Abstract: A base station radio having a number of multi-carrier power amplifiers to provide signal diversity at a cell site is disclosed. The base station radio is operable to provide an on-demand sleep mode condition when certain conditions are met. The base station radio has a first multi-carrier power amplifier for providing a main RF beam transmission at one sector of the cell site and a second multi-carrier power amplifier for providing RF beam transmission diversity to the main RF beam transmission. A switch is operable to disable either the first or second multi-carrier power amplifier when a sleep mode condition is required at one or more sectors of the cell site.

Abstract: There is provided a method of controlling a CPRI monitor port of a remote radio equipment following a powering cycle. Access to the CPRI monitor port is first detected. An absence timer decrementing process is started when the CPRI monitor port becomes inactive. The timer value is then stored in a region of persistent memory and the memory is updated as the absence timer is decremented. If a power cycle at the remote radio equipment is detected and the remote radio equipment powered on, the absence timer value is read from the persistent memory and the absence timer is re-started if the timer value is greater than zero.

Abstract: The present disclosure relates to delay compensation during synchronization of uplink and downlink frames in a base station in a cellular communication network. In general, the base station includes a radio equipment and a radio equipment controller that together form at least part of the base station. In one embodiment, the radio equipment includes a first interface configured to receive data from the radio equipment controller and a second interface configured to send data to the radio equipment controller. During synchronization, the radio equipment receives, at the first interface of the radio equipment, a synchronization message from the radio equipment controller. The radio equipment then passes the synchronization message from the first interface of the radio equipment to the second interface of the radio equipment with a synthetic delay that is in addition to an in-equipment delay from the first interface to the second interface.

Abstract: Embodiments of a Radio Equipment (RE), and methods of operation thereof, are disclosed. In one embodiment, the RE is designed for Inter-Process Communication (IPC) and is connected to a Radio Equipment Controller (REC) that does not support IPC. In operation, the RE receives a non-IPC message from the REC. An IPC translator of the RE then translates the non-IPC message into an equivalent IPC message and provides the equivalent IPC message to a corresponding process operating on the RE. In one embodiment, multiple processes are operating on the RE, and the IPC translator provides the equivalent IPC message to one of the processes that is responsible for handling the equivalent IPC message. As a result of the IPC translator, IPC signaling occurring at the RE is transparent to the REC.

Abstract: A method and apparatus for protecting a photodiode of an optical receiver from overload optical signals by monitoring an operating parameter of the photodiode, determining if the operating parameter indicates that the photodiode is in a potential overload state in which the photodiode is susceptible to an overload optical signal; and applying a predetermined safe gain setting to the photodiode if a potential overload state is detected. The potential overload state may be a loss of signal condition, or detection of an overload optical power incident the photodiode.

Abstract: A method and apparatus for protecting a photodiode of an optical receiver from overload optical signals by monitoring an operating parameter of the photodiode, determining if the operating parameter indicates that the photodiode is in a potential overload state in which the photodiode is susceptible to an overload optical signal; and applying a predetermined safe gain setting to the photodiode if a potential overload state is detected. The potential overload state may be a loss of signal condition, or detection of an overload optical power incident the photodiode.