초록 ▼

A TDMA/CDMA radio communications system provides frequency channels which are formed both by time slots and by broadband frequency ranges, and in which information from a plurality of connections can be simultaneously transmitted between mobile stations and a base station wherein it is possible to d

A TDMA/CDMA radio communications system provides frequency channels which are formed both by time slots and by broadband frequency ranges, and in which information from a plurality of connections can be simultaneously transmitted between mobile stations and a base station wherein it is possible to distinguish the information from different connections in accordance with a connection-specific fine structure. Frequency channels are repeatedly provided for frequency synchronization of the mobile stations in the downward direction in which a symbol sequence is transmitted. From received signals, the mobile station to be synchronized determines estimated values for the symbol sequence and compares these estimated values with a reference sequence. It is thereby possible to calculate a phase drift in the estimated values with reference to the reference sequence wherein a frequency offset, which is used for frequency synchronization, is determined from the phase drift.

대표청구항 ▼

A TDMA/CDMA radio communications system provides frequency channels which are formed both by time slots and by broadband frequency ranges, and in which information from a plurality of connections can be simultaneously transmitted between mobile stations and a base station wherein it is possible to d

A TDMA/CDMA radio communications system provides frequency channels which are formed both by time slots and by broadband frequency ranges, and in which information from a plurality of connections can be simultaneously transmitted between mobile stations and a base station wherein it is possible to distinguish the information from different connections in accordance with a connection-specific fine structure. Frequency channels are repeatedly provided for frequency synchronization of the mobile stations in the downward direction in which a symbol sequence is transmitted. From received signals, the mobile station to be synchronized determines estimated values for the symbol sequence and compares these estimated values with a reference sequence. It is thereby possible to calculate a phase drift in the estimated values with reference to the reference sequence wherein a frequency offset, which is used for frequency synchronization, is determined from the phase drift. lue in said data store; and retrieving said updated value from said data store into said selected element. 11. The method of claim 9 further including polling said data store to determine if an updated control parameter value for said selected element is available. 12. The method of claim 1 further comprising analyzing a second portion of reported operating parameter information to determine whether a service quality of at least a second portion of said network conforms with predetermined service quality criteria. 13. The method of claim 12 further including reporting information to an administration system based upon said analysis of said second network portion, said information relating to service quality aspects not meeting said service quality criteria. 14. The method of claim 13 further including modifying said selected guidelines in response to notification of said information relating to service quality aspects not meeting said service quality criteria. 15. The method of claim 1 further comprising: providing an event registration system for requesting notification of at least one event; determining whether said at least one event has occurred; and providing notification of occurrence of said event to at least one registered party. 16. A computer program product comprising a computer readable medium having computer code embodied therein for implementing the method of claim 1. 17. A method for providing dynamic updating of frame relay network element parameters over a data network, the data network including a plurality of frame relay network elements, each of said frame relay network elements having a plurality operating parameters associated therewith, said operating parameters being related to at least one control parameter of said element, said method comprising: reporting operating parameter information related to a first subset of frame relay network elements to a data store; analyzing at least a portion of said reported operating parameter information according to predetermined guidelines; calculating updated control information for at least one frame relay network element in response to said analysis of said operating parameter information; providing said updated control information to said element; and configuring said frame relay network element in accordance with said updated control information to thereby affect operation of said frame relay network element. 18. The method of claim 17 further including: storing said updated control information at said data store; monitoring said data store for availability of updated control information; notifying said frame relay network element of said updated control information at said data store; and retrieving said updated control information into said frame relay network element in response to said notification. 19. An adaptive feedback system in a data network comprising: a plurality of frame relay network elements, each of said frame relay network elements having a plurality operating parameters associated therewith, said operating parameters being related to at least one control parameter of said element; a data store operable to store operating parameter information reported by a first portion of frame relay network elements; a policy engine operable to analyze at least a portion of said reported operating parameter information based upon selected guidelines to determine whether a performance of at least a portion of said network conforms with predetermined criteria, said policy engine being further operable to calculate updated control information for at least one frame relay network element in response to said analysis of said operating parameter information; said frame relay network element being operable to configure itself using said updated control information to thereby affect operation of said element. 20. The feedback system of claim 19 wherein said data store is implemented as a directory server utilizing a directory acce