk fibers in some strong salt solutions followed by a dialysis step. The earlier reported strong salt solutions have either associated environment issues or lower dissolution ability for silk. However, the provided method includes degumming silk cocoons, drying and cutting the degummed silk fibers, mixing the fibers with an ionic liquid, stirring the mixture, regeneration of silk from the mixture with the help of an anti-solvent followed by centrifugation, drying the precipitated silk and finally obtaining a fine powder of silk.

Abstract: A wireless transmitter includes a signal processing circuit configured to generate a plurality of first and second spatial streams signals. The transmitter includes a frequency shift circuit configured to selectively apply different frequency shifts to the first and second spatial streams signals. A wireless receiver includes a frequency shift circuit configured to selectively apply different frequency shifts to the received first and second spatial streams signals. The receiver also includes a signal processing circuit configured to process the first and second frequency shifted signals.

Abstract: A method of wireless communication includes receiving a plurality of parameter values at a user equipment (UE) using a first local oscillator (LO) frequency value, where the plurality of parameter values includes indications of a downlink frequency channel and an uplink frequency channel. The method further includes determining a second LO frequency value at the UE, where the second LO frequency value is determined using the indications of downlink and uplink frequency channels. The method further includes receiving downlink signals from an associated base station using the second LO frequency value.

Abstract: A method for wireless communication includes transmitting at least first and second uplink signals by a UE to first and second virtualized radio units, respectively. The first and second uplink signals are processed by one or more virtual machines shared by both the first and second radio units. The UE switches connection from the first virtualized radio unit to the second virtualized radio unit without a transfer of context information from the first virtualized radio unit to the second virtualized radio unit. A first virtual machine implements at least one of a lower physical layer (PHY-Low), an analog-to-digital converter (ADC), a digital-to-analog converter (DAC), and a radio frequency (RF) transceiver. A second virtual machine implements at least one of a Radio Link Control (RLC) layer, a Medium Access Control (MAC) layer, and a higher physical (PHY-high) layer.

Abstract: Selective crest factor reduction and digital pre-distortion of physical channels and physical signals in a wireless communication network are disclosed. A method for wireless communication includes allocating transmission bandwidths for physical channels and physical signals and determining if the total allocated transmission bandwidth for the physical channels and the physical signals is less than or equal to a first bandwidth threshold value. If the total allocated transmission bandwidth is less than or equal to the first bandwidth threshold value, the method includes digitally pre-distorting the physical channels and the physical signals and transmitting the digitally pre-distorted physical channels and physical signals. The method also includes applying digital crest factor reduction to the physical channels and the physical signals if the total allocated transmission bandwidth is less than or equal to a second bandwidth threshold value.

Abstract: Methods and apparatus for feeding back channel quality indication in a communication system. First, a first channel quality indication index is determined in dependence upon a channel quality estimation of a first transmission channel, and a second channel quality indication index is determined in dependence upon a channel quality estimation of a second transmission channel. A differential channel quality indication index of the second channel quality indication index is determined with reference to the first channel quality indication index in dependence upon a differential compression scheme. Then, the first channel quality indication index and the differential channel quality indication index are reported.

Abstract: A method of wireless communication includes receiving a plurality of parameter values at a user equipment (UE) using a first local oscillator (LO) frequency value, where the plurality of parameter values includes indications of a downlink frequency channel and an uplink frequency channel. The method further includes determining a second LO frequency value at the UE, where the second LO frequency value is determined using the indications of downlink and uplink frequency channels. The method further includes receiving downlink signals from an associated base station using the second LO frequency value.

Abstract: Methods and systems for channel mapping in a densely deployed network are disclosed. The system includes a node comprising a plurality of base stations configured to communicate with client devices in a wireless communication network, wherein transmission from the base stations to the client devices is conducted on a downlink (DL) frequency band and transmission from the client devices to the base stations is conducted on an uplink (UL) frequency band. The DL frequency band is different from the UL frequency band. DL and UL frequency pairs for the base stations are assigned according to a channel mapping scheme that determines DL and UL frequency pairs based on a plurality of channel parameters. The channel parameters include, for example, received signal strength indicator (RSSI), signal to noise (S/N) ratio, channel capacity, and bit error rate (BER).

Abstract: A transceiver includes a first TDD switch operable to connect a first RF front-end transmit module to a first antenna array during a first TDD downlink time period when the transceiver is transmitting at a first frequency band and operable to connect a first RF front-end receive module to the first antenna array during a first TDD uplink time period when the transceiver is receiving at the first frequency band. The transceiver also includes a second TDD switch operable to connect a second RF front-end transmit module to a second antenna array during a second TDD downlink time period when the transceiver is transmitting at a second frequency band and operable to connect a second RF front-end receive module to the second antenna array during a second TDD uplink time period when the transceiver is receiving at the second frequency band.

Abstract: A method for wireless communication by using dual frequency asymmetric time division duplex (TDD) includes transmitting first downlink data by a radio base station during a first time division duplex (TDD) downlink time period on a first frequency band and receiving first uplink data by the radio base station during a first time division duplex (TDD) uplink time period on the first frequency band, wherein the first TDD downlink time period is greater than the first TDD uplink time period. The method further includes transmitting second downlink data by the radio base station during a second TDD downlink time period on a second frequency band and receiving second uplink data by the radio base station during a second TDD uplink time period on the second frequency band, wherein the second TDD downlink time period is smaller than the second TDD uplink time period.

Abstract: Selective crest factor reduction and digital pre-distortion of physical channels and physical signals in a wireless communication network are disclosed. A method for wireless communication includes allocating transmission bandwidths for physical channels and physical signals and determining if the total allocated transmission bandwidth for the physical channels and the physical signals is less than or equal to a first bandwidth threshold value. If the total allocated transmission bandwidth is less than or equal to the first bandwidth threshold value, the method includes digitally pre-distorting the physical channels and the physical signals and transmitting the digitally pre-distorted physical channels and physical signals. The method also includes applying digital crest factor reduction to the physical channels and the physical signals if the total allocated transmission bandwidth is less than or equal to a second bandwidth threshold value.

Abstract: Methods and systems for channel mapping in a densely deployed network are disclosed. The system includes a node comprising a plurality of base stations configured to communicate with client devices in a wireless communication network, wherein transmission from the base stations to the client devices is conducted on a downlink (DL) frequency band and transmission from the client devices to the base stations is conducted on an uplink (UL) frequency band. The DL frequency band is different from the UL frequency band. DL and UL frequency pairs for the base stations are assigned according to a channel mapping scheme that determines DL and UL frequency pairs based on a plurality of channel parameters. The channel parameters include, for example, received signal strength indicator (RSSI), signal to noise (S/N) ratio, channel capacity, and bit error rate (BER).

Abstract: A method for wireless communication includes multiplexing transmit data into at least a first component carrier data and a second component carrier data. The method further includes digitally pre-coding at least the first and second component carrier data for digital beamforming. The method also includes converting, by digital to analog conversion, the digitally pre-coded first and second component carrier data to first and second analog signals. The method also includes processing the second analog signals to generate analog beamformed millimeter wave band signals and transmitting the millimeter wave band signals. The method also includes processing the first analog signals to generate sub-7 GHz band signals and transmitting the sub-7 GHz band signals, wherein the sub-7 GHz band signals are transmitted with digital beamforming and without analog beamforming, and wherein the millimeter wave band signals are transmitted with both digital and analog beamforming.

Abstract: Methods and systems for channel mapping in a densely deployed network are disclosed. The system includes a node comprising a plurality of base stations configured to communicate with client devices in a wireless communication network, wherein transmission from the base stations to the client devices is conducted on a downlink (DL) frequency band and transmission from the client devices to the base stations is conducted on an uplink (UL) frequency band. The DL frequency band is different from the UL frequency band. DL and UL frequency pairs for the base stations are assigned according to a channel mapping scheme that determines DL and UL frequency pairs based on a plurality of channel parameters. The channel parameters include, for example, received signal strength indicator (RSSI), signal to noise (S/N) ratio, channel capacity, and bit error rate (BER).

Abstract: A method for wireless communication includes multiplexing transmit data into at least a first component carrier data and a second component carrier data. The method further includes digitally pre-coding at least the first and second component carrier data for digital beamforming. The method also includes converting, by digital to analog conversion, the digitally pre-coded first and second component carrier data to first and second analog signals. The method also includes processing the second analog signals to generate analog beamformed millimeter wave band signals and transmitting the millimeter wave band signals. The method also includes processing the first analog signals to generate sub-7 GHz band signals and transmitting the sub-7 GHz band signals, wherein the sub-7 GHz band signals are transmitted with digital beamforming and without analog beamforming, and wherein the millimeter wave band signals are transmitted with both digital and analog beamforming.

Abstract: Systems and methods for wireless communications with control and user plane separation includes radio units. The radio units include a central unit (CU) which includes a central unit user plane (CU-UP) located in at least one of the radio units. The central unit user plane (CU-UP) includes a first Packet Data Convergence Protocol (PDCP) layer and a Service Data Adaptation Protocol (SDAP) layer connected to the first Packet Data Convergence Protocol (PDCP) layer. The central unit (CU) also includes a central unit control plane (CU-CP) located remotely from the central unit user plane (CU-UP). The central unit control plane (CU-CP) includes a second Packet Data Convergence Protocol (PDCP) layer and a Radio Resource Control (RRC) layer connected to the second Packet Data Convergence Protocol (PDCP) layer. The central unit user plane (CU-UP) and the central unit control plane (CU-CP) are virtualized and shared by the radio units.