Patent ID: 8532067

Claim:
In an arrangement that includes a plurality of base stations, which base stations are interconnected via one or more access nodes to a core network, a method comprising the steps: when a terminal A that is located in a cell that is associated with one of the base stations, base station BS j , wishes to send payload information to the base station BS j , the terminal A sending to the base station BS j an access request message that includes a preamble field and a header field that identifies the terminal A, where said message is spread with a pseudo-random code g j that is allocated to the base station BS j to distinguish transmissions to the base station BS j from transmissions to neighboring base stations; the terminal A receiving from the base station BS j an acknowledgment message in response to the sent access request message, said acknowledgment message containing information about an orthogonal code ω a that belongs to a family of orthogonal codes ω m , m=1, 2, . . . , M, where M is a predetermined integer and where the orthogonal code ω a (a) is assigned by the base station BS j to the terminal A (b) is assigned by the base station BS j to no other terminal at the time of the assigning to the terminal A, and (c) is different from orthogonal code ω j , which is reserved by the base station BS j for paging messages; and following receipt of said acknowledgement message, the terminal A sending to the base station BS j a payload message that contains said payload information, which is spread with the pseudo-random code g j and with the orthogonal code ω a .