TH19036B - Navigation assistance for handling calls in a mobile phone system. - Google Patents

Abstract

In mobile radio phone systems using TEMA and CDMA Mobile units often need to determine the appropriate timing and power required for transmission to broadcasting base stations. Base stations allow mobile stations to estimate the mobile station's distance from each base station with: Based on the average signal strength received And hence The information of diffusion may include the average radial distribution of the signal strength and the distance from this diffusion information. The mobile station determines the propagation loss for transmission to the base station and sets the appropriate timing and power level for the transmission. Correspondingly, the mobile station sends a signal to the base station at the scheduled signal timing and the power level it is assigned for.

Claims (6)

1. In a multi-access spectral communication system, a methodology for the establishment of communication between a mobile station and a base station includes the procedure of: broadcasting the signal to such mobile station from at least one base station. station Where transmission signals from at least one base station will include information; At least one base station broadcasting reception is reached at the mobile station. Determination of the average signal strength of such incoming propagation and estimation of the distance between the mobile station and at least one such station Based on such information And the aforementioned average signal strength of the incoming broadcast signal. 2. Methodology consistent with claim 1 that follows the procedure of To define the default power level to be used by the station at To initiate at least one base station transmission to at least one base station using the distance obtained from such estimation 3. Methodology consistent with claim 2. This also includes the steps of: Determining the timing for transmission based on reference of such information timings of the broadcast signal and the approximate distance thereof; And transmitting signals from the mobile station to at least one such base station in a manner consistent with the timing for transmission of such time-scheduled signal; Clause 2. Where such information in such broadcasting signals includes signal strength at a variable distance from at least one such base station, 5. Methodology consistent with claim 4, where information The broadcast signal also includes the distance and delay of propagation from at least one base station and at least the surrounding base station. 5 Where such information in the broadcast signal includes An angle indicating at least one base station with the surrounding base station 7. Methodology consistent with claim 6, provided that the information in the said broadcasting signal includes The absolute location of at least one such base station and the unique identifier code of at least one of the base stations. 8. The methodology consistent with claim 2, which also includes The procedure is to transfer the mobile station to at least one such base station. The approximate distance between at least one such base station and the mobile station. And the average signal strength received by the mobile station 9. Methodology consistent with Clause 8, which also includes the procedure of: determining the timing for transmission based on The reference value of such information time arrangement of the signal of diffusion and the approximate distance thereof; And reporting from the mobile station to at least one such station with the scheduled transmission time for which the signal has been determined 1 0. Procedures consistent with Clause 9, which It also includes the process of determining the signal strength of at least one base station at at least one such base station at different distances by averaging past signal strengths. Reports from other mobile stations At a similar distance from at least one of the aforementioned base stations 1 1. Methodology consistent with claim 10, which also includes further: reporting from other mobile stations. With the approximate distance between the other mobile station and at least one such station; Identifying each other mobile station that is at a similar distance from at least one of the base stations by the estimated distance reported to them 1 2. Methodology consistent with the claim clause. 11 Where at least one other base station will be allocated a reference time with one of them. 1. 3. The methodology consistent with claim 12 is also included. Procedures of: Reporting from Any other base station to at least one such base station. With the time of arrival of a mobile station signal relative to the timing reference value of at least one such base station through a radio link network or terrestrial line; And identifying such other mobile stations that are at least one such distance from the base station by using the time of arrival of the report and the estimated distance reported to it. The spectrum extends a multi-access type, a methodology for establishing communication between a mobile station and a base station, which includes the steps of; Broadcasting to the mobile station from one base station Where the broadcast signal of the aforementioned base station includes information one, including the signal strength profile at different distances from that first base station in the wide direction of that base station. Two: Broadcasting the signal to the mobile station from the aforementioned second base station. Where the second base station broadcast signal will include the second information including the signal strength profile at different distances from that base station in the wide direction of the first base station as follows. say Measurement of the average signal strength of the propagation of the aforementioned base station and the signal of the propagation of that second base station; Determining whether the directional angle of the station traveling from the first base station is in the broad direction of the second base station Based on the first such information The second information And the measured average signal strength; And estimating the distance from the mobile station to the first base station using the aforementioned base station edge signal strength profile. If the directional angle is in the broad direction of the second base station 1 5. Methodology consistent with Clause 14 where the first information refers to the unified identifier code in order to identify the second base station. 1 6. Provides multi-access spectral communication systems, a methodology for establishing communication between a mobile station and a base station assigned to such mobile station, including the procedure of: reception of broadcast signals from the station. The designated base entered at the mobile station; Measuring the incoming signal strength of the signal of diffusion; Estimation of the position of the station based on the strength of the received signal; And to determine the appropriate advance timing for transmission from the mobile station to the designated base station in a manner consistent with the estimated location. 1 7. Procedures consistent with Clause 16, which also includes further. Also steps of: reception of the broadcast from at least one surrounding base station; And a measure of the difference in timing between the signals of diffusion received from at least one surrounding base station. Where such steps of mobile station location estimation are further grounded on the measured time difference variance 1 8. Methodology consistent with claim 17, where the signal of At least one such spread from surrounding base stations. This includes the signal strength profiles along the lines that connect the designated base station to at least one of the surrounding base stations. 1. 9. Methodology consistent with Clause 18, which also continues. With the steps of The reception of broadcast signals from surrounding station first station and base station next to the second station. This includes the radial distance and directional angle between the one peripheral base station and the second peripheral base station. The first peripheral base station is in close proximity to the aforementioned second base station 2 0. Methodology consistent with Clause 18 whereby the broadcast signal received by the mobile station will It is a synchronized transmission from the designated base station and at least one surrounding base station. 1.The methodology consistent with claim 16, whereby the location estimation procedure also includes steps of mobile station speed estimation 2. 2. Methodology consistent with claim 21, that estimates the velocity is determined using the Kalman 2 filter technique. 3. Methodology consistent with claim 16, where such advance scheduling will coincide with twice the delay of broadcasting over the distance from the mobile station to the specified base station 2. 4.In a multi-access spectral communication system, a methodology for establishing communication between a mobile station and a base station assigned to such mobile station includes the procedure of: broadcasting from surrounding base stations. And the specified station: where the signal of diffusion includes information of the directional angle Reception of the transmission at the mobile station Calculation of the direction angle of the aforementioned base station and that peripheral base station relative to the mobile station. Based on the signal of diffusion Estimation of the distance from this station to a specified base station and the timing of the signal for the transmission of the signal from the mobile station to the specified station in a manner consistent with the calculated direction angle as follows. And the transmission of the said signal from the moving station to the specified base station with an approximate arrangement of the signal 2 5. Methodology consistent with claim 24, whereby the aforementioned procedures of the estimation will include further, by determining the delay of propagation from such mobile station to the designated base station. Where the signal delay is approximately equal to twice the delay of the propagation 2. 6. Methodology consistent with claim 25, where the signal for propagation is broadcast by the use of a phase-rated antenna.