WO2011116646A1

WO2011116646A1 - Method and device for scheduling wireless resources

Info

Publication number: WO2011116646A1
Application number: PCT/CN2011/071059
Authority: WO
Inventors: 时洁; 蔺波; 余政
Original assignee: 华为技术有限公司
Priority date: 2010-03-23
Filing date: 2011-02-17
Publication date: 2011-09-29
Also published as: CN102202404A; CN102202404B

Abstract

A method and device for scheduling wireless resources are provided, which belong to the communication technology field. The method includes: a micro base station provides interference related information to a resource scheduling device, and the interference related information comprises the location information of the micro base station; the micro base station acquires the information of wireless resources distributed by the resource scheduling device, and the wireless resources are distributed to the micro base station based on the interference related information by the resource scheduling device; the micro base station uses the wireless resources to provide service for user devices. By using above technical solution, the instances of interference occur among micro base stations or between a micro base station and a macro base station will be reduced.

Description

Radio resource scheduling method and device

The present application claims priority to Chinese Patent Application No. 201010134363.6, entitled "A Radio Resource Scheduling Method and Apparatus", filed on March 23, 2010, the entire contents of in.

Technical field

The present invention relates to the field of communications technologies, and in particular, to a radio resource scheduling method and device.

Background technique

Generally, a macro base station and a small base station are included in a heterogeneous network based on a traditional cellular network, and LTE is used.

For example, a Long Term Evolution (Long Term Evolution) network can be used to place various small base stations such as Pico (a type of small base station) and HeNB (Home) under the coverage of a Macro eNB (eNodeB, evolved base station, referred to as a base station). eNB, home base station), Femto (a type of small base station) and other wireless access points. These small base stations can access the wireless communication network or the Internet (internet) network through wired (such as optical fiber), and the wired network access capacity is large, and is not affected by the lack of wireless resources. Therefore, these small base stations have high throughput. the amount. After accessing the coverage of these small base stations, the UE (User Equipment) accessing the macro eNB accesses the small base station in a wireless manner if the UE has the right to access the small base station. A schematic diagram of a home base station network architecture in the prior art is shown in FIG. 1. The HeNB or the Macro eNB can be directly connected to an MME (Mobility Management Entity) in a wired manner (S1 interface), and related information storage of the HeNB. In the MME, multiple HeNBs access the HeNBGW (HeNB Gate Way) in a wired manner, and then the HeNBGW accesses the MME. The authentication process of the UEs of the HeNB and the initial allocation process of the radio resources are all completed by the MME and the HeNBGW.

Under the macro cell covered by the traditional Macro eNB, because of the introduction of other small base stations, many micro cells, even pico cells, are added, and the fission of the cell increases the probability of repeated use of radio resources and may cause interference. 2 is a schematic diagram of cell splitting in a macro cell, where a macro cell includes multiple home base stations, and FIG. 2 is represented by HeNB A, HeNB B, and HeNB C, and each home The base station can establish a micro cell. Among the five user equipments, UE1 and UE4 directly receive the service of the macro eNB, while UE3, UE2 and UE5 are served by the HeNB. When the microcells A and B have a long coverage distance and a low transmission power, even if two cells use the same frequency resource fl, no interference occurs between them. However, if the UE2 link quality of HeNB A deteriorates, HeNB A increases its transmit power, resulting in an increase in the coverage of HeNB A, which is likely to affect the channel quality of its neighboring HeNB B. For HeNBs using the same frequency resource fl The UE of B generates interference. On the other hand, although the mobility of the HeNB is worse than that of the UE, there is a phenomenon of moving. If the HeNB A moves to the vicinity of the HeNB B, the two wireless networks also interfere with each other because the same radio resource fl is used. Therefore, how to properly allocate radio resources to each HeNB and alleviate mutual interference between HeNBs with similar space becomes a problem.

Summary of the invention

Embodiments of the present invention provide a radio resource scheduling method and device to mitigate interference that may occur between different small base stations or small base stations and macro base stations.

According to an embodiment of the invention, a radio resource scheduling method is provided, including:

The small base station provides interference related information to the resource scheduling device, where the interference related information includes location information of the small base station;

The small base station acquires information about the radio resource allocated by the resource scheduling device, where the radio resource is allocated by the resource scheduling device to the small base station based on the interference related information;

The small base station utilizes the wireless resource to provide services for user equipment.

According to another embodiment of the present invention, a radio resource scheduling method is provided, including: acquiring interference related information provided by a small base station, where the interference related information includes location information of the small base station;

Determining, according to the location information of the small base station, the use of the radio resource in the interference space of the small base station;

When the radio resource set of the macro base station has radio resources that are not used in the interference space range, The unused radio resource is allocated to the small base station, and the macro base station is a donor base station of the small base station;

Information about the allocated radio resources is provided to the small base station.

According to another embodiment of the present invention, a small base station is provided, including:

An information reporting unit, configured to provide interference related information to the resource scheduling device, where the interference related information includes location information of the small base station;

An information acquiring unit, configured to acquire information about a radio resource allocated by a resource scheduling device, where the radio resource is allocated by the resource scheduling device to the small base station based on the interference related information, and a communications unit, configured to use the wireless Resources provide services to user devices.

According to another embodiment of the present invention, a resource scheduling apparatus is provided, including:

An information acquiring unit, configured to acquire interference related information provided by the small base station, where the interference related information includes location information of the small base station;

a resource determining unit, configured to determine, according to location information of the small base station, a radio resource usage situation in a interference space range of the small base station;

a resource allocation unit, configured to allocate the unused radio resource to the small base station when a radio resource set of a donor macro base station of the small base station has radio resources that are not used in the interference space range;

And a notification unit, configured to provide information about the allocated radio resource to the small base station.

According to the description of the foregoing technical solution, the embodiment of the present invention has the following advantages: The small base station provides the self-interference related information to a resource scheduling device, so that the resource scheduling device can perform resource allocation based on the interference related information, which is beneficial to the small base station. Reasonably allocate radio resources to reduce interference that may occur between small base stations or between small base stations and macro base stations.

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 embodiments or the prior art description will be briefly described below, obviously, the following The drawings in the description are only some of the embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any inventive labor.

1 is a schematic diagram of a home base station network architecture in the prior art;

2 is a schematic diagram of cell splitting in a macro cell;

Figure 3a is a schematic diagram of a radio resource scheduling method according to an embodiment of the present invention; Figure 3b is a schematic diagram of another radio resource scheduling method according to an embodiment of the present invention; FIG. 5 is a simplified schematic flowchart of a radio resource scheduling method according to an embodiment of the present invention; FIG. 6 is a simplified flowchart of another radio resource scheduling method according to an embodiment of the present invention; ;

FIG. 6b is a simplified schematic flowchart of another radio resource scheduling method according to an embodiment of the present invention;

FIG. 7 is a schematic diagram of a small base station according to an embodiment of the present invention; FIG.

FIG. 8 is a schematic diagram of a macro base station according to an embodiment of the present invention; FIG.

FIG. 9 is a schematic diagram of a system for implementing radio resource scheduling according to an embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

FIG. 3 is a schematic diagram of a radio resource scheduling method according to an embodiment of the present invention, where the method includes:

S31a: The small base station provides interference related information to the macro base station, where the interference related information includes location information of the small base station;

S32a: The small base station acquires information about a radio resource allocated by a macro base station, where the radio resource is Is allocated to the small base station by the macro base station based on the interference related information;

S33a: The small base station uses the wireless resource to provide services for its user equipment.

The small base station in this embodiment may be various small base stations including Pico, HeNB and Femto, which can access the macro base station and provide self-interference related information to the macro base station, so that the macro base station is based on the interference related information. The resource allocation is beneficial to the macro base station to allocate radio resources reasonably for the small base station, so that the possibility that the small base station and other base stations forming potential interference are allocated the same radio resource is reduced, and interference occurs between the small base stations or between the small base station and the macro base station. The situation can be reduced.

Optionally, the providing, by the small base station, the interference related information to the macro base station may include: the small base station transmitting the interference related information to the macro base station by using a wired or wireless interface; or the small base station forwarding the interference related information to the macro base station by using the small base station gateway.

Optionally, the providing, by the small base station, the interference related information to the macro base station may include: after the power is turned on or after detecting the interference, the small base station detects its own location and obtains its own location information. Further, when the small base station detects that the location of the small base station is the same as the previous reported location, the macro base station is provided with the location-invariant acknowledgement information; when the small base station detects that the location of the small base station is different from the previous reported location, The detected new location information is provided to the macro base station.

Optionally, the small base station may detect a signal strength of a frequency band within a range of its device capabilities, and carry information about the signal strength in the interference related information.

Further, the interference related information may further include: an identifier of the small base station, and capability information of the small base station, where the capability information includes: a carrier frequency range of the small base station, a bandwidth range of the corresponding carrier frequency, and a maximum transmission power. When the macro base station already knows the identity of the small base station, the small base station does not need to report its identity.

Optionally, the method may further include: the small base station selects a radio resource for itself, and provides the macro base station with information of the radio resource selected by the macro base station; and correspondingly, the small base station acquires information about the radio resource allocated by the macro base station. The method includes: the small base station acquiring information about a radio resource that the macro base station re-allocates, or the small base station acquiring, by the macro base station, confirmation information of the radio resource that the macro base station agrees to select.

Optionally, when the small base station coverage area is divided into multiple cells, the interference correlation The information may also include radio resource usage of the plurality of cells.

In the foregoing embodiment, the small base station provides interference related information to its corresponding macro base station, so that the macro base station allocates radio resources to the small base station based on the interference related information, but the main body that allocates the related resources may also be an independent device. For example, it may be an OAM (Operation Administration Maintenance) device, and the OAM device may analyze, predict, plan, and configure the network and the service, which is not limited in this embodiment.

FIG. 3b is a schematic diagram of another method for scheduling a radio resource according to an embodiment of the present invention, where the method includes:

S31b: The macro base station acquires interference related information provided by the small base station, where the interference related information includes location information of the small base station;

S32b: The macro base station determines, according to the location information of the small base station, the use of the radio resource in the interference space of the small base station;

S33b: when the radio resource set of the macro base station has radio resources that are not used in the interference space range, the macro base station allocates the unused radio resources to the small base station;

S34b: The macro base station provides information about the allocated radio resources to the small base station.

The macro base station in this embodiment can acquire interference related information of multiple small base stations under its subordinates, and allocate radio resources based on interference related information of the small base station, thereby reducing the possibility of allocating the same radio resources between small base stations forming mutual interference with each other. , reducing potential interference between small base stations or between small base stations and macro base stations. The radio resource that is not used in the small base station interference space range in this embodiment is a radio resource used in the non-interference space range of the macro base station radio resource set, and the interference station may be an interference source station or interfered by the small base station. Site. Further, when there is no radio resource in the radio resource set of the macro base station that does not use the interference space range, the macro base station selects the radio resource with the lowest interference to the small base station in the radio resource set, and selects the radio resource. Assigned to the small base station.

Optionally, the information that the macro base station provides the allocated radio resource to the small base station may include: the macro base station sends the information of the allocated radio resource to the small base station, or the macro, by using a wired or wireless interface. The base station forwards the information of the allocated radio resources to the small base station through the small base station gateway. Optionally, the interference related information may include capability information of the small base station, or the macro base station may further acquire capability information of the small base station from the mobility management entity of the small base station; the capability information further includes: The carrier frequency range of the small base station, the bandwidth range of the corresponding carrier frequency, and the maximum transmit power. Of course, the macro base station may pre-store the capability information of each of the sub-base stations of the sub-base station, which is not limited in this embodiment.

Optionally, the macro base station may obtain information about the radio resource selected by the small base station for itself, determine whether the radio resource selected by the small base station is suitable, and the macro base station may re-allocate the radio resource for the small base station, or send the mobile station to the small base station to agree to the selection. Confirmation information for wireless resources.

In the foregoing embodiment, the small base station provides interference related information to its corresponding macro base station, so that the macro base station allocates radio resources to the small base station based on the interference related information, but the main body that allocates the related resources may also be an independent device. For example, an OAM (Operation Administration Maintenance) device, which can analyze, predict, plan, and configure the network and services of the OAM device, which is not limited in this embodiment.

FIG. 4 is a schematic diagram of interference of a small base station according to an embodiment of the present invention. In this embodiment, the macro base station allocates radio resources to the small base station based on the interference related information, and after obtaining the location information sent by the small base station, the macro base station may estimate the small base station according to the capability information of the small base station. The approximate serving cell radius r and the radius R coverage are used as the interference space range of the small base station. Of course, the macro base station may also pre-save the interference space range of each of the subordinate small base stations. The macro base station can preview the frequency resource set that has been used by other types of base station service areas (including other small base stations or other macro base stations) in the interference space of the small base station A, and if there are other remaining wireless resources, allocate the remaining wireless resources to the small Base station A; otherwise, the radio resource with the lowest interference level to the small base station A among the used frequency resource sets is selected, that is, if the small base station A uses the radio resource with the lowest interference level, the interference is small. It can be understood that there are multiple implementation manners for the interference space determination of the small base station, which will be described below by way of example only, and the examples are not intended to limit the present invention. In one example, only the interference space of the location may be considered, as shown in FIG. The macro base station can obtain the location information of all the small base stations that are powered on, and the small base station A that reports the location information is centered, and finds other stations within the range of the specific radius R, where the specific radius R is larger than the serving cell of the small base station A. Radius r. If there is a small base station B or a macro base station C in the specific range, it is considered that the small base station B or the macro base station C can serve as a potential interference station of the small base station A, and the resources used by the small base station B or the macro base station C in the interference space are not It is allocated to the small base station A; if the small base station D is not within the specific range, the small base station D is not a potential interference station of the small base station A, and resources used by the small base station D can be allocated to the small base station A. In addition, different macro base stations can obtain radio resource usage information of the small base station that they are interested in through the X2 interface or other means. In another example, the definition of the interference space may not only consider the location information, but also consider the power information of other small base stations, and prevent the small base station from transmitting power at a large distance, and the interference generated by the small base station A is large. A value of ν = /(Λ^), the function representation can be varied, such as v = 7 i /, P can be the transmit power or maximum transmit power of a small base station, ^ / is the distance between small base stations. The macro base station can calculate the W corresponding to other stations for the small base station, and if the W is greater than the preset certain threshold I, the other stations E are within the interference space of the small base station A. Even if the distance between different stations is long, due to the large transmission power of the station, potential interference may occur. This example can avoid allocating the same resources to the base stations with potential interference and reducing the invalid allocation of wireless resources. In another example, the macro base station can obtain signal information of different frequency points detected by the small base station, and the macro base station not only considers the interference space when performing resource allocation, but also needs to consider the real signal usage status near the small base station, thereby Make more accurate judgments. This example requires a small base station to self-check the radio frequency (also called carrier frequency), bandwidth and corresponding signal strength around itself, but this process will consume a certain time and increase the signaling overhead.

In this embodiment, the small base station reports the location information, so that the macro base station avoids selecting the radio resources that are likely to cause interference to be allocated to the small base station, and ensures the orthogonality of the radio resources allocated to different small base stations, thereby improving the quality of service.

An embodiment of the present invention will be described below by taking a home base station as an example. In the home base station system, each HeNB is located in at least one Macro eNB coverage cell, and when one HeNB accesses one In the case of a Macro eNB, the Macro eNB is referred to as the Donor eNB of the HeNB. The HeNB may have no corresponding HeNB gateway, and the HeNB and the Donor eNB may directly communicate. If the HeNB has a corresponding HeNBGW, the HeNB may report the related information to the Donor eNB through the HeNBGW. After calculating the scheduling information, the Donor eNB may first send the information to the HeNBGW, and then send the HeNBGW to the HeNB. Of course, the HeNB has the HeNBGW gateway. It is also possible to communicate directly with the Macro eNB. FIG. 5 is a schematic flowchart of a method for scheduling a radio resource according to an embodiment of the present invention, where the method includes:

S51: The home base station is turned on or detects interference.

S52: The home base station detects its own location. The HeNB can determine whether the location of the self changes by the detection after the power is turned on.

S53: The home base station reports its location information to its donor base station. Each time the HeNB is powered on or when the detected interference exceeds a predetermined threshold, the location information is first detected. If the location information of the HeNB does not change, the reported location information may be an acknowledgment message whose location has not changed; The location information changes, and its current location information can be reported to the Donor eNB. Of course, the HeNB can also provide its location information to the Donor eNB through the gateway, that is, the location information is forwarded by the HeNB gateway to the Donor eNB. The HeNB may also report the HeNB identity and the HeNB capability information, where the capability information includes a carrier frequency range, a bandwidth range, a maximum transmit power, and the like of the HeNB, so that the Donor eNB performs resource scheduling according to the reported information. Certainly, if the HeNB finds its own location change, it may select the non-reporting capability information. When the Donor eNB finds that it does not store the capability information of the HeNB, it acquires corresponding capability information from the HeNB, or the Donor eNB may request the MME or the HeNBGW to send the capability. information. The HeNB may report the information when initiating an access to the Donor eNB.

S54: The donor base station allocates radio resources to the home base station according to the location information reported by the home base station.

The Donor eNB may allocate radio resources for the link between the HeNB and its subordinate UEs according to the carrier allocation situation in the macro cell it collects, and the frequency band information and corresponding signal strength information used by the HeNB around the HeNB. The signal strength information may be an RSRP (Reference Signal Receiving Power) indicator. The method of allocating radio resources in this embodiment Similar to the resource allocation method in the existing cognitive radio technology, the Donor eNB can collect the location information reported by multiple HeNBs, considering the relative situation of one HeNB and the neighboring HeNBs, and the resource allocation and signal strength of the neighboring HeNBs. , allocate reasonable radio resources to each HeNB.

S55: The donor base station sends the allocation information of the radio resources to the home base station to indicate the allocated radio resources.

S56: The home base station provides the service for its subordinate user equipment by using the allocated radio resource. The resources allocated by the Donor eNB for the HeNB are used to serve the HeNB subordinate UE. If the HeNB is wirelessly connected to its subordinate UE, the HeNB may open its interface and transmit data with the UE using the allocated resources on the radio link.

In this embodiment, the HeNB can report the location information, so that the Donor eNB can allocate a reasonable radio resource according to the reported information, and the service is used by the HeNB and the subordinate UE. When the Donor eNB allocates resources for the HeNB, the mutual interference between the neighboring HeNBs can be reduced. Possibly, improve the quality of data transmission.

It can be understood that, in the foregoing process S54, the HeNB can also detect the surrounding wireless signal strength and report the surrounding wireless signal strength information to the Donor eNB. The HeNB can scan each frequency band in the range of its device capabilities, detect the signal strength of each frequency band, and report the above information to the Donor eNB. If the Donor eNB learns that the signal of a certain frequency band around the HeNB is strong, the band is not allocated to the link between the HeNB and its subordinate UEs, but other suitable radio resources are selected for allocation. In addition to the location information and the radio signal information detected by the HeNB, the HeNB may also report its own HeNB identity, so that the Donor eNB knows that the node capability of the currently reported information is the capability of the HeNB type.

FIG. 6 is a simplified schematic flowchart of another method for scheduling a radio resource according to an embodiment of the present invention, where the method includes:

S61a: The home base station is turned on or detects interference.

S62a: The home base station detects its own location and the surrounding wireless signal strength, and selects radio resources for itself.

S63a: The home base station reports its location information, surrounding wireless signal strength information, and selected radio resources to its donor base station. Every time HeNB is turned on or after detecting interference exceeding a predetermined threshold The location information of the HeNB is detected first. If the location information of the HeNB does not change, the location information reported may be an acknowledgment information that has not changed. If the location information changes, the current location information may be reported to the Donor eNB. . The HeNB may also have the capability of independently selecting a radio resource, and report the selected resource to the Donor eNB. The HeNB may report the information when initiating an access to the Donor eNB.

S64a: The donor base station determines whether the radio resource selected by the home base station is suitable, and if not, allocates a new radio resource to the home base station. The Donor eNB can determine whether the selected radio resource of the HeNB is suitable according to the carrier allocation situation in the macro cell it collects, the frequency band information used by the HeNB around the HeNB, and the corresponding signal strength information. The Donor eNB can collect the location information reported by multiple HeNBs, and after considering the relative situation of one HeNB and the neighboring HeNBs, and the resource allocation and signal strength of the neighboring HeNBs, it is confirmed whether the radio resources selected by the HeNB are suitable. If the Donor eNB determines that the selection is appropriate, then only the acknowledgment information is sent, which saves the bit information used to allocate the radio resources in the transmission; if the Donor eNB determines that the selection is inappropriate, it can allocate the new radio resources for the HeNB.

S65a: The donor base station sends the allocation information of the radio resources to the home base station to indicate the allocated new radio resources.

S66a: The home base station provides the service for its subordinate user equipment by using the allocated new radio resource. If the Donor eNB confirms that the resource selected by the HeNB is appropriate, the HeNB may receive an acknowledgment message from the Donor eNB, and may use its own selected resource to serve its subordinate UE.

The HeNB of the present embodiment has the capability of self-selecting radio resources, and reports related information such as location and surrounding wireless signal strength to the Donor eNB, and the Donor eNB confirms whether the selection of the HeNB is appropriate, and if necessary, the Donor eNB can allocate new resources to the HeNB. The possibility of mutual interference between adjacent HeNBs is reduced.

In the above embodiment, after the radio resource is selected by the HeNB, the HeNB can directly establish a radio link with the subordinate UE and serve the UE by using the radio resource selected by itself. If the Donor eNB determines that the selection made by the HeNB is appropriate, only the acknowledgment information is sent; otherwise the Donor eNB determines the selection of the HeNB. If not appropriate, the radio resources can be reallocated to the HeNB. The HeNB may make changes according to newly allocated resources of the Donor eNB, and use the new radio resources to serve the UE. In this way, the HeNB can quickly establish a link with its subordinate UEs to provide good services for real-time services. As shown in FIG. 6b, another simplified process of the radio resource scheduling method includes:

S61b: The home base station is turned on or detects interference.

S62b: The home base station detects its own location and the surrounding wireless signal strength, and selects radio resources for itself.

S63b: The home base station reports its location information, surrounding wireless signal strength information, and selected radio resources to its donor base station. For the specific reporting process, refer to the previous embodiment.

S64b: The donor base station determines whether the radio resource selected by the home base station is suitable, and if not, allocates a new radio resource to the home base station. The specific resource reallocation process can be referred to the previous embodiment.

S65b: The home base station serves the own terminal by using the selected radio resource.

S66b: The donor base station sends the allocation information of the radio resources to the home base station to indicate the allocated new radio resources.

S67b: The home base station provides the service for its subordinate user equipment by using the allocated new radio resource. It can be understood that S64b and S65b are respectively executed by the donor base station and the home base station, and are not limited by each other.

In the foregoing embodiment, the HeNB may report its own location information, surrounding wireless signal strength information, and its own HeNB identity when initiating an access procedure to the Donor eNB, and may also report a HeNB indication identifier (home base station identity confirmation identifier); After each power-on, the HeNB indication flag is separately used by the interface between the HeNB and the Donor eNB. The HeNB indication identifier is used to indicate that the device reporting information is a HeNB, so that the Donor eNB knows that the device has the capability of the HeNB, instead of the UE or other wireless node.

If there is a direct communication interface between the HeNB and the Donor eNB, information can be directly transferred between the two. If there is no direct communication interface between the HeNB and the Donor eNB, but the HeNBGW communicates, the HeNB can report the information that needs to be reported to the HeNBGW, and then the HeNBGW sends the letter. The information is reported to the Donor eNB corresponding to the HeNB. Correspondingly, the Donor eNB also sends its own information to the HeNBGW, and the HeNBGW transmits the information to the HeNB. It can be understood that, in the foregoing embodiment, the HeNBGW can report the capability information of the HeNB to the Donor eNB. If the HeNBGW has saved the capability information of the HeNB, the HeNB may not report the capability information to the Donor eNB. The information is reported to the Donor eNB along with other related information. Alternatively, when the Donor eNB finds that it does not have the capability information of the HeNB, the capability information may be obtained from the HeNBGW, or the MME may be requested to send the capability information. If the Donor eNB chooses to obtain the capability information from the HeNBGW, the HeNBGW may report the HeNB capability information stored by the HeNBGW to the Donor eNB. If the capability information is not available, the capability information may be obtained from the HeNB and then sent to the Donor eNB.

In the above embodiment, the HeNB may have only one cell, and multiple cells may exist. When a plurality of cells exist in one HeNB, the content of the related information reported above is refined to the cell level of the HeNB. For example, the HeNB can report the radio frequency usage of each cell of the HeNB; the resources allocated by the Donor eNB to the UEs of the HeNB can also be accurate to the cell level, that is, resource allocation is performed for each cell of the HeNB.

In the foregoing embodiment, the Donor eNB uses the interface between the HeNB and the HeNBGW to obtain information reported by the HeNB, and the information may include information required for interference management and resource scheduling, and uses the information to perform resource allocation, thereby avoiding the same resource. It is allocated to different HeNBs that are spatially close or have high interference with each other, which effectively improves spectrum utilization and reduces interference.

In the three embodiments of FIG. 5, FIG. 6a and FIG. 6b, the small base station provides interference related information to its corresponding macro base station, so that the macro base station allocates radio resources to the small base station based on the interference related information, but actually allocates related resources. The main body may also be an independent device, such as an OAM (Operation Administration Maintenance) device, which can analyze, predict, plan, and configure the daily network and services. limited.

FIG. 7 is a schematic diagram of a small base station according to an embodiment of the present invention, where the small base station 70 include:

The information reporting unit 71 is configured to send interference related information, where the interference related information includes location information of the small base station 70.

The information acquiring unit 72 is configured to acquire information about the radio resource allocated by the macro base station, where the radio resource is allocated by the macro base station to the small base station 70 based on the interference related information;

The communication unit 73 is configured to provide a service for the user equipment by using the wireless resource.

The small base station 70 of this embodiment includes, but is not limited to, various small base stations, such as Pico, HeNB, and Femto, which are similar to the terminal, can access the macro base station, accept the resources allocated by the macro base station, and use the resources as their subordinate terminals. Service site, providing services to the terminal. By providing the self-interference related information to the macro base station, the small base station is advantageous for the macro base station to reasonably allocate radio resources for the small base station, and to reduce interference that may occur between small base stations or small base stations and macro base stations.

Further, the small base station 70 may further include: a detecting unit 74, coupled to the information reporting unit 71, configured to detect a location of the small base station 70, and provide the detected small base station to the information reporting unit 71. 70 location information.

Further, the small base station 70 may further include: a selecting unit, configured to be the small base station

70: Selecting a radio resource, and providing the macro base station with the information of the selected radio resource; correspondingly, the information acquiring unit 72 is configured to: obtain the acknowledgement information that the macro base station agrees to the radio resource selected by the small base station 70, or the macro base station is the small base station 70. Information about reassigned wireless resources.

FIG. 8 is a schematic diagram of a macro base station according to an embodiment of the present invention. The macro base station 80 includes: an information acquiring unit 81, configured to acquire interference related information provided by a small base station, where the interference related information includes the small Location information of the base station;

The resource determining unit 82 is configured to determine, according to the location information of the small base station, the use of the radio resource in the interference space of the small base station;

a resource allocation unit 83, configured to allocate the unused radio resource to the small base station when a radio resource set of a macro base station has radio resources that are not used in the interference space range;

The notification unit 84 is configured to provide information about the allocated radio resources to the small base station. The macro base station 80 of the present embodiment can not only directly provide services for the user equipment, but also serve as a service station for a plurality of smaller base stations to obtain interference related information of multiple small base stations, and based on interference information of the small base station. The allocation of radio resources is performed to reduce the possibility of allocating the same radio resources between small base stations that form potential interference with each other, and to reduce interference between small base stations or between small base stations and macro base stations.

Further, the resource allocation unit 83 is further configured to: when there is no radio resource in the radio resource set of the macro base station that does not use the interference space range, select a radio resource that has the lowest interference to the small base station in the radio resource set, and The selected radio resource is allocated to the small base station.

Further, the macro base station 80 may further include: a determining unit, configured to acquire information about a radio resource selected by the small base station for itself, and determine whether the radio resource selected by the small base station is suitable, if the radio resource selected by the small base station is selected Inappropriate, reallocating radio resources for the small base station.

The macro base station provided in this embodiment may carry multiple small base stations, and may also carry other terminal equipments, and receive radio interference resources reasonably by receiving interference related information of subordinate small base stations, so that different small base stations and small base stations and other base stations There is no excessive interference between type base stations (such as other macro base stations). Try to avoid two stations with possible interference being allocated the same resources and improve the quality of service of small base stations. It can be understood that the related function of allocating radio resources by the macro base station can also be implemented by other devices. For example, an OAM (Operation Management Maintenance) device can include the information acquiring unit 81, the resource determining unit 82, the resource allocating unit 83, and The notifying unit 84 is configured to allocate resources for the small base station based on the interference related information.

FIG. 9 is a schematic diagram of a system for implementing radio resource scheduling according to an embodiment of the present invention, where the system includes:

At least one small base station 91 is configured to provide interference related information to the OAM device 93, where the interference related information includes location information of the small base station 91, and information about the wireless resource allocated by the OAM device 93, where the wireless resource is The OAM device 93 is allocated to the small base station 91 based on the interference related information; and uses the wireless resource to provide services for its subordinate user equipment.

The macro base station 92 provides an access network service for the at least one small base station 91; The OAM device 93 is configured to acquire interference related information provided by the small base station 91, and determine, according to the location information of the small base station 91, the use of the radio resource in the interference space of the small base station 91; and the radio resource of the macro base station 92. When the radio resources that are not used in the interference space range are collected, the unused radio resources are allocated to the small base station 91, and the information of the allocated radio resources is provided to the small base station 91.

The OAM device 93 can acquire necessary information required for allocating radio resources from the macro base station 92 and the small base station 91, and complete related tasks of radio resource allocation. The OAM device 93 can be connected to the macro base station 92 by wire or wirelessly, and obtain information such as the radio resource set of the macro base station 92 and the resource usage in the set; the OAM device 93 can directly acquire information from the small base station 91. The macro base station 92 can also be indirectly obtained by the macro base station 92. After the macro base station 92 acquires the information of the small base station 91, the information is forwarded to the OAM device 93. The OAM device 93 is only one device, and can be wired or wirelessly connected to other network devices. The specific implementation method is not limited in this embodiment.

In this embodiment, the small base station 91 and the macro base station 92 or the OAM device 93 can communicate through the small base station gateway 94. As shown in FIG. 9, several small base stations 91 can have a small base station gateway 94. The gateway 94 forwards data between the small base station 91 and the macro base station 92 or the OAM device 93, which is not further limited in this embodiment.

A person skilled in the art can understand that all or part of the process of implementing the above embodiment method can be completed by a computer program to instruct related hardware, and the program can be stored in a computer readable storage medium. In execution, the flow of an embodiment of the methods as described above may be included. The storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).

The above is only a few embodiments of the present invention, and various modifications and changes may be made to the present invention without departing from the spirit and scope of the invention. In the case of the skill, it is possible to combine with each other to form a new embodiment.

Claims

Rights request

A radio resource scheduling method, comprising:

2. The method according to claim 1, wherein the resource scheduling device is a macro base station and the macro base station is a donor base station of the small base station;

The providing, by the small base station, the interference related information to the resource scheduling device includes:

The small base station transmits interference related information to the macro base station through a wired or wireless interface; or the small base station forwards interference related information to the macro base station through the small base station gateway.

The method according to claim 1, wherein the resource scheduling device is an operation management maintenance device;

The small base station transmits interference related information to the operation management and maintenance device through a wired or wireless interface; or

The small base station forwards the interference related information to the operation management maintenance device through the small base station gateway or the macro base station.

The method according to claim 1, further comprising: after the power is turned on or after detecting the interference, the small base station obtains the location information of the small base station by detecting the location of the small base station.

The method according to claim 4, wherein the obtaining, by the small base station, the location information of the small base station by detecting the location of the small base station comprises:

When the small base station detects that the location of the small base station is the same as the previous reported location, the location information of the small base station is information for confirming that the location of the small base station is unchanged.

The method according to claim 1, wherein the interference related information further includes: The signal strength information of the frequency band within the device capability range of the small base station, the carrier frequency range of the small base station, the bandwidth range corresponding to the carrier frequency, and the maximum transmission power.

The method according to any one of claims 1 to 6, further comprising: the small base station selecting a radio resource for itself, and providing the resource scheduling device with information of the radio resource selected by the small base station;

The information that the small base station acquires the radio resource allocated by the resource scheduling device includes: the small base station acquires information about the radio resource re-allocated by the resource scheduling device for the small base station, or the small base station acquires the resource scheduling device to agree to the small base station selection Confirmation information for wireless resources.

8. A radio resource scheduling method, characterized in that:

Obtaining interference related information provided by the small base station, where the interference related information includes location information of the small base station;

When the radio resource set of the macro base station has radio resources that are not used in the interference space range, the unused radio resources are allocated to the small base station, and the macro base station is a donor base station of the small base station;

9. The method of claim 8, further comprising:

When there is no radio resource in the radio resource set of the macro base station that does not use the interference space range, the radio resource with the lowest interference to the small base station is selected in the radio resource set, and the selected radio resource is allocated to the small base station.

The method according to claim 8 or 9, further comprising:

Obtaining information of a radio resource selected by the small base station for the small base station;

Determining whether the radio resource selected by the small base station is suitable;

When the radio resource selected by the small base station is inappropriate, the radio resource is re-allocated for the small base station; when the radio resource selected by the small base station is suitable, the small base station is selected to agree to the small base station selection. Confirmation information for wireless resources.

11. A small base station, comprising:

The small base station according to claim 11, wherein the detecting unit is coupled to the information reporting unit, configured to detect a location of the small base station, and provide the detected small base station to the information reporting unit. Location information.

The small base station according to claim 11 or 12, further comprising: a selecting unit, configured to select a radio resource for the small base station, and provide information of the selected radio resource to the resource scheduling device;

The information acquiring unit is configured to: obtain, by the resource scheduling device, the acknowledgment information of the wireless resource selected by the small base station, or obtain the information of the wireless resource that the resource scheduling device re-allocates for the small base station.

14. A resource scheduling device, comprising:

The resource scheduling device according to claim 14, wherein the resource allocation list The element is further configured to: when there is no radio resource in the radio resource set of the macro base station that does not use the interference space range, select a radio resource with the lowest interference to the small base station in the radio resource set, and allocate the selected radio resource to the radio resource. Small base station.

The resource scheduling device according to claim 14, further comprising: a determining unit, configured to acquire information about a radio resource selected by the small base station for the small base station itself, and determine whether the radio resource selected by the small base station is Suitably, if the radio resource selected by the small base station is not suitable, the radio resource is re-allocated for the small base station.

The resource scheduling device according to any one of claims 14 to 16, wherein the resource scheduling device is an operation management maintenance device or a donor macro base station of the small base station.