摘要:
Disclosed is a method performed by a base station (200) in a wireless communication system for controlling communication resources to a plurality of antenna sites (231, 232, 233, 234) of the base station, the base station providing communication resources as a number of antenna carriers providing IQ data flows (IQ1, IQ2, IQ3) to the plurality of antenna sites. The method comprises: estimating (302) traffic load on individual of the plurality of antenna sites (231, 232, 233, 234), and distributing (312) the number of antenna carriers to the plurality of antenna sites based on the estimated traffic load on individual of the plurality of antenna sites.
摘要:
Method and system for transmission of carrier signals, each of which occupy a different radio-frequency band, between first and second antenna networks (14, 15), each comprising a plurality of distributed antenna's (6), with the first antenna network (14) being coupled to a main coupling device (3) and to an intermediate coupling device (21), the second antenna network (15) being coupled to the intermediate coupling device (21), and with the coupling devices (3, 21) being coupled to one or more peripheral devices (8, 22), wherein the intermediate coupling device (21) is controlled to have a carrier signal frequency band of the second antenna network (15) occupied by a carrier signal which is exchanged with a peripheral device (8) which is coupled to the main coupling device (3) or with a further peripheral device (22) which is coupled to the intermediate coupling device (21).
摘要:
In a cellular communications network (10), additional control signals comprising virtual base station identification data are distributed in the radio system from well defined locations by e.g. transmitters (7A-G). Since there is a connection between each virtual base station identification data and the location from where it is transmitted, a mobile terminal (6) can use the information for improving its position estimation according to conventional procedures. No modifications of the mobile terminals (6) are therefore necessary. The mobile terminal (6) is not able to connect to the communications system (10) using the virtual base station identification data, since this data only is intended for position estimating purposes. In such a way, the devices for providing the additional information necessary for the improved position estimation can be made very simple and inexpensive.
摘要:
According to one or more embodiments, a directional filter assembly (10) comprises a multi-port filter circuit (12) for combining or separating signals in specified pass-bands and an isolated port (20) having a resistive load (22), for absorbing out-of-band signals. The assembly further includes a reflective protection device (24) configured to protect the resistive load (22) from being overpowered by out-of-band signal power, based on being configured to reflect or not reflect the out-of-band signals in dependence on the level of out-of-band signal power. In at least one embodiment, the directional filter assembly is configured as a microwave transmission assembly, such as is used for combining signals from two or more base stations, for transmission from a common antennae assembly.
摘要:
A base station includes multiple sector antenna units. Each sector antenna unit has an antenna for receiving a carrier signal associated with an antenna frequency in an available frequency band. The base station is converted between a multiple sector base station configuration and a multi-sector, omni-base station configuration. In a diversity base station implementation, each sector antenna unit receives a diversity signal from a first sector, and the second diversity antenna unit receives a diversity signal from a second different sector. If one sector antenna unit does not perform properly so that one of the sector diversity signals is lost or corrupted, the other sector diversity signal is still useable. The base station may be reconfigured to power-down at least some part of the transmit side without having to power-down some or all of the receive side.
摘要:
The present invention relates to a method and an apparatus (20) for a radio frequency component (10), RF component, for use in antenna systems, wherein the RF component ( 10) is adapted to guide direct current, DC, power signals; control signals and RF signals, and wherein the RF component (10) is adapted to separate the DC power signals and the control signals from the RF signals. The apparatus according to the present invention comprises an impedance matching network interface (21) adapted to match at least one control signal of the separated control signals to at least one predetermined impedance value; and a DC and signalling controller (22) that is adapted to control, along DC paths, the DC power signals to at least a first port of the RF component (10), and adapted to control, along signalling paths, the control signals to at least a second port of the RF component (10), whereby the DC power signals and the control signals are controlled independently of each other. The present invention also relates to a radio frequency component that comprises an internal and/or an external interface used to connect the apparatus (10).
摘要:
The invention presents a filter combiner, in particular for mobile communications applications, adapted to be connected to an antenna (12), comprising a first directional coupler (13), connected to at least one first filter (15, 15a, 15b), to an antenna branch (12a), to at least one second filter (17, 17a, 17b), and to a first signal branch (20), the combiner also comprising a second directional coupler (21), connected to the at least one first filter (15, 15a, 15b), to a second signal branch (25), and to the at least one second filter (17, 17a, 17b). Further, the first directional coupler (13) is adapted to be connected to the first signal branch (20) via at least one third filter (29, 29a, 29b).