MX2008005460A - Seamless inter-frequency handoff in wireless communication networks - Google Patents

Abstract

Embodiments are described in connection with seamless inter-frequency handoff in a wireless network. Provided is a method that includes reporting to an access network sector pilot strength information for at least one frequency member in a message specified in an active set management protocol. Information regarding at least another frequency member is received in a message specified in the active set management protocol. The method further includes ascertaining whether to handoff from one frequency member to another frequency member and can further include seamlessly handing off to the other frequency member.

Description

"TRANSPARENT INTER-FREQUENCY TRANSFER IN WIRELESS COMMUNICATIONS NETWORKS" FIELD OF THE INVENTION The following description refers in general terms to wireless communications, and among other things, to a transparent inter-frequency transfer in wireless communications networks.

BACKGROUND OF THE INVENTION Wireless network systems have become a prevalent medium through which a large number of people communicate worldwide. Wireless communication devices have become smaller and more powerful in order to meet customer needs, which include greater portability and convenience. Users have discovered many uses for wireless communications devices, such as cell phones, personal digital assistants (PDAs) and the like, and demand reliable service as well as expanded coverage areas. In order to carry out continuous coverage for mobile stations, access points (base stations, access networks, etc.) associated with cellular networks are placed geographically so that users who change their location do not lose services. Consequently, the mobile stations can be "transmitted" from a first base station to a second base station. In other words, a mobile station will be served by a first base station while it is in a geographic region associated with such a base station. When the mobile station is transported to a region associated with a second base station, the mobile station will be transmitted from the first base station to the second base station. Ideally, the transfer occurs without loss of data, loss of service, and the like. Conventionally, this transfer occurred through a significant amount of messages between the mobile stations and the base stations. For example, as a mobile station was transported to a base station, various messages were sent between the mobile station and the base station, as well as between the base station and a base station currently serving the mobile station. These messages allow the allocation of reverse link forward link channels between the mobile station and the base stations. To allow a transfer to occur rapidly and without loss of a substantial amount of data, a set of base stations may be stopped in order to provide services to the mobile station. This set of base stations can be updated as the geographic region associated with the mobile station is altered. In more detail, the mobile station can be adapted to monitor communications or receive communications by a first frequency from a first base station. A second base station can communicate with the mobile station through the same frequency, and the second base station can be added to the set or base stations if particular performance parameters are met. Once the base station is added to the set, it is ready to serve the mobile station once it enters a particular geographic range of such a base station. The transfer between base stations occurs in a timely manner without loss of significant amounts of data. Transfer to another sector that operates on the same frequency is common and can be done using existing techniques. However, the transfer of frequencies between sectors, or inter-frequency, is typically achieved using a hard transfer in which the probability of data loss and loss of connection is greater. The inter-frequency transfer includes the transfer between systems of the same technology but through different frequencies. The implementation of a network requires inter-frequency transfer for various commercial reasons, such as spectrum availability and frequency reuse factor. In such an implementation, there is a need for a transparent inter-frequency transfer. Therefore, in order to address the above, there is a need for techniques that facilitate transparent inter-frequency transfers to improve communications and efficiency in wireless network systems.

BRIEF DESCRIPTION OF THE INVENTION The following presents a simplified summary of one or more modalities in order to provide a basic understanding of some aspects of such modalities. This summary is not an extensive overview of one or more modalities, and does not pretend to identify key or critical elements of the modalities nor delineate the scope of such modalities. Its sole purpose is to present some concepts of the modalities described in simplified form as a prelude to the more detailed description that is presented later. According to one or more embodiments and the corresponding description thereof, various aspects are described in connection with the transparent inter-frequency transfer in a wireless network. According to one embodiment, a method includes reporting to an access network the resistance information of the sector pilot for at least one frequency member in a message specified in an active set management protocol. Information concerning at least one other frequency member is received in a message specified in the active set administration protocol. The method further includes determining whether it is necessary to perform the transfer from one frequency member to another frequency member. Both frequency members are included in an active set. The method may also include transparent transfer to the other frequency member. According to another embodiment, there is a wireless communication device that includes a processor and a memory coupled to the processor. The processor may be configured to select a frequency member in order to transmit a user device based in part on a radio channel condition with the current service sector and the resistance of the pilot for other frequency sectors. In other embodiments, the processor may be coupled with a frequency optimizer that optimizes communication based on a determination of when to facilitate an inter-frequency transfer. According to yet another embodiment, there is an apparatus for transparent inter-frequency transfer in a wireless communication environment. The apparatus may include a means for providing location information of a mobile device and a means for reporting a channel quality indicator to at least one sector. A means can also be included to report other resistance of the pilot or frequency sector in a PilotReport message and a means to transparently perform an inter-frequency transfer, between at least sectors included in an active set. According to another modality, there is a computer-readable medium that has computer executable instructions stored in it. The instructions may include receiving a SystemParameter message from a first access network having a first frequency pilot and calculating a time to measure a second frequency pilot from a second access network. The instructions may also include the sending of a RequestUpdateAttribute (AttributeUpdateRequest) message, which receives a message of AcceptanceUpdateAttribute (AttributeUpdateAccept). A tuning will be enabled and a determination is made to start a measurement of the second frequency pilot. In addition, the instructions may include the measurement of the second frequency pilot and the sending of a Pilot Report message for the second frequency pilot. According to a further embodiment, there is a processor that executes instructions for transparent inter-frequency transfer in a wireless communication environment. The instructions may include reporting a channel quality indicator to at least one sector. The instructions may include reporting a channel quality indicator to at least one sector and reporting another resistance of the frequency sector pilot in a Pilot Report message. The instructions can also provide the inter-frequency execution. According to another modality, a method for transparent inter-frequency transfer is found. The method includes receiving a request for a tuning period from an access terminal and sending a permission message to the access terminal for tuning. The method further includes receiving, from an access terminal, a sector pilot resistance information for at least one frequency member in a specified message in an active set management protocol; and sending information about at least one other frequency member in a message specified in the active set administration protocol. In addition, the method includes allowing the access terminal transparent transfer to at least one other frequency member. According to a further embodiment, there is an access network that provides inter-frequency transfer in a wireless communication system. The network includes a receiver that receives a tuning request from a mobile device and a transmitter that sends an ActiveSetAssignment message that notifies the mobile device that at least two access networks are included in an active set. The transmitter may also request at least one second access network that responds with resources that the second access network for the mobile device has available. The receiver can also receive information on resources from at least one second access network. For the implementation of the above and other related objectives, one or more embodiments comprise the features specifically described hereinafter and particularly pointed out in the claims. The following description and annexed drawings set forth in detail show illustrative aspects of one or more modalities. However, these aspects are indicative of a few different ways in which the principles of various modalities can be used and it is intended that the described modalities include such aspects and their equivalents.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 illustrates a wireless communications system 100 according to various embodiments set forth herein. Figure 2 illustrates functional blocks used with various modalities set forth herein. Figure 3 illustrates the synchronization or programming of the tuning in a time division duplexing system (TDD-time division duplexing) according to various modalities. Figure 4 illustrates synchronization or programming of tuning in a frequency division duplexing (FDD) system according to various modalities. Figure 5 illustrates a methodology for determining an inter-frequency transfer to an access network according to various modalities. Figure 6 illustrates a methodology for performing an inter-frequency transfer in a wireless communication environment in accordance with various modalities set forth herein. Figure 7 illustrates a graphic representation of an inter-frequency transfer message. Figure 8 illustrates a system using inter-frequency transfer in a wireless communication environment in accordance with one or more modalities set forth herein. Figure 9 illustrates a system that uses inter-frequency transfer techniques to increase the capacity of the system in a wireless communication environment in accordance with various modalities. Figure 10 is an illustration of an access point system.

DETAILED DESCRIPTION OF THE INVENTION Various modalities are described below with reference to the drawings. In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a full understanding of one or more modalities. However, it can be evident that such modality (s) can be put into practice without these specific details. In other cases, well-known structures and devices are shown in the block diagram in order to facilitate the description of these modalities. As used in this application, the terms "component", "system", and the like are intended to refer to a computer-related entity, be it hardware, firmware, a combination of hardware and software, software, or running software. For example, a component can be, but not be limited to, a process that runs on a processor, a processor, an object, an executable, a thread of execution, a program and / or a computer. By way of illustration, both an application running on a computing device and the computing device can be a component. One or more components can reside in a process and / or thread of execution and a component can be located in a computer and / or distributed between two or more computers. In addition, these components can be executed from various computer readable media having various data structures stored therein. The components can communicate in the manner of local and / or remote processes such as those that operate in accordance with a signal having one or more data packets. { for example, data from a component that interacts with another component in a local system, distributed system, and / or through a network such as the Internet with other systems as a signal). In addition, various embodiments in connection with a user device are described herein. The user devices are also known as system, subscriber unit, subscriber station, mobile station, mobile device, remote station, access point, base station, remote device, access terminal, user terminal, terminal, user agent or equipment of user. A user device can be a cell phone, a cordless telephone, a SIP phone (Session Initiation Protocol), a wireless local loop (WLL) station, a PDA, a portable device that has wireless connection capability, and other processing device (s) connected to a wireless modem . In addition, various aspects or features described herein may be implemented as a method, apparatus or article of manufacture using conventional programming and / or design techniques. The term "article of manufacture" as used herein refers to encompassing a computer program accessible from any computer, vehicle or media readable device. For example, computer readable media may include but are not limited to magnetic storage devices. { for example, hard disk, flexible disk, magnetic strips ...), optical discs. { for example, compact disk (CD - compact disk), digital versatile disk (DVD - digital versatile disk), smart cards and flash memory devices. { for example, card, memory stick, removable memory unit, ...). Referring now to the drawings, the Figure 1 illustrates a wireless communication system 100 according to various embodiments set forth herein. The system 100 may comprise one or more access point (s) or base stations 102 that receive, transmit, repeat, etc. wireless communication signals one to the other and / or to one or more mobile devices 104. The access point (s) 102 may (n) represent an interface between the wireless system 100 and a network Wired (not shown). Each access point 102 may comprise a transmitting chain and a receiving chain, each of which in turn comprises a plurality of components associated with transmission and reception. { for example, processors, modulators, multiplexers, demodulators, demultiplexers, antennas, ...). Mobile devices 104 can be, for example, cell phones, smart phones, laptops, portable communication devices, portable computing devices, satellite radios, global positioning systems, PDAs, and / or other suitable devices to communicate in the system. wireless 100. In the wireless system 100, the periodic transmission of small data packets (commonly referred to as headlights) from the access point 102 may disclose the presence of the wireless system 100 and the information of the transmission system 100. The devices mobiles 104 can detect the headlights and attempt to establish a wireless connection with the access points 102 and / or with other mobile devices 104. The system 100 facilitates the transparent transition through various networks and / or protocols operating in different sectors and / or at different frequencies in order to provide the user who makes a of the mobile device 104 the ability to take advantage of the various networks and protocols. The system 100 also automatically provides the user with the opportunity to use the best access point or sector either internal or external to the network operating on the same frequency or a different one given the current location of the user, and / or a resistance of the sector pilot reported. The user can take advantage of the various sectors regardless of whether the mobile device 104 is in idle mode (idle session) or in connected mode (active session). Idle mode refers to times when there is no user service but mobile device 104 is monitoring location channels and t channels of complementary information. During idle mode, the receiver (mobile device) is available for downlink measurements. There may also be an unscheduled reselection of new access networks and / or new technology during idle mode. Before entering inactive mode. { for example, on power up), the mobile device 104 must perform the System Selection to determine the best or most optimal system available for the service. While in idle mode, the mobile device must continually examine the neighboring access networks. After the determination of a "better" access network, the mobile device 104 can make the transition in the new access network. The connected mode refers to an active user service. { for example, a call, active data connection). During this mode, it may be possible to transfer the device to new technologies and / or frequencies. There may be limited receiver availability for measurements during this time because the user service has priority. A component in the mobile device 104 can monitor and / or detect one or more channel conditions that operate on one or more frequencies. Since a channel condition remains at or above a predetermined threshold or channel quality, the mobile device 104 does not switch the channels. However, if the quality of the channel. { for example, noise ratio per signal) falls below the predetermined threshold level, there is a shutdown for a different channel. In some embodiments, a component located in the mobile device 104 may operate in conjunction with one or more access points 102 in order to facilitate the determination of a location of the mobile device 104 in each network and may be facilitated through various location techniques. . The location information can be used to predict which user is most suitable for having a transparent transfer to a secondary network operating on the same frequency or on a different frequency than currently used by the mobile device 104. For example, a user can move quickly through the city in a car. There can be communication with various access points with which the mobile device 104 can operate at different frequencies. The mobile device 104 can transparently switch from one frequency to another, etc. , as the user approaches a specific access point. The network to which the mobile device switches may be a function of the location of the user and / or the resistance of the detected frequency. The transfer can be an intra-frequency transfer and / or an inter-frequency transfer. However, it should be understood that the use of the location of the mobile device 104 to determine a transfer is optional and does not have to be used in accordance with various techniques described herein. Figure 2 illustrates the functional blocks used with various modalities set forth herein. These functional blocks represent functions implemented by a processor, software or a combination thereof. { for example, firmware). A locator 202, a channel quality indicator (CQI) notifier 204, a frequency recorder 106 and a transfer mechanism 208 are illustrated. It should be understood that more or fewer functional blocks could be used with the described modes. For example, two or more functional blocks may be combined or a functional block may be separated into two or more functional blocks. A combination of these approaches can also be used. An optional locator 202 can be configured to provide information regarding the location of a mobile device. The location information can be provided, for example, by Global Positioning System or other location determination mechanisms, such as an active set management protocol by default. The active set management protocol can provide procedures and messages that are used by an access terminal and an access point to monitor or track the approximate location of the terminal. The Active Set can also be used to maintain a radio link as the access terminal moves between the coverage areas of different sectors. The active set is defined as a set of pilots of sectors with MACID assigned to an access terminal. The active set is a set of sectors that has knowledge about a mobile device and allocates some resources to provide its service. Active set members can be synchronous or asynchronous with respect to each other. The access terminal can switch its service sector at any time between these active set member sectors. A synchronous subset of an active set consists of sectors that are synchronous with one another. In addition, the subset is a maximum subset, for example, all sectors that are synchronous with the sectors in this subset are included in the subset. The different ASSINC synchronous subsets can be interpreted using the last instance of an AssignationActiveActive message. The transmission from the access terminal to two different synchronous subsets of the active set is independent of each other. For example, the CQI 204 Notifier can be configured to notify or report a CQI to a synchronous subset of sectors independent of some other synchronous subset. In order to facilitate a transparent inter-frequency transfer, the concept of an active set extends to include members from two or more frequencies. Consequently, the active set can include members from two or more frequencies, thus minimizing the amount of time necessary for the transfer between these two or more frequencies. The sectors coming from the different frequencies can be synchronous or asynchronous with respect to each other. In order to facilitate the addition of another frequency sector to the active set, the frequency register 206 may be configured to report another resistance of the frequency sector pilot in a message specified in the active set administration protocol. The frequency recorder 206 can be further configured to measure the other resistance of the frequency sector pilot. There are several ways to report the resistance of the pilot. While in idle mode, a receiver is available to perform frequency measurements (assuming an interval operation in idle mode). To report the resistance of the pilot in connected mode, dual receivers 208 or a temporary tuning mechanism 210 are used. Tuning is a mechanism to measure other frequencies of the system by withdrawing time from a service. In some embodiments, two or more reception means are available. A receiving means may be used to continue or establish a communication on a radio link while the other receiving means performs various functions in order to establish and execute the inter-frequency transfer. Still, in other embodiments, dual receivers are not available, so the tuning mechanism 208 is provided, which will be described below with reference to Figures 3 and 4.

The inter-frequency transfer mechanism 212 can be configured to facilitate transparent transfers that do not interrupt a radio link. Various parameters can be monitored to ensure that a particular transfer will not interrupt a radio link. These parameters may include but not be limited to the location of a user device and / or the location of one or more access networks to which the mobile device may transfer. If it is anticipated that a particular transfer will interrupt the radio link, the inter-frequency transfer will not be allowed, thereby maintaining the integrity of the system 200. In the following detailed description, various aspects and modalities can be described in the context of the systems time division duplexing (TDD) or frequency division duplexing (FDD) systems. Although these inventive aspects may be well suited for use with the described embodiments, those skilled in the art will readily understand that these inventive aspects are equally applicable for use in various other systems. In accordance with the above, it is intended that any reference to TDD and / or FDD illustrates only the inventive aspects, with the understanding that such inventive aspects have a wide range of applications. Figure 3 illustrates synchronization or programming 300 of the tuning in a time division duplexing (TDD) system according to various modalities. The tuning mechanism 208 (as illustrated in Figure 2) includes a tuning program and a tuning control. The Tuning ProgramN attribute provides a means to communicate the tuning program (s) between an access terminal and an access point. The synchronization for an access network 302 is illustrated at the top of the figure and the synchronization for the access terminal 304 is illustrated at the bottom. Access network 302 includes a plurality of forward link PHY frames of which frames 0, 1, ... 11, 12 and 13 are illustrated. Similarly, the access terminal includes a plurality of PHY frames of reverse link of which the frames 0, 1, ..., 11, 12 and 13 are illustrated. It should be understood that this synchronization is continuous and that it can be of an indefinite nature. Program 300 assumes that the first tuning occurred during the SuperTrama defined by SuperTrama Number, illustrated as 306, provided in the TuningN Program. In addition, more refined tuning time is SuperStandard Compensation (StartSuperFrameOffset) 308, which is defined in microseconds (μs) from the start of the previously identified SuperTrama. The Tuning Duration (TuneAwayDuration) 310 is the duration, in microseconds, of tuning of the access terminal 304. The Tuning Periodicity (TuneAwayPeriodicty) 312 determines the time between the start of a successive tuning in units of microseconds. The access terminal 304 can negotiate one or more synchronization programs. It should be understood that more than one program may be required to monitor the pages of a system, for example, and to tune the inter-frequency transfer. If a tuning period causes the access terminal 304 to skip the InfoSystem block (Systemlnfo), the access terminal must maintain the tuning for the entire period of validity of the InfoSystem block. The validity period from approximately two Superframes. If the tuning starts at some point different from the beginning of the particular plot. { for example, near the beginning, middle, near the end, or anywhere between them), as indicated 314, both the access network and the access terminal interpret this as the beginning of the PHY frame, such as the beginning of frame 316, for example. Similarly, if the tuning ends somewhere in the frame, the tuning ends at the end of that frame.

It should be noted that each sector can have a notion of mobile broadband wireless access time (MBWA -Mobile Broadband Wireless Access) that starts with a first transmitted Superframe. Based on this notion, a program can be created by the access terminal and a frame boundary occurs just before tuning can take place (for example, a position in time corresponding to the frame boundary). Figure 4 illustrates synchronization or programming 400 of the tuning in a frequency division duplexing (FDD) system according to various modalities. The program for an access network 402 is represented graphically in the upper part of the figure and the program for the access terminal 404 is graphically represented in the lower part of the figure. Access network 402 includes a plurality of forward link PHY frames of which frames 0, 1, 2, 3, ..., 22, 23, 24, 25, 26, and 27 are illustrated. Similarly , the access terminal includes a plurality of reverse link PHY frames of which the frames 0, 1, 2, 3, ..., 22, 23, 24, 25, 26 and 27 are illustrated. It should be understood that this synchronization It is continuous and may be indefinite in nature. A SuperTrailNumber (StartSuperFrameNumber) 406 is used to calculate the tuning cycles. A basic assumption is made of the first tuning that occurred during SuperTrackNumber 406. A SuperTrackNumber 408 Compensation field is measured in units. of microseconds. To calculate the tuning cycles, it must be assumed that the first tuning begins in time SuperTrainComm 408, after the start of the SuperTrax Number SuperTrackNumber 406. The duration of a tuning in units of microseconds is determined by the Synchronization Duration field 410. To determine the time between the start of the successive tunings in units of microseconds, a field PeriodicidadSintonicidad (TuneAwayPeriodicity) 412 is used. If a duration falls in a physical frame of forward link 0, both the access network 402 and the access terminal 404 will expire before the reverse link assignment. As illustrated, the reverse link PHY frame 0 must begin before the forward link PHY frame 0. Methodologies referring to the inter-frequency transfer are illustrated. Although, for purposes of simplicity of explanation, the methodologies are shown and described as a series of acts, it must be understood and appreciated that the methodologies are not limited by the order of the acts, given that some acts can, according to the subject claimed in question, occur in different orders and / or concurrently with other acts with respect to or those shown and described herein. For example, those skilled in the art will understand and appreciate that a methodology could alternatively be represented as a series of interrelated states or events, such as in a state diagram. In addition, not all illustrated acts can be used to implement a methodology according to one or more modalities. Figure 5 illustrates a technology 500 for communicating an inter-frequency transfer message. The method 500 starts, at 502, where a system parameter message is received from a first access network having a first frequency pilot. The System Parameter can include a neighboring list of frequencies for the access networks in the same wireless system or in others. At 504, the time is calculated to measure a frequency pilot for the other access network (s), which could have a different frequency than the first access network. This calculated time can be used to control a tuning period, if necessary. A message is sent RequestUpdateAttribute, in 506, which is an attribute of tuning. If this request is accepted, AcceptanceUpdateAttribute is received, in 508 and tuning is enabled. The tuning may include discontinuous monitoring of the forward link control channels associated with an access point and / or discontinuous communications to an access point through a reverse link. In some modalities, it is required to use double receiver functionality to report the resistance information of the sector pilot. A receiver can be used for communication purposes and a second receiver can be used to measure the resistance of the pilot or sector. Figure 6 illustrates a methodology 600 for determining an inter-frequency transfer according to various modalities. Method 600 starts at 602 when an access terminal enables a tuning period by using, for example, the method described with reference to Figure 5. Tuning is enabled by a request by the access terminal to the access point. Since the access point responds with an acceptance, the access terminal can tune. The method continues, at 604, where a determination is made whether measurements are initiated or not. If the determination, at 604, is "no", method 600 continues at 606 where the monitoring of the potential access networks to which the transfer is going to be carried out is carried out continuously or periodically. If the determination at 604 is "yes", the method 600 continues at 608. The mobile device tunes to at least one second access network having the same frequency or a different frequency and a measurement of the pilots is made in the neighboring list for the second access network, during tuning. After performing the measurement, the mobile device can re-tune the first access network and, at 610, a Pilot Report message can be sent to the first access network. Sending the Pilot Report message optionally happens if the threshold is reached by a measured pilot. The method continues 612 where an active set allocation message is sent. This message can be sent if the access network decides that the pilot should be added and / or removed from the active set. Once the pilot is in the active set, the access terminal can switch between any active set pilot, at 614. The transfer can now take place and the access terminal can switch between the pilots seen as the pilot is a member of the active set. The access terminal could make the transfer if the resistance of the pilot of the current service factor falls below a certain threshold and / or pilot resistance of another frequency sector exceeds a certain threshold. Various mechanisms can be used to report the resistance information of the pilot. For example, the mobile device may have dual receivers (or more than two receivers). A receiver can be used to continue communicating the information through a radio link while the other receiver is used to report the pilot's resistance information. In other embodiments, a mobile device may have only one receiver and a tuning protocol is used. The tuning protocol causes the mobile device not to send or receive communication for a specific time that has a predetermined duration. During this tuning period, the receiver can measure the resistance information of the pilot and then return to a communication mode without interruption of such communication or radio link. This temporal tuning can be performed substantially at the same time that the mobile device is in a connected or active mode. Figure 7 illustrates a graphic representation 700 of an inter-frequency transfer message. The flow of messages between an access terminal (AT-access terminal) 702, an access network having a first frequency (AN-access network (Fl)) 704 is illustrated., an access network having a second frequency (AN (F2)) 706. The timeline is shown at 708 and illustrated from a time "a" to time "n". During time "a", a System Parameter 710 message is sent from the AN (F1) 704 to the access terminal 702. The System Parameter 710 message may include another neighbor list of frequencies. At time "b", access terminal 702 calculates the time needed to measure the other frequency pilot. The access terminal 702 sends the AN (F1) 704 a RequestUpdateAttribute 712 which may include a Tuning Attribute, during the time "c". Given that the RequestUpdateAttribute is accepted, during the time "d" an AcceptUpdateAttribute 714 message is transmitted. The access terminal 702 decides whether or not the measurements are started during the "e" time period. If the measurements are to start, during the time "f", a Request Tune (TuneAwayRequest) 716 message is transmitted to the AN (F1) 704. The AN (F1) 704 sends a TuneAwayResponse message to the terminal Access 702. The start of the next tuning period occurs at time "g". At this time, forward link / reverse link assignments expire. During the next time period "h", the access terminal 702 tunes in the AN (F2), in 718, and measures its pilots. During the next period of time "i", the access terminal 702 returns to tuning in AN (F1) 704 and continues to use the sector in service. If the pilots measured with use a threshold, a Pilot Report message 720 is sent during time "j" which may include other frequency pilots. In 722, the AN (F1) 704 and the AN (F2) communicate to request and / or respond regarding the resources available for the access terminal 702. If the access network decides to add the other AN frequency sector ( F2) 706 to the active set based on the pilot report, it is then sent in step "k", the active set allocation message 724 to the access terminal 702 which includes the pilot for the AN (F2) 706. The AN (F2) 706 is added to the active set. At this point, the access network of the AN (F2) 706 is part of the active set for the access terminal 702. Initially, at the time "a", the AN (F1) 704 was the only network included in the set active, so that after time "k" there are then two access networks in the active set. Access terminal 702 can now switch between AN (F1) 704 and AN (F2) 706, and any other network included in the active set. The access terminal may decide whether to switch based on a pilot measurement or other measurements indicating that a different network would provide optimal channel conditions. With the AN (F2) 706 that is in the active set, the access terminal 702 can decide whether to perform an inter-frequency transfer to the AN (F2) 706. If the access terminal 702 decides to perform the transfer, in 726, contact the AN (F2) with a brief access to acquire synchronization information from the AN (F2) 706. This occurs during the "m" time. During time "n", access terminal 702 and AN (F2) 706 communicate and access terminal 702 receives services from AN (F2) 706, until another inter-frequency transfer occurs with a network of access included in the active set. Other access networks to the active set are added and the mobile device 702 can transfer to those networks in a manner substantially similar to that described above. Figure 8 illustrates a system 800 that utilizes a transfer of interest and a frequency in a wireless communication environment in accordance with one or more embodiments disclosed herein. The system 800 can receive in a base station and / or in a user device, as will be observed by the person skilled in the art. The system 800 includes a receiver 802 that receives a signal from, for example, of one or more reception antennas, and performs typical actions in it (eg empl o, filters, amplifies, subverts, ...) the received signal and digitizes the conditioned signal to obtain samples. A demodulator 804 can modulate and provide the symbols of the received pilot to a processor 806 for the channel calculation. The processor 806 may be a processor dedicated to analyzing the information received by the receiver 802 and / or for generating information for transmission made by a transmitter 814. The processor 806 may be a processor that controls one or more components of the user device 800. , and / or a processor that analyzes the information received by the receiver 802, generates information for the transmission made by a transmitter 814, and controls one or more components of the user device 800. The user device 800 may include a frequency optimizer 808 that coordinates the transfer and inter-frequency assignments. The frequency optimizer 808 can be incorporated into the processor 806. It should be noted that the frequency optimizer 808 can include the optimization code that the utility performs based on the analysis in connection with the assignment of user devices to different frequency sectors. The optimization code can use artificial intelligence based on methods related to the implementation of probabilistic determinations and / or inference and / or statistical determinations in connection with the optimization of the inter-frequency transfers of the user device. The user device 800 may additionally comprise the memory 810 which is operatively coupled to the processor 806 and which stores information related to the frequency and / or resistance information of the sector pilot, look-up tables comprising related information, and other suitable information related to the inter-frequency transfer as described herein. The memory 810 can additionally store protocols associated with the generation of look-up tables, etc. , so that the user device 800 can employ stored protocols and / or algorithms to increase the capacity of the system. It will be noted that the data storage components (eg, memories) described herein may be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. By way of illustration and not limitation, non-volatile memory may include read-only memory (ROM), programmable ROM (ROM), programmable ROM (EPROM), electrically erasable ROM (EEPROM). - electrically erasable PROM), or flash memory. Volatile memory can include random access memory (RAM), which acts as an external associated memory. By way of illustration and not limitation, RAM is available in many forms such as synchronous RAM (SRAM - synchronous RAM), dynamic RAM (DRAM - dynamic RAM), synchronous DRAM (SDRAM - synchronous DRAM), dual speed SDRAM data (DDR DRAM - double data rate SDRAM), enhanced SDRAM (ESDRAM -enhanced SDRAM), DRAM Synchlink (SLDRAM) and direct Rambus RAM (DRRAM). The memory 810 of the systems and methods in question is intended to include, but not be limited to, these and other suitable types of memory. The processor 806 is connected to a symbol modulator 812 and to the transmitter 814 that transmits the modulated signal. Figure 9 illustrates a system that uses inter-frequency transfer techniques to increase the capacity of the system in a wireless communication environment in accordance with the various modalities. The system 900 comprises a base station 902 with a receiver 910 that receives the signal (s) originating from one or more user devices 904 through one or more receiving antennas 906, and transmits to one or more. more user devices 904 through a plurality of transmit antennas 908. In one or more modes, the reception antennas 906 and the transmission antennas 908 can be implemented using a single set of antennas. The receiver 910 can receive information from the reception antennas 906 and is operatively associated with a demodulator 912 that demodulates the received information. Receiver 910 can be, for example, a rake receiver (eg, a technique that individually processes multi-path signal components using a plurality of baseband correlators, ...), MMSE-based receiver, or some other suitable receiver to separate the user devices assigned to it, as those skilled in the art will observe. According to various aspects, multiple receivers (eg, one per receive antenna) can be employed, and such receivers can communicate with each other to provide improved calculations of the user data. The demodulated symbols are analyzed by a processor 914 that is similar to the processor described above with reference to Figure 8, which is coupled to a memory 916 that stores information related to the assignments of the user device, query tables related thereto. and the similar. The receiver output for each antenna can be processed jointly by the receiver 910 and / or the processor 914. A modulator 918 can multiplex the signal for the transmission made by a transmitter 920 through the transmission antennas 908 to the devices user 904. Base station 902 further comprises a dispatcher 922, which may be a processor other than or integral to processor 914, and which may evaluate a group of all user devices in a sector served by base station 904 and you can assign user devices to particular frequency sectors based at least in part on the location of the individual user devices, frequency transfer scheme, or the like. As seen in Figure 10, a radio access point may comprise a main unit (MU -main unit) 1050 and a radio unit (RU-radio unit) 1075. The MU 1050 includes the digital baseband components of an access point. For example, the MU 1050 may include a baseband component 1005 and an intermediate intermediate frequency (IF) processing unit 1100. The digital IF processing unit 1000 digitally processes the radio channel data at an intermediate frequency by executing functions such as filtering, channeling, modulation, and so on. RU 1075 includes the analog radio parts of the access point. As used herein, a radio unit is the analogous radio parts of an access point or other type of receiving station with direct or indirect connection to a mobile switching center or corresponding device. Typically, a radio unit serves a particular sector in a communications system. For example, the RU 1075 may include one or more receivers 1030 connected to one or more antennas 1035 a-t to receive radio communications from the mobile subscriber units. In one aspect, one or more power amplifiers 1082 a-t are coupled to one or more antennas 1035 a-t. Connected to the receiver 1030 is an analog-to-digital (A / D) converter 1025. The analog-to-digital (A / D) converter 1025 converts the analog radio communications received by the receiver 1030 to a digital input for transmission to the component. baseband 1005 by the digital IF 1010 processing unit. The RU 1075 may also include one or more transmitters 1020 connected to the same antenna or to a different one 1035 to transmit radio communications to the access terminals. Connected to the transmitter 1020 is a digital to analog (D / A) converter 1015. The digital to analog (D / A) converter 1015 converts the received digital communications from the baseband component 1005 by the digital IF processing unit 1010 in an analogous output for transmission to the mobile subscriber units. In some modalities, a multiplexer 1084 for multiplexing multiple channel signals and multiplexing a variety of signals including a voice signal and a data signal. A central processor 1080 is coupled to the Main Unit 1050 and the radio unit to control various processing including the processing of voice or data signals. It should be understood that the embodiments described herein may be implemented for hardware, software, firmware, middleware, microcode or any combination thereof. For a hardware implementation, the processing units in an access point or an access terminal to be implemented in one or more specific application integrated circuits (ASICs - application specific integrated circuits), digital signal processors (DSPs - digital signal processors) ), digital signal processing devices (DSPDs), programmable logic devices (PLDs), programmable field gate arrays (FPGAs), processors, controllers, microcontrollers, microprocessors , other electronic units designed to perform the functions described herein, or a combination thereof. When the modalities are implemented in software, firmware, middleware or microcode, program code or code segments, they can be stored in a machine-readable medium, such as a storage component. A code segment can represent a procedure, a function, a subprogram, a program, a routine, a subroutine, a module, a software package, a class or any combination of instructions, data structures or program statements. A code segment can be coupled to another code segment or a hardware circuit by passing and / or receiving information, data, arguments, parameters or memory content. The information, arguments, parameters, data, etc. , can be passed, sent in advance, or transmitted using any suitable means that include memory sharing, message passes, card passes, network transmission, etc. For a software implementation, the techniques described herein may be implemented with modules (e.g., procedures, functions, etc.) that perform the functions described herein. Software codes can be stored in memory units and executed by processors. The memory unit may be implemented within the processor or external to the processor, in which case it may be communicatively coupled to the processor through various means as is known in the art. What has been described above includes examples of one or more modalities to enable the person skilled in the art to make or use the features, functions, operations and modalities described herein. Of course, it is not possible to describe every conceivable combination of components or methodologies for purposes of describing the aforementioned modalities, but the person skilled in the art will recognize that many additional combinations and permutations of various modalities are possible. In accordance with the foregoing, the described modalities are intended to include all those alterations, modifications and variations that are within the spirit and scope of the appended claims. In addition, the term "includes" is used in the detailed description or in the claims, such that the term is intended to be inclusive in a manner similar to the term "comprising" given "comprising" is interpreted when used as a word of transition in a claim.

Claims (23)

1. NOVELTY OF THE INVENTION Having described the invention as antecedent, the content of the following claims is claimed as property
2. CLAIMS 1. A method for transparent inter-frequency transfer in a wireless network, characterized in that it comprises: reporting to an access network the resistance information of the sector pilot during at least one frequency member in a message specified in a protocol active set administration; receive information about at least one other frequency member in a message specified in the active set administration protocol; determining whether it is necessary to perform the transfer from at least one frequency member to at least one other frequency member, where both frequency members are included in the active set; and transparently transfer at least one other frequency member. The method according to claim 1, further characterized in that it comprises transferring at least one other frequency member when a channel quality level falls below a predetermined threshold.
3. 3. The method according to claim 1, characterized in that reporting the resistance information of the sector pilot for at least one frequency member, further comprises determining a time to initiate a temporal tuning.
4. The method according to claim 3, characterized in that the tuning comprises the discontinuous monitoring of the forward link channels associated with the access network.
5. The method according to claim 3, characterized in that the tuning comprises discontinuous communications to the access network through a reverse link.
6. The method according to claim 1, characterized in that it reports the resistance information of the sector pilot for at least one frequency member, further comprises using a receiver for communication and a second receiver for reporting the resistance of the sector pilot .
7. The method according to claim 1, characterized in that the message specified in an active set management protocol for reporting the resistance information of the sector pilot is a Pilot Report message.
8. 8. The method according to claim 1, characterized in that the message specified in the active set administration protocol to receive at least one specified frequency member is an ActiveAssignmentAssignment message. The method according to claim 1, characterized in that transparently transferring at least one frequency member is during an inactive session. The method according to claim 1, characterized in that transparent transfer at least to a frequency member is during an active session. The method according to claim 1, characterized in that an inter-frequency transfer from at least one frequency member to at least one other frequency member is performed if an uninterrupted radio link exists. The method according to claim 1, characterized in that an inter-frequency transfer from at least one frequency member to at least one other frequency member is not performed if an interruption occurs in a radio link. A wireless communication device, characterized in that it comprises: a processor configured to select a frequency member included in an active set in order to transfer a wireless device based in part on a radio channel condition; and a memory coupled to the processor. The wireless communication device according to claim 13, characterized in that the processor is coupled to a frequency optimizer that optimizes a communication based on a determination on when to facilitate an inter-frequency transfer. 15. The wireless communication device according to claim 13, further characterized in that the processor is configured to determine a tuning period in order to measure and report the resistance of the frequency receiver pilot for the access networks with which the wireless device can interface. The wireless communication device according to claim 13, further characterized in that the processor is configured to determine an approximate location of the wireless device. The wireless communication device according to claim 13, further characterized in that it comprises a first receiver for facilitating a communication and at least a second receiver for reporting the resistance of the pilot while the wireless device is in a connected mode. 18. An apparatus for transparent inter-frequency transfer in a wireless communication environment, characterized in that it comprises: a means for reporting a channel quality indicator to at least one sector; a means to report another resistance of the frequency sector pilot in a message of

   Pilot Report; and a means for transparently performing an inter-frequency transfer between at least the sectors included in an active set. The apparatus according to claim 18, characterized in that the means for reporting another resistance of the frequency sector pilot in a Pilot Report message further comprises a means of temporarily tuning while in connected mode. The apparatus according to claim 18, characterized in that the means for reporting the resistance of the frequency sector pilot in a Pilot Report message further comprises at least two for receiving messages during a connected mode. The apparatus according to claim 18, characterized in that the means for reporting another resistance of the frequency sector pilot in a Pilot Report message also responds to a message Sectors Parameters specified in a complementary information message protocol. 22. The apparatus according to claim 18, characterized in that the means for transparently performing an inter-frequency transfer receives an Active Assignment Assignment message specified in an active set management protocol. 23. A computer readable medium that has stored in the same instructions executable by computer to: receive a message ParameterSystem coming from a first access network that has a first frequency pilot; calculate a time to measure a second frequency pilot of a second access network; send a message RequestUpdateAttribute; receive a message

   RequestUpdateAttribute; enable a tuning; determine if a measurement of the second frequency pilot is initiated; measure the second frequency pilot; and send a Pilot Report message for the second frequency pilot. 2 . The computer-readable medium according to claim 23, further characterized in that it comprises instructions so that after measuring the other frequency pilot, it returns to the first access network. 25. The computer-readable medium according to claim 23, characterized in that before measuring the second frequency pilot further comprises the transmission of a Control Tuning message. 26. A processor that executes instructions for transparent inter-frequency transfer in a wireless communication environment, characterized in that the instructions comprise: reporting a channel quality indicator to at least one sector; report another resistance of the frequency sector pilot in a Pilot Report; and transparently perform an inter-frequency transfer. The processor according to claim 26, characterized in that the instructions further comprise reporting another resistance of the frequency sector pilot in a Pilot Report, further comprising a temporal tuning while in connected mode. The processor according to claim 26, characterized in that reporting another resistance of the frequency sector pilot in a Pilot Report message further comprises at least two means for receiving messages during a connected mode. The processor according to claim 26, characterized in that reporting another resistance of the frequency sector pilot in a Pilot Report message also responds to a message ParametersSector specified in a complementary information message protocol. The processor according to claim 26, characterized in that performing an inter-frequency transfer in a transparent manner also receives an Active Assignment Assignment message specified in an active set administration protocol. 31. A method for a transparent inter-frequency transfer, characterized in that it comprises: receiving a request for a tuning period from an access terminal; send a permission message to the access terminal for tuning;

   receiving resistance information from the sector pilot from an access terminal for at least one frequency member in a message specified in an active set management protocol; and sending information about at least one other frequency member in a message specified in the active set administration protocol; allow the access terminal a transparent transfer to at least one other frequency member. 32. The method according to claim 31, characterized in that the tuning comprises a discontinuous communication with the access terminal through a forward link. The method according to claim 31, characterized in that the tuning comprises discontinuous monitoring of a reverse link channel associated with the access terminal. 34. The method according to claim 31, further characterized in that it comprises adding at least one other frequency member to an active set. 35. The method according to claim 31, characterized in that the access terminal is allowed to transparently transfer at least one other frequency member during an inactive session. 36. The method according to claim 31, characterized in that the access terminal is allowed to transparently transfer at least one other frequency member during an active session. 37. The method according to claim 31, characterized in that the access terminal is allowed to transparently transfer at least one other frequency member if there is an uninterrupted radio link. 38. The method according to claim 31, characterized in that the access terminal is not allowed to transparently transfer at least one other frequency member if there is an interruption in a radio link. 39. An access network that provides inter-frequency transfer in a wireless communication system, characterized in that it comprises: a receiver that receives a request for tuning coming from a mobile device; and a transmitter that sends an AttachmentAssignation message that notifies the mobile device that at least two access networks are included in an active set. 40. The access point according to claim 39, further characterized in that the transmitter requests at least a second access network that responds with resources available to the second access network for the mobile device. 41. The access point according to claim 39, further characterized in that the receiver receives resource information from at least one second access network.