Method for distributing spectral bandwidth of OFDM and OFDMA coexisting system

Method for distributing spectral bandwidth of OFDM and OFDMA coexisting system

  • CN 101,015,150 B
  • Filed: 10/09/2004
  • Issued: 04/16/2014
  • Est. Priority Date: 10/09/2004
  • Status: Active Grant
First Claim
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1. the spectral bandwidth distribution method of an OFDM and OFDMA symbiotic system, in this symbiotic system, include base station system, it is characterized in that, by this base station system, according to time division way combination, include up, the downlink data of OFDM subframe and OFDMA subframe, structure is realized the frame structure that OFDM and OFDMA coexist, and requires and the service condition of frequency range is distributed frequency spectrum according to the different bandwidth of OFDM and OFDMA;

  • Wherein, described bandwidth requirement comprises with service condition;

    OFDM is identical with the total frequency range of OFDMA, and bandwidth differs larger;

    Wherein, when the total frequency range of OFDM and OFDMA is identical, and bandwidth is while differing larger, the step that its spectral bandwidth distribution method one of can comprise in following (1)~

    (4);

    (1) base station system is divided into descending sub frame and sub-frame of uplink two parts by the Frame on whole frequency band on time shaft;

    Base station system is divided into downlink OFDMA subframe and two parts of descending OFDM subframe by descending sub frame according to the time, is respectively used to send OFDMA downlink data and OFDM downlink data;

    For the region that sends OFDMA downlink data, according to networking, need to send an OFDMA descending sub frame;

    For the region that sends OFDM downlink data, according to frequency domain, be divided into multiple sub-bands, send an OFDM descending sub frame in every sub-frequency bands, the data in different frequency bands send in different sectors;

    Base station system is divided into sub-frame of uplink upgoing O FDMA subframe and two parts of upgoing O FDM subframe on time shaft, is respectively used to send OFDMA upstream data and sends OFDM upstream data;

    For the region that sends OFDMA upstream data, according to networking, need to send an OFDMA sub-frame of uplink;

    For the region that sends OFDM upstream data, according to frequency domain, be divided into multiple sub-bands, send an OFDM sub-frame of uplink in every sub-frequency bands, the data in different frequency bands send in different sectors;

    (2) base station system is divided into OFDMA subframe and OFDM subframe two parts by the Frame on whole frequency band on time shaft;

    Base station system is divided into downlink OFDMA subframe and upgoing O FDMA subframe by OFDMA subframe according to the time;

    Base station system is divided into multiple sub-bands by OFDM subframe according to frequency domain, sends an OFDM descending sub frame and sub-frame of uplink in every sub-frequency bands, and the data in different frequency bands send in different sectors;

    (3) base station system is divided into two parts by the Frame on whole frequency band according to the time, and a part is descending sub frame, and another part is sub-frame of uplink;

    Base station system is divided into two frequency sub-band by descending sub frame according to frequency domain, first frequency sub-band is used for sending OFDMA descending sub frame, on second frequency sub-band, OFDMA descending sub frame and OFDM descending sub frame combine according to the mode of time-division, and two parts only take respectively the part-time of descending sub frame;

    Base station system is divided into two frequency sub-band by sub-frame of uplink according to frequency domain, first frequency sub-band is used for sending OFDMA sub-frame of uplink, on second frequency sub-band, OFDMA sub-frame of uplink and OFDM sub-frame of uplink combine according to the mode of time-division, and two parts only take respectively the part-time of sub-frame of uplink;

    (4) base station system is divided into downlink OFDMA subframe and upgoing O FDMA subframe two parts by the Frame on whole frequency band on time shaft, being respectively used to OFDMA downlink data sends, a part sends for OFDMA upstream data, and wherein this downlink OFDMA subframe also comprises an OFDMA prefix area;

    The order that base station system is distributed by frequency in the downlink data district of the non-prefix of OFDMA marks off one section of region for launching OFDM descending sub frame;

    The order that base station system is distributed by frequency in OFDMA upstream data district marks off one section of region for sending OFDM sub-frame of uplink.

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