Cellular network system and method

• US 20050002323A1
• Filed: 05/13/2004
• Published: 01/06/2005
• Est. Priority Date: 05/09/2003
• Status: Abandoned Application

• Current Assignee: Zion Hadad
• Original Assignee: Zion Hadad
• Inventors: Hadad, Zion
• Application Number:
  US10/844,519
• Publication Number:
  US 20050002323A1
• Time in Patent Office: Days
• US Class Current: 370/203
• CPC Class Codes: H04L 27/2601 Multicarrier modulation systems
• CPC Class Codes: H04L 5/023 Multiplexing of multicarrier modulation signals multicarrier modulation H04L27/2601
• CPC Class Codes: H04L 5/143 for modulated signals H04L5/1469 takes precedence
• CPC Class Codes: H04W 16/10 Dynamic resource partitioning

Abstract

A Cellular network system wherein the physical layer as defined in 802.16a includes means for its optimization for mobile operators for improved reliability, coverage, capacity, user location, fully scalability, and mobility from 2-6 Ghz, while working in a reuse of 1. The same RF frequency is allocated to all sectors in the cell. The system further includes means for its operation in a Coordinated Synchronous mode, wherein permutations, collisions and averaging interferences from other cells cause limitations on the use of high QAM modulations, which sometimes can increase capacity up to three times (64 QAM instead QPSK).

Claims

1. A Cellular network system wherein the physical layer as defined in 802.16a, comprising means for its optimization for mobile operators for improved Reliability, coverage, capacity, user location, fully scalability, and mobility from 2-6 Ghz, while working in a reuse of 1, wherein the same RF frequency is allocated to all sectors in the cell.

2. The Cellular network system according to claim 1, further including means for its operation in an Asynchronous mode with the system using any ref ck for creating the frames in that case each BS is using different permutations and collision between two users is happening throw frequency shift of the BSs and time shifts between frames, Inside the BS the sub channels are orthogonal, between BS/Sector the fact that each BS using different permutations per sub channel and different randomizers on the data create a controlled collision between the different BS users where few sub carriers collision are happening.

3. The Cellular network system according to claim 1, further using FEC, this enabling the system to operate with a reasonable capacity but with limited coverage like 90%, to achieve fast and low cost reasonable coverage with longer HO time.

4. The Cellular network system according to claim 3, wherein in TDD using the 802.16 time stamp to synchronize the frames and UL/DL timing between BS and different operators.

5. The Cellular network system according to claim 1, wherein including means for its operation in a synchronous mode with a more accurate reference clock being provided (by GPS for example) and the BS is synchronized by frames and by OFDM symbols.

6. The Cellular network system according to claim 5, wherein using higher FFT sizes, the frame number is synchronized by GPS or time stamp, to achieve orthogonality between sub carriers in the BS/Sector and between different neighbors BS/sectors.

7. The Cellular network system according to claim 1, wherein including means for its operation in a Coordinated Synchronous mode wherein permutations and collisions and averaging interferences from other cells cause limitations on the use of high QAM modulations, which sometimes can increase capacity up to three times (64 QAM instead QPSK).

8. The Cellular network system according to claim 7, wherein using the same permutations for a group of BS/sectors and a sector/BS are coordinate sub channels division between them by communicate through the backbone, to increase the capacity by factor of 1.5 on the same coverage area with a probability higher than 99%.