Method and apparatus for dynamic spectrum management

An apparatus for dynamic spectrum management, comprising at least a processor executing program codes stored in a memory, which configure the apparatus to:

• determine a reusable spectrum for one of multiple cell links in a network according to co-frequency indication information, wherein the co-frequency indication information is used to indicate reusable levels of spectrums of other cell links for each cell link in the multiple cell links;
• and
• update a spectrum configuration of the one of the multiple cell links by using the reusable spectrum of the one of the multiple cell links;
• wherein the co-frequency indication information comprises a co-frequency indication matrix, and the apparatus is further configured to:
• obtain a link state of each cell link in the multiple cell links, propagation attenuation parameters, and a topology of the network;
• and
• generate or update the co-frequency indication matrix according to the link state of each cell link in the multiple cell links, the propagation attenuation parameters, and the topology of the network;
• wherein:
• each element of the co-frequency indication matrix indicates a reusable level of a spectrum of another cell link for one cell link in the multiple cell links;
• wherein:
• the link state comprises:
• the load of the cell link, interference strength, and transmit power of a base station of the cell link;
• the reusable level of the spectrum of the other cell link for the one cell link in the multiple cell links comprises:
• a level of a load change before and after the spectrum of the other cell link is reused by the one cell link;
• and
• the apparatus is further configured to:
• determine a spectrum of a cell link at a highest level of a load change before and after the spectrum is reused by the one of the multiple cell links, as the reusable spectrum for the one of the multiple cell links;
• wherein:
• the load after the spectrum of the spectrum of the other cell link is reused by the one cell link is indicated by the following formula:
• L
• _
• j
• ′
• ≅
• (
• 1
• L
• _
• j
• -
• 1
• T
• _
• j
• ·
• BW
• tot
• ·
• log
• ⁡
• (
• I
• _
• j
• ×
• BW
• tot
• +
• I
• ⋒
• ij
• I
• _
• j
• ×
• BW
• tot
• )
• )
• -
• 1
• where the one cell link is cell link i, the other cell link is cell link j, Lj indicates the load before the spectrum of cell link j is reused by cell link i, BWtot is a total bandwidth owned by cell link j, Īj is interference strength of the spectrum of cell link j, indicates strength of co-frequency interference caused by cell link i to cell link j if cell link i reuses the spectrum of cell link j, is obtained according to transmit power of a base station of cell link i and propagation attenuation parameters, and Tj indicates average throughput of cell link j.

A method for dynamic spectrum management of an apparatus which comprises at least a processor executing program codes stored in a memory, which configure the apparatus to perform functions, comprising:

• determining, by an apparatus, a reusable spectrum for one of multiple cell links in a network according to co-frequency indication information, wherein the co-frequency indication information is used to indicate reusable levels of spectrums of other cell links for each cell link in the multiple cell links;
• and
• updating, by the processor, a spectrum configuration of the one of the multiple cell links by using the reusable spectrum of the one of the multiple cell links;
• wherein the co-frequency indication information comprises a co-frequency indication matrix, and the method further comprises:
• obtaining, by the processor, a link state of each cell link in the multiple cell links, propagation attenuation parameters, and a topology of the network;
• and
• generating or updating, by the processor, the co-frequency indication matrix according to the link state of each cell link in the multiple cell links, the propagation attenuation parameters, and the topology of the network;
• wherein:
• each element of the co-frequency indication matrix indicates a reusable level of a spectrum of another cell link for one cell link in the multiple cell links;
• wherein the determining, by the processor, the reusable spectrum for the one of the multiple cell links in the network according to the co-frequency indication information comprises:
• searching, by the processor, the co-frequency indication matrix for a reusable spectrum for the one of the multiple cell links according to the reusable levels of the spectrums of the other cell links in the network for the one of the multiple cell links;
• further comprising:
• counting, by the processor, the number of times of failing to find a reusable spectrum for at least one of the multiple cell links;
• and
• determining, by the processor, whether the number of times exceeds a fifth threshold;
• and
• indicating, by the processor, re-planning of spectrums of the network if the number of times exceeds the fifth threshold.