UA97583C2 - Method and system to indicate a desired transmit power and soft power control in a wireless communication system - Google Patents

Abstract

In a wireless communication system, short-term interference mitigation may be used to mitigate (e.g., to avoid or reduce) interference on a given link in order to improve performance of data transmission. The interference mitigation reduces transmit power of interfering transmissions so that a higher signal-to-noise-and-interference ratio (SINR) can be achieved for a desired data transmission. A node may observe high interference from an interfering node that degrades performance of data transmission sent on that link. By taking advantage of an communication path with the interfering node (e.g., wireless data/control channel, backhaul network connection, or analog broadcast signal), the transmitting node can success-folly complete time critical communications while allowing the interfering node to also simultaneously communicate without reducing overall resources nor burdening any managing nodes.

Description

In yet an additional aspect, the computer software is provided for wireless communication.

The computer-readable storage medium contains a first set of codes for instructing the computer to accept from the second node a request to reduce the transmission power for a third-party node that interferes with the transmission carried out by the second node. The second set of codes instructs the computer to reduce the transmit power according to the requested power level.

In yet another additional aspect, a device for wireless communication is provided. Means are provided for receiving from the second node a request to reduce the transmission power for a third party node that interferes with the transmission of the second node. Means are provided to reduce the transmission power according to the requested power level.

In yet an additional aspect, a device for wireless communication is provided. The receiver receives a request from the second node to reduce the transmission power for the third-party node, which interferes with the transmission carried out by the second node. The computing platform reduces the transmission power according to the requested power level.

To implement the above and related problems, one or more aspects contain features that are fully described below and specifically indicated in the claims. The following description and accompanying drawings set forth in detail certain illustrative aspects, but only some of the various ways in which the principles of the aspects may be used. Other advantages and novel features will become apparent from the following detailed description taken in conjunction with the drawings, and the disclosed aspects are intended to include all such aspects and their equivalents.

Brief description of the drawings

The features, nature and advantages of the present disclosure will become more apparent from the detailed description set forth below, when considered in conjunction with the drawings, in which like reference points are appropriately identified throughout the text, and in which:

Fig. 1 depicts a block diagram of a wireless communication system with a transmitting node that wirelessly transmits in the presence of an interfering node.

Fig. 2 depicts a block diagram of a multiple access wireless communication system that includes a plurality of base stations and a plurality of terminals.

Fig. 3 depicts a wireless network consisting of access nodes, relay nodes and access terminals.

Fig. 4 depicts a block diagram of the functionality of a wireless node.

Fig. 5 depicts a block diagram of the sequence of operations of a technique or sequence of operations for indicating a desired level of interference using information included in a message sent to an interference source node.

Fig. b depicts a block diagram of the sequence of operations of a technique or sequence of operations for reducing interference by specifying the desired transmission power for an interfering node using analog coding.

Fig. 7 depicts a block diagram of the sequence of operations of a technique or sequence of operations provided for encoding a reduced power level for an interfering node into a message along with other information.

Fig. 8 depicts a block diagram of a technique's sequence of operations, or sequence of operations, that addresses one-sided evaluation errors in the execution of resource usage messages (UORs).

Fig. 9 depicts a block diagram of a node having a computing platform for implementing a method for requesting reduced interference power.

Fig. 10 illustrates a block diagram of a system having a logical grouping of electrical components to perform interference suppression.

Detailed description

In one particular exemplary use in a heterogeneous network, a terminal may communicate with a serving base station on a forward and/or reverse link. On a direct line of communication, the terminal can track high interference from the base station's interference. This may be the case, for example, if the serving base station covers a picocell or femtocell and has a much lower transmission power than the interfering base station. On the reverse link, the serving base station can track high interference from the interfering terminal. Interference on each link can degrade the performance of data transmissions sent over that link. Jamming can also direct the jamming transmission away from a station tracking high jamming.

In an aspect, short-term interference suppression may be used to suppress (eg, avoid or reduce) interference on a given link to improve data transmission performance. Jamming reduces the transmission power of interfering transmissions so that a higher SNR can be achieved for the desired data transmission.

A wireless communication system may include a number of base stations and other network entities. A base station may be a stationary station that communicates with terminals and may also be referred to as an access point, Node B, advanced Node B, etc. Each base station can provide a radio communication zone for a specific geographical area. The term "cell" may refer to the coverage area of a base station and/or the subsystem of a base station serving this coverage area, depending on the context in which the term is used. A base station can provide a radio communication zone for a macrocell, a picocell, a femtocell, and/or other types of cells. A macrocell can cover a relatively large geographical area (for example, several kilometers in radius) and can support communication for all terminals with a service subscription in the system. A picocell can cover a relatively small geographical area and can support communication for all terminals through a service subscription. A femtocell can cover a relatively small geographic area (eg, a residential area) and can support communication for a number of terminals communicating with the femtocell (eg, terminals owned by residents of a house). Terminals supported by a femtocell can belong to a closed group of subscribers (C52). The technologies described here can be used for all cell types.

Terminals can be distributed throughout the system, and each terminal can be fixed or mobile. A terminal may also be referred to as an access terminal, mobile station, user equipment,

subscriber installation, station, etc. The terminal can be a cellular telephone, a personal digital assistant (PDA), a wireless modem, a wireless communication device, a pocket device, a compact portable computer, a radio telephone, a local wireless communication (LM) station, etc. The terminal can communicate with a serving base station and can cause interference to and/or receive interference from one or more interfering base stations. A serving base station is a base station designed to service a terminal on a forward and/or reverse link. An interfering base station is a base station that causes direct link interference to the terminal.

An interfering terminal is a terminal that causes interference to the base station on the reverse link.

The term "exemplary" is used in this application to mean "serving as a sample, example, or illustration." Any embodiment described in this application as "exemplary" should not necessarily be construed as best or superior to other embodiments. The disclosed embodiments may be applied to any one or combinations of the following technologies: Code Division Multiple Access (CDMA), Multi-Carrier CDMA (MO-CDMA), Broadband CDMA (MU-CDMA), High-Speed Packet Access (BDMA) . The wireless communication system can be designed to implement one or more standards, such as 15-95, sata2o00, I5-856, MU-SOMA, TO-5SOMA and other standards.

The detailed description set forth below in connection with the accompanying drawings is intended as a description of various configurations of the invention and is not intended to represent only the configurations in which the invention may be practiced. The detailed description includes specific details in order to provide a complete understanding of the invention. However, it will be apparent to those skilled in the art that the invention can be practiced without these specific details. In some cases, known structures and components are shown in block diagram form to avoid obscuring the concepts of the invention.

Referring now to the drawings, in FIG. 1, a wireless communication system 100 facilitates a transmitting node (or Node A as used herein) 102 to successfully transmit a time-critical packet data link, as depicted at 103, to a receiving Node (or Node B as used herein) 104 by asking the interfering node(s) (or Node C as used herein) 106, 108, 110 to lower its transmission power. If a lower power level can allow both the transmitting Node 102 and the interfering Node 106, 108, 110 to continue, then radio resources are conserved and the time-critical communication is completed successfully. In one aspect, a node may decide not to transmit if its power falls below a predetermined minimum level.

In an illustrative example, the wireless communication system 100 is heterogeneous, in which different classes (ie, different levels of maximum transmission power) of nodes (eg, femtocell, macrocell, relay terminal, picocell, access terminal, base station, access point, etc.) are in close proximity to each other (i.e., may interfere with each other) One Node 104, depicted as an access point, serves a transmitting Node 102, depicted as an access terminal (AT) or user equipment (UE), and is thus in close proximity wireless communication as depicted by position 111, which allows the exchange of messages about the use of resources (VOM) through the radio channel 112 of control or data transmission. In contrast, the interfering Node 108 may be a high-power node for which the transmitting Node 102 has insufficient power to wirelessly make the connection, and thus is forced to use the PTO link via the trunk connection 114 over the backbone network 116. As an additional example, the interfering Node 110 may include a femtocell that is closer to both the transmitting Node 102 and the receiving Node 104 (eg, the user's own femtocell) than they are to each other. However, the transmitting Node 102 is authorized to communicate wirelessly with the interfering Node 110 in the sense that it does not have the proper security authentication keys. Therefore, the transmitting Node 102 can preferably perform

PTO request via broadband transmission 118, which in an illustrative implementation to simplify interpretation of the PTO request may contain an analog signal corresponding to the desired interference power. In an exemplary aspect, this information may include a squared "A" factor divided by the desired B2/Irezineo interference power, where "A" may be constant or selectively varied to appropriately correct for different classes of interfering nodes. Additionally, sufficient data regarding transmission path losses, etc., may exist such that the desired interference power can be further addressed to these transmission path losses, as well as calibration errors due to mismatches between uplink and downlink transmission path losses. yakuza

In another aspect, each respective interfering Node 106, 108, 110 may have a distinct interference power rating of IU, I, and I, respectively. to the power level that each node would use, but to subdue a reduction request, according to this disclosure.

This difference may refer to the transmission power at the respective Node 106, 108, 110 predicted or detected by the received power at the receiving Node 104, or the received power at the transmitting Node 102. The transmitting Node 102 may request the desired power Interference, respectively, which is a constant value chosen to be typically or in the worst case satisfactory.The requested level may reflect predicted or experimentally determined transmission path losses between the transmitting Node 102 and the interfering Node 106, 108, 110, or losses in the transmission path between the receiving Node 104 and the interfering Node 106, 108, 110.

Transmission Node 102 preferably includes a quantization component 120 for reduced bandwidth requirements to transmit a desired level of interference, value "B", or specified loss "c" in the transmission path.

The desired level of interference on the frequency channel component 122 preferably determines which channels are those related to the source of interference or to the desired transmission when performing a proper request. The adaptive component 124 of desired interference preferably can change the desired level of interference, taking into account factors such as relative losses in the transmission path between transmitting and interfering Nodes

102, 106, 108, 110, between the interfering and receiving Nodes 106, 108, 110, 104, or between the transmitting and receiving Nodes 102, 104. The adaptive component 124 of desired interference can use combined measurements across multiple nodes when checking losses in transmission paths. The channel calibration component 126 can preferably correct for the discrepancy in the subjective losses in the forward link and reverse link transmission path between the transmitting Node 102 and the interfering Node 106, 108, 110 caused by the losses of the electronic components in the receiving and transmission chains.

Also, it should be borne in mind that the transmitting node (Node A) 102 in some cases detects interference without identifying the source of the interference. Node 102 can send a general request to reduce the power level without special knowledge about the recipient and compliance with the interfering node. Alternatively or additionally, Node 102 may prospectively announce a desired maximum interference power before actually sensing an interfering transmission. Alternatively or additionally, an eavesdropping node 140 that has not yet performed an interfering transmission may eavesdrop on Node A's request 102 and comply.

It should be further understood that Node A 102 can sense interference power originating from multiple interfering nodes. Node 102 may perform targeted or general broadcast request(s) such that the combined interference power is below a desired level, or is likely expected to be below a desired level. Practically, the serving Node (not shown) may indicate to nodes such as user equipment (UE) either its overall target interference level (either explicitly or indirectly through speed assignment) or its target interference level per node. In the latter case, the SHE can display the target obstacles on the node. As a result, the SHE can send a Resource Utilization Message (RUM) with control of the Rx-somtwa transmission power set accordingly to achieve the target level of interference in a defined probability value. Nodes that accept this AOM can adhere to it according to the provisioned rule. In the case of a general broadcast request, the serving node may attempt to manage the macro, overall level of interference with the PTO, without being aware of or warned about the interference caused by any particular interference source.

IS.

In another aspect, Node 102 may be unable or unwilling to measure interference, preferring instead to broadcast its desired interference power. Alternatively or additionally, Node A 102 may have indirect interference indication based on retransmission requests from Node

B 104 or based on the frequency of errors in the data sensed by Node A 102 on the signals it is currently receiving. Alternatively or additionally, the interference may be irregular such that Node A 102 does not currently measure the interfering signal, but is motivated to reduce the probability that it will occur at a critical time that would prevent a successful transmission.

Based on the foregoing and as further described below, the transmission Node 102 provides one or more, as well as other advantages, of: (1) indication of the quantized value of the transmission path loss constant "(1"); (2) superposition of VIM with different values of the desired of the level of interference to different parts of the bandwidth (for example, channels), which preferably reaches the indication "C" in an implicit form, when the value of the request (Pth-somtvo:) of the transmission power depends on the time-frequency resources used for signaling the node creating the interference; and (3) calibration, such as for a serving cell, by calibrating to the average of neighboring cells that can perform fine-tuning operations. Thus, indicating the desired interference information is communicated to the interfering nodes, which can collectively agree to reduce power if appropriate. decentralizing network optimization and peering with "soft" interference response (ie, not just plug-in response aspiration). In some implementations, the provision of an analog mechanism for indicating Isezivie6 that uses channel reciprocity can expand the set of interfering devices that can interact to reduce the effects of interference.

Fig. 2 is an illustration of a multiple access wireless communication system 200 in accordance with various aspects. In one example, the multiple access wireless communication system 200 includes a plurality of base stations 210 and a plurality of terminals 220. Additionally, one or more base stations 210 may communicate with one or more terminals 220. Each of the stations 210 and the terminals 220 , which are close to each other, may be one of the interfering nodes, such as represented by position 223, transmitting Node 224 and receiving Node 225 as discussed above. As a non-limiting example, base station 210 may be an access point, Node B, and/or other appropriate network entity. Each base station 210 provides a radio communication area for a specific geographic area 202a-c. As used in this application and generally in the prior art, the term "cell" may refer to the base station 210 and/or its coverage area 202a-c depending on the context in which the term is used.

In order to increase the throughput of the system, the coverage area 202a, 20260, or 202c corresponding to the base station 210 may be partitioned into a plurality of smaller areas (eg, areas 204a, 204p, and 204c). Each of the smaller zones 204a, 204p, and 204c may be served by a corresponding base transceiver subsystem (BT5, not shown). As used herein and generally in the art, the term "sector" may refer to VT5 and/or its coverage area depending on the context in which the term is used. In one example, the sectors 204a, 204p, 204c in the cell 202a, 2020, 202c may be formed by groups of antennas (not shown) at the base station 210, where each group of antennas is responsible for communication with the terminals 220 in the part of the cell 202a, 2020, or 202 p. For example, base station 210 serving cell 202a may have a first array of antennas corresponding to sector 204a, a second array of antennas corresponding to sector 204p, and a third array of antennas corresponding to sector 204c. However, it should be understood that the various aspects disclosed herein may be used in a system having sectorized and/or non-sectorized cells. In addition, it should be understood that all relevant wireless networks having any number of sectorized and/or non-sectorized cells are intended to be within the scope of the claims appended to this document. For simplicity, the term "base station" as used herein may refer to both a station serving a sector and a station serving a cell. It should be understood that as used herein, a downlink sector in a non-intersecting link scenario is a neighboring sector. Although, for simplicity, the following description generally refers to a system in which each terminal communicates with a single serving access point, it should be understood that the terminals may communicate with any number of serving access points.

According to one aspect, the terminals 220 may be distributed throughout the system 200. Each terminal 220 may be stationary or mobile. As a non-limiting example, the terminal 220 may be an access terminal (AT), a mobile station, a user equipment, a subscriber point, and/or another appropriate system entity. The terminal 220 may be a wireless device, a cellular telephone, a personal digital assistant (PDA), a wireless modem, a portable device, or other suitable device.

Moreover, the terminal 220 can communicate with any number of base stations 210 or with no single base station 210 at any given time.

In another example, the system 200 may employ a centralized architecture using a system controller 230 that may be connected to one or more base stations 210 and provide coordination and control for the base stations 210. According to alternative aspects, the system controller 230 may be a single network entity or set of network entities. Additionally, system 200 may use a distributed architecture to allow base stations 210 to communicate with each other as needed. Backbone communication 235 can facilitate direct communication between base stations using such a distributed architecture. In one example, system controller 230 may further include one or more connections to multiple networks. These networks may include the Internet, other packet data networks, and/or voice circuit-switched networks that may provide information to and/or from terminals 220 in communication with one or more base stations. 210 in system 200. In another example, system controller 230 may include or be coupled to a scheduler (not shown) that may schedule transmissions to and/or from terminals 220.

Alternatively, the scheduler may reside in each individual cell 202, each sector 204, or a combination thereof.

In an example, system 200 may use one or more multiple access schemes, such as SOMA,

TOMA, ROMA, OROMA, EOMA with a single carrier (50-EOMA), and/or other suitable multiple access schemes.

TOMA uses time multiplexing (TOM) in which transmissions for different terminals 220 are orthogonalized by transmitting in different time slots. EOMA uses frequency multiplexing (FMM), in which transmissions for different terminals 220 are orthogonalized by transmission on different subcarriers. In one example, TOMA and EOMA may also use code multiplexing (COM), in which transmissions for multiple terminals may be orthogonalized using different orthogonalized codes (eg, a Walsh code), even if they are sent in the same time slot or on the same and the same subcarrier BOMA uses orthogonal frequency multiplexing (FOM), and BS-EOMA uses frequency multiplexing with a single carrier (5C-EOM).

OBROM and 50-ROM can divide the system bandwidth into multiple orthogonalized subcarriers (for example, tones, bins, ..), each of which can be modulated by data. As a rule, the modulation symbols are sent in the frequency domain with OEBOM and in the time domain with 50-ECM. Additionally and/or alternatively, the system bandwidth may be divided into one or more carriers, each of which may contain one or more subcarriers. System 200 may also use a combination of multiple access schemes, such as

OBAMA and SOMA. Although the power management techniques provided herein are generally described for BOTH systems, it should be understood that the techniques described herein may be similarly applied to any wireless communication system.

In another example, base stations 210 and terminals 220 in system 200 may transmit data using one or more data channels and signal using one or more control channels.

Data channels used by system 200 can be assigned to active terminals 220 so that each data channel is used by only one terminal at any given time. Alternatively, the data channels may be assigned to a plurality of terminals 220, which may be superimposed or orthogonal to the data channel. In order to save system resources, the control channels used by the system 200 can also be divided among the plurality of terminals 220 using, for example, code multiplexing. In one example, data channels orthogonally multiplexed only in frequency and time (eg, data channels are not multiplexed by

COM), may be less prone to orthogonality loss due to channel states and receiver imperfections than the corresponding control channels.

In Fig. 3 shows a wireless network 300 with several wireless communication nodes, designated generally as Wireless Communication Nodes 302 and Access Terminals 304. A wireless node can receive, transmit, or both. In the discussion that follows, the term "receiving node" may be used to refer to a wireless communication node that performs reception, and the term "transmitting node" may be used to refer to a wireless communication node that performs transmission. These designations do not mean that the wireless communication node is incapable of performing the functions of reception and transmission.

A wireless communication node can function as an access point (AP) or sector, relay point, access terminal, or any combination thereof. In the example wireless network 300 shown in FIG. With, the group

Nodes 302 wireless communication functions together to provide trunk services to a number of terminals 304 access. The group includes a wireless communication node 302A that functions as an access point by providing a trunk connection to the network 330 (eg, U/L/L/AM such as cellular network, UL AM, IBR, Internet, etc. ). This wireless communication node 302a, however, can function as a relay point for other access points not shown in FIG. With, or provide a relay function in response to dynamic reconfiguration of the wireless network 300. The group also includes two Nodes 302B1 and

Z02r2 of wireless communication, which function as relay points to connect the access terminals 304 with the access point 302a. Although not shown, these wireless communications 302B01 and 302R2 may also provide connectivity to other access points and relay points. The same Nodes 302B1 and 302p2 of wireless communication can function as access points for other groups of wireless communication nodes in the network 300.

In Fig. C shows four access terminals 304. In this example, two access terminals 3021 and 3022 are connected to the access point 302a through the relay point 302Bb1 and one access point 304z3z is connected to the access point 302A through the relay point 302r2, and the remaining access point 3044 is directly connected to the point access 302a. The access terminal 304 may be any mobile user device capable of maintaining radio communication with the wireless Node 302, including, by way of example,

mobile or cellular phone, personal digital assistant (PDAs), portable laptop computer, digital audio recording device (such as an MP3 player), game console, digital camera, or other voice, information, audio, video, messaging device, or multimedia. In some applications, the access terminal 304 may also function as an access point and/or relay point for other wireless communication nodes in the network 300.

The radio interface specification used or adopted to support the wireless network 300 may be based on any suitable multiple access technology that allows mobile subscribers to share available radio resources. Examples of such multiple access technologies include time division multiple access (TDMA), frequency division multiple access (FDMA),

SOMA, Wideband SOMA (M/-SOMA), Orthogonal Frequency Division Multiple Access (FDMA), or some combination thereof.

Fig. 4 is a block diagram illustrating an example of the functionality of the Wireless Node 400.

The following description is informative and roughly defines the functionality of each block. Only functionality relevant to the various concepts described throughout this disclosure will be described.

Those skilled in the art will appreciate that these functional blocks may provide other functionality not described herein. In this example, the wireless communication node 400 includes two functional units: a wireless network adapter 402 and an environment access controller 404.

A wireless communication node can be an access point or a sector. In a wireless communication node that serves as an access point, the network adapter 402 maintains a wireless downlink connection with the first node to allow the environment access controller 404 to communicate with the second node.

The first node may be a relay node and the second node an access terminal, however, other downlink configurations may be supported. The network adapter 402 in the access point also supports a wired trunk connection 405 to the network.

A wireless communication node can be an access terminal. In a wireless communication node that serves as an access terminal, the network adapter 402 maintains a wireless uplink connection with the first node to allow the environment access controller 404 to communicate with the second node.

The user interface 403 is used to control the content transmitted with the second node.

The first node may be a relay point and the second node an access point, however, other uplink configurations may be supported.

The functionality of the wireless communication node described above applicable to the access point and the access terminal can be implemented in the relay point. In this configuration, the network adapter 402 can be used to maintain either an uplink or downlink connection with the first node to allow the environment access controller 404 to communicate with the second node. As an example, the network adapter 402 may maintain an uplink connection with another relay point to allow the environment access controller 404 to communicate with the access point. Alternatively, or in addition to this, the network adapter 402 may maintain a downlink connection to another relay point to allow the access controller 404 to communicate with the access terminal. As will be appreciated by those skilled in the art, a different uplink and downlink configuration may be supported by the network adapter 402.

The network adapter 402 provides both a receiver function and a transmitter function. The function of the receiver includes demodulation of the radio signal and restoration of the content carried by the signal. The function of the transmitter includes modulation of the subcarrier with content. The wireless network 402 provides various functions such as radio frequency (RF) preprocessing, analog-to-digital conversion (AAC), time and frequency estimation, channel estimation, turbo coding, and the like. In the essence of the invention, the wireless network adapter 402 provides full implementation of the physical level of the Node 102 of wireless communication.

A medium access controller (MAC) 404 is used to control access to the wireless medium. It uses a scheduling algorithm to accommodate the current functionality of the wireless node (eg access points, relay points, access terminals). The environment access controller 404 determines the scheduling of communication between other wireless communication nodes using the request/grant scheme discussed earlier.

The media access controller 404 may be configured to support a wireless downlink supported by the network adapter 402. In this configuration, the media access controller 404 receives a transmission request from a first node that includes a given radio resource allocation. The specified radio resources received in the transmission request from the first node may include frequency assignments, code allocation assignments, and other types of radio resources. The specified radio resources may come from the assignment of radio resources previously sent by the environment access controller 404 to the first node. In response to this request, the environment access controller 404 assigns at least a portion of the specified radio resources. Alternatively or additionally, the environment access controller 404 may assign additional radio resources not specified by the first node. The assignment may be based on a variety of parameters, including, for example, quality of service and/or loading requirements. Assigned radio resources are transferred to the first node in the grant message.

Media access controller 404 may also be configured to support an uplink wireless connection supported by network adapter 402. In this configuration, media access controller 404 sends a communication request to the first node using a given radio allocation -resources. The specified radio resources received in the transmission request from the first node may include frequency assignments, code allocation assignments, and other types of radio resources. In response to the request, the environment access controller 404 receives from the first node permission to communicate, using at least part of the specified allocation of radio resources.

In one aspect depicted in FIG. 5, technique 500 indicates a desired interference level with information included in a message sent to the interference source node(s). When an interfering node is detected (block 502), it is determined what its rated interference power is (block 504). When there is an urgent need to transmit time-critical data to a receiving node that is currently experiencing interference from an interfering node, in one aspect, the transmitting node can determine one of a plurality of communication methods that can reach the interfering node (block 506).

Alternatively, a general approach may be used to reach the interfering nodes (block 508). The selected communication method conveys a message to the interfering node, rather to lower, rather than reduce, its power level to avoid excessive interference (block 510). This message can be sent over the air using a data link or a dedicated control link (block 512). In addition, as an alternative, the message may be sent to the node(s) of the interference source over the trunk connection (block 514), if such a connection is available. As an additional alternative, the message may be an analog broadcast broadcast to an interfering node that is not in wireless or network communication with the transmitting node (block 516).

Depending on the analytical or empirical resources available to the transmitting node, the value sent by the message to the interfering node may be specified relative to the transmitting node, the interfering node, or the receiving node (block 518). The message may include, for example, a transmission power recommendation that the interfering source node may use (block 520). Alternatively, the message may include a desired interference level (block 522). In one aspect, the interference source may then determine an appropriate transmit power based on the desired interference and an estimate of the transmission path loss for the requesting node (block 524). In the above messages, information about desired interference or desired transmit power may be quantized appropriately to collect bits, as indicated in block 526. In block 528, the interfering node's request for reduced transmit power may specify a portion of the bandwidth that is applicable for the reduction power In block 530, the interfering node's request for reduced transmission power may specify a time window or duration that is applicable to the power reduction.

In another aspect depicted in FIG. 600, a technique 600 is provided for reducing interference by specifying a desired transmit power to an interfering node using analog coding. If

Node A experiences excessive interference from Node C (and possibly other nodes) that exceeds the desired interference level Iorevineo (block 602), then Node A decides, for example, to experience the level of interference Ioecineo instead. In this aspect, IrevIveEeO (block 604). This desired interference level can be a one-way value (block 606).

Alternatively, this IrezIVeo interference level can be determined analytically based on data or assumptions (eg, spaced locations, channel quality reports, scheduled data rates, etc.) regarding the transmission path losses between Node A and Node B, between Node C and Node A, and between Node

C and Node B. Thus, Node A determines that the level of Irezivyjeus interference can be overcome by the power

Transmitting node A (block 608). Alternatively, this IsezIveo threshold can be determined experimentally for the levels at which Node B (the receiving node) is capable of receiving a transmission from Node A with an acceptable error rate (EER) (block 610). As an additional alternative, this information may also be included in signaling from the receiving node (block 612).

In an illustrative aspect, Node A (transmitting node) transmits a control message with power R

Sopgoi-V2Loeviveo transfer to Node C (block 614). So Node A wants to sense Iorevigneo interference (In units of power, eg milliwatts) and A is a number (also in units of power). In block 616, provided that a is the loss in the transmission path between Node A and Node C, then Node C (the interfering node) receives this control message at a power of Rx sopgoi-C1A2/IoezIVeo. Assume that A is known to Node C (block 618). This may be the case if A is a system-wide constant, for example (block 620). In one aspect, information about B may be included in the control message (block 622). The information may be quantized accordingly, for example (block 624). This can be used when distinguishing between different power classes of transmitters (such as femtocell and macrocell) (block 626). In another aspect, information about A may be sent to Node C over a trunk connection (block 628) or over the air via another control or data channel (block 630). Node C may then prefer to transmit at power P'x

IchTEVEEVEN-- В2/Р вх somtvoi - 2 В2LoevivE0) -IoevIVEO/OI (block 632). Alternatively, as depicted in block 634, Node C may prefer not to transmit if it believes that the Rich IchtTeveienEn is not sufficient to support transmission to its receiver with the desired spectral efficiency. In another additional aspect, the Node C may also decide to ignore the message regardless of whether its transmissions are affected (block 636). If a decision is made to respond, the transmission from Node C is received at Node A at Crt hichtEVEEVEV-YOEBIVEO (BLOCK 638). In one aspect, channel reciprocity is assumed, ie, the channel gain on the control line and the data line is equal to Ci (block 640). Thus, it should be understood in light of the benefit of this disclosure that technique 600 ensures that Node A receives its desired interference from Node C.

In Fig. 7, in one aspect, a method 700 is provided for encoding a reduced power level for an interfering node (eg, Ioeziveo) along with additional information. The aforementioned control message may be a unicast signal (block 702) or, alternatively, a broadcast signal (block 704). In the latter case, multiple nodes in the network can determine their transmission powers based on the level at which they receive the control message and the value of A, which can be digitally encoded within the message (block 706). In some aspects, there may not be any need to accurately identify the sender of the message (block 708). In other aspects, random unique sender identifier data may be included in the message to help receivers (partially) identify the sender and determine their response (block 710). Control messages may include other information such as sender priority, peer access metrics, etc. (block 712). Control messages can be sent uplink (to prevent downlink interference) (block 714) or downlink (to prevent uplink interference) (block 716).

In the above system, it is assumed that the losses in the transmission path on both communication lines are the same.

This may not always be the case due to calibration errors, signal level adjustments differing on communication lines, etc. Thus, in one aspect, the required Irezivieo of the control message may result in interference with OO Irezivieu, where Irezivieu is a value that depends on channel mismatch, calibration error, etc. A "calibration mechanism" can be introduced to determine O and correct it either in the transmission power of the control message or in the response of the interfering source. For this purpose, on

Fig. 8, the technique 800 addresses errors of unilateral evaluation during execution of messages (AOM) of resource usage. Consider forward link PTO (E-PTO) (block 802), although a similar application can be used for reverse link PTO. In an ideal scenario, the sending access point (AP).

VIM at Reg/oeziveo, receives Ioeziveo interference from the access terminal (AT) responding to the VIM. As a result of calibration errors, the AR accepts O Irezivieo interference, where the two-way calibration error is O--(Sadr-nx/CAr-tyu) (Sadt-thx/Sat-vx) (block 804). Sdr-yah is the unknown gain applied to the AC of the AP circuit, Sder-th is the unknown gain applied to the TX of the AP circuit, etc., (block 806) Preferably, the AT can calibrate its power to the serving AP to determine O (block 808 ). In particular, in some cases or implementations, the AT can determine the average value of O from different ARs (block 810). With the two-way 0 calibration error determined, the AT applies a constant 0" calibration correction to correct for it (block 812). For the reverse link PTO (B-PTO), the AT may apply 07 to the power PTO (block 814).

For an additional aspect of calibration errors, consider the case where the PTO sender is unknown (block 816), and thus cannot apply a correction factor specific to that AP (block 818). In this case, the mismatch can be described as (Sdr-vx/Sdr-thx)vOm-5EMOIMO-AR)(CaP-VX/SAR-TX)5EUMIMO-AR. (block 820). This calibration mismatch can be reduced by averaging the calibration over multiple APs (block 824).

In Fig. 9, Node 900a determines that it is unable to perform a successful transmission to another Node 90065 and thus may signal an additional Node 900c to request a reduced transmission power level to reduce interference without losing bandwidth to the wireless network 901. In addition, Node 90ba may respond to a request from Nodes 9000, 900c to lower its transmission power in order to enable them to successfully complete transmissions. To do this, Node 900a has a computing platform 902 that provides means such as code sets to instruct the computer to perform interference mitigation. In particular, the computing platform 902 includes a computer-readable storage medium (eg, memory) 904 that stores a plurality of modules 906-914 executed by the processor(s) 920.

Modulator 922, controlled by processor 920, prepares the downlink signal for modulation by transmitter 924 emitted by antenna(s) 926. Receiver 928 receives uplink signals from antenna(s) 926, which are demodulated by demodulator 930 and provided to the processor. 920 for decoding. The transmit power component 932 may adjust the transmit power for purposes such as attenuation of interference. The received signal indicator (A5I) 934 measures the strength of the received signal to calibrate the power of interference and losses in the transmission path. In particular, a means (eg, module, code set) 906 is provided to detect interference from the interfering node. A means (eg, module, code set) 908 is provided for signaling a request, which is received by the interfering node, to perform transmission with a power level so as to achieve the desired interference level. A means (eg, a module, a set of codes) 910 is provided to wirelessly transmit communication with data packets to a receiving node. A means (eg, a module, a set of codes) 912 is provided for receiving a request to reduce the transmission power that prevents the transmission of another node.

A means (eg, module, code set) 914 is provided to reduce the transmission power according to the requested power level.

With reference to fig. 10, a system 1000 that provides interference mitigation is illustrated.

For example, system 1000 may reside at least partially within user equipment (UE).

It should be understood that the system 1000 is represented as including functional units, which may be functional units that represent functions implemented by a computing platform, a processor, software, or a combination thereof (eg, programmable hardware).

System 1000 includes a logical grouping 1002 of electrical components that can act together.

For example, logical grouping 1002 may include an electrical component 1004 for detecting interference from an interfering node. In addition, the logical grouping 1002 may include an electrical component 1006 for signaling a request received by the interfering node to transmit with a power level to achieve the desired interference level. Additionally, the logical grouping 1002 may include an electrical component 1008 for wireless transmission of communication with data packets to the receiving node. The logical grouping 1002 may include an electrical component 1010 for receiving a request to reduce the transmission power, which prevents the transmission of another node. The logical grouping 1002 may include an electrical component 1012 for receiving a request to reduce the transmission power, which prevents the transmission of another node. Additionally, system 1000 may include memory 1014 that stores instructions for performing functions associated with electrical components 1004-1012.

Although electrical components 1004-1012 are shown external to memory 1014, it should be understood that one or more of these components may exist within memory 1014.

While the specification describes specific examples of the present invention, those skilled in the art will be able to derive variations of the present invention without departing from the concept of the present invention. For example, the disclosures of this description refer to circuit-switched network elements, however, they are equally applicable to packet-switched domain network elements.

For example, the exemplary aspects discussed above can be implemented with nodes that can exchange information by acting as a transmitting node in one case and then acting as an interfering node in another case. Additionally, peer availability may be determined relative to the receptivity of a node to favorably respond to a request for reduced transmission power. Alternatively, the node may be provided only to act as a selected one of the transmitting node and the interfering node.

Those skilled in the art will appreciate that information and signals can be presented using any of a variety of different technologies and techniques. For example, the data, instructions, commands, information, signals, bits, symbols, and elementary references that may be referenced throughout the foregoing description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination of these.

Additionally, those skilled in the art will appreciate that the various illustrative logic blocks, modules, circuits, methods, and algorithms described applicable to the examples disclosed herein may be implemented as electronic hardware, software, or a combination of both. For purposes of illustration, this interchangeability of hardware and software, various illustrative components, blocks, modules, circuits, methods and algorithms have been described above generally in the context of their functionality. Whether such functionality is implemented as hardware or software depends on the specific application and design constraints imposed on the entire system. Those skilled in the art will be able to implement the described functionality in a variety of ways for each particular application, but such implementations should not be construed as departing from the scope of the present invention.

The various illustrative logic blocks, modules, and circuits described applicable to the examples disclosed herein may be implemented or implemented with a general purpose processor, a digital signal processing processor (DSP), an application-oriented integrated circuit, a user programmable gate array (PGA), or other a programmable logic device logic element on discrete components or transistor logic circuits, discrete hardware components, or any combination thereof, designed to perform the functions described herein. The general-purpose processor may be a microprocessor, but alternatively, the processor may be any conventional processor, controller, microcontroller, or state machine. The processor may also be implemented as a combination of computing devices, for example, a combination of O5P and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with an O5P core, or any other such configuration.

The methods or algorithms described applicable to the examples disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. The software module may reside in VAM memory, flash memory, VOM memory, ERWOM memory, EERVOM memory, registers, hard disk, removable disk, SO-VOM, or any other form of storage medium , known in the prior art.

The data storage medium can be attached to the processor in such a way that the processor can read information from and write information to the data storage medium. Alternatively, the storage medium may be an integral part of the processor. The processor and data storage media can be located on the ABIS.

In one or more exemplary aspects, the functions described may be implemented in hardware, software, programmable hardware, or any combination thereof. If implemented in software, the functions may be stored on or transmitted as one or more instructions or codes on a computer-readable medium. Computer-readable media include both computer storage media and communication media, including any media that facilitates the transfer of a computer program from one location to another. Data storage media can be any available media that can be accessed using a computer. By way of example and not limitation, such computer-readable media may include VAM, PTO, EERVOM, CO-PTO or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. In addition, any connection is essentially called a computer-readable medium. For example, if the software is transmitted from a website, server, or other remote source using coaxial cable, fiber optic cable, twisted pair, digital subscriber line (051), or wireless communication technologies such as infrared radiation, radio communication communication and microwaves, then coaxial cable, fiber-optic cable, twisted pair, PERSONS. or wireless communication technologies such as infrared radiation, radio communication, and microwaves are included in the definition of medium. The terms "audio" and "audio" as used in this application include compact disc (CD), laser disc, optical disc, digital universal disc (UD), floppy disc, and Vish-gau disc, where the discs are usually reproduced data magnetically, while discs usually reproduce data optically using lasers. Combinations of the above should also be included within the scope of computer-readable media.

The foregoing description of the disclosed examples is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these examples will be readily apparent to those skilled in the art, and the basic principles defined herein may be applied to other examples without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the examples shown herein, but is to be accorded the broadest scope consistent with the principles and novel features disclosed herein.

Link positions 100, 200 wireless communication system 102 transmitting node 104 receiving node 106, 108, 110 interfering nodes 112 radio control or data channel 114 backbone connection 116 backbone network 118 broadband transmission 120 quantization component 122 frequency channel component 124 adaptive desired interference component 126 calibration component 140 eavesdropping node 202, 204 geographic area 210 base station 220 terminal 224 transmitting node 225 receiving node 230 system controller 235 backbone communication 300 wireless network 302, 400 wireless node 304 access terminal 402 wireless network adapter

403 user interface 404 medium access controller 405 trunk connection 900 node 901 wireless network 902 computing platform 904 storage media (memory) 906-914 modules executed by the processor 920 processor 922 modulator 924 transmitter 926 antenna 928 receiver 930 demodulator 932 transmission power component 934 signal indicator 1000 system that provides the possibility of interference attenuation 1002 logical grouping of electrical components 1004 electrical component for detecting interference 1006 electrical component for signaling a request 1008 electrical component for wireless communication transmission 1010, 1012 electrical component for receiving a request 1014 memory, etc

Pereyazhcha VELMYKHI and "Khi MI Mazstralnomu connected Kosha for with . Ne i ke 3) pn e x Y o Z erelyanya VOM ra ; eat in a pozlrotavim manner and: R and I and with I Z'khivnyi la! and bream Behviorovlmu gelkavinku" Zkyazunii pp. 7 ZK ochtkorkaichey obstacle masylreoetim in

ND ay your BO zedoozhna syak In m Losev 1 a took off; I'm a cat, I'm MN

Unreliable university 1 de tk m Sean iy I - To tk ki and mech

Gzhvnnri channel 100 se 00 Pot Zh no

Arenas: DovenEZ ТЯ same ni chi vych schi vyud Ya

S Kaplyurukatsikh channel 176 R Tom; with ethos

Daily Rokever : : 3 "Spoozukhuvuchio uzaya z" ay : -- y ik 14 x - sh k-i ; Analyogoka ak Y 1 x, in 8 zivrakayovna E. ! : x and. х «VT -х Чий "жк s pereliacha VIM Lvyazkhnyi kt eokany - и z o I "liuk pozidkttsa i i

A B no Kg utkolngkiz Ki pr kuzol pk y v z - 7. pernkntknnto chit, : t that v Every p-k I ldnt

TO t tity shih

Fig. 1 st Oda z z masa in uch SHE a 2045 KOH in 2 o mity daiviya | ; with and , codewaller 230 . of base stations 5 m. GK for. и Й ой " | and 5 ВЯ 20 ос я ян ; where ЧЕ and -20

ЕВ, и | ah! ac

And VH in shoyu and PE! creates and digs 295. ; nyn venu 220 obstacles uz i , shcha zhk vkrikzhya shk Perenava Her" y NE i / y i y lVna KNOT Tirnymalnyi ve pe She yi- 54 uzh iya OK; schi shk She vy

Fig. WITH

(iii 3) Access point; yo (Ari i / KK

Relay point: Access terminal

I R) and ЧА sho m U -y

M s h y s V y y Relay point " see | (VR; 302» p

And | "Give it

ЯМ ос НЯ 304. и ре um: | daytime "essnonyai VSCHEN

STILL live; AT access terminal) no 1: Access terminal (AT)

SAT access terminal

Fig. With pi

Custom. interface (implementation Access controller Network patcher Wire trunk

Her for the shepherd -d nie in 7 J

TWAIN KNOCK o") to the environment 404 |, 405 : (realization of lever points)

Fig. 4

Butterflies of the breath of the desired ruddy bridge of the 500 knot hierenka and

NN skennnntya Utrovyuvtchiy peyeshikomkm in So pan nuzol vylyalevyYy" i SHY

To despise noamEnatma potrikt neretskoya; with l Determine a suitable method) of communication, so that as an alternative, a foreign language is used

And reach the node forming the obstacle 306 | ZYK communication system failure

Raziokanal Ikeruvaniya 7 Matechral syanana; that is used by the Analog Micro-Communication System, the so-called srsk system for sending the desired signal to the formative transmission of the formative data transmission) PR of the communication network. р and 5І poreivkodi uzy and payshikon of node 516

Stagnation of steering power is accepted in relation to the spirit of transmission of the other, which forms the boundary of the receiving BI.

In my mind, I am in a state of foam

To torment the desired level p Alternatively, determine || As an additional algorithm, the transmission power for the desired level of interference is to determine the desired level of the request to the generator for the request to the generator H of the interference with the estimation of the loss of the interference of the node Bai the interference of the node AI of the transmission path 514

Change the power supply for the consumption of the mixture of particles 5!

Fill in the part of the bandwidth applicable to requests 5 Y

Set a time window. applicable to request 5 ang, 5

Methodology of burning gums. interference spiachen vlakvki according to the poem of analog I); pricking that - pluchayann, etc

No Marked excessive She and Gak pi obstacle -

Determine the desired powerful uvula of the perineum

That "Y Ioehnevkh is provided with units of ШЙ | Shchi

One-sided Anacschtnuno defined ' Eupnic two-sided and ZChamkne reverse

Meaning of meaning; subjective determination based on unsuccessful connections, etc., of the reception telospknosis of obstacles to social communication and the narrowness of the university 608! 813

The transmission node transmits a control message from R - N Yinev; you i TESOMTKI I WEBINEO I

They extract a shrill message from the transmission trakaz of the Horn of communication

TO THE KNOWN INTRODUCTORY of node I 018

System Kuvypslane for about Kaantuvatii 624 Nidigrakka and se In cherea razhekanal constant dopomaiesche: about - matstralnymi ikeruvaniya forwarded by kerukachago Different classes of the formation of ice day) where I Obstacles took yaz

A ZOVIcheMmlen V KY MK ZhK ; 520 va and SCHE BV schi IJ

Zoom performs transmission as che Z V pod Vuzon s va Kuneu s kl terelyachu tv mtEneEvEv Z ovvivvo S bios 9 " " BO: turns on or Nuzaa s - : y " " E shnoring

Uzaz A accepts: and - and them

Uch A dr OR'tvimtenvenkv from Moevinko 636

Kanashie exchange allowed 54)

Fig. 6 and Methodology for reducing verenzhel nivkhom vvanka with the help of VNatogov 7 00: and coding What AI and

Single-channel transmission Her Broadcast transmission is not available! PI, 8 cottage 704

And Pzayomidiya mik lecttkoma uzhtvmi to emphasize petuzhnast and persdache on the basis of accepted petuzhnost kerukyuyuga! elevation from NNYACHENIA V. Ok

708 and . Mnikanniya 1 echo at : ! nor |. spades ARIES, i

The control message also includes political information (e.g., the sender's priority, indicators of tone availability) 712

Hispobation of the perentodes of the ascending line of the eye 4.

Fig. 7 and Mstodnye for errors one-sidedly ovinkn in pikomann with and messages of use of pesursv (KM 800 and ! VOM pryogahan: vyazoku PV) | Wow! their ze eggs rpemiykymi Cameroon AB vBVyHas neretzanm Certain non-response of calibration noise;

Oh (Skhvah/Skvlh) (Sltth! Syatah) VO

Sledh is an UNKNOWN DANGER OF THE LATEST, oh panic TOWER is used! AR 506 th

JSC can measure the power of bleaching AR, it is necessary to determine p 808

And the limit is to determine the average of the great Northern AR VIU

І With a defined two-way calibration І, AT applies a constant

And correction kapnbruvayn to make a correction. DI hi "Two VIMs with a feedback loop (6. PTO JSC applies where the power of EOM V and o | i Sender of KUM pepidomny? p Y Yes. o It is impossible to apply the correction coefficient characteristic for this AB with Z

EV

! Congestion of tracts and

GO (Savyakh 7 Sde-tikhivomovnomeAe) / (Savyakh / Sarlkh)zevmnome 820

Vibrational mismatch reduced by calibration regression of ARYAYA sets

Fig. 5 shows a node 900 and a computing platform 902

Storage medium (memory), computer-integrated 904

Tool (module, set of codes) for detecting obstacles 906 -

And Tool (module, a set of codes for sysnalizing the request to train the transmission with the power level so as to reach the desired level:

Nienknu PEDELIKOD 906

Its Zasibsmedul, a set of codes) for the wireless transmission of communication with data packets of the primary node of the National Institute of Health and Human Services.

Means (molule, set of codes) for receiving a request to reduce (transmission power, interfering with frost 912

Tool (module, code set) to reduce transmission power! according to requested power level 4 !

And Processor 950). Converter 994 - Modulator 92 Demodulator 940 4 Receiver 28 g

Node 9066 Node OObs

Fig. 9

Logical grouping 02

Electric component for removing obstacles to them

Glectric component for signaling a turn; WHAT to perform a transfer in the left What ; of negativity so that the achievement of the dream morning "And vkchinvro" NERESHOD LO06

Electrical component for wireless packet communication! data to the receiving node TO08 1 ! Electrical component for receiving a request for reduced GI 1 transmission power, creating interference

Electrical component for reducing the power of the generator according to the requested power level 1

The memory of

Fig. 10