CN102215594A - Scheduling method and device - Google Patents

Scheduling method and device Download PDF

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Publication number
CN102215594A
CN102215594A CN2011101738423A CN201110173842A CN102215594A CN 102215594 A CN102215594 A CN 102215594A CN 2011101738423 A CN2011101738423 A CN 2011101738423A CN 201110173842 A CN201110173842 A CN 201110173842A CN 102215594 A CN102215594 A CN 102215594A
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base station
information
interference strength
downlink interference
signaling
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CN2011101738423A
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CN102215594B (en
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刘锟
鲁照华
罗薇
李卫敏
刘向宇
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ZTE Corp
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ZTE Corp
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Priority to CN201110173842.3A priority Critical patent/CN102215594B/en
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Priority to PCT/CN2011/083458 priority patent/WO2012174828A1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/27—Control channels or signalling for resource management between access points
    • 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
    • H04W72/541—Allocation or scheduling criteria for wireless resources based on quality criteria using the level of interference
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/16—Interfaces between hierarchically similar devices
    • H04W92/20—Interfaces between hierarchically similar devices between access points

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  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The invention discloses a scheduling method and device. The method is applied to a base station and the base station executes the following steps: receiving the information of the transmitting power information of a neighbor base station on a scheduling unit and downlink interference strength information which are transmitted from the neighbor base station, wherein the downlink interference strength information is used for indicating the neighbor base station of whether users scheduled in the scheduling unit are subjected to the interference of the base station; according to the received information of the transmitting power of the neighbor base station and the downlink interference strength information, adjusting the scheduling unit used by the base station and/or the transmitting power used in the scheduling unit. According to the invention, interference among cells can be avoided and resources can be saved.

Description

Scheduling method and device
Technical Field
The present invention relates to the field of communications, and in particular, to a scheduling method and apparatus.
Background
In a wireless communication system, a base station communicates with a terminal via uplink and downlink, where downlink (forward) refers to the direction from the base station to the terminal, and uplink (reverse) refers to the direction from the terminal to the base station. A plurality of terminals may simultaneously transmit data to the base station through an uplink or simultaneously receive data from the base station through a downlink.
In an Orthogonal Frequency Division Multiplexing (OFDM) system, when a base station and a terminal in the same cell perform downlink data transmission, downlinks of the terminals are Orthogonal to each other, so that intra-cell interference can be avoided. However, the downlinks of terminals in different cells may not be orthogonal, and thus each terminal may experience downlink interference from other neighboring cell base stations, i.e., inter-cell interference. Reducing the impact of inter-cell interference on system performance is an important objective of OFDM system design, and if the inter-cell interference is severe, the system capacity, especially the transmission capability of cell edge users, is reduced, which further affects the coverage capability of the system and the performance of the terminal.
The inter-cell interference coordination technology can effectively reduce the inter-cell interference strength, namely, scheduling resources are reasonably allocated to adjacent cells through a coordination scheduling method, and the same resources are prevented from being allocated to edge users of the adjacent cells. In order to implement the inter-cell interference coordination technique, some necessary scheduling information must be coordinated between base stations before scheduling. For example, in the related art, the base station sends Narrowband transmit Power (RNTP) signaling to the neighboring base stations. Fig. 1 is a schematic diagram of an RNTP information format in the related art, as shown in fig. 1, available resources of a Base Station 1(Base Station 1, abbreviated as BS1) may be divided into N Resource Blocks (RBs), reference numbers RB1, RB2, RB3,. RB (N-1), and RBn, for each RB Resource, RNTP has a bit information corresponding thereto, where "0" indicates that transmission power of the RB is low, and "1" indicates that transmission power of the RB is high, so that the format of RNTP signaling is "100.. 01", BS1 transmits RNTP signaling to Base stations of neighboring cells, such as BS2 and BS3, fig. 2 is a schematic diagram of an RNTP information transmission scheme in the related art, and when BS2 and BS3 receive RNTP transmitted by BS1, BS1 knows that high-power transmission data is used on RB1 and RBn in order to avoid high-power transmission interference to the data, BS2 and BS3 may transmit data with low power on RB1 and RBn or not schedule users on that RB.
Although the above scheme can avoid high interference between cells, the scheme is at the cost of reducing the utilization rate of resources.
Disclosure of Invention
The present invention is directed to a scheduling method and apparatus, so as to solve at least the above problems.
According to an aspect of the present invention, there is provided a scheduling method applied in a base station, where the base station performs the steps of: receiving information of transmission power of the adjacent base station on a scheduling unit and downlink interference strength information sent by the adjacent base station, wherein the downlink interference strength information is used for indicating whether a user scheduled by the adjacent base station on the scheduling unit is interfered by the base station; and adjusting the scheduling unit used by the base station and/or the transmitting power on the used scheduling unit according to the received transmitting power information of the adjacent base station and the downlink interference strength information.
Receiving the information of the transmitting power and the downlink interference strength information sent by the adjacent base station by at least one of the following modes: receiving an indication signaling sent by the adjacent base station, wherein the indication signaling carries the downlink interference strength information; or receiving a scheduling signaling sent by the adjacent base station, where the scheduling signaling carries information of the transmission power on the scheduling unit and the downlink interference strength information.
Receiving the scheduling signaling sent by the neighboring base station includes: receiving a narrowband transmitting power signaling sent by the adjacent base station, wherein the narrowband transmitting power signaling carries information of transmitting power of the adjacent base station on the different scheduling units; and receiving a downlink interference strength indication signaling sent by the adjacent base station, wherein the downlink interference strength indication signaling carries the downlink interference strength information.
The indication signaling is narrowband transmitting power signaling; wherein the narrowband transmission power signaling is used for carrying information of the transmission power of the adjacent base station on the different scheduling units.
The adjacent base station loads the downlink interference strength information on a narrow-band transmission power signaling at a preset time and sends the information to the base station by the adjacent base station; wherein the predetermined time is determined by the base station and the neighboring base station or is configured by a standard default.
The scheduling unit is one or more resource blocks, RBs.
According to another aspect of the present invention, there is provided a scheduling apparatus, applied in a base station, including: a receiving module, configured to receive information of transmission power of an adjacent base station on a scheduling unit and downlink interference strength information, where the downlink interference strength information is used to indicate whether a user scheduled by the adjacent base station on the scheduling unit is interfered by the base station; and the adjusting module is used for adjusting the scheduling unit used by the base station and/or the transmitting power on the used scheduling unit according to the received transmitting power information of the adjacent base station and the downlink interference strength information.
The receiving module is configured to receive the information of the transmit power and the downlink interference strength information sent by the neighboring base station by at least one of the following manners: receiving an indication signaling sent by the adjacent base station, wherein the indication signaling carries the downlink interference strength information; or receiving a scheduling signaling sent by the adjacent base station, where the scheduling signaling carries information of the transmission power on the scheduling unit and the downlink interference strength information.
In a case where the information of the transmission power and the downlink interference strength information sent by the neighboring base station are received by receiving the scheduling signaling sent by the neighboring base station, the receiving module includes: a first receiving module, configured to receive a narrowband transmission power signaling sent by the neighboring base station, where the narrowband transmission power signaling carries information of transmission powers of the neighboring base station on the different scheduling units; a second receiving module, configured to receive a downlink interference strength indication signaling sent by the neighboring base station, where the downlink interference strength indication signaling carries the downlink interference strength information, and the signaling is pre-agreed by the base station and the neighboring base station.
The indication signaling is narrowband transmitting power signaling.
According to the invention, the information of the transmitting power of the adjacent base station on the scheduling unit and the downlink interference strength information sent by the adjacent base station are received, wherein the downlink interference strength information is used for indicating whether the user scheduled by the adjacent base station on the scheduling unit is interfered by the base station; and adjusting the scheduling unit used by the base station and/or the transmitting power on the scheduling unit used by the base station according to the received transmitting power information of the adjacent base station and the downlink interference strength information, so that the problem of resource waste caused by avoiding inter-cell interference is solved, and the effect of saving resources is achieved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
fig. 1 is a diagram illustrating an RNTP information format according to the related art;
fig. 2 is a diagram illustrating an RNTP information transmission method according to the related art;
fig. 3 is a schematic diagram of a wireless communication system topology according to the related art;
FIG. 4 is a flow chart of a scheduling method according to an embodiment of the present invention;
fig. 5 is a block diagram of a scheduling apparatus according to an embodiment of the present invention;
fig. 6 is a block diagram of a receiving module in a scheduling apparatus according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of a wireless communication system topology in accordance with a preferred embodiment of the present invention;
fig. 8 is a diagram illustrating a downlink interference strength indication signaling format according to a preferred embodiment of the present invention;
fig. 9 is a diagram illustrating another downlink interference strength indication signaling format according to the preferred embodiment of the present invention.
Detailed Description
The invention will be described in detail hereinafter with reference to the accompanying drawings in conjunction with embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
Fig. 3 is a schematic diagram of a wireless communication system topology related to the present embodiment, as shown in fig. 3, a BS1 transmits to BS2 and BS3(BS1 is a neighboring base Station of BS2 and BS 3), and its transmission power at a resource scheduling unit 1 (for example, the scheduling unit may be one resource block RB1) is high, if RNTP is used for transmission, the bit of the scheduling unit 1 is 1 on the RNTP, which indicates that BS1 is to serve a high power edge user Mobile terminal 1(Mobile Station 1, abbreviated as MS 1); in order to avoid interference to BS1, regardless of whether a user MS1 scheduled by BS1 is really interfered by BS2 and BS3, in the prior art, both BS2 and BS3 need to avoid interference to MS1 when scheduling a user, and in implementation, MS1 is not necessarily interfered by BS2 and BS3, for example, in fig. 3, MS1 is only interfered by BS3 and not by BS2, but BS2 also needs to avoid interference to MS1 when scheduling a user, so that the usage rate of resources of BS2 is reduced, and waste of resources is caused.
In this embodiment, a scheduling method is provided, and fig. 4 is a flowchart of a scheduling method according to an embodiment of the present invention, as shown in fig. 4, the method is applied in a base station, and the base station performs steps including:
step S402, receiving information of transmission power of the neighboring base station on a scheduling unit and downlink interference strength information sent by the neighboring base station, where the downlink interference strength information is used to indicate whether a user scheduled by the neighboring base station on the scheduling unit is interfered by the base station, for example, the scheduling unit is one or more resource blocks RB;
step S404, adjusting the scheduling unit used by the base station and/or the transmission power on the scheduling unit used by the base station according to the received information of the transmission power of the neighboring base station and the information of the downlink interference strength.
Through the steps, the downlink interference strength information is increased, and the adjustment is carried out by combining the information and the information of the transmitting power, so that the interference among base station cells can be avoided to a certain extent, the resources are reasonably used, and the resources are saved.
There are many sending methods of the downlink interference information, and any sending method does not affect the solution of the technical problem and the achievement of the technical effect, for example, the base station receives the indication signaling sent by the adjacent base station, where the indication signaling carries the downlink interference strength information, and the indication signaling may be some other signaling listed in this embodiment, as long as the indication signaling carries the downlink interference information; for another example, the scheduling signaling sent by the neighboring base station may be received, where the scheduling signaling carries information of the transmission power on the scheduling unit and information of the downlink interference strength, that is, the neighboring base station sends a dedicated signaling, and the format of the dedicated signaling may be preset according to requirements.
Preferably, in the case of receiving the information of the transmission power and the downlink interference strength information sent by the neighboring base station by receiving the scheduling signaling sent by the neighboring base station, the receiving the scheduling signaling sent by the neighboring base station includes: receiving a narrow-band transmitting power signaling sent by an adjacent base station, wherein the narrow-band transmitting power signaling carries information of transmitting power of the adjacent base station on different scheduling units; and receiving a downlink interference strength indication signaling sent by an adjacent base station, wherein the downlink interference strength indication signaling carries downlink interference strength information. The processing mode is simple to realize and clear in signaling format.
In implementation, a narrowband transmission power signaling can also be used as an indication signaling, the narrowband transmission power signaling is used for carrying information of transmission power on different scheduling units of adjacent base stations, at this time, the indication signaling carries downlink interference strength indication information by means of the narrowband transmission power signaling, and the narrowband transmission power signaling also carries information of transmission power of different scheduling units, so that the purpose of avoiding inter-cell interference and saving resources can be achieved directly through the narrowband transmission power signaling. Of course, it is believed that the base station may carry this downlink interference strength information on the narrowband transmit power signaling at a predetermined time, where the predetermined time is determined by the base station and the neighboring base station or is configured by standard default.
The existing signaling can be adopted by receiving the indication signaling or the scheduling signaling, or one or two messages can be newly added for transmitting the two messages. For example, for convenience of implementation, the two pieces of information may be sent through a narrow-band transmission power signaling, or the two pieces of information may be sent through two narrow-band transmission power signaling separately, or one of the two pieces of information may be sent through a narrow-band transmission power signaling and then the other of the two pieces of information may be sent through another separate signaling.
In this embodiment, a preferred embodiment is provided, in which the neighboring base station sending the information of the transmission power of the neighboring base station on the scheduling unit and the information of the downlink interference strength comprehensively considers the above two information, for example, the BS1 sending the information of the indicated transmission power and the information of the downlink interference strength to the BS2 may be implemented by three cases: 1, the BS1 has stronger transmitting power on RB1, the corresponding bit is represented as 1, the BS2 can bring interference, and the corresponding bit is 1; the BS1 has stronger transmitting power on RB1, the corresponding bit thereof is expressed as 1, and the BS2 does not cause interference to the corresponding bit thereof to be 0; BS1 has weak transmission power on RB1, and its corresponding bit is 0, in which case it can be disregarded whether BS2 will cause interference. Thus for these three cases, 11 indicates that BS2 does not schedule users on RB1 or transmit power is low on RB1, 10 and 00 both indicate that BS2 can schedule users on RB1 and use higher transmit power, thus it can be seen that the 10 and 00 indications are consistent and thus can be represented by "0" and can be represented by "1" for "11", thus only one bit needs to be used for representation by one resource scheduling unit. At this time, if the RNTP is used to transmit the two pieces of information, there is no need to change the RNTP signaling, but the bit value of the RNTP signaling transmitted to different neighboring base stations may be different, which is different from the bit value carried in the RNTP signaling transmitted to all neighboring base stations in the related art.
For example, the downlink interference strength information sent by the neighboring base station may be from a terminal, and the terminal may obtain, by receiving signal qualities of the neighboring base station and the base station, interference strength information that the terminal receives from other base stations except the base station to which the terminal belongs, and then notify the neighboring base station in a reporting manner.
Fig. 5 is a block diagram of a scheduling apparatus according to an embodiment of the present invention, and as shown in fig. 5, the scheduling apparatus is applied in a base station, and includes: a receiving module 52 and an adjusting module 54, which are used for implementing the above embodiments and preferred embodiments, and are not described again after being described, and the modules involved in the apparatus are described below.
A receiving module 52, configured to receive information of transmission power of the neighboring base station on the scheduling unit and downlink interference strength information, where the downlink interference strength information is used to indicate whether a user scheduled by the neighboring base station on the scheduling unit is interfered by the base station, for example, the scheduling unit is one or more resource blocks RB;
and an adjusting module 54, connected to the receiving module 52, for adjusting the scheduling unit used by the base station and/or the transmission power on the scheduling unit used according to the received information of the transmission power of the neighboring base station and the downlink interference strength information.
The receiving module 52 is configured to receive, through an indication signaling (for example, the indication signaling is a narrowband transmit power signaling), information of transmit powers of the neighboring base stations on different scheduling units and the downlink interference strength information, where the information is sent by the neighboring base stations; or, receiving, by a scheduling signaling, information of transmission power of the neighboring base station on different scheduling units and the downlink interference strength information, which are sent by the neighboring base station.
In the case of receiving the information of the transmission power and the downlink interference strength information sent by the neighboring base station by receiving the scheduling signaling sent by the neighboring base station, the receiving module 52 includes a first receiving module 522 and a second receiving module 524, fig. 6 is a block diagram of a receiving module in the scheduling apparatus according to the embodiment of the present invention, and as shown in fig. 6, the following describes modules related to the receiving module 52.
A first receiving module 522, configured to receive a narrowband transmission power signaling sent by the neighboring base station, where the narrowband transmission power signaling carries information of transmission powers of the neighboring base station on different scheduling units;
a second receiving module 524, connected to the first receiving module 522, configured to receive a downlink interference strength indication signaling sent by the neighboring base station, where the downlink interference strength indication signaling carries the downlink interference strength information, and the signaling is pre-agreed by the base station and the neighboring base station.
The following description is given in conjunction with the preferred embodiments, which combine the above embodiments and preferred embodiments.
The preferred embodiment provides a method for sending and receiving a downlink interference strength indication signaling (the signaling carries downlink interference strength information, that is, the signaling carrying the downlink interference strength information in the preferred embodiment may be referred to as a downlink interference strength indication signaling, and as described above, the signaling may be implemented by improving the existing signaling or adding a dedicated signaling). The method provided in the preferred embodiment is explained below.
A first base station sends downlink interference strength indication information to a second base station, wherein the first base station is an access node in a wireless network and can be a macro base station, a micro base station, a home base station, a relay or other equipment which can directly or indirectly provide service for a terminal; the second base station is an access node adjacent to the first base station; the downlink interference strength indication information at least comprises downlink interference strength indication information of one or more scheduling units.
Preferably, the scheduling unit may be one or more RBs available to the first base station, and the downlink interference strength indication information of the scheduling unit may be described by N bits (N is a positive integer greater than or equal to 1).
Preferably, the mapping relationship between the downlink interference strength indication information and the downlink interference strength is configured by a standard default; the downlink interference strength indication information can be sent to the second base station by the first base station through a special signaling; the sending mode of the proprietary signaling can be periodic sending or signaling notification by an upper network unit to the first base station; if periodic transmission is selected, the period may be configured by standard defaults.
Preferably, the downlink interference strength indication information may also be carried on other signaling, and sent to the second base station by the first base station, for example, the other signaling may be signaling for sending RNTP information, where the first base station sends RNTP information according to a predetermined mapping rule, and the second base station obtains the downlink interference strength indication information according to the predetermined mapping rule; the predetermined mapping rule may be predetermined by the first base station and the second base station together, or may be configured by a standard default.
The second base station receives downlink interference strength indication information sent by the first base station, and then obtains a downlink interference strength value of the first base station on the scheduling unit, wherein the higher the downlink interference strength value is, the more easily a user scheduled by the first base station on the scheduling unit is interfered by the second base station; the lower the downlink interference strength value is, the less the user scheduled by the first base station on the scheduling unit is likely to be interfered by the second base station.
By the method for sending and receiving the downlink interference strength indication signaling, the base stations which need to uniformly adjust the transmission power of the scheduling unit or the scheduling unit of the resource in the related technology are respectively judged, the base stations which need to be adjusted are adjusted, and related processing is not needed.
Fig. 7 is a schematic diagram of a wireless communication system topology according to a preferred embodiment of the present invention, and two preferred embodiments are described below in conjunction with fig. 7.
Preferred embodiment 1
In the preferred embodiment, the neighboring base stations of the BS1 are BS2 and BS3, and the available downlink resource of the BS1 is 50 RBs (RB1, RB2, RBs 50). The serving base station of MS1 is BS1 and the strong interferer is BS3, the serving base station of MS2 is BS2 and there is no strong interferer, the serving base station of MS3 is BS3 and the strong interferer is BS 1.
The BS1 completes the allocation of user resources of the cell and allocates resources of RB1 to MS 1. Wherein, the MS1 is a cell edge user, and the BS1 needs to use a high-power carrier for transmitting data;
the BS1 sends RNTP signaling to BS2 and BS3 to indicate the level of carrier transmit power on each RB. Here, "0" indicates that the transmission power of the RB is low, and "1" indicates that the transmission power of the RB is high. In the preferred implementation, assuming that only high power transmission is used on RB1, the format of RNTP signaling is "100.. 00";
the BS2 and the BS3 receive the RNTP signaling sent by the BS1, and know the RNTP value of each RB of 100.. 00 through decoding, and further know that the BS1 adopts high power to send data on the RB 1;
BS1 transmits downlink interference strength indication signaling DL _ Strlnterf2 to BS2, since BS1 employs high power transmission on RB1, but since the strong interference source of user MS1 allocated by BS1 on RB1 does not include BS2, BS2 may not consider the effect of interference on MS1 on RB 1. The format of DL _ Strlnterf2 is shown in fig. 8, fig. 8 is a schematic diagram of a downlink interference strength indication signaling format according to the preferred embodiment of the present invention, wherein "0" means that the user scheduled by BS1 on RB1 will not be interfered by BS2, and "1" means that the user scheduled by BS1 on RB1 will be interfered by BS 2;
the BS1 sends downlink interference strength indication signaling DL _ Strlnterf3 to BS3, and since BS1 adopts high power transmission on RB1 and a strong interference source of user MS1 allocated by BS1 on RB1 includes BS3, BS3 needs to consider the effect of interference on MS1 when scheduling users on RB 1. The format of DL _ Strlnterf3 is shown in fig. 9, fig. 9 is a schematic diagram of another downlink interference strength indication signaling format according to the preferred embodiment of the present invention, where "0" means that the user scheduled by BS1 on RB1 will not be interfered by BS3, and "1" means that the user scheduled by BS1 on RB1 will be interfered by BS 3;
the BS2 and BS3 complete scheduling of users in the primary cell according to the received RNTP and downlink interference strength indication signaling sent by BS 1: the BS2 determines that RNTP information (high power indication information of RB1) transmitted by BS1 does not need to be considered on RB1, i.e., that it is not necessary to reduce the transmission power of RB1 of the own cell or not schedule resources of RB1 in order to avoid interference, based on the received RNTP and DL _ Strlnterf2 transmitted by BS 1; when the BS3 determines that RNTP information (high power indication information of RB1) transmitted by BS1 needs to be considered in RB1 based on the RNTP and DL _ Strlnterf3 transmitted by the received BS1, the BS3 needs to reduce the transmission power of RB1 of its own cell or not schedule resources of RB1 in order to avoid interference when scheduling users in RB 1.
Preferred embodiment two
In the preferred embodiment, the neighboring base stations of the BS1 are BS2 and BS3, and the available downlink resource of the BS1 is 50 RBs (RB1, RB2, RBs 50). The serving base station of MS1 is BS1 and the strong interferer is BS3, the serving base station of MS2 is BS2 and there is no strong interferer, the serving base station of MS3 is BS3 and the strong interferer is BS 1.
The BS1 completes the allocation of user resources of the cell and allocates resources of RB1 to MS 1. Wherein, the MS1 is a cell edge user, and the BS1 needs to use a high-power carrier for transmitting data;
a transmitting rule and a receiving method of RNTP are predefined among BS1, BS2 and BS 3;
BS1 transmits twice consecutive RNTP signaling to BS2 and BS 3; wherein, the first time of RNTP signaling is used for indicating the carrier transmission power on each RB of the base station. Here, "0" indicates that the transmission power of the RB is low, and "1" indicates that the transmission power of the RB is high. In the preferred embodiment, assuming that only high power transmission is used on RB1, the format of RNTP signaling is "100.. 00"; the second RNTP signaling is that the BS1 sends downlink interference strength indication information to the BS2 and the BS3 by using the RNTP signaling. BS1 transmits downlink interference strength indication information DL _ Strlnterf2 to BS2 by RNTP signaling, because BS1 employs high power transmission on RB1, but since the strong interference source of user MS1 allocated by BS1 on RB1 does not include BS2, BS2 may not consider the effect of interference on MS1 on RB 1. The format of DL _ Strlnterf2 is shown in fig. 8, where "0" means that the user scheduled by BS1 on RB1 will not be interfered by BS2, and "1" means that the user scheduled by BS1 on RB1 will be interfered by BS 2; the BS1 transmits downlink interference strength indication information DL _ Strlnterf3 to BS3 by RNTP signaling, and since BS1 employs high power transmission on RB1 and a strong interference source of user MS1 allocated by BS1 on RB1 includes BS3, BS3 needs to consider the effect of interference on MS1 when scheduling users on RB 1. The format of DL _ Strlnterf3 is shown in fig. 9, where "0" means that the user scheduled by BS1 on RB1 will not be interfered by BS3, and "1" means that the user scheduled by BS1 on RB1 will be interfered by BS 3;
the BS2 and the BS3 receive the first RNTP signaling sent by the BS1, and know the RNTP value "100.. 00" of each RB through decoding, and further know that the BS1 will send data on the RB1 with high power;
the BS2 and the BS3 acquire the downlink interference strength indication information according to the second RNTP signaling received from the BS 1;
the BS2 determines that RNTP information (high power indication information of RB1) transmitted by BS1 does not need to be considered on RB1, i.e., that it is not necessary to reduce the transmission power of RB1 of the own cell or not schedule resources of RB1 in order to avoid interference, based on the received RNTP and DL _ Strlnterf2 transmitted by BS 1; when the BS3 determines that RNTP information (high power indication information of RB1) transmitted by BS1 needs to be considered in RB1 based on the RNTP and DL _ Strlnterf3 transmitted by the received BS1, the BS3 needs to reduce the transmission power of RB1 of its own cell or not schedule resources of RB1 in order to avoid interference when scheduling users in RB 1.
It will be apparent to those skilled in the art that the modules or steps of the present invention described above may be implemented by a general purpose computing device, they may be centralized on a single computing device or distributed across a network of multiple computing devices, and alternatively, they may be implemented by program code executable by a computing device, such that they may be stored in a storage device and executed by a computing device, or they may be separately fabricated into various integrated circuit modules, or multiple modules or steps thereof may be fabricated into a single integrated circuit module. Thus, the present invention is not limited to any specific combination of hardware and software.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A scheduling method applied in a base station, wherein the base station performs the steps of:
receiving information of transmission power of the adjacent base station on a scheduling unit and downlink interference strength information sent by the adjacent base station, wherein the downlink interference strength information is used for indicating whether a user scheduled by the adjacent base station on the scheduling unit is interfered by the base station;
and adjusting the scheduling unit used by the base station and/or the transmitting power on the used scheduling unit according to the received transmitting power information of the adjacent base station and the downlink interference strength information.
2. The method of claim 1, wherein the information of the transmission power and the downlink interference strength information sent by the neighboring base station are received by at least one of:
receiving an indication signaling sent by the adjacent base station, wherein the indication signaling carries the downlink interference strength information;
and receiving a scheduling signaling sent by the adjacent base station, wherein the scheduling signaling carries information of the transmission power on the scheduling unit and the downlink interference strength information.
3. The method of claim 2, wherein receiving the scheduling signaling sent by the neighboring base station comprises:
receiving a narrowband transmitting power signaling sent by the adjacent base station, wherein the narrowband transmitting power signaling carries information of transmitting power of the adjacent base station on the different scheduling units;
and receiving a downlink interference strength indication signaling sent by the adjacent base station, wherein the downlink interference strength indication signaling carries the downlink interference strength information.
4. The method of claim 2, wherein the indication signaling is narrowband transmit power signaling; wherein the narrowband transmission power signaling is used for carrying information of the transmission power of the adjacent base station on the different scheduling units.
5. The method of claim 4, wherein the neighboring base station carries the downlink interference strength information on the narrowband transmission power signaling at a predetermined time, and the downlink interference strength information is sent to the base station by the neighboring base station; wherein the predetermined time is determined by the base station and the neighboring base station or is configured by a standard default.
6. The method of claim 1, wherein the scheduling unit is one or more Resource Blocks (RBs).
7. A scheduling apparatus applied in a base station, comprising:
a receiving module, configured to receive information of transmission power of an adjacent base station on a scheduling unit and downlink interference strength information, where the downlink interference strength information is used to indicate whether a user scheduled by the adjacent base station on the scheduling unit is interfered by the base station;
and the adjusting module is used for adjusting the scheduling unit used by the base station and/or the transmitting power on the used scheduling unit according to the received transmitting power information of the adjacent base station and the downlink interference strength information.
8. The apparatus of claim 7, wherein the receiving module is configured to receive the information of the transmission power and the downlink interference strength information sent by the neighboring base station by at least one of:
receiving an indication signaling sent by the adjacent base station, wherein the indication signaling carries the downlink interference strength information; or,
and receiving a scheduling signaling sent by the adjacent base station, wherein the scheduling signaling carries information of the transmission power on the scheduling unit and the downlink interference strength information.
9. The apparatus of claim 8, wherein in case of receiving the information of the transmission power and the downlink interference strength information sent by the neighboring base station by receiving the scheduling signaling sent by the neighboring base station, the receiving module comprises:
a first receiving module, configured to receive a narrowband transmission power signaling sent by the neighboring base station, where the narrowband transmission power signaling carries information of transmission powers of the neighboring base station on the different scheduling units;
a second receiving module, configured to receive a downlink interference strength indication signaling sent by the neighboring base station, where the downlink interference strength indication signaling carries the downlink interference strength information, and the signaling is pre-agreed by the base station and the neighboring base station.
10. The apparatus of claim 8, wherein the indication signaling is narrowband transmit power signaling.
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