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Downlink interference coordinating method and base stations

An interference coordination and base station technology, applied in the field of communications, can solve problems such as reducing system resource utilization, affecting interference coordination performance, etc., and achieves the effect of high interference coordination performance and optimized configuration

Inactive Publication Date: 2015-04-29
POTEVIO INFORMATION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The existing downlink enhanced interference coordination scheme in the heterogeneous network scenario is mainly a static scheme. When the interference coordination function is enabled, the ABS mode configuration is performed through the X2 interface, and the pre-configured ABS mode has been used since then, regardless of the macro cell Or the load change of the pico cell to adjust the ABS configuration mode, which will affect the performance of interference coordination and reduce the utilization of system resources

Method used

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  • Downlink interference coordinating method and base stations

Examples

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Embodiment 1

[0079] Embodiment 1 of the present invention proposes a method for realizing dynamic downlink interference coordination in a pico cell base station, see figure 1 , the method includes:

[0080] Step 101: Divide the ABS modes corresponding to each uplink-downlink subframe ratio into multiple levels from low to high.

[0081] Step 102: The pico cell base station periodically obtains the load evaluation indication of the pico cell.

[0082] Step 103: The pico cell base station determines the required level of ABS mode according to the load evaluation indication, and reports to the macro cell base station;

[0083] Step 104: The pico cell base station configures the ABS mode used in this period according to the received instruction from the macro cell base station.

[0084] according to figure 1 It can be seen from the flow shown that Embodiment 1 of the present invention proposes a dynamic downlink interference coordination scheme. The pico cell base station determines the req...

Embodiment 2

[0089] Embodiment 2 proposes a method for realizing dynamic downlink interference coordination in a macro cell base station, see figure 2 , the method includes:

[0090] Step 201: Divide the ABS pattern corresponding to each uplink-downlink subframe ratio into a plurality of levels from low to high, wherein the number of ABS subframes in the low-level ABS mode is less than that in the high-level ABS mode.

[0091] Step 202: The macro cell base station periodically acquires a load evaluation indication of the macro cell.

[0092] Step 203: The macro cell base station determines the ABS mode used in this period according to the load evaluation indication of the macro cell and the required level of ABS mode reported by the pico cell base station.

[0093] Step 204: The macro cell base station indicates the ABS mode used in this period to the pico cell base station.

[0094] in the above figure 2 In the flow shown, the macro cell base station finally determines the ABS mode u...

Embodiment 3

[0113] This embodiment takes the process of coordinating between a pico cell base station and a macro cell to realize dynamic downlink interference coordination as an example, and describes a better coordinating process of the two in detail. image 3 ,include:

[0114] Step 301: Determine the ABS period and all available ABS patterns in advance according to the current uplink and downlink subframe configuration adopted by the current LTE / LTE-A system.

[0115] Step 302: Divide the ABS patterns corresponding to the current uplink-downlink subframe ratio into multiple levels from low to high, and the number of ABS subframes in the low-level ABS modes is less than that in the high-level ABS modes.

[0116] For example, the currently used uplink and downlink subframe ratio is uplink and downlink subframe ratio 1. According to the process from step 301 to step 302 above, the available ABS mode and level settings are shown in Table 1 below: In Table 1, "1 " means configured as ABS...

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Abstract

The invention provides a downlink interference coordinating method and base stations. Following processing is performed in a macro cell base station: dividing ABS modes matched with and corresponding to each uplink subframe and each downlink subframe into multiple levels from a low level to a high level, wherein the number of ABS subframes in the low-level ABS mode is smaller than that in the high-level ABS mode; periodically acquiring a macro cell load on assessing instruction by the macro cell base station, determining the ABS mode used in the period according to the macro cell load on assessing instruction as well as a required-level ABS mode reported by a picocell base station, and indicating to the picocell base station. By the downlink interference coordinating method, dynamic interference coordination can be carried out.

Description

technical field [0001] The invention relates to communication technology, in particular to a downlink interference coordination method and a base station. Background technique [0002] In order to solve the problem of unbalanced load among cross-layer cells in heterogeneous networks and improve the utilization rate of system resources, the LTE-A system introduces Cell Range Expansion (CRE, Cell Range Expansion) technology, that is, the reference signal received power ( RSRP) is added with an offset, so that users in the macro cell close to the pico cell choose to access the pico cell. Since the serving cell of the UE in the CRE area is not the cell with the strongest signal, the UE often suffers severe downlink interference from the macro cell. [0003] In order to solve this problem, LTE-A proposes a downlink enhanced interference coordination method based on time domain resource coordination. Almost Blank Subframe (ABS) is defined, the interfering source cell does not pe...

Claims

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Application Information

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IPC IPC(8): H04W16/04H04W16/32
CPCH04W16/04H04W16/32
Inventor 李维娜
Owner POTEVIO INFORMATION TECH
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