초록 ▼

An access radio port is provided that spreads a payload data signal, extracted from an ATM packet, with a uniquely assigned orthogonal code, transmits the spread payload data signal to one of a group of mobile subscriber terminals located within a microport cell of a wireless terrestrial network, an

An access radio port is provided that spreads a payload data signal, extracted from an ATM packet, with a uniquely assigned orthogonal code, transmits the spread payload data signal to one of a group of mobile subscriber terminals located within a microport cell of a wireless terrestrial network, and releases the uniquely assigned orthogonal code. In another aspect, a mobile subscriber terminal, is located within a microport cell of a terrestrial wireless network that interfaces with an access radio port. The mobile subscriber terminal receives an assignment of a unique orthogonal code, spreads a payload data signal using the unique orthogonal code, modulates and forwards the spread payload data signal to the access radio port, and releases the assignment of the unique orthogonal code.

대표청구항 ▼

1. 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 BSj, wishe

1. 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 BSj, wishes to send payload information to the base station BSj, the terminal A sending to the base station BSj 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 gj that is allocated to the base station BSj to distinguish transmissions to the base station BSj from transmissions to neighboring base stations;the terminal A receiving from the base station BSj an acknowledgment message in response to the sent access request message, said acknowledgment message containing information about an orthogonal code ωa that belongs to a family of orthogonal codes ωm, m=1, 2, . . . , M, where M is a predetermined integer and where the orthogonal code ωa (a) is assigned by the base station BSj to the terminal A(b) is assigned by the base station BSj to no other terminal at the time of the assigning to the terminal A, and(c) is different from orthogonal code ωj, which is reserved by the base station BSj for paging messages; andfollowing receipt of said acknowledgement message, the terminal A sending to the base station BSj a payload message that contains said payload information, which is spread with the pseudo-random code gj and with the orthogonal code ωa. 2. The method of claim 1 further comprising the terminal A: monitoring for receipt of a paging message from the base station BSj to said terminal A, which is spread with said orthogonal code ωj; andif the paging message is received that specifies an orthogonal code ωb to be used by the terminal A, replacing said orthogonal code ωa with said orthogonal code ωb. 3. The method according to claim 1, wherein the payload information comprises a plurality of packets followed by a flag to indicate end of said payload message. 4. The method of claim 1 wherein said access request message is sent using a Spread Spectrum Random Access (SSRA) protocol. 5. The method of claim 3 further comprising, at said base station BSj: receiving the payload message;despreading the received payload message with the pseudo-random gj and the code ωa to recover said plurality of packets contained in the payload message; andapplying the recovered packets to the core network. 6. The method of claim 1 further comprising: the terminal A resending the access request message when the terminal A fails to receive said acknowledgement message within a predetermined time interval following the sending of said access request message. 7. The method of claim 1 further comprising at said base station BSj: receiving one or more packets that are destined for said terminal A;in response to said receiving, sending a paging message to said terminal A, spread with the orthogonal code ωj;receiving an acknowledgement to said paging message from said terminal A;sending a payload message to said terminal A, which contains said one or more packets, spread with orthogonal code ωc that was previously sent to said terminal A, where the orthogonal code ωc is constrained to be different from the orthogonal code ωj but is not constrained to be different from the orthogonal code ωa; andin absence of a negative acknowledgement from the terminal A within a preselected time-out period, the base station BSj releasing the orthogonal code ωc for assignment of the orthogonal code ωc by the base station BSj to any other terminal in said cell. 8. The method of claim 7 where said paging message specifies said orthogonal code ωc. 9. The method of claim 1 further comprising said terminal A: marking time when said terminal A sends the access request message; andemploying the marked time and timing information contained in the acknowledgement message to send the payload message synchronously. 10. An arrangement comprising: base stations BSk, k=1, 2, . . . N, where N is an integer, each providing service to user terminals situated within respective cells of the base stations; a packet core network; andone or more access nodes for interconnecting the base stations to the core network;where communication from BSj employs a channel that is characterized by paging messages that are spread by a preselected code ωj that belongs to a family of orthogonal codes ωm, m=1, 2, . . . , M, where M is a predetermined integer, and data traffic messages that are spread by other codes from said family of orthogonal codes ωm that are assigned to different ones of said user terminals; andwhere communication to BSj from a terminal A employs a contention channel for sending access requests to BSj, spread with pseudo-random code gj that distinguishes transmissions to BSj from transmissions to other ones of said base stations, and data traffic messages that are spread with a code ωa from said family of orthogonal codes that is assigned to terminal A, where code ωa is different from a code ωj, and further spread by said code gj. 11. The arrangement of claim 10 where said data traffic messages that are sent to BSj are sent in synchronism with a timing signal, in a non-contention manner.