WO2013071719A1 - 一种下行控制信道的功率的协调系统、方法及基站 - Google Patents

一种下行控制信道的功率的协调系统、方法及基站 Download PDF

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Publication number
WO2013071719A1
WO2013071719A1 PCT/CN2012/072176 CN2012072176W WO2013071719A1 WO 2013071719 A1 WO2013071719 A1 WO 2013071719A1 CN 2012072176 W CN2012072176 W CN 2012072176W WO 2013071719 A1 WO2013071719 A1 WO 2013071719A1
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pdcch
terminal
base station
information
occupied
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PCT/CN2012/072176
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English (en)
French (fr)
Inventor
关艳峰
陈宪明
张峻峰
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中兴通讯股份有限公司
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Publication of WO2013071719A1 publication Critical patent/WO2013071719A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC

Definitions

  • the present invention relates to the field of communications, and in particular, to a power coordination system, method, and base station for a downlink control channel.
  • LTE Long Term Evolution
  • OFDMA Orthogonal Frequency Division Multiplexing Access
  • ICI Inter-Cell Interference
  • LTE also standardizes many technologies, such as Inter-Cell Interfernce Cancellation (ICIC).
  • the downlink ICIC technology implements the downlink interference pre-alert function based on the relative Narrowband TX Power (RNTP) limitation of the eNodeB, but the method can only be used for the Physical Downlink Shared Channel (PDSCH).
  • RTP relative Narrowband TX Power
  • PDSCH Physical Downlink Shared Channel
  • the experimental network test and simulation can be found that the capacity and coverage of the Physical Downlink Control Channel (PDCCH) are problematic because the PDCCH channel is filled with the remaining Control Channel Element (CCE). Padding) causes the PDCCH channel to be in a fully loaded state under the same frequency network, and the interference from the neighboring cell is large, thereby reducing the reception performance of the PDCCH.
  • the information such as the scheduling information of the downlink shared channel is carried by the PDCCH. If the receiving performance of the PDCCH is reduced, the performance of the entire network is seriously degraded.
  • PDCCH is used to carry downlink control information of the user equipment (UE) (Downlink) Control Information, DCI), specifically includes uplink scheduling information, downlink scheduling information, power control information, public information, etc., and supports multiple DCI formats.
  • the DCI generation process includes information bits through cyclic redundancy check, coding, sub-block interleaving, rate matching, scrambling, modulation, etc., and finally mapped to a Resource Element Group (REG).
  • the UE identifies the PDCCH by the Radio Network Temporary Identifier (RNTI) allocated by the UE to the UE through the network.
  • RNTI Radio Network Temporary Identifier
  • the LTE system has four types of aggregation PDCCHs, and the four levels are 1, 2, 4, and 8 CCEs. Obviously, the higher the level, the more resources are needed to transmit one PDCCH channel, and the coverage may be The more stable, but the less efficient.
  • the eNB performs equal power allocation on the PDCCH of each UE, that is, removes the Physical Control Format Indication Channel (PCFICH) and the physical hybrid retransmission indication.
  • PCFICH Physical Control Format Indication Channel
  • the remaining power is equally divided into the CCEs or REGs occupied by the PDCCH, and the appropriate DCI format and aggregation level are selected according to the length of the DCI information of the UE and the channel conditions.
  • the problem is that the problem of co-channel interference cannot be reduced.
  • the transmission power of the PDCCH is adjusted according to the feedback of the received signal to noise ratio of the UE, but the interference between the cells cannot be coordinated.
  • the embodiments of the present invention provide a system, a method, and a base station for coordinating power of a downlink control channel, which can reduce inter-cell interference, thereby improving the reception performance of the PDCCH without changing the interface between the UE and the eNB.
  • An embodiment of the present invention provides a method for coordinating power of a downlink control channel, including: transmitting, by a serving base station of a first terminal, a physical downlink control channel of the first terminal to a neighboring base station
  • the neighboring base station that receives the PDCCH information determines, according to the PDCCH information of the first terminal, the physical resource occupied by the PDCCH of the first terminal and the physical resource occupied by the PDCCH of the second terminal served by the neighboring base station
  • the neighboring base station adjusts the transmit power of the second terminal or adjusts the physical resource occupied by the second terminal.
  • the above method can also have the following characteristics:
  • the PDCCH information includes time-frequency resource information occupied by the PDCCH.
  • the PDCCH information further includes power information for transmitting the PDCCH.
  • the time-frequency resource information occupied by the PDCCH includes: an Orthogonal Frequency Division Multiplexing (OFDM) symbol number occupied by the PDCCH, and a Control Channel Element (CCE) index information occupied by the PDCCH; or
  • OFDM Orthogonal Frequency Division Multiplexing
  • CCE Control Channel Element
  • the time-frequency resource information occupied by the PDCCH includes: the number of OFDM symbols occupied by the PDCCH, the radio network temporary identifier (RNTI) of the first terminal, and the aggregation level of the PDCCH.
  • RNTI radio network temporary identifier
  • the time-frequency resource information occupied by the PDCCH further includes: quantity information of a physical hybrid retransmission indication channel (PHICH) of the serving base station.
  • PHICH physical hybrid retransmission indication channel
  • the step of the neighboring base station determining that the physical resource occupied by the PDCCH of the first terminal and the physical resource occupied by the second terminal served by the neighboring base station collide includes: the time-frequency resource occupied by the neighboring base station according to the PDCCH
  • the information determines a physical resource location occupied by the PDCCH of the first terminal, and further determines a second terminal that conflicts with a physical resource occupied by the PDCCH of the first terminal.
  • the power information of the PDCCH indicates the transmit power level information of the first terminal served by the serving base station, or the power coordination policy indicating the neighbor base station;
  • the power information of the PDCCH is in units of CCE, that is, each CCE corresponds to one power information.
  • the above method can also have the following characteristics:
  • the adjusting, by the neighboring base station, the physical resource occupied by the second terminal, is: the neighboring base station is the The second terminal reassigns the RNTI.
  • An embodiment of the present invention further provides a power coordination system for a downlink control channel, including a serving base station and a neighboring base station thereof;
  • the serving base station is configured to: send physical downlink control channel (PDCCH) information of the first terminal served by the serving base station to the neighboring base station;
  • PDCCH physical downlink control channel
  • the neighboring base station is configured to: after receiving the PDCCH information, determine that the physical resource occupied by the PDCCH of the first terminal conflicts with the physical resource occupied by the PDCCH of the second terminal in the neighboring base station; The transmission power of the second terminal or the occupied physical resources is adjusted.
  • a further embodiment of the present invention further provides a base station, including a receiving unit, a determining unit, and an adjusting unit, where:
  • the receiving unit is configured to: receive a physical downlink control channel of the first terminal sent by the neighboring base station
  • the determining unit is configured to: determine, according to the PDCCH information of the first terminal of the first terminal, that the physical resource occupied by the first terminal conflicts with the physical resource occupied by the PDCCH of the second terminal in the local base station;
  • the adjusting unit is configured to: adjust the transmit power or the occupied physical resources of the second terminal.
  • the above base station can also have the following features:
  • the PDCCH information includes time-frequency resource information occupied by the PDCCH.
  • the above base station can also have the following features:
  • the PDCCH information further includes power information for transmitting the PDCCH.
  • the above base station can also have the following features:
  • the time-frequency resource information occupied by the PDCCH includes: an Orthogonal Frequency Division Multiplexing (OFDM) symbol number occupied by the PDCCH, and a Control Channel Element (CCE) index information occupied by the PDCCH; or
  • OFDM Orthogonal Frequency Division Multiplexing
  • CCE Control Channel Element
  • the time-frequency resource information occupied by the PDCCH includes: the number of OFDM symbols occupied by the PDCCH, the radio network temporary identifier (RNTI) of the first terminal, and the aggregation level of the PDCCH.
  • RNTI radio network temporary identifier
  • the above base station can also have the following features:
  • the time-frequency resource information occupied by the PDCCH further includes quantity information of a physical hybrid retransmission indication channel (PHICH) of the serving base station.
  • PHICH physical hybrid retransmission indication channel
  • the above base station can also have the following features:
  • the determining unit is configured to: determine, according to the time-frequency resource information of the PDCCH that is received by the receiving unit, a physical resource location occupied by the PDCCH of the first terminal, and further determine a PDCCH occupation with the first terminal.
  • the second terminal of the physical resource conflicts.
  • the above base station can also have the following features:
  • the power information of the PDCCH indicates the transmission power level information of the first terminal, or the indicated power coordination policy
  • the adjusting module is further configured to: determine, according to power information of the PDCCH, a policy for performing transmission power adjustment on the second terminal.
  • the above base station can also have the following features:
  • the adjusting unit is configured to adjust physical resources occupied by the second terminal in a manner of: reallocating an RNTI for the second terminal.
  • the neighboring base station determines, according to the received PDCCH information, a terminal that has a resource conflict, and adjusts the transmission power of the conflicting terminal, so as to effectively reduce inter-cell interference, thereby not changing the UE and the eNB. Based on the interface, the receiving performance of the PDCCH is improved.
  • FIG. 1 is a schematic structural diagram of a base station according to an embodiment of the present invention.
  • FIG. 3 is a schematic diagram of resource occupancy of a PDCCH of different cells according to an embodiment of the present invention
  • FIG. 4 is a schematic diagram of power coordination of a control channel according to Embodiment 1 of the present invention
  • FIG. 5 is a schematic diagram of power coordination of a control channel according to Embodiment 2 of the present invention.
  • FIG. 6 is a schematic diagram of power coordination of a control channel according to Embodiment 3 of the present invention
  • FIG. 7 is a schematic diagram of power coordination of a control channel according to Embodiment 4 of the present invention.
  • FIG. 8 is a schematic diagram of power coordination of a control channel according to Embodiment 5 of the present invention. Preferred embodiment of the invention
  • the present invention provides a system and method for coordinating power of a downlink control channel, where a serving base station of a terminal transmits PDCCH information of the terminal to one or more neighboring base stations, and one or more neighboring base stations that receive PDCCH information according to the terminal
  • the PDCCH information determines whether the physical resource occupied by the PDCCH of the terminal conflicts with the physical resource occupied by the terminal served by the terminal. If the collision occurs, the neighboring base station adjusts the transmission power of the terminal that occupies the physical resource conflict.
  • This embodiment provides a power coordination system for a downlink control channel, including two or more base stations;
  • the serving base station of the terminal is configured to send the PDCCH information of the terminal to one or more neighboring base stations; and the one or more neighboring base stations that receive the PDCCH information are used to determine the PDCCH occupied by the PDCCH of the terminal after receiving the PDCCH information.
  • the resource is in conflict with the physical resource occupied by the terminal in the neighboring base station; and the neighboring base station is further configured to adjust the sending power or the occupied physical resource of the terminal that has the resource conflict with the terminal.
  • the PDCCH information includes time-frequency resource information occupied by the PDCCH, and may further include sending power information of the PDCCH.
  • the time-frequency resource information occupied by the PDCCH includes: the number of OFDM symbols occupied by the PDCCH,
  • the CFR index information occupied by the PDCCH; or the time-frequency resource information occupied by the PDCCH includes: the number of OFDM symbols occupied by the PDCCH, and the network temporary identifier of the terminal identifies the aggregation level of the RNTI and the PDCCH.
  • the time-frequency resource information occupied by the PDCCH may further include quantity information of the PHICH channel of the serving base station.
  • the neighboring base station determines, according to the received time-frequency resource information of the PDCCH, the physical resource location occupied by the PDCCH of the terminal of the serving base station.
  • the power information of the PDCCH indicates a transmit power level of the serving base station to its serving terminal.
  • the neighboring base station adjusts the physical resource occupied by the terminal that has the resource conflict, and the neighboring base station re-allocates the RNTI for the terminal.
  • the embodiment further provides a base station, as shown in FIG. 1, comprising a receiving unit 10, a determining unit 11 and an adjusting unit 12, wherein:
  • the receiving unit 10 is configured to: receive PDCCH information of the first terminal sent by the neighboring base station; the determining unit 11 is configured to: determine, according to the PDCCH information of the first terminal of the first terminal, that the first terminal is occupied Whether the physical resource conflicts with the physical resource occupied by the PDCCH of the second terminal in the base station;
  • the adjusting unit 12 is configured to: if the determining unit determines that there is a conflict, adjust the sending power or the occupied physical resources of the second terminal.
  • the determining unit 11 is configured to determine, according to the time-frequency resource information of the PDCCH that is received by the receiving unit, a physical resource location occupied by the PDCCH of the first terminal, and further determine the first terminal.
  • the PDCCH occupies a second terminal that conflicts with physical resources.
  • the power information of the PDCCH indicates the transmission power level information of the first terminal, or the indicated power coordination policy
  • the adjusting unit 12 may be further configured to: determine, according to power information of the PDCCH, a policy for performing transmission power adjustment on the second terminal.
  • the adjusting unit 12 is configured to adjust physical resources occupied by the second terminal in a manner of: reallocating an RNTI for the second terminal.
  • the embodiment provides a method for coordinating the power of the downlink control channel, where the serving base station of the terminal sends the PDCCH information of the terminal to the neighboring base station, and if the neighboring base station determines the REG resource occupied by the PDCCH of the terminal and the neighboring base station according to the PDCCH information of the terminal
  • the REG resource occupied by the terminal in the presence As shown in Figure 2, the method of the invention comprises the following steps:
  • Step S101 The serving base station sends the PDCCH information of the terminal to the one or more neighboring base stations.
  • the PDCCH information includes the time-frequency resource information of the PDCCH and the power information of the PDCCH.
  • the time-frequency resource information occupied by the PDCCH includes: The number of OFDM symbols, the CCE index information occupied by the PDCCH; or the time-frequency resource information occupied by the PDCCH includes: the number of OFDM symbols occupied by the PDCCH, the network temporary identifier of the terminal, and the aggregation level of the PDCCH.
  • the PDCCH transmission power information indicates transmission power level information of the serving base station to its serving terminal, or a power coordination policy indicating the neighboring base station;
  • the time-frequency resource information occupied by the PDCCH sent by the serving base station may further include
  • Step S102 The one or more neighboring base stations that receive the PDCCH information, according to the PDCCH information, determine whether the physical resource occupied by the terminal of the serving base station conflicts with the physical resource occupied by the terminal served by the neighboring base station, and if yes, perform step S103; otherwise, perform step S103; No adjustment is required, end.
  • the neighboring base station determines, according to the time-frequency resource information of the received PDCCH, the location of the physical resource (ie, the REG resource) occupied by the PDCCH of the terminal, and further determines the terminal that has the occupied resource conflict with the terminal;
  • the received PDCCH transmission power information determines an adjustment strategy for the transmission power of the conflicting terminals.
  • the neighboring base station determines the physical resource location occupied by the PDCCH according to the following manner: If the PDCCH symbol occupied by the PDCCH of the serving base station is L, usually L takes 0, 1, 2, 3, and when L>0, the PDCCH channel will Was sent. In the L OFDM symbols, in addition to the PDCCH channel, the PHICH channel and the PCFICH channel are also transmitted, but since the PCFICH fixedly occupies 4 determined REGs in the first symbol, the neighbor base station only needs to obtain the L and the serving base station.
  • the number of PHICH channels can be used to know the number of REGs (or CCEs) used to transmit the PDCCH.
  • the neighboring base station After the neighboring base station calculates the REG (or CCE) used to transmit the PDCCH, after the serving base station notifies the CCE index occupied by the PDCCH again, The physical resource location of the PDCCH is obtained, so as to determine which UEs in the UE served by the neighboring base station have a resource conflict with the PDCCH in the serving base station.
  • the PDCCH transmission power information is generated in units of CCEs, that is, each CCE corresponds to one power information.
  • Step S103 The neighboring base station adjusts the sending power of the terminal that occupies the resource conflict or the occupied physical resource.
  • the neighboring base station may adjust the transmit power of the terminal that occupies the resource conflict according to the indication of the PDCCH transmit power.
  • the adjustment of the physical resources occupied by the neighboring base station to the terminal occupying the physical resource conflict means that the neighboring base station re-allocates the RNTI for the terminal.
  • a part of a mobile communication network including seven base stations Cell O, Cell 1, Cell 2, Cell 3, Cell 4, Cell 5, Cell 6, and part of mobile terminals UE: UEO, UE1, UE2 And UE3, where the serving base stations of UEO and UE1 are Cell 0, and the serving base stations of UE2 and UE3 are Cell 2.
  • the PDCCH aggregation level 2 of UE0 occupies 2 logical CCEs
  • the PDCCH aggregation level 4 of UE1 occupies 4 logical CCEs
  • the PDCCH aggregation level 2 of UE2 occupies 2 logical CCEs
  • the PDCCH aggregation level 2 of UE3 occupies 2 logical CCEs.
  • the cell 0 may determine the transmit power on the PDCCH of the UE0 according to the channel condition of the UE 0, for example, the channel quality fed back by the UE0, and include the time-frequency resource information and the PDCCH occupied by the PDCCH according to the PDCCH information of the UE0.
  • the PDCCH information of the PDCCH generates PDCCH information that is sent to the neighboring base station.
  • the cell 0 may send the CCE index occupied by the PDCCH of the UE 0 and the PDCCH transmission power information to the base stations Cell 1 , Cell 2 , Cell 3 , and Cell 6.
  • the PDCCH transmission power information is generated in units of CCEs, that is, the two CCEs occupied by the PDCCH of UE0 will correspond to 2*n bits of transmission power information, and each CCE corresponds to n bits, and the determination of n depends on Cell 0 hope.
  • Notifying the neighbor base station of the level of detail of the PDCCH transmission power of UE 0 and the complexity of the policy of Cell 0 negotiating with the power of the neighbor base station. For example, taking the level of detail indicating the transmission power as an example, n 1 bit, it can represent two transmission power states, one indicates that UE0 will transmit PDCCH with higher power in the future, and the other indicates that UE0 will be used in the future.
  • the transmission power of the neighboring base station is lowered, and when it is equal to 1, it means that the transmission power can be appropriately increased.
  • the cell 0 sends the PDCCH information of the UE0 to the neighboring base station, and the neighboring base station 2 determines, according to the received PDCCH information, that the REG in the CCE occupied by the PDCCH of the UE2 conflicts with the REG resource in the CCE occupied by the PDCCH of the UE0.
  • the base station 2 adjusts the PDCCH transmission power of the UE2 based on the PDCCH receiving quality of the UE2, for example, reduces the transmission power, thereby reducing the neighboring area of the PDCCH of the UE0, thereby improving the PDCCH of the UE0. Receive quality.
  • Embodiment 2 is a diagrammatic representation of Embodiment 1:
  • FIG. 4 is a schematic diagram of power coordination of a control channel according to Embodiment 2 of the present invention.
  • the difference in power coordination with FIG. 3 is that Cell 2 determines that the REGs in the CCEs occupied by the PDCCHs of UE2 and UE3 are both REGs in the CCEs occupied by the PDCCH of UE0 according to the PDCCH information transmitted by the Cell 0.
  • the resources are in conflict, and the PDCCH transmit power of UE2 and UE3 are adjusted.
  • a cell After receiving the PDCCH information sent by other cells, a cell can adjust the transmit power of the PDCCH of one or more UEs.
  • Embodiment 3 is a diagrammatic representation of Embodiment 3
  • FIG. 5 is a schematic diagram of power coordination of a control channel according to Embodiment 3 of the present invention.
  • the difference in power coordination with that in FIG. 3 and FIG. 4 is that Cell 1 also determines the REG in the CCE occupied by the PDCCH of UE7 according to the received PDCCH information sent by Cell 0. The transmit power has been adjusted.
  • one or more of the multiple cells may adjust the transmit power of the PDCCH of the serving UE, or the Cell that receives the PDCCH information may not Make adjustments.
  • Embodiment 4 is a diagrammatic representation of Embodiment 4:
  • FIG. 6 is a schematic diagram of power coordination of a control channel according to Embodiment 4 of the present invention.
  • Cell 0 transmits the PDCCH information of UE 0 and UE1 to the neighbor cell, and the UE0
  • the PDCCH information and the PDCCH information of UE1 are transmitted to different neighbor cells. Specifically, the PDCCH information of UE0 is sent to Cell 5, Cell6, and the PDCCH information of UE1 is sent to Cell 1, Cell 2 and Cell 3. among them,
  • the Cell 2 determines that the REG in the CCE occupied by the PDCCH of the UE2 conflicts with the resource of the REG in the CCE occupied by the PDCCH of the UE1 according to the PDCCH information of the UE1 that is sent by the Cell 0, and the transmission power of the UE 2 PDCCH is made. Adjustment.
  • the Cell 1 also determines that the REG in the CCE occupied by the PDCCH of the UE8 conflicts with the resource of the REG in the CCE occupied by the PDCCH of the UE1 according to the PDCCH information of the UE1 that is sent by the Cell 0, and the PDCCH transmission power of the UE 8 is both Made adjustments.
  • the Cell 5 also determines that the REG of the CCE occupied by the PDCCH of the UE5 conflicts with the resource of the REG of the CCE occupied by the PDCCH of the UE 0 according to the PDCCH information of the UE0 that is sent by the Cell 0, and the PDCCH transmission power of the UE5 is both Adjustment.
  • the Cell may send the PDCCH of one or more UEs to the cell, and the neighboring cell adjusts the transmit power of the PDCCH of the serving UE according to the PDCCH channel condition of the UE it serves.
  • FIG. 7 is a schematic diagram of power coordination of a control channel according to Embodiment 5 of the present invention.
  • the PDCCH information of the UE 0 and the UE1 is sent to the neighboring cell, and the PDCCH information of the UE0 and the PDCCH information of the UE1 are sent to different neighboring cells, and one of the cells receives the PDCCH information of the multiple UEs.
  • the PDCCH information of UE0 is sent to Cell1, Cell5, and Cell6, and the PDCCH information of UE1 is sent to Cell1, Cell2, and Cell3.
  • the Cell 1 receives the PDCCH information of UE 0 and UE1.
  • the Celll also determines that the REG in the CCE occupied by the PDCCH of the UE7 and the UE8 conflicts with the REG resource in the CCE occupied by the PDCCH of the UE1 and the UE1 according to the PDCCH information of the UE0 and the UE1 transmitted by the Cell 0, and the UE7 and the UE are in conflict with the REG resources in the CCE occupied by the PDCCH of the UE1.
  • the PDCCH transmission power of 8 is adjusted.
  • the Cell may send the PDCCH of one or more UEs to the same neighboring cell, and the neighboring cell adjusts the transmit power of the PDCCH of the serving UE according to the PDCCH channel condition of the UE served by the neighboring cell.
  • the neighboring base station may adjust the PDCCH physical resource location of the UE it serves, for example, by reallocating to the UE-RNTI. Because the resource location of the PDCCH is related to the RNTI.
  • the Cell in the present invention may be a wireless coverage area of a device such as a base station, a home base station, or a relay station.
  • the UE is configured to receive the data signal of the transmitting end, and may be a terminal device such as a mobile phone, a notebook computer, a handheld computer, or a control device such as a relay station.
  • the neighboring base station determines, according to the received PDCCH information, the terminal that has the resource conflict, and adjusts the transmission power of the conflicting terminal, which can effectively reduce the interference between the cells, thereby improving the interface between the UE and the eNB. Receive performance of PDCCH.

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Abstract

一种下行控制信道的功率的协调方法、系统和基站，该方法包括：第一终端的服务基站向邻基站发送所述第一终端的物理下行控制信道（PDCCH）信息，收到PDCCH信息的邻基站根据所述第一终端的PDCCH信息判断出所述第一终端的PDCCH占用的物理资源与所述邻基站服务的第二终端的PDCCH占用的物理资源冲突，则所述邻基站调整所述第二终端的发送功率或调整所述第二终端占用的物理资源。

Description

一种下行控制信道的功率的协调系统、 方法及基站
技术领域
本发明涉及通信领域， 尤其涉及下行控制信道的功率协调系统、 方法及 基站。
背景技术
随着无线通信技术的快速发展， 有限的频谱资源逐渐成为制约无线通信 发展的主要因素， 但正是有限的频谱资源激发了新技术的出现。 在无线通信 系统中容量和覆盖是两个重要的性能指标， 为了增加容量， 多釆用同频方式 组网， 但同频方式组网又增加了小区间干扰， 从而导致覆盖性能下降。
在长期演进系统（ Long Term Evolution , LTE ) 系统中， 下行釆用了正交 频分复用多址接入 ( Orthogonal Frequency Division Multiplexing Access , OFDMA )技术， 能够显著降低小区内的干扰， 但由于多釆用同频方式组网， 小区间干扰（ Inter-Cell Interference, ICI )增加明显。 为了降低 ICI, LTE也 标准化了很多技术， 例如下行小区间干扰消除 （ Inter-Cell Interfernce Cancellation, ICIC )。下行 ICIC技术基于 eNodeB相对窄带发射功率（ Relative Narrowband TX Power, RNTP ) 限制的方法实现下行干扰预先提醒功能， 但 该方法只 能用 于物理下行业务信道 ( Physical Downlink Shared Channel,PDSCH ) 。
目前， 通过实验网络测试和仿真可以发现， 物理下行控制信道（Physical Downlink Control Channel, PDCCH )的容量和覆盖都存在问题， 因为 PDCCH 信道对剩余的控制信道单元 （Control Channel Element , CCE ) 实行填充 ( Padding ) , 造成在同频组网下 PDCCH信道总处在满载状态， 而且受到相 邻小区的干扰很大， 从而降低 PDCCH的接收性能。 而上， 下行共享信道的 调度信息等信息均通过 PDCCH承载，如果 PDCCH的接收性能降低，那么整 网的性能将严重降低。
PDCCH用于承载终端（ User Equipment, UE )的下行控制信息（ Downlink Control Information, DCI ) , 具体包括上行调度信息， 下行调度信息， 功率控 制信息， 公共信息等， 并支持多种 DCI格式。 DCI的生成过程包括信息比特 通过循环冗余校验， 编码， 子块交织， 速率匹配， 加扰， 调制等步骤， 最后 映射到物理资源粒子组（Resource Element Group, REG )上。 UE通过网络为 UE分配的无线网络临时标识（ Radio Network Temporary Identifier, RNTI )来 识别其 PDCCH。 为了提高 PDCCH的效率， LTE系统定了四种聚合等级传输 PDCCH, 四种等级分别为 1 , 2, 4, 8个 CCE, 显然， 等级越高， 传输一个 PDCCH信道所需资源越多， 覆盖可能越稳健， 但效率越低。 目前， 为了提高 PDCCH的接收性能， 同时提高 PDCCH的资源使用效率， eNB对各 UE的 PDCCH进行等功率分配， 即除去物理控制格式指示信道（Physical Control Format Indication Channel, PCFICH )和物理混合重传指示信道（ Physical HARQ Indication Channel, PHICH ) 占用的功率外， 剩余功率等分给 PDCCH占用的 各个 CCE或 REG,而根据 UE的 DCI信息的长度和信道条件选择合适的 DCI 格式和聚合等级， 这种方法的问题在于不能降低同频干扰的问题。 另外也有 根据 UE的接收信噪比的反馈来调节 PDCCH的发送功率，但仍然无法协调小 区间的干扰。
因此， 在已有的技术中， 还未发现能够比较好的解决 PDCCH的小区间 干扰的避免问题的方法。 发明内容
本发明实施例提出一种下行控制信道的功率的协调系统、 方法及基站， 能够降低小区间的干扰， 从而在不改变 UE与 eNB之间的接口的基础上， 提 升 PDCCH的接收性能。
本发明实施例提供一种下行控制信道的功率的协调方法， 包括： 第一终端的服务基站向邻基站发送所述第一终端的物理下行控制信道
( PDCCH )信息， 收到 PDCCH信息的邻基站根据所述第一终端的 PDCCH 信息判断出所述第一终端的 PDCCH 占用的物理资源与所述邻基站服务的第 二终端的 PDCCH 占用的物理资源冲突， 则所述邻基站调整所述第二终端的 发送功率或调整所述第二终端占用的物理资源。 上述方法还可具有以下特点：
所述 PDCCH信息包括 PDCCH占用的时频资源信息。
上述方法还可具有以下特点：
所述 PDCCH信息还包括发送 PDCCH的功率信息。
上述方法还可具有以下特点：
所述 PDCCH 占用的时频资源信息包括： PDCCH 占用的正交频分复用 ( OFDM )符号数， 以及 PDCCH占用的控制信道单元（CCE )索引信息； 或 者，
所述 PDCCH占用的时频资源信息包括： PDCCH占用的 OFDM符号数， 所述第一终端的无线网络临时标识 ( RNTI )和 PDCCH的聚合等级。
上述方法还可具有以下特点：
所述 PDCCH 占用的时频资源信息还包括： 所述服务基站的物理混合重 传指示信道（PHICH ) 的数量信息。
上述方法还可具有以下特点：
所述邻基站判断出所述第一终端的 PDCCH 占用的物理资源与所述邻基 站服务的第二终端占用的物理资源冲突的的步骤包括： 所述邻基站根据所述 PDCCH占用的时频资源信息确定所述第一终端的 PDCCH占用的物理资源位 置， 进而确定与所述第一终端的 PDCCH占用的物理资源相冲突的第二终端。
上述方法还可具有以下特点：
所述 PDCCH的功率信息表示服务基站对其服务的第一终端的发送功率 等级信息， 或指示邻基站的功率协调策略；
所述邻基站根据 PDCCH的功率信息确定对所述第二终端进行发送功率 调整的策略。
上述方法还可具有以下特点：
所述 PDCCH的功率信息以 CCE为单位，即每个 CCE对应一个功率信息。 上述方法还可具有以下特点：
所述邻基站调整所述第二终端占用的物理资源是指： 所述邻基站为所述 第二终端重新分配 RNTI。 本发明实施例还提供了一种下行控制信道的功率的协调系统， 包括服务 基站和其邻基站；
所述服务基站设置为： 向所述邻基站发送所述所述服务基站服务的第一 终端的物理下行控制信道（PDCCH )信息；
所述邻基站设置为： 收到所述 PDCCH信息后判断出所述第一终端的 PDCCH占用的物理资源与所述邻基站中的第二终端的 PDCCH占用的物理资 源存在冲突； 则对所述第二终端的发送功率或占用的物理资源作出调整。
本发明还实施例还提供了一种基站， 包括接收单元、 判断单元和调整单 元， 其中：
所述接收单元设置为： 接收邻基站发送的第一终端的物理下行控制信道
( PDCCH )信息；
所述判断单元设置为： 根据所述第一终端的所述第一终端的 PDCCH信 息判断出所述第一终端占用的物理资源与本基站中的第二终端的 PDCCH 占 用的物理资源存在冲突；
所述调整单元设置为： 对所述第二终端的发送功率或占用的物理资源作 出调整。
上述基站还可具有以下特点：
所述 PDCCH信息包括 PDCCH占用的时频资源信息。
上述基站还可具有以下特点：
所述 PDCCH信息还包括发送 PDCCH的功率信息。
上述基站还可具有以下特点：
所述 PDCCH 占用的时频资源信息包括： PDCCH 占用的正交频分复用 ( OFDM )符号数， 以及 PDCCH占用的控制信道单元（CCE )索引信息； 或 者，
所述 PDCCH占用的时频资源信息包括： PDCCH占用的 OFDM符号数， 所述第一终端的无线网络临时标识（RNTI )和 PDCCH的聚合等级。 上述基站还可具有以下特点：
所述 PDCCH 占用的时频资源信息还包括所述服务基站的物理混合重传 指示信道（PHICH ) 的数量信息。
上述基站还可具有以下特点：
所述判断单元是设置为： 根据所述接收单元收到的所述 PDCCH 占用的 时频资源信息确定所述第一终端的 PDCCH 占用的物理资源位置， 进而确定 与所述第一终端的 PDCCH占用的物理资源相冲突的第二终端。
上述基站还可具有以下特点：
所述 PDCCH的功率信息表示所述第一终端的发送功率等级信息， 或指 示的功率协调策略；
所述调整模块还设置为： 根据 PDCCH的功率信息确定对所述第二终端 进行发送功率调整的策略。
上述基站还可具有以下特点：
所述调整单元是设置为以如下方式对所述第二终端占用的物理资源进行 调整： 为所述第二终端重新分配 RNTI。
根据上述方法、 系统及基站， 邻基站根据接收的 PDCCH信息确定存在 资源冲突的终端， 并对该冲突的终端的发送功率进行调整， 可有效降低小区 间的干扰， 从而在不改变 UE与 eNB之间的接口的基础上， 提升 PDCCH的 接收性能。 附图概述
图 1为本发明实施例中的基站的结构示意图；
图 2为本发明方法实施例流程图；
图 3为本发明实施例中不同小区的 PDCCH的资源占用示意图； 图 4为本发明实施例一中控制信道的功率协调示意图；
图 5为本发明实施例二中控制信道的功率协调示意图；
图 6为本发明实施例三中控制信道的功率协调示意图； 图 7为本发明实施例四中控制信道的功率协调示意图；
图 8为本发明实施例五中控制信道的功率协调示意图。 本发明的较佳实施方式
本发明提供一种下行控制信道的功率的协调系统及方法， 终端的服务基 站向一个或多个邻基站发送所述终端的 PDCCH信息，收到 PDCCH信息的一 个或多个邻基站根据所述终端的 PDCCH信息判断所述终端的 PDCCH占用的 物理资源与其服务的终端占用的物理资源是否冲突， 若冲突则所述邻基站对 占用物理资源冲突的终端的发送功率进行调整。
产品实施例
本实施例提供一种下行控制信道的功率的协调系统， 包括两个或多个基 站；
终端的服务基站用于向一个或多个邻基站发送所述终端的 PDCCH信息； 收到所述 PDCCH信息的一个或多个邻基站用于收到 PDCCH信息后判断 所述终端的 PDCCH 占用的物理资源与所述邻基站中的终端占用的物理资源 是否存在冲突； 所述邻基站还用于对其服务的与所述终端存在资源冲突的终 端的发送功率或占用的物理资源作出调整。
可选地， PDCCH信息包括 PDCCH占用的时频资源信息， 还可以包括发 送 PDCCH的功率信息。
PDCCH 占用的时频资源信息包括： PDCCH 占用的 OFDM符号数，
PDCCH 占用的 CCE索引信息； 或者， PDCCH 占用的时频资源信息包括： PDCCH占用的 OFDM符号数，所述终端的网络临时标识 RNTI和 PDCCH的 聚合等级。
可选地， PDCCH占用的时频资源信息还可以包括服务基站的 PHICH信 道的数量信息。
可选地， 邻基站根据收到的所述 PDCCH 占用的时频资源信息确定所述 服务基站的终端的 PDCCH占用的物理资源位置。
可选地， PDCCH的功率信息表示服务基站对其服务终端的发送功率等级 信息， 或指示邻基站的功率协调策略。
可选地， 邻基站对存在资源冲突的终端占用的物理资源进行调整是指： 邻基站为该终端重新分配 RNTI。
本实施例还提供一种基站， 如图 1所示， 包括接收单元 10、 判断单元 11 和调整单元 12, 其中：
所述接收单元 10设置为： 接收邻基站发送的第一终端的 PDCCH信息； 所述判断单元 11设置为： 根据所述第一终端的所述第一终端的 PDCCH 信息判断所述第一终端占用的物理资源与本基站中的第二终端的 PDCCH 占 用的物理资源是否存在冲突；
所述调整单元 12设置为： 若所述判断单元判断存在冲突， 对所述第二终 端的发送功率或占用的物理资源作出调整。
其中，所述判断单元 11是设置为：根据所述接收单元收到的所述 PDCCH 占用的时频资源信息确定所述第一终端的 PDCCH 占用的物理资源位置， 进 而确定与所述第一终端的 PDCCH占用的物理资源相冲突的第二终端。
所述 PDCCH的功率信息表示所述第一终端的发送功率等级信息， 或指 示的功率协调策略；
所述调整单元 12还可设置为： 根据 PDCCH的功率信息确定对所述第二 终端进行发送功率调整的策略。
所述调整单元 12 是设置为以如下方式对所述第二终端占用的物理资源 进行调整： 为所述第二终端重新分配 RNTI。
方法实施例
本实施例提供一种下行控制信道的功率的协调方法， 终端的服务基站向 邻基站发送终端的 PDCCH信息 ,若邻基站根据该终端的 PDCCH信息确定所 述终端的 PDCCH占用的 REG资源与邻基站中的终端占用的 REG资源存在 如图 2所示， 本发明方法包括以下步骤：
步骤 S101 : 服务基站向一个或多个邻基站发送终端的 PDCCH信息； 该 PDCCH信息包括 PDCCH占用的时频资源信息和发送 PDCCH的功率 信息； 其中， PDCCH占用的时频资源信息包括： PDCCH占用的 OFDM符号 数， PDCCH占用的 CCE索引信息；或者， PDCCH占用的时频资源信息包括： PDCCH占用的 OFDM符号数，终端的网络临时标识 RNTI和 PDCCH的聚合 等级。
PDCCH发送功率信息表示服务基站对其服务终端的发送功率等级信息， 或指示邻基站的功率协调策略；
该步骤中， 服务基站发送的 PDCCH 占用的时频资源信息还可以包括
PHICH信道的数量信息；当服务基站与邻基站占用的 PHICH信道的数量相同 时， PDCCH占用的时频资源信息可以不包括 PHICH信道的数量信息。
步骤 S102: 收到上述 PDCCH信息的一个或多个邻基站根据该 PDCCH 信息判断服务基站的终端占用的物理资源与该邻基站服务的终端占用的物理 资源是否冲突， 若冲突则执行步骤 S103 , 否则不需要调整， 结束。
具体地， 邻基站根据收到的 PDCCH 占用的时频资源信息确定所述终端 的 PDCCH占用的物理资源 （即 REG资源 )位置， 并进而确定与该终端存在 占用资源冲突的终端； 邻基站还根据接收的 PDCCH发送功率信息确定对相 冲突的终端的发送功率的调整策略。
该步骤中， 邻基站根据以下方式确定 PDCCH占用的物理资源位置： 若服务基站的 PDCCH占用的 OFDM符号数为 L, 通常 L取 0, 1 , 2, 3 , 当 L>0时， PDCCH信道将被发送。 在 L个 OFDM符号内， 除了 PDCCH信 道外， 还将发送 PHICH信道和 PCFICH信道， 但由于 PCFICH固定地占用第 一个符号中 4个确定的 REG, 所以， 邻基站只需获得服务基站的 L和 PHICH 信道数量即可知道剩余的用于传输 PDCCH 的 REG (或 CCE )数量， 当邻基 站计算出用于传输 PDCCH的 REG(或 CCE )后，当服务基站再通知了 PDCCH 占用的 CCE索引后， 即可得到 PDCCH的物理资源位置， 从而判断邻基站自 身服务的 UE中哪些 UE与服务基站中的 PDCCH存在资源冲突。 PDCCH发送功率信息的生成以 CCE为单位， 即每个 CCE对应一个功率 信息。
步骤 S103： 邻基站对占用资源冲突的终端的发送功率或是占用的物理资 源进行调整。
该步骤中， 邻基站可根据 PDCCH发送功率的指示对占用资源冲突的终 端的发送功率进行调整。
其中， 邻基站对占用物理资源冲突的终端所占用的物理资源进行调整是 指： 邻基站为该终端重新分配 RNTI。
实施例一
如图 2所示包含了一个移动通信网络的局部， 包括 7个基站 Cell O, Cell 1 , Cell 2, Cell 3 , Cell 4, Cell 5 , Cell 6, 和部分移动终端 UE: UEO, UE1 , UE2和 UE3 , 其中 UEO和 UE1的服务基站为 Cell 0, 而 UE2和 UE3的服务 基站为 Cell 2。
根据图 1所示， UE0的 PDCCH聚合等级 2, 占用 2个逻辑的 CCE, UE1 的 PDCCH聚合等级 4 , 占用 4个逻辑的 CCE。 UE2的 PDCCH聚合等级 2 , 占用 2个逻辑的 CCE, UE3的 PDCCH聚合等级 2, 占用 2个逻辑的 CCE。 在 PDCCH的功率协调上， Cell 0可根据 UE 0的信道条件， 例如 UE0反馈的 信道质量来确定 UE0的 PDCCH上的发送功率，并根据 UE0的 PDCCH信息， 包括 PDCCH占用的时频资源信息和发送 PDCCH的功率信息生成向邻基站发 送的 PDCCH信息 ,例如： Cell 0可将 UE 0的 PDCCH占用的 CCE索引， PDCCH 发送功率信息发送给部基站 Cell 1 , Cell2, Cell 3和 Cell 6。
本实施例中， PDCCH发送功率信息的生成以 CCE为单位， 即 UE0的 PDCCH占用的 2个 CCE将对应 2*n比特发送功率信息， 每个 CCE对应 n比 特， n的确定取决于 Cell 0希望向邻基站通知 UE 0的 PDCCH发送功率的详 细程度和 Cell 0与邻基站的功率协商的策略的复杂度。 例如： 以表示发送功 率的详细程度为例， n=l 比特， 则可表示两个发送功率状态， 一个表示 UE0 在未来将釆用较高功率发送 PDCCH, 另一个表示 UE0在未来将釆用较低功 率发送 PDCCH; n=2比特， 则可以表示 4个发送功率状态， 状态可以用相对 模糊的表示， 例如较高， 高， 较低， 低， 或者与某个功率门限相对应， 例如， PI , P2, P3 , 00表示小于等于 P1 , 01表示大于 P1但小于等于 P2, 01表示 大于 P2但小于等于 P3 , 11表示大于 P3 , 相似方法不再赘述。
此外， 以表示 Cell O与邻基站的功率协商的策略为例， n=l比特， 则可表 示两个功率协调策略，等于 0表示 Cell 0希望邻基站尽可能在 UE0占用的 CCE 的 REG上发送 PDCCH时降低邻基站的发送功率， 等于 1时表示可以适当提 高发送功率。
结合图 1的方法， 图 3中给出了具体的示意图。 Cell 0将 UE0的 PDCCH 信息发给了邻基站， 其中邻基站 2根据收到的 PDCCH信息确定了 UE2 的 PDCCH占用的 CCE中的 REG与 UE0的 PDCCH占用的 CCE中的 REG的资 源存在冲突， 邻基站 2在保证 UE2的 PDCCH的接收质量基础上， 对 UE2的 PDCCH发送功率做了调整， 例如降低了发送功率， 因此降低了对 UE0 的 PDCCH的邻区干 4尤， 从而提升了 UE0的 PDCCH的接收质量。
实施例二：
图 4为本发明实施例二中控制信道的功率协调示意图；
该实施例中， 与图 3中的功率协调的差别在于 Cell 2根据收到 Cell 0发 送的 PDCCH信息确定了 UE2和 UE3的 PDCCH占用的 CCE中的 REG都与 UE0的 PDCCH占用的 CCE中的 REG的资源存在冲突，并对 UE2和 UE3的 PDCCH发送功率均作了调整。
说明： 某个 Cell收到了其它 Cell发送的 PDCCH信息后， 可以对一个或 多个 UE的 PDCCH的发送功率作出调整， 也可以不做调整。
实施例三：
图 5为本发明实施例三中控制信道的功率协调示意图；
该实施例中， 与图 3和图 4中的功率协调的差别在于 Cell 1也才艮据收到 Cell 0发送的 PDCCH信息确定了 UE7的 PDCCH占用的 CCE中的 REG与 发送功率均作了调整。
说明： 当多个 Cell收到了某个 Cell发送的 PDCCH信息后， 多个 Cell 中的一个或多个 Cell可以对服务的 UE的 PDCCH的发送功率作出调整， 也 可以收到 PDCCH信息的 Cell均不做调整。
实施例四：
图 6为本发明实施例四中控制信道的功率协调示意图；
该实施例中， 与图 3和图 4和图 5中的功率协调的差别在于
Cell 0中将 UE 0和 UEl的 PDCCH信息发送给了邻 Cell ,并且将 UE0的
PDCCH信息和 UE1的 PDCCH信息发送给了不同的邻 Cell。具体地，将 UE0 的 PDCCH信息发送给了 Cell 5, Cell6, 而将 UEl的 PDCCH信息发给了 Cell 1 , Cell 2和 Cell 3。 其中，
Cell 2根据收到 Cell 0发送的 UE1的 PDCCH信息确定了 UE2的 PDCCH 占用的 CCE中的 REG与 UE 1的 PDCCH占用的 CCE中的 REG的资源存在 冲突， 并对 UE 2 PDCCH发送功率均作了调整。
Cell 1 也根据收到 Cell 0发送的 UE1 的 PDCCH信息确定了 UE8 的 PDCCH占用的 CCE中的 REG与 UE 1的 PDCCH占用的 CCE中的 REG的 资源存在冲突， 并对 UE 8的 PDCCH发送功率均作了调整。
而，
Cell 5也根据收到 Cell 0发送的 UE0 的 PDCCH信息确定了 UE5 的 PDCCH占用的 CCE中的 REG与 UE 0的 PDCCH占用的 CCE中的 REG的 资源存在冲突， 并对 UE5的 PDCCH发送功率均作了调整。
说明： Cell可将一个或多个 UE的 PDCCH发给部 Cell, 邻 Cell根据其服 务的 UE的 PDCCH信道状况对服务的 UE的 PDCCH的发送功率作出调整。
实施例五: 图 7为本发明实施例五中控制信道的功率协调示意图；
该实施例中， 与图 3 , 图 4, 图 5和图 6中的功率协调的差别在于：
Cell 0中将 UE 0和 UEl的 PDCCH信息发送给了邻 Cell,并且将 UE0的 PDCCH信息和 UE1的 PDCCH信息发送给了不同的邻 Cell,且其中一个 Cell 收到了多个 UE的 PDCCH信息。 具体地， 将 UE0的 PDCCH信息发送给了 Celll , Cell 5 , Cell6,而将 UEl的 PDCCH信息发给了 Cell 1 , Cell 2和 Cell 3。 其中， Cell 1收到了 UE 0和 UEl的 PDCCH信息。 并且：
Celll也根据收到 Cell 0发送的 UE0和 UE1的 PDCCH信息确定了 UE7 和 UE8的 PDCCH占用的 CCE中的 REG与 UE0和 UE 1的 PDCCH占用的 CCE中的 REG资源存在冲突， 并对 UE7和 UE 8的 PDCCH发送功率均作了 调整。
说明： Cell可将一个或多个 UE的 PDCCH发给同一个邻 Cell, 邻 Cell 根据其服务的 UE的 PDCCH信道状况对服务的 UE的 PDCCH的发送功率作 出调整。
在各个实施例中，在服务基站和邻基站发生 REG资源冲突时， 除了进行 功率调整外，邻基站可以调整其服务的 UE的 PDCCH物理资源位置，例如通 过重新分配给 UE—个 RNTI来实现，因为 PDCCH的资源位置与 RNTI有关。
本发明中的 Cell可以是基站、 家庭基站、 中继站等设备的无线覆盖区域。 类似地， UE用于接收发送端的数据信号， 可以是手机、 笔记本电脑、 手持电 脑等终端设备， 也可以是中继站等控制设备。
以上所述， 仅为本发明的较佳实施例而已， 并非用于限定本发明的保护 范围， 凡在本发明的精神和原则之内所作的任何修改、 等同替换和改进等， 均应包含在本发明的保护范围之内。
工业实用性
邻基站根据接收的 PDCCH信息确定存在资源冲突的终端， 并对该冲突 的终端的发送功率进行调整， 可有效降低小区间的干扰， 从而在不改变 UE 与 eNB之间的接口的基础上， 提升 PDCCH的接收性能。

Claims

权 利 要 求 书
1、 一种下行控制信道的功率的协调方法， 包括：
第一终端的服务基站向邻基站发送所述第一终端的物理下行控制信道
( PDCCH )信息， 收到 PDCCH信息的邻基站根据所述第一终端的 PDCCH 信息判断出所述第一终端的 PDCCH 占用的物理资源与所述邻基站服务的第 二终端的 PDCCH 占用的物理资源冲突， 则所述邻基站调整所述第二终端的 发送功率或调整所述第二终端占用的物理资源。
2、 如权利要求 1所述的方法， 其中：
所述 PDCCH信息包括 PDCCH占用的时频资源信息。
3、 如权利要求 2所述的方法， 其中：
所述 PDCCH信息还包括发送 PDCCH的功率信息。
4、 如权利要求 2所述的方法， 其中：
所述 PDCCH 占用的时频资源信息包括： PDCCH 占用的正交频分复用 ( OFDM )符号数， 以及 PDCCH占用的控制信道单元（CCE )索引信息； 或 者，
所述 PDCCH占用的时频资源信息包括： PDCCH占用的 OFDM符号数， 所述第一终端的无线网络临时标识（RNTI )和 PDCCH的聚合等级。
5、 如权利要求 4所述的方法， 其中：
所述 PDCCH 占用的时频资源信息还包括： 所述服务基站的物理混合重 传指示信道 ( PHICH ) 的数量信息。
6、 如权利要求 4或 5所述的方法， 其中：
所述邻基站判断出所述第一终端的 PDCCH 占用的物理资源与所述邻基 站服务的第二终端占用的物理资源冲突的的步骤包括： 所述邻基站根据所述 PDCCH占用的时频资源信息确定所述第一终端的 PDCCH占用的物理资源位 置， 进而确定与所述第一终端的 PDCCH占用的物理资源相冲突的第二终端。
7、 如权利要求 3所述的方法， 其还包括：
所述 PDCCH的功率信息表示服务基站对其服务的第一终端的发送功率 等级信息， 或指示邻基站的功率协调策略；
所述邻基站根据 PDCCH的功率信息确定对所述第二终端进行发送功率 调整的策略。
8、 如权利要求 7所述的方法， 其中：
所述 PDCCH的功率信息以 CCE为单位，即每个 CCE对应一个功率信息。
9、 如权利要求 2所述的方法， 其中：
所述邻基站调整所述第二终端占用的物理资源是指： 所述邻基站为所述 第二终端重新分配 RNTI。
10、 一种下行控制信道的功率的协调系统， 包括服务基站和其邻基站； 所述服务基站设置为： 向所述邻基站发送所述所述服务基站服务的第一 终端的物理下行控制信道（PDCCH )信息；
所述邻基站设置为： 收到所述 PDCCH信息后判断出所述第一终端的 PDCCH占用的物理资源与所述邻基站中的第二终端的 PDCCH占用的物理资 源存在冲突； 则对所述第二终端的发送功率或占用的物理资源作出调整。
11、 一种基站， 包括接收单元、 判断单元和调整单元， 其中：
所述接收单元设置为： 接收邻基站发送的第一终端的物理下行控制信道 ( PDCCH )信息；
所述判断单元设置为： 根据所述第一终端的所述第一终端的 PDCCH信 息判断出所述第一终端占用的物理资源与本基站中的第二终端的 PDCCH 占 用的物理资源存在冲突；
所述调整单元设置为： 对所述第二终端的发送功率或占用的物理资源作 出调整。
12、 如权利要求 11所述的基站， 其中：
所述 PDCCH信息包括 PDCCH占用的时频资源信息。
13、 如权利要求 12所述的基站， 其中：
所述 PDCCH信息还包括发送 PDCCH的功率信息。
14、 如权利要求 13所述的基站， 其中： 所述 PDCCH 占用的时频资源信息包括： PDCCH 占用的正交频分复用 ( OFDM )符号数， 以及 PDCCH占用的控制信道单元（CCE )索引信息； 或 者，
所述 PDCCH占用的时频资源信息包括： PDCCH占用的 OFDM符号数， 所述第一终端的无线网络临时标识 ( RNTI )和 PDCCH的聚合等级。
15、 如权利要求 14所述的基站， 其中：
所述 PDCCH 占用的时频资源信息还包括所述服务基站的物理混合重传 指示信道（PHICH ) 的数量信息。
16、 如权利要求 14或 15所述的基站， 其中：
所述判断单元是设置为： 根据所述接收单元收到的所述 PDCCH 占用的 时频资源信息确定所述第一终端的 PDCCH 占用的物理资源位置， 进而确定 与所述第一终端的 PDCCH占用的物理资源相冲突的第二终端。
17、 如权利要求 13所述的基站， 其中：
所述 PDCCH的功率信息表示所述第一终端的发送功率等级信息， 或指 示的功率协调策略；
所述调整模块还设置为： 根据 PDCCH的功率信息确定对所述第二终端 进行发送功率调整的策略。
18、 如权利要求 12所述的基站， 其中：
所述调整单元是设置为以如下方式对所述第二终端占用的物理资源进行 调整： 为所述第二终端重新分配 RNTI。
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