CN106559793B - Method and system for avoiding interference in cross-carrier scheduling in isomorphic network - Google Patents

Method and system for avoiding interference in cross-carrier scheduling in isomorphic network Download PDF

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CN106559793B
CN106559793B CN201510621439.0A CN201510621439A CN106559793B CN 106559793 B CN106559793 B CN 106559793B CN 201510621439 A CN201510621439 A CN 201510621439A CN 106559793 B CN106559793 B CN 106559793B
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carrier
enb
cross
terminal
bler
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CN106559793A (en
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李路鹏
熊尚坤
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China Telecom Corp Ltd
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China Telecom Corp Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/14—Spectrum sharing arrangements between different networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H04W72/542—Allocation or scheduling criteria for wireless resources based on quality criteria using measured or perceived quality

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Quality & Reliability (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The invention discloses a method and a system for avoiding interference in cross-carrier scheduling in a homogeneous network. The method of the embodiment comprises the following steps: the terminal reports cross-carrier scheduling capability information and carrier aggregation capability information supported by the terminal to a base station eNB; after the connection of the main carrier is established, the eNB adds the auxiliary carrier according to the signal intensity of the auxiliary carrier reported by the terminal; the terminal measures the block error rate of the physical downlink control channel of the auxiliary carrier and reports BLER to an eNB; and the eNB judges whether to start cross-carrier scheduling according to the BLER. In this embodiment, a threshold value for triggering cross-carrier scheduling is set at the base station side, and the base station compares the block error rate of the physical downlink control channel of the secondary carrier reported by the terminal with the threshold value for triggering cross-carrier scheduling set by the base station to determine whether to enable cross-carrier scheduling, so that interference of the secondary carrier is avoided, and resource utilization efficiency is improved.

Description

Method and system for avoiding interference in cross-carrier scheduling in isomorphic network
Technical Field
the invention relates to the field of mobile communication, in particular to a method and a system for avoiding interference in cross-carrier scheduling in a homogeneous network.
Background
The existing network has two network types of a homogeneous network and a heterogeneous network, cross-carrier scheduling is generally applied to the heterogeneous network, and interference to a micro station is reduced by a macro station through the cross-carrier scheduling; in a Long Term Evolution (LTE) homogeneous network with multi-carrier aggregation, after discovering the capability of the terminal supporting cross-carrier scheduling according to the information reported by the terminal capability, the eNB directly starts cross-carrier scheduling, which may affect the LTE multi-carrier aggregation performance when the secondary carrier PDCCH has large interference, resulting in poor user experience.
Disclosure of Invention
The embodiment of the invention aims to solve the technical problem that: the problem of larger interference of a PDCCH (physical downlink control channel) of an auxiliary carrier in the LTE multi-carrier aggregation homogeneous network is solved.
According to an aspect of the embodiments of the present invention, a method for avoiding interference in cross-carrier scheduling in a homogeneous network is provided, which includes: the terminal reports cross-carrier scheduling capability information and carrier aggregation capability information supported by the terminal to a base station eNB; after the connection of the main carrier is established, the eNB adds the auxiliary carrier according to the signal intensity of the auxiliary carrier reported by the terminal; the terminal measures the block error rate of the physical downlink control channel of the auxiliary carrier and reports BLER to an eNB; and the eNB judges whether to start cross-carrier scheduling according to the BLER.
In one embodiment, the eNB determining whether to enable cross-carrier scheduling according to the BLER specifically includes: when BLER is less than a first threshold value, the eNB does not start a cross-carrier scheduling function; and when the first threshold value is less than the BLER and less than the second threshold value, the eNB enables a cross-carrier scheduling function.
In one embodiment, the eNB deactivates the secondary carrier when BLER > a second threshold.
In one embodiment, the enabling of the cross-carrier scheduling function by the eNB specifically includes: and the eNB sends the scheduling information of the main carrier and the auxiliary carrier to the terminal through the main carrier.
according to an aspect of the embodiments of the present invention, a system for avoiding interference in cross-carrier scheduling in a homogeneous network is provided, which includes: the terminal is used for reporting cross-carrier scheduling capability information and carrier aggregation capability information supported by the terminal to the base station eNB; measuring the block error rate of the physical downlink control channel of the auxiliary carrier, and reporting the BLER to an eNB; the eNB is used for adding the auxiliary carrier according to the signal intensity of the auxiliary carrier reported by the terminal after the connection of the main carrier is established; and judging whether cross-carrier scheduling is enabled or not according to the BLER.
In one embodiment, the eNB is specifically configured to: when the BLER is less than a first threshold value, the eNB is used for not enabling a cross-carrier scheduling function; and when the first threshold value is less than the BLER and less than the second threshold value, the eNB is used for enabling the cross-carrier scheduling function.
In one embodiment, the eNB is configured to deactivate the secondary carrier when BLER > a second threshold.
in one embodiment, when the eNB enables the cross-carrier scheduling function, the eNB is specifically configured to send scheduling information of the primary carrier and the secondary carrier to the terminal through the primary carrier.
In this embodiment, a threshold value for triggering cross-carrier scheduling is set at the base station side, and the base station compares the block error rate of the physical downlink control channel of the secondary carrier reported by the terminal with the threshold value for triggering cross-carrier scheduling set by the base station to determine whether to enable cross-carrier scheduling, so that interference of the secondary carrier is avoided, and resource utilization efficiency is improved.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a flow chart illustrating an embodiment of a method for avoiding interference in cross-carrier scheduling in a homogeneous network according to the present invention.
Fig. 2 is a flowchart illustrating a method for avoiding interference in cross-carrier scheduling in a homogeneous network according to still another embodiment of the present invention.
Fig. 3 is a schematic structural diagram illustrating an embodiment of a system for avoiding interference in cross-carrier scheduling in a homogeneous network according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
fig. 1 is a flowchart of an embodiment of a method for avoiding interference in cross-carrier scheduling in a homogeneous network according to the present invention. As shown in fig. 1, the method for avoiding interference in cross-carrier scheduling in a homogeneous network of the present invention includes:
Step S101, the terminal reports the cross-carrier scheduling capability information and the carrier aggregation capability information supported by the terminal to a base station eNB.
And step S102, after the connection of the main carrier is established, the eNB adds the auxiliary carrier to the terminal according to the signal intensity of the auxiliary carrier reported by the terminal.
Step S103, the terminal measures a Block Error rate of a physical downlink control channel of the secondary carrier, reports the Block Error rate (BLER) to the eNB, and reports the BLER to the eNB.
Step S104, the eNB judges whether to start cross-carrier scheduling according to BLER.
In this embodiment, a threshold value for triggering cross-carrier scheduling is set at the base station side, and the base station compares the block error rate of the physical downlink control channel of the secondary carrier reported by the terminal with the threshold value for triggering cross-carrier scheduling set by the base station to determine whether to enable cross-carrier scheduling, so that interference of the secondary carrier is avoided, and resource utilization efficiency is improved.
Fig. 2 is a flowchart illustrating a method for avoiding interference in cross-carrier scheduling in a homogeneous network according to still another embodiment of the present invention. As shown in fig. 2, the method for avoiding interference in cross-carrier scheduling in a homogeneous network of the present invention includes:
Step S201, the terminal reports the cross-carrier scheduling capability information and the carrier aggregation capability information supported by the terminal to the base station eNB.
Step S202, after the connection of the primary carrier is established, the eNB may add the secondary carrier according to the signal strength of the secondary carrier reported by the terminal.
Step S203, the terminal measures the block error rate of the physical downlink control channel of the secondary carrier, and reports BLER to the eNB.
step S204, the eNB judges whether cross-carrier scheduling is enabled or not according to BLER.
In an embodiment, the eNB specifically determining whether cross-carrier scheduling is enabled according to BLER may include the following steps:
When the first threshold is less than the BLER and less than the second threshold, the eNB executes step S205 to enable the cross-carrier scheduling function, wherein in an embodiment, the eNB sends scheduling information of the primary carrier and the secondary carrier to the terminal through the primary carrier, thereby implementing the cross-carrier scheduling.
When BLER < the first threshold, the eNB may perform step S206 without enabling the cross-carrier scheduling function.
When BLER > the second threshold, the eNB may execute step S207 to deactivate the secondary carrier and stop allocating the secondary carrier to the terminal.
Fig. 3 is a schematic structural diagram illustrating an embodiment of a system for avoiding interference in cross-carrier scheduling in a homogeneous network according to the present invention. Referring to fig. 3, the system for avoiding interference in cross-carrier scheduling in a homogeneous network of the present embodiment includes: terminal 301 and base station eNB 302.
the terminal 301 is configured to report cross-carrier scheduling capability information and carrier aggregation capability information supported by the terminal to the base station eNB 302. The block error rate of the physical downlink control channel of the secondary carrier is measured and the BLER is reported to the eNB 302.
And the eNB302 is configured to add the auxiliary carrier according to the signal strength of the auxiliary carrier reported by the terminal 301 after the connection of the main carrier is established. And judging whether cross-carrier scheduling is enabled or not according to the BLER.
in one embodiment, eNB302 is configured to not enable the cross-carrier scheduling function when BLER < a first threshold value; the eNB302 is further configured to enable a cross-carrier scheduling function when the first threshold value < the BLER < the second threshold value.
In one embodiment, eNB302 may also be used to deactivate the secondary carrier when BLER > a second threshold.
In one embodiment, when the eNB enables the cross-carrier scheduling function, the eNB is specifically configured to send scheduling information of the primary carrier and the secondary carrier to the terminal through the primary carrier.
It will be understood by those skilled in the art that all or part of the steps for implementing the above embodiments may be implemented by hardware, or may be implemented by a program instructing relevant hardware, where the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, etc.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (4)

1. A method for avoiding interference in cross-carrier scheduling in a homogeneous network, the method comprising:
The terminal reports cross-carrier scheduling capability information and carrier aggregation capability information supported by the terminal to a base station eNB;
After the connection of the main carrier is established, the eNB adds the auxiliary carrier according to the signal intensity of the auxiliary carrier reported by the terminal;
The terminal measures the block error rate of the physical downlink control channel of the auxiliary carrier and reports BLER to an eNB;
The eNB judges whether cross-carrier scheduling is started or not according to the BLER;
Wherein, the eNB determines whether to enable cross-carrier scheduling according to the BLER, specifically including: when the BLER is less than a first threshold value, the eNB does not start a cross-carrier scheduling function; when the first threshold value is less than the BLER and less than the second threshold value, the eNB starts a cross-carrier scheduling function; and when the BLER is larger than a second threshold value, the eNB deactivates the auxiliary carrier.
2. The method of claim 1, wherein the eNB enables a cross-carrier scheduling function, specifically comprising:
And the eNB sends the scheduling information of the main carrier and the auxiliary carrier to the terminal through the main carrier.
3. A system for avoiding interference in cross-carrier scheduling in a homogeneous network, said system comprising: terminal and base station eNB, wherein:
The terminal is used for reporting the cross-carrier scheduling capability information and the carrier aggregation capability information supported by the terminal to the base station eNB; measuring the block error rate of the physical downlink control channel of the auxiliary carrier, and reporting the BLER to an eNB;
the eNB is used for adding the auxiliary carrier according to the signal intensity of the auxiliary carrier reported by the terminal after the connection of the main carrier is established; judging whether cross-carrier scheduling is started or not according to the BLER; the eNB is specifically configured to: when the BLER is less than a first threshold value, the eNB is used for not enabling a cross-carrier scheduling function; when the first threshold value is less than the BLER and less than the second threshold value, the eNB is used for enabling a cross-carrier scheduling function; and when the BLER is larger than a second threshold value, the eNB is used for deactivating the secondary carrier.
4. the system of claim 3, wherein when the eNB enables the cross-carrier scheduling function, the eNB is specifically configured to transmit the scheduling information of the primary carrier and the secondary carrier to the terminal through the primary carrier.
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CN102685897B (en) * 2011-03-09 2017-09-26 中兴通讯股份有限公司 Sequence configuration method and device in a kind of carrier aggregation system
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US9456454B2 (en) * 2011-06-02 2016-09-27 Broadcom Corporation Flexible disabling/enabling of cross-carrier scheduling in carrier-aggregated wireless data transmission
EP2833664A4 (en) * 2012-03-26 2015-12-23 Fujitsu Ltd Method and device for solving uplink interference in heterogeneous network
CN103024919B (en) * 2012-12-03 2016-05-25 电信科学技术研究院 A kind of across carrier dispatching management method and equipment
CN103856982B (en) * 2012-12-03 2017-05-31 普天信息技术研究院有限公司 A kind of method for reducing down control channel interference
CN103476039B (en) * 2013-09-12 2016-08-17 东南大学 Time-frequency based on carrier aggregation strengthens inter-cell interference coordination method
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