摘要:
A cellular communication system comprises a base station which is arranged to support user equipments associated with a plurality of operators or Private Land Mobile Networks (PLMNs). The base station comprises a first unit determining a first operator/PLMN of the plurality of operators/PLMNs serving a first user equipment. A second unit then generates a first message comprising an indication of the first user equipment and an indication of the first operator/PLMN. The first message is transmitted to a management entity of a fixed network of the cellular communication system. The system may allow improved support for equipment sharing in cellular communication networks.
摘要:
This invention relates to a method of estimating a characteristic of a signal such as a time of arrival or a transmitter identity in particular in a cellular communication system. Most known techniques have limited performance as they rely on limited amounts of known data. The method of the invention comprise a first step (201) of receiving the signal at a subscriber unit. In a second step (203) the subscriber unit receives assistance data from the fixed network and in a third step (205) an expected signal is derived in response to this assistance data. For GSM the assistance data can be a frame number and a BSIC permitting an entire expected SCH burst to be derived. In a fourth (207) step the signal characteristic is determined by correlation of the received signal and the expected signal. The invention is particularly applicable to location determination in a GSM communication system.
摘要:
A cellular communication system comprises a base station which can to operate in a restricted mode wherein support is restricted to user equipments of a first associated set of user equipments, such as a Closed Subscriber Group. The base station comprises a profile unit which determines a first transmit power profile where the first transmit power profile is indicative of the base station operating in the restricted mode. The base station further comprises a transmitter for transmitting at least one common channel, such as a pilot signal or a broadcast signal, with a transmit power according to the first transmit power profile. User Equipments may measure the power profile to evaluate whether the base station employs restricted access. The invention may in particular reduce the number of access attempts to restricted base stations by non-eligible User Equipments.
摘要:
A system and method for resolving conflicting physical cell identification in a wireless communication system includes a first step 200-204 of detecting a physical cell identification conflict. A next step 206 includes correcting a neighbour relation table in response to the conflict. A next step 208 includes receiving an ambiguous physical cell identification. A next step 210 includes resolving the ambiguous physical cell identification.
摘要:
A method and apparatus for transmitting data in a radio communication system includes a data segmenter (203) segmenting data into data segments that are fed to a transmission encoder (205) which encodes them into transmission blocks having different energy per information bit levels. The transmission blocks are transmitter and feedback information is received from the remote radio station (216). An analysis processor (219) determines an analysis group that comprises at least two data segments having transmission blocks encoded with different energy per information bit levels. The analysis processor (219) further generates a performance distribution measure relating to the analysis group in response to the feedback information. A transmission controller (207) selects a transmission scheme to apply to subsequent data segments in response to the performance distribution measure.
摘要:
The amount of interference to communications in Time Division Duplexing (TDD) mode between a TDD mobile and a TDD base station from a mobile operating in Frequency Division Duplexing (FDD) mode that is located near to the TDD base station can be reduced by passing information regarding the interfering FDD signal to the TDD base station, where it is processed and subtracted from the received TDD signal, which includes the interference, so as to obtain the pure TDD signal, as required. Either the FDD data (22), or an FDD signal (23) regenerated from the FDD data or simply the received FDD signal (21) can be passed (24) to the TDD base station. The TDD base station can regenerate an FDD signal, if required, which is then filtered (25) using TDD filters and normalized by correlating (26) and scaling (27) the filtered FDD signal to a received TDD signal. The normalized FDD signal is then subtracted (28) from the received TDD signal to reduce the interference.
摘要:
A refrigerator having a freezer compartment having an ice maker disposed within the freezer compartment for forming ice pieces and an ice storage bin removably mounted to freezer compartment door below the ice maker having an open top receptacle for receiving ice pieces from the ice maker. The ice storage bin has a movable lid assembly including a frame removably mounted to the top of the ice storage bin and two lid members mounted to the frame. At least one lid member is pivotally mounted to the frame to close the receptacle when pivoted to a generally horizontal position and to open the receptacle when pivoted to a generally vertical position. The pivotal lid member is biased to the generally horizontal position.
摘要:
A method and apparatus for radio frequency (RF) fingerprint distribution is provided herein. In particular, when a mobile node wishes to access a restricted-access base station, the mobile node will access a database containing RF fingerprint identification information for the RF environment surrounding the restricted-access base station. When the RF environment matches the RF fingerprint, the mobile node will know that it can access the restricted-access base station.
摘要:
A cellular communication system comprises an access point (101) which supports an underlay cell of a first cell on an underlay frequency using another frequency. A proximity detector (113) detects user equipment (109) in response to a wireless transmission therefrom, which uses a different transmission technology from a transmission of the cellular communication system. In response to the proximity detection, the access point (101) temporarily transmits a pilot signal on the first cell frequency. The user equipment (109) is then switched to the access point (109) and the underlay frequency in response to a detection indication from the user equipment (109) indicating that the pilot signal has been detected. Following the switch the access point (101) terminates the transmission of the pilot signal.
摘要:
A method and apparatus for radio frequency (RF) fingerprint distribution is provided herein. In particular, when a mobile node wishes to access a restricted-access base station, the mobile node will access a database containing RF fingerprint identification information for the RF environment surrounding the restricted-access base station. When the RF environment matches the RF fingerprint, the mobile node will know that it can access the restricted-access base station.