Abstract:
A method and apparatus for obtaining relevant measurement data for analysis of radio network (10) performance. Measurement data (M1-M4) from different network entities (E1-E4) is collected and saved regularly (100). As each saved batch of data is shorter than the total time, temporal accuracy is improved as the time window for when an event could have occurred is shortened. Data processing starts by finding (102) all entities (E2-E4) (usually cells (C1-C4) that potentially interface with the entity (E1) being analysed. The entities (E1-E4) are then classified (104) according to link usage. The measurement data (M1-M4) is filtered (106) to obtain only those records that correspond to a certain network (10)traffic scenario. The output data (108) is suitable for statistical calculations are performed (108) to obtain the results of the analysis.
Abstract:
Headerless (i.e., zero byte) data packets are sent by a compressor over a radio bearer. The radio bearer includes a synchronized wireless link. A sequential timer-based value is associated with each of the headerless data packets. A decompressor generates a header based on the sequential timer-based value associated with a given received headerless data packet. A data packet having a compressed header is sent periodically over the synchronized wireless link. The data packet having the compressed header can also be sent when the compressor detects changes in slowly-varying header fields, in response to feedback received from the decompressor indicating that a decompression context is out of synchronization and/or just before talk spurts occur.
Abstract:
A cell structure and associated method of cell and frequency planning are presented which reduce co-channel interference between nearby co-channel cell sites. The cell and frequency planning method involves the definition of a number of frequency channel sub-groups (SG) within each existing cell (10). Each frequency channel sub-group includes a number of frequency channels being broadcast at particular power levels ranging from low power to high power. During a mobile station call (360), the lowest, yet sufficient power level is used for the call (361). The cell sites are configured such that the frequency channel sub-groups being broadcast at the higher broadcast powers are transmitted at lower broadcast powers in nearby co-channel cell sites.
Abstract:
A cellular communication system and method for determining cell relations between cells is disclosed. The cellular communication system transmits signals from one or more transmitters, for example, mobile stations or base stations, ove r a plurality of radio frequency channels that are assigned to the cells. The transmitted signals over the plurality of radio frequency channels are received at each one of the cells and their received signals strengths are measured at corresponding measurement times. The received signal strength measurements and corresponding measurement times ar e processed to determine whether a measured received signal strength at a corresponding measurement time is based on a transmission from a single transmitter in a cell. The measurements corresponding to signals found originated from single transmitters are used for determining the cell relations in terms of such parameters as path gain values or C/I ratios.
Abstract:
A cellular communication system and method for determining cell relations between cells is disclosed. The cellular communication system transmits signals from one or more transmitters, for example, mobile stations or base stations, over a plurality of radio frequency channels that are assigned to the cells. The transmitted signals over the plurality of radio frequency channels are received at each one of the cells and their received signals strengths are measured at corresponding measurement times. The received sign al strength measurements and corresponding measurement times are processed to determine whether a measured received signal strength at a corresponding measurement time is based on a transmission from a single transmitter in a cell. The measurements corresponding to signals found originated from single transmitters are used for determining the cell relations in terms of such parameters as path gain values or C/I ratios.
Abstract:
Headerless (i.e., zero byte) data packets are sent by a compressor over a radio bearer. The radio bearer includes a synchronized wireless link. A sequential timer-based value is associated with each of the headerless data packets. A decompressor generates a header based on the sequential timer-bas ed value associated with a given received headerless data packet. A data packet having a compressed header is sent periodically over the synchronized wirele ss link. The data packet having the compressed header can also be sent when the compressor detects changes in slowly-varying header fields, in response to feedback received from the decompressor indicating that a decompression context is out of synchronization and/or just before talk spurts occur.
Abstract:
Headerless (i.e., zero byte) data packets are sent by a compressor over a radio bearer. The radio bearer includes a synchronized wireless link. A sequential timer-based value is associated with each of the headerless data packets. A decompressor generates a header based on the sequential timer-based value associated with a given received headerless data packet. A data packet having a compressed header is sent periodically over the synchronized wireless link. The data packet having the compressed header can also be sent when the compressor detects changes in slowly-varying header fields, in response to feedback received from the decompressor indicating that a decompression context is out of synchronization and/or just before talk spurts occur.
Abstract:
Utilizing a sequential local search optimization algorithm (30), a determination is made of the cell/transceiver retunes (32) needed to implement, given a current frequency plan, a better frequency plan for a certain cellular communications system. Each of the individual cell/transceiver retunes is evaluated (34) to determine if it meets certain save criteria, and if so, is saved as an intermediate frequency plan (74) in a sequence of saved intermediate frequency plans necessary to migrate from the current frequency plan to the determined near-optimal frequency plan. A sequential implementation (36) of these intermediate frequency plan revision s is then made to gradually reach, in a known and controlled manner, the bette r frequency plan.