CN1554159A

5G,4G,3G

Title

Method and apparatus for time-aligning transmissions from multiple base stations in a CDMA communication system

Application Number:

CN2002817537

Publication Date:

08-12-2004

Current Assignee:

Family ID:

Application Date:

09-07-2002

Declaring Company:

Publication Country:

US

Priority Date:

09-07-2001

Title

Method and apparatus for time-aligning transmissions from multiple base stations in a CDMA communication system

Application Number:

CN2002817537

Family ID:

Publication Country:

US

Publication Date:

08-12-2004

Application Date:

09-07-2002

Priority Date:

09-07-2001

Current Assignee:

Declaring Company:

Abstract  Abstract

some suitable from multiple base stations to the time sent by the terminal alignment scheme. In order to obtain time alignment viewed at the terminal to determine from the difference between the arrival time of the transmission base station of and provided to the system and used for adjusting timing at the base station the terminal-specific radio frames at a specific timing window can arrive at the terminal. In one aspect the time difference between two base stations into a frame-level time difference and a chip-level time difference. whenever the requests to perform and report time difference measurements the terminal measures each candidate base station chip relative to a reference base station. Additionally the terminal also measures the frame-level timing and only the information comprising the time difference in measured value when necessary. otherwise setting the frame-level part to a predetermined value (e.g. zero).

Schemes to time-align transmissions from multiple base stations to a terminal. To achieve time-alignment differences between the arrival times of transmissions from the base stations as observed at the terminal are determined and provided to the system and used to adjust the timing at the base stations such that terminal-specific radio frames arrive at the terminal within a particular time window. In one scheme a time difference between two base stations is partitioned into a frame-level time difference and a chip-level time difference. Whenever requested to perform and report time difference measurements the terminal measures the chip-level timing for each candidate base station relative to a reference base station. Additionally the terminal also measures the frame-level timing and includes this information in the time difference measurement only if required. Otherwise the terminal sets the frame-level part to a predetermined value (e.g. zero).

Schemes to time-align transmissions from multiple base stations to a terminal. To achieve time-alignment differences between the arrival times of transmissions from the base stations as observed at the terminal are determined and provided to the system and used to adjust the timing at the base stations such that terminal-specific radio frames arrive at the terminal within a particular time window. In one scheme a time difference between two base stations is partitioned into a frame-level time difference and a chip-level time difference. Whenever requested to perform and report time difference measurements the terminal measures the chip-level timing for each candidate base station relative to a reference base station. Additionally the terminal also measures the frame-level timing and includes this information in the time difference measurement only if required. Otherwise the terminal sets the frame-level part to a predetermined value (e.g. zero).

Note:

The information in blue was extracted from the third parties (Standard Setting Organisation, Espacenet)

The information in grey was provided by the patent holder

The information in purple was extracted from the FrandAvenue

Explicitly disclosed patent:openly and comprehensibly describes all details of the invention in the patent document.

Implicitly disclosed patent:does not explicitly state certain aspects of the invention, but still allows for these to be inferred from the information provided.

Basis patent:The core patent in a family, outlining the fundamental invention from which related patents or applications originate.

Family member:related patents or applications that share a common priority or original filing.