CN104335653A

CN104335653A - Method for sharing wireless resource information in multi-cell wireless communication system and apparatus for same

Info

Publication number: CN104335653A
Application number: CN201380026805.7A
Authority: CN
Inventors: 李承旻; 徐翰瞥; 金学成; 金炳勋
Original assignee: LG Electronics Inc
Current assignee: LG Electronics Inc
Priority date: 2012-05-21
Filing date: 2013-05-21
Publication date: 2015-02-04
Anticipated expiration: 2033-05-21
Also published as: WO2013176466A1; CN104335653B; KR20150020559A; KR102108070B1

Abstract

The present invention relates to a method for sharing wireless resource information by a cell in a multi-cell wireless communication system. More particularly, the method for sharing wireless resource information by a cell according to the present invention comprises: a step of transmitting wireless resource information to a neighbor cell; and a step of receiving an acknowledgement message corresponding to the wireless resource information from the neighbor cell. The wireless resource information is information for changing the use of the wireless resource of a specific wireless resource region, and the acknowledgement message is a message indicating whether the change in use of the wireless resource is allowed in the neighbor cell.

Description

Method and the equipment thereof of wireless resource information is shared in multi-cell wireless communication system

Technical field

The present invention relates to a kind of wireless communication system, and more specifically, relate to the method and equipment thereof of sharing wireless resource information in a wireless communication system.

Background technology

3GPP LTE (third generation partner program Long Term Evolution) communication system is schematically interpreted as the example of the wireless communication system that the present invention is applied to.

Fig. 1 is the schematic diagram of the E-UMTS network configuration of an example as wireless communication system.E-UMTS (Universal Mobile Telecommunications System of evolution) is the system from conventional UMTS (Universal Mobile Telecommunications System) evolution.Current, the basic standardization work well afoot of E-UMTS is used for by 3GPP.E-UMTS is commonly called LTE system.For the detailed content reference " 3 respectively of the technical specification of UMTS and E-UMTS ^rdgeneration partnership project; Technical specification group radio access network (third generation partner program; Technical specification group radio access network) " version 7 and version 8.

The IAD (being abbreviated as AG hereinafter) that subscriber equipment (UE), e Node B (eNB) and the mode with the end being positioned at network (E-UTRAN) are connected to external network is comprised with reference to figure 1, E-UMTS.ENB can send the multiple data stream for broadcast service, multicast service and/or unicast services simultaneously.

An eNB comprises at least one community.Downlink transmission service or uplink transmission services are supplied to multiple subscriber equipment by of being set in the bandwidth of 1.44MHz, 3MHz, 5MHz, 10MHz, 15MHz and 20MHz by community.Different communities can be configured to provide corresponding bandwidth respectively.ENB controls to the transfer of data of multiple subscriber equipment/from the data receiver of multiple subscriber equipment.For down link (being abbreviated as DL hereinafter) data, by sending DL schedule information, eNB notifies that corresponding subscriber equipment sends the time/frequency region of data, coding, size of data, HARQ (mixing repeats and request automatically) thereon for information about etc.And, for up link (being abbreviated as UL hereinafter) data, eNB is by being sent to the corresponding subscriber equipment of corresponding notification of user equipment by the spendable time/frequency region of corresponding subscriber equipment, coding, size of data, HARQ for information about etc. by UL schedule information.The interface for delivery of user traffic or service control transmission can be used between eNB.The AG (IAD) that core network (CN) to be registered etc. by the user for subscriber equipment and network node form.The mobility of TA (tracing area) Single Component Management subscriber equipment of AG by being made up of multiple community.

LTE is developed into based on WCDMA wireless communication technology.But, the demand of user and service supplier and expectation sustainable growth.In addition, because different types of radio access technologies development, so the technological evolvement that will look for novelty is to have future competition.In order to the competitiveness in future, require the reduction of every bit cost, the increase of service availability, flexibly frequency band use, the simple interface of structure/opening and the reasonable power consumption etc. of subscriber equipment.

Summary of the invention

Technical assignment

The object of the invention is to provide a kind of method and the equipment thereof of sharing wireless resource information in a wireless communication system.

Above-mentioned technical assignment is not limited to from the obtainable technical assignment of the present invention.Further, other NM technical assignment can be expressly understood at the those of ordinary skill of the technical field that the invention belongs to from description below.

Technical scheme

In order to realize these and other advantage and according to purposes of the present invention, as implemented and describing widely, according to an embodiment, a kind of method sharing the radio resource information of community in multi-cell wireless communication system comprises the steps: radio resource information to be sent to neighbor cell, and in response to radio resource information from neighbor cell confirmation of receipt message, wherein radio resource information is corresponding to the information of use being used to the radio resource changing particular radio resource region, and acknowledge message is corresponding to indicating whether the message allowing the use changing radio resource in adjacent community.

Preferably, acknowledge message is determined based at least one in the interference volume of the uplink-downlink communication load states of neighbor cell and the expection on particular radio resource region by neighbor cell.

Preferably, acknowledge message is sent based on predefined physical radio channel or X2 interface.

Preferably, particular radio resource region is configured to make neighbor cell not perform uplink-downlink communication.

Preferably, acknowledge message instruction does not allow the change of the use of radio resource in specific radio resource region, and the method can comprise the step receiving recommended radio resource use change information from neighbor cell further.

Preferably, radio resource information comprises the information configured about at least one or multiple uplink-downlink (UL-DL), and acknowledge message comprises the information of the specific UL-DL configuration allowed about the neighbor cell in the middle of at least one or multiple UL-DL configuration.

Preferably, the time synchronized difference that neighbor cell can correspond to itself and community is less than the community of the threshold value of regulation.

Preferably, radio resource information comprises the information of the number of the subframe of the change about the use wherein performing radio resource.

Preferably, particular radio resource region comprises the radio resource being used to send and receive specific reference signals.More specifically, according to predefined reference signal configuration information configuration specific reference signals, and reference signal configuration information comprises from by least one of the selection following formed group: the transmitted power of the type of the number of antenna port, physical cell identifier, virtual subdistrict identifier, reference signal, configuration index and reference signal.

Preferably, radio resource information comprises at least one in the use of the subframe of specific time sequence and the subframe of specific time sequence.Radio resource information comprises further about the information in the uplink control transmissions region of Serving cell or the information about specific reference signals transmission region.

Preferably, the change of the use of radio resource is configured to use the radio resource being configured for uplink communication for downlink communication, or uses the radio resource being configured for downlink communication for uplink communication.

Preferably, radio resource information comprises the information of the resource utilization about particular radio resource region further.

In order to realize the advantage of these and other and according to purposes of the present invention, according to an embodiment, a kind of method of radio resource information shared in multi-cell wireless communication system comprises the steps: to receive radio resource information from specific cell; The change of the use of the radio resource allowing specific cell is determined whether based on radio resource information and uplink-downlink communication load states; And allow the acknowledge message of change of the use of radio resource to be sent to specific cell by indicating whether, wherein radio resource information is corresponding to the information being used to specific cell and changing the use of the radio resource in particular radio resource region.

Beneficial effect

According to the present invention, when dynamically changing radio resource in a wireless communication system according to system load, can mutually to be shared the mode executive communication effectively about the information of radio resource by multiple community.

Above-mentioned effect is not limited to from the obtainable effect of the present invention.Further, concerning the those of ordinary skill of the technical field that the invention belongs to, other NM effect can be expressly understood according to description below.

Accompanying drawing explanation

Accompanying drawing is included to provide further understanding of the present invention and involved and form the part of this specification, and accompanying drawing illustrates embodiments of the invention and together with the description principle of the present invention that lays down a definition.

Fig. 1 is the schematic diagram of the E-UMTS network configuration of an example as wireless communication system;

Fig. 2 is at the figure based on the chain of command of radio interface protocol between the subscriber equipment of 3GPP radio access network standard and E-UTRAN and the structure in user face;

Fig. 3 is the figure for explaining the physical channel being used to 3GPP system and the general signal transmission method using this physical channel;

Fig. 4 is the figure of the structure for the radio frame in LTE system;

Fig. 5 is the figure of an example of resource grid for downlink time slots;

Fig. 6 is the figure of an example of structure for downlink subframe;

Fig. 7 is the figure of the structure for the uplink sub-frames in LTE system;

Fig. 8 is the figure of the example for performing CoMP;

Fig. 9 is the figure for explaining the problem of inter-cell interference occurred when not sharing the information about the change in the use of radio resource between cells;

Figure 10 is according to the flow chart for sharing the wireless resource information shared by specific cell of the present invention;

Figure 11 is the flow chart of the data flow for mutually sharing wireless resource information between multiple community according to an embodiment of the invention;

Figure 12 is for the figure performing the example of change in the use of radio resource between cells according to the present invention;

Figure 13 be for configure according to the present invention by the figure of synchronized cells collection;

Figure 14 is the figure of the example for the base station and subscriber equipment being applicable to embodiments of the invention.

Embodiment

Embodiments of the invention described below can be applied to various wireless access technology, comprise CDMA (code division multiple access), FDMA (frequency division multiple access), TDMA (time division multiple access), OFDMA (OFDM), SC-FDMA (single-carrier frequency division multiple access) etc.CDMA can be realized by the radiotechnics of such as UTRA (universal terrestrial radio access), CDMA2000 etc.Can by such as GSM/GPRS/EDGE (global system for mobile communications)/General Packet Radio Service/realize TDMA for the radiotechnics of the enhancing data rate of GSM evolution.OFDMA can be realized by the radiotechnics of such as IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802-20, E-UTRA (UTRA of evolution).UTRA is a part for UMTS (Universal Mobile Telecommunications System).3GPP (third generation partner program) LTE (Long Term Evolution) is the part of the E-UMTS (UMTS of evolution) using E-UTRA.3GPP LTE adopts OFDMA in the down link (being abbreviated as DL hereinafter), and (is abbreviated as UL hereinafter) in the uplink and adopts SC-FDMA.And LTE-A (LTE-is senior) is the evolution version of 3GPP LTE.

In order to clear, following description relates generally to 3GPP LTE system or 3GPP lte-a system, and technical idea of the present invention can not be limited.Particular term described below can be provided for help to understand the present invention.Further, the use of particular term can be modified to other form in the scope of technical idea of the present invention.

Fig. 2 is the figure based on the chain of command of radio interface protocol between the subscriber equipment of 3GPP radio access network standard and E-UTRAN and the structure in user face.Chain of command means following path, sends on the path by subscriber equipment (UE) and Web vector graphic with the control message of administer calls.User face means following path, is sent in the data generated in application layer on the path, such as voice data, internet packet data etc.

Physical layer as ground floor uses physical channel to provide information transfer service to more high-rise.Physical layer is connected to the medium access control layer be located thereon via transmission channel.Data move on transport channels between medium access control layer and physical layer.Data move on the physical channel between the physical layer of transmitter side and the physical layer of receiver side.Physical channel utilizes time and frequency as radio resource.Particularly, by OFDMA (OFDM) modulating scheme physical layer in DL, and by SC-FDMA (single-carrier frequency division multiple access) modulating scheme physical layer in UL.

Service is supplied to and controls (being abbreviated as RLC hereinafter) layer as the more high-rise radio link on logic channel by M AC (the being abbreviated as MAC hereinafter) layer of the second layer.The reliable transfer of data of rlc layer support of the second layer.The function of rlc layer can be realized by the functional block in MAC.PDCP (PDCP) the layer Executive Head compression function of the second layer to reduce unnecessary control information, thus effectively sends the IP grouping of such as IPv4 grouping and IPv6 grouping in the arrowband of radio interface.

Only definition is arranged in radio resource control (being abbreviated as RRC hereinafter) layer of the extreme lower position of third layer on a control plane.Rrc layer is responsible for the configuration of radio bearer (being abbreviated as RB hereinafter), is reconfigured and discharge the control of the logic channel, transmission channel and the physical channel that are associated.RB refers to the service provided by the second layer for the data delivery between subscriber equipment and network.For this reason, the rrc layer of subscriber equipment and the rrc layer of network exchange RRC information mutually.If there is RRC to connect, then under subscriber equipment is in RRC connection mode between the rrc layer and the rrc layer of network of subscriber equipment.Otherwise, under subscriber equipment is in RRC idle pulley.NAS (Non-Access Stratum) layer be positioned at above rrc layer performs the function of such as session management, mobile management etc.

The single subdistrict be made up of e Node B is set to one in 1.4MHz, 3MHz, 5MHz, 10MHz, 15MHz and 20MHz bandwidth, and then down link or uplink transmission services is supplied to multiple subscriber equipment.Different communities can be configured to provide corresponding bandwidth respectively.

For by data from the DL transmission channel that network is sent to subscriber equipment comprise for transmitting system information BCH (broadcast channel), for send beep-page message PCH (paging channel), for down link SCH (shared channel) sending customer service or control message etc.Can at DL SCH or independent DL MCH (Multicast Channel) upper transmission DL multicast/broadcast service business or control message.Meanwhile, the UL transmission channel for data are sent to network from subscriber equipment comprises the RACH (Random Access Channel) for sending initial control message and the up link SCH (shared channel) for sending customer service or control message.To be positioned at above transmission channel and the logic channel being mapped to transmission channel comprises BCCH (Broadcast Control Channel), PCCH (Paging Control Channel), CCCH (public control channel), MCCH (multicast control channel), MTCH (Logical Traffic Channels) etc.

Fig. 3 is the figure for explaining for the physical channel of 3GPP system and the general signal transmission method of use physical channel.

If the power supply of subscriber equipment is switched on or subscriber equipment enters new community, then subscriber equipment can perform for mating and the synchronous search of initial zone operation of e Node B etc. [S301].For this reason, subscriber equipment can from e Node-B receiver primary synchronization channel (P-SCH) and auxiliary synchronization channel (S-SCH), then can obtain the information of such as community ID etc. with e Node B sync.Subsequently, then subscriber equipment from e Node-B receiver Physical Broadcast Channel, and can obtain broadcast message in community.Meanwhile, subscriber equipment can receiving downlink reference signal (DL RS) in search of initial zone step, and then can check DL channel status.

After completing search of initial zone, subscriber equipment according to physical downlink control channel (PDCCH) and the upper information carried of physical downlink control channel (PDCCH), can receive physics downlink shared control channel (PDSCH).Then subscriber equipment can obtain detailed system information [S302].

Subsequently, subscriber equipment can perform random access procedure, to complete the access [S303 to S306] to e Node B.For this reason, then subscriber equipment the upper transmission leading [S303] of Physical Random Access Channel (PRACH), and can receive response message [S304] in response to leading on PDCCH and corresponding PDSCH.When the random access procedure based on competition, the contention resolved process of the additional transmitted [S305] of such as PRACH and the reception [S306] of PDCCH and corresponding PDSCH can be performed in addition.

After executing said process, subscriber equipment can perform PDCCH/PDSCH and receive [S307] and PUSCH/PUCCH (physical uplink link shared channels/physical uplink control channel) transmission [S308], as general uplink/downlink signals transmission.The control information being sent to base station by subscriber equipment can by jointly called after uplink control information (being abbreviated as UCI hereinafter).UCI can comprise HARQ-ACK/NACK (ACK is replied/negated to hybrid automatic repeat-request), SR (dispatch request), CSI (channel condition information) etc.In this manual, HARQ ACK/NACK is referred to simply as HARQ-ACK or ACK/NACK (A/N).HARQ-ACK comprise from by select in the group that certainly ACK (simply, ACK), negative ACK (NACK), DTX and NACK/DTX form at least one.CSI comprises CQI (channel quality instruction), PMI (pre-coding matrix instruction), RI (order instruction) information etc.UCI is sent out via PUCCH usually.But, when needs send control information with business datum simultaneously, UCI can be sent on PUSCH.In addition, UCI can be sent aperiodically via PUSCH in response to the request/instruction by network.

Fig. 4 is the figure of the structure for the radio frame in 3GPP LTE.

With reference to figure 4, in cellular OFDM packet radio communication system, in units of subframe, perform UL/DL (uplink/downlink) data packet transfer.Further, a subframe is defined as the predetermined time interval comprising multiple OFDM symbol.In 3GPP LTE standard, support can be applicable to the Class1 radio frame structure of FDD (Frequency Division Duplexing (FDD)) and can be applicable to type 2 radio frame structure of TDD (time division duplex).

Fig. 4 (a) is the figure of the structure for Class1 radio frame.DL (down link) radio frame comprises 10 subframes.Each subframe comprises 2 time slots in the time domain.Further, the time sending a subframe cost is defined as Transmission Time Interval (being abbreviated as TTI hereinafter).Such as, subframe can have the length of 1ms and time slot can have the length of 0.5ms.A time slot can comprise multiple OFDM symbol in the time domain, and can comprise multiple Resource Block (RB) in a frequency domain.Because 3GPP LTE system uses OFDMA in the downlink, so OFDM symbol is provided to instruction mark space.OFDM symbol can be named as SC-FDMA symbol or mark space.Resource Block (RB) is resource allocation unit, and can comprise multiple continuous print subcarrier in one time slot.

The number of the OFDM symbol comprised in one time slot can change according to the configuration of CP (Cyclic Prefix).CP can be classified into expansion CP and normal CP.Such as, when OFDM symbol is configured by normal CP, the number of the OFDM symbol comprised in one time slot can correspond to 7.In OFDM symbol by when expanding CP configuration, because the length of an OFDM symbol increases, so the number of the OFDM symbol comprised in one time slot can be less than the number of the OFDM symbol of the situation of normal CP.When expanding CP, such as, the number of the OFDM symbol comprised in one time slot can correspond to 6.If channel status instability (such as, UE is just in high-speed mobile), then expansion CP can be used to reduce intersymbol interference further.

In time using normal CP, because a time slot comprises 7 OFDM symbol, so a subframe comprises 14 OFDM symbol.In this case, 2 or 3 OFDM symbol before each subframe can distribute to PDCCH (physical downlink control channel), and remaining OFDM symbol distributes to PDSCH (physical down link sharing channel).

Fig. 4 (b) is the figure of the downlink radio frame structure for type 2.Type 2 radio frame comprises 2 fields.Each field comprises 4 normal sub-frames, and wherein each comprises two time slots; And specific sub-frame, it comprises DwPTS (down link pilot timeslot), GP (protective time slot) and UpPTS (uplink pilot time slot).

In specific sub-frame, DwPTS is used for search of initial zone in a user device, synchronous or channel estimating.UpPTS is used for the channel estimating in base station, and the transmitting synchronous of match user equipment.Especially, DwPTS be used to DL transmission and UpPTS be used to UL transmission.Especially, in order to send the leading or SRS of PRACH and utilize DwPTS.Protective time slot is for eliminating between up link and down link because the multidiameter of down link signal causes the period of the interference produced in the uplink.

About specific sub-frame, below by the configuration of the current 3GPP normative document definition specific sub-frame in table 1.Table 1 illustrates at T _sdwPTS and UpPTS when=1/ (15000 × 2048) and remaining region is configured to protective time slot.

[table 1]

Meanwhile, the structure of the radio frame of type 2 shown in table 2 below, that is, the UL/DL sub-frame configuration in TDD system.

[table 2]

In table 2, " D " indicates DL subframe, and " U " indicates UL subframe, and " S " indicates specific sub-frame.Further, table 2 also illustrates the DL-UL switching point periodicity in each system in UL/DL subframe.

The aforementioned structure of radio frame is only example.The number of the subframe comprised at radio frame, the number of time slot comprised in subframe and the number of symbol comprised in a slot can change in every way.

Fig. 5 is the figure of an example of resource grid for downlink time slots.

With reference to figure 5, downlink time slots comprises in the time domain individual OFDM symbol and comprising in a frequency domain individual Resource Block.Because each Resource Block comprises individual subcarrier, so downlink time slots comprises in a frequency domain individual subcarrier.In Figure 5, although it is described to downlink time slots comprise 7 OFDM symbol and Resource Block comprises 12 subcarriers, the present invention can be not limited thereto.Such as, the number of the OFDM symbol comprised at downlink time slots can depend on the length of Cyclic Prefix (CP) and change.

Each element on resource grid is called as resource element (RE).A resource element is indicated by an OFDM symbol index and a sub-carrier indices.A RB comprises individual resource element.The number of Resource Block ( ) depend on the downlink transmission bandwidth configured in community.

Fig. 6 is the figure of the example of structure for downlink subframe.

With reference to figure 6, maximum 3 (4) the individual OFDM symbol being positioned at the head of the first time slot of a subframe correspond to the control area assigning control channel to it.Remaining OFDM symbol corresponds to the data area to its assignment PDSCH (physical down link sharing channel).The example of the DL control channel that LTE uses can comprise PCFICH (physical control format indicator channel), PDCCH (physical downlink control channel), PHICH (physical mixed automatic repeat request indicator channel) etc.The PCFICH that first OFDM symbol of subframe carries carries the information of the number about the OFDM symbol being used to control channel transmission in subframe.PHICH carrying is in response to HARQ ACK/NACK (mixed automatic repeat request acknowledgement/non-acknowledgement) signal of UL transmission.

The control information that PDCCH carries is called as down link control information (being abbreviated as DCI hereinafter).DCI comprises resource allocation information for subscriber equipment or group of user equipments and different control information.Such as, DCI comprises DL/UL schedule information, UL sends (Tx) power control command etc.

PDCCH can carry transformat and the resource allocation information of DL-SCH (downlink sharied signal channel), the transformat of UL-SCH (uplink shared channel) and resource allocation information, about the paging information of PCH (paging channel), about the system information of DL-SCH, the resource allocation information of the top level control message of the accidental access response such as sent on PDSCH, for transmission (Tx) power control command that the independent subscriber equipment in subscriber equipment (UE) group is arranged, send (Tx) power control command, activation indication information of VoIP (ip voice) etc.Multiple PDCCH can be sent and subscriber equipment can monitor multiple PDCCH in control area.The polymerization of multiple continuous print control channel element (CCE) sends PDCCH.CCE is used to the logical assignment unit providing code check according to the state of radio channel to PDCCH.CCE corresponds to multiple REG (resource element group).The number of the form of PDCCH and the bit of PDCCH is determined by the number of CCE.Base station is according to sending to the DCI of subscriber equipment to determine PDCCH form and CRC (cyclic redundancy check (CRC)) being attached to control information.According to the owner of PDCCH or purposes CRC is masked identifier (being called as RNTI (radio network temporary identifier)).If for specific subscriber equipment provides PDCCH, then CRC maskedly can have the identifier of corresponding subscriber equipment, that is, C-RNTI (that is, community-RNTI).As different examples, if provide PDCCH for beep-page message, then CRC maskedly can have paging identifier (such as, P-RNTI (paging-RNTI)).If be system information, and more specifically, for system information block (SIB) provides PDCCH, then CRC maskedly can have system information identifier (such as, SI-RNTI (system information-RNTI)).If for accidental access response provides PDCCH, then CRC maskedly can have RA-RNTI (Stochastic accessing-RNTI).

Fig. 7 is the figure of the structure for the uplink sub-frames in LTE system.

Multiple time slot (such as, 2 time slots) is comprised with reference to figure 7, UL subframe.Time slot depends on that CP length can comprise the SC-FDMA symbol of different number.UL subframe can be divided into data field and controlled area in a frequency domain.Data field comprises PUSCH, and can be used to the data-signal sending such as audio frequency etc.Controlled area comprises PUCCH, and is used to send uplink control information (UCI).PUCCH comprises the RB couple at the two ends place of the data field be positioned on frequency axis, and jumps on the border of time slot.

PUCCH can be used to send following control information.

-SR (dispatch request): this information is for asking up link UL-SCH resource.OOK (on-off keying) scheme is used to send this information.

-HARQ ACK/NACK: the signal sent in response to the DL packet on PDSCH.Whether this information instruction DL packet is successfully received.ACK/NACK 1 bit is sent and in response to two DL code words to send ACK/NACK 2 bit in response to single DL code word.

-CQI (CQI): for the feedback information of DL channel.CSI comprises CQI (CQI) and the relevant feedback information of MIMO (multiple-input and multiple-output) comprises RI (order designator), PMI (precoding matrix indicators), PTI (precoding type indicator) etc.Each subframe uses 20 bits.

The amount of the control information (UCI) that can be sent by subscriber equipment in subframe depends on the number of the SC-FDMA that can be used for sending control information.Can be used for the remaining SC-FDMA symbol of SC-FDMA instruction except be used to send the SC-FDMA symbol of reference signal in subframe except sent control information.When the subframe that SRS (detection reference signal) is set to, from available SC-FDMA, also get rid of the last SC-FDMA of subframe.Reference signal is used to the relevant detection of PUCCH.

Below, CoMP (cooperative multipoint transmission/reception) is explained.

The system intends occurred after LTE-A introduces the scheme strengthening systematic function, and this is by strengthening by making multiple community mutually cooperate.This scheme is called as cooperative multipoint transmission/reception (being abbreviated as CoMP hereinafter).CoMP communicates to perform the scheme used at special user equipment and the communication between base station, access point or community smoothly with subscriber equipment by 2 or more base station, access point or community collaboratively.Run through the present invention, base station, access point or community can be used as identical meaning.

Usually, presence of intercell interference can reduce the throughput of the performance of the subscriber equipment being positioned at cell boarder place and the average sector under the multi-cell environment of channeling index corresponding to 1.In order to reduce presence of intercell interference, tradition LTE system adopts the simple and passive method of the such as fractional frequency reuse (FFR) controlled via the specific power of UE for the subscriber equipment being positioned at cell boarder place, makes to have rational effectiveness of performance under the environment of interference-limited.But, substitute the use of the frequency resource reducing each community, can more preferably, utilize the signal desired by subscriber equipment reduce ICI or reuse ICI.In order to realize aforementioned object, CoMP transmission scheme can be employed.

Fig. 8 is the figure of the example for performing CoMP.With reference to figure 8, wireless communication system comprises the multiple base stations (BS 1, BS 2 and BS 3) and subscriber equipment that perform CoMP.Data can be sent to subscriber equipment in co-operating mode by multiple base stations (BS 1, BS 2 and BS 3) effectively that perform CoMP.According to whether CoMP being mainly categorized into two types from each the transmission data multiple base stations of execution CoMP.

– Combined Treatment (CoMP Combined Treatment (COMP-JP))

– cooperative scheduling/Wave beam forming (CoMP-CS/CB)

According to CoMP-JT, data are sent simultaneously to subscriber equipment from the multiple base stations performing CoMP, and subscriber equipment strengthens receptivity by mutually combining the signal sent from each multiple base station.Especially, according to CoMP-JP scheme, can usage data each point (base station) of CoMP IWU.The instruction of CoMP IWU is used to the set of the base station of the transmission plan cooperated.JP scheme can be classified into joint transmission scheme and dynamic cell selection scheme.

Joint transmission scheme means to send PDSCH from multiple transfer point (part for CoMP IWU or entirety) simultaneously.Especially, can send from multiple transfer point the data being sent to unique user equipment simultaneously.According to joint transmission scheme, the quality of the signal received can coherently or irrelevantly be strengthened, and disturbs the interference of different user devices also can be eliminated energetically.

Dynamic cell selection scheme means the scheme simultaneously sending PDSCH from (CoMP IWU) single transfer point.Especially, the data being sent to unique user equipment in the specific time to send and data are not sent to subscriber equipment at this special time by the difference of CoMP IWU from a single point.Point data being sent to subscriber equipment can be dynamically selected.

By contrast, when CoMP-CS, at any time data are sent to unique user equipment via base station, and operation dispatching or Wave beam forming are to minimize the interference coming from different base station.Especially, according to CoMP-CS/CB scheme, CoMP IWU can perform the Wave beam forming of the transfer of data for being sent to unique user equipment collaboratively.Under these circumstances, although send data from Serving cell, user scheduling/Wave beam forming can be determined by the cooperation of the community of CoMP IWU.

Meanwhile, when UL, the multipoint reception of cooperation mean to receive by geographically mutual away from the signal that sends of the cooperation of multiple points.The CoMP scheme that can be applicable to the situation of UL can be classified into combines reception (JR) and cooperative scheduling/Wave beam forming (CS/CB).

JR scheme means to receive by multiple acceptance point the signal sent via PUSCH.CS/CB scheme means receive PUSCH by a single point and determine user scheduling/Wave beam forming by the cooperation of the community of CoMP IWU.

Below, the presence of intercell interference between multiple community is explained.

If a part for the covering of two base stations is mutually overlapped, picture arranges two base stations (such as in mode adjacent one another are, base station #1 and base station #2) situation, then the subscriber equipment of base station service seriously may be disturbed by the powerful down link signal of another base station.As mentioned in aforesaid description, if presence of intercell interference occurs, then between two base stations, presence of intercell interference can be reduced by use multi-cell cooperating signaling schemes.In the of the present invention various embodiment be described below, assuming that send smoothly and Received signal strength between the base station of two interference/disturbed.Such as, assuming that there is wired/wireless link (such as between two base stations, back haul link or Un interface), comprise the mode of the transmission conditions of good such as transmission bandwidth, time delay etc., between two base stations, the transmission of cooperative signal and reception are situations very reliably.And, can suppose that the time synchronized in range of allowable error between two base stations is mated (such as mutually, the edge of the downlink subframe of the base station of two interference/disturbed is aligned) situation, or be clearly identified in the situation of difference (skew) of the sub-frame boundary between two base stations by two base stations.

Refer again to Fig. 8, base station #1 (BS#1) corresponds to the macro base station sending the wide region of power service with height, and base station #2 (BS#2) corresponds to micro-base station (such as, femto base station) in territory, low transmitted power Serving cell.As shown in the example of fig. 8, if be positioned at the cell border areas place of base station #2 and the UE served by base station #2 is seriously disturbed by base station #1, then may be difficult to perform efficient communication when there is no suitable minizone cooperation.

Especially, when attempting to alleviate the service load as the base station #1 of macro base station, in the mode making great amount of terminals be connected with the base station #2 of the micro-base station as low transmitted power, probably there is the situation of aforesaid presence of intercell interference.Such as, when subscriber equipment intention selects serving BS, subscriber equipment can to add the received power from micro-base station to by the regulated value (bias) of regulation and be not that the mode of being added to by the regulated value of regulation from the received power of macro base station calculates and mutually compares the received power of each down link received from multiple base station.By doing like this, subscriber equipment can be selected to provide the base station of highest downlink link received power as serving BS.Therefore, more terminal can be connected to micro-base station.Although the intensity of the signal that the strength ratio of the actual down link signal received receives from macro base station is weak from micro-base station, micro-base station can be selected as serving BS and the terminal be connected with micro-base station may experience the powerful interference coming from macro base station.Under these circumstances, if do not provide the cooperation of independent minizone, then for the terminal of boundary being positioned at micro-base station, because the powerful interference coming from macro base station may be difficult to perform the operation strengthened.

If there is presence of intercell interference between two base stations, then the suitable cooperation between the base station being necessary to perform interference/disturbed is to perform valid function.The signal making it possible to perform cooperative operation can be received and dispatched via the link between two base stations.Under these circumstances, if there is presence of intercell interference between macro base station and micro-base station, then macro base station controls minizone cooperative operation and micro-base station can perform suitable operation according to the cooperative signal notified by macro base station.

Aforesaid presence of intercell interference generation situation is only example.Clearly, embodiments of the invention can be equally applied to the situation (situation of the presence of intercell interference such as, occurred between the macro base station of HeNB and the OSG scheme of CSG scheme, macro base station cause interference and macro base station is subject to the situation of the interference of this interference or the situation of presence of intercell interference existence between micro-base station or macro base station etc.) being different from aforementioned circumstances.

In addition, if the load condition change specific cell according to specific cell changes radio resource (such as, UL resource or DL resource) the object that communicates in order to DL or UL of use, then the present invention proposes the method via the use effectively changing radio resource that cooperates with neighbor cell.

If change the use of radio resource according to the load condition change specific cell of specific cell, then must notify neighbor cell for information about.Especially, if the information of the change of the use about radio resource is not shared in specific cell with neighbor cell, then specific cell and neighbor cell may due to the quite a large amount of interference (such as, UE to UE interference, eNB to eNB disturb etc.) of mutually different communication directions transmitting-receiving and arbitrary cells may have problem in the communication of the suitable quality of execution.

Therefore, in the following description, via the predefined operation of the interference of measuring between base station, interference measurement results feedback operation (such as, share interference measurement results via the X2 interface between base station) etc. explain and be used for the specific method being less than neighbor identification, neighbor cell is subject to the impact of dynamic operation of the specific cell of the use changing radio resource.

Fig. 9 is the figure for explaining the problem of inter-cell interference occurred when mutually not sharing the information about the change of the use of radio resource between cells.

With reference to figure 9, illustrate that UL-DL sub-frame configuration is become the situation of UL-DL sub-frame configuration #2 (" DSUDDDSUDD ") by community #A from UL-DL sub-frame configuration #1 (" DSUUDDSUUD ") according to the increase of the DL data communication load of community #A.

In fig .9, if community #A does not have notifying cell #B about the information of the dynamic change of the use of the radio resource of community #A, then perform the UE#A that communicates with the DL of community #A in specific sequential (such as, SF#13, SF#18 etc.) on receive UE to UE disturb from performing the UE#B that communicates with the UL of community #B, and perform the community #B that communicates with the UL of UE#B to receive eNB to eNB disturb from performing the community #A communicated with the DL of UE#A in specific sequential (that is, SF#13 with SF#18).

Therefore, when dynamically changing the use of radio resource according to the load condition of specific cell change specific cell, require to have additional minizone collaboration method to guarantee the communication quality of specific cell under the communication quality of neighbor cell and appropriate state.The present invention proposes the preferred minizone collaboration method when the method for the use dynamically changing radio resource is employed.

Figure 10 is for the flow chart sharing the wireless resource information shared by specific cell according to the present invention.

With reference to Figure 10, radio resource information is sent to neighbor cell [S1001].Especially, according to the present invention, if specific cell changes the use of radio resource according to the load condition change of specific cell, then specific cell can notify that the radio resource changed is wanted in neighbor cell about specific cell, or the information of the radio resource that probably will change (such as, frequency domain/time-domain position, about the information etc. using change direction).

Information about radio resource can comprise the UL-DL configuration of change or new definition or can comprise static resource or flexible resource.Such as, resource can be defined by time/frequency resource in the present invention.Static resource and flexible resource can be defined respectively by static subframe and flexible sub-frame.

In the present invention, static resource can be defined as the resource of the use (such as, DL communication or UL communication) being used to the radio resource previously configured or use the resource of configuration use according to predefined radio resource.Therefore, can by the resources definition selected from the group be made up of following resource according to static resource of the present invention: be used to the resource of the use same use of the resource on SIB, be used to use at previous radio resource reconfigure the use same use that regular intervals of time configures resource, be used to in the resource of predefined UL/DL with reference to the use same use on HARQ timeline, and be used to in the resource of predefined UL/DL with reference to the use same use in UL-DL configuration.

Further, in the present invention, flexible resource is defined as the resource being used to the use dynamically changing radio resource.Such as, can be defined according to flexible resource of the present invention by the resource selected from the group be made up of following resource: be used to the resource of the use of the resource be different from SIB, be used to from use at previous radio resource reconfigure the different purposes of use that period distances configures resource, be used to in the predefined UL/DL resource with reference to the different purposes of use on HARQ timeline, and be used to from the resource of predefined UL/DL with reference to the different purposes of use in UL-DL configuration.

Therefore, according to the present invention, can use from being configured by aforesaid UL-DL, select group that static resource and flexible resource form at least one notify at least one or the multiple adjacent community information about radio resource.

After having received the information about radio resource, adjacent community can based on the current loading condition of neighbor cell (such as, the state that DL or UL data communication load is high) or when specific cell dynamically changes the use of radio resource expection occur or calculate interference volume, in response to the dynamic change of the use of the radio resource of specific cell, to specific cell notification acknowledgement or confirmation response message [S1003].

Under these circumstances, based on predefined physical radio channel or X2 interface, the information of the change of the use about the radio resource being sent to neighbor cell by specific cell and the response message (or response confirmation message) by notice specific cell, neighbor cell can be sent.Further, only when neighbor cell allows the use changing the radio resource changed by specific cell, can send according to acknowledge message of the present invention or response confirmation message.Or acknowledge message or response confirmation message can be used to notify whether specific cell allows the change of the use of radio resource.

Therefore, according to the present invention, when the change of the use of the radio resource of permission specific cell, neighbor cell, neighbor cell receives the region of the radio resource of severe jamming wherein or wherein probably receives not executive communication wittingly (interference avoidance method such as, in time resource region) the region of the radio resource of severe jamming from specific cell.Or neighbor cell can the subscriber equipment (such as, being positioned in the subscriber equipment of Intra-cell) of executive communication can dispatch the state even existed in interference with limiting under.Such as, neighbor cell can be configured to the information not notifying the methods for interference mitigation (or interference avoidance method) performed in the region of the change of the use about the radio resource in execution specific cell to specific cell.Or, if the application being applied to the methods for interference mitigation (or interference avoidance method) in the region of the change of the use performing radio resource by adjacent community has the possibility of the operation of the specific cell of the communication affecting specific cell or the use dynamically changing radio resource, then neighbor cell can be configured to the information notifying the methods for interference mitigation (or interference avoidance method) that specific cell is applied about neighbor cell.In addition, received the information about methods for interference mitigation (or interference avoidance method) from neighbor cell, specific cell can be considered to change the operation of use of radio resource and the information of the methods for interference mitigation communicated of specific direction about performing after receiving information.

According to the present invention, if adjacent community does not allow the use of the radio resource changing specific cell, then specific cell can be configured to not perform the operation that specific cell changes the use of radio resource.

In addition, if neighbor cell does not allow the use of the radio resource of specific cell to change, then consider the current loading condition of neighbor cell or the interference volume of expection appearance or calculating when specific cell dynamically changes the use of radio resource, neighbor cell can notify that the radio resource of suitable recommendation uses change information again to specific cell.Such as, based on predefined physical radio channel or X2 interface, recommended radio resource uses change information can be sent to specific cell by neighbor cell.And, according to the present invention, after having received recommended radio resource use change information, specific cell can to reflect that the radio resource of renewal uses change information to be sent to neighbor cell by the mode of the information (that is, recommended radio resource uses change information) received again.

Figure 11 is for the flow chart mutually sharing the data flow of wireless resource information between multiple community according to an embodiment of the invention.

In fig. 11, assuming that share the situation of radio resource information in the wireless communication system comprising community #A and community #B.

According to the present invention, the information of the change of the use about radio resource is sent to community #B [S1101] by community #A.

After receiving information, consider the state of community #B, namely, the UL-DL communication load states of community #B, change particular radio resource (such as at community #A, subframe) use when the interference volume of expecting etc., community #B determines whether the use [S1103] allowing to change radio resource.Such as, when community #A is intended to use the specific UL subframe being used for DL use, if determine that the interference volume between community #A and community #B does not affect the communication of community #B, then community #B can determine the use allowing the radio resource changing community #A.

Subsequently, whether community #B can will allow the information of the use changing radio resource about what determine in step S1103 and send to community #A [S1105] about the information of the change of the use of radio resource.

In addition, when applying the present invention to the network comprising multiple community, changing the operation of the use of radio resource or allowing the operation of the use of the radio resource changing specific cell may affect the operation of use and the communicating of specific direction of the radio resource changing neighbor cell successively.Therefore, via predefined between base station and base station interferometry operation, interference measurement results feedback operation (such as, interference measurement results via between X2 interface sharing base) etc., specific cell can identify the neighbor cell of the operating influence of the operation being subject to the use changing radio resource or the use allowing the radio resource changing specific cell.

In the present invention, the change of the use of radio resource can be performed based on predefined time/frequency unit (such as, subframe unit) or traditional UL-DL dispensing unit.

Such as, if perform the change of the use of radio resource based on traditional UL-DL sub-frame configuration unit, then specific cell can notify that neighbor cell intention is changed or very possible reformed specific UL-DL subframe configuration information by specific cell.Or specific cell can notify that neighbor cell to be changed by specific cell about intention or the information of very possible reformed multiple UL-DL sub-frame configuration candidate.

After the information of change receiving the use about radio resource, based on specific one UL-DL subframe configuration information or the information about multiple UL-DL sub-frame configuration candidate, neighbor cell can notify the information of specific cell about the admissible UL-DL sub-frame configuration in neighbor cell (or set of UL-DL subframe) again.

Such as, under the heterogeneous network situation that macrocell and picocell coexist, if macrocell applies fixing UL-DL sub-frame configuration #1 and picocell dynamically changes UL-DL sub-frame configuration according to the load condition of picocell, then macrocell can notify that picocell is UL-DL sub-frame configuration candidate, that is, consider in the middle of UL-DL sub-frame configuration #2, #4 and #5 that the data communication load state of macrocell allows UL-DL sub-frame configuration #2 and #4.As mentioned in description above, if perform the change of the use of radio resource based on traditional UL-DL sub-frame configuration unit, then the change of the use of radio resource can be widely used in situation about changing based on the execution of predefined time/frequency unit (such as, subframe unit).

According to the present invention, if adjacent community receives instruction, specific cell is configured in the information performing the change of the use of radio resource in the specific communications direction of specific cell, then neighbor cell can be configured to notify that specific cell is about the information of at least one or multiple admissible time/frequency radio resource of load condition considering neighbor cell.Under these circumstances, based on predefined time/frequency unit or traditional UL-DL sub-frame configuration unit, the information about admissible time/frequency radio resource can be configured.

Such as, in the heterogeneous network that macrocell and picocell coexist, assuming that the fixing UL-DL sub-frame configuration #1 of macrocell application and picocell dynamically changes UL-DL sub-frame configuration according to the load condition of picocell.Under these circumstances, if picocell notice macrocell will perform the change of the use of the radio resource in DL communication direction due to this picocell of increase of DL data communication load, then macrocell can notify that the admissible UL-DL sub-frame configuration #2 of the UL load condition of macrocell, #4 and #5 (set) information are considered in picocell.

Figure 12 be for execution community according to the present invention between the figure of example of change that uses of radio resource.Assuming that by UL-DL sub-frame configuration #1 initial configuration community #A and community #B.

With reference to Figure 12, according to the scheme be suggested of the DL data communication load of effectively process increase, community #A is notifying cell #B UL-DL sub-frame configuration #2, #4 and #5 preferentially, comprises the many DL subframes being intended to be changed by community #A.

After having received the UL-DL subframe configuration information comprising multiple DL subframe, community #B again notifying cell #A considers the UL data communication load state of community #B admissible UL-DL sub-frame configuration #2 and #4 in the middle of UL-DL sub-frame configuration candidate.

Finally, community #A selects the UL-DL sub-frame configuration of the DL load condition of most suitable cell #A from the admissible UL-DL sub-frame configuration #2 and #4 being received from community #B.

According to the present invention, in specific cell via predefined signal (such as, X2 interface) when notifying the information of the sub-frame set that neighbor cell changes about the use of its sub-frame set, specific cell can be configured to the resource utilisation information notifying sub-frame set to neighbor cell together.Or, when specific cell via predefined signal notice neighbor cell about very possible change the information of the sub-frame set of the use of its sub-frame set, specific cell can be configured to the resource utilisation information notifying sub-frame set to neighbor cell together.

In the present invention, whether the measured value measured by arbitrary ratio of resource utilisation information instruction is actually used with the corresponding subframe of the sub-frame set by notice neighbor cell, specific cell in the middle of the very possible reformed sub-frame set of use of the reformed sub-frame set of the use being identified at its sub-frame set or its sub-frame set.Or resource utilisation information can indicate and be used to identify the measured value whether corresponding subframe probably will be used to communication.

Especially, according to the present invention, assuming that notice neighbor cell, specific cell comprises 4 subframes (such as, SF# (n+k ₀), SF# (n+k ₁), SF# (n+k ₂) and SF# (n+k ₃)) sub-frame set, use sub-frame set in the mode of the use changing radio resource, and the very possible use changing the radio resource of sub-frame set.Under these circumstances, specific cell can notify the resource utilisation information of neighbor cell arbitrary ratio (such as, 50%) and the information of sub-frame set.After having received this information, neighbor cell can be informed in the actual use in specific cell or very possible use only two subframes in the middle of 4 subframes.Therefore, consider the interference effect by being caused by actual two subframes used or probably use in specific cell, neighbor cell can perform the communication of neighbor cell.

Or, can only in the very possible reformed sub-frame set of use of the reformed sub-frame set of the use of its sub-frame set or its sub-frame set, restrictively resource allocation utilizes the validity of information.Such as, the sub-frame set that the use of reformed for the use of its sub-frame set sub-frame set or its sub-frame set probably changes can be limited to a part for the UL subframe on SIB by specific cell.Certainly, can information be utilized to be limited to all UL subframes by resource allocation.

According to the present invention, assuming that neighbor cell receive from specific cell resource utilisation information and by M subframe form about by changing the making for using or the information of very possible reformed sub-frame set of sub-frame set.After having received this information, neighbor cell can be configured to the position of the subframe based on the actual use in specific cell of resource utilisation information mark, or identifies the position of the subframe that very possible specific cell will use based on predefined rule.Therefore, as the example of rule, the use of the radio resource that will change can be configured based on the descending of the subframe index about M subframe or ascending order.

Such as, if neighbor cell receives reformed by 4 subframes (namely about the use of its sub-frame set from specific cell, SF#4, SF#7, SF#8 and SF#9) information of the very possible reformed sub-frame set of use of the sub-frame set that forms or its sub-frame set and 50% resource utilisation information, then neighbor cell can suppose according to rule (such as, about the descending of subframe index) SF#9 and SF#8 by the actual use in specific cell or probably used by specific cell.Under these circumstances, can prevent from the subframe comprising continuous print subframe index in the middle of the very possible reformed sub-frame set of use of the reformed sub-frame set of the use of its sub-frame set or its sub-frame set after DL uses, be just used as UL about the configuration of the descending of subframe index to use (that is, sequential communicate with UL due to the propagation delay of DL communication shifts to an earlier date the overlapped problem in the subregion of (TA) subframe).

According to the present invention, in specific cell via predefined signal (such as, X2 interface) information of the sub-frame set that probably changed by specific cell of the use that notifies the sub-frame set that the use of neighbor cell about its sub-frame set is changed by specific cell or its sub-frame set when, can be configured to notify in addition with bitmap form about the information of position of subframe or the information that is probably used to the subframe communicated being actually used in communication.

According to the present invention, in specific cell via predefined signal (such as, X2 interface) information of the sub-frame set that probably changed by specific cell of the use that notifies the sub-frame set that the use of neighbor cell about its sub-frame set is changed by specific cell or its sub-frame set when, specific cell can be configured to notify neighbor cell resource utilisation information with bitmap form or predefined form in addition according to the very possible reformed subframe of use of the reformed subframe of the use of its subframe or its subframe.Or specific cell can be configured to notify neighbor cell resource utilisation information in addition according to the very possible reformed subframe group of use of the reformed predefined subframe group of the use of its subframe group or its subframe group.

Under these circumstances, whether the very possible reformed subframe of use that resource utilisation information can be defined as the reformed subframe of use or its subframe being used to identify its subframe is actually used in communication or is probably used to the measured value that communicates.The resource that aforementioned exemplary of the present invention also can be widely used in frequency domain is classified into the situation of the reformed resource collection of use of its resource collection and the very possible reformed resource collection of use of its resource collection.

According to the present invention, effectively support the dynamic change of the use of the radio resource of neighbor cell in order to specific cell, the radio resource that specific cell can be configured to be not used in via predefined signal notice neighbor cell the specific time sequence that scheduled communication uses about specific cell with about will with low transmitted power at least one in the radio resource of specific time sequence that communicates.

Such as, in a tdd system, the neighbor cell received from specific cell about the information of the radio resource of specific time sequence is made up of the time synchronized difference between community or the poor community being less than predetermined threshold of synchronizing sub-frame.Especially, if notice neighbor cell, specific cell about be not used to the specific time sequence that predetermined communication uses subframe information or about will with the information of the radio resource of specific time sequence of low transmitted power for communicating, and adjacent community uses according to the system load state of neighbor cell and is used for the different subframe used, then the additional interference that the difference of the time synchronized between can avoiding by the subframe of specific time sequence or the difference of synchronizing sub-frame supposed by specific cell and neighbor cell cause.

According to the present invention, in the heterogeneous network that macrocell and picocell coexist, if picocell dynamically changes the use of radio resource according to the load condition of picocell, then can avoid the interference caused by mutually different communication directions.Especially, use the subframe of specific time sequence to use as DL when macrocell does not cooperate between cells and picocell uses the subframe of specific time sequence to use as UL time, if picocell performs the communication in UL in sequential, then because the DL of macrocell communicates, high-caliber interference can disturb the communication of picocell.On the contrary, according to the present invention, if picocell uses subframe with the information of the subframe of the specific time sequence used based on the predetermined communication of not being used to of receiving from macrocell or about the mode that will change the use of subframe with low transmitted power for the information of the radio resource of specific time sequence communicated, then can avoid the interference caused by different communication direction relative to macrocell.Such as, from macrocell receive about be not used to the subframe that predetermined communication uses information or will with the information of subframe of low transmitted power for communicating, picocell can be configured to use the subframe of specific time sequence for any use according to the load condition of picocell.

According to the present invention, according to the load condition of specific cell, can configuration notification neighbor cell the number not being used to the subframe that predetermined communication uses or will with the number of subframe of low transmitted power for communicating.Especially, the number of the subframe of specific time sequence is by specific cell arbitrary disposition, by the predetermined particular value configuration of the operation of the use of the radio resource in order to change neighbor cell, by the request configuration of neighbor cell or via the negotiation configuration between community.

In addition, specific cell notice neighbor cell the subframe not being used to the specific time sequence of the predetermined communication determined or to can be defined as flexible sub-frame with low transmitted power for the subframe of the specific time sequence communicated.Depend on realization example, can flexible sub-frame be realized by the type in the middle of the type that comprises blank subframe, almost blank subframe (ABS), zero energy ABS, non-zero power ABS and MBSFN sub-frame.

Therefore, from specific cell (such as, macrocell) receive about after the information of the subframe by ABS frame type or MBSFN sub-frame type configuration or the information about the subframe configured by aforesaid flexible sub-frame, neighbor cell (such as, picocell) can be configured to use subframe for any use according to the load condition of neighbor cell.Under these circumstances, ABS subframe can correspond to zero energy ABS or non-zero power ABS.

If the DL subframe on the SIB of specific cell is defined as flexible sub-frame exceptionally, then can flexible configuration subframe to send the specific reference signals (such as, CRS) being used to send in traditional DL subframe equally.Under these circumstances, the type being configured to the specific reference signals sent in flexible sub-frame according to the present invention can be restricted to the reference signal (such as, CRS or CSI-RS) that the RLM/RRM (radio link monitoring/provided for radio resources management) that is used to traditional UE operates.Further, the CRS being configured to send in flexible sub-frame can be configured to the form with the CRS sent in the MBSFN subframe.Such as, the CRS sent in flexible sub-frame can be configured to have the form of the CRS such as do not sent in PDSCH region and the CRS only sent in PDCCH region.In addition, via predefined signal, mutually can share between the base station and the user equipment and configure relevant information with the radio resource of aforesaid specific time sequence or flexible sub-frame.

Further, if the DL subframe on the SIB of specific cell is defined as flexible sub-frame, then the specific reference signals (such as, CRS, CSI-RS) being used to send in traditional DL subframe instead of send in flexible sub-frame can be configured.Under these circumstances, via predefined signal, the information of the configuration of the application of aforementioned about whether, information etc. about the reference signal being configured to not send in flexible sub-frame mutually can be shared between the base station and the user equipment.

According to the present invention, if the DL subframe on the SIB of specific cell be defined as flexible sub-frame and specific reference signals (such as, CRS) be configured to send in flexible sub-frame, then consider the interference sent flexible sub-frame received from the specific reference signals of specific cell, use flexible sub-frame as UL use or DL use neighbor cell can be configured to by rate-matched (RM) operation or perforation (PC) operational applications in reference signal.In addition, via predefined signal, the information about flexible sub-frame, the information about rate-matched or the information about perforation can be shared between the base station and the user equipment.

According to the present invention, specific cell can via the configuration information of predefined signal notice neighbor cell about the specific reference signals sent in flexible sub-frame.Such as, about the configuration information of the specific reference signals of specific cell can comprise from by select the following group formed at least one: the transmitted power of the type of the number of antenna port, physical cell identifier, virtual subdistrict identifier, reference signal, configuration index and reference signal.Specific cell can use predefined signal to notify neighbor cell configuration information.Or, consider the interference received from specific reference signals, use wherein specific reference signals to use the neighbor cell of the flexible sub-frame be sent out to configure as UL or DL data communication position that 0 transmitted power is assigned to the resource element (RE) that reference signal is sent to.In addition, exemplarily, about the configuration information of specific reference signals, under these circumstances, the information about the application of corresponding rule or the information about rule, can share between the base station and the user equipment mutually via predefined signal.

Further, specific cell can be configured to notify neighbor cell not only about the information of the information of flexible sub-frame but also the use about flexible sub-frame.Under these circumstances, consider the information of the UL/DL load condition from each neighbor cell that neighbor cell receives, determined arbitrarily the use of flexible sub-frame by specific cell.Or, can with the use by specific use flexible configuration subframe of predefined or the mode of consulting between cells.

In addition, specific cell can be configured to, send a notice neighbor cell not only about the information of flexible sub-frame but also about the information of resource area (such as, Resource Block (RB) or subframe) providing quite a large amount of interference from specific cell using the situation of flexible sub-frame.Such as, by UL control channel (PUCCH) transmission region, specific reference signals (such as, CRS or CSI-RS) transmission region etc. of specific cell, the resource area providing quite a large amount of interference from specific cell can be defined.Especially, can in flexible sub-frame by UCI (such as, UL A/N, CSI (RI/PMI/CQI)) definition specific cell UL control channel transmission region, and the region that can be sent out to keep the RLM/RRM of traditional UE to operate by reference signal in flexible sub-frame define specific reference signals transmission region.

In addition, according to the present invention, if time synchronized or synchronizing sub-frame are not mated mutually between cells, then specific cell can notify that neighbor cell is configured the information of the sequential of practical application and is sent to the information of neighbor cell by specific cell about the UL-DL upgraded.Such as, after having received the information about radio resource from specific cell, neighbor cell can be configured to send the response message in response to upgrading UL-DL configuration information, and configures the response message of sequential of practical application in response to the UL-DL upgraded.

Further, according to the present invention, based on time synchronized or the synchronizing sub-frame of specific cell, the information about the flexible sub-frame by notice neighbor cell, specific cell can be configured to only to be sent to the neighbor cell that its difference is less than predetermined threshold.The set shared about the community of the information of flexible sub-frame mutually comprising specific cell can be defined as synchronous set of cells.

Especially, under the heterogeneous network situation that macrocell and picocell coexist, if Virtual network operator is with the time synchronized difference between the picocell of the inside of the communication zone at macrocell and macrocell or synchronizing sub-frame is poor is kept the mode configuration network being less than predetermined threshold, then can define synchronized cells set by the picocell of inside of macrocell and the communication zone that is positioned at macrocell.

Further, decode with each community or follow the tracks of the predefined synchronizing signal of different neighbor cell or the mode of reference signal (such as, CRS, CSI-RS), synchronized cells set can be formed.Especially, each community is extracted difference from the time synchronized between community and different districts or synchronizing sub-frame and difference is shared between cells mutually via predefined signal (such as, X2 interface).By doing like this, synchronous set of cells can be configured to form in a distributed manner and be formed.Therefore, method synchronized cells set can be formed in a distributed manner via the negotiation between the cooperation between community or community.Or, also can form synchronized cells set via the cooperation between community/consult with dynamic-form.

Figure 13 is the figure of the synchronized cells set for configuring according to the present invention.

With reference to Figure 13, assuming that the heterogeneous network situation that macrocell and picocell coexist.Macrocell, picocell #A and picocell #B are defined as synchronized cells set.In fig. 13, assuming that the UL-DL based on SIB of macrocell configures and the UL-DL based on SIB of picocell configures corresponding to UL-DL configuration #1.

According to the embodiment of Figure 13, SF# (n+3) and SF# (n+4) is configured to flexible sub-frame and notifies to belong to the information of synchronous adjacent picocell about flexible sub-frame (that is, SF# (n+3) and SF# (n+4)) of set of cells by macrocell.Therefore, picocell can use flexible sub-frame (that is, SF# (n+3) and SF# (n+4)) in the mode of the use changing flexible sub-frame, the interference occurred due to different communication directions do not received from macrocell.

And, according to the present invention, if the UL subframe that specific cell signal is sent on SIB is designated as ABS (such as, zero energy ABS or non-zero power ABS) or MBSFN sub-frame form, the neighbor cell then having received signal can be configured to use subframe (that is, the UL subframe on SIB) for any use according to the load condition of neighbor cell.Such as, aforesaid subframe can be defined as aforesaid flexible sub-frame.

According to the present invention, due to the different communication direction between community, can exist and comprise the mutually different sub-frame set of interference characteristic.First, according to the present invention, consider the type of interference or the kind of interference, multiple subframe is divided into the sub-frame set of predefined number.Middle at least partially configuration one or more channel condition information (CIS) inference of the sub-frame set in the middle of the sub-frame set of predefined number and reporting operations.Or, the sub-frame set in the middle of the sub-frame set of predefined number at least partially in can configure one or more Interference Estimation operation or channel condition information (CIS) process.

Such as, when macrocell and the picocell of inside of communication zone that is positioned at macrocell coexist, can suppose that picocell only performs according to cell load status change the operation dynamically changing the use of radio resource, macrocell specific sub-frame is appointed as ABS (such as, zero energy ABS or non-zero power ABS) and macrocell sends corresponding information to picocell.

Under these circumstances, (predefined number) multiple sub-frame classification can be become two sub-frame set (that is, gathering #A and set #B) by picocell.Set #A and set #B can be configured to the sub-frame set of the position being appointed as ABS respectively and be appointed as the sub-frame set of position of non-ABS.In addition, can based on the sub-frame classification configuration that whether there is the interference configuration picocell coming from macrocell.

Especially, because there is not the interference or little interference that receive from macrocell and the interference only existed among set #A between picocell, so multiple channel condition information (CSI) inference and reporting operations can be configured in set #A due to ABS configuration.Or Interference Estimation operation or channel condition information (CSI) process can be configured in set #A.Such as, if there is the little interference received from macrocell, and the interference in the interference the DL subframe of service picocell received from the subframe dynamically changing adjacent picocell or the DL subframe of service picocell received from the subframe of the adjacent picocell that static state uses is only relatively strong in set #A, then can in set #A configuration two channel condition information (CSI) inferences and reporting operations.

On the contrary, because the interference be configured between the interference ratio picocell coming from macrocell in set #B due to non-ABS is relatively strong, so channel condition information (CSI) inference and reporting operations (or Interference Estimation operation or channel condition information (CSI) process) can be configured in set #B.

Therefore, in the present invention, in the middle of the sub-frame set of predefined number, only multiple channel condition information (CSI) inference and reporting operations can be performed in a part for specific sub-frame set.Or, the operation of multiple Interference Estimation or channel condition information process in a part for the sub-frame set in the middle of the sub-frame set of predefined number, can be configured.

Especially, the multiple channel condition information of wherein configuration (CSI) inference in the middle of the sub-frame set of predetermined number and the sub-frame set of reporting operations can be limited to the static DL subframe used (such as, DL subframe on SIB) or change the DL subframe (the DL subframe such as, on SIB) of use of its DL subframe.Certainly, the sub-frame set of the multiple Interference Estimation operation of the wherein configuration in the middle of the sub-frame set of predefined number or channel condition information (CSI) process can be limited to the DL subframe of the static DL subframe used or the use changing its DL subframe.

According to the present invention, when macrocell by ABS (such as, zero energy ABS or non-zero power ABS) be restrictively set to only by picocell static state use DL subframe time, if wherein multiple channel condition information (CSI) inference in the middle of the sub-frame set of predefined number and reporting operations, Interference Estimation operate and at least one sub-frame set be configured of channel condition information process is limited to the static subframe used, then sub-frame set also can be indicated to be limited to the DL subframe being only appointed as ABS by macrocell.

According to the present invention, in the middle of the sub-frame set of predefined number, wherein at least one sub-frame set be configured of multiple channel condition information (CSI) inference and reporting operations, Interference Estimation operation and channel condition information process can be configured to be limited to the subframe being appointed as ABS (such as, zero energy ABS or non-zero power ABS) by macrocell.In addition, sub-frame set can be configured to be limited to and is appointed as the DL subframe of ABS, the subframe being appointed as non-ABS by macrocell or DL subframe by macrocell.

In addition, can be widely used to define for the configuration of aforesaid sub-frame set the sub-frame set that one of them channel condition information (CSI) inference in the middle of the sub-frame set of predefined number and reporting operations, Interference Estimation operation or channel condition information process be configured.

According to the present invention, when macrocell and the picocell of inside of communication zone that is positioned at macrocell coexist, when picocell only perform according to cell load status change tread change the operation of the use of radio resource, specific sub-frame is appointed as ABS (such as by macrocell, zero energy ABS or non-zero power ABS) and corresponding information is sent to picocell signal, at least one in channel condition information (CSI) inference and reporting operations, Interference Estimation operation and channel condition information process can be applied independently.

Such as, assuming that configure with the sub-frame set of the position being designated as ABS the set #A and set #B that configure based on the kind of interference or the interference type of macrocell by the sub-frame set of the position being designated as non-ABS respectively.Under these circumstances, because to be communicated with the DL by macrocell the interference caused by the communicate interference that causes of the UL of macrocell because non-ABS is configured in set #A to exist, so can consider and to be communicated with the UL by macrocell the interference caused by the communicate interference that causes of the DL of macrocell in set #A, configure multiple channel condition information (CSI) inference and reporting operations, Interference Estimation operate and at least one in channel condition information process.On the contrary, because do not exist because ABS is configured in set #B or there is little interference, so at least one in channel condition information (CSI) inference and reporting operations, Interference Estimation operation and channel condition information process can be configured.

At least one or multiple situation in the middle of the situation of the situation of the situation that previous embodiment of the present invention can be widely used in " differently configuring the UL-DL configuration information about SIB between cells ", " nonideal backhaul or desirable backhaul situation " and " predefined radio resource channel sending and the relevant information that cooperates between cells ".

Further, previous embodiment of the present invention is only applied to the situation that configuration dynamically changes the pattern of the use of radio resource with can being configured to being limited property.

Further, embodiments of the invention can be widely used in the situation of the operation performing the use changing radio resource based on the predefined period.Further, the present invention can be widely used in the situation dynamically changing the radio resource of specific cell or certain components carrier wave (CC) when applying carrier aggregation scheme.

In addition, according to the present invention, embodiments of the invention can be widely used in the situation of the use dynamically configuring and change the radio resource on expansion carrier wave when using expansion carrier wave (or new carrier type) for communicating based on carrier aggregation scheme.

Previous embodiment of the present invention can be widely used in macrocell and picocell uses the situation of identical channel strip or macrocell and picocell to use the situation of adjacent channel strip.

Further, previous embodiment of the present invention can be widely used in situation that macrocell and picocell coexist or only picocell situation about existing.Such as, the present invention can be widely used in picocell and use the channel strip or the relative situation away from the channel strip executive communication of picocell that are different from the channel strip of macrocell.

Previous embodiment of the present invention has proposed to apply various method of the present invention.The party's ratio juris is also included in the scheme proposed by the present invention.

Figure 14 is the figure of the example for the base station and subscriber equipment being applicable to embodiments of the invention.If comprise repeater in a wireless communication system, then between base station and repeater, perform the communication in back haul link and the communication performed between repeater and subscriber equipment in access link.Therefore, repeater can be replaced by according to situation base station illustrated in the accompanying drawings or subscriber equipment.

With reference to Figure 14, wireless communication system comprises base station (BS) 110 and subscriber equipment (UE) 120.BS 110 comprises processor 112, memory 114 and radio frequency (RF) unit 116.Processor 112 can be configured to the function, process and/or the method that realize being suggested.Memory 114 is connected processor 112 and then stores the various information relevant with the operation of processor 112.RF unit 116 is connected processor 112 and sends and/or receive radio signals.Subscriber equipment 120 comprises processor 112, memory 124 and radio frequency (RF) unit 126.Processor 122 can be configured to the function, process and/or the method that realize being suggested.Memory 124 is connected processor 122 and then stores the various information relevant with the operation of processor 122.RF unit 126 is connected processor 122 and sends and/or receive radio signals.Base station 110 and/or subscriber equipment 120 can have individual antenna or multiple antenna.

Above-described embodiment corresponds to the combination of the factors and characteristics of the present invention of true-to-shape.Further, unless clearly mentioned, otherwise can think that each key element or feature are optionally.Can not realize each key element or feature with the form of other key elements or Feature Combination.In addition, by key element and/or feature partly being combined, embodiments of the invention can be realized.The order of the operation that each embodiment of the present invention is explained can be revised.Some configurations of an embodiment or feature can be included in another embodiment, or can be configured by the correspondence of another embodiment or feature replacement.Further, obviously it is to be appreciated that configure embodiment by the claim in claims without specific reference relation is carried out combination, or can by modifying after submit applications and comprising embodiment as new claim.

Various means can be used to realize embodiments of the invention.Such as, hardware, firmware, software and/or its any combination can be used to realize embodiments of the invention.By in the realization of hardware, the method that can realize according to each embodiment of the present invention by least one selection from following formed group: ASIC (application-specific integrated circuit (ASIC)), DSP (digital signal processor), DSPD (digital signal processor), PLD (programmable logic device), FPGA (field programmable gate array), processor, controller, microcontroller, microprocessor etc.

When by firmware or software simulating, the method that can realize according to each embodiment of the present invention by the module for performing above-mentioned functions or operation, process and/or function.Software code is stored in a memory cell, and then can be driven by processor.Memory cell is provided at portion in or beyond processor, with by various known approaches and processor swap data.

Although described and illustrated the present invention with reference to the preferred embodiments of the present invention, to those skilled in the art it is apparent that without departing from the spirit and scope of the present invention, various modifications and variations can be made.Therefore, the present invention is intended to contain the modifications and variations of the present invention fallen in appended claims and equivalency range thereof.

industrial applicibility

Although describe the method and equipment thereof of sharing radio resource in a wireless communication system with reference to the example being applied to 3GPP LET system, it can be applicable to various wireless communication system and 3GPP LTE system.

Claims

1. in multi-cell wireless communication system, share a method for the radio resource information of community, comprise the steps:

Described radio resource information is sent to neighbor cell; With

In response to described radio resource information from described neighbor cell confirmation of receipt message,

Wherein, described radio resource information is corresponding to the information of use being used to the radio resource changing particular radio resource region, and wherein, described acknowledge message is corresponding to indicating whether the message allowing the use changing described radio resource in described adjacent community.

2. method according to claim 1, wherein, based at least one in the interference volume of the uplink-downlink communication load states of described neighbor cell and the expection on described particular radio resource region, determine described acknowledge message by described neighbor cell.

3. method according to claim 1, wherein, sends described acknowledge message based on predefined physical radio channel or X2 interface.

4. method according to claim 1, wherein, described particular radio resource region is configured to make described neighbor cell not perform uplink-downlink communication.

5. method according to claim 1, wherein, described acknowledge message instruction does not allow the change of the use of described radio resource on described particular radio resource region, and comprises the step receiving recommended radio resource use change information from described neighbor cell further.

6. method according to claim 1, wherein, described radio resource information comprises the information configured about at least one or multiple uplink-downlink (UL-DL), and wherein, described acknowledge message comprises the information of the specific UL-DL configuration allowed about the described neighbor cell in the middle of configuring at described at least one or multiple UL-DL.

7. method according to claim 1, wherein, the time synchronized difference that described neighbor cell corresponds to itself and described community is less than the community of the threshold value of regulation.

8. method according to claim 1, wherein, described radio resource information comprises the information of the number of the subframe of the change about the use wherein performing described radio resource.

9. method according to claim 1, wherein, described particular radio resource region comprises the radio resource being used to send and receive specific reference signals.

10. method according to claim 9, wherein, specific reference signals according to predefined reference signal configuration information configuration, and wherein, described reference signal configuration information comprises from by least one of the selection following formed group: the transmitted power of the type of the number of antenna port, physical cell identifier, virtual subdistrict identifier, reference signal, configuration index and reference signal.

11. methods according to claim 1, wherein, described radio resource information comprises at least one in the use of the subframe of specific time sequence and the described subframe of described specific time sequence.

12. methods according to claim 11, wherein, described radio resource information comprises further about the information in the uplink control transmissions region of Serving cell or the information about specific reference signals transmission region.

13. methods according to claim 1, wherein, the change of the use of described radio resource is configured to use the radio resource being configured for uplink communication for downlink communication, or uses the radio resource being configured for downlink communication for uplink communication.

14. methods according to claim 1, wherein, described radio resource information comprises the information of the resource utilization about described particular radio resource region further.

The method of 15. 1 kinds of shared radio resource information in multi-cell wireless communication system, comprises the steps:

Described radio resource information is received from specific cell;

The change of the use of the radio resource allowing described specific cell is determined whether based on described radio resource information and uplink-downlink communication load states; And

The acknowledge message of the change of the use of described radio resource is allowed to be sent to described specific cell by indicating whether,

Wherein, described radio resource information is corresponding to the information of use being used to described specific cell and changing the radio resource in particular radio resource region.