Description:TECHNICAL FIELD
[0001] The present disclosure relates, in general, to wireless radio networks, and more specifically, relates to a system and method for radio configuration over the air (RCOA) for sensor-based static point-to-multi-point (PTMP) radio networks.

BACKGROUND
[0002] There are different kinds of wireless radio networks like mobile ad-hoc networks (MANET), point-to-point (PTP), and point-to-multi-point (PTMP) radio networks. An example of such wireless radio networks is recited in patent US20180041296, the patent relates to Over-the-air radio broadcast signals that are commonly used to deliver a variety of programming content e.g., audio, and the like to radio receiver systems. Supplemental data e.g., metadata may be provided to radio broadcast receiver systems, where such supplemental data is associated with the programming content delivered via the over-the-air radio broadcast signals.
[0003] Another example is recited in the US Patent No US 8,121,645 B2, the invention relates to a method for configuring a base station of a mobile communication network over a software-defined radio module, that base station serving at least one mobile terminal over an air interface served by that software defined radio module.
[0004] Another example is recited in the US Patent with publication number US 2004/00987.15A1 entitled “over the air mobile device software management”. The invention relates to an architecture for over-the-air management of software on a wireless device that includes a software architecture. Supporting software patch, including secure downloading of software from a data network and robust installation of the same on the wireless device. Using this architecture, a network operator can notify a mobile device user about the software upgrade and send the upgrade to the mobile device over the air.
[0005] Yet another example is recited in the literature that refers to Over-the-air (OTA) testing that is considered as the only feasible solution to evaluate radio performances of the fifth generation (5G) wireless devices which feature two important technologies, i.e., massive multiple-input multiple-output (MIMO) and millimetre-wave (mmWave). The multi-probe anechoic chamber (MPAC) based OTA setup can emulate realistic multipath propagation conditions in a controlled manner.
[0006] However, the existing known arts mentioned above do not provide a solution to configure the radio parameters of the remote radio station from the central radio station to adapt to changing radio channel conditions and overcome hostile environments and configure the radio parameters of the remote radio stations from the central radio station without human intervention at the remote.
[0007] Therefore, it is desired to overcome the drawbacks, shortcomings, and limitations associated with existing solutions, and develop a system and method for radio configuration over the air (RCOA) for the sensor based static PTMP radio network without any human intervention and data/payload loss in clear line of sight conditions.

OBJECTS OF THE PRESENT DISCLOSURE
[0008] An object of the present disclosure relates, in general, to wireless radio networks, and more specifically, relates to the system and method for radio configuration over the air (RCOA) for sensor-based static point-to-multi-point (PTMP) radio networks.
[0009] Another object of the present disclosure is to provide a system that performs RCOA enable and RCOA parameter transactions seamlessly in real-time with latencies of about milli seconds without any data/payload loss in clear line of sight conditions.
[0010] Another object of the present disclosure is to provide a system that provides peer-to-peer link procedures transmitted in TDMA/TDD slots and peer-to-peer link procedures are executed in the data link layer of the wireless protocol stack so that end-to-end latencies are reduced as compared to upper layers of the wireless protocol stack.
[0011] Another object of the present disclosure is to provide a system that provides the central radio station transmits in the down link slot and the corresponding remote radio station in the return uplink slot so that the transaction decisions are taken within milliseconds.
[0012] Another object of the present disclosure is to provide a system that configures the radio parameters of the remote radio station from the central radio station to adapt to changing radio channel conditions and overcome hostile environments.
[0013] Yet another object of the present disclosure is to provide a system that performs network operations without human intervention at remote radio stations.

SUMMARY
[0014] The present disclosure relates, in general, to wireless radio networks, and more specifically, relates to the system and method for radio configuration over the air (RCOA) for sensor-based static point-to-multi-point (PTMP) radio network. The main objective of the present disclosure is to overcome the drawback, limitations, and shortcomings of the existing system and solution, by providing a system and method for RCOA for the sensor-based static PTMP wireless network using TDMA/TDD time duplex channel access.
[0015] The proposed system and method can include a central radio station and a plurality of remote radio stations. Each central radio station and the plurality of remote radio stations have indoor units accommodating wired protocol stack and wireless protocol stack. The processor is coupled to the central radio station and the plurality of remote radio stations. The processor is configured to execute peer-to-peer link procedures for RCOA enable and RCOA parameter transactions between the central radio station and each remote radio station of the plurality of remote radio stations in data link layer of the wireless protocol stack. The processor can initiate, at the central radio station, RCOA enable transaction at the data link layer of the wireless protocol stack by RCOA enable command, wherein the central radio station and corresponding remote radio station begin RCOA parameter transactions after successful RCOA enable transaction. The central radio station can initiate the RCOA parameter transaction at the data link layer of the wireless protocol stack by RCOA parameter command and configure the central radio station and corresponding remote radio station automatically with new RCOA parameter i.e., parameter information which are present in the processor to establish the communication after successful RCOA parameter transaction, wherein the RCOA enable and RCOA parameter transactions are carried out seamlessly in real-time without any payload loss in clear line of sight conditions.
[0016] The peer-to-peer link procedures are transmitted in TDMA/TDD slots, wherein the central radio station transmits in downlink slot and the corresponding remote radio station return in the uplink slot, so that the transaction decisions are taken within milliseconds. The peer-to-peer link procedures are executed in the data link layer of the wireless protocol stack so that end-to-end latencies are reduced as compared to the upper layers of the wireless protocol stack.
[0017] In addition, the central radio station and corresponding remote radio station communicating with the new RCOA parameter, upon encountering unsuccessful transaction of a few super frames in milli seconds configures the central radio station and corresponding remote radio station automatically with previous RCOA parameters, which are memory buffered in the processor, so that the central radio station and corresponding remote radio station establish communication with the previous RCOA parameter. Thus, the system configures the radio parameters of the remote radio station from the central radio station to adapt to changing radio channel conditions and overcome hostile environments and performs network operations without human intervention
[0018] Moreover, the RCOA parameters pertain to remote radio identification, forward error correction (FEC), pre-set channel number, transmit and receive frequencies, remote radio station transmission power output level, and adaptive power control (APC) enable and electronic counter-counter measures (ECCM). The remote radio identification configures the plurality of the remote radio station to the specified remote radio station role, wherein any remote radio station of the plurality of the remote radio station takes the role and responsibility of a particular remote radio station by reconfiguring the remote radio identification. The FEC automatically configures both the central radio station and corresponding remote radio station to various FEC codes, wherein the FEC codes pertain to convolutional, block and hybrid codes as per the RCOA parameter FEC command. The pre-set channel automatically configures both the central radio station and corresponding remote radio station to predefined channel profiles, wherein each channel profile comprises one or more of the parameters pertaining to transmit frequency, receive frequency, range of frequencies for ECCM, FEC and any combination thereof.
[0019] Further, the transmit/receive frequency automatically configures both the central radio station and corresponding remote radio station to the requested transmit/receive frequency to establish communication, wherein the remote radio station transmission power output level automatically configures the transmit power level of the corresponding remote radio station to optimal power levels to obtain good communication range or anti-interception depending on the communication range between radio stations. The APC automatically controls based on the RSSI calibrations of the RF Receivers both at corresponding RRS and CRS the transmission power levels of both the central radio station and corresponding remote radio station to optimize the power levels either to increase the communication range or to avoid interceptions, and the ECCM automatically configures both the central radio station and corresponding remote radio station for ECCM parameter to establish communication for ECM attacks.
[0020] Various objects, features, aspects, and advantages of the inventive subject matter will become more apparent from the following detailed description of preferred embodiments, along with the accompanying drawing figures in which like numerals represent like components.

BRIEF DESCRIPTION OF THE DRAWINGS
[0021] The following drawings form part of the present specification and are included to further illustrate aspects of the present disclosure. The disclosure may be better understood by reference to the drawings in combination with the detailed description of the specific embodiments presented herein.
[0022] FIG. 1 illustrates an exemplary block diagram of PTMP network topology, in accordance with an embodiment of the present disclosure.
[0023] FIG. 2 illustrates an exemplary system configuration of PTMP with radio configuration with two remote radio stations, in accordance with an embodiment of the present disclosure.
[0024] FIG. 3 illustrates an exemplary block diagram of the software stack for the central radio station and one remote radio station, in accordance with an embodiment of the present disclosure.
[0025] FIG. 4 illustrates an exemplary TDMA/TDD slot architecture, in accordance with an embodiment of the present disclosure.
[0026] FIG. 5 and FIG. 6 illustrate exemplary flow charts of the algorithms at the central radio station and remote radio station, in accordance with an embodiment of the present disclosure.
[0027] FIG. 7 illustrates an exemplary time sequence diagram between a central and one remote radio station, in accordance with an embodiment of the present disclosure.
[0028] FIG. 8 illustrates an exemplary flow chart of a method of radio configuration over the air (RCOA) for a sensor based static PTMP wireless network, in accordance with an embodiment of the present disclosure.

DETAILED DESCRIPTION
[0029] The following is a detailed description of embodiments of the disclosure depicted in the accompanying drawings. The embodiments are in such detail as to clearly communicate the disclosure. If the specification states a component or feature “may”, “can”, “could”, or “might” be included or have a characteristic, that particular component or feature is not required to be included or have the characteristic.
[0030] As used in the description herein and throughout the claims that follow, the meaning of “a,” “an,” and “the” includes plural reference unless the context clearly dictates otherwise. Also, as used in the description herein, the meaning of “in” includes “in” and “on” unless the context clearly dictates otherwise.
[0031] The present disclosure relates, in general, to wireless radio networks, and more specifically, relates to system and method for radio configuration over the air (RCOA) for sensor-based static point-to-multi-point (PTMP) radio network.
[0032] The proposed system and method disclosed in the present disclosure overcomes the drawbacks, shortcomings, and limitations associated with the conventional method by providing the system and method for RCOA for the sensor based static PTMP wireless network using Time Division Multiple Access (TDMA)/ Time Division Duplex (TDD) time duplex channel access. In the present method, the central radio station commands each remote radio station over the air link to configure different RCOA parameters as per defined procedures. Sensor-based time critical said radio network applications keep less involvement of human beings at remotes to configure the radio parameters, but the remote radio configurations are initiated from the central radio station as this is the master for the PTMP network. The remote radio stations are slaves and listen and run as per the master. By considering this scenario, to provide a solution for such PTMP radio networks, the present disclosure is proposed. The present method is executed on efficient and high-performing hardware architecture. The elements present in this method to support RCOA enable, and parameters transaction procedures are advanced hardware architecture both at baseband and RF level and wireless protocol stack for different protocols and algorithms. The present disclosure can be described in enabling detail in the following examples, which may represent more than one embodiment of the present disclosure.
[0033] The existing prior arts do not provide a solution to configure the radio parameters of the remote radio stations from the central radio station without human intervention at remote. The PTMP wireless network consists of a central radio station and "N" of remote radio stations. Sensors are integrated at the central radio station for capturing various types of unknown foreign objects data. The present method explains the remote radio configuration method through which sensor information transmission is very much possible using data/payload slots of TDMA/TDD. The RCOA protocol data units (PDUs) are transmitted in control slots of the TDMA/TDD. The present invention formulates a method with a set of wireless RCOA peer-to-peer procedures and parameters as per the RCOA commands from the front panel display unit. The method is executed at the data link layer of the wireless protocol stack for transmission of RCOA enable and RCOA parameters to obtain time-critical and seam-less PTMP wireless network operations with network sustainability and protection. The radio network parameters that are chosen from the central radio station to configure the remote radio stations are remote radio identification, forward error correction (FEC), pre-set channel number, transmit and receive frequencies, remote radio station transmission power output level, and adaptive power control (APC) and electronic counter-countermeasures (ECCM).
[0034] The advantages achieved by the system of the present disclosure can be clear from the embodiments provided herein. The system performs RCOA enable and RCOA parameter transactions seamlessly in real-time with latencies of about milli seconds without any data/payload loss in clear line of sight conditions. The system provides peer-to-peer link procedures that are transmitted in TDMA/TDD slots and peer-to-peer link procedures are executed in the data link layer of the wireless protocol stack so that end-to-end latencies are reduced as compared to upper layers of the wireless protocol stack. The system provides the central radio station that transmits in the down link slot and the corresponding remote radio station in the return uplink slot, so that the transaction decisions are taken within milliseconds. The system configures the radio parameters of the remote radio station from the central radio station to adapt to changing radio channel conditions and overcome hostile environments and performs network operations without human intervention. The description of terms and features related to the present disclosure shall be clear from the embodiments that are illustrated and described; however, the invention is not limited to these embodiments only. Numerous modifications, changes, variations, substitutions, and equivalents of the embodiments are possible within the scope of the present disclosure. Additionally, the invention can include other embodiments that are within the scope of the claims but are not described in detail with respect to the following description.
[0035] FIG. 1 illustrates an exemplary block diagram of PTMP network topology, in accordance with an embodiment of the present disclosure.
[0036] Referring to FIG. 1, system 100 of radio configuration over the air for sensor based static PTMP wireless network topology is disclosed. The PTMP wireless network topology is provided with central radio station (CRS) 102 and a plurality of remote radio stations (RRS) (104-1 to 104-N (which are collectively referred to as remote radio stations 104, hereinafter)) with TDMA/TDD uplink and downlink connections over the broadcast channel. The PTMP wireless network installation as depicted in FIG-1 can include the central radio station 102 and the plurality of remote radio stations 104 to cover the geographical area of network operations.
[0037] The central radio station 102 transmissions are taken place in the TDMA/TDD downlink control slot and remote radio transmissions are taken place in TDMA/TDD uplink control slots. The dotted lines in FIG-1 represent the TDMA/TDD downlink and the solid line represents the TDMA/TDD uplink.
[0038] In an embodiment, each central radio station 102 and the plurality of remote radio stations 104 having indoor units (202, 216-1, 216-2) shown in FIG. 2 accommodating wired protocol stack (304-1, 304-2) and wireless protocol stack (306-1, 306-2) as shown in FIG. 3. The processor (308-1, 308-2) coupled to the central radio station 102 and the plurality of remote radio station 104. The processor is configured to execute peer-to-peer link procedures for RCOA enable and RCOA parameter transaction between the central radio station 102 and each remote radio station of the plurality of remote radio stations 104 in the data link layer of the wireless protocol stack. The processor 308-1 can initiate, at the central radio station, RCOA enable transaction at the data link layer of the wireless protocol stack by RCOA enable command, wherein the central radio station 102 and corresponding remote radio station 104 begin RCOA parameter transactions after successful RCOA enable transaction. The central radio station 102 can initiate the RCOA parameter transaction at the data link layer of the wireless protocol stack by RCOA parameter command and configure the central radio station 102 and corresponding remote radio station 104 automatically with new RCOA parameter to establish the communication after successful RCOA parameter transaction, where the RCOA enable and RCOA parameter transactions are carried out seamlessly in real-time without any payload loss in clear line of sight conditions.
[0039] The peer-to-peer link procedures are transmitted in TDMA/TDD slots, wherein the central radio station 102 transmits in the down link slot and the corresponding remote radio station 104 return in the uplink slot so that the transaction decisions are taken within milliseconds. The central radio station 102 and corresponding remote radio station 104 communicating with the new RCOA parameter, upon encountering unsuccessful transaction of a few super frames in milli seconds, automatically configures the central radio station 102 and corresponding remote radio station 104 with previous RCOA parameters, so that the central radio station 102 and corresponding remote radio stations 104 establish communication with the previous RCOA parameter.
[0040] The RCOA parameters pertain to remote radio identification, forward error correction (FEC), pre-set channel number, transmit and receive frequencies, remote radio station transmission power output level, and adaptive power control (APC) enable and electronic counter-countermeasures (ECCM).
[0041] The RCOA parameter are memory buffered in the processor and after successful acknowledgement, both the CRS 102 and the RRS 104 takes action of configuration when required. For example, the CRS 102 gives the command that is stored in the buffer and then initiate RCOA parameter to corresponding RRS 104. Once the RCOA parameter is sent, it receives successful acknowledgement from the RRS 104, then the CRS 102 may configure the RCOA parameter from the buffer and in parallel the RRS 104 may take the RCOA parameter to takes action of configuration.
[0042] The remote radio identification configures the plurality of the remote radio station to the specified remote radio station role, wherein any remote radio station of the plurality of the remote radio station takes the role and responsibility of a particular remote radio station by reconfiguring the remote radio identification. The FEC automatically configures both the central radio station and corresponding remote radio station to various FEC codes, wherein the FEC codes pertain to convolutional, block and hybrid codes as per the RCOA parameter FEC command. The pre-set channel automatically configures both the central radio station and corresponding remote radio station to predefined channel profiles, wherein each channel profile comprises one or more of the parameters pertaining to transmit frequency, receive frequency, range of frequencies for ECCM, FEC and any combination thereof.
[0043] The transmit/receive frequency automatically configures both the central radio station and corresponding remote radio station to the requested transmit/receive frequency to establish communication.
[0044] The remote radio station transmission power output level automatically configures the transmit power level of the corresponding remote radio station to optimal power levels to obtain good communication range or anti-interception depending on the communication range between radio stations. The APC automatically controls the transmission power levels of both the central radio station and remote radio station to optimize the power levels either to increase the communication range or to avoid interceptions, and the ECCM automatically configures both the central radio station and corresponding remote radio station for ECCM parameter to establish communication for ECM attacks.
[0045] The APC automatically controls based on the received signal strength indicator (RSSI) calibrations of the RF receivers both at RRS 104 and CRS 102. The APC automatically configure with the help of pre-calibrated threshold values for various power levels of high, medium, and low powers. For example, each radio receiver of the CRS 102 and the RRS 104 may be calibrated, when the RRS 104 is receiving power from the CRS 102, the received values of the RRS 104 can be captured and compared with pre-calibrated threshold values which is calibrated initially. Based on the comparison, the radio receiver may calculate the received power accurately. Then the received power is sent to the CRS 102 to determine various power levels of high, medium, and low powers.
[0046] The proposed method can be extended to other radio network parameters based on the application requirements. The present method is designed, developed, and validated for an aerial distance of up to "R" Km between central radio station 102 and each remote radio station 104 for a clear line of sight condition. The present method on RCOA is proved in the real field with an aerial distance up to "R" Km on an indigenous advanced SDR architecture radio system. The focus of the present disclosure is on the software, particularly on the data link layer software of the wireless protocol stack where RCOA transactions are executed. The present disclosure can be utilized in command-and-control applications.
[0047] FIG. 2 illustrates the system configuration of PTMP with radio configuration with two remote radio stations, in accordance with an embodiment of the present disclosure.
[0048] As depicted in FIG.2, PTMP wireless network with its sub-units 200 are shown in FIG.2 with central radio station 102 with stand-by and two remote radio stations (104-1, 104-2). The central radio station 102 can include a normal indoor unit (IDU) 202, stand-by IDU 204, switching control unit 206, outdoor unit 208, beam switching unit 210 (also referred to as beam switch unit 210) and antenna 212.
[0049] The switch control unit 206 is used to select IDU between primary and standby based on health conditions. The central radio station 102 can include the ODU 208 for power amplification of the RF signal and beam switching unit 210 and antenna 212 with interface cables for data and control for transmission in the respective beam of the antenna. The beam switching unit 210 with antenna 212 directs the transmission burst in a particular beam direction as per the control given. The beam switching unit with antenna 212 covers 360° azimuthal angle to cover all available remote radio stations (104-1, 104-2).
[0050] As depicted in FIG. 2, the two remote radio stations (104-1, 104-2) can include an antenna alignment unit (214-1, 214-2), IDU (216-1, 216-2) and outdoor unit (218-1, 218-2). The antenna alignment unit (214-1, 214-2) rotates and directs its antenna towards to get line-of-sight with central radio station 102.
[0051] Further, control cable (CTRL cable) and radio frequency cable (RF cable) to configure the outdoor unit 208 and beam switching unit 210 and the like. The antenna alignment unit (Ant Align IDU) (214-1, 214-2) at remote radio stations (104-1, 104-2) adapted to direct antenna towards CRS 102 to communicate.
[0052] The IDU (202, 216-1, 216-2) is depicted in FIG. 3 can include front panel (302-1, 302-2 (which are collectively referred to as front panel 302, herein)), wired protocol stack (304-1, 304-2 (which are collectively referred to as wired protocol stack 304, herein)), and wireless protocol stack (306-1, 306-2 (which are collectively referred to as wireless protocol stack 306, herein)). The front panel 302 can include a display (DISP) unit and display processing to decode the front panel commands and reshapes the command to send down layers of the IDU (202, 216-1, 216-2). The wired protocol stack 304 is executed on dual-core processor (308-1, 3082 (which are collectively referred to as dual-core processor 308, herein)) with ARM controller and digital signal processor (DSP), where the ARM runs real time operating system (RTOS) and RTOS application to handle IP user data and commands from the front panel display unit in real time to meet the network performance. The RTOS application to handle application-level activities like configuration of RRS or CRS, communicating with RTOS kernel and the likes.
[0053] The display processor (DISP PROC) (308-1, 308-2) handle human machine interface (HMI) related frame analysis encoding/decoding activities and interfaced with Disp. (display unit) through which operators interacts with the radio stations. The laptop/personal computers are connected to the CRS and each RRS through ethernet media cable to run simulators, payload transfer applications/devices. The simulators and payload applications/devices are out scope for the present disclosure even though wants to give glimpses. The simulators are used to capture various built in test equipment (BITE) parameters and its values, simple network mail transfer protocol (SNMP) on network management system (NMS) and etc. The network payloads are files, digital voice, low resolution videos, messages and etc where the PTMP network will not compromise the network throughput and real time performances as per system design.
[0054] The auxiliary processor (AUX PROC) (310-1, 310-2 (which are collectively referred to as auxiliary processing 310, herein)) is run by the DSP for buffering IP packets, sending IP packets and processing and passing of RCOA commands to the wireless protocol stack 306 for over the air transmissions by executing peer-to-peer link procedures. However, the present method of the invention focuses on RCOA commands and corresponding RCOA transactions but not on user IP data. The wireless protocol stack 306 contains software controlling unit (312-1, 312-2 (which are collectively referred to as controlling unit 312, herein)), data link layer (314-1, 314-2 (which are collectively referred to as data link layer 314, herein)) and physical layer (316-1, 316-2 (which are collectively referred to as physical layer 316, herein)).
[0055] The wireless protocol stack 304 is the main heart of system 100 for achieving RCOA. The controlling unit 312 (also referred to as controlling process 312) and data link layer 314 are executed on a dual-core processor with ARM and digital signal processor. The ARM controller runs controlling processing functions such as booting and running the DSP with its data link layer software image. The DSP runs the data link layer software for multiple responsibilities.
[0056] The data link layer 314 is subdivided into the link sub-layer and medium access control (MAC) sub-layer. The link sub-layers functions for protocol data unit (PDU) frame formation as depicted in FIG-8, buffering, cyclic redundancy check (CRC) integrity check, flow control, RCOA etc., whereas the MAC sub-layer runs TDMA scheme to control and provides channel access to radio stations present in the PTMP wireless network.
[0057] The physical layer 316 functions are modulation/demodulation, FEC, TDD, power amplifier (PA) synchronization, digital to analogue conversion, frequency up-conversion of baseband signal in the range of fr1 to fr2, signal amplification and transmission over the air by antenna etc. The operations upto digital to analogue conversion are called baseband processing and the remaining are called RF processing.
[0058] The power amplification of the signal takes place at the ODU 208 which contains power booster hardware. The beam switching unit 210 with antenna 212 directs the transmission burst in a particular beam direction as per the control given. The beam switching unit with antenna covers 360° azimuthal angle to cover all available remote radio stations. The remote radio station (104-1, 104-2) can include the antenna alignment unit (214-1, 214-2) to rotate and direct its antenna towards to get line-of-sight with the central radio station. The IDU stand-by automatically take over the PTMP network operations when primary IDU health goes down. The switching between primary IDU or stand-by IDU is selected by the switching unit.
[0059] FIG. 3 illustrates an exemplary block diagram of software stack 300 for the central radio station and one remote radio station, in accordance with an embodiment of the present disclosure.
[0060] As depicted in FIG. 3, different software processing elements at each stage of wired and wireless protocol stacks is disclosed. The wireless protocol stack (306-1, 306-2) is depicted in FIG-3 with the central and one remote radio station. The inter-wireless protocol stack communication is called using service access points (SAPs) which are functional/interface calls between the data link layer 314 and physical layer 316. The controlling process of FIG-3 handles the functionalities like receiving the command from the wired protocol stack, booting the digital signal processor, buffering, containing RCOA-related auxiliary parameters etc.
[0061] The data link layer 314 is having two sub-layers out of which, one is link sub-layer and another is TDMA sub-layer medium channel control. The link sub-layer handles the formation of PDU frames as per DISP unit commands and response PDU frames received over the air. Buffering of currently ongoing and newly requested RCOA parameters etc is disclosed. TDMA is a multiple-channel access mechanism providing collision-free transmissions in the PTMP network. The data link layer communicates with the physical layer with SAPs.
[0062] Link sub layer processor finally configures physical layer processor to get into new RCOA parameters if everything is perfect or else configures physical layer processor with old RCOA parameters. If RCOA parameters are related to its own layer, then it may self-configure to execute as per the scenario.
[0063] Finally, based on where the RCOA parameters to get configured, the link sublayer processor passes on commands so that corresponding processor may take care of configuration.
[0064] The physical layer (316-1, 316-2) of FIG-3 performs various functionalities like modulation, demodulation, forward error correction (FEC), time division duplex (TDD), power amplifier (PA), sample/bit level correlation for synchronization, tuning and configuration of radio frequency, power amplifier and beam switching antenna and the like. The directional antenna of the remote radio station (104-1, 104-2) is aligned towards central radio station 102 manually with alignment units (214-1, 214-2) respectively. All physical layer activities are implemented in FPGA treated as physical link processor.
[0065] FIG. 4 illustrates an exemplary TDMA/TDD slot architecture 400, in accordance with an embodiment of the present disclosure.
[0066] The TDMA scheme is executed in the medium access sublayer of the data link layer (314-1, 314-2). TDD functionality is executed in the physical layer (316-1, 316-2) to perform downlink and uplink time duplex transmissions. The TDMA/TDD as a combination provides half duplex collision-free, two-way communication between the central and each remote radio station.
[0067] The TDMA/TDD architecture is explained in FIG-4. The TDMA slot duration is “T0” msec which is sub-divided into downlink and uplink with “T0/2” msec slot duration. The FIG-4 is depicted for “N” number of remote radio stations104 tested in the field from central radio station 102. The TDMA/TDD architecture is divided into different frames which are basic TDMA/TDD frame, superframe, and hyper frame. The basic TDMA/TDD frame of duration with “T1” msec consists of “nc” control slots and “nd” number of data/payload slots. The super frame of duration “Ts” msec consists a couple of TDMA/TDD basic frames and “nr” reserved slots. The hyper frame of duration “TH” msec consists of “ns” of super frames.
[0068] In a super frame:
• Tc: CONTROL TDMA/TDD SLOTs duration
• Td: DATA/PAYLOAD TDMA/TDD SLOTs duration
• Tr: RESERVED TDMA/TDD SLOTs duration
[0069] Subscripts corresponding as below
• c: CONTROL TDMA/TDD SLOT
• d: DATA/PAYLOAD TDMA/TDD SLOT
• r: RESERVED TDMA/TDD SLOT
[0070] FIG. 5 and FIG. 6 illustrate exemplary flow chart (500, 600) of the algorithms at the central radio station and remote radio station, in accordance with an embodiment of the present disclosure.
[0071] The flow chart 500 as depicted in FIG. 5 of the central radio station 102 provides activities executed at boot on and during RCOA transactions. The flow chart 600 as depicted in FIG. 6 of each remote station 104 provides activities executed at boot on and during RCOA transactions.
[0072] The proposed method consists of peer-to-peer link procedures and activities to achieve radio configuration over the air (RCOA) between the central radio station 102 and each remote radio station 104. FIG-5 and FIG-6 show the flow chart of algorithms with activities happening in the wireless protocol stack of central and each remote radio station. For each RCOA command, there are various activities get executed in the wireless protocol stack and few activities in the wired protocol stack.
[0073] The focus of the present disclosure is on the wireless protocol stack because the wired protocol stack receives commands, processes, and hands over the processed command to the link sub-layer of the data link layer. Actual, over-the-air transactions are carried out by the data link layer of the wireless protocol stack. FIG-5 & FIG-6 explain in brief radio booting with pre-configured settings, radio normal operating with control and data frames, RCOA enable transaction and finally with RCOA parameter transaction.
[0074] FIG. 7 illustrates an exemplary sequential diagram 700 between a central and one remote radio station, in accordance with an embodiment of the present disclosure.
[0075] Referring to FIG. 7 depicts and explains the transaction of frame PDUs at the data link layer of the wireless protocol stack. The PDUs transmission and receptions are explained over the time axis to understand the sequential transactions with timing. The Ts msec duration is the duration from starting of one super frame to another super frame. T0 msec duration is in which uplink and downlink transmissions happen between central 102 and each remote radio station, 104 respectively.
[0076] The radio operator of central radio station 102 executes the RCOA commands in two phases. In the first phase, the central radio station 102 and corresponding remote radio stations 104 get into the RCOA state after which RCOA parameter transactions are possible. In the second phase, the central and remote radio stations transact RCOA parameters as defined and configure to the RCOA requested parameter automatically as per the RCOA command from the display unit of the central radio station 102.
[0077] FIG-7 shows the brief level of peer-to-peer link procedures using a sequential diagram with a time axis for the two phases. The PDU frames of the data link layer are transmitted over the air as a burst in the TDMA/TDD downlink or uplink frequency up-converted, power amplified and finally transmitted over air as a burst in TDMA/TDD slots in accordance with the central or remote radio station.
[0078] The PDU frame undergoes various elements of the physical layer and gets transmitted. The data link layer PDU frame is inserted into physical layer 316 format which also contains 64-bit orthogonal codes, FEC etc. Then, the physical layer frame is modulated, converted to baseband analogue form, frequency up-converted, power amplified and finally transmitted over air as a burst in TDMA/TDD slots in accordance with the central or remote radio station.
[0079] The RCOA parameters in the present method are remote radio identification, forward error correction (FEC), pre-set channel number, transmit and receive frequencies, remote radio station transmission power output level, and adaptive power control (APC) enable and electronic counter-countermeasures (ECCM).
[0080] The remote radio identification parameter is used to change the remote radio station from one remote radio station to the role of another remote radio station. It implies that for example, the central radio station can change the remote radio station-1 to remote radio station-2 by using this parameter using the RCOA parameter after RCOA enable state. The central radio station and remote radio station can change their FEC from one FEC code to another FEC code.
[0081] For example, from convolution codes to block FEC codes etc. The central radio station and remote radio station can change and configures to a particular pre-set channel number. The transmit and receive frequencies can be configured automatically using RCOA. The central radio station can change the transmit power of the remote radio station over the air to avoid interceptions by the hostiles. The adaptive power control enable is one more RCOA parameter by using this parameter both central and remote radio stations may come to optimum transmission power levels to save the power and inceptions by the hostiles. The ECCM parameters are very critical to the PTMP network. The central radio station commands the remote radio station to go to the ECCM parameters both in frequency hopping and fixed frequency of operation for the system frequency bandwidth of “BW” MHz. The entire system bandwidth is divided into “m” frequency channels so that the system can have approximately f1 to fm frequency channels for protection.
[0082] There is various combination of frequency sets to protect the PTMP network using ECCM parameters. Each parameter transaction completes in milliseconds of time and achieves real-time RCOA. All parameters’ transactions are achieved successfully without any data/payload loss seamlessly. Data/payload transmissions happen in TDMA/TDD data slots. All the RCOA enable and RCOA parameter transmissions happen in TDMA/TDD control slots. Here, it is emphasized that the data/payload data slots are in between control slots and without any data/payload loss, successfully RCOA is implemented in control slots. When there is RCOA enabled or RCOA parameter transaction fails over the air, then the central and remote radio stations automatically go back and configure with previous parameter settings for communication. Even with previous radio parameter settings, if the link is not able to establish, troubleshooting of the radio station is required for failures.
[0083] Thus, the present invention overcomes the drawbacks, shortcomings, and limitations associated with existing solutions, and performs RCOA enable and RCOA parameter transactions seamlessly in real-time with latencies of about milli seconds without any data/payload loss in clear line of sight conditions. The system provides peer-to-peer link procedures that are transmitted in TDMA/TDD slots and peer-to-peer link procedures are executed in the data link layer of the wireless protocol stack so that end-to-end latencies are reduced as compared to upper layers of the wireless protocol stack. The system provides the central radio station transmits in the downlink slot and corresponding remote radio station in the return uplink slot, so that the transaction decisions are taken within milliseconds. The system configures the radio parameters of the remote radio station from the central radio station to adapt to changing radio channel conditions and overcome hostile environments and performs network operations without human intervention.
[0084] FIG. 8 illustrates an exemplary flow chart of a method of radio configuration over the air (RCOA) for sensor based static PTMP wireless network, in accordance with an embodiment of the present disclosure.
[0085] Referring to FIG. 8, method 800 includes at block 802 the processor can execute peer-to-peer link procedures for RCOA enable and RCOA parameters between the central radio station and each remote radio station of the plurality of remote radio station in the data link layer of the wireless protocol stack, the processor coupled to the central radio station and the plurality of remote radio station, wherein each central radio station and the plurality of remote radio station having an indoor unit (202, 216-1, 216-2) accommodating wired protocol stack (304-1, 304-2) and wireless protocol stack (306-1, 306-2).
[0086] At block 804, the central radio station can initiate RCOA enable transaction at the data link layer of the wireless protocol stack by RCOA enable command, wherein the central radio station and corresponding remote radio station begin RCOA parameter transactions after successful RCOA enable transaction.
[0087] At block 806, the central radio station can initiate the RCOA parameter transaction at the data link layer of the wireless protocol stack by RCOA parameter command and at block 808, the central radio station and corresponding remote radio station configure automatically with new RCOA parameter to establish the communication after successful RCOA parameter transaction, wherein the RCOA enable and RCOA parameter transactions are carried out seamlessly in real-time without any payload loss in clear line of sight conditions.
[0088] The peer-to-peer link procedures of radio configuration parameters are carried out with data link layer control PDU frames using control slots of TDMA/TDD. Amid RCOA procedures because of multiple super frame transactions, seamless communication of user data is achieved between central and remote radio stations with no loss of user data. The real-time response for RCOA parameter configurations is met within milliseconds of duration because of the execution of link procedures in the data link layer instead of upper layers. Automatically the central and remote radio stations go back to previous parameters configuration settings instead of new RCOA configurations requested in case of channel/network issues to get reliable communications. The RCOA parameter transactions are ensured with the corresponding remote radio station by the central radio station with RCOA enable commands.
[0089] It will be apparent to those skilled in the art that the system 100 of the disclosure may be provided using some or all of the mentioned features and components without departing from the scope of the present disclosure. While various embodiments of the present disclosure have been illustrated and described herein, it will be clear that the disclosure is not limited to these embodiments only. Numerous modifications, changes, variations, substitutions, and equivalents will be apparent to those skilled in the art, without departing from the spirit and scope of the disclosure, as described in the claims.

ADVANTAGES OF THE PRESENT INVENTION
[0090] The present invention provides a system that performs RCOA enable and RCOA parameter transactions seamlessly in real-time with latencies of about milli seconds without any data/payload loss in clear line of sight conditions.
[0091] The present invention provides a system that provides peer-to-peer link procedures transmitted in TDMA/TDD slots and peer-to-peer link procedures are executed in the data link layer of the wireless protocol stack so that end-to-end latencies are reduced as compared to upper layers of the wireless protocol stack.
[0092] The present invention provides a system that provides the central radio station transmits in the down link slot and the corresponding remote radio station in the return uplink slot so that the transaction decisions are taken within milliseconds.
[0093] The present invention provides a system that configures the radio parameters of the remote radio station from the central radio station to adapt to changing radio channel conditions and overcome hostile environments.
[0094] The present invention provides a system that performs network operations without human intervention at the RRS.
, Claims:1. A method (800) of radio configuration over the air (RCOA) for sensor based static PTMP wireless network, the method comprising:
executing (802), at a processor, peer-to-peer link procedures for RCOA enable and RCOA parameter transactions between a central radio station and each remote radio station of the plurality of remote radio stations in data link layer of the wireless protocol stack, the processor coupled to the central radio station and the plurality of remote radio station, wherein each central radio station and the plurality of remote radio stations having an indoor unit (202, 216-1, 216-2) accommodating wired protocol stack (304-1, 304-2) and wireless protocol stack (306-1, 306-2);
initiating (804), at the central radio station, RCOA enable transaction at the data link layer of the wireless protocol stack by RCOA enable command, wherein the central radio station and corresponding remote radio stations begin RCOA parameter transactions after successful RCOA enable transaction;
initiating (806), at the central radio station, the RCOA parameter transaction at the data link layer of the wireless protocol stack by RCOA parameter command; and
configuring (808) the central radio station and corresponding remote radio stations automatically with new RCOA parameter to establish the communication after successful RCOA parameter transaction, wherein the RCOA enable and RCOA parameter transactions are carried out seamlessly in real-time without any payload loss in clear line of sight conditions.
2. The method as claimed in claim 1, wherein the peer-to-peer link procedures are transmitted in time division multiple access (TDMA)/ time-division duplexing (TDD) slots, wherein the central radio station (102) transmits in downlink slot and the corresponding remote radio stations (104) return in the uplink slot, so that the transaction decisions are taken within milliseconds.
3. The method as claimed in claim 1, wherein the central radio station (102) and corresponding remote radio stations (104) communicating with the new RCOA parameter, upon encountering unsuccessful transaction of a predefine number of super frames in milli seconds, automatically configures the central radio station (102) and corresponding remote radio stations (104) with previous RCOA parameters, so that the central radio station (102) and corresponding remote radio stations (104) establish communication with the previous RCOA parameter.
4. The method as claimed in claim 1, wherein the RCOA parameters pertain to remote radio identification, forward error correction (FEC), pre-set channel number, transmit and receive frequencies, remote radio station transmission power output level, and adaptive power control (APC) enable and electronic counter-countermeasures (ECCM).
5. The method as claimed in claim 4, wherein the remote radio identification configures the plurality of the remote radio stations (104) to the specified remote radio station role, wherein any remote radio station of the plurality of the remote radio stations (104) takes the role and responsibility of a particular remote radio station by reconfiguring the remote radio identification.
6. The method as claimed in claim 4, wherein the FEC automatically configures both the central radio station (102) and corresponding remote radio stations (104) to various FEC codes, wherein the FEC codes pertain to convolutional, block and hybrid codes as per RCOA parameter FEC command.
7. The method as claimed in claim 4, wherein the pre-set channel automatically configures both central radio station (102) and corresponding remote radio stations (104) to predefined channel profiles, wherein each channel profile comprises one or more of the parameters pertaining to transmit frequency, receive frequency, range of frequencies for ECCM, FEC and any combination thereof.
8. The method as claimed in claim 4, wherein the transmit/receive frequency automatically configures both the central radio station (102) and corresponding remote radio stations (104) to requested transmit/receive frequency to establish communication, wherein the remote radio station transmission power output level automatically configures the transmit power level of corresponding remote radio stations (104) to optimal power levels to obtain good communication range or anti-interception depending on the communication range between the radio stations (102, 104).
9. The method as claimed in claim 4, wherein the APC automatically with the help of pre-calibrated threshold values for various power levels of high, medium and low powers controls the transmission power levels of both the central radio station (102) and corresponding remote radio stations (104) to optimize the power levels either to increase the communication range or to avoid interceptions and wherein the ECCM automatically configures both the central radio station (102) and corresponding remote radio stations (104) for ECCM parameter to establish communication for ECM attacks.
10. A system (100) of radio configuration over the air (RCOA) for sensor based static PTMP wireless network, the system comprising:
a central radio station (102) and a plurality of remote radio stations (104), each central radio station (102) and the plurality of remote radio stations (104) having an indoor unit (202, 216-1, 216-2) accommodating a wired protocol stack (304-1, 304-2) and wireless protocol stack (306-1, 306-2); and
a processor (308) operatively coupled to the central radio station (102) and the plurality of remote radio stations (104), the processor configured to:
execute peer-to-peer link procedures for RCOA enable and RCOA parameter transactions between the central radio station and each remote radio station of the plurality of remote radio stations in data link layer of the wireless protocol stack;
initiate, at the central radio station (102), RCOA enable transaction at the data link layer of the wireless protocol stack by RCOA enable command, wherein the central radio station and corresponding remote radio stations begin RCOA parameter transactions after successful RCOA enable transaction;
initiate, at the central radio station (102), the RCOA parameter transaction at the data link layer of the wireless protocol stack by RCOA parameter command; and
configure the central radio station and corresponding remote radio stations automatically with a new RCOA parameter to establish the communication after successful RCOA parameter transaction, wherein the RCOA enable and RCOA parameter transactions are carried out seamlessly in real-time without any payload loss in clear line of sight conditions.