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A method for generating and transmitting optimal cell (base station) identification codes in a W-CDMA mobile communication system is disclosed. In the present invention, the cell identification codes are generated using Hadamard code and bi-orthogonal code. To optimize performance in a soft handover

A method for generating and transmitting optimal cell (base station) identification codes in a W-CDMA mobile communication system is disclosed. In the present invention, the cell identification codes are generated using Hadamard code and bi-orthogonal code. To optimize performance in a soft handover mode, cell identification codes are generated based on at least one of Hadamard codes and bi-orthogonal codes and then effectively transmitted through an uplink channel. Also, considering dynamic allocation depending on the size of an active set, optimal SSDT cell identifier codes having a maximized minimum Hamming distance are generated and then effectively transmitted through the uplink channel.

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The invention claimed is: 1. A method for allocating cell ID codes in a mobile communication system of a cellular mode comprising: generating ID codes using Hadamard codes; and allocating the generated ID codes to cells which require ID codes, wherein the ID codes are generated by deleting or punct

The invention claimed is: 1. A method for allocating cell ID codes in a mobile communication system of a cellular mode comprising: generating ID codes using Hadamard codes; and allocating the generated ID codes to cells which require ID codes, wherein the ID codes are generated by deleting or puncturing at least one bit of the Hadamard codes. 2. The method of claim 1, wherein generating the ID codes either by deleting or puncturing first bit of the Hadamard codes. 3. The method of claim 1, wherein generating the ID codes either by deleting or puncturing first and second bits of the Hadamard codes. 4. The method of claim 1, wherein generating the ID codes by deleting first, second and sixth bits of the Hadamard codes. 5. The method of claim 1, further comprising: selecting Hadamard codes in which the first bit of the second half of a code has a bit value of 0; and generating the ID codes using the selected Hadamard codes. 6. The method of claim 5, wherein generating the ID codes either by deleting or puncturing first bit the Hadamard codes. 7. The method of claim 5, wherein generating the ID codes either by deleting or puncturing first and second bits of the Hadamard codes. 8. The method of claim 5, wherein generating the ID codes by deleting first, second and sixth bits of the Hadamard codes. 9. The method of claim 1, wherein the Hadamard codes have code bit lengths of either 8 or 16. 10. A method of selecting an identification code of a primary cell by a user equipment, comprising: selecting the primary cell among a plurality of cells based on a measurement of common pilot signals received from the cells; and selecting the identification code from one of modified Hadamard codes, wherein each modified Hadamard code comprises a Hadamard code where at least one bit is not used or has been deleted. 11. The method of claim 10, wherein the identification code of the primary cell is selected from one of the following: Identification Identification code label "long" a 000000000000000 b 101010101010101 c 011001100110011 d 110011001100110 e 000111100001111 f 101101001011010 g 011110000111100 h 110100101101001. 12. The method of claim 10, wherein the identification code of the primary cell is selected from one of the following: Identification Identification label code "short" A 00000 B 01001 c 11011 d 10010 e 00111 f 01110 g 11100 h 10101. 13. The method of claim 10, wherein the identification code of the primary cell is selected from one of the following: Identification Identification label code "short" a 000 000 b 000 111 c 101 101 d 101 010 e 011 011 f 011 100 g 110 110 h 110 001. 14. The method of claim 10 or 11, wherein the first bit of each Hadamard code is not used or has been deleted to form the modified Hadamard codes. 15. The method of claim 14, wherein the each Hadamard code comprises 16 bits, and deletion is performed by puncturing. 16. The method of claims 10, wherein the first bit and at least one other bit of each Hadamard code are not used or have been deleted to form the modified Hadamard codes. 17. The method of claim 16, wherein the at least one other bit is the second and sixth bits. 18. The method of claim 17, wherein each Hadamard code is 8 bits, and deletion is performed by puncturing. 19. The method of claim 16, wherein the at least one other bit is a second bit of each Hadamard code. 20. The method of claim 19, wherein each Hadamard code is 8 bits, and deletion is performed by puncturing. 21. The method of claim 10, 11, or 12 wherein the selected identification code bits are transmitted within a radio frame structure. 22. The method of claim 21, wherein the radio frame structure comprises 15 slots, and the corresponding selected identification code bit is provided in a 1 bit feedback identifier (FBI) field of the slot. 23. The method of claim 10 or 13, wherein the selected identification code bits are transmitted within a radio frame structure, which comprises 15 slots, the corresponding selected identification code bits are provided in a 2 bit feedback identifier (FBI) field of the slot. 24. The method of claim 10, wherein a user equipment (UE) periodically sends the selected identification code of the primary cell via a portion of an uplink feedback indicator (FBI) field. 25. A method of sending an identification code of a primary cell by a user equipment, comprising: selecting the primary cell among a plurality of cells based on a measurement of common pilot signals received from the cells; selecting the identification code from one of a plurality of codes, wherein each identification code comprises a binary bit sequence, and a first bit of each binary bit sequence has a binary value of "0"; and sending the identification code after the first bit is punctured. 26. The method of claim 25, wherein the identification code of the primary cell is selected from one of the following: Identification Identification label code "medium" a (0)0000000 b (0)1010101 c (0)0110011 d (0)1100110 e (0)0001111 f (0)1011010 g (0)0111100 h (0)1101001 and the binary bit in brackets is the first bit that is punctured. 27. The method of claim 25, wherein the identification code of the primary cell is selected from one of the following: Identification Identification code label "long" a (0)0000000 (0)0000000 b (0)0000000 (1)1111111 c (0)1010101 (0)1010101 d (0)1010101 (1)0101010 e (0)0110011 (0)0110011 f (0)0110011 (1)1001100 g (0)1100110 (0)1100110 h (0)1100110 (1)0011001 and the binary bits in brackets are the first bit that is punctured and at least one other bit that is punctured. 28. The method of claim 25, wherein the identification code of the primary cell is selected from one of the following: Identification Identification label code "medium" a (0)000 (0)000 b (0)000 (1)111 c (0)101 (0)101 d (0)101 (1)010 e (0)011 (0)011 f (0)011 (1)100 g (0)110 (0)110 h (0)110 (1)001 and the binary bits in brackets are the first bit that is punctured and at least one other bit that is punctured. 29. The method of claim 25 or 26 wherein the selected identification code bits are transmitted within a radio frame structure. 30. The method of claim 29, therein the radio frame structure comprises 15 slots, and the corresponding selected identification code bit is provided in a 1 bit feedback identifier (FBI) field of the slot. 31. The method of claim 25, 27 or 28, wherein the selected identification code bits are transmitted within a radio frame structure, which comprises 15 slots, the corresponding selected identification code bits are provided in a 2 bit feedback identifier (FBI) field of the slot. 32. The method of claim 25, wherein a user equipment (UE) periodically sends the selected identification code of the primary cell via a portion of an uplink feedback indicator (FBI) field. 33. The method of claim 25, 26, 27, or 28, wherein the each of the plurality codes comprises Hadamard code of 16 bits or 8 bits. 34. A method of sending an identification code of a primary cell by a user equipment, comprising: selecting the primary cell among a plurality of cells based on a measurement of common pilot signals received from the cells; selecting the identification code from one of Hadamard codes; and sending the identification code after at least one bit is punctured. 35. The method of claim 34, wherein the identification code of the primary cell is selected from one of the following: Identification Identification label code "medium" a (0)0000000 b (0)1010101 c (0)0110011 d (0)1100110 e (0)0001111 f (0)1011010 g (0)0111100 h (0)1101001 and the binary bit in brackets is the first bit that is punctured. 36. The method of claim 34, wherein the identification code of the primary cell is selected from one of the following: Identification Identification code label "long" A (0)0000000 (0)0000000 B (0)0000000 (1)1111111 C (0)1010101 (0)1010101 D (0)1010101 (1)0101010 E (0)0110011 (0)0110011 f (0)0110011 (1)1001100 g (0)1100110 (0)1100110 h (0)1100110 (1)0011001 and the binary bits in brackets are the first bit that is punctured and at least one other bit that is punctured. 37. The method of claim 34, wherein the identification code of the primary cell is selected from one of the following: Identification Identification label code "medium" a (0)000 (0)000 b (0)000 (1)111 c (0)101 (0)101 d (0)101 (1)010 e (0)011 (0)011 f (0)011 (1)100 g (0)110 (0)110 h (0)110 (1)001 and the binary bits in brackets are the first bit that is punctured and at least one other bit that is punctured. 38. The method of claim 34 or 35 wherein the selected identification code bits are transmitted within a radio frame structure. 39. The method of claim 38, wherein the radio frame structure comprises 15 slots, and the corresponding selected identification code bit is provided in a 1 bit feedback identifier (FBI) field of the slot. 40. The method of claim 34, 36 or 37, wherein the selected identification code bits are transmitted within a radio frame structure, which comprises 15 slots, the corresponding selected identification code bits are provided in a 2 bit feedback identifier (FBI) field of the slot. 41. The method claim 34, wherein a user equipment (UE) periodically sends the selected identification code of the primary cell via a portion of an uplink feedback indicator (FBI) field. 42. A method of sending an identification code of a primary cell by a user equipment, comprising: selecting the primary cell among a plurality of cells based on a measurement of common pilot signals received from the cells; selecting the identification code of the primary cell from one of the following: Identification Identification code label "long" a 000000000000000 b 101010101010101 c 011001100110011 d 110011001100110 e 000111100001111 f 101101001011010 g 011110000111100 h 110100101101001 and sending the selected identification code. 43. A method of sending an identification code of a primary cell by a user equipment, comprising: selecting the primary cell among a plurality of cells based on a measurement of common pilot signals received from the cells; selecting the identification code of the primary cell from one of the following: Identification Identification label code "medium" A (0)0000000 B (0)1010101 C (0)0110011 d (0)1100110 e (0)0001111 f (0)1011010 g (0)0111100 h (0)1101001 and sending the selected identification code after at least one bit indicated by brackets is punctured. 44. A method of sending an identification code of a primary cell by a user equipment, comprising: selecting the primary cell among a plurality of cells based on a measurement of common pilot signals received from the cells; selecting the identification code of the primary cell from one of the following: Identification Identification label code "short" a 00000 b 01001 c 11011 d 10010 e 00111 f 01110 g 11100 h 10101 and sending the selected identification code. 45. A method of sending an identification code of a primary cell by a user equipment, comprising: selecting the primary cell among a plurality of cells based on a measurement of common pilot signals received from the cells; selecting the identification code of the primary cell from one of the following: Identification Identification code label "long" a (0)0000000 (0)0000000 b (0)0000000 (1)1111111 c (0)1010101 (0)1010101 d (0)1010101 (1)0101010 e (0)0110011 (0)0110011 f (0)0110011 (1)1001100 g (0)1100110 (0)1100110 h (0)1100110 (1)0011001 and sending the selected identification code after at least one bit indicated by brackets is punctured. 46. A method of sending an identification code of a primary cell by a user equipment, comprising: selecting the primary cell among a plurality of cells based on a measurement of common pilot signals received from the cells; selecting the identification code of the primary cell from one of the following: Identification Identification label code "medium" a (0)000 (0)000 b (0)000 (1)111 c (0)101 (0)101 d (0)101 (1)010 e (0)011 (0)011 f (0)011 (1)100 g (0)110 (0)110 h (0)110 (1)001 and sending the selected identification code after at least one bit indicated by brackets is punctured. 47. A method of sending an identification code of a primary cell by a user equipment, comprising: selecting the primary cell among a plurality of cells based on a measurement of common pilot signals received from the cells; selecting the identification code of the primary cell from one of the following: Identification Identification label code "short" a 000 000 b 000 111 c 101 101 d 101 010 e 011 011 f 011 100 g 110 110 h 110 001 and sending the selected identification code. 48. The method of claim 42, 43, or 44, wherein the selected identification code bits are transmitted within a radio frame structure, which comprises 15 slots, and the corresponding selected identification code bit is provided in a 1 bit feedback identifier (FBI) field of the slot. 49. The method of claim 45, 46, or 47, wherein the selected identification code bits are transmitted within a radio frame structure, which comprises 15 slots and the corresponding selected identification code bits are provided in a 2 bit feedback identifier (FBI) field of the slot.