TW201225711A - Estimating access terminal location based on uplink signals - Google Patents

Abstract

A location of an access terminal is estimated based on uplink signals that a plurality of femto cells receive from the access terminal. The transmit power of the access terminal may be adjusted in some cases to facilitate the reception of signals at the femto cells during a location determination operation. In some embodiments, a location of an access terminal is estimated based on relative path loss values derived from the signals received by the femto cells.

Description

201225711 VI. INSTRUCTIONS: PRIORITY CLAIM This patent application claims to file an application on November 29, 2010. The assigned agent number is 1 10372P1, and the commonly-owned U.S. Provisional Patent Application No. 61/417,766 and The rights and priority of the assignee's filed on April 6, 2011, which is assigned to the assignee, is hereby incorporated by reference. BACKGROUND OF THE INVENTION The present invention relates generally to wireless communications, and more particularly, but not exclusively, to determining the location of an access terminal. [Prior Art] A wireless communication network can be used over a defined geographic area to provide various types of services (e.g., voice, data, multimedia services, etc.) to users within the geographic area. In a typical implementation, access points (example 2, each access point supporting one or more macro cell service areas) are distributed across the macro network to provide access terminals (eg, cellular phones) Wireless connection, the access terminals operating within the geographic area served by the network. 'Access terminal related applications can utilize the location of the access terminal. For example, the location of the access terminal can be reported during the 911 call initiated by the access terminal. As another example, an access terminal based navigation system uses the location of the access terminal to provide navigation assistance. 201225711 Various techniques have been used to estimate the location of an access terminal. In some implementations, the access terminal is configured to calculate a location based on signals received from a nearby macrocell service area. In some implementations, the access terminal includes a global "bit system" (GPS) receiver that receives signals from the GPS satellites to determine the current location of the access terminal. In some implementations, the access terminal includes a Wi-Fi transceiver that calculates the location based on signals received from nearby Wi-Fi base stations. These techniques can estimate the position based on an analysis of the received signal strength or the received signal timing. Here are a few examples. Signal strength triangulation and fingerprinting are obtained by obtaining a set of signal strength measurements from a set of transmitters and comparing the set of signal strength measurements (referred to as "fingerprints") with a set from the coverage area. A method of matching the database of measured values of grid points to estimate the location of the access terminal. Advanced forward link triangulation (AFLT) is a location technique that relies on the time difference of arriving from multiple base stations at the access terminal. Observed Time Difference of Arrival (OTDOA) 标准化 A standardized position estimation method for UMTS in which the observed time difference of the pilot frequency between a pair of base station signals at the access terminal is used to calculate the position estimate (as a hyperbolic body) ), and optionally calculate the speed of the access terminal. Uplink arrival time difference (utd〇a), a standardized position estimation method in which the observed time difference is calculated between the access terminal and the pair of position measurement units (LMUs). The observed time difference is calculated by maximizing the correlation of the received signals over time shifted by the LMU. In practice, traditional position estimation techniques such as GP S and position estimation 201225711 based on the location of the rainbow cell service area tower may not be very effective indoors due to poor quality or position of k. Caused by the limited accuracy in the estimate. For example, because the signal from the satellite may be too weak to decode, a satellite-based position estimation system such as GPS may perform poor indoor estimation. Traditional ground-based position estimation techniques used in macrocell environments may also not be able to meet the accuracy requirements of indoor applications. In addition, some traditional location technologies require access terminals to include specific hardware. For example, a GPS-based solution requires an access terminal including a GPS receiver. Similarly, a Wi-Fi based solution requires an access terminal including a Wi-Fi transceiver. Therefore, these techniques cannot be used for conventional access terminals that do not include the necessary hardware. In view of the above, there is a need for improved techniques for estimating the location of an access terminal (e.g., in an indoor environment). SUMMARY OF THE INVENTION The following is a summary of several exemplary aspects of the invention. This summary is provided to facilitate the reader and not to limit the scope of the invention as a whole. For convenience, the terms used herein also refer to a single aspect or aspects of the invention. In some aspects, the invention relates to estimating the location of an access terminal (and thus the location of a user accessing the terminal) based on an uplink signal measured by a set of femtocell service areas. In some aspects, the location of the access terminal can be determined using one or a combination of the following techniques. A set of femtocell service areas can measure the received strength of signals received from the access terminal (e.g., counter 201225711 to (4) pilot frequency signals). A set of femtocell service areas can measure the timing associated with signals received from the access terminal (e.g., time difference of arrival (TDOA) or round trip time (rtt)). "In these methods, a so-called "fingerprint j" based on the current set of measurement information can be obtained (eg, the relative path loss of the access terminal or the relative signal transmission delay measured at each femtocell service area) And matching the plurality of different previously defined fingerprints associated with different locations in a given environment (eg, in the coverage of a set of femtocell service areas) via the current fingerprint with the previously defined fingerprint The information is compared to identify the location most likely to be associated with the current fingerprint. The location is then indicated as the current location corresponding to the access terminal. For example, by signal strength (eg, Ecp) and interference (eg, Nt) In an implementation in which the information yields a value indicative of relative path loss, a given fingerprint (corresponding to a given location) may include a number of relative path loss values, where each value is associated with a unique pair of femtocell service regions (eg, 'Position Μ corresponds to the relative path loss values Χ, Υ, and 相关 associated with 毫-Β, AC, and AD, respectively, with the femtocell service area.) In the implementation of late information, a given fingerprint (corresponding to a given location) may include a number of time delay values, each of which is associated with a different femtocell service area (eg, location Μ corresponds to slave access) The signal propagation time delays X, Y, and Z of the terminal to the femtocell service areas a, Β, and c, respectively. In some cases, the limited heartbeat information is implemented as a database or a prediction model. A database or a prediction model The value can be generated, for example, via a ray tracing model that uses the physical ring 201225711 surrounding the femtocell service area and the building material. Here, each specified location within the physical environment is "visible" at that location. A set of values from the received signal strength (or corresponding relative path loss) or propagation time of all femtocell service areas. Thus, each defined location within the environment is associated with a set of values (e.g., relative path loss or timing values) corresponding to an expected value (or range of values) at that location. The equivalent is then stored in a database associated with the corresponding defined location. In conjunction with the above operations and other operations taught herein, one or more components of the communication system can be configured to support various communication schemes. In some aspects, the communication scheme implemented in accordance with the teachings of the present invention includes receiving, from a plurality of femtocell service regions, signal strength information corresponding to signals from the access terminal measured by the femtocell service areas; Determining a relative path loss value associated with the femtocell service areas based on the received signal strength information; and estimating a location of the access terminal based on the relative path loss values. As another example 'in some aspects, the communicating party t implemented according to the teachings of the present invention includes receiving signal propagation delays corresponding to signals received from the access terminals from the plurality of femtocell service areas from the plurality of femtocell service areas a value; comparing the received signal propagation delay value to a plurality of sets of defined delay values associated with the different locations; and estimating the location of the access terminal based on the comparison. In some embodiments, the transmit power of the access terminal can be adjusted (e.g., increased) to ensure that a sufficient number of femtocell service regions are capable of receiving an uplink signal from the access terminal during the location decision operation. For example, the number of femtocell service areas that can receive signals from the 201225711 access terminal (e.g., pilot frequency signals) can be determined after the start of the signal measurement operation. If the number of femtocell service areas is insufficient to calculate a reliable position estimate, the power control parameters (e. g., 'set points) of the access terminal can be adjusted to cause the access terminal to increase its transmit power. Accordingly, in some aspects, the communication scheme implemented in accordance with the teachings of the present invention includes: determining at least one location of the access terminal to be estimated; and transmitting the "is number based on the result of the decision to adjust the transmit power of the access terminal. [Embodiment] Various aspects of the contents of the present case are described below. It will be apparent that the aspects described herein can be implemented in a variety of forms, and that any particular structure, function, or both disclosed herein are merely illustrative. In accordance with the teachings herein, one of ordinary skill in the art will appreciate that the aspects disclosed herein can be implemented independently of any other aspect, and that two or more aspects of the aspect can be combined in one manner. . For example, the device may be implemented or implemented using any number of aspects described herein. In addition, such a device or implementation may be implemented using other structures, functions, or structures and functions other than one or more of the aspects set forth herein, or structures and functions other than those described herein. This method. Further, the aspect may include at least one element of the request item. Figure 1 illustrates several nodes of an exemplary communication system (e.g., a portion of a communication network). For the purpose of the sentence B ΑΛ ri 1 knife J to say the date of the sun and the moon, the various aspects of the content of the case will be described in the context of one or more access terminals, access points and network entities communicating with each other. However, it should be understood that the teachings of the present disclosure may be applied to other types of devices or other similar devices that make 8 201225711 in other terms: for example: 'In various implementations, an access point may be referred to or implemented as a base port. Node B, Evolution Node B, Femtocell Service Area, Family Festival: Two Family Evolution Nodes, access terminals may be referred to or implemented as: User Equipment (UEs), mobile stations, mobile devices, etc. in System 10G The access point is - or multiple wireless terminals (e.g., access ~ end 102) provide access to - or multiple services (e.g., network connections). Access terminal 102 can be placed in a system. Within the coverage area of the UI, or roaming within the coverage area of the system, the access terminal 102 can be connected to the access point 1〇4, the access point 1〇6, and the access point 1〇 at various points in time. 8. Access point 11〇 or some other access point (not shown) in system 1〇〇. Each of these access points may be associated with one or more self-network entities

(For convenience, denoted as network entity U2) communication to facilitate WAN connectivity. The K network entity 112 can take various forms, such as _ or multiple radio network entities and/or core network entities. Thus, in various implementations, network entity 112 may represent functions such as at least one of the following: network management (eg, via operation, direction, management, and provision of entities), dialing control, communication period management, mobility management, gates Channel features, interactive features, or some other suitable network feature. In some aspects, mobility management involves tracking the current location of the access terminal via the use of a tracking area, location area, routing area, or some other suitable technique; controlling paging for the access terminal; and providing access to the terminal Access control. In addition, two or more network entities can be co-located and/or two or more network entities 201225711 can be distributed across the network. In the implementation of /, the access point 104110 includes a low power access point (e.g., having a transmit power of 25 milliwatts or less). The low power access points are typically arranged to complement a conventional network access point (e.g., a macro access point) by providing a more robust indoor wireless coverage or other coverage for the access terminal. Such low power access points may be referred to as, for example, a femto access point, a femtocell service area, a home Node B, a home evolved Node B, or an access point base station. Typically, such low power access points are connected to the Internet and mobile service provider network via a dsl router or cable modem. For convenience, a low power access point may be referred to as a femtocell service area or a femto access point in the following discussion. The femtocell service area may be arranged in a channel of the same frequency as the macro cell service area (common channel arrangement) or in a different channel not used in the macro cell service area (dedicated channel arrangement when the access terminal is close to the femto cell) When in the vicinity of the service area, it detects the pilot frequency of the femtocell service area and makes a handover from the macro cell service area. The access terminal operating on the same channel as the femto cell service area is guided via the neighbor list The frequency search is used to measure the pilot frequency. For the access terminal only on the macro channel, the transfer is enabled via the beacon letter M; (for example, the pilot frequency beacon). Alternatively, due to weak The macrocell cell service area is piloted or adjacent to the femtocell service area, and the access terminal can autonomously perform intra-frequency scanning. In some aspects, the present disclosure relates to a network using a femtocell service area for access terminal location operations. Road (for example, the chain of the 10 10 201225711 microcell service area controlled by the shared entity + I #, fresh, or cluster). Advantageously, due to each nano The coverage of the microcell service area is relatively small per + h, and the coverage is relatively small. Based on the triangular measurement information (for example, path loss and time &< + + , jin) A can be finer by the foot technique. One of the resolutions is that the summer survey information is received by the femtocell service area from the access terminal. In addition, the use of the femtocell service area can be promoted without modification and does not require any Additional 3G access terminals are located in the case of additional radio technologies (eg, Gpc; seven WU, + _! «·t Lt or Wi-Fi). To this end, one or more entities in Figure 1 include The terminal location estimation function is taken - and the database 114 storing the information about the fingerprint is accessed. The library 114 can be located at the local end (for example, in the network entity ία or in the access point 104) or in the network. In addition, in some cases, the database 114 may be decentralized, whereby the database information may be stored in different entities of the network (eg, 'stored in the network entity 112' And access point 104). The network entity 112 and the access point 104, which are described monthly, optionally include the functions of the access terminal location estimates 116 and 118. It should be understood that ''other entities (e.g., 'other access points and access terminals) may Including the power month b, for example, a network entity, a femtocell service area, an access terminal, or an eight-other entity can control the location estimation operation. Therefore, for location estimation, such an entity can control the femtocell Monitoring of uplink transmissions by the service area. In addition, such entities may obtain uplink measurement information and use the information to estimate the location of the access terminal. In some implementations, the location estimation procedure may be performed by different entities. 201225711 Different steps. For example, an application on the access terminal can initiate a location estimation procedure. A service access point or some other network entity can then control the operation of the access point and access terminal to obtain uplink information. In addition, one or some other entity in the entities may use the information obtained and information obtained from the local or network fingerprint database to estimate the location of the access terminal. Here are a few typical examples. In some implementations, the network entity 112 (e.g., a femto management feed, a femto aggregator, or some other suitable entity) manages the location estimation process. In this case, network entity 112 can send control signals to access point 104-U0 | to control uplink monitoring and reporting of location estimation procedures. In addition, the network entity 112 can send a control signal ' to the access point 1 ( 4 (e.g., the current serving femtocell service dragon of the access terminal 102) to request that a valid dialing be established with the access terminal iQ2 for the location estimation procedure. After the measurement operation is completed, each access point sends a result measurement information to the network entity U2. The network entity ιΐ2 uses the measurement information to estimate the location of the access terminal 1〇2. In some implementations, access point 1G4 (e.g., the current serving femtocell service area of access terminal 1〇2) manages the location estimation procedure. In this case 'access point 1G4 can send control signals to the access point, (iv) to control uplink monitoring and reporting of the location estimation procedure. In some embodiments, the access point 104 sends control signals to the access point (10) via the network entity (1). In some embodiments, access points (e.g., femtocell service areas) directly transmit control signals to each other (e.g., via an interface such as (for the brain) or X2 (for the HeNB). The access point 1〇4 12 201225711 also controls its own uplink monitoring and reporting of the location estimation procedure. In addition, the access point 104 can ensure that a valid dialing is established between the location estimation procedure and the access terminal 102. After the measurement operation is completed, each access point 106-110 transmits the resulting measurement information to the access point via the network entity 112. The access point 104 uses its measured measurement information and the measurement information it receives to estimate the location of the access terminal 102. The access terminal location estimate 116 is shown in accordance with the teachings of the present invention as including a number of components that facilitate the efficient estimation of the location of the access terminal by the base burst signal. For purposes of illustration, access terminal location estimate 116 is shown to include only such components. It should be understood that other entities in the communication system (e.g., 'access terminal location estimate 118') may include this functionality. The position estimate 120 based on relative path loss involves retrieving a value indicative of a relative path loss value associated with the femtocell service area from the uplink signal measured by the femtocell service area and using the value to estimate the value Take the terminal location. Examples of such operations are described in more detail below in conjunction with FIG. 2. The timing based position estimate 122 involves retrieving signal propagation delay values from the uplink signals measured by the femtocell service area and using the values to estimate the access terminal location. Examples of such operations are described in more detail below in conjunction with FIG. Access terminal transmit power control 124 involves adjusting the transmit power of the access terminal' to attempt to control the number of femtocell service areas that can effectively measure the uplink signal from the access terminal. Examples of such operations are described in more detail below in conjunction with FIG. 13 201225711

For convenience, IV can be used to describe the operation of the flowchart of FIG. 24 (or any other discussed or taught herein) by a particular component (eg, in FIG. 1 or FIG. 5, and). operating). However, it should be understood that the operations are performed by other classes, and that the operations can be performed using a different number of components. It should also be understood that one or more of the operations described herein may not be used in a given implementation. Referring first to FIG. 2' in some embodiments, estimating the access termination based on a value indicative of relative path loss derived from the upper lamp link k number of the access terminal, eg, a set of femtocell service areas, each The signal strength of the frequency signal transmitted by the access terminal can be measured. Since the transmit power of the access terminal is unknown and dynamic, it is not possible to estimate the path loss between the terminal and the given femtocell service area from such measurements. However, the difference in measured intensities at the two femtocell service areas is equal to the path loss difference from the current location of the access terminal to the femtocell service areas. Thus the difference in the 'path loss value can be used as a fingerprint to estimate the current location of the access terminal. Use the relative value to decrement the size of the triangulation group by 1. For example, if four femtocell service areas (e. g., A, B, C, and D) are visible, the fingerprint has three values (e.g., corresponding to the femtocell service block groups Ab, AC, and A-D). In short, a location scheme based on relative path loss can involve the following operations. When the location group of the access terminal is to be estimated, the femtocell service area (for example, all femtocell service areas near the serving femtocell service area for the access terminal) is performed for the access terminal (for example, 14 201225711 pilot frequency) The nickname) uplink guess. In one aspect of the disclosure scheme, a specific long code execution measurement in the reference pilot frequency is performed. In the implementation of measuring the pilot frequency signal for position estimation, the reference pilot frequency signal can be shifted in time series for more fine-grained estimation. The femtocell service area capable of sensing the access terminal transmits the measured Ecp/Nt to the requesting entity (eg, a location estimation server or a service femtocell service area implemented in the network entity) The ratio of the frequency strength to the sum of all other signals on the channel, the Nt value. The requesting entity uses this information to calculate the path loss difference for each femtocell service area pair and attempts to find the difference in the database. Matching to predict the location of the access terminal. Various aspects of an exemplary embodiment of a location estimation scheme based on relative path loss will be described in detail below in conjunction with the discussion of the operational block of Figure 2. As shown in block 202, at some At each point in time, the entity in the network decides to estimate at least one location of the access terminal. For example, a client in the access terminal, a serving femtocell service area, a network entity, or some other entity can trigger location estimation. Alternatively, the position estimate can be triggered regularly (eg, periodically). If the client is located in the access terminal towel, then the terminal is accessed. The application layer protocol with the communication of the server is usually exchanged to exchange the information required by or provided by the location estimation program (example mapping information, location estimation). As shown in block 204, it is determined as block 2〇2. The result is at least one 5. X can be sent to the _ group of femtocell service areas, the message requesting the femtocell service area to measure the uplink signal from the access terminal and/or 15 201225711 requesting to the femtocell service area Signal strength information. For example, the message may include an identifier (eg, a long code) associated with the access terminal and a pilot signal for measuring the measured signal from the access terminal for the femtocell service area and reporting the measured signal Request for strength. As another example, in the case where the femtocell service area automatically performs uplink measurements, the message may simply request the femtocell service area to report for the specified access terminal (or alternatively 'all quantities The measured signal strength of the measured access terminal. The message of block 204 can take various forms, for example, a single message requesting the above action. It can be sent to all femtocell service areas. As another example, a dedicated message can be sent to each femtocell service area, whereby the message only seeks to act on a portion of the femtocell service area. The operations of block 204 (and other operations of Figure 2) are performed by various entities. In some embodiments, such operations are performed by a network entity (e.g., a femto management server, etc.). In some embodiments, by One of the femtocell service areas in the picocellular service area (eg, a service femtocell service area for accessing the terminal) performs such operations. In the latter case, the 'nano cell service area is via a network entity or some The other suitable path sends a message to the other femtocell service area. It is still in this case that the 'nano cell service area will perform its own measurements. The uplink measurement is performed when the access terminal is in a valid dialing. If the access terminal is invalid, then a dummy call can be initiated. As indicated by block 206, signal strength information corresponding to the signal measured by the femtocell service area is received from the femtocell service area. As described in the present invention, in some implementations, the information indicates the access terminal pilot strength available to each femtocell service area. Here, in an implementation in which the requesting entity is a network entity, the serving femtocell service area for accessing the terminal will send its measurement information to the network entity. Conversely, in an implementation where the requesting entity is a serving femtocell service area, the serving femtocell service area will maintain its measurement information so that it can be used with information received from other femtocell service areas. As indicated by block 208, a relative path loss value associated with the femtocell service area is determined based on the received signal strength information. Specifically, an indication of the difference in path loss between different pairs of femtocell service areas can be calculated. In some aspects, the amount of difference in the set of differences (e.g., the relative path loss value in this case) depends on the number of femtocell service areas reporting signal strength information. In some embodiments, the decision of the relative path loss value includes determining the difference between the received signal strength values measured by the different femtocell service areas. In this case, the determined relative path loss value may include the determined difference values. That is, the difference in received signal strength of the signal from a given access terminal obtained by the two femtocell service areas corresponds to (ie, indicates) from one of the femtocell service areas to the access terminal The path is the difference between the path loss and the path loss from the other femtocell service area to the access terminal. Therefore, the difference can be referred to as the relative path loss value in this case. As indicated by block 210, the location of the access terminal is estimated based on the relative path loss value. In some embodiments, this involves multiple sets of relative paths that associate the determined relative path 17 201225711 loss value with previously defined, different locations. & Value (eg, fingerprint stored in the database towel) Compare and • (4) Identify the location based on the comparison. For example, the determined relative path loss value can be compared to a plurality of previously defined sets of relative path loss values stored in the database to identify (eg, predict) one or more of the determined relative path loss values. Multiple groups. The location of the access terminal can then be estimated based on the location associated with the identified group. For example, the estimated location can be calculated as the average of the locations associated with the several identified groups. As a specific example, a fingerprint corresponding to the determined relative path loss value is matched with a database containing a plurality of sets of relative path loss values, wherein each set of defined relative path loss values corresponds to a coverage area of the femtocell service area. The only position in the multiple limit positions (points). Based on the values, the most approximate point of the fingerprint with the decision is predicted. For example, the determined relative path loss value can be represented by {PLfl_f2, PLfl_n, PLfl-f4. The set of points that maximize the probabilistic function based on the relative path loss values can then be determined and used to estimate the location of the access terminal. Referring to FIG. 3, in some embodiments, the location of the access terminal is estimated based on a signal propagation delay value, wherein the signal propagation delay value is an uplink signal from an access terminal by a set of nano-cell service areas Measured in the measurement. Here, the serving femtocell service area can estimate the propagation delay from the access terminal by comparing the reverse link frame boundary from the access terminal with its own forward link frame boundary. Other femtocell service areas can then perform similar comparisons. By using a comparison of the timing difference offsets from the serving femtocell 18 201225711 service area and other femtocell service areas, the estimated delay from each end of the access terminal (four) to the femtocell service area can then be calculated. The reference timing difference between the individual femtocell service areas in a synchronization system such as cdma2000 should be very small. The "propagation delay" of the disclosed scheme can consist of a round trip delay time (rtt) between the access terminal and a given femtocell service area. In a scenario, the femtocell service area can send a request 'waiting for a response' to the access terminal and then subtract the desired hold time at the access terminal from the timing (the access terminal gets the request and the call is made between Time) to determine the actual round trip time. When using time-based three-dimensional measurements, each estimated delay can then be used to estimate the distance from the access terminal to the donor cell. The resulting position values can then be triangulated to estimate the location of the access terminal. In implementations that use fingerprint-based position estimation, fingerprints are obtained based on delay estimates (eg, 'indicating a propagation delay between the access terminal and the non-femtocell service area, the fingerprint is similar to the value in the database) Matching is performed to estimate the current location of the access terminal. For example, the accuracy of the timing-based location estimation scheme depends on the amount, the number of femtocell service areas of the 'J time delay, and the resolution of the gates that can be reported ( Res〇luti〇n). In some cases, the measurement resolution is typically 16 fineness per chip. The accuracy of the observed timing can be improved using the following techniques: Femtocell service area use; The increment of the slice is gradually adjusted to its reference pilot timing, and it is observed when the estimated delay 201225711 is increased by 1/16 chips. If it occurs after a small increment, the actual time delay is approximately the increase of the original estimate. "Factory less /" is 6 chips. Each of the exemplary embodiments of the timing based position estimation scheme will be described in detail below in conjunction with the discussion of the operational blocks of FIG. The block 302 of Figure 3 corresponds to block 2〇2 of Figure 2. Therefore, a decision is made to estimate at least one location of the access terminal. As indicated by block 304, the result of the decision as block 3〇2 is at least A message can be sent to a set of femtocell service areas requesting that the femtocell service area measure the uplink signal from the access terminal and/or request a signal propagation delay value from the femtocell service area. For example, The message may include an identifier associated with the access terminal (e.g., a long code) and a request for the femtocell service area to measure the pilot frequency signal from the access terminal and report the nickname propagation delay value. In the case where the uplink measurement is automatically performed in the femtocell service area, the message can simply be reported to the femtocell service area report for the designated access terminal (or alternatively, all measured access terminals) The signal propagation delay value may be in various forms in a manner similar to that described above. The operations of block 3〇4 may be performed by various entities. (and other operations of Figure 3.) For example, similar to Figure 2 above, such operations may be performed by a network entity, a nano/, a femtocell service area in a cell service area, or some other entity. As indicated by block 306, a signal propagation delay value corresponding to the signal measured by the femtocell service area is received from the femtocell service area. In the implementation of the request real 20 201225711 body, the access name is attached The nearby femtocell service area will send its delay value to the network entity. Conversely, in the implementation of the requesting entity is the service femtocell service area, the service provider pso* τ service house micro-cell service The zone will maintain its value so that it can be used to serve the hacker's delay in receiving the femtocell service area from other femtocell service areas. The received signal propagation delay value as shown in block 308 is compared to a plurality of sets of defined delay values associated with different locations. For example, the received signal propagation delay value can be compared to a previously defined plurality of sets of signal propagation delay values stored in the database to identify (eg, predict) one or more that substantially match the received signal propagation delay value. Groups. The location of the access terminal can be estimated based on the location of the access terminal, e.g., based on the block 3〇8 & comparison, as shown in block 310, based on the location associated with the identified group described in block 〇8. In the case of a number of identified groups, the estimated positions are calculated as a function (e.g., average, median, etc.) of the locations associated with the groups. As a specific example, a fingerprint corresponding to the received signal propagation delay value is matched with a database containing a plurality of sets of signal propagation delay values, wherein each set of defined signal propagation delay values corresponds to a coverage area of the femtocell service area The only one of a plurality of defined positions (points). Based on the values, the most approximate point of the fingerprint with the decision is predicted. For example, the received signal propagation delay value can be represented by {Dn,, Dn . . . . The set of points that maximize the probability function based on the signal propagation delay values can then be determined and used to estimate the location of the access terminal. Referring now to FIG. 4, the accuracy of the uplink-based location estimation is limited via the amount of femtocell service 21 201225711 that can be used to sense the access terminal to be successfully decoded at the femtocell service area. Uplink number seven (eg, pilot tone, the received snr should be greater than the sensing threshold. If the access terminal transmit power is too low, the number of femtocell service areas that are difficult to successfully decode the uplink signal may be Very small. Therefore, the accuracy of position estimation may be affected. According to the teachings of the present application, in order to increase the number of femtocell service areas that can measure the uplink, power control parameters for accessing the terminal (for example, Ecp/Nt) The target) may be added at the femtocell service area in an active set of access terminals, thereby causing the access terminal to temporarily increase its uplink transmit power. Thus 'between the position estimation procedure and during normal operational operations' Different transmit power control parameters can be defined for the access terminal. The increase in power control parameters (eg, target Eep/Nt) will also increase the common pass. Interference in the uplink of the macro cell service area in the channel arrangement. However, the path loss from the access terminal to the serving femtocell service area is generally lower than the typical path loss to the macro cell service area. Very small 'so the increase in the target is acceptable for a typical arrangement. In addition, the power control parameters can be selectively increased on the located access terminal. 〆山..~~啊·^ π湖地地立As shown in the block diagram of the exemplary embodiment of the end transmit power control scheme, at some point in time, a decision is made to the end of the access location. As described above, the access terminal may be implemented by the access terminal. The cell service area, the network entity, or some other entity makes the decision 2012. As shown in block 404, the bamboo gas + 1^1<. 岍 is not the result of the decision of block 4〇2,

The message can be sent to the -group femtocell service area from the IS microcell service "measuring the upstream material from the access terminal; 7 and = requesting uplink measurement information from the femtocell service area. Example:: The information may include an identifier associated with the access terminal (eg, long code = and for the femtocell service area measurement from the access terminal (four) pilot 并且 and sent for access ^ too - r earth, 丨A 'sub-fetch this request may be an indication of the uplink signal decoded (eg, based on successful decoding may report the measured signal strength). The operation of block 4G4 may be performed by various entities &quot ; and other operations in Figure 4). For example, similar to Figure 2 above, such operations can be performed by the entity, the femtocell service area in the femtocell service area, or some other entity. As indicated by block 406, an uplink measurement based on the femtocell service area attempt to measure the uplink. As indicated by block 408, based on the information, a determination is made whether at least a limited number (e.g., four) of the femtocell service areas receive signals of sufficient quality from the access terminal. As indicated by blocks 410 and 412, if a sufficient number of femtocell service areas have not received a sufficient quality signal from the access terminal, a signal is sent to adjust the transmit power of the access terminal. The signal may include, for example: a signal such as a fast power control signal to increase/decrease the transmit power; information; or some other suitable information that may be used to adjust the transmit power. 23 201225711 , In: Beibei, the signal specifies the change in the power control parameters. The picocell service area uses the power control parameters to adjust the transmit power. For example, (eg, by the TM sends the signal::: a picocell service area and instructs the femtocell service area to adjust (eg, increase) the power control set point for accessing the terminal. Here, the femtocell service area can Is any femto, cell service area for the access terminal's active towel. This is because the femtocell service area is allowed to control the transmit power of the access terminal. Therefore, the signal can be sent to Taking the serving femtocell service area of the terminal or any other femtocell service area in an active set. In an implementation in which the operations of Figure 4 are performed by the active set of femtocell service areas, the signal of block 412 can be sent to access. The terminal also instructs the access terminal to increase the transmit power. For example, as a result of the decision of block 4〇8, the femtocell service area can adjust the power control set point for accessing the terminal. Then 'received from the access terminal After the signal, the serving femtocell service area compares the received signal with the adjusted power control set point (eg, to determine whether To the set point). Based on the comparison result, the access terminal sends a signal to the access terminal (eg, including an indication of "increase power"). As indicated by the arrow from block 412 to block 406, the signal can be repeatedly transmitted. Until at least a defined number of femtocell service areas receive a sufficient quality signal from the access terminal. As indicated by block 414, a sufficient quality signal from the access terminal is received in a sufficient number of femtocell service areas. The following can terminate the position estimation based power control routine 2012 201211. In addition, once the position estimation procedure is completed, a signal (or multiple signals) can be sent to restore the access terminal transmit power to its previous settings. For example, remain in service The power control parameters at the home microcell service area can be restored to their previous values. Typically, the above location estimation technique relies on obtaining the fingerprint of the access terminal and matching it to the database. The more items present, the triangular amount The better the measurement, so it is expected to increase the number of items in the fingerprint database. The change in the project is also a factor because the path loss typically has a high gradient in the indoor environment. Since the path # at a point away from the femtocell service area is not a good value but due to channel attenuation and The distribution of multipath phenomena, so the variation and measurement error of these items at the same point over time is also important. Since the database can be fixed, the predicted points will change over time for fixed locations in space. Measurement errors will also cause such errors. To overcome some of these shortcomings and to improve the system, one or more of the following techniques can be used. In some cases, a combination of the above schemes for position measurement can be used. To combat the attenuation. To improve the accuracy of the distance estimation, the teachings of the present invention can be used with downlink (DL) based measurements (eg, where the access terminal measures the received k-number strength or from the femtocell service area) The timing of the received signals is combined with other radio technologies (eg, Wi_Fi) to estimate the distance. In some DL implementations, a database of macro path loss is generated. In this case, CFS can be used to obtain macro path loss measurements, which can be used as an extra degree in the fingerprint. It should be noted that mapping of macro path loss can be difficult because it uses knowledge of the location of the macro cell service area and, in general, makes all the detailed measurements around the desired area. The total interference on the macro channel or the femto channel can also be used for the same (4), although the magnitude of the gradient may not be as strong as the path loss. In some implementations, the structural map of the building and other more advanced related information can be used to modify the information that can be used to develop probabilistic models of the actions that can be used in the particle filter. The Markov model can be developed to model the motion of the access terminal as a finite state space. These methods can achieve advanced improvements because the indoor motion in a given space can be greatly predicted based on the importance of different areas within the building and the physical limitations of the wall. In some implementations, a beamforming beacon transmitter can be used to help extract more from each femtocell service area measurement. With an omnidirectional antenna, only path loss can be measured, which in a sense locates the access terminal in a circle around the femtocell service area. Conversely, the use of a beamforming transmitter' can also clarify the specific location of the user, and thus the position estimate would be better. In some navigation-related implementations, the system can use information from past and current measurements' as well as the user's past and current predicted locations. In addition to this, the system will attempt to take advantage of the building's own layout and floor plans. The system will use the floor plan and other meta-information to predict the user's most likely next position, as it will know the physical limit (through the wall) and location 26 201225711's welcome (from the squeezing source or building) The surface map itself knows the set of possible points that are restricted. If the system instructions direct the user from point A to point B, the system knows its recommended path and thus locates the user and guides the user along the path. By using the position estimation technique taught in the present case, the user of the access terminal can advantageously use the location change based service even in an indoor environment, for example, the user can locate her/self on the map indoors and Guide to the desired area. Users can locate their own and friends' locations in public, find paths to their points of interest, and receive information about services around them. Companies deploying femtocell service areas are able to track their resources and people and manage their employees efficiently. 5 illustrates several exemplary components (represented by corresponding blocks) that may be incorporated into a node to perform the operations related to transmit power control as taught herein, such as access terminal 502, access point 5 〇4 and network entity 506 (e.g., access terminal 〇2, access point 104, and network entity 112, respectively, corresponding to Figure!). The components can also be incorporated into other nodes in the communication system. For example, other nodes in the system may include components similar to those described for one or more of access terminal 502, access point 504, or network entity 506 to provide similar functionality. Likewise, a given node can include the one or more components. For example, an access point can include multiple transceiver components that enable access points to operate on multiple carriers and/or communicate via different technologies. As shown in Figure 5, access terminal 502 and access point 504 each include one or more wireless transceivers (represented as transceiver 508 and transceiver 510, respectively) that communicate with other nodes using 27 201225711. Each transceiver 508 includes a transmitter 512 receiver 514 for transmitting signals (e.g., messages, measurement reports, indications, other types of information, etc.), and receiver 514 for receiving nicknames (e.g., messages, FX signal, pilot frequency signal, position estimation related parameters, other types of information, etc.). Similarly, each transceiver includes a transmitter 516 and a receiver 518 for transmitting an L number (eg, message, request, indication, FL signal, pilot frequency signal, position estimation related parameters, other types of information). Etc.) The receiver is used to receive signals (eg, messages, measurement reports, other types of information, etc.). Access point 504 and network entity 506 each include one or more network interfaces (represented as network interface 520 and network interface 522, respectively) for communicating with other nodes (e.g., other network entities). For example, network interface 520 and network interface 522 can be configured to communicate with one or more network entities via a wire-based or wireless back-up or backbone. In some aspects, network interfaces 520 and 522 can be implemented as transceivers (eg, including transmitter and receiver components) configured to support wired-based or wireless communication (eg, transmitting and receiving) : signals, messages, measurement reports, indications, position estimation related parameters, signal strength information, delay values, other types of information, etc.). Accordingly, in the example of FIG. 5, network interface 520 is shown to include a transmitter 524 for transmitting signals and a receiver 526 for receiving ##. Similarly, network interface 522 is shown to include a transmitter 528 for transmitting signals and a receiver 530 for receiving signals. 28 201225711 Access terminal 502, access point 504, and network entity 5〇6 also include Other components that can be used to support the power control related operations taught in this case. The access terminal 502 includes a processing system 532 for the function of the beta supply/location estimation (e.g., determining the location of the access terminal to be evaluated) and for providing other processing functions. Similarly, the access point includes a processing system 534 'processing system for providing functionality related to location estimation (eg, 'receive signal strength information, determine associated path know value, # ai access terminal location, determine access terminal At least one location to be estimated, transmitting at least one heart for requesting signal strength information, transmitting a signal for adjusting a transmission power of the access terminal, adjusting a power control set point, receiving a signal from the access terminal, and comparing the received The signal and the adjusted power control set point, the received signal propagation delay value, the received signal propagation delay value and the defined plurality of sets of delay values are used to signal the signal propagation delay value, and are used to provide other processing functions. Similarly, network entity 506 includes processing subsystems, and processing system 536 is operative to provide functionality related to location estimation (e.g., as described above for processing system 543) and with /μ甘rfc*. For other processing functions. The access terminal 502, the access point 5〇4, and the network entity (10) respectively include memory components 538, 540, and 542 for storing information (eg, fingerprint values, measurement report information, inter-values, parameters, etc.) ( For example, each includes a memory device). In addition, access...end 502, access point 5〇4, and network entity 5〇6, respectively, are included for providing an indication (eg, an audible and/or visual indication) to a user and/or for receiving usage. The user input (for example, 'based on the user's driving of a sensing device such as a keyboard, a touch-screen glory, a microphone, etc.) is set to be 1972, 544, and 546. For convenience, the access terminal 502 and access point 504 shown in Figure 5 includes components that can be used in the various examples described herein. In fact, the blocks shown can have different functions in different implementations. For example, processing systems 532, 534, and 536 will be configured to support different operations in implementations that utilize different wireless communication technologies. The components of Figure 5 can be implemented in a variety of ways. In some implementations, the components of FIG. 5 can be implemented in one or more circuits, such as one or more processors and/or one or more ASICs (which can include one or more processors). Here, each circuit (e.g., a 'processor) may use and/or merge data memory 'data memory' for storing information or executable code used by the circuit to provide functionality. For example, some of the functions represented by block 508 and some or all of the functions represented by blocks 532, 538, and 542 may be performed by one or more processors of the access terminal and the data memory of the access terminal (eg, via execution of appropriate code and / or via a suitable configuration of the processor component). Similarly, some of the functions represented by block 510 and some or all of the functions represented by blocks 52A, 534, 5 40, and 5 44 may be accessed by the access point - or multiple processors and access points of the data memory (eg, This is accomplished via implementation of human code and/or via suitable configuration of processor components. Likewise, some or all of the functions represented by blocks 522, 536, 542, and 546 may be "by the implementation of suitable code and/or via the execution of appropriate code and/or via one or more processors and network entities of the network entity. The human component configuration of the processor component is implemented as described above. In some aspects, the teachings of the present invention can be used to include the size of the 2012 201211 set size cover (for example, the type is called macro set fine).

‘such as 3G

3G network large area cellular network WAN) and smaller scale network environment, typically called

Such as 'for a more robust user experience. Access points for smaller scale coverage are in other locations. In some aspects, smaller coverage nodes can be used, in-building coverage, and different services (for example, in the description of the case t, a node that provides coverage in a relatively large area (eg, 'access point') T is called a giant Collecting access points, nodes that provide coverage in relatively small areas (eg, homes) may be referred to as femto access, and the teachings of this case may apply to nodes associated with other types of coverage areas. For example, A pico access point may provide coverage over an area that is smaller than the macro area and larger than the femto area (eg, coverage within a commercial building). In various applications, other terms may be used to represent a macro access point, femto A node of an access point or other access point type. For example, a macro access point may be configured or referred to as an access node, a base station, an access point, an evolved node B, a macro cell service area, etc. The femto access point may be configured or referred to as a home node B, a home evolved node B' access point base station, a femto cell service area, etc. In the implementation of the 'point' can be associated with one or Multiple cell service areas or sectors are associated (eg, 'nodes are referred to or divided into one or more cell service areas or sectors.) with macro access points, femto access points, or pico access points The cell service area or sector associated with 31 201225711 may be referred to as a macro cell service area, a femto cell service area, or a picocell service area, respectively. Figure 6 illustrates a wireless communication system 600 that is configured to support multiple uses. The teachings of the present invention can be implemented. The system provides communication for a plurality of cell service areas 602, for example, a macro cell service area, wherein each cell service area is accessed by a corresponding access point 6〇4 (eg, The services are taken from points 604A-604G). As shown in Figure 6, access terminals 6〇6 (e.g., access terminals 606A-606L) may be distributed over time throughout the various locations of the system. For example, each access Terminal 6G6 can communicate with one or more access points 604 on the forward link (FL) and/or reverse link (RL) at a given time, depending on whether access terminal 6〇6 is active and Whether it is in soft handover. Wireless communication system 6〇 〇 can provide services in a large geographical area. For example, the macro cell service area 6〇2A 6〇2g can cover several streets or rural environments. Figure 7 shows an example of communication system 7 In the meantime, one or more of the femto access points are arranged in a network environment. Specifically, the system includes a plurality of femto access points 710 (eg, femto access points 71〇8 and 7i〇b) , installed in a relatively small scale network environment (eg, in one or more user premises 730). Each femto access point 710 can be via a DSL router, cable modem, wireless link, or Other means of connection (not shown) are integrated into the wide area network 740 (eg, the Internet) and the mobile service provider, as described below, each of the femto access points can be configured to be associated with each other. The access terminal 720 (e.g., access terminal 720A) and optionally other (e.g., mixed or foreign) access terminal 32 201225711 end 720 (e.g., access terminal 72〇b) serve. In other words, access to the femto access point 7丨〇 can be restricted such that a given access terminal 72 can be serviced by a specified set of (eg, home) femto access points 71,, The service cannot be performed by any non-designated femto access point 7 (e.g., a neighboring femto access point 71A). Figure 8 illustrates an example of an overlay map 8B in which a plurality of tracking areas 802 (or routing areas or location areas) are defined, each tracking area including a plurality of macro coverage areas 804. Here, the coverage areas associated with the tracking areas 8〇2Α, 8〇2Β, and 802C are illustrated by thick lines, and the macro coverage area 804 is represented by larger hexagons. Tracking area 820 may also include a femto coverage area 806. In this example, each femto coverage area 8〇6 (eg, 'femto coverage areas 806Β and 806C) has one or more macro coverage areas 804 (eg, macro coverage areas 8〇4Α and 8〇4Β) Shown inside. However, it should be clear that some or all of the femto coverage areas 〇6 may not be completely within the macro coverage area 804. In practice, a large number of femto coverage areas 806 (e.g., femto coverage areas 8〇6α and 8〇6d) may be defined within a given tracking area 802 or macro coverage area 804. Alternatively, one or more pico coverage areas (not shown) may be defined within a given tracking area 8〇2 or macro coverage area 8〇4. Referring again to Figure 7, the owner of the femto access point 71A can subscribe to mobile services provided via the mobile service provider core network 750, such as 3G mobile services. In addition, access terminal 720 is capable of operating in both a macro environment and a smaller scale (e.g., 'home) network environment. In other words, depending on the current location of the access terminal 720, the access terminal 72 can be serviced by the macro cell service area access point 760 associated with the mobile service provider core network 750, or by a Any one of the set of femto access points (e.g., femto access points 7A and 710A located within the corresponding user residence 730) is serviced. For example, when the user is not at home, he is served by a standard macro access point (eg, 'access point 760'), and when the user is at home, he is performed by a femto access point (eg, access point 71〇Α) service. Here, the femto access point 710 can be backward compatible with the existing access terminal 72. The femto access point 710 can be arranged on a single frequency or, alternatively, on a plurality of frequencies, depending on the particular configuration, the single frequency or one or more of the multiple frequencies can be One or more frequencies used by the set of access points (e.g., access point 760) overlap. In some aspects, access terminal 720 can be configured to connect to a preferred femto access point (e.g., a terminal femto access point of access terminal 72) as long as the connection is enabled. For example, as long as the access terminal 72A is located inside the user's home 73G, it is desirable that the access terminal 72qa can communicate only with the home femto access point 710A or 71B. In some aspects 'if the access terminal 72G operates within the macro-homed network 75' but is not (eg, as defined in the preferred roaming list) its optimal network is then accessed Terminal 720 can continue to search for the best network (e.g., preferred femto access point 710) using a Better System Reselection (BSR) sequence, which can be, and can be used to periodically scan the cat for available systems. To determine if a better system is currently available, and then obtain the (4) system. Access terminal 720 can limit the search for specific frequency bands and channels. For example, it may be 34 201225711 two 5/multiple femto channels 'all femto accesses in this region; all restricted femto access points) operate on the femto channel nano 2 (four) to repeat the most (four) Search. After a better sub-fetch is found, after the point 710, the access terminal 72 selects the femto access and then logs in on it when it is in its coverage area to add a heart, a t, a femto Access to an access point can be limited. A given femto access point may only provide some access terminals with an arrangement in a so-called restricted (or closed) access, and a given access terminal may act only by the macro cell service area. The network and a defined set of femto access points (e.g., femto access points 71G located within 73〇 of the respective user premises) are served. In some implementations, for at least one node (eg, access terminal), the access point may be restricted from providing at least one of the following: signal passing, data access, or service. In some aspects, a restricted femto access point (also referred to as a closed user group home node B) is an access point that provides services to a restricted set of access terminals. The group can be broadcast temporarily or permanently as needed. In some aspects, a Closed Subscriber Group (CSG) may be defined as a group access point (e.g., a two micro access point) of a common access control list of a common access terminal. Home Micro can have various relationships between a given 亳 pico access point and a given access terminal. For example, from the perspective of an access terminal, an open nano: access point may refer to a femto access point with unrestricted access (J. Pico access point). A restricted femto access point may refer to a femto access point that is restricted in some way (eg, access and/or login restricted). A femto access node may refer to an access terminal that has rights to A femto access point that is taken in its field (e.g., provides permanent access to a group of - or multiple access terminals). A hybrid (or guest) femto access point may refer to a femto access point where different access terminals are provided with different levels of service (eg, some access terminals may be allowed to partially and/or temporarily access, and Other access terminals may (4) allow full access). An alien femto access point may refer to a femto access point that the access terminal does not have access to or operates on except for possible emergency situations (e.g., '911 dialing). From the perspective of a perceptual femto access point, a home access terminal may refer to an access terminal that has access to a restricted femto access point disposed in a home of the access terminal (usually, home storage) The terminal has a long-term access to the femto access point). A guest access terminal may refer to an access terminal having temporary access to a restricted femto access point (eg, based on wear time, usage time, byte, number of connections, or some (some) other criteria) And restricted). An alien access terminal may refer to an access terminal that does not have access to a restricted femto access point other than a possible emergency (eg, 911 dialing) (eg, does not have an identity to log in to a restricted femto access point) Code or licensed access terminal). For the sake of convenience, the present contents describe various functions in the context of a femto access point. However, it should be clear that a pico access point can provide the same or similar functionality for a larger coverage area. For example, the Pico Access Point 36 201225711 疋 疋 豕 豕 豕 微 微 微 微 微 微 微 微 。 can be defined for a given access terminal and so on. The teachings of this case can be used in a wireless multiplex access communication system that can simultaneously support communication for multiple wireless access terminals. Here, each terminal can communicate with one or more access points via transmissions on the forward and reverse links. The forward link (or downlink) refers to the communication link from the access point to the terminal, and the reverse link (or uplink) refers to the communication link from the terminal to the access point. These communication links can be established via single-input single-output systems, multiple-input multiple-output systems, or some other type of system. The ΜΙΜΟ system uses multiple (^^) transmit antennas and multiple (heart) receive antennas for data transfer. The chirp channel formed by the ^ transmit antenna and the % receive antennas can be decomposed into two independent channels, which are also referred to as spatial channels, where 乂丨. Each of the independent channels corresponds to one dimension. If additional dimensions established by multiple transmit and receive antennas are utilized, the Mm system can provide improved performance (e.g., higher throughput and/or better reliability). ΜΙΜΟ彡 can support time division duplex (tdd) and frequency division duplex (FDD 纟TDD system 'forward and reverse link transmission can be in the same frequency region', so the principle of mutual purity allows the reverse link Channel to estimate the forward link channel. This allows the access point to extract transmit beamforming gain on the forward link when multiple antennas are available at the access point. Figure 9 illustrates an exemplary MIM0 system_ The wireless device 91 is (for example, 37 201225711 2 and the wireless device 950 (for example, an access terminal). At the device 9i, a large amount of data stream is transmitted from the source 912 to the transmitting (τχ) data processor 9i4. Each data stream can be transmitted via each transmit antenna. The τ χ 处理器 processor 914 materializes, encodes, and interleaves the material for each data according to a particular coding scheme selected for the data stream. Encoded data. The _Μ technology can be used to multiplex the encoded data of each data stream with the pilot data. The pilot data is usually a known data pattern that is processed in a known manner and can be connected. The pilot data is used at the receiver system to estimate the channel response. The data string can be based on a particular modulation party # (eg, BPSK, QPSK, M-PSK ' or M-QAM) selected for the parent feed stream. The piloted and encoded data of the stream is modulated (i.e., symbol mapped) to provide modulation symbols. The data rate, coding, and modulation of each data stream can be determined via instructions executed by processor 93. The data memory 932 can store code, data, and other information used by the processor 93 or other components of the device 91. The modulation symbols for all data streams can then be provided to the processor 920 for processing. The modulator 920 can further process the modulation symbols (e.g., for 〇FDM). Subsequently, the τ χ MIM 〇 processor 92 提供 provides % modulation symbol streams to the transceivers (XCVR ) 922a through 922T. In some aspects, τ χ MIM The processor 92 applies beamforming weights to the symbols of the data stream and the antenna from which the symbol is transmitted. Each transmitter 922 receives the corresponding symbol stream and performs To provide a signal for one or more analog signals and further adjust (e.g., amplify, filter, and upconvert) analog signals to provide a modulated signal suitable for transmission over a chirp channel. Subsequently, respectively, from ^·Γ The antennas 924Α to 924Τ transmit 7W modulated signals from the transceivers 922A to 922T. At the device 95〇, the transmitted modulated signals are received by the % antennas 952A to 952R and received from each antenna 952. The arriving signals are provided to respective transceivers (XCVR) 954A through 954R. Each transceiver 954 adjusts (eg, filters, amplifies, and downconverts) the corresponding received k-number to digitize the conditioned signal. Samples are provided for further sampling and further processing to provide a corresponding "received" symbol stream. The receive (RX) data processor 960 then receives the % received symbol streams from the transceivers and processes them according to a particular receiver processing technique to provide a "detected" symbol stream. The RX data processor 960 then demodulates, deinterleaves, and decodes the parent detected symbol stream to recover the traffic data for the data stream. The processing performed by the Rx data processor 96 is complementary to the processing performed by the τ χ MIM 〇 processor 92 〇 and the τ χ data processor 914 at the device 91 。. The processor 970 periodically determines which precoding matrix to use (discussed below). Processing g 97G formulates a reverse link message comprising a matrix index portion and a rank value portion. Data memory 972 can store code, data, and other information used by processor 970 or other components of device 950. The reverse link message may include various types of information related to the communication link and/or the received data stream. The reverse link message can be processed by the τχ data processor 938, modulated by the modulator _, modulated by the transceiver 39 201225711 machines 954A through 954R, and sent back to the device 9iq, where the data processor 938 also receives from the data source 936 Multiple data streams of traffic data. j device 9Η) The modulated signal from device 95() is received by antenna 924, adjusted by transceiver 922, demodulated by demodulator 940 and used by Rx data processor 942 is processed to extract the reverse link signal transmitted by device 950. The processor 93 then determines which precoding matrix to use to determine the beamforming weight and then processes the message β. Figure 9 also illustrates The communication component, communication component, can include one or more components that perform position estimation control operations as taught in this disclosure. For example, the location estimate control component " can be used with processor 930 and/or other components of device 910 to estimate the location of another device (e.g., device 95A) as taught in this disclosure. It should be understood that for each of devices 910 and 950, the functionality of two or more of the described components may be provided by a single component. For example, a single processing component can provide the functionality of location estimation control component 99 and processor 930. The teachings of this case can be incorporated into various types of communication systems and/or system components. In some aspects, the teachings of the present disclosure can be used to support communication with multiple users via sharing of available system resources (eg, via one or more of a specified bandwidth, transmit power, encoding, interleaving, etc.). In a multiplex access system. For example, the teachings of the present invention can be applied to any one of the following techniques or other multiplex access technologies, or any combination thereof: a CDMA system, a multi-carrier CDMA (MCCDMA), a wide 201225711 frequency. CDMA (W-CDMA), High Speed Packet Access (HSPA, HSPA+) system, Time Division Multiple Access (TDMA) system, Frequency Division Multiple Access (FDMA) system, Single Carrier Frequency Division Multiple Access (SC) -FDMA) system, orthogonal frequency division multiplexing access (OFDMA) system, and the like. The wireless communication system using the teachings of the present invention can be designed to implement one or more standards such as IS-95, cdma2000, IS-856, W-CDMA, TDSCDMA, and other standards. A CDMA network may implement a radio technology such as Universal Terrestrial Radio Access (UTRA), cdma2000, or some other technology. UTRA includes W-CDMA and Low Chip Rate (LCR). The cdma2000 technology covers the IS-2000, IS-95, and IS-856 standards. A TDMA network can implement a radio technology such as the Global System for Mobile Communications (GSM). The OFDMA network can implement radio technologies such as evolved UTRA (E-UTRA), IEEE 802.1, IEEE 802.16, IEEE 802.20, Flash-OFDM®, and the like. UTRA, E-UTRA and GSM are part of the Universal Mobile Telecommunications System (UMTS). The teachings of this case can be implemented in 3GPP Long Term Evolution (LTE) systems, Ultra Mobile Broadband (UMB) systems, and other types of systems. LTE is a version of UMTS that uses E-UTRA. UTRA, E-UTRA, GSM, UMTS, and LTE are described in documents from an organization named "3rd Generation Partnership Project" (3GPP), and are called "3rd Generation Partnership Project 2" (3GPP2) Cdma2000 is described in the organization's documentation. Although certain aspects of the present content can be described using 3GPP terminology, it should be understood that the teachings of the present disclosure can be applied to 3GPP (eg, version 99, version 5, version 6, version 7) technologies as well as 3GPP2 (eg, lxRTT, lxEV- DORelO, RevA, RevB) technology and other technologies. 41 201225711 The teachings of this case can be incorporated, for example, in multiple devices or by multiple / (:, 'nodes) (for example, according to the teachings). A node that does not implement a certain aspect (for example, including an access point or an access terminal. ... line or point) may, for example, 'access terminal' may include, or be borrowed by the real person, Tian 6 or It is known to use a backup subscriber station, a subscriber unit, a mobile station/remote station, a remote line name, a mobile node, a mobile node, a user terminal, a user agent, a user equipment, or some other terminology. In an M^ system, the access terminal may include a bee=telephone, a radiotelephone, a communication period initiation protocol (SIP) telephone, a wireless [domain loop (WLL) station, a personal digital assistant (pda), with a benefit line connection. A handheld device, or an age-appropriate sigh that is connected to a wireless data modem. Accordingly, one or more aspects of the teachings of the present invention can be incorporated into a telephone (eg, a cellular phone or a smart phone), Computer (eg, laptop 1), portable communication device, portable computing device (eg, personal data assistant), entertainment device (eg, music device, video device, or satellite radio), global positioning system , or any other suitable device configured to communicate via wireless media. The access point may include, or be implemented as, or known as Node B, Evolution Node B 'Radio Network Controller (_(:), Base) Station (BS), Radio Base Station (RBS), Base Station Controller (BSC), Base Transceiver Station (BTS), Transceiver Function (TF), Radio Transceiver, Radio Router, Basic Service Set (BSS), Extension Service Set (ESS), Macro Cell Service Area, Macro Node, Home eNB (HeNB), Femto Cell Service Area, 亳Pico Node, Pico Node' or some other similar term. 42 201225711 In a sample, A point (eg, an access point) may include an access node for a communication system. For example, such an access node may be readable by a wired or wireless communication link to the network to provide connectivity or provision to the network. A connection to a network (eg, a wide area network such as the Internet or a cellular network). Accordingly, an access node may cause another node (eg, an access terminal) to access a network or some other functional entity. , It will be understood that one or both of the nodes are portable 'or, in some cases, relatively unportable. 疋 In addition, it should be understood that the wireless node may be in a non-wireless manner (eg, left by wire) Connecting) transmitting and/or receiving information. Accordingly, the receivers and transmitters discussed herein may include suitable communication interface components (eg, electrical or optical interface components) for communicating via non-wireless media. The wireless node may be via - or Multiple wireless communication links are communicating, the one or more wireless communication links being based on or otherwise supporting any suitable wireless communication technology. For example, in some aspects, a wireless node can be associated with a network. In some aspects, the network can include a local area network or a wide area network. The wireless device can support or otherwise use one or more of various wireless communication technologies, protocols, or standards as discussed herein (eg, CDMA, TDMA, OFDM, OFDMA, WiMAX, Wi_Fi, etc.). Similarly, a wireless node may support or otherwise use one or more (5) of various corresponding modulation or multiplexing schemes. The wireless node may thus include suitable components (e.g., 2 mediation planes) to establish one or more wireless communication links using the above or other wireless communication technologies and to communicate via the wireless communication links. For example, a wireless node may include a wireless transceiver with associated 43 201225711 transmitter and receiver components, and the wireless node may include various components (e.g., signal generators and signal processors) that facilitate communication over the wireless medium. In some aspects, the functions described herein (e.g., with reference to one or more of the drawings) may correspond to the "components for" function similar to that specified in the accompanying claims. Referring to Figures 10-12, devices 10〇〇, 11〇〇, and 12〇〇 are represented as a series of associated functional modules. Here, for example, at least in some aspects, the module 1〇〇2 for receiving signal strength information may correspond to the receiver discussed herein. For example, at least in some aspects, the module 1004 for determining relative path loss values may correspond to the processing system discussed herein. For example, at least in some aspects, the module 1-6 for estimating the location of the access terminal may correspond to the processing system discussed herein. For example, at least in some aspects, the module 1 8 used to determine the location of the access terminal to be estimated may correspond to the processing system discussed herein. For example, at least in some aspects, the module 1〇1〇 for transmitting a message requesting signal strength information may correspond to the transmitter discussed herein. For example, at least in some aspects, the module 1 〇 12 for transmitting signals to control the transmit power of the access terminal may correspond to the transmitters discussed herein. For example, at least in some aspects, the module 11〇2 used to determine at least one location of the access terminal to be estimated may correspond to the processing system discussed herein. For example, at least in some aspects, the module 11〇4 for transmitting information to control the transmit power of the access terminal may correspond to the transmitter discussed herein. For example, at least in some aspects, the module 1106 for adjusting the power control set point may correspond to the processing system discussed herein. For example, at least in some aspects, the module 11 〇 8 for receiving a letter from the access terminal 44 201225711 may correspond to the receiver discussed in this discussion. For example, at least in some aspects, the module 1110 for comparing the received signal to the adjusted power control set point may correspond to the processing system discussed herein. For example, at least in some aspects, the module 1202 for receiving signal propagation delay values may correspond to the receivers discussed herein. For example, at least in some aspects, the module 1204 for comparing the received signal propagation delay value to the plurality of sets of defined delay values may correspond to the processing system discussed herein. For example, at least in some aspects, the module 〇2〇6 used to estimate the location of the access terminal may correspond to the processing system discussed herein. For example, at least in this case, the module 12〇8 used to determine the location of the access terminal to be estimated may correspond to the processing system discussed herein. For example, at least one of the samples, the module 121 for transmitting a message requesting a signal propagation delay value may correspond to the transmitter discussed herein. For example, at least in some aspects, the module 12丨2 for transmitting the k number to adjust the transmit power of the access terminal may correspond to the transmitter discussed herein. The functions of the modules of Figures 10-12 can be implemented in various ways consistent with the teachings of the present invention. In some aspects, the functionality of the modules can be implemented as one or more electronic components. In some aspects, the functions of the modules can be implemented as packages.

45 201225711 In a second embodiment, an apparatus for communication implemented in accordance with the teachings of the present invention includes a receiver configured to receive signals received from the access terminal with the plurality of femtocell service areas from the plurality of femtocell service areas a corresponding signal propagation delay value; and a processing system configured to compare the received signal propagation delay value with a township defined delay value associated with the different location, and further configured to estimate the comparison based on the comparison The location of the access terminal. In some embodiments, the comparing includes identifying at least one of the plurality of sets of defined delay values that substantially match the received signal propagation delay value. In some embodiments, the location estimate is based on a location associated with the identified at least one set of defined delay values. In some embodiments, the processing system is further configured to determine a location of the access terminal to be estimated; and the apparatus further comprises: a transmitter configured to transmit at least one message requesting a signal propagation delay value to the femtocell service area , wherein the message is sent according to a decision result of estimating the location of the access terminal. In some embodiments, the apparatus further comprises: a transmitter configured to transmit a signal to control the transmit power of the access terminal to facilitate reception of the signal by the femtocell service area.纟- Some implementations' (4) To estimate the result of the location of the access terminal, send the message. In some embodiments, the message is transmitted based on whether at least a defined number of the femtocell service areas have received a decision from the access terminal with a signal of sufficient quality. In some embodiments, a method implemented in accordance with the teachings of the present disclosure includes one or more operations in one or more of the above aspects. In some embodiments, a computer program product implemented in accordance with the teachings of the present invention includes code configured to cause a computer to provide functionality corresponding to one or more of the above aspects. 46 201225711 It should be understood that any use of the 43⁄4 notes such as "First," "Different" in this case does not generally limit the number or order of such elements. In the text: : These marks serve as a convenient way to distinguish between two instances of two or more elements or elements. Therefore, the reference to the first and second elements does not mean that only two elements can be used or that the first element must be in some way: the formula precedes the second element. Moreover, unless stated otherwise, a group of elements can include two or more elements. Further, the term "at least one of the use in the specification or claim" or "or" in the form of "A, B, or C" means "A or any combination of the four." Those skilled in the art should understand that information and signals can be represented using any of a variety of different techniques and methods. For example, the materials, instructions, commands, information, signals, symbols, and chips mentioned in the above description may be represented by voltages, currents, electromagnetic waves, sub-fields, light fields, or particles, or any combination thereof. It will be understood by those skilled in the art that the various logical blocks, modules, processors, components, circuits, and algorithm steps described in connection with the aspects of the present invention can be implemented as electronic hardware (for example, digital Implementation, analogy implementation 'or a combination of both, which can be designed with or without the original code or some other technique), various forms of programming or design code containing instructions (for convenience, this order can be called " Software" or "software module") or a combination of both. The various exemplary components, blocks, modules, circuits, and step functions have been generally described above for the sake of slag 地 地 地 地 地 地 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 As far as this function is implemented as hardware and as software, it depends on the specific application and the design constraints imposed on the entire system. The application in the field, which is modified by the tenth party, can be described for each specific type, but the description of this recording should not be construed as deviating from the scope of protection of the present invention. Now, in the integrated circuit (IC), the access terminal, or the access point, various exemplary logics can be implemented by the integrated circuit (IC), the access terminal, or the access point. Blocks, modules, and circuits 1C may include general purpose processors, digital signal processors (ASICs), special application integrated circuits (ASICs), field programmable gate arrays (FPGAs), or other programmable logic devices. Individual gate or transistor logic, individual hardware components, electronic components, optical components, mechanical components, or any combination of the above designed to perform the functions recited herein and may be performed within 1C, outside 1C, or both Code or instruction. The general purpose processor may be a microprocessor, or the processor may be any general processor, controller, microcontroller or state machine. The processor can also be implemented as a combination of computing devices, e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, a combination of one or more microprocessors and a Dsp core, or any other such structure. It is understood that the specific order or hierarchy of steps in the disclosed processes are examples of the exemplary methods. It is understood that the specific order or hierarchy of steps in the process may be rearranged, while remaining within the scope of the present disclosure. The accompanying method claims are provided to the elements of the various steps in the exemplary embodiments and are not intended to In one or more exemplary embodiments, the functions may be implemented in hardware, software, hard work, or any combination thereof. If implemented in software, the functions can be stored as - or multiple instructions or code on a computer readable medium or via a computer readable medium. Computer readable media includes computer storage media and communication media including any media that facilitates the transfer of computer programs from one location to another. The storage medium may be any available media that can be accessed by a computer. The computer readable medium can include two non-EEPR0M, CD_R〇M or other optical disc storage media, disk storage media or other magnetic storage device or It can be used for any other medium that carries or stores the required code in the form of an instruction or data structure and that can be accessed by a computer. In addition, any connection is appropriately referred to as a computer readable medium. For example, if you use coaxial, fiber-optic, twisted-pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwave to reflect software from a website, feeder, or other remote source, then The definition of the media includes the aforementioned coaxial performance, fiber optic cable, twisted pair, digital subscriber line (DSL) or wireless technologies such as infrared, radio and microwave. As used herein, 'disks and optical discs include compact discs (CDs), laser discs, compact discs, digital versatile discs (DVDs), floppy discs, Blu-ray discs, in which discs typically reproduce data via magnetism, and discs are utilized. The laser reproduces the Beicai fight through the light technology. Thus, in some aspects, computer readable media can include non-transitory computer readable media (e.g., tangible media). In addition, the 'in-the-skin' computer-readable media may include a temporary computer that can be used to sell media (eg, for identification, L-. 唬). The combination of the above-mentioned valleys should also be included in the range of computer-readable media. Inside. It should be understood that computer readable media can be implemented in any suitable 49 201225711 computer program product. As the case may be, the term "decision" includes a wide range of actions. For example, a decision may include computing, computing, processing, deriving, querying, reviewing (eg, viewing in a table, database, or another material - a bar structure), ascertaining, and the like. In addition, "decision" may include receiving (e.g., receiving information), accessing (e.g., accessing data in memory), and the like. In addition, "decisions" can include resolution, selection, selection, establishment, and so on. The aspects disclosed hereinabove are described above in order to enable those skilled in the art to practice or practice the invention. Various modifications to the above-described aspects will be apparent to those of ordinary skill in the art, and the general principles defined by the present invention may be made in other aspects without departing from the scope of the invention. The present invention is not intended to be limited to the details provided herein, but is intended to be in accordance with the broad scope of the principles and novel features of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS These and other exemplary aspects of the present disclosure will be described in the detailed description and the accompanying claims and the accompanying drawings, wherein FIG. 1 is a communication system suitable for estimating the position of an access terminal. A simplified block diagram of several exemplary t-likes; ▲ Figure 2 is an estimate of the location of the access terminal based on the relative path loss value. A flowchart of several exemplary aspects of the operations performed; FIG. 3 is performed based on the timing of the uplink key U measured by the plurality of femtocell service areas, combined with an estimate of the location of the access terminal OPERATION 50 201225711 Flowcharts of several exemplary aspects; FIG. 4 is a flow diagram of several exemplary aspects of operations performed in conjunction with adjusting access terminal transmit power for access terminal location estimation; FIG. A simplified block diagram of several exemplary aspects of components that can be used in a communication node; Figure 6 is a simplified block diagram of a wireless communication system; Figure 7 is a simplified block diagram of a wireless communication system including a femto node; A simplified block diagram showing a coverage area of a wireless communication; FIG. 9 is a simplified block diagram of several exemplary aspects of a communication component; and FIG. 2 is a device configured to support an access terminal location estimate as taught herein. A simplified block diagram of several exemplary aspects. In accordance with common practice, the various features illustrated in the drawings may not be Therefore, the size of each feature can be enlarged or reduced for clarity. Additionally, for the sake of clarity, the drawings may be simplified: thus, the drawings may not depict all of the components of a given device (e.g., device) or method. Finally, the same element symbols are used throughout the specification and the drawings to indicate the same features. τ [Description of main component symbols] 100 Communication system 102 Access terminal 104 Access point 106 Access point 108 Access point 51 201225711 110 Access point 112 Network entity 114 Database 116 Access terminal location estimation 118 Access terminal location Estimation 120 Position Estimation Based on Relative Path Loss 122 Time Series Based Position Estimation 124 Access Terminal Transmit Power Control 202 Block 204 Block 206 Block 208 Block 210 Block 302 Block 304 Block 306 Block 308 Block 310 Block 402 Block 404 Block 406 Block 408 Block 410 block 412 block 52 201225711 414 block 502 access terminal 504 access point 506 network entity 508 transceiver 510 transceiver 512 transmitter 514 receiver 516 transmitter 518 receiver 520 network interface 522 network interface 524 transmitter 526 Receiver 528 Transmitter 530 Receiver 532 Processing System 534 Processing System 536 Processing System 538 Memory Component 540 Memory Component 542 Memory Component 544 User Peripheral 546 User Peripheral Device 53 201225711 600 Wireless Communication System 602A macro cell service area 602B macro cell service area 602C macro cell service area 602D macro cell service area 602E macro cell service area 602F macro cell service area 602G macro cell service area 604A access point 604B access Point 604C Access Point 604D Access Point 604E Access Point 604F Access Point 604G Access Point 606A Access Terminal 606B Access Terminal 606C Access Terminal 606D Access Terminal 606E Access Terminal 606F Access Terminal 606G Access Terminal 606H Access terminal 6061 access terminal 54 201225711 606J access terminal 606K access terminal 606L access terminal 7 0 0 communication system 710A femto access point 710B femto access point 720A access terminal 720B access terminal 730 user residence 740 WAN 750 Mobile Service Provider Core Network 760 Macro Cell Service Area Access Point 800 Coverage Map 8 0 2 A Chasing Area 8 0 2 B Tracking Area 8 0 2 C Tracking Area 804A Macro Coverage Area 804B Macro Coverage Area 806A Femto Coverage Area 806B Femto Coverage Area 806C Femto Coverage Area 806D Femto Coverage Area 900 ΜΙΜΟ System 910 Wireless 55 201225711 912 Source 914 Transmit (TX) Data Processor 920 ΤΧ ΜΙΜΟ Processor 922 收发 Transceiver (XCVR) 922 收发 Transceiver (XCVR) 924 天线 Antenna 924 天线 Antenna 930 Processor 932 Data Memory 936 Source 938 ΤΧ Data Processor 940 Demodulator (DEMOD) 942 RX Data Processor 950 Device 952 天线 Antenna 952R Antenna 954 收发 Transceiver (XCVR) 954R Transceiver (XCVR) 960 Receive (RX) Data Processor 970 Processor 972 Data Memory 980 Modulator 990 Position Estimation Control Component 1000 Device 56 201225711 1002 Module 1004 Module 1006 Module 1008 Module 1010 Module 1012 Module 1100 Device 1102 Module 1104 Module 1106 Module 1108 Module 1110 Module 1200 Device 1202 Module Group 1204 Module 1206 Module 1208 Module 1210 Module 1212 Module

Claims (1)

201225711 VII. Patent Application Range 1. A device for communication, comprising: a receiver configured to receive from a plurality of femtocell service areas and from an access measured by the femtocell service areas a signal strength information corresponding to the signal of the terminal; and a processing system configured to determine a relative path loss value associated with the femtocell service area based on the received signal strength information, and further configured to be based on the The relative path loss value estimates a location of the access terminal. 2. The device of claim 1, wherein: the determining of the relative path loss value comprises determining a difference between received signal strength values measured by different femtocell service areas in the femtocell service areas. And the determined relative path loss value includes the determined difference. Estimated packet of the location, 3. The device of claim 2, wherein the access terminal comprises: a comparison associated with a different location; and a relative path loss value determined by the determined relative path loss value and the group A location is identified based on the comparison. 4 If the request item is set, wherein the estimated portion of the location of the access terminal 58 201225711 includes: (d) determining the (iv) path loss value compared to the plurality of sets of defined relative path loss values associated with the different locations; A location is identified based on the comparison. 5. The apparatus of claim 1, wherein: the processing system is further configured to determine the location of the access terminal to be estimated; the apparatus further comprising: a transmit@, configured to transmit to the femto The cell service area requests at least one message of the signal strength information; and transmits the message according to a decision result of the location of the access terminal to be estimated. 6. The device of claim 1, wherein the device further comprises: a transmitter It is configured to transmit a signal to control the transmit power of the access terminal to facilitate the measurement of the signals by the femtocell service areas. 7. The apparatus of claim 6, wherein the signal is transmitted based on a result of a decision to estimate the location of the access terminal. 8. The apparatus of claim 6, wherein the signal is sent based on a decision to receive a signal of sufficient quality from the access terminal with respect to at least a defined number of the femtocell service areas. 9. A communication method comprising the steps of: receiving signal strength information corresponding to a signal from an access terminal measured by the femtocell service areas from a plurality of femtocell service areas; based on the received signal The intensity information determines relative path loss values associated with the femtocell service areas; and estimating a location of the access terminal based on the relative path loss values. 10) The method of claim 9, wherein: the determining of the relative path loss value comprises determining a difference between received signal strength values measured by different femtocell service areas in the femtocell service areas. And the determined relative path loss value includes the determined difference. 11. The method of claim 9, further comprising the steps of: determining to estimate the location of the access terminal; and transmitting a message to the femtocell service area requesting the signal strength information, wherein The decision result of the location of the access terminal is estimated to 'send the message. The method of claim 9, further comprising the steps of: transmitting 彳5 to control the transmit power of the access terminal to facilitate measurement of the signals by the 2012 201211 picocell service area. 13. Apparatus for communication, comprising: means for receiving, from a plurality of femtocell service areas, signal strength information corresponding to signals from the femtocell service area measured by the femtocell service area Means; means for determining a relative path loss value associated with the femtocell service regions based on the received signal strength information; and for estimating a location of the access terminal based on the relative path loss values member. 14. The device of claim 13, wherein: the decision of the relative path power value comprises determining a difference between received signal strength values measured by different pupillary cell service areas in the femtocell service areas. And the relative path loss value determined by the decision includes the determined difference. 15. The apparatus of claim 13, further comprising: means for determining a location of the access terminal to be estimated; and means for transmitting to the y messages requesting the signal strength information to the femtocell service areas And transmitting the message according to a decision result of estimating the location of the access terminal. 16. The apparatus of claim 13, further comprising: 61 201225711 means for transmitting a signal to control the transmit power of the access terminal to facilitate the measurement of the signals by the femtocell service area. 17. A computer program product comprising: a computer readable medium comprising code for causing a computer to perform the following steps: receiving from a plurality of femtocell service areas and from a memory of the femtocell service area Taking signal strength information corresponding to the signal of the terminal; determining a relative path loss value associated with the femtocell service area based on the received nickname strength information; and estimating the access terminal based on the relative path loss values a position. 18. The computer program product of claim 17, wherein: the relative path; the decision of the loss value comprises determining the received signal strength value measured by the different femtocell service areas in the femtocell service areas. The difference between the difference; and the determined relative path loss value includes the determined difference. 19. The computer program product of claim 17, wherein: the computer-accessible medium further comprises code for causing the computer to determine the location of the access terminal; the computer readable medium further comprising The computer transmits at least one message 62 201225711 requesting the signal strength information to the femtocell service areas; and transmitting the message based on a result of the determination of the location of the access terminal to be estimated. 20. The computer program product of claim 17, wherein the computer readable medium further comprises means for causing the computer to send a signal to control transmit power of the access terminal to facilitate measurement of the femtocell service area. The code of the signal. 21. An apparatus for communication, comprising: - a processing system 'configured to determine at least one location to estimate an access terminal; and a transmitter ' configured to send a signal to adjust the signal based on a result of the determining The transmit power of the access terminal. 22. The device of claim 21, wherein the signal specifies a change in power control parameter used by a femtocell service area in the active set of the access terminal to adjust the transmit power of the access terminal. 23. The device of claim 21, wherein the signal indicates that a serving femtocell service area for the access terminal changes a rate control set point for the access terminal. The device of claim 21, wherein: 201225711 the processing system is further configured to adjust a power control set point for the access terminal based on the determined result of the decision; the device further comprising: a receiver, It is configured to receive a signal from the access terminal; the processing system is further configured to compare the received signal with the adjusted power control set point; transmit the signal based on a result of the comparing; and the signal Instructing the access terminal to increase transmit power. 25. The apparatus of claim 21, wherein the signal is transmitted based on a decision result as to whether the at least one of the plurality of said femtocell service areas received a signal of sufficient quality from the access terminal. 26_ The device of claim 25, wherein the defined number is four. 27. The apparatus of claim 21, wherein the signal for adjusting the transmit power (10) of the access terminal is repeatedly transmitted until at least a defined number of femtocell service areas are received from the access terminal. Quality 丄_Buy"^5 28. A communication method comprising the steps of: determining to estimate - at least one location of the access terminal; and transmitting, by the terminal, a signal according to a result of the decision to adjust the access Transmit power. The method of claim 28, wherein the signal indicates that a power control set point for the access terminal is changed for a serving femtocell service area of the access terminal. The method of claim 28, further comprising the steps of: adjusting a power control set point for the access terminal based on a result of the decision; receiving a signal from the access terminal; and receiving The signal is compared to the adjusted power control set point; wherein: the signal is transmitted based on a result of the comparison; and the signal indicates that the access terminal increases transmit power. 31. The method of claim 28, wherein the signal is transmitted based on a decision as to whether at least a defined number of the femtocell service regions received a signal of sufficient quality from the access terminal. 32. An apparatus for communicating, comprising: means for determining at least one location of an access terminal to be estimated; and for transmitting a signal to adjust a transmit power of the access terminal based on a result of the determining Components. m means the device of claim 32 wherein the (four) number indicates that a service femtocell service area for the access terminal 65 201225711 changes the power control set point for the access terminal. 34. The apparatus of claim 32, further comprising: means for adjusting a power control set point for the access terminal based on the result of the determining; for receiving a signal from the access terminal And a means for comparing the received signal with the adjusted power control setting; wherein: the line transmits the signal according to a result of the comparing; and the k indicates that the access terminal increases transmission power. 35. The apparatus of claim 32, wherein the signal is transmitted based on a decision as to whether there is at least a defined number of femtocell service areas from the access terminal to a signal of sufficient quality. 36. A computer program product comprising: a computer readable medium comprising code for causing a computer to perform the following steps: * deciding to estimate at least one location of an access terminal; and a last name according to the decision The Do, Lan, Fuxi, D, D fruit sends a signal to adjust the transmit power of the access terminal. Wherein the signal indicates that a service femtocell service area of the access terminal changes a power control set point for the access terminal, as in the computer program product of claim 36. 38. The computer program product of claim 36, wherein: the computer readable medium further comprises code for causing the computer to adjust a power control set point for the access terminal based on a result of the decision; The computer readable medium further includes code for causing the computer to receive a signal from the access terminal; the computer readable medium further comprising means for causing the computer to receive the signal and the adjusted power control settings a code for comparison; transmitting the signal based on a result of the comparison; and the signal indicating that the access terminal increases transmit power. 39. The computer program product of claim 36, wherein the signal is transmitted based on a decision as to whether at least a defined number of the femtocell service areas received a signal of sufficient quality from the access terminal. 67