[0038] Embodiment 2
[0039] In the embodiment of the present invention, ICIC is performed by counting the number of users of each priority in the cell using the interfering PRB and the proportion of the number of users with the priority configured by the network management or the algorithm of the eNB.
[0040] like image 3 Shown is a schematic flowchart of Embodiment 2 of the present invention.
[0041] Step 301: eNB1 and eNB2 exchange a list of interfering PRBs;
[0042] The list shown in Table 2 includes parameters such as the priority of users in the cell that uses the interfering PRB, and the number of users belonging to each user priority added in eNB1. In the table, "M" indicates that the corresponding parameter is required, and "O" indicates that the corresponding parameter is optional.
[0043] Table 2
[0044] Cell ID (Cell ID) M PRB list (PRBlist) M PRB ID (PRB ID) M use the cell properties of the interfering PRB O Cell priority using interfering PRBs O User level list
[0045] PRB ID: eNB2 knows which PRB has interfered according to the information element (Information Element, IE).
[0046] Attribute of cell using interfering PRB: This IE specifies whether the cell using the interfering PRB is a cell pre-assigned to use the interfering PRB. The IE can decide who has priority according to a certain policy of the operator. For example, cells pre-allocated using interfering PRBs are assigned a higher priority. If eNB2 receives the interfering PRB list of eNB1, the value of this IE indicates that the cell of eNB1 is pre-allocated to use the interfering PRB, but the cell of eNB2 is not pre-allocated to use the interfering PRB, then eNB2 will re-allocate the interfering PRB and no longer use the interfering PRB. This interferes with the PRB, or reduces the transmit power by itself.
[0047] Priority of the cell using the resource: It can be decided based on a certain policy of the operator who has priority. If eNB2 receives the IE value in the interfering PRB list of eNB1 with a higher priority than the cell using the interfering PRB in eNB2, then eNB2 reassigns the PRB, that is, does not use the interfering PRB, or reduces the transmit power by itself.
[0048] User level list: including the user priority of the user using the interfering PRB, and the number of users corresponding to the service level.
[0049] Step 302: eNB2 according to the parameter eNB1 the number of users of each priority in the cell using the interfering PRB, and the ratio of the number of users with priorities configured by the network management or specified by the algorithm of the eNB to the total number of users using the interfering PRB. The ratio is used as a new parameter, and different weights are assigned to each parameter. Finally, eNB2 calculates the priority judgment value, and decides whether to use the interfering PRB preferentially according to the priority judgment value, and executes the preset operation, that is, If its own priority judgment value is higher, it will continue to use the interference PRB; if its own priority judgment value is lower, it will reallocate resource blocks, that is, it will not use the interference PRB, or reduce its transmit power.
[0050] In this embodiment, the weight assigned by the system to each parameter is not limited, and those skilled in the art can set it according to actual needs.
[0051] In the present invention, by adding parameters such as IE: user priority, the number of users belonging to each user priority, etc., the eNB can perform ICIC according to more parameters, so that the ICIC is more fair and reasonable, frequent ICIC is avoided, and resource utilization is improved. , to expand the capacity of the entire system and improve system performance.
[0052] At the same time, the parameters added in Embodiment 1 and Embodiment 2 can also be comprehensively considered, and these parameters can be arranged and combined, that is, some parameters in Embodiment 1 and Embodiment 2 can be considered at the same time. For example, the "user information priority" in the embodiment 2 and the "service QoS attribute" in the embodiment 1, the "priority of the nature of the cell using the interfering PRB" and the like are considered together. Different weights are assigned to various parameters, and finally the judgment value is comprehensively calculated, and the cell of the eNB with the higher priority judgment value preferentially uses the interfering PRB.
[0053] The following are some methods of parameter selection:
[0054] table 3
[0055] Cell ID (Cell ID) M PRB list M PRB ID (PRB ID) M use the cell properties of the interfering PRB O Cell priority using interfering PRBs O Business QOS list
[0056] Table 4
[0057] Cell ID (CellID) M PRB list (PRBlist) M
[0058] PRB ID (PRBID) M use the cell properties of that resource O Cell priority using that resource O of the nature of the cell using interfering PRBs
[0059] table 5
[0060] Cell ID (Cell ID) M PRB list M PRB ID (PRB ID) M use the cell properties of the interfering PRB O Cell priority using interfering PRBs O Priority list of usage purposes of PRBs
[0061] Table 6
[0062] Cell ID (Cell ID) M PRB list M
[0063] PRB ID (PRB ID) M use the cell properties of the interfering PRB O Cell priority using interfering PRBs O Number of users
[0064] Table 7
[0065] Cell ID (Cell ID) M PRB list M PRB ID (PRB ID) M use the cell properties of the interfering PRB O Cell priority using interfering PRBs O Prioritize the use of the frequency band where the interfering PRB is located
[0066] The function of each parameter in Table 3, Table 4, Table 5 and Table 6 is the same as that of the corresponding same parameter in Example 1 and Example 2.
[0067] The above-mentioned embodiments describe the case where PRB interference occurs between two neighboring eNBs. The same method can be used for the interference situation where two or more neighboring eNBs use the same PRB at the same time. Each eNB exchanges a list of interfering PRBs with neighboring eNBs on the X2 interface. After the eNB receives the list of interfering PRBs sent by the neighboring eNBs, it performs judgment according to the parameters in the table. Here, each eNB that receives the list of interfering PRBs performs the same judgment, and the judgment method is as described in the above embodiments. In this way, each eNB knows its own interference situation and the interference situation of neighboring eNBs at the same time, and finally makes a judgment according to the priority judgment value. As long as its own priority decision value is lower than that of any other eNB, it will reallocate resource blocks, that is, no longer use the interfering PRB, or reduce its transmit power. If its own priority decision value is the highest, it continues to use the interfering PRB.
