In response to a testing instruction from a PHSC, the cell range of CS 4a is expanded from a range indicated by a solid line to another range indicated by a broken line in which CS 4a can communicate with CSs 4b, 4g and 4f as well as other CSs not shown adjacent to CS 4a. Under the control of the PHSC, test calls are successively produced from CS 4a and transmitted to CSs 4b, 4g, 4f and all other adjacent CSs not shown to confirm the normality of connection. Then, in a similar manner as described above, the PHSC repeats this operation successively for all CSs and confirms the normality of the CSs from obtained results. When an abnormal condition is found out in a test result, the PHSC analogizes from a combination of test routes to specify the abnormal CS.
A network cellular communication system with power based locator system in which the location of a mobile communication unit within the network can be determined approximately. In particular, the power based locator system includes a pre-stored map of locations of a plurality of base stations within the network and the respective network cell coverage areas for those base stations. Each of the plurality of base stations is able to change the size of its respective cell by varying transmitter and receiver power levels. By incrementally changing its respective cell coverage area, the base station can effectively narrow down the region in which a mobile communication unit is located. The region information is correlated with the pre-stored map of locations to determine approximately where in the cellular communication network the mobile communication unit is located. Additionally, the present invention affords for substantially continuous connectivity of most or all mobile communication units to the network backbone, even when one of the plurality of base stations reduces the size and/or shape of its respective cell in order to locate a mobile communication unit.
The present invention relates to test transmitter for verifying the positioning of antennas in a mobile telecommunications system and a method for manufacturing such a test transmitter that is particularly well suited for indoor use. A mobile terminal is modified so that it can transmit in the downlink frequency band, and preferably so that it can transmit one or more of the signal types used for downlink signalling, used in the mobile telecommunications system.
A radio communication system (100) employs a method for setting an output power of a base site (e.g., 107) in the system. The radio communication system includes at least two base sites (101-107) and a communication path (109, 131-137) coupling the base sites together. A first base site (e.g., 107) transmits a signal (147) via a radio communication resource. A second base site (e.g., 101) receives the signal and determines a signal quality metric of the received signal. Upon determining the signal quality metric, the second base site generates and conveys a message to the first base site via the communication path, wherein the message instructs the first base site to adjust an output power of the first base site. The first base site then adjusts its output power responsive to the message.
A communication system uses its existing resources to test base stations, without requiring dedicated test equipment. The communication includes scattered base stations that in a normal operating mode, transmit communication signals to mobile stations over downlink RF channels and receive communication signals from the mobile stations over uplink RF channels. At least one base station of the communication system is responsive to a test command for placing the base station in a test mode. In the test mode, a receiver section of the testing base station receives test signals from a tested base station over a downlink RF channel for testing its transmitter path, the testing base station includes a transmitter section that in the test mode transmits test signals to the other base station over an uplink channel for testing its receiver path.
In the method of making downlink operational measurements a measurement request from one of a main controller and a first base station is sent to at least a second base station. The measurement request requests the second base station to instruct mobile terminals in communication therewith to make operation measurements of at least one signal transmitted by the first base station. The second base station transmits a measurement instruction to the mobile terminals in communication therewith in response to the measurement request. The measurement instruction instructs the mobile terminals in communication with the second base station to make operational measurements of the signal transmitted from the first base station. Then the second base station receives results of the operational measurements from the mobile terminals in communication therewith. Alternatively or in addition, the second base station makes the operational measurements.
