Code transmission over timeslots and antennas

• US 8,228,886 B2
• Filed: 04/20/2005
• Issued: 07/24/2012
• Est. Priority Date: 09/06/1994
• Status: Expired due to Fees

• Current Assignee: Intel Corporation
• Original Assignee: Interdigital Technology Corporation (InterDigital, Inc.)
• Inventors: Bolgiano, D. Ridgely, LaVean, Gilbert E.
• Primary Examiner(s): Sefcheck, Gregory
• Assistant Examiner(s): Rivas, Salvador E
• Application Number:
  US11/110,178
• Publication Number:
  US 20050249178A1
• Time in Patent Office: 2,652 Days
• Field of Search: 370/331, 370/338, 370/350, 370/503
• US Class Current: 370/342
• CPC Class Codes: G01S 5/10 Position of receiver fixed by co-ordinating a plurality of position lines defined by path-difference measurements , e.g. omega or decca systemsG01S5/12 takes precedence ; beacons and receivers cooperating therewith G01S1/306, G01S1/308
• CPC Class Codes: G01S 5/14 Determining absolute distances from a plurality of spaced points of known location
• CPC Class Codes: H01Q 21/29 Combinations of different interacting antenna units for giving a desired directional characteristic H01Q25/00 takes precedence
• CPC Class Codes: H04B 7/022 Site diversity; Macro-diversity using two or more spaced independent antennas H04B7/04
• CPC Class Codes: H04B 7/0671 using different delays between antennas
• CPC Class Codes: H04B 7/082 selecting best antenna path
• CPC Class Codes: H04B 7/0857 using maximum ratio combining techniques, e.g. signal-to- interference ratio [SIR], received signal strenght indication [RSS]
• CPC Class Codes: H04B 7/0888 with selection
• CPC Class Codes: H04W 56/00 Synchronisation arrangements
• CPC Class Codes: H04W 64/00 Locating users or terminals or network equipment for network management purposes, e.g. mobility management

Abstract

A code is provided for transmission. The code is transmitted over a first antenna in a first time slot and the code is not transmitted over a second antenna in the first time slot. The code is transmitted over the second antenna in a second time slot and the code is not transmitted over the first antenna in the second time slot.

Claims

1. A method for use by a code division multiple access (CDMA) cellular base station having a first and a second antenna, the method comprising:

transmitting a first synchronization code from the first antenna during a first time slot, a duration of said transmission of said first synchronization code being less than a duration of the first time slot;

transmitting a second synchronization code from the second antenna during a second time slot, a duration of said transmission of said second synchronization code being less than a duration of the second time slot, wherein the first and second synchronization codes differ between base stations and base stations are distinguished using the synchronization codes; and

transmitting control information over a control channel that is aligned with the first and second synchronization codes, wherein the control channel is spread using a CDMA code.

2. The method of claim 1 wherein the CDMA code includes a PN code.

3. The method of claim 1 wherein the first antenna and the second antenna are spatially separated.

4. A code division multiple access (CDMA) cellular base station comprising:

a first antenna;

a second antenna;

circuitry configured to transmit a first synchronization code from the first antenna during a first time slot, a duration of said transmission of the first synchronization information being less than a duration of the first time slot;

circuitry configured to transmit a second synchronization code from the second antenna during a second time slot, a duration of said transmission of the second synchronization codes being less than a duration of the second time slot, wherein the first and second synchronization codes differ between base stations and base stations are distinguished using the synchronization codes; and

circuitry configured to transmit control information over a control channel that is aligned with the first and second synchronization codes, wherein the control channel is spread using a CDMA code.

5. The CDMA base station of claim 4 wherein the CDMA code includes a PN code.

6. The CDMA base station of claim 4 wherein the first antenna and the second antenna are spatially separated.

7. A code division multiple access (CDMA) cellular subscriber station comprising:

an antenna configured to receive a transmission of a first synchronization code from a base station during a first time slot, a duration of the transmission of the first synchronization code being less than a duration of the first time slot, the antenna further configured to receive a transmission of a second synchronization code during a second time slot, a duration of the received transmission of the second synchronization code being less than a duration of the second time slot;

circuitry coupled to the antenna and configured to receive the first and second synchronization codes, wherein the CDMA subscriber station is configured to be synchronized with the base station using the first and second synchronization codes;

circuitry configured to determine information associated with the base station based on the first and second synchronization codes, wherein the first and second synchronization codes differ between base stations and base stations are distinguished using the synchronization codes; and

circuitry configured to receive control information over a control channel spread using a CDMA code in a plurality of time slots, wherein each time slot includes a synchronization code being less than a duration of the time slot and the control information of the control channel.

8. The CDMA subscriber station of claim 7 wherein the CDMA code includes a PN code.

9. A method for use in a code division multiple access (CDMA) cellular subscriber station having an antenna, the method comprising:

receiving a transmission of at least a first synchronization code from a base station with the antenna during a first time slot, a duration of the received transmission of the first synchronization code being less than a duration of the first time slot; and

receiving, a transmission of at least a second synchronization code from a base station with the antenna during a second time slot, a duration of the received transmission of the second synchronization code being less than a duration of the second time slot;

synchronizing the CDMA cellular subscriber unit with the base station using the first and second synchronization codes, wherein the first and second synchronization codes differ between base stations and base stations are distinguished using the synchronization codes;

determining information associated with the base station based on the first and second synchronization code; and

receiving control information over a control channel spread using a CDMA code in a plurality of time slots, wherein each time slot includes a synchronization code being less than a duration of the time slot and the control information of the control channel.

10. The method of claim 9 wherein the CDMA code includes a PN code.