TW201251352A - Method for interference reduction in a radio communication system, first radio access network node, second radio access network node and mobile station thereof - Google Patents

Abstract

The invention relates to a method for interference reduction in a radio communication system (RCS). The radio communication system (RCS) comprises a first cooperating transmission antenna system (CTA1) provided by at least two antenna arrays (AA1, AA2) and a second cooperating transmission antenna system (CTA2) provided by at least two further antenna arrays (AA3, AA4). The method comprises the steps of transmitting from the first cooperating transmission antenna system (CTA1) first radio frequency signals by a first coordinated multipoint transmission (CMT1) to a first mobile station (MS1), and adapting at the second cooperating transmission antenna system (CTA2) at least one transmit weight for a second coordinated multipoint transmission (CMT2) with second radio frequency signals (RFS2) from the second cooperating transmission antenna system (CTA2) to a second mobile station (MS2) based on a channel state of an interference channel (IC) of the second radio frequency signals between the second cooperating transmission antenna system (CTA2) and the first mobile station (MS1) providing interference to the first radio frequency signals. The invention further relates to a first radio access network node (RA-NN1), to a second radio access network node (RA-NN2) and to a mobile station (MS1, MS2) for use in the radio communication system (RCS).

Description

201251352 VI. Description of the Invention: TECHNICAL FIELD OF THE INVENTION The present invention relates to wireless communications, and more particularly, but not exclusively, to interference reduction in radio communication systems. [Prior Art] Current cellular mobile communication systems (e.g., 3GPP LTE systems (lte = Long Term Evolution)) rely on ΜΙΜΟ antenna technology (10) M 〇 = multiple input multiple output to achieve high spectral efficiency. In addition, a frequency reuse is typically applied to make full use of the available rare system bandwidth. This results in a strong imbalance in the achievable user rate throughout the cell. In addition, inter-cell interference becomes a major limitation of the performance of the cellular system. Techniques such as CoMP (c〇Mp=coordinated multipoint) deal with this problem. In CoMP, a number of distributed antenna arrays belonging to a same base station or belonging to a different base station and encompassing a specific coverage area (such as a radio cell or a radio sector) represented as one of the following cells are grouped To form a so-called cooperative cluster of one of the extended coverage areas. The cooperative cluster allows simultaneous downlink transmissions from one of the distributed antenna arrays located in different cells to one of the mobile stations or allowed to be transmitted at the antenna array for uplink in one of the mobile stations RF signal - simultaneous uplink reception. The extended coverage area includes the coverage areas of all cells of the cluster. This allows a distributed system to be formed across the entire collaborative cluster (which is also known as the network port). The cooperation between the cells of the cluster can alleviate cell edge problems, such as inter-cell interference between clustered cells. Ϊ 63458.doc 201251352 The traditional proposed linear precoding approach for downlink network MIMO results in a joint weight calculation for one of the entire cooperative clusters. Using the ideal channel state information at the transmitter, this may allow for complete suppression of inter-cell interference within the cluster. However, at the edge of the cooperative cluster, the algorithms mentioned are not designed to account for interference with users belonging to adjacent clusters. SUMMARY OF THE INVENTION The method of coordinating a multi-point transmission from a cooperative cluster to a mobile station incurs interference between radio frequency signals and further affects a total data rate in a radio communication system. Accordingly, it is an object of the present invention to reduce interference between radio frequency signals and to increase the overall data rate in a radio communication system. This object can be achieved by a method of reducing interference in a radio communication system. The S-Hai radio communication system includes a first cooperative transmission antenna system provided by at least two antenna arrays and a second cooperative transmission antenna system provided by at least two further antenna arrays. The method includes the steps of: transmitting, by the first coordinated transmission antenna system, the first radio frequency signal to a first mobile station by using a -coordinated multi-point transmission; and based on the second cooperative transmission antenna system and the Adapting a channel-channel state of one of the second radio frequency signals providing interference to the first radio frequency signal between the mobile stations to adapt at least one transmission weight at the second cooperative transmission antenna system for the second radio frequency Signal from the second cooperative transmission antenna system to a second mobile station - second coordinated multi-point transmission β, the first cooperative transmission antenna system and the second cooperative transmission antenna system may also be referred to as a first coordinated transmission 163458 .doc -6- 201251352 Antenna system and second coordinated transmission antenna system. =:: by means of a first radio access network node, by a type-'., a line access network node and by means of a mobile station for use in a radio system Achieved. The method according to the present invention provides a benefit of not only reducing interference to transmission from a cooperative transmission antenna system to a particular cooperative cluster number, but also reducing the self-input +. RF signal-to-location... The transmission antenna system is transmitted to the further mobile station between the adjacent cooperative cluster and the specific cooperation cluster. The radio access network is responsible for the cooperative cluster. The nodes can be executed independently;; the scheduling decision of the RF signals transmitted from the 4 cooperative transmission days (4). As a transmission antenna system, there is always a benefit: increase the number of radio communication systems - to - people, this is due to the reduction of interference can also reduce the retransmission rate, located at the boundary between the 乍 clusters The need and generalization of the mobile station is attributed to the reduction of interference 'one-way adaptation can potentially select a higher coding scheme' to further increase the data rate in the system. - Preferred embodiment 'Adjustment step can be advanced Based on at least the radio access resource parameter for the first point=passing wheel. This provides an excellent W for long-term viewing, making the second coordinated multi-point transmission suitable for radio storage. Multipoint transmission for a longer period of time = two ranges.) This allows for consideration of at least one radio access resource for adapting at least - transmission rights to inter-cluster interference. 163458.doc 201251352 This can be done, for example, by the following steps: · Monitoring the antenna core of a special macro 4S-α乍 transmission antenna system at the second system: the internal radio frequency signal is transmitted from the first-cooperative transmission hole 糸.4, and the second frequency is used in the second main frequency. Sub-wheel antenna system

The method of material (4) is adapted to the transmission of the second cooperative recording line system. In addition, the n, J ^ έ ... need to be transmitted from the first cooperative transmission. One of the network nodes to the > ..., one of the parameters of the power access resource is sent to the second cooperation. One of the network nodes of the Han antenna system. In a preferred embodiment, the first cooperative transmission antenna system assigns «being a cluster and the second cooperative transmission antenna system is assigned to a second "cluster cluster" and the method further comprises the steps of: judging by the first cooperative cluster疋 at least - a radio access resource parameter; and transmitting the information of the at least one radio access resource parameter to the second cooperative cluster, for example, via a back-to-the-half cooperative cluster. This provides _ advantage: The second coordinated multi-point transport is adapted to radio access resource parameters (such as currently applied to one of the first coordinated multi-point transmission time slot, a frequency sub-carrier block or a spread spectrum code). In the long run, the cooperative transmission antenna system can not only adapt to its transmission to the second mobile station to reduce interference towards the first mobile station located in the adjacent cooperative cluster, and can access the radio access resources in the continuous time slot in the short term. Varyingly assigned to the first mobile station. This increases the flexibility at the second cooperative transmission antenna system to other time slots that are not currently used for scheduling the S-first mobile station Or other frequency ranges reduce interference towards further mobile stations located in adjacent cooperative clusters. In addition, one of the first-cooperative clusters cooperates with one of the antenna systems at the complex 163458, doc 201251352 degrees can be reduced and erroneously detected First—the probability can be eliminated in one of the frequency domains. In the embodiment, the first-cooperative cluster and the octa-cluster cluster are temporarily synchronized and before the first brother~', the first cooperative cluster. The cluster performs the adaptation step - the pre-defined little - the radio access resource parameter is applied to the radio access resource of the first coordinated multi-point transmission, and the second coordinated multi-point transmission is adapted. Thus, the probability of generating any interference power for the =number of hearts can be reduced in advance. In the embodiment of the frequency, the method further includes the step of measuring the channel state at the second cooperative cluster. In an alternative embodiment, the method further comprises the steps of: based on the squat link training/pilot symbols or the subscription key data symbols, for example by estimating the second cooperative transmission antenna system between the disk turrets of - a downlink key radio channel and information on the channel status at the first mobile station, the information of the channel status is transmitted from the first mobile station to the first cooperative cluster; and from the first cooperation cluster The information of the channel status is transmitted to the second cooperative cluster. The first alternative allows when the cooperative transmission antenna system applies one downlink frequency range of the downlink radio signal to the downlink of the subscriber station and when When the uplink frequency range of the uplink (four) RF signal with the downlink key frequency range is applied to the uplink of the custom mobile station to the cooperative transmission antenna system, the method is applied, for example, to the -FDD case (touch = Frequency division multiplexing). This second alternative allows

An identical frequency range is applied to the downlink and uplink and performs an RF chain (RF = RF) calibration to generate uplink and downlink reciprocity (such as Sydney, Australia (Sydney, Australia). ISSPA,05 163458.doc 201251352 Μ· Guillaud, D. Slock and R. Knopp “A praetical Meth〇df〇r

The method is applied to a TDD case (TDD=time division multiplexing) according to a preferred embodiment, and the method further comprises the following steps: comparing the channel status of the interference channel And at least two predefined channel states; and selecting at least two predefined channel shapes L having the best match to the measured channel state, and wherein the information of the channel state includes One of the at least two predefined channel states is identified. The preferred embodiment allows for the reduction of channel state information via the first mobile station and the first cooperative cluster or the second cooperative cluster - a radio link between the network nodes - to signal or reduce channel-like tiling - a backhaul link between the network nodes between the cooperative cluster and the second cooperative cluster: In a preferred embodiment, the channel status information includes at least two spatial parameters for interference = (such as - Information about one of two absolute values and one phase value: a ramp vector or a channel matrix. This provides the following superior frequency, the first interference transmission antenna system coefficient between the cooperative transmission antenna system and the first mobile station, and the reduction of the radiation power at the second cooperative transmission antenna system mainly used for the interference channel. . In-and even further preferred steps: in the first shot, "going to further include the next F." is estimated to be one of the first cooperative clusters, the first one covering the first action in the Q and the first - 幻七·° locus' and wherein if the 163458.doc 201251352 first mobile station is identified at an edge between the first-covered area and one of the second covered areas, then the first The mobile station measures the channel status of the interference channel, for example, a GPS receiver determines an absolute location at an edge between the first coverage area and the second coverage area, and wherein the first mobile station includes the GPS Receiver. Alternatively, the edge between the first coverage area and the second coverage area may be estimated only from the received signal strength obtained from the handover measurements of the cells of the first cooperation cluster and the second cooperation cluster. This provides the following benefits: the measurement step is performed at the first mobile station and is limited to the & restricted area at the edge between the first coverage area and the second coverage area. Applying the adaptation step at the second cooperative transmission antenna system Thereby, only the first coordinated multi-point transmission is affected when there is a need for the first mobile station to approach one of the edges. Preferably, the 'identification includes the following sub-steps: comparing the first received from the first cooperative cluster - an average signal power level and a second average signal power level received from the second cooperative cluster and if the first average signal power level and one of the second average signal power levels reach a difference The limit value is estimated to be the first place on the edge of the 5th 5th edge. The location of the second coordinated multi-point transmission is further limited to the following cases. Wherein the first mobile station is near the edge 'and the interference from the second radio frequency signal reaches or exceeds a certain threshold. In another embodiment' the method comprises the steps of: transmitting from the second cooperative cluster - request Up to a first cooperative cluster to request transmission of an uplink sounding signal (such as an uplink key pilot) at the first mobile station; forwarding the request from the first cooperative cluster to the first mobile station; from the first Mobile platform I63458.doc 201251352 the uplink (four) sounding signals; and measuring the uplink keyway signal received via the interference channel at the second cooperative cluster. This provides the following benefits: · can directly in the second combination of the second cooperative cluster Measuring, by the receiving antenna system, a channel state of the interfering channel without signaling the channel state information from the first mobile station to the first cooperative cluster and routing the channel state information from the first cooperative cluster to the The second cooperation cluster. This embodiment is required by the FDD case, and in addition to measuring the channel state of the interference channel, this embodiment can also be used in a downlink direction for the TDD case. [Embodiment] Implementation of the present invention The examples will be apparent from the following detailed description, and will be explained by the accompanying drawings by way of non-limiting illustration. Figure 1 shows a radio communication system RCS comprising a radio access network Ran. For the sake of simplicity, the core network of the radio communication system RCS and the connection of the radio communication system RCS to further radio communication systems, to the internet or to fixed line communication systems are not shown. The radio communication system RCS can be, for example, a 3GPP LTE radio communication network using 〇FDM (〇FDM = Orthogonal Frequency Division Multiplexing). In a further alternative, the 'radio communication system RCS can be, for example, a 3GPP UMTS/HSPA radio communication network (UMTS = Global Mobile Telecommunications System, HSPA = High Speed Packet Access), based on, for example, the IEEE 802.16d standard (IEEE = Electrical and Electronic Engineer) Association) One of the WiMAX radio communication networks (WiMAX = Global Interoperability for Microwave Access) or based on one of the ugly 802.11@ standards, \\^八1^(\¥1八化无线地区网络). The radio access network RAN comprises a first radio access network node 163458.doc 201251352 -JNJNl, a second radio access network node ra_nn2 and a backhaul link BL (such as the first radio access network node ra_nni An m-axis cable or a fixed radio link between the second radio access network node rA_NN2). The backhaul link BL can be, for example, one of the interfaces used in 3GPP LTE or Evolved 3GPP LTE. The "radio access network node" may be considered synonymous and/or referred to as a base transceiver, a base station, a Node B, an enhanced Node B, an access point, etc., and may be described via a radio communication system Rcs and a A radio access device that provides connectivity by a radio link between multiple mobile stations. Further backhaul links between further radio access network nodes and those radio access network sites are not shown for simplicity. The first radio access network node RA_NN includes a first antenna array AA1 and a second antenna array ΑΑ2β, the first antenna array and the second antenna array AA2 are configured to provide a first-cooperative transmission antenna system And a first coordinated multi-point transmission cMT1 for the first radio frequency k from the first cooperative transmission antenna system CTA1 to one of the first mobile stations MSI. The second radio access network node RA_NN2 includes a third antenna array AA3 and a fourth antenna array AA4. The third antenna array aa3 and the fourth antenna array AA4 are configured to provide a second cooperative transmission antenna system CTA2 for the first radio frequency k number from the second cooperative transmission antenna system to a second mobile station MS2 - simultaneous The second coordinated multipoint transmission. body. The first antenna array AA1, the second antenna array AA2, the third antenna array AA3, and the fourth antenna array AA4 may be, for example, a passive antenna array on top of one of the antenna poles as shown in FIG. Amplifier). Alternatively, 163458.doc -13- 201251352 The first antenna array AA1, the second antenna array AA2, the third antenna array AA3, and the fourth antenna array AA4 may be radio remote heads, etc., having one or more power amplifier stages And connected to the first radio access network node RA-NN1 and the second radio access network node ra_nn2 via a fiber optic cable using the CpRI interface protocol (1) sputum = public radio interface). In a further alternative, the first radio access network node RA_Nm and the second radio access network node RA_NN2 may comprise a single antenna array or more than two antennas. The four (four) (four) nodes comprise only a single antenna array. At least two of the radio access network nodes are configured to provide a cooperative transmission antenna system, and preferably at least two of the radio access network nodes are designated as - a master and other radios The age of the access network is (four) ϋ. The decision is made (4), and the (4) transmission of the cooperation bundle (4) is transmitted and the information and related control information are transmitted to the slaves. The slaves receive the downlink data and perform a decision to provide cooperative retransmission for the subscription link data. ΑΑ1 provides coverage for the eight-deep I-hot cell Cell-AA]. The second antenna array AA2, the third antenna array AA3, and the fourth antenna array AA4 are provided for a second radio cell (10). Third Radio Cell (3) "Fantasy and Fourth Radio Cell (10) = Range. The term "radio cell" may be considered synonymous as a radio cell, cell, radio sector, sector, and the like. = a radio cell CelI Xian and the: radio cell (10) assigned to - the first cooperation cluster (four), and the third radio cell (10) · cut and 163458.doc 201251352 four radio cells Ce 丨 1-AA4 assigned to a second cooperative cluster C2. In a further alternative, three or more radio cells are assigned to the first cooperative cluster C1 and the second cooperative cluster C2. The first mobile station MSI may be located in a total coverage area of one of the first five clusters C1 provided by the aggregation of the first radio cell ce丨丨_ΑΑΐ and one of the coverage areas of the first radio cell Cell-A A2, and The first radio cell Cell-AAl and the second radio cell ceii_AA2 may be served by the first cooperative cipher ci. More specifically, the first mobile station MSI may be located in an overlapping area of one of the coverage areas of the first radio cell Cell-AAl and the second radio cell CeU_AA2 and in the total coverage area of the first cooperative cluster C1 and by the third radio One of the coverage areas of the cell Ce-AA3 and the fourth radio cell Cell-AA4 is aggregated at one edge between the total coverage areas of the second cooperation cluster C2. The second mobile station MS2 may be located within the total coverage area of the second cooperative cluster C2, and more specifically, the second mobile station MS2 may be located in the coverage areas of the third radio cell Cell-AA3 and the fourth radio cell Cell_AA4. An overlapping area. The first mobile station MSI may comprise a single antenna or an antenna array having one or more of two or more antenna elements. The second mobile station MS2 may comprise a single antenna or an antenna array having one or two or more antenna elements. The term "mobile station" is considered synonymous and may be hereinafter occasionally referred to as a mobile unit, mobile station, mobile user, access terminal, user equipment, user, user, remote station, and the like. The mobile station Ms can be, for example, a cellular phone, a portable computer, a pocket computer, a handheld computer 163458.doc -15- 201251352 brain, a number of assistants or a car mobile device β for simplicity not in the circle 1 Showcase further action stations. When the second radio access network node RA-NN2 transmits the second radio frequency signal to the second mobile station Ls2 by using the second coordinated multi-point transmission CMT2, the second cooperative transmission antenna system CTA2 and the first Interfering channel 1 between action two MSIs (: while receiving the second radio frequency signal at the first mobile station Msi. - when the first radio access network node RA-NN1 is transmitted by the first coordinated multi-point transmission CMT1 When the first radio frequency signal is transmitted to the first mobile station msi, the first radio frequency signals may be interfered by the second radio frequency signal and may thus cause the first radio frequency signal to receive quality degradation at one of the first mobile stations MSI. The interference effect 'the second radio access network node RA-NN2 is capable of adapting one or both of the antenna arrays AA3, AA4 of the second cooperative transmission antenna system CTA2 or both for the second coordinated multi-point transmission cmT2 Transmission weights, whereby the signal power can be reduced in one of the directions toward the first mobile station MSI. Meanwhile, the reception quality of the second radio frequency signal at the second mobile station MS2 should be maintained or at least only slightly Lower. The term "transmission weight" can be considered synonymous and can be occasionally referred to hereinafter as an antenna weight, beamforming weight, precoder, precoding weight, transmission _ precoder, etc. 〇 adaptation can be based on interference channel 1C - Channel state. Preferably, the adaptation may also consider one or several radio access resource parameters of the first coordinated multi-point transmission CMT1, such as: UMTS/WCDMA (WCDMA = wide frequency sub-163458.doc 16- 201251352 code multiple In the case of access or a slot such as one of TTI (TTI = Transmission Time Interval), the 'radio access resource parameter is a spreading code; in the case of Tdd and such as an application in LTE/〇FDMA (OFDMA = orthogonal division) In the frequency multiple access, the radio access resource parameter is a time slot (such as a subframe or a group of subframes); or in the case of FDD and such as in lte/〇fDMa, radio access resource parameters A subcarrier range and a time slot. More details regarding this adaptation will be given in accordance with Figure 2. Referring to Figure 2 'shows a flow diagram of a method MET 1 according to one of several alternative embodiments. Steps for performing method MET1 Number and It is not critical, and the order of the number of steps and the order of the steps can be changed without departing from the scope of the invention, and some of the steps can be performed simultaneously, for example, steps M1/11 & M1 /13&/or step M1/12& M1/14. Regarding the network node presentation method mET i shown in Fig. 1. In a first step M1/1, the first radio access network node RA- NN1 may transmit the first radio frequency signal RFS by means of the first coordinated transmission antenna system CTA1 by the first coordinated multi-point transmission CMT1, for example, according to several consecutive PRBs (PRB = physical resource blocks) such as those used in 3GPP LTE ( The data including the first linear precoding is transmitted to the first mobile station MS 1. In the case of a 3GPP LTE, the first radio frequency signal RFS1 for the first mobile station MS1 is one ΤΤΙ (ΤΤΙ = transmission time interval) and has one group of 12 adjacent OFDM subcarriers and is 5 kHz. One frequency subrange of one subcarrier interval is allocated to each PRB. The TTI of one of the lengths of 1 ms is part of the radio frame of one of the lengths of 10 ms. The frequency subrange of 丨8〇 kHz is part of the bandwidth allocated by one of, for example, 5 MHz. Prb's Telecommunications 163458.doc •17· 201251352 One of the time positions in the box and one of the frequencies within the allocated bandwidth of the PRB may be consecutive for the first coordinated multi-point transmission CMT1 to the first mobile station MSI The radio frame changes. In the case of 3GPP LTE, prb is a so-called radio access resource parameter for the first coordinated multi-point transmission CMT. By using other transmission techniques for the first coordinated multi-point transmission CMT1, the characteristics of the radio access resource parameters may be in a single parameter, such as: applying one of the spreading codes in the UMTS, a time slot (eg, if a fully allocated The bandwidth is permanently used for the first mobile station) and/or a subcarrier range (eg, if all TTIs of a radio frame are permanently used for the first mobile station). All available locations of the PRBs within the radio frame and the allocated bandwidth can be identified by a sub-frame number and a sub-carrier group number. The first radio frequency signal RFS1 can carry, for example, an IP packet (IP = Internet Protocol) downloaded from a video server of the Internet (such as Youtube.com) to the first mobile station MS. For the sake of simplicity, the uplink signal radio signals from the first mobile station MS 1 to the first radio access network node RA-NN1 are not shown. In a second step m/2 and at the same time 15, the second radio access network node RA NN 2 may be via the second cooperative transmission antenna system c τ A 2 by means of a second coordinated multipoint. The CMT2 is transmitted and the second radio frequency signal RFS2 (which includes the second linear precoding data) is transmitted to the second mobile station MS2 by a number of consecutive pRBs. The second RF signal RFS2 can carry you, for example, Ip packets from a caller to the second mobile station MS2 for the call (VoIP = Ip voice)... Simple is not shown in Figure 2 from the second action Taiwan (four) to the second radio access network section 163458.doc -18- 201251352

Uplink radio signal Q of point RA-NN2 The first mobile station MSI may initially receive only the first radio frequency signal RFS 1 at the next step M1/3 because the first mobile station MS 1 can be located in the first cooperative cluster The center of one of the total coverage areas of ci and therefore the second radio frequency signal is very weak at the start of the first mobile station MSI. Next, the first mobile station MSI can move toward the edge between the total coverage areas of the first cooperative cluster C1# second cooperation cluster C2. At the next step M1/4, the first mobile station MSI can receive the first radio frequency signal RFS 1, and further receives the second radio frequency signal RFS2»the second radio frequency signal RFS2 with the receiving system first with a considerable power increase. The mobile station Msi has become an indication of one of the victims from one of the interference signals adjacent to the second cooperative cluster C2. In a further selection step M1/5, the first mobile station MSI preferably estimates one of the first mobile stations MS1 in one of the first cooperative clusters C1, and wherein the specific mobile station can be at a specific receiving power A total coverage area of one of a group of radio cells is observed for the received power within the range given for that location. The estimate may be, for example, by comparing the first average power level of the first pilot and the second pilot received from the first cooperative cluster C12, the first radio cell Cell-AAl and the second radio cell CeU_AA2, and the self-adjacent The third cooperative cell C2, the third radio cell CeU_AA3, and the fourth radio cell Cell-AA4 receive the third pilot and the fourth pilot second average power level. Depending on a difference between the first average received signal power level and the second average received signal power level M5TL2, the first mobile station MSI can estimate whether the first mobile station MSI is located at 163458.doc • 19· 201251352 The total coverage of a cooperative cluster ci is far from the edge of the total coverage area of the first cooperation cluster ci and the second cooperation cluster C2, or the first-action hall is positioned close to the first cooperation cluster C1 and the second cooperation cluster. The edge of the total coverage area. If the difference between the signal power value of the first average received signal and the signal power level of the second average received signal reaches a predefined threshold (such as the difference is less than 6 dB): ARSPIA- ARSPL2< 6dB (]) The first mobile station MS 1 may, for example, determine a location of the first mobile station μ S 1 that is close to the edge of the total muting area of the first cooperative cluster c丨 and the second cooperative cluster C 2 . In the next step Μ 1/6, the first mobile station MS1 measures the channel state of the interference channel ic by determining the spatial parameter of the interference channel 1C. According to Fig. 3, the first mobile station MSI and the second mobile station MS2 may comprise a transceiver MS-TR. The transceiver MS-TR may comprise a combiner CB for combining the first radio frequency signal RFS 1 or the second received by the antenna element of the antenna array of the first mobile station MSI or the second mobile station MS 2 RF signal. The transceiver MS-TR may further comprise a channel estimator processing unit CE for estimating an actual transmission channel H_real for one of the first coordinated multi-point transmission CMT1 or the second coordinated multi-point transmission CMT2 Channel coefficient H_est. The transceiver MS-TR may further comprise a quantization processing unit QU for quantizing the estimated channel coefficients H_est into quantized channel state information H_qt. The estimated channel coefficient H_est can be applied to the combiner CB to recover the received first RF signal RFS 1 or the second RF signal RFS2 within 163458.doc • 20· 201251352 /亍 link issue number and/or downlink user data. The line array AA3 and the fourth antenna array (4) include 2 antenna elements... - the subscription station includes a single antenna, and the channel estimator can be determined, for example, from the third antenna array AA3 and the fourth antenna array AA4 to f The first channel of the ordering station MS1, H channel, j 2 2i % h 1 ΑΑ4-1'1 "4-2, the absolute value of the 1 and the four complex values of the phase ΜΙΜΟ Channel coefficient: vmeas = (- Λ44_ι,ι,λ一weaj绍 21)(7) • 〇 can measure the synchronization channel and/or, for example, in a downlink shared channel (such as LTE - DSCH (DL_SCH = Downlink Shared Channel)) The pilot of the time and frequency. In the alternative, if the first radio frequency k received at the first mobile station MS} is mainly interfered by the second radio frequency signal RFS2 transmitted by the third antenna array AA3, the first The mobile station deletes the wMIM〇 channel coefficient from the third antenna array a to one of the first channel vectors of the first mobile station MSI. In a further alternative, if the third antenna array aa3 and the fourth antenna array AA4 include 2 Sky and line components and the first mobile station MS1 also includes one of two antenna elements In the line array, the first mobile station MS1 determines 8 channel coefficients of the first channel matrix of one of the interference channels 1C. Preferably, only the total coverage area of the first cooperation cluster 〇1 and the second cooperation cluster C2 is limited. The location of the first mobile station MS1 is identified at the edge between the first mobile station MS1, and the channel state of the interference channel IC is measured. In a further optional step M1/7, the quantization processing unit 〇1; comparable 163458. Doc -21 - 201251352 For example, the determined channel vector vmeas and two or more predefined channel vectors vdef j of one of the predefined channel vectors given by the following equation: Constructive, W, A-Fresh (7). Vector quantization techniques can be used to generate a codebook for a predefined orientation or pre-defined matrix that has a channel table as an element. Illustratively, such as defined for 3GPP TS36. Closed-loop linear precoding codebook in 2U Release 10, whereby 'at the first radio access network node rA_nn丨 and the second radio access network node RA-NN2 and at the first mobile station MS 1 And application at the second mobile station MS2 Precoding based on codebook. The comparison between the determined channel vector and the predefined channel vector Vdefj can be performed, for example, by calculating a minimum Euclidean distance using the following equation: diffj = J|vdei, J-vmm| 2 = lXj-h_measAA, 2>1)2 (4) _ ' Alternatively, as by July 1st to 5th, 2007, M〇bile and

Wireless Communications Summit, 2007. 16th 1ST, Vol. x No. x 1-5 Qiang Li; Georghiades, C N rprec〇der Quantization for MIMO-OFDM Systems over Frequency

Calculating a minimum chord distance is described in Equation 4 of the section "Chordai distance quantization" in SeleCtWe Channels, which is incorporated herein by reference. I63458.doc -22, 201251352 In a further alternative, a vector quantization technique can be based, for example, on July 1-5, 2007, Mobile and Wireless Communications Summit, 2007. 16th 1ST, Vol. x 1-5 Qiang Li; Georghiades, CN "Precoder Quantization for MIMO-OFDM Systems over Frequency Selective Channels", "Minimum Mean Squared Error Quantization" and "Vector Quantization", one of the minimum mean square error quantization or a vector quantization It is also incorporated herein by reference. In the next selection step M1/8, the quantization processing unit qu can select one of the predefined channel states having the best match to one of the measured channel states of the interfering channel 1C by using, for example, the following equation: v_bestmatch = Argmin difft (5) One of the alternative ways of Ml/7 and Ml/8 can be based on τ. Wild "A rake-finger based efficient channel state information feedback compression scheme" in "Pr〇ceedings 〇f the IEEE VTC spring 2010" And completed, which is incorporated herein by reference. Here, one of the primary taps of the primary tap that removes the frequency domain dependent redundant time domain channel impulse response is completed. In addition, feedback is divided into short-term elements and long-term elements. Both effects result in a strong compression of one of the desired feedback rates. In a further step M1/9, the first mobile station MS1 transmits the interference channel 1 (the channel state information cSI_MS j to the first radio access network node RA_Nm in a vector value format or a matrix value format. In this transmission, the first mobile station MS1 can transmit, for example, a channel vector % 乂 娜 I I63458.doc • 23· 201251352 channel coefficient; ^3ί, ;^ -, 丨々4~丨, 1, and heart 4 2,1. The channel strength information CSI-MS1 can be transmitted to the flute ^ 7 逼 状态 资 第 第 天线 天线 天线 天线 天线 天线 天线 天线 天线 天线 天线 天线 天线 ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; The channel status information CSI-MS1 ϋ $ converts both the first antenna array AA! and the first antenna array ΑΑ 2. The channel status information can also be shaken by the rabbit CDI (CDI = channel direction information). In an alternative , the first action a Μς (four). The coffee can transfer the - finger to the first radio access network "RA_NN1, then use the item as the channel state to provide the interference channel ^ measurement - the best match ^ select the step M " 8 selected channel state information of the predefined channel state H_qt. The indicator may be similar, for example, to one of the 3Gpp LTE bribe (10) precoding matrix indicators. The use of predefined channel vectors or predefined channel matrices and information about predefined channel vectors or predefined channel transitions by channel status information One of the CSI-MS1 signals a so-called explicit feedback. Alternatively, a predefined precoding vector can be used and the information about the precoding vector can be signaled by the channel state information CSI-MS1. This is a so-called hidden With feedback, a precoding vector is identified based on a particular metric (eg, maximizing one of the throughputs in the system). The second radio access network node RA-NN2 may be hidden when receiving channel state information CSI_MS1 The feedback-containing feedback is converted to a definite feedback to estimate interference channel 1 (: channel state 0 or 'any other way to describe the channel state for method MET1 (eg, based on analog feedback: no quantization is applied but signaled t63458.doc -24 · 201251352 continuous complex value coefficient). Preferably, the first mobile station MSI will one or several of the second cooperative cluster C2 The cell ID (ID = indicator) is further transmitted to the first radio access network node RA-NN1. If the third radio cell CeU_AA3 provides much more interference to the first mobile station MSI than the fourth radio cell CeU_AA4 (eg The difference between the interference powers received at the MSI of the first mobile station is higher than a predefined threshold. Then a single cell ID and a single channel state information may be transmitted, for example, for the third radio cell Cen_AA3. The cell Cell-AA3 and the fourth radio cell CeU-AA4 provide a similar interference to the first mobile station Msi (for example, the difference between the interference power received at the first mobile station MS1 is lower than the predefined threshold), then the transmission can be transmitted. Two cell IDs of the two radio cells. In the next step Μ1 /10, the channel state information CSI-MS1 is received at the first radio access network node RA-NN1. In a further step M1/11, the first radio access network node RA-NN1 identifies one of the neighboring cooperative clusters received from the first mobile station MS1 and controls one of the master cooperative radio access network nodes of the neighboring cooperative cluster. Channel status information CSI-MS1. In the first alternative, the first radio access network node ra-NNI receives the average of the first radio cell Cell-AAl and the second radio cell cEU_AA2 reported by the first mobile station Ms i. The signal power is estimated from, for example, the average received signal power of the first radio cell 1 and the first radio cell Cell-AA2 reported by the first mobile station MS 1 , for example, one of the first mobile station MS 1 facing the third cooperation cluster C2 Move I63458.doc -25- 201251352 Direction. The second radio access network node RA-NN2 is obtained by comparing the moving direction of the first mobile station MSI with a digital geographic map storing one of the neighboring radio access network nodes and a look-up table first radio access network node RA_NN1 It is identified as the master responsible for the adjacent cooperative cluster C2. In a second alternative, the first radio access network node rA_nni can simply use the cell ID reported with respect to the channel status information and from the first mobile station MS1 to access the second radio access by using a lookup table. The network node RA-NN2 is identified as the master. In a third alternative, the first radio access network node RA-NN1 can be received by using the first mobile station MS 1 and received by the first antenna array A A1 and the second antenna array AA2. The uplink signal performs a triangulation to estimate a location of the first mobile station MS1, and the second radio access network node RA-NN2 can be identified as a master by using a lookup table. In a fourth alternative, a neighbor relationship can be detected based on the MS's handover measurement. D. Aziz, A. Ambrosy, L. Ho, L. Ewe, M. Gruber, H. Bakker "Autonomous Neighbor Relation", as in "Bell Labs Technical Journal 15(3), 63-84 (2010)" Detection and Handover Optimization in LTE" and "International Workshop on Self-Organizing Networks IWSON VTC2011-Spring Budapest" by C. Mueller, L. Ewe, H. Bakker "Evaluation of the Automatic Neighbor Relation Function in a Dense Urban Scenario" The described method enhances two references for enhancing spontaneous proximity. In the next step Μ1 /12, the scheduler of the first radio access network node RA-163458.doc -26- 201251352 NN1 determines the next transmission of the first radio frequency signal RFS1 to the first mobile station MSI. One or more radio access resource parameters. The one or more radio access resource parameters may be, for example, an allocation to a mobile station, or a number of PRBs, such as applied in 3GPP LTE. Preferably, the first radio access network node ra_nni takes the information of the one or more owing radio access resource parameters from the scheduler, the one or more wireless electronic devices; the source parameter is used for the information To the second radio access network node RA-view-transmission. The information may be, for example, an index assigned to the corresponding PRB of the first mobile station. Preferably, for example, by adapting the clocks of the first radio access network node RA-NN1 and the second radio access network node RA-NN2 to one of the first no-electrical access network nodes RA_NN1 First Gps Receiver (Gps = Global Positioning System) or from a first GTS Receiver (GTS = Global Transport Service) and from a second Receiver or First GTS Receiver of the second Radio Access Network Node RA_NN2 The obtained time signal or the first radio access network node ra_nn 1 and the second radio access network by using an IEEE 1 588 precise time protocol (as needed in conjunction with an accurate local oscillator, such as 铷 based) The node RA_NN2 is temporarily synchronized and thereby temporarily synchronizes the first cooperative cluster C1 and the second cooperative cluster C2. In a further step M1/13 (see FIG. 3), the second mobile station MS2 can base the second RF signal scale received at the first mobile station MS2 by using the channel estimation treatment unit CE The second coordinated channel multi-point transmission cMT2 is estimated to be the second channel coefficient. In the next step Μ 1/14, the second mobile station MS2 can quantize the second MIM 〇 channel coefficient by using the processing unit QU (see step 1^1/8 above) using the amount 163458.doc • 27- 201251352 (see step 1^1/8 above). . In a further step M1/15+, the second mobile station MS2 can preferably transmit the channel status information CSI-MS2 as quantized channel status information to the second radio access network node RA VII N2. In a further step M1/16, the first radio access network node RA-NN1 transmits or forwards the channel state information CSi_msi of the interfering channel 1 (to: the second radio access network node RA-NN2. Preferably The first radio access network node rA_nn1 further transmits one or more radio access resource parameter information RAR_INF〇 to the second radio access network node RA_NN2. More preferably, one or more radio access resource parameters The information RAr_jNF〇 further includes a time stamp for the next first coordinated multi-point transmission CMT 1. After performing a first coordinated multi-point transmission CMT1 刖 first radio access network to the first mobile station MS1 The node RA-NN1 may transmit one or more radio access resource parameters to the third radio access network node RA-NN2 for a predefined time period. For example, the predefined time period may be calculated by the following equation: TP predefined · ^predefined a TTBL + + (6) Its center, .. by the backhaul link BL from the first radio access network node RA-NN1 to the second radio storage (four) way node ra - smooth - average pass No. I63458.doc -28- 201251352 crTM · is used to perform an average processing time for one of the transmission weight calculations for the second coordinated multipoint transmission cmt2 at the second radio access network node RA-NN2. W. The guard time in the case of a jam on the return muscle or in the case of a second radio save. Take the delay at the network node RA_NN2. • In the alternative, equation (6) may not include the guard time added. In a further step Μ1Π7, information on the interference channel 1 (the channel state of the channel and the preferred one or more radio access resource parameters) is received at the second radio access network node RA-NN2. In one step M1/18, one of the transceivers NN-TR of one of the second radio access network nodes RA-NN2, the precoder p (see FIG. 2), is based on the channel state information csi received from the first mobile station MS2. - MS2 and adapted to one of the second coordinated multi-point transmissions to one of the second mobile stations MS2 based on the interference channel 1 (: channel state information CSI-MS1 received from the first radio access network node RA-NN1) CMT2 to be applied to the second cooperative transmission antenna One or several transmission weights at the CTA 2. The adaptation may be calculated at the pre-program P using a third antenna for a second coordinated multi-point transmission CMT 2 below the second mobile station MS 2 using, for example, the following equation The transmission weights of the antenna elements of the array AA3 and the fourth antenna array AA4 are completed by WmS2.

WMS2 = argraax WMSJ _PMS2_ A / cr J + ij lag + Ip, following (7) where the transmission weight per MS WMS2 represents one of the number of columns with the number of antenna elements corresponding to the respective cooperative cluster I63458.doc • 29· 201251352 Complex value row vector. The transmission weight ~2 may be changed by subcarrier or subcarrier set or multiple access resources, or the transmission weight wMSS may be calculated for the entire frequency band. The transmission weight Wmsz will also change over time. : useful signal power at the input of one of the combiner CBs of the transceiver of the second mobile station MS2, MS, MS2, channel vector or channel matrix between the second cooperative transmission antenna system CTA2 and the second mobile station "" For example, the HS, MS2, W: - matrix or vector can be provided by reporting the second channel state information csi_ms2 (see M1/16 in FIG. 2) from the second cooperation station MS2 to the second cooperation cluster 〇2. Number, from: number of receiving antennas at the second mobile station MS2, %. The noise power and interference power from the additional interference clusters measured at the second mobile station MS2. It should be noted that if there are different mobile stations If one of the heights is not balanced, then it is recommended to normalize all the new values to the same value (for example, 'conformity') and rescale the channel coefficients of each mobile station so that - The corresponding SNR value (SNR=signal-to-noise ratio) remains unchanged. fekWMS2l: all other representations that are located within the cooperative cluster C2 and are clustered by the port C2 and based on the same multiple access resources (such as an identical PRB) The interference caused by the Friends of the Action Desk (4) The sum of the rates, within

Hs'k. The channel between the cooperative-transmitted antenna system CTA2 and one of the other mobile stations located in the cooperative cluster C2 and cooperating with the C2 servo is 163458.doc 201251352 or the channel matrix; for example, The other mobile station provides HS k for reporting channel status information to the second cooperative cluster C2. @2= j|%VwMS2|| : The interference power caused by the MSI located in the first mobile station adjacent to the cooperative cluster, and the _walking motion located in the adjacent cooperative cluster Cl (not shown in Figure 1) The further interference power caused by the station and the summation of even further interference power caused by even further mobile stations located in further neighboring cooperative clusters (also not shown in Figure 1) included in the user set,

Hs,v: for example, a channel vector or a channel matrix between the second cooperative transmission antenna system cta2 and the first mobile station MS1 located in the first cooperative cluster ci and served by the first cooperative cluster C1; for example, Reporting the first channel state h & fl C SI - M S1 from the first mobile station node RA-NN1 to the second radio access network node ra-NN2 of the second cooperative cluster C2 via the first mobile access network node RA-NN1 And provide H sv. Equation (7) is followed by M. Sadek et al., "A Leakage-based precoding scheme for downlink multi-user MMO", May 2007, Wireless Communications, IEEE Transactions on Wireless Communications, Vol. 6, No. 5, pp. 1711-1721. One of the channels discussed is based on the principle of leak precoding. The leak-aware precoding scheme optimizes the transmission of a set of weights WMS2 to maximize a SLNR (SLNR = signal leakage plus noise ratio). Equation (7) can be solved as a general intrinsic value problem in a closed-form solution that is completed in the literature cited above in the multi-user mim case. The transmission weight WMS2 is preferably repeated for a prb or a number of PRBs. By 163458.doc -31- 201251352, for example, the information to be applied to the next first coordinated multi-point transmission CMT1 or the plurality of radio access f source parameters is considered in the following manner: r INFO 多个 or multiple radios The access resource parameter information RAR_INF〇 tells the second radio access network node RA_NN2 to have a 15 kHz 〇FDM subcarrier spacing and 12 〇FM subcarriers from a first frequency range of 2U0.00 elbow 1^ to 2110.18 MHz - PRB applies the sub-frame index defined by - to a first coordinated multi-point transmission cMT1 under the first mobile station MSI. If the second cooperative cluster C2 is to be applied to the second coordinated multi-point transmission CMT2 under the second mobile station MS2 for the same time period and the same PRB has the same frequency range from 21 1 〇 〇〇 MHz to 21 10.18 MHz Then, the second benefit line access network node RA_NN2 will apply equation (7) to calculate the transmission weight WmS2. If the second cooperative cluster C2 is to be applied to the second coordinated multi-point transmission CMT2 to the second mobile station MS2 for a time period and will not occur to the first coordinated multi-point transmission CMT1& / or _PRB has a different frequency range (such as from 2110.36 MHz to 2115.54 MHz), then the second radio access network node ra_Nn2 will apply the following equation (8) without, for example, 2 = term: WMS2 = argmax -- (8) wMfii ^ση + , AiS2 As can be understood by those skilled in the art, if more than one mobile station is located at the edge between the first cooperative cluster C1 and the second cooperative cluster C2 and the second cooperative cluster C 2 Adapting two or more coordinated multi-point transmissions of I63458.doc -32- 201251352 based on the channel status of two or more interfering channels

To two or two or more mobile stations, 3GPP LTE TDD radio access technology with additional method steps such as downlink transmission and uplink transmission in the same frequency range may be performed. Operate the radio communication system RCS. In a further step M2/1, the first mobile station MS1 can measure the pilot and determine, for example, to further servo the first mobile station MS 1 for further radio cells and for potentially performing the first cooperation cluster Searching for a further radio cell, such as the first radio cell Cell-AAl and the second radio cell, to the SINr value of the further cell of the cooperative cluster handed over by one of the second cooperative clusters C2 (SINR = signal interference plus noise ratio) The third radio cell Cell-AA3 and the fourth radio cell Cell-AA4 in one of the cells of Cell-AA2. In the next step M2/2, the first mobile station MS 1 may transmit the SINR value and the cell identifier of the third radio cell CelI-AA3 and the fourth radio cell Cell-AA4 in a report REPORT to the first radio storage. Take the network node RA-NN1. Preferably, the report REPORT may further include information of the received power of the third radio cell Cell-A A3 and the fourth radio cell Cell-AA4 163458.doc -33 - 201251352. In the next step M2/3, the first radio access network node RA_NN1 receives the report REPORT. In a further step M2/4, the first radio access network node RA_NN1 compares, for example, the received SINR value with a SINR threshold and/or compares the received received power level with a received power threshold. And analyze the report REPORT information. In the next step M2/5, for example, if the received SINR value of the third radio cell cell_AA3 has reached the threshold value, the first radio access network node RA-NN1 may transmit an indication IND to the second radio storage. Take the network node RA-NN2. The indication IND may include information from the first cooperative cluster (the MSI served by the first cooperation cluster C2). In addition, the indication IND indicates that the second radio access network node Ra_NN2 can measure from the first The mobile station MS1 transmits one of the uplink pilot sequences. The information may include, for example, one of the pilot sequence numbers used in 3GPP LTE (eg, 'formed by a basic sequence and cyclic shift and (if needed) sequence hopping parameters) Preferably, the information may further comprise a mobile station identification number of the first mobile station MS1. In a further step M2/6, the second radio access network node RA-NN2 receives the indication IND. The second radio access The network node RA_NN2 indicates that the reception of the IND may be a prompt for the first mobile station MS 1 to be at one of the cluster edges between the first cooperative cluster C1 and the second cooperative cluster C2.

The second radio access network node RA-NN2 may determine that one of the interference channel IC 163458.doc • 34- 201251352 between the second cooperative transmission antenna system CTA2 and the first mobile station MS1 is required to reduce the second radio frequency signal The power level in the direction from the second cooperative transmission antenna system CTA2 toward the first mobile station ms1. In a first alternative, the uplink pilot sequence of the first mobile station MS 1 or the first radio access network node is automatically transmitted from the mobile station MS 1 during a first predefined time interval. RA_NN 1 requests the uplink pilot sequence, and the second radio access network node ra_NN2 can listen to the uplink pilot sequence and can measure the uplink pilot sequence. In a second alternative, if the second radio access network node RA-NN2 is not capable of receiving an uplink pilot sequence within a second predefined time interval, then the second radio in a next step M2/7 The access network node RA-NN2 may send a request REQ1 including one of the mobile station identification numbers to the first radio access network node RA-NN1 to request transmission of the uplink sounding pilot at the first mobile station MSI. Requesting reqi may further include transmitting a timestamp of one of the uplink sounding pilots. In a further step M2/8, the request REq is received at the first radio access network node RA-NN1. In the next step M2/9, if it is allowed to transmit the line key detection k number from the first mobile station MS1, the first radio access network node rA_nni can be verified and can be determined that the first mobile station MS 1 should The time period during which the uplink key detection pilot is transmitted (at a time according to the time of reception a - time or at a different time determined by the first radio access network node RA-NN1) allows the transmission. In the progression step M2/10, the first radio access network node RA NN1 transmits a request for transmitting the uplink (four) pilot - request REQ2 or I63458.doc -35 - 201251352 will be from the second radio access network node RA The request REQ1 received by the -NN2 is forwarded to the first mobile station MS 1. Requesting REQ1, REQ2 may include transmitting a timestamp of one of the uplink sounding pilots. In the next step M2/11, the first mobile station MS1 receives the requests REQ1, REQ2. In a further step M2/12, the first mobile station MS1 preferably transmits the uplink sounding pilot USP at a time corresponding to one of the received time stamps. In the next step M2/13, the second radio access network node RA-NN2 receives and measures the uplink sounding pilot usp. The second radio access network node RA-NN2 measures the channel of the interfering channel 1C by determining the spatial parameter of the interfering channel IC similarly to the step Μ1/6 performed by the first mobile station MS1 during the method MET1 status. In the next step M2/14 instead of step M1/16, the first radio access network node RA-NN1 transmits one or more radio access resource parameter sKRAR-INFO to the second radio access network. Node RA_NN2. Preferably, the information of the one or more radio access resource parameters further includes a time stamp for one of the next first coordinated multi-point transmission CMT1. In a further step M2/15, the second radio access network node RA-NN2 receives information RAR-INF0 of one or more radio access resource parameters. Referring to FIG. 5, a radio access network node RA_NN (such as the first radio access network node RA-NN1 and the second radio access network node RA-NN2) may include - a first radio remote control header - a second radio remote control head NN-RRH2, a first transceiver NN_TR1, a second receiving 163458.doc • 36 * 201251352 transmitter NN-TR2, a third transceiver NN-TR3, an external port PORT, a CPU (CPU = central processing unit) NN-CPU and a computer readable medium NN-MEM. The CPU NN-CPU is foreseen to execute a computer readable program NN-PROG. The first radio remote control head NN-RRH1 is connected to the first transceiver NN-TR1 by a first feed cable FC1, and the second radio remote control head NN-RRH2 is connected to the second by a second feed cable FC2 Two transceivers NN-TR2. The first radio remote head NN-RRH1 may include a first antenna element NN-RRH1-AE1 and a second antenna element NN-RRH1-AE2 for one of the wireless coverage areas of a first radio cell. The second radio remote control head NN-RRH2 may include a first antenna element NN-RRH2-AE1 and a second antenna element NN-RRH2-AE2 for one of the wireless coverage areas of a second radio cell. In a further alternative, the first radio remote head NN-RRH1 and the second radio remote head NN-RRH2 may comprise four or eight antenna elements. In an even further alternative, the radio access network node RA-NN may comprise a single radio remote head or more than two radio remote heads. The first radio remote head RRH1 and the second radio remote head RRH2 are assigned to provide a combined transmission antenna system CTA for coverage of a dedicated cooperative cluster. In an alternative, the first radio remote head RRH1 and the second radio remote head RRH2 can be assigned to different combined transmit antenna systems and different cooperative clusters. The first transceiver NN-TR1 and the first radio remote head NN-RRH1 transmit downlink radio frequency signals, such as downlink signaling data and downlink user data, to the mobile station. The downlink signaling data may be, for example, 163458.doc -37-201251352, such as a request for transmitting an uplink sounding pilot, β in a reverse direction, a first transceiver NN-TR1 and a first radio remote control head. The NN-RRH1 receives uplink RF signals (such as uplink signaling data and uplink user data) from the mobile station. The uplink signaling material can be, for example, channel state information CSI-MS1, CSI-MS2 or uplink sounding pilot UPS. The third transceiver NN-TR3 is connected to the external port. The external PORT PORT is used to connect the radio access network node RA_NN to a further radio access network node RA-NN (see Fig. 1) via the backhaul link 8. The third transceiver NN-TR3 is used to transmit the channel status information CSI_MS1, CSI-MS2 and/or one or more radio access resource parameter information RAR-INFO to the further radio access network node. The second transceiver NN-TR3 may be further used to transmit a request for requesting transmission of an uplink probe probe from a mobile station to a further radio access network node. In a reverse direction, a third transceiver is used. The NNTR3 receives the information RAR-INF0 of the channel status information CSI-MS1, CSI-MS2 and/or - or a plurality of radio access resource parameters. The third transceiver NN TR3 can be further used to receive a request for requesting transmission of an uplink key detection pilot from a mobile station. The computer readable medium NN_MEM foresees a lookup table for storing a computer readable program NN PR〇G and preferably for storing a predefined channel state and a radio access network node for the master of the adjacent cooperative cluster. The computer readable program NN-PR0G foresees the method MET 1 and MET2 which are implemented by the radio node 163458.doc •38· 201251352 to take the network node RA-NN. In particular, the computer readable program PRO-PROG can assign the first radio remote head RRm and the second radio remote head RRH2 of the radio access network node RA-NN to the cooperative transmission antenna system CTA, and can be based on cooperation Between the transmission antenna system CTA and a further mobile station providing interference to one of the interference channels, one of the interfering channel channel states, adapted to be at least one transmission weight at the transmission antenna system CTA for use in the radio frequency signal self-coupling transmission antenna system CT A To coordinated multi-point transmissions located in one of the mobile stations in the dedicated cluster, further radio signals are received by further mobile stations located in a neighboring cooperative cluster and by the adjacent cooperative cluster servos. Referring to FIG. 6, a mobile station MS (such as the first mobile station MS1 and the second mobile station MS2) includes an antenna system MS_AS, a transceiver ms_tr 'a CPU (CPU = central processing unit) MS-CPU, and a computer readable Take the media MLMEM. The CPU MS-CPU is foreseen to execute a computer readable program MS-PROG. The antenna system MS-AS comprises a first antenna element MS_AE1 and a second antenna τ means MS-AE2. Alternatively, the antenna system MS_AS may comprise an antenna element or more than two antenna elements. The antenna system MS-AS and the transceiver MS_TR receive downlink radio frequency signals, such as downlink signaling data and downlink user data. The downlink signaling material can be, for example, the request REQ1, REQ2 for transmitting the uplink sounding pilot. In a reverse direction, the antenna system MS_AS and the transceiving sMS_TR transmit uplink RF signals, such as uplink signaling data and uplink 163458.doc.39-201251352 user data. The uplink signaling material can be, for example, a channel state S-hole CSI-MS1, CSI-MS2 or an uplink sounding pilot USP. The computer readable medium MS-MEM is foreseen to store the computer readable program MS-PROG. The computer readable program MS_PR〇G foresees the steps for performing the methods MET1 and MET2 to be carried out by the mobile station MS. Specifically, the computer readable program MS-PROG can estimate one of the mobile station MSs in one of the cooperative transmission antenna systems of one of the RF signal servo stations MS, and if at least in the coverage area One of the further cooperative antenna systems provided by the two further antenna arrays further covers the location of the mobile station MS at an edge between the zones, and between the mobile station MS and the further cooperative transmission antenna system One of the further RF signals interferes with one of the channel states of the channel. BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a block diagram showing one of a radio communication network having two radio access network nodes and one of two mobile stations. Fig. 2 schematically shows a flow chart of a method according to a first embodiment. Figure 3 is a block diagram showing one of a transceiver of a radio access network node and a transceiver of a mobile station. Fig. 4 schematically shows a flow chart of a method according to a second embodiment. Figure 5 is a block diagram showing one of the radio access network nodes in accordance with an embodiment of the present invention. Figure 6 is a block diagram showing one of the mobile stations 163458.doc • 40- 201251352 in accordance with an embodiment of the present invention. [Main component symbol description] AA1 first antenna array AA2 second antenna array AA3 third antenna array AA4 fourth antenna array BL backhaul link C1 first cooperative cluster C2 second cooperative cluster CB combiner CE channel estimator processing Unit Cell-AAl First Radio Cell Cell-AA2 Second Radio Cell Cell-AA3 Third Radio Cell Cell-AA4 Fourth Radio Cell CMT1 First Coordinated Multicast CMT2 Second Coordinated Multicast CSI-MS1 Interference Channel 1C channel status information CSI-MS2 channel status information CTA combined/cooperative transmission antenna system CTA1 first cooperative transmission antenna system CTA2 second cooperative transmission antenna system FC1 first feeding cable FC2 second feeding cable 163458.doc •41 · 201251352 H_est Channel coefficient H_qt Quantization channel status information H_real Actual transmission channel IC Interference channel IND Indicates MS mobile station MSI First mobile station MS2 Second mobile station MS-AE1 First antenna element MS-AE2 Second antenna element MS- AS Antenna System MS-CPU Central Processing Unit MS-MEM Computer Readable Media MS-PROG Brain readable program MS-TR transceiver NN-CPU central processing unit NN-MEM computer readable media NN-PROG computer readable program NN-RRH1 first radio remote control head NN-RRH2 second radio remote control head NN- RRH1-AE1 first antenna element NN-RRH1-AE2 second antenna element NN-RRH2-AE1 first antenna element NN-RRH2-AE2 second antenna element 163458.doc •42· 201251352 NN-TR transceiver NN-TR1 first transceiver NN-TR2 second transceiver NN-TR3 third transceiver P precoder PORT external 埠 PRB physical resource block QU quantization processing unit RAN radio access network RA-NN radio access network Road node RA-NN1 First radio access network node RA-NN2 Second radio access network node RAR-INFO Radio access resource parameter information RCS Radio communication system REPORT Report REQ1 Request RFS1 First RF signal RFS2 Second RF signal TTI transmission time interval USP uplink detection pilot 163458.doc -43-

Claims (1)

201251352 VII. Patent application scope: 1 _ A method for reducing interference in a radio communication system (RCS), the radio communication system (rcs) including provided by at least two antenna arrays (AA1, AA2) a first cooperative transmission antenna system (CTA1) and a second cooperative transmission antenna system (CTA2) provided by at least two further antennas (A3, AA4), the first cooperative transmission antenna system ( CTA1) assigned to a first cooperative cluster (C1), the second cooperative transmission antenna system (CTA2) assigned to a second cooperative cluster (C2) 'The method (MET1, MET2) comprises the following steps: Coordinated Multipoint Transmission (CMT1) transmits (M1/1) the first radio frequency signal (RFS1) to a first mobile station (MSI) from the first cooperative transmission antenna system (CTA1), and the first cooperative cluster (C1) determining (M1/12) at least one radio access resource parameter, the at least one radio access resource parameter being used for one of the first radio frequency 4 (RFS1) to the first mobile station (MSI) Coordinated Multipoint Transmission (CMT1), The method (MET1, MET2) further comprises the steps of: transmitting at least one radio access resource parameter information (RAR-INFO) from the first cooperative cluster (C1) (Ml/16, M2/12) To the second cooperation. Cluster (C2), and based on the second interference between the second cooperative transmission antenna system (CTA2) and the first mobile station (MSI) to provide interference to the first radio frequency signal (RFSi) One of the radio frequency signals (RFS2) interferes with one of the channel states of the channel (1C), and adapts to the at least one radio access resource parameter (M1/18) at least one of the second cooperation 163458.doc 201251352 transmission antenna system (CTA2) Transmitting weights for the second radio frequency signal (RFS2) from the second cooperative transmission antenna system ((:1^2) to one of the second mobile station (MS2), second coordinated multi-point transmission (CMT2) And if the second cooperative cluster (C2) is to be applied to the second mobile station (MS2) in the same time period as determined for the further _ coordinated multi-point transmission (CMT1) and a same frequency range The second coordinated multi-point transmission (CMT2), the adaptation step is applied (Μΐ/ι8) β 2. The method of claim 1 (MET1, MET2), wherein: at least one radio in the case of (10) is / (10) VIII (Global Mobile Telecommunication System / Broadband Code Division Multiple Access) The access resource parameter is a spread spectrum code; in the case of TDD (time division multiplexing), the at least one radio access resource parameter is a time slot, a subframe or a group of subframes; or in FDD (frequency division) In the case of multiplex, the at least one radio access resource parameter is a subcarrier range and a time slot. 3. MET2), wherein the first cooperative cluster is as in the method of claim 1 (MET1 and wherein the second first cooperative cluster (C1) and the second cooperative cluster (C2) are temporarily synchronized, and the cooperative cluster (C2) is executed Before the adapting step, (C1) transmitting the resource (RAR-INFO) of the at least one radio access resource parameter for a predefined time. As in the method of claim 1 (MET1, MET2), the +) ts ts method (MET1 MET2) further comprising the steps of: measuring (v丨/6, M2/丨0) the channel of the interfering channel (IC) at the first-acting program or at the second cooperative cluster (four), If the channel status is measured at the first mobile station (MS1): the channel status information (CSI-MS1) is transmitted (M1/9) from the 163458.doc 201251352 first mobile station (MSI) to the a first cooperative cluster (C1), and if the information is received at the first cooperative cluster (C1), the information (CSI-MS1) of the channel status is transmitted from the first cooperative cluster (C1) (M1/ 16) to the second cooperative cluster (C2). 5. The method of claim 4 (MET1), wherein the method (MET1) further comprises the steps of: comparing (M1/7) the channel state of the interfering channel (1C) with at least two predefined channel states, and selecting (M1/8) having one of the at least two predefined channel states that best match one of the measured channel states, and wherein the information of the channel state (CSI-MS1) includes for the best One of the matched ones of the at least two predefined channel states is identified. 6_ The method of claim 5 (MET1), wherein the information of the channel status (CSI-MS1) further comprises at least one cell ID of the second cooperative cluster (C2) to use a lookup table to connect a radio The access network node (RA-NN2) is identified as one of the second cooperative clusters (C2). 7. The method of claim 5 (MET1), wherein the information of the channel status (CSI-MS 1) includes information for at least two spatial parameters of the interfering channel. 8. The method of claim 7 (MET1), wherein the at least two spatial parameters are an absolute value combined with one of the phase values, a channel vector or a channel matrix. 9. The method of claim 5 (MET1) 'where the method step package 163458.doc 201251352 comprises the following steps: estimating (M1/5) the first cluster (C1) at the first mobile station (MSI) One of the first coverage areas (Cell-AAl, Cell-AA2), one of the §Hai-Mobile Station (MSI), and wherein in the first coverage area (Cell-AAi, Cell_AA2) and the second Identifying the location of the first mobile station (MSI) at an edge between one of the second coverage areas (Cell-AA3, CeU_AA4) of the cooperative cluster (C2) is measured by the first mobile station (MSI) The channel status of the interfering channel (IC). 10. The method of claim 9 (MET1), wherein the identifying comprises comparing a first average signal power level received from the first cooperative cluster (C1) with a first received from the second cooperative cluster (C2) Two average signal power levels, and if the difference between the first average signal power level and the second average signal power level reaches a threshold, then the first mobile station (MSI) is assumed This site is at this edge. 11. The method of claim 9 (MET2), wherein the method (MET2) comprises the step of: transmitting a request (M2/4) from the second cooperative cluster (C2) to the first cooperative cluster (C1) Requesting to transmit an uplink sounding signal at the first mobile station (msi), transferring the request (M2/7) from the first cooperative cluster (C1) to the first mobile station (MSI), from the first A mobile station (MS 1) transmits (M2/9) uplink sounding signals, and measures (M2/10) at the second cooperative cluster (C2) to receive the uplinks via the interference channel (1C) Link detection signal. 163458.doc 201251352 12. A first radio access network node (RA_NN, ra-nni) for use in a radio communication system (R(:S), the first radio access network node (RA) -NN, RA-NN1) includes: for assigning the first radio access network node (RA-NN, RA-NN1) to at least two antenna arrays (NN-RRH1, NN-RRH2, AA1) AA2) A component (NN-PROG, NN-CPU) of a cooperative transmission antenna system (nn_CTa, CTA1) provided for transmitting a radio frequency signal (RFS1) to the coordinated multipoint transmission (CMT) The components of the mobile station (MSI) (NN-TR1, NN-RRH1, NN-TR2, NN-RRH2), and further coordination for determining the one to be applied to the radio frequency signal (RFS1) to the mobile station (MSI) a component of at least one radio access resource parameter (NN-PROG, NN-CPU) of the multi-point transmission (CMT1), wherein the first radio access network node (RA-NN, RA-NN 1) further includes Transmitting the information of at least one radio access resource parameter (RAR-INFO) to a component of a further radio access network node (RA-NN1) (NN-TR3, PORT), the further radio access network defect (RA-NN 1) is assigned to one of the further cooperative transmission antenna systems (CTA2) provided by at least two further antenna arrays (AA3, AA4). a second radio access network node (RA-NN, RA-NN2) used in a radio communication system (RcS), the second radio access network node (RA-NN, RA-NN2) comprising: Assigning a 6-first radio access network node (rA-NN, RA-NN2) 163458.doc 201251352 to one of the at least two antenna arrays (NN-RRH1, NN-RRH2, AA3, AA4) The components of the cooperative transmission antenna system (NN-CTA, CTA2) (NN-PROG, NN-CPU), and the cooperative transmission antenna system (NN-CTA, CTA2) by a coordinated multipoint transmission (CMT2) Transmitting a radio frequency signal (RFS2) to a component of a mobile station (MS2) (NN-TR1, NN-RRH1, NN-TR2, NN-RRH2), wherein the second radio access network node (RA-NN, RA) -NN2) further comprising: one of the further cooperative transmission antenna systems provided for freely providing at least two further antenna arrays (AA1, AA2) CTA1) A component (NN-TR3, PORT) that receives information (RAR-INFO) of at least one radio access resource parameter, the at least one radio access resource parameter being used for further radio frequency signal (RFS1) to a further mobile station (MSI) a further coordinated multi-point transmission (CMT1); and for providing the further radio frequency signal (RFS1) based on the cooperative transmission antenna system (NN-CTA 'CTA2) and the further mobile station (MSI) Adapting one of the radio frequency signals (RFS2) to one of the channel states of the interference channel (1C) and adapting at least one transmission weight of the cooperative transmission antenna system (NN-CTA, CTA2) for the at least one radio access resource parameter to be used From the cooperative transmission antenna system (NN-CTA, CTA2) to one of the mobile stations (MS2), a component of further coordinated multi-point transmission (CMT2) (NN-PROG, NN-CPU), by which further coordination Multipoint transmission (CMT1) and receiving the further radio frequency I63458.doc 201251352 signal (RFS1) from the further cooperative transmission antenna system (CTA1) at the further mobile station (MSI) and if the second cooperative cluster (C2) Will be judged The further coordinated first multipoint transmission (CMT1) i is applied to the second mobile station (MS2) in the same frequency range and the same frequency range in the same time period &> coordinated multi-point transmission (CMT2), Then adapt the at least one transmission weight. 163458.doc