Inter-cell power control for interference managment

FIELD: information technology.

SUBSTANCE: system provides for a combination use of open loop and closed loop PSD control algorithms. The open loop control is a function of path loss from the serving cell as well as the neighbouring cells. The closed loop control updates the end node transmit PSD by listening to the load indicators from the serving cell and at least one other neighbouring non-serving cell which generates the highest level of interference.

EFFECT: faster control using with multi-cell information and low inter-cell interference.

34 cl, 34 dwg, 5 tbl

 

Cross-reference to related applications

This application claims the priority of provisional patent application (USA) serial number 60/863,928, entitled "Method And Apparatus For Inter-Cell Power Control For Interference Management", which was filed November 1, 2006. The aforementioned application is completely contained in this document by reference.

The level of technology

The technical field to which the invention relates.

The subsequent description, in General, relates to wireless communications, and more specifically to the management mistaway power to regulate noise in OFDM system.

The level of technology

Typical scenarios of load control oriented or feedback control (closed loop) or without feedback (open loop). There are limited views regarding combining both types of control. In non-orthogonal systems, methods, embodying both types of control circuit adapted to systems with time division signals with spread spectrum and is designed for application on the one hundredth. In orthogonal systems there are two main schools of thought regarding the management of interference uplink communication. One camp management prefers PSD closed loop, while the other prefers the management of PSD open-circuited. Each sposobniye its advantages and disadvantages.

Generally, the methodology of the power control closed loop is very fast, and there is a feeling that almost no need in the way of control with open-circuited. However, there are problems with the accuracy of control with closed loop and that without proper starting point approach with closed loop may not be fast enough.

In the presented method of power control with open-circuited end node uses the measured received power along with typical values of certain parameters of the base station, to obtain a rough estimate of transmission losses between the end node and the base station. Based on these measurements, the transmission loss in a straight line is estimated and used to determine the proper setting of the power control to open the circuit for the transmitter of the target host. Power transmission target node is adjusted to match the estimated losses in the transmission path, to arrive at the base station at a predetermined level. All leaf nodes within a cell use the same process, and ideally their signal with equal power in the base station.

The parameters of the base station typically contain a correction factor(s)that should be used to the s by the end nodes when their estimate of the power of open loop current, as well as for the initial transmission on the access channel. There are traditional algorithms for estimation of the required power transmission target node for the first test message access channel access. It should be noted that the value of the constant power control with open loop depends on many dynamically varying parameters (including, for example, a layout cell, the network load, the location of the destination node within the cell). None of these dynamically changing variables is not known in advance, therefore, the power level of the first test message will likely be erroneous. Error can result in a much higher power level than is necessary to establish communication when the mobile station is close to the base station. When the power level is too high, it creates unnecessary interference to the remaining mobile stations, which reduces system throughput. On the other hand, if the mobile station is far away, she can pass the initial test message access at a very low power level, resulting in the sending of the additional test messages. In addition to increasing the time a call for more test messages lead to greater interference in the reverse link.

Area "g the urban canyons" also require improvements in management, if the geometry of the cell coverage can lead to dynamic and unreliable indicators of the load to the destination node moves within the region. The angle changes and the release of increased transmit power of a cell phone in the neighboring cell requires a better control mechanism, because management through a single serving cell is not enough.

Therefore, in order to maximize the efficiency of the user can be taken into account from the above explanations that the problem of interference from other cells and weak signals from the serving cell on the border of the cell should be considered in more detail for the required management methodology than is provided by current technology.

The invention

The following description presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This entity is not a comprehensive overview and is not intended to identify key or critical elements or to set the limits of such embodiments. Its purpose is to present some concepts of the described embodiments in a simplified form as a prelude to the more detailed description that is presented later.

In orthogonal systems megamovie interference sacaste the lead to inefficiency of the system with many cells. An aspect of the claimed subject matter provides a method of management that listens for commands load more than one cell. This allows the destination node to overcome the typical limitation of ignorance serving cell of interference caused by transmission of its terminals in other cells.

In the aspect, when the orthogonal uplink communication, megamovie interference dictate the floor in the cell. The coating should be evaluated and to control the ascending line of communication that does not use the advantages of HARQ and adaptation of the communication line, and for data uplink communication that take advantage from HARQ and can use or not to use the advantages of adapting the communication line depending on the speed of the UE. For most of the analysis of system-level, which is performed on the SI phase, the simulation does not consider the coverage of the control channels. 5%of the bandwidth of the user data is not an adequate indicator to dictate the actual coverage of the system, due to the advantages of HARQ and adaptation of the communication line in the UL shared channel data. For the effective functioning of the uplink communication megamovie interference must be strictly controlled through the network independently of the load in the uplink communication.

When orthogonal ascending line is communication, scenario one-hundredth, the UE can transmit at the maximum TX power without affecting the performance of the communication line other users. In scenarios with many hundreds, if this strategy UE on the border of the cell introduces significant interference to other cells, weakening the coating system. However, UE internal cell region typically do not cause interference to other cells. For stable and optimal operation of the system it is noted that UE internal cell region can transmit at a higher power or spectral power density than the UE at the cell boundaries. Therefore, it is necessary to remember two objectives of the regulation algorithm interference UL: 1) a means to reduce megamovie interference and 2) the flexibility of the scheduler to allocate bandwidth to different users. Additionally, traditional assumptions may include the fact that each UE has one serving cell in uplink communication, and that the serving cell is typically unaware of interference caused by transmission of its terminals to the other cells.

With high-level prospects of the proposed management PSD closed loop entails that each cell periodically transmits in broadcast mode, the load indicator in the ascending line (busy or not) on the downlink. It is each UE decodes bits indica is ora load, at least one dominant interfering cell (based on the measurement of losses in the transmission path), and UE accordingly reduces its valid spectral density TX-power. In more detail, the reference PSD (for example, PSD based on periodic known signal, such as CQI) is stored in the node and is used to control vnutrisajtovoj power. UE periodically reports the Delta PSD and supported bandwidth. Delta reference PSD is a function of the load indication from poslujivshih hundred, and it indicates the power reserve available in the UE, provided that assigned (provided) bandwidth for data transmission is equal to the bandwidth CQI. Supported bandwidth is calculated from the maximum transmit power and the TX PSD and specifies the maximum bandwidth that can be supported by the UE with the maximum limit TX-power, and PSD in which the UE transmits data. The site provides In assigning uplink communication, consisting of bandwidth (for example, the number of tones) and package format (for example, packet size and modulation). You should take into account that the bandwidth should be lower than the supported bandwidth. The UE transmits a packet in accordance with the purpose of the Delta PSD

Another aspect provides for the flexibility of the scheduler in reducing mistovich interference. The scheduler for each cell has the flexibility to select the variable bandwidth and power spectral density (PSD) of the destination nodes in its area. The scheduler can provide a higher transmission power for the target node in the center of the cell, if it is greater use of power does not cause interference with other cells.

Another aspect provides a method of using control open and closed loop. Through the use of first control PSD with open-circuited at the beginning of the end node problem the accuracy of the process closed loop attenuated. Once the initial target is set, control switches to the way closed loop, and the errors and uncertainties, associative associated with the process open loop, decrease.

In another aspect, when the destination node is experiencing a sharp change in the value of losses in the transmission path, the re-establishment of target values for control with closed circuit becomes similar to early use, and the method takes advantage of systems with both open, and closed loop.

Aspect provides free software is about, which simplifies the management of megamovie interference in OFDM system, comprising: using accept (Rxed) of the target signal, which applies indications of loss in the transmission path from the destination node to the serving node and the destination node to the neighboring poslujivshih nodes; the use of management PSD with open-circuited at the beginning of the end node or when a significant change of the loss function in the transmission path of the destination node; and a switching control PSD closed loop at the proper time.

Another aspect provides a machine-readable medium having stored thereon Mashinostroenie instructions for performing the following steps: using accept (Rxed) of the target signal, which applies indications of loss in the transmission path from the destination node to the serving node and the destination node to the neighboring poslujivshih nodes; the use of management PSD with open-circuited at the beginning of the end node or when a significant change of the loss function in the transmission path of the destination node; and a switching control PSD closed loop at the proper time.

Another aspect provides a processor that executes code to manage megamovie interference in OFDM system, and performs machinesplay code, stored on the media storage d is the R, to use accept (Rxed) of the target signal, which applies indications of loss in the transmission path from the destination node to the serving node and the destination node to the neighboring poslujivshih nodes; use the control PSD with open-circuited at the beginning of the end node or when a significant change of the loss function in the transmission path of the destination node; and a switch to control the PSD with closed circuit at the proper time.

Another aspect provides a system that facilitates management of megamovie interference in OFDM-based system that contains a tool for use accept (Rxed) of the target signal, which uses readings losses in the transmission path from the destination node to the serving node and the destination node to the neighboring poslujivshih nodes; means for using the control PSD with open-circuited at the beginning of the end node or when a significant change of the loss function in the transmission path of the destination node; and means for switching on the control PSD closed loop at the proper time.

In conclusion, the above and related aspects of one or more embodiments include the signs, hereinafter fully described and individually indicated in the claims. The following description and annexed drawings set forth in which atalah certain illustrative aspects and are pointing in several different ways, which can be applied the principles of the embodiments. Other advantages and new features should become apparent from the following detailed description, when considered together with the drawings and disclosed embodiments of intended to include all these aspects and their equivalents.

Brief description of drawings

Figure 1 is an illustration of a wireless communication system in accordance with various aspects presented herein.

Figure 2 is an illustration of an exemplary communication system (for example, cellular communication system), implemented in accordance with various aspects.

Figure 3 is an illustration of an exemplary system with many hundreds realized with various aspects.

Figure 4 is an illustration of an exemplary aspect mistovich interference administered this version of the application.

Figure 5 is a logical block diagram of the operational sequence of the method, illustrating various aspects.

6 is a logical block diagram of the sequence of operations of the method proposed management methodology with open and closed loop.

7 illustrates an exemplary end node (for example, mobile node), associative associated with various aspects.

Fig is an illustration of the use of the aqueous node access implemented in accordance with various aspects described in this document.

Figure 9 is a logical block diagram of the operational sequence of the method, illustrating various aspects.

Figure 10 represents the approximate initial bias power control with open loop, implemented in accordance with various aspects.

11 represents the results of tests in accordance with various aspects set forth herein.

Fig presents test results in accordance with various aspects.

Fig presents test results in accordance with various aspects.

Fig presents test results in accordance with various aspects.

Fig presents test results in accordance with various aspects.

Fig presents test results in accordance with various aspects.

Fig presents test results in accordance with various aspects.

Fig is estimated initial offset power control with open loop, implemented in accordance with various aspects.

Fig is estimated initial offset power control with open loop, implemented in accordance with various aspects.

Fig represents the t test results in accordance with various aspects, set forth in this document.

Fig presents test results in accordance with various aspects.

Fig presents test results in accordance with various aspects.

Fig presents test results in accordance with various aspects.

Fig is estimated initial offset power control with open loop, implemented in accordance with various aspects.

Fig is estimated initial offset power control with open loop, implemented in accordance with various aspects.

Fig presents test results in accordance with various aspects.

Fig presents test results in accordance with various aspects.

Fig presents test results in accordance with various aspects.

Fig presents test results in accordance with various aspects.

Fig is exemplary results in accordance with various aspects set forth herein.

Fig is exemplary results in accordance with various aspects.

Fig is exemplary results in accordance with various aspects.

Fig is exemplary results in accordance with various aspects.

Figure 4 represents an additional exemplary results in accordance with various aspects.

Detailed description of the invention

The following describes different ways, with reference to the drawings, in which identical reference numbers are used to refer to the same elements. In the following description for purposes of explanation, many specific details are set in order to ensure full understanding of one or more embodiments. However, it may be obvious that these implementation options can be implemented without these specific details. In other cases, common structures and devices are shown in the form of block diagrams in order to simplify the description of one or more embodiments.

In addition, various embodiments of described herein in connection with a wireless terminal. "Wireless terminal" refers to a device that provides voice and/or data to the user. Wireless terminal can be connected to a computing device, such as a portable computer or desktop computer, or may be a standalone device such as a personal digital device (PDA). A wireless terminal can also be called a system, subscriber unit, subscriber station, mobile station, mobile, remote station, access point, remote terminal, the terminal is the crimson access user terminal, user agent, user device, or user equipment. The wireless terminal may be a subscriber station, a wireless device, a cellular phone, a PCS phone, a cordless phone, telephone Protocol session initiation (SIP)station for wireless local loop (WLL), personal digital appliance (PDA), a portable device that supports wireless connections, or other processing device connected to a wireless modem.

The base station (e.g., access point) may refer to a device in the access network that communicates over the radio interface by means of one or more sectors of the wireless terminal. The base station can act as a router between the wireless terminal and the rest of the access network, which may include an IP network, by converting the received frame of the radio interface in IP packets. The base station also coordinates the regulation of attributes for the radio interface.

Moreover, various aspects or characteristics described herein can be implemented as a method, device, or product using standard programming and/or development. The term "product" when used in this document is ente has the intention to contain a computer program, accessible from any computer-readable device, carrier or medium. For example, machine-readable media may include, but not limited to, magnetic storage devices (e.g. hard disk, floppy disk, magnetic tape etc), optical disks (for example, compact disc (CD), digital versatile disk (DVD), etc.), smart cards, and flash memory devices (for example, EPROM, card, card, flash drive, etc...). Additionally, various storage media described herein may represent one or more devices and/or other machine-readable media for storing information. The term "machine-readable medium" can include, without limitation, wireless channels and various other media, allowing for the storage, disposal and/or transfer instructions(s) and/or data.

Referring now to Figure 1, the illustrated wireless communication system 100 in accordance with various implementation presented in this document. The system 100 provides a hybrid control with closed and open-circuited. The system 100 includes a base station 102 (N is the number of base stations, and N is an integer), wireless terminals (or user equipment (UE)) 104 (M is the number of wireless terminals, and M is an integer)corresponding to the controllers 106 power the spine, appropriate verifiers 108 of the wireless terminal corresponding to the Comparators 110 and the verification scheduler 120. In orthogonal systems megamovie interference often leads to inadequate system with many cells. Losses in the transmission path in communication with neighboring cells are estimated to simplify the reduction mistovich interference. The system uses control with open loop and closed loop with load indicator in order to reduce megamovie interference. In particular, it is provided a method of controlling wireless terminal 104, which listens for commands load more than one cell. Command load from the adjacent honeycomb can be transmitted through the air or they can be transferred through a serving cell via the data exchange between enhanced nodes In transit connection. This allows the destination node to overcome the typical limitation of ignorance serving cell of interference caused by transmission of its terminals in other cells.

Initially, when the wireless terminal 104 starts, it is controlled by the base station 102 via the control is open-circuited, to set the target power and the interference levels of the receiver. In addition, when the UE is included in the network or suddenly experiencing radical is the change in losses in the transmission path, its PSD transmission is regulated via an algorithm with open-circuited so as to assign a quick update on the basis of losses in the downlink (DL) transmission path. Algorithm with a disconnected circuit controls the level of interference to some extent in the sense that the attitude taken (Rxed) target signal-to-noise ratio (SNR) is made as a function of the losses in the transmission path to the serving cell and the neighboring neobsluzhvani satam. Because the algorithm with a disconnected circuit typically has strict control of interference introduced into another cell, the UE 104 later updates its PSD transmission by listening to indicators load from neighboring poslujivshih hundred. Command load from the adjacent honeycomb can be transmitted through the air or they can be transferred through a serving cell via the data exchange between enhanced nodes In transit connection. When the command load is transmitted via the radio interface, commands, lowering the load sent to the UE from the neighboring poslujivshih hundred, when they have a higher noise level compared to the target - otherwise, the increase is passed. UE 104 lowers its PSD transmission after she accepts commands decreasing; otherwise, it increases its PSD transmission. When the command load is transmitted through the exchange of data between usovershenstvovan the mi nodes In the transit connection, serving honeycomb regulates TX PSD for UE, respectively, based on the received commands load from neighboring cells. Regulation may relate to the categories of commands dispatch, or it can be performed by sending a service hundredth commands load in UE. You should take into account that the regulation of the PSD corresponding to the commands load, may not be so radical as control corresponding to an open circuit. Because the load indicators indicate the level of interference seen by other sites, strict control of noise can be achieved, and thus can be obtained fast and simple control of interference.

The scheduler 120 provides the flexibility of the scheduler in reducing mistovich interference - scheduler 120 for each cell has the flexibility to select the variable bandwidth and power spectral density (PSD) of the destination nodes in its field. The scheduler 120 may provide the use of higher transmit power for the target node in the center of the cell, where it is a greater use of power does not cause interference with other cells.

System 100 may include a base station 102 that receives, transmits, repeats, etc. wireless signals in the wireless terminal 104. Additionally, it is assumed that h is on, the system 100 may include multiple base stations, similar to base station 102, such as 102n2 and 102nN, and/or multiple wireless terminals, similar to the wireless terminal 104, such as 104m2 and 104mm. You should take into account that although the explanation is focused on a single station for clarity, aspects can contain multiple base stations and multiple wireless terminals. The base station 102 may contain a chain of transmitters and the chain of receivers, each of which, in turn, can contain many components are associated with the transmission and reception of signals (for example, processors, modulators, multiplexers, demodulators, demultiplexes, antennas and so on), as should be recognized experts in this field of technology. The base station 102 may be a fixed station and/or mobile station. Wireless terminal 104 can be, for example, a cellular telephone, smartphone, road computer, a handheld communication device, a handheld computing device, a satellite radio, a global positioning system, PDA and/or any other suitable device for communication through the wireless communication system 100. In addition, the wireless terminal 104 may be stationary or mobile.

Wireless terminal 104 can communicate with the base station 102 (and/or another base which station(s)) on the channel downlink and/or uplink communication at any given moment. Downward communication line is referred to as the line of communication from the base station 102 to the wireless terminal 104, and a channel of upward communication line is referred to as the communication line from the wireless terminal 104 to the base station 102. Base station 102 can additionally communicate with another base station(s) and/or any good devices (for example, servers) (not shown)that can perform functions such as, for example, authentication and authorization of wireless terminal 104, accounting, billing, etc.

Base station 102 can additionally include a controller 106 power and the verifier 108 of the wireless terminal. The controller 106 power can measure the power level associative associated with the wireless terminal 104 (and/or any other wireless terminals). Additionally, the controller 106 power can pass commands power in a wireless terminal 104 to facilitate the regulation of the power level. For example, the controller 106 power can pass command power in one or more transmitting units are associated with the first subset of transmission units. Team power, for example, can point to increase the power level to reduce the power level to maintain the current power level, etc. When receiving instructions power to increase or smart is to enhance the capacity, wireless terminal 104 can modify the associative power level for a fixed (for example, pre-installed) and/or variable. The preset value may have a variable size based on certain factors (for example, coefficients of reusing frequencies of the channel state in various mobile stations). Additionally, the verifier 108 of the wireless terminal can transmit information as a function of the identifier of the terminal associated with a wireless terminal (for example, wireless terminal 104) in one or more transmitting units are associated with the second subset of transmission units. In addition, one or more identifiers activity can be assigned to each wireless terminal when in an enabled state of the session and included identifiers can be associatively linked to the first subset and the second subset of transmission units. Transmitting the blocks can be in variable formats (for example, time domain, frequency domain, a hybrid time domain and frequency domain).

The controller 106 power can pass commands power channel power control downlink (DLPCCH). In accordance with example resources can be assigned to the wireless terminal 104 through the om base station 102 as as the wireless terminal 104 accesses enabled session state; these resources may include specific segments DLPCCH, one or more identifiers included etc. DLPCCH may be applied through the connecting points of the sector of the base station (for example, using the controller 106 power)to send the message power control downlink to control the transmit power of the wireless terminal 104.

The verifier 108 of the wireless terminal may transmit information associated associated with wireless terminal (for example, wireless terminal 104), which correspond to command power, along with teams of power transmitted by the controller 106 power. For example, the verifier 108 of the wireless terminal can transmit information as a function of the identifier of the terminal (for example, the scrambling mask), associative associated with wireless terminal (for example, wireless terminal 104). The verifier 108 of the wireless terminal may transmit such information by DLPCCH. In accordance with the illustration information, associative associated with the wireless terminal 104 can be passed on DLPCCH in the subset of transmission commands power from the controller 106 power.

Wireless terminal 104 can also switch the TB in the comparator 110, the information verification, which evaluates the received message, associative associated with the wireless terminal 104. The comparator 110 information verification may analyze the received information to determine applies whether the wireless terminal 104 resources as specified by the base station 102; thus, the comparator 110 information verification can assess the information included in the Q-component symbols transmitted DLPCCH. For example, base station 102 may have assigned the identifier(s) (for example, included a session ID to a wireless terminal 104, and a comparator 110 information verification can analyze it, does the wireless terminal 104 to appropriate resources, associative associated with the assigned identifier(s). According to other examples, the comparator 110 information verification may determine that applies whether the wireless terminal 104 segments DLPCCH allocated by the base station 102, and/or restored if the base station 102 resources (for example, included a session ID), previously assigned to the wireless terminal 104.

With reference to Figure 2, illustrated is an exemplary system 200 of the connection (for example, a cellular network), implemented in accordance with various aspects, which contains a number of nodes connected by lines 205, 207, 208, 211, 230, 231, 232, 233, 234, 35, 236, 237, 238 and 239 of communication. The nodes in the exemplary system 200 of communication to exchange information with the use of signals (for example, messaging-based communication protocols (for example, Internet Protocol (IP)). Lines of communication system 200 can be implemented, for example, using wires, fiber optic cables and/or methods of wireless communication. The exemplary system 200 communication includes many leaf nodes 260, 270, 261, 271, 262, 272, to which the system 200 performs communication access across multiple nodes 220, 221 and 222 of the access. Leaf nodes 260, 270, 261, 271, 262, 272 can be, for example, devices or wireless terminals and nodes 220, 221, 222 access may be, for example, routers, wireless access or base stations. The exemplary system 200 also includes a number of other nodes 204, 206, 209, 210, and 212 that are used to provide vzaimosvyazei or to provide specific services or functions. In particular, the exemplary system 200 connection includes a server 204 that is used to support the transfer and persistence related to leaf nodes. The server node 204 may be an AAA server, the server context transfer, the server includes the functionality of the AAA server and the functionality of the server migration context.

The exemplary system 200 depicts a communication network 202, which includes a server 04, node 206 and node 209 home agent, which is connected to an intermediate network node 210 via respective network lines 205, 207 and 208 of the communications respectively. The intermediate network node 210 in the network 202 also provides vzaimosvyazei network nodes that are external from the point of view of the network 202 through a network line 211 connection. Network line 211 connection connected to another intermediate network node 212, which provides additional connectivity to multiple nodes 240, 241, 242 access through network lines 230, 231, 232 communications, respectively.

Each node 240, 240', 240" access is depicted as providing connectivity to the M leaf nodes(260, 270), (261, 271), (262, 272) respectively by means of respective lines(233, 234), (235, 236), (237, 238) due to access, respectively. In the exemplary system 200 of communication, each node 240, 241, 242 access is depicted as using wireless technology (for example, lines of communication for wireless access)to provide access. The coverage area of the communication (for example, cell 250, 251 and 252 of communication) each node 240, 241, 242 access respectively illustrated as a circle surrounding a corresponding access node. In one aspect, the leaf nodes can use the lines (239) communication access for neighbouring poslujivshih access nodes. The data ascending and descending lines of communication could the t transmitted between an end node and a number of neighboring access nodes.

The exemplary system 200 relations are presented as the basis for describing various aspects set forth herein. Additionally, incomparably different network technologies are intended to fall within the scope of the claimed subject matter, the number and type of network nodes, the number and type of access nodes, the number and type of end nodes, the number and type of servers and other agents, the number and type of lines and vzaimosvyazei between nodes may differ from the above in the exemplary system 200 connection shown in figure 2. Additionally, functional objects depicted in the exemplary system 200 connection can be omitted or combined. The location or placement of functional objects in the network may vary.

Figure 3 illustrates the aspect of the environment with many hundred. Honeycomb 350 is a leaf node 360 and the destination node 370 in its field. Honeycomb 351 is a leaf node 361 and the destination node 371 in their field. Honeycomb 350 is shown as having neighboring cells 351, 352 and 354. Honeycomb 351 shown as having neighboring cells 350, 352 and 353. Honeycomb 353 is not adjacent to cell 350.

Each cell has a base station, which mainly manages end nodes in its cell. In each station, the scheduler 120 of the base station has the flexibility to select the variable bandwidth and PSD for the target nodes in its area. End node 360 may be permitted to operate with a higher PSD than the end node 370. Variability is required to increase the capacity of cells and to provide greater bandwidth and higher PSD to end nodes closer to the center of the cell (for example, 360). If the destination node 370 must transmit at a higher PSD, it is exposed to the risk of interference for the target node 371, which is in the adjacent cell 351.

Figure 4 illustrates the aspect mistovich interference. End node 471 is stationary and is located near the border of the serving cell 451. End node 461, also in sauté 451, working in an independent capacity and/or bandwidth in comparison with the end node 471. There are two end-node in a neighboring cell 450. In sauté 450 leaf node 470 is moved through an urban canyon 480 with increased PSD (for example, PSD higher than for the target node 460). End node 470 leaves the canyon on the way 490, turning in the direction of the destination node 471. The sudden exit conditions of the urban canyon and the proximity to the destination node 471 causes a sharp increase in interference to the leaf nodes 470 and 471 and the resulting large change of the loss function in the transmission path. It should be noted that the function of the losses in the transmission path is not tied exclusively to the serving cell, but also is a function of the losses in the transmission path is from the destination node in the neighboring serving cells. In this example, losses in the transmission path with the neighboring hundredth 452 have no impact. Also note that the destination node 471 is no change in its PSD or commands from its serving cell 451. Traditionally, the base station 440 unaware of their interference, called for an end node 471. Aspect enables control with open-circuited quickly reduce megamovie interference and navigate to the management of closed loop at the proper time.

Figure 5 illustrates a logical block diagram of the sequence of operations of the method of regulation. At step 502, the set received SNR (Rxed) of the target signal. This target signal is given by the loss function in the transmission path from the destination node to the serving node and the target node to the nodes in neighboring cells. The destination node can be represented as an element 700, 7. Management 504 with open-circuited originally used by the access node, as may be presented on Fig, item 800. Capacity management with open-circuited widely used in traditional wireless systems. The principle of the open loop is to compensate for some loss in the transmission path serving cell to a certain target SNR can be maintained in the long term. However, the Autonomous approach open to the contour does not take into account megamovie interference. Meanwhile, he also suffers from measurement errors. The load indicator is an effective way to manage megamovie interference, however, in some critical scenarios, such as in an urban canyon, where the destination node can completely change the angle and suddenly release his power in another sauté, traditional command load may not be able to manage interference down to its target level fast enough. PSD transmission destination node is based algorithm with open-circuited so as to assign a quick update on the basis of losses in the transmission path DL. The algorithm with open-circuited can set different received SNR (Rxed) of the target signal for different end nodes. Algorithm with a disconnected circuit controls the level of interference to some extent in the sense that the received SNR (Rxed) of the target signal is a function of the losses in the transmission path to the serving cell and neighbouring service satam. The aspect of novelty include indications of loss in the transmission path from poslujivshih hundred called megatower PC. 6 illustrates a logical block diagram of the sequence of operations of the method of regulation. From the point of view of the destination node, the regulation starts when the user equipment (UE) is enabled at step 602. At step 602 is set SNR accept the th (Rxed) of the target signal. This target signal is given by the loss function in the transmission path from the destination node to the serving node and the target node to the nodes in neighboring cells. The entrance to the cycle may also occur 604, when the destination node is experiencing a radical change its losses in the transmission path (for example, when bombarded with noise from the other end of the block, suddenly emerging from the urban canyon, as shown in Figure 4).

Management 606 with open-circuited, originally used by the access node, as may be presented on Fig, item 800. Capacity management with open-circuited widely used in traditional wireless systems. The principle of the open loop is to compensate for some loss in the transmission path serving cell to a certain target SNR can be maintained in the long term. However, the Autonomous approach with open-circuited does not take into account megamovie interference. Meanwhile, he also suffers from measurement errors. The load indicator is an effective way to manage megamovie interference, however, in some critical scenarios, such as in an urban canyon, where the destination node can completely change the angle and suddenly release his power in another sauté, traditional komandierski may not be able to manage interference down to its target level fast enough. PSD transmission destination node is based algorithm with open-circuited so as to assign a quick update on the basis of losses in the transmission path DL. The algorithm with open-circuited can set different received SNR (Rxed) of the target signal for different end nodes.

Because the algorithm with a disconnected circuit does not have a strict control of noise introduced into other neighboring cells, after an initial pass is made through the control with open-circuited, and the received SNR (Rxed) of the target signal is selected, the control circuit destination node is changed to control 608 closed loop. These levels can be stored in respective storage devices, for example, in element 710 7 and the element 810 on Fig. The destination node can be represented by element 700 figure 7, then updates its PSD transmission by listening to indicators load from the serving cell and at least one other neighboring posluzhivshij cell, which generates the highest noise level. The way the destination node receives other indicators, load cells, may be variable (for example, the destination node may receive through the internode or direct listening hundred other).

With a high-level perspective, the proposed control algorithm SD closed loop includes such action, each honeycomb periodically transmits in broadcast mode, the load indicator in the ascending line (busy or not) for downlink, as may be specified by elements 824 and 834 on Fig, and each destination node decodes the bits of the load indicator, as may be specified by element 712 7 from at least one dominant interfering cell (based on the measurement of losses in the transmission path), and end node, respectively, reduces, maintains or increases its resolved spectral density TX-power based on the serving cell and poslujivshih neighboring hundred through exemplary device, such as an element 748 7. When the command load is sent through the exchange of data between enhanced nodes In transit connection serving cell regulates TX PSD in the UE based on the received commands load from neighboring cells. Regulation may relate to the categories of commands dispatch, or it can be performed by sending a service hundredth commands load in UE. UE monitors its function 610 losses in the transmission path. Control closed loop lasts as long as the loss function in the transmission path remains within the threshold 612. If the function of the losses in the transmission path extends from the threshold target is the range 604, the control method returns to management 606 with open-circuited.

The Protocol closed loop includes a reference PSD, which is stored in the serving cell (node) and is used to control vnutrisajtovoj power. This reference PSD is based on a periodic known signal, such as CQI. End node periodically reports the Delta PSD and supported bandwidth. Delta reference PSD is a function of the load indication from the non-serving cells, and it indicates the power reserve available in the destination node, provided that the appointed (provided) bandwidth for data transmission is equal to the bandwidth CQI. Supported bandwidth is calculated from the maximum transmit power and the TX PSD and specifies the maximum bandwidth that can be supported by the destination node with the maximum limit TX-power, and PSD in which the destination node transmits data. The service node then provides the purpose uplink communication, consisting of bandwidth (for example, the number of tones), which should be lower than the supported bandwidth, and packet format (for example, packet size and modulation). The destination node transmits a packet in accordance with the purpose of the Delta PSD. Management mistaway capacity of the imp is controlled partly by listening to the end node commands load indication from the strongest interfering cell. In one aspect, the load indicators can be formed by comparing the filtered Yod with the target operating point and transmitted once every 10 MS using the KLO. The step size increases/decreases to regulate the displacement PSD, can be variable.

Note that the PSD regulation, the appropriate commands in the load power control closed loop may not be as radical as the proper regulation with open-circuited. Because the load indicators indicate the level of interference, celebrated by other sites, can be achieved by strict control of interference. Therefore, the proposed approach can be obtained fast and simple control of interference.

Test results indicate that without mictowave PC initial setting PSD extremely important for overall performance. This initial setting PSD typically is set by the access node without full knowledge about the variability of a number of factors. These factors vary for each leaf node and include factors outside of the control of the end node.

7 illustrates an exemplary end node 700 (for example, mobile node, the wireless terminal), associative associated with various aspects. Exemplary end node 700 may be a device that can be and is used as any of the end nodes 260, 270, 261, 271, 262, 272, shown in figure 2. As shown, the end node 700 includes a processor 704, the interface 730 wireless interface 740 user input/output and storage device 710, connected together through a bus 706. Accordingly, the various components of the end node 700 can exchange information, signals and data via the bus 706. Components 704, 706, 710, 730, 740 end node 700 can be accommodated in the housing 702.

Interface 730 wireless communication provides a mechanism by which the internal components of the end node 700 can send and receive signals to/from external devices and network nodes (for example, access nodes). Interface 730 wireless communication includes, for example, the module 732 receiver with a corresponding receiving antenna 736 and module 734 transmitter with a corresponding transmitting antenna 738 used to connect the end node 700 to other network nodes (for example, through wireless channels).

Exemplary end node 700 also includes a device 742 user input (for example, a keyboard) and the device 744 user output (e.g. display), which are connected to the bus 706 through an interface 740 user input/output. Thus, the device 742 user input and device 744 uses the research output can exchange information, signals and data with other components of the end node 700 through an interface 740 user I/o and bus 706. Interface 740 user input/output and associative associated devices (for example, the device 742 user input device 744 user output) provide a mechanism by which the user can interact with the end node 700 to perform various tasks. In particular, the device 742 user input and device 744 user output provide functionality that allows the user to control leaf node 700 and applications (for example, modules, programs, procedures, functions, etc)that are enforced in the storage device 710 end node 700.

The processor 704 may be under control of various modules (for example, procedures)included in the memory device 710, and may control the operation of the end node 700 to perform various the transmission signals and the processing described in this document. The modules included in the storage device 710, enforced at startup or at least call by other modules. Modules can share data, information and signals when enforced. The modules also may jointly use the th data and information when enforced. The memory device 710 end node 700 may include a module 712 send a service signal/control and data 714 office of the signals/control.

Module 712 send a service signal/control processing associated with the reception and sending of signals (for example, messages) to regulate the storage, retrieval and processing of information status. Data 714 office of the signals/control include status information, such as, for example, parameters, status and/or other information relating to the operation of the destination node. In particular, data 714 office of the signals/control may include configuration information 716 (for example, identification information of the destination node) and the operating information 718 (for example, information about the current processing state, the status of pending requests and so on). Module 712 send a service signal/control may access and/or modify data 714 office of the signals/control (for example, to update the configuration information 716 and/or operating information 718).

The memory device 710 end node 700 may also include a module 746 comparator module 748 power correction and/or module 750 error handling. Although not illustrated, it should be taken into account is the module 746 comparator, module 748 power correction and/or module 750 error handling can store and/or retrieve data associated associated with it, which can be stored in a storage device 710. Module 746 comparator may evaluate the received message, associative associated with the end node 700, and to compare them with the expected information.

Fig provides an illustration of an exemplary node 800 access, implemented in accordance with various aspects described in this document. An exemplary node 800 may be used as any of the nodes 240, 241, 242 access, shown in figure 2. The node 800 access includes a processor 804, a storage device 810, a network/internetwork interface interface 820 and 830 wireless, connected together through a bus 806. Accordingly, the various components of the node 800 access can exchange information, signals and data via the bus 806. Components 804, 806, 810, 820, 830 node 800 access can be accommodated in the housing 802.

Network/internetwork interface 820 provides a mechanism by which the internal components of a node 800 can access to send and receive signals to/from external devices and network nodes. Network/internetwork interface 820 includes a module 822 and receiver module 824 transmitter used for the connection the s node 800 access to other network nodes (for example, through copper wires or fiber optic lines). The interface 830 wireless also provides a mechanism by which the internal components of a node 800 can access to send and receive signals to/from external devices and network nodes (for example, leaf nodes). The interface 830 wireless communication includes, for example, the module 832 receiver with a corresponding receiving antenna 836 and module 834 transmitter with a corresponding transmitting antenna 838. The interface 830 wireless communication may be used to connect node 800 access to other network nodes (for example, through wireless channels).

The processor 804 may be under control of various modules (for example, procedures)included in the memory device 810, and may control the operation of the end node 800 to perform various the transmission signals and the processing described in this document. The modules included in the storage device 810 may be implemented at the start or at least call through other modules that may be present in the storage device 810. Modules can share data, information and signals when enforced. Modules can share data and information, when enforced. As an example, Zap moneysee device 810 node 800 may include a module 812 state management module 814 send a service signal/control. According to each of these modules mass storage device 810 also includes data 813 state management and data 815 utility signals/control.

Module 812 state management manages the processing of signals received from the leaf nodes or other network nodes related to the storage and retrieval of state. Data 813 state management include, for example, associated with the destination node information, such as a state or part of a state, or the location of the current status of the leaf node, if saved in any other network node. Module 812 state management can access and/or modify data 813 state management.

Module 814 send a service signal/control signal processing to/from the leaf nodes on the interface 830 wireless communication and to/from other network nodes over a network/internetwork interface 820, as required for other operations, such as wireless base function, network management, etc. Data 815 utility signals/control include, for example, associated with the end node data relating to the appointment of the wireless channel for the main work, and other network-related data such as the address of the server support/administration, configuration information for basic network configurations. M is Dul 814 send a service signal/control may access and/or modify data 815 utility signals/control.

Storage device 810 may further include a module 840 assign it a unique identifier, the module 842 assignments included identity module 844 controller power and/or module 846 verification of wireless terminal (WT). You should take into account that the module 840 assign it a unique identifier, the module 842 assignments included identity module 844 controller power, and/or module 846 verification WT may store and/or retrieve associative associated data stored in the storage device 810. Additionally, the module 840 assign it a unique identifier may allocate the identifier of the terminal (for example, the scrambling mask to a wireless terminal. Module 842 assignments included identifier may appoint included the ID of the wireless terminal in the time when the wireless terminal is in an on state of the session. Module 844 controller power may transmit control information power in a wireless terminal or other access nodes. Module 846 verification WT can provide, including associated with the wireless terminal information transmitting unit.

Figure 9 illustrates a system 900 in accordance with an aspect. Component 902 sets the accept (Rxed) of the target signal which is a function what their losses in the transmission path from the destination node to the service node, and from the destination node to the nodes in neighboring cells. The destination node can be so presented as an element 700, 7. Control open circuit 504 is primarily used by the access node, as may be presented on Fig, item 800. PSD transmission destination node is based algorithm with open-circuited, to assign a quick update on the basis of losses in the transmission path DL. The algorithm with open-circuited can set different received SNR (Rxed) target signals for different end nodes. In due time control with closed loop replaces control with open-circuited. Component 904 applies control with open-circuited, and the component 906 is changed to control closed loop.

Below is the aspect that displays the results of experimentation with the management mistaway power. Management mistaway power is by listening through UE commands load indication from the strongest interfering cell. The pressure indicators are formed by comparing the filtered Yod with the target operating point and is transmitted once every 10 MS using the KLO. The step size increases/decreases to regulate the displacement PSD, is 0.05 dB at scenarios D1, D2 and D4 and is - 0.5 dB PR is D3. In tables 1 and 2 show the overall performance according to the average worker, the Yod, the average throughput cell and 5%bandwidth boundary UE with and without control mistaway power. Graphics fairness for different budgets connection lines are shown at 11 and 17 respectively. Fairness is depicted as a CDF of the spectral efficiency of the UE. The initial displacement PSD at open circuit for controlling mistaway power is shown in Figure 10. The results in tables 1 and 2 are at the same initial configuration of the PSD, as given in Figure 10. With the given initial configuration, as figure 10, a larger step size (0.5 dB) required to operate the system properly. A greater change resulting from a larger step size makes the overall performance is slightly worse in comparison with precise adjustment. You should take into account that without control mistaway capacity initial setting may not give any significant results due to a larger ISD and higher penetration loss inherent to the terms and conditions of the budget D3 line, and therefore the table has 2 records, "No data".

Table 1
System throughput management mistaway capacity
The link budgetThe distance between nodes (m)Speed(km/h)The average IoT (dB)Spectral efficiency (b/s/Hz)5%spectral efficiency (b/s/Hz)
D150034,430,690,017
D250030to 4.410,710,017
D3173234,400,570,004
D410003of 4.440,680,017

Table 2
The system throughput without control mistaway power - the same initial setting PSD
The link budgetDistance is between nodes (m) Speed (km/h)The average Yod (dB)Spectral efficiency (b/s/Hz)5%spectral efficiency (b/s/Hz)
D150032,940,810,002
D2500303,010,820,002
D317323No dataNo dataNo data
D4100032,970,810,002

These results demonstrate that for the same initial configuration, the system can be controlled very strictly when the target Yod with reasonable fairness when there is a management mistaway power; and when there is no control mistaway power, the fairness criterion may not be satisfied even though the system carrying capacity is the installed capacity above. As mentioned above, this is due to a significant penalty imposed on the boundary UE with some initial settings. With active management mistaway capacity initial setting PSD is less prone to losses arising as a result of this, since it adaptively updated by the load indicator. When there is no control mistaway capacity, initial setting PSD can have a strong impact on the overall performance. This can be shown in more detail by examining the test results with modified initial settings PSD in tables 3 and 4.

Table 3
The system throughput without control mistaway capacity - modified initial setting PSD I
The link budgetThe distance between nodes (m)Speed(km/h)The average Yod (dB)Spectral efficiency (b/s/Hz)5%spectral efficiency (b/s/Hz)
D150035,760,75 0,017
D2500305,970,810,017
D3173233,480,510,005
D410003of 5.680,750,017

Table 4
The system throughput without control mistaway capacity - modified initial setting PSD II
The link budgetThe distance between nodes (m)Speed(km/h)The average Yod (dB)Spectral efficiency (b/s/Hz)5%spectral efficiency (b/s/Hz)
D150034,530,770,004
D2 500304,470,820,004
D3173233,950,560,005
D4100034,460,780,004

The results in table 3 with D1, D2 and D4 are provided with an initial conversion set on Fig, whereas D3 is given conversion on Fig. The corresponding plots of the fairness provided on Fig-23. Demonstrated a new set of results, which can satisfy the criterion of fairness, however, the smallest letter of the system is higher than the target working point of 4.5 dB.

The results in table 4 with D1, D2 and D4 are other initial conversion, set on Fig, whereas D3 are converting to Fig. Fig-29 show various curves fairness for initial configuration of the PSD II according to table 4. The resulting Jot for these conditions is approximately 4.5 dB, the fairness criterion is satisfied, and the throughput is higher. However, with D1/D2/D4 spectral boundary the efficiency is much lower. Note that the results with D3 in table 4 is slightly better than the results with management mistaway power, are shown in table 1. When there is a management mistaway capacity, the smallest letter in cell is controlled by strict enough; although there is a greater change in the smallest letter in the absence of management mistaway power. Without control mistaway capacity of different cells can have different power interference depending on the layout of the UE. This can be demonstrated on Fig-33, which shows the CDF of the smallest letter for sites with and without control mistaway capacity.

The influence of management mistaway capacity can be assessed through activation and deactivation of the load indicators from neighboring cells, as summarized in table 5.

Table 5
Management effects PSD Throughput compared to performance on the border of the cell
The link budgetThe distance between nodes (m)Speed (km/h)Control of PSD with closed circuitCPE-dnee IoT (dB)Spectral efficiency (b/s/Hz)5%spectral efficiency (b/s/Hz)
D15003No4,530,770,004
Yes4,430,690,017

In another aspect of short-term Yod can be estimated with and without control mistaway power. On Fig CDF provided a short Jot when there is and when there is no control mistaway power. Short Yod is defined as the smallest letter, averaged more than 1.5 MS. It can be noted that without control mistaway power output Jot the time limits stated above.

When implemented in software described in this document, the techniques may be implemented with modules (e.g., procedures, functions, and so on)that perform the operations described in this document functions. Software codes may be stored in a storage device and executed by processors. The storage device can be implemented within the processor or external to the processor, and in the second case, it can be functionally connected to the processor via various means known in the art.

What is described above, which incorporates both the examples of one or more embodiments. Of course, it is impossible to describe every probable combination of components or methodologies for purposes of describing the above embodiments, but experts in the art may recognize that many further combinations and permutations of the various embodiments valid. Therefore, the described embodiments of intend to cover all such transformations, modifications and variations that fall within the nature and scope of the attached claims. Moreover, to the extent that the term "includes" is used in either the detailed description or in the claims, this term has the intention to be including in a manner analogous to the term "comprising"as "comprising" is interpreted when used as a transitional word in a claim.

1. The method is intended for control of megamovie interference in OFDM system, comprising stages, which are:
use accept (Rxed) of the target signal, which includes indications of loss in the transmission path from the destination node to the serving node and the destination node to the neighboring poslujivshih nodes;
use management PSD (power spectral density) with open-circuited at the beginning of the end node or when a significant change function is tion losses in the transmission path of the destination node and
switch to control PSD closed loop at the proper time.

2. The method according to claim 1, in which the control PSD open circuit applies the command load indication from poslujivshih neighboring cells.

3. The method according to claim 1, in which the control PSD with closed circuit applies the command load indication from poslujivshih neighboring cells.

4. The method according to claim 1, in which each cell periodically transmits in broadcast mode, the load indicator upward communication downward communication line or each cell sends commands load in their neighboring cells through a transit connection.

5. The method according to claim 1, containing the decoded bits of the load indicator-based measurement of losses in the transmission path from at least one dominant interfering cell or listening to commands load sent from the serving cell, which may belong to the category of message dispatching or go down explicitly.

6. The method according to claim 5, containing instructing a user equipment (UE) to reduce the power spectral density (PSD) of the transfer.

7. The method according to claim 1, containing maintaining the reference PSD to at least one node and the reference PSD to control vnutrisajtovoj capacity.

8. The method according to claim 1, containing the reception value of the Delta PSD and data to support the so called bandwidth from the UE.

9. The method according to claim 7, in which at least one node provides the purpose uplink communication containing information on bandwidth and packet format.

10. The method according to claim 1, containing the assignment of bandwidth for the UE based on the following equation:

and each assigned to the UE specifies its PSD transmission isand transmits data at the power level specified as follows:


the reference PSD is defined as follows:

UE periodically reports:

when this Tx PSD is defined as follows:

and Li is the load indicator UE i.

11. Machine-readable medium having stored thereon Mashinostroenie instructions for performing the following steps:
use accept (Rxed) of the target signal, which includes indications of loss in the transmission path from the destination node to the serving node and the destination node to the neighboring poslujivshih nodes;
using management PSD with open-circuited at the beginning of the end node or when a significant change of the loss function in the transmission path of the destination node and
switching to driven the e PSD closed loop at the proper time.

12. Machine-readable medium according to claim 11, having stored thereon Mashinostroenie instructions for periodic transmission in broadcast mode through each cell of the load indicator upward communication downward communication line or send through each cell commands load in their neighboring cells through a transit connection.

13. Machine-readable medium according to claim 11, having stored thereon Mashinostroenie instructions for decoding bits of the load indicator from at least one dominant interfering cell or serving cell based on the measurement of losses in the transmission path.

14. Machine-readable medium according to claim 11, having stored thereon Mashinostroenie instructions for instructing a user equipment (UE) to reduce the power spectral density (PSD) of the transfer.

15. Machine-readable medium according to claim 11, having stored thereon Mashinostroenie instructions for maintaining the reference PSD to at least one node and the reference PSD to control vnutrisajtovoj capacity.

16. Machine-readable medium according to claim 11, having stored thereon Mashinostroenie instructions for receiving values of the Delta PSD and data supported bandwidth from the UE.

17. Machine-readable medium according to claim 11, having stored thereon machine is spanaemia instructions for instructing, at least one node to provide the purpose uplink communication containing information on bandwidth and packet format.

18. Machine-readable medium according to claim 11, having stored thereon Mashinostroenie instructions for assigning bandwidth UE based on the following equation:

and each assigned to the UE specifies its PSD transmission isand transmits data at the power level specified as follows:


the reference PSD is defined as follows:

UE periodically reports:

when this Tx PSD is defined as follows:

and Li is the load indicator UE i.

19. The processor is designed to control megamovie interference in OFDM system by running mashinoispytatel code, stored on the media storage data, to:
use accept (Rxed) of the target signal, which includes indications of loss in the transmission path from the destination node to the serving node and the destination node to the neighboring poslujivshih nodes;
to use the control PSD with open-circuited at the beginning of the end node or when significant is " a change in the function of the losses in the transmission path of the destination node and
switch to control PSD closed loop at the proper time.

20. The processor according to claim 19, performing Mashinostroenie instructions for periodic transmission in broadcast mode through each cell of the load indicator upward communication downward communication line or send through each cell commands load in their neighboring cells through a transit connection.

21. The processor according to claim 19, performing Mashinostroenie instructions for decoding bits of the load indicator-based measurement of losses in the transmission path from at least one dominant interfering cell or serving cell.

22. The processor according to claim 19, performing Mashinostroenie instructions for instructing a user equipment (UE) to reduce the power spectral density (PSD) of the transfer.

23. The processor according to claim 19, performing Mashinostroenie instructions for storing the reference PSD to at least one node and the reference PSD to control vnutrisajtovoj capacity.

24. The processor according to claim 19, performing Mashinostroenie instructions for receiving values of the Delta PSD and data supported bandwidth from the UE.

25. The processor according to claim 19, performing Mashinostroenie instructions for instructing at least one node to provide the purpose of ascending the mouse to turn communication contains: information about the bandwidth and the packet format.

26. The processor according to claim 19, performing Mashinostroenie instructions for assigning bandwidth UE, on the basis of the following equation:

and each assigned to the UE specifies its PSD transmission isand transmits data at the power level specified as follows:


the reference PSD is defined as follows:

UE periodically reports:

when this Tx PSD is defined as follows:

and Li is the load indicator UE i.

27. The system is designed to control megamovie interference in OFDM system, comprising:
use accept (Rxed) of the target signal, which includes indications of loss in the transmission path from the destination node to the serving node and the destination node to the neighboring poslujivshih nodes;
a tool for management use PSD with open-circuited at the beginning of the end node or when a significant change of the loss function in the transmission path of the destination node and
means for switching on the control PSD closed loop at the proper time.

28. The system is as in item 27, containing means for instructing each cell periodically broadcast mode, the load indicator upward communication downward communication line or a means to send through each cell commands load in their neighboring cells through a transit connection.

29. The system according to item 27, containing means for decoding bits of the load indicator-based measurement of losses in the transmission path from at least one dominant interfering cell or serving cell.

30. The system according to item 27, containing means for instructing the user equipment to reduce power spectral density (PSD) of the transfer.

31. The system according to item 27, containing means for maintaining the reference PSD to at least one node and the reference PSD to control vnutrisajtovoj capacity.

32. The system according to item 27, containing means for receiving values of the Delta PSD and data supported bandwidth from the UE.

33. The system according to item 27, containing means for instructing at least one node to provide the purpose uplink communication containing information on bandwidth and packet format.

34. The system according to item 27, containing means for assigning bandwidth for the UE based on the following equation:

and is each assigned to the UE specifies its PSD transmission is and transmits data at the power level specified as follows:


the reference PSD is defined as follows:

UE periodically reports:

when this Tx PSD is defined as follows:

and Li is the load indicator UE i.



 

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EFFECT: improved support for multiaddress transfer of data.

21 cl, 10 dwg

FIELD: radio engineering; construction of radio communication, radio navigation, and control systems using broadband signals.

SUBSTANCE: proposed device depends for its operation on comparison of read-out signal with two thresholds, probability of exceeding these thresholds being enhanced during search interval with the result that search is continued. This broadband signal search device has linear part 1, matched filter 2, clock generator 19, channel selection control unit 13, inverter 12, fourth adder 15, two detectors 8, 17, two threshold comparison units 9, 18, NOT gates 16, as well as AND gate 14. Matched filter has pre-filter 3, delay line 4, n attenuators, n phase shifters, and three adders 7, 10, 11.

EFFECT: enhanced noise immunity under structural noise impact.

1 cl, 3 dwg

FIELD: radio engineering for radio communications and radar systems.

SUBSTANCE: proposed automatically tunable band filter has series-connected limiting amplifier 1, tunable band filter 2 in the form of first series-tuned circuit with capacitor whose value varies depending on voltage applied to control input, first buffer amplifier 3, parametric correcting unit 4 in the form of second series-tuned circuit incorporating variable capacitor, second buffer amplifier 5, first differential unit 6, first amplitude detector 7, first integrating device 9, and subtraction unit 9. Inverting input of subtraction unit 9 is connected to reference-voltage generator 10 and output, to control input of variable capacitors 2 and 4. Automatically tunable band filter also has series-connected second amplitude detector 11, second integrating unit 12, and threshold unit 13. Synchronous operation of this filter during reception and processing of finite-length radio pulses is ensured by synchronizer 14 whose output is connected to units 10, 8, and 12. This automatically tunable band filter also has second differential unit whose input is connected to output of buffer amplifier 3 and output, to second control input of variable capacitor of band filter 2.

EFFECT: enhanced noise immunity due to maintaining device characteristics within wide frequency range.

1 cl, 1 dwg

FIELD: radio communications engineering; mobile ground- and satellite-based communication systems.

SUBSTANCE: proposed modulator that incorporates provision for operation in single-channel mode with selected frequency modulation index m = 0.5 or m = 1.5, or in dual-channel mode at minimal frequency shift and without open-phase fault has phase-shifting voltage analyzer 1, continuous periodic signal train and clock train shaping unit 2, control voltage shaping unit 3 for switch unit 3, switch unit 3, switch unit 4, two amplitude-phase modulators 5, 6, phase shifter 7, carrier oscillator 8, and adder 9.

EFFECT: enlarged functional capabilities.

1 cl, 15 dwg

FIELD: electronic engineering.

SUBSTANCE: device has data processing circuit, transmitter, commutation unit, endec, receiver, computation unit, and control unit.

EFFECT: high reliability in transmitting data via radio channel.

4 dwg

FIELD: electronic engineering.

SUBSTANCE: method involves building unipolar pulses on each current modulating continuous information signal reading of or on each pulse or some continuous pulse sequence of modulating continuous information code group. The number of pulses, their duration, amplitude and time relations are selected from permissible approximation error of given spectral value and formed sequence parameters are modulated.

EFFECT: reduced inetrsymbol interference; high data transmission speed.

16 cl, 8 dwg

FIELD: communication system transceivers.

SUBSTANCE: transceiver 80 has digital circuit 86 for converting modulating signals into intermediate-frequency ones. Signal source 114 transmits first periodic reference signal 112 at first frequency. Direct digital synthesizer 84 receives second periodic signal 102 at second frequency from first periodic reference signal. Converter circuit affording frequency increase in digital form functions to convert and raise frequency of modulating signals into intermediate-frequency digital signals using second periodic signal 102. Digital-to-analog converter 82 converts intermediate-frequency digital signals into intermediate-frequency analog signals using first periodic reference signal 112.

EFFECT: reduced power requirement at low noise characteristics.

45 cl, 3 dwg

FIELD: radio engineering; portable composite phase-keyed signal receivers.

SUBSTANCE: proposed receiver has multiplier 4, band filter 6, demodulator 8, weighting coefficient unit 5, adding unit 7, analyzing and control unit 10, synchronizing unit 3, n pseudorandom sequence generators 21 through 2n, decoder 1, and switch unit 9. Receiver also has narrow-band noise suppression unit made in the form of transversal filter. Novelty is that this unit is transferred to correlator reference signal channel, reference signal being stationary periodic signal acting in absence of noise and having unmodulated harmonic components that can be rejected by filters of simpler design than those used for rejecting frequency band of input signal and noise mixture. Group of synchronized pseudorandom sequence generators used instead of delay line does not need in-service tuning.

EFFECT: facilitated realization of narrow-band noise suppression unit; simplified design of rejection filters.

1 cl, 8 dwg

FIELD: mobile radio communication systems.

SUBSTANCE: proposed method and device are intended to control transmission power levels for plurality of various data streams transferred from at least one base station to mobile one in mobile radio communication system. First and second data streams are transmitted from base station and received by mobile station. Power-control instruction stream is generated in mobile station in compliance with first or second data stream received. Power control signal is shaped in mobile station from first power control instruction stream and transferred to base station. Received power control instruction stream is produced from power control signal received by base station; power transmission levels of first and second data streams coming from base station are controlled in compliance with power control instruction stream received. In this way control is effected of transmission power levels of first data stream transferred from each base station out of first active set to mobile station and of transmission power levels of second data stream which is transferred from each base station out of second active set to mobile station.

EFFECT: enlarged functional capabilities.

80 cl, 21 dwg

FIELD: radio engineering.

SUBSTANCE: proposed method and device designed for fast synchronization of signal in wade-band code-division multiple access (WCDMA) system involve use of accumulations of variable-length samples, testing of decoder estimates for reliability, and concurrent decoding of plurality of sync signals in PERCH channel. Receiver accumulates samples required for reliable estimation of time interval synchronization. As long as time interval synchronization estimates have not passed reliability tests, samples are accumulated for frame synchronization estimates. As long as frame synchronization estimates have not passed reliability tests, samples are analyzed to determine channel pilot signal shift.

EFFECT: reduced time for pulling into synchronism.

13 cl, 9 dwg

FIELD: satellite navigation systems and may be used at construction of imitators of signals of satellite navigational system GLONASS and pseudo-satellites.

SUBSTANCE: for this purpose two oscillators of a lettered frequency and of a fixed frequency are used. Mode includes successive fulfillment of the following operations - generation of a stabilized lettered frequency, its multiplication with an oscillator's fixed frequency and filtration of lateral multipliers with means of filters of L1 and L2 ranges and corresponding option of a fixed and a lettered frequencies.

EFFECT: reduces phase noise and ensures synthesizing of lettered frequencies of L1 and L2 ranges of satellite navigational system from one supporting generator at minimum number of analogous super high frequency units.

3 cl, 1 dwg

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