RU2439844C2 - Apparatus and method of performing handover in communication network - Google Patents

Abstract

FIELD: information technology.

SUBSTANCE: method of performing handover involves transmission, in parallel with continuation of transmission completion, the status of data on handover of a session to a functional referencing network module, wherein the status of handover data contain an indicator of the target transceiver module and a sequence marker, wherein the status of handover data acts so as to initiate the functional referencing network module in order to transmit part of the ordered sequence of data packets to the identified target transceiver module from a shadow buffer until completion of handover, wherein the part begins after the end of the segment identified through the sequence marker.

EFFECT: efficient handover with short communication session delay time.

29 cl, 10 dwg

Description

Priority claim according to 35 U.S.C. §119

This patent application claims priority:

- provisional application number 60/908055, entitled "NETWORK CONTROL FUNCTION LAYER 2 HANDOFF LOW LEVEL DESIGN", filed March 26, 2007,

- provisional application number 60/908120 entitled "NETWORK FUNCTION HIGH LEVEL DESIGN", filed March 26, 2007, and

- provisional application number 60/908047, entitled "TRANSCIEVER FUNCTION SOFTWARE HIGH LEVEL DESIGN", filed March 26, 2007,

all of which are assigned to the assignee of this application and thus are expressly contained in this document by reference.

State of the art

FIELD OF THE INVENTION

The following description generally relates to wireless communications, and more specifically, to methods and apparatuses for performing session handoff between network entities.

State of the art

Over the past few years, wireless technology has evolved from analog systems to digital systems. Typically in traditional analog systems, analog signals are broadcast on the forward link and reverse link and require a significant amount of bandwidth in order to transmit and receive signals while being associated with good quality. Since analog signals are continuous in time and space, status messages (for example, messages indicating received or not received data) are not generated. In contrast, packet-switched systems enable the conversion of analog signals into data packets and their transmission through a physical channel between the access terminal and the base station, router, etc. In addition, digital data can be broadcast in its natural form (for example, text, Internet data, etc.) through the use of a packet-switched network. In essence, digital wireless communication systems are widely deployed in order to provide various communication services, for example, telephone, video, data, messaging, broadcast, and the like.

Due to the increasing use of wireless devices in order to perform services with increasing data requirements, the bandwidth and data rates of the wireless network are also increasing. In essence, wireless access points can accumulate data queues intended for a wireless device served by an access point. In prior art systems where switching a wireless device’s communication session was required from one access point to another access point, these data queues were small enough to be easily operated without affecting the quality of the connection. In modern networks with high data rates, however, data queues can become quite large if handoffs are not fast. Such large data queues adversely affect the latency experienced by the current service, and in services such as Voice-over-IP (VoIP), latency is an important QoS issue. Additionally, such large queues may require an increase in the use of relay networks in order to successfully transmit data, which negatively affects the cost of the network, since the use of relay networks is costly.

Thus, in these high data rate systems, efficient handoff between different entities becomes important when performing handover of a session.

SUMMARY OF THE INVENTION

The following is a simplified summary in order to provide a basic understanding of the described aspects. This entity is not a comprehensive overview, and it does not intend either to identify key or critical elements or to delimit the scope of these aspects. Its purpose is to present some ideas of the described aspects in a simplified form as an introduction to the more detailed description that is presented later.

In an aspect, a method for performing a session handover in a wireless communication system comprises: receiving an ordered sequence of data packets from a functional network binding module after establishing a communication session with an access terminal, wherein the communication session is controlled by the functional network binding module, the functional network binding module comprising a shadow a buffer configured to store an ordered sequence of data packets; receiving a handover request from a target transceiver module during a segment transmission of an ordered sequence of data packets to an access terminal through a session; identifying a sequence marker corresponding to the end of the segment as being the end point of transmission; Continuation of transmission completion until the end of the segment and transmitting, in parallel with the continuation of the completion of the transfer, the state of the handover data of the session to the functional network binding module, wherein the state of the data of the handover contains the identifier of the target transceiver module and a sequence marker, wherein the state of the handover data acts to initiate the functional network module bindings so as to transmit part of an ordered sequence of data packets to an identified target transceiver module chick from the shadow buffer, with the part starting after the end of the segment identified by the sequence marker.

In another aspect, the at least one processor configured to perform handover of a session in a wireless communication system comprises: a first module for receiving an ordered sequence of data packets from a functional network binding module after establishing a communication session with an access terminal, wherein the communication session controlled by a functional network binding module, wherein the functional network binding module contains a shadow buffer configured to store an ordered a sequence of data packets; a second module for receiving a handover request from the target transceiver module while transmitting a segment of an ordered sequence of data packets to the access terminal through a session; a third module for identifying a sequence marker corresponding to the end of the segment as being the end point of transmission; a fourth module to continue transmitting completion until the end of the segment; and a fifth module for transmitting, in parallel with continuing the completion of the transfer, the state of the handover data of the session to the functional network binding module, wherein the state of the data of the handover contains the identifier of the target transceiver module and a sequence marker, the state of the handover data acts to initiate functional network binding module so as to transmit a fraction of the ordered sequence of data packets to the identified target module about the transceiver from the shadow buffer, with the fraction starting after the end of the segment identified by the sequence marker.

In an additional aspect, a computer program product for performing a session handover in a wireless communication system comprises: a computer readable medium comprising: at least one instruction to cause a computer to receive an ordered sequence of data packets from a functional network binding module after establishing a communication session with a terminal access, while the communication session is controlled by the functional network binding module, and the functional network binding module contains a shadow buffer, configured to store an ordered sequence of data packets; at least one instruction to cause a computer to receive a handover request from a target transceiver module while transmitting a segment of an ordered sequence of data packets to an access terminal through a session; at least one instruction to cause the computer to identify the sequence marker corresponding to the end of the segment as being the end point of transmission; at least one instruction to cause the computer to continue to complete the transfer to the end of the segment; and at least one instruction to cause the computer to transmit, in parallel with continued completion of the transfer, the state of the session handover data to the functional network binding module, wherein the state of the handoff data contains the identifier of the target transceiver module and a sequence marker, the state handover data acts to initiate a functional network binding module so as to transmit part of an ordered sequence to a packet s data to the identified target transceiver module from the shadow buffer, the part begins after the end of the segment identified by the marker sequence.

In yet another aspect, the access point comprises: means for receiving an ordered sequence of data packets from the functional network binding module after establishing a communication session with the access terminal, wherein the communication session is controlled by the functional network binding module, the functional network binding module comprising a shadow buffer configured with the ability to store an ordered sequence of data packets; means for receiving a handover request from the target transceiver module while transmitting a segment of an ordered sequence of data packets to the access terminal through a session; means for identifying a sequence marker corresponding to the end of a segment as being a transmission termination point; means for continuing to complete the transmission to the end of the segment; and means for transmitting, in parallel with continuing the completion of the transfer, the state of the handover data of the session to the functional network binding module, wherein the state of the data of the handoff contains the identifier of the target transceiver module and a sequence marker, wherein the state of the handover data acts to initiate the functional network binding module so as to transmit part of an ordered sequence of data packets to the identified module of the target the receiver from the shadow buffer, with the part starting after the end of the segment identified by the sequence marker.

In a further aspect, the access point comprises: a storage device comprising: a handover manager module having a sequence determination logical node; a processor in communication with the storage device and configured to execute a handover manager module; an initial transceiver module configured to receive an ordered sequence of data packets from the functional network binding module after establishing a communication session with the access terminal, wherein the communication session is controlled by the functional network binding module, wherein the functional network binding module contains a shadow buffer configured to store the ordered sequence of data packets; wherein the source transceiver module is configured to receive a handover request from the target transceiver module while transmitting a segment of an ordered sequence of data packets to the access terminal through a session; wherein the sequence determination logical unit is configured to identify a sequence marker corresponding to the end of a segment as being a transmission termination point; wherein, the source transceiver module is configured to complete transmission to the end of the segment; and while the source transceiver module is configured to complete transmitting, in parallel with the continuation of the completion of the transmission, the state of the session handover data to the functional network binding module, while the state of the handoff data contains the identifier of the target transceiver module and a sequence marker, the data state of handoff acts to initiate a functional network binding module so as to transmit part ordered after the sequence of data packets to the identified module of the target transceiver from the shadow buffer, with the part starting after the end of the segment identified by the sequence marker.

In yet another aspect, a method of performing a session handover in a wireless communication system comprises: determining that there are conditions for requesting a handoff of an established communication session from a source transceiver module to a target transceiver module, the determination being made while receiving a segment of an ordered sequence of data packets from source transceiver module; transmitting the handover request to the target transceiver module based on the determination, wherein the handover request is valid to initiate the target transceiver module so as to receive and queue a portion of the ordered sequence of data packets from the shadow buffer of the functional network binding module while receiving the segment wherein the part corresponds to a fragment of an ordered sequence after a segment; receiving the last transmission corresponding to the segment from the source transceiver module; establishing a communication session with the function of the target transceiver after receiving the last transmission from the module of the original transceiver; and receiving part of the ordered sequence of data packets from the function of the target transceiver, under the control of the functional network binding module, from the queue without a significant delay time after establishing a communication session with the function of the target transceiver.

In a further aspect, the at least one processor for performing a session handover in a wireless communication system comprises: a first module for determining that there are conditions for requesting a handoff of an established communication session from the source transceiver module to the target transceiver module, the determination occurring during receiving a segment of an ordered sequence of data packets from a source transceiver module; a second module for transmitting the handover request to the target transceiver module based on the determination, wherein the handover request acts to initiate the target transceiver module to receive and queue a portion of the ordered sequence of data packets from the shadow buffer of the network functional binding module into the time of receiving the segment, the part corresponding to a fragment of an ordered sequence after the segment; a third module for receiving the last transmission corresponding to the segment from the module of the original transceiver; a fourth module for establishing a communication session with the function of the target transceiver after receiving the last transmission from the module of the original transceiver; and the third module further receives a part of the ordered sequence of data packets from the function of the target transceiver, under the control of the functional network binding module, from the queue without significant delay time after establishing a communication session with the function of the target transceiver.

In another aspect, a computer program product for performing session handover in a wireless communication system comprises: a computer-readable medium comprising: at least one instruction to cause a computer to determine that conditions exist for requesting a handoff of an established session from a source module transceiver module of the target transceiver, and the determination occurs while receiving a segment of an ordered sequence of data packets from the source module th transceiver; at least one instruction to cause a computer to transmit a handover request to a target transceiver module based on the determination, wherein the handover request acts to initiate a target transceiver module to receive and queue a portion of an ordered sequence of data packets from a shadow buffer of the functional network binding module during reception of the segment, the part corresponding to a fragment of an ordered sequence after the segment; at least one instruction to cause the computer to receive the latest transmission corresponding to the segment from the source transceiver module; at least one instruction to force the computer to establish a communication session with the function of the target transceiver after receiving the last transmission from the module of the original transceiver; and at least one instruction to cause the computer to receive part of an ordered sequence of data packets from the function of the target transceiver, under the control of the functional network binding module, from the queue without significant delay time after establishing a communication session with the function of the target transceiver.

In an additional aspect, the access terminal comprises: means for determining that conditions exist for requesting a handoff of an established communication session from the source transceiver module to the target transceiver module, the determination occurring during reception of a segment of an ordered sequence of data packets from the source transceiver module; means for transmitting a handover request to the target transceiver module based on the determination, wherein the handover request is operative to initiate the target transceiver module to receive and queue a portion of the ordered sequence of data packets from the shadow buffer of the functional network binding module during receiving a segment, the part corresponding to a fragment of an ordered sequence after the segment; means for receiving the last transmission corresponding to the segment from the module of the original transceiver; means for establishing a communication session with the function of the target transceiver after receiving the last transmission from the module of the original transceiver; and means for receiving part of the ordered sequence of data packets from the function of the target transceiver, under the control of the functional network binding module, from the queue without significant delay time after establishing a communication session with the function of the target transceiver.

In yet another aspect, the access terminal comprises: a storage device comprising a handover manager module having a handover determination logical node and a handover requestor logical node; a processor in communication with the storage device and configured to execute a handover manager module; wherein the logical unit for determining a handoff is configured to determine that there are conditions for requesting a handoff of an established communication session from the source transceiver module to the target transceiver module, the determination being made while receiving a segment of an ordered sequence of data packets from the source transceiver module; wherein the logical unit of the handover requestor is configured to transmit a handover request to the target transceiver module based on the determination, the handover request is valid to initiate the target transceiver module to receive and queue a portion of an ordered sequence of data packets from the shadow buffer of the functional network binding module during segment reception, the part corresponding to a fragment of an ordered sequence flax after segment; a communication module in communication with the storage device and the processor and configured to receive the last transmission corresponding to the segment from the module of the original transceiver; wherein the handover manager module is configured to establish a communication session with the function of the target transceiver after receiving the last transmission from the source transceiver module; and the communication module is further configured to receive part of an ordered sequence of data packets from the function of the target transceiver, under the control of the functional network binding module, from the queue without significant delay time after establishing a communication session with the function of the target transceiver.

An additional aspect includes a method of performing session handover by a network-side system of a wireless communication system, comprising: controlling a session of an access terminal with a source transceiver module, transmitting an ordered sequence of data packets destined for the access terminal to the source transceiver module; copying an ordered sequence of data packets to a shadow buffer, configured to store an ordered sequence of data packets; receiving, by the source transceiver module, a handover request from the target transceiver module while transmitting a segment of an ordered sequence of data packets to the access terminal through a session; identification, through the module of the original transceiver, a marker of the sequence corresponding to the end of the segment, as being the point of completion of transmission; continued completion of the transmission, through the module of the original transceiver, to the end of the segment; transmitting, in parallel with continuing the completion of the transmission, by the source transceiver module, the state of the session handover data to the functional network binding module, wherein the state of the handoff data contains the identifier of the target transceiver module and a sequence marker; transmitting, through the functional network binding module and in response to receiving the state of the handover data, part of the ordered sequence of data packets to the identified target transceiver module from the shadow buffer, the part starting after the end of the segment identified by the sequence marker; and receiving, through a functional network module, the binding from the module of the original transceiver, packet data coming from the access terminal during transmission of part of the ordered sequence of data packets.

An additional aspect includes a system for performing a handover of a session of a wireless communication system, comprising: a functional network binding module having a corresponding shadow buffer, wherein the functional network binding module is configured to control a communication session of the access terminal with the source transceiver module, while the functional network the binding module is configured to transmit an ordered sequence of data packets to the original transceiver module, p ednaznachennyh for the access terminal, wherein the network functional binding module is further configured to copy an ordered sequence of data packets in the shadow buffer that is adapted to store an ordered sequence of data packets; wherein the source transceiver module is configured to receive a handover request from the target transceiver module while transmitting a segment of an ordered sequence of data packets to the access terminal through a session, while the source transceiver module is able to identify the sequence marker corresponding to the end of the segment as being a point complete the transmission, while the module of the original transceiver is configured to complete execution accept the transmission, through the module of the original transceiver, to the end of the segment; wherein the source transceiver module is configured to transmit, in parallel with continued completion of the transmission, the state of the session handover data to the functional network binding module, wherein the state of the handoff data contains the identifier of the target transceiver module and a sequence marker; wherein the functional network binding module, in response to receiving the state of the handover data, is configured to transmit a portion of the ordered sequence of data packets to the identified target transceiver module from the shadow buffer, the portion starting after the end of the segment identified by the sequence marker; and at the same time, the functional network binding module is configured to receive, from the source transceiver module, packet data coming from the access terminal while transmitting a portion of the ordered sequence of data packets.

To the accomplishment of the foregoing and related ends, certain illustrative aspects are described herein in conjunction with the following description and the accompanying drawings. These aspects, however, indicate only some of the many ways in which the principles of the disclosed subject matter can be applied, and the claimed subject matter intends to include all such aspects and their equivalents. Other advantages and features of novelty may become apparent from the following detailed description when considered in conjunction with the drawings.

Brief Description of the Drawings

Figure 1 is a schematic representation of one aspect of an effective handover system;

FIG. 2 is a schematic representation of one aspect of an implementation in the form of a computer device of one or more of the components of FIG. 1;

FIG. 3 is a schematic diagram of one aspect of the functional module of the access terminal of FIG. 1;

FIG. 4 is a schematic representation of one aspect of the functional module of the source access point of FIG. 1;

FIG. 5 is a schematic diagram of one aspect of the functional module of an access point in the binding of FIG. 1;

FIG. 6 is a schematic diagram of one aspect of a functional module of a target access point of FIG. 1;

7 is a flowchart of an aspect call flow for a call flow of the system of FIG. 1;

FIG. 8 is a flowchart of one aspect of the method of the source access point of FIG. 1;

FIG. 9 is a flowchart of one aspect of the access terminal method of FIG. 1; and

10 is a flowchart of one aspect of a method for transmitting a state from a source transceiver to a target transceiver.

DETAILED DESCRIPTION OF THE INVENTION

Various aspects are described below with reference to the drawings. In the following description, for purposes of explanation, many specific details are set forth in order to provide a thorough understanding of one or more aspects. However, it may be obvious that such aspects may be practiced without these specific details.

When used in this application, the terms "component", "module", "system", etc. intend to include a computer-related object, such as, but not limited to, hardware, hardware-based software, a combination of hardware and software, software or software during execution. For example, a component may be, but not only a process running on a processor; a processor; an object; executable file; flow of execution; program and / or computer. By way of illustration, both an application running on a computing device and a computing device may be a component. One or more components may reside within a process and / or thread of execution, and the component may be localized on 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 storage structures. The components can communicate through local and / or remote processes, for example, in accordance with a signal having one or more data packets, for example, data from one component interacting with another component in a local system, distributed system and / or network, for example, over the Internet, with other systems via signal.

In addition, various aspects are described herein in connection with a terminal, which may be a wired terminal or a wireless terminal. A terminal may also be called a system, device, subscriber module, subscriber station, mobile station, mobile device, mobile device, remote station, remote terminal, access terminal, user terminal, terminal, communication device, user agent, user device, or user device (UE ) A wireless device can be a cell phone, satellite phone, cordless phone, Session Initiation Protocol (SIP) phone, Wireless Subscriber Access Station (WLL), personal digital device (PDA), handheld device with wireless connections, a computing device, or other processing devices connected to a wireless modem. In addition, various aspects are described herein in connection with a base station. A base station may be used to communicate with wireless terminal (s) and may also be referred to as an access point, node B, advanced base station (eBS), or some other terminology.

In addition, the term “or” is intended to mean an inclusive or instead of an exclusive or. Thus, unless otherwise indicated or is not apparent from the context, “X applies A or B” is intended to mean any of the natural inclusive permutations. Thus, the phrase “X applies A or B” is satisfied by any of the following cases: “X applies A; X applies B; or X applies both A and B”. In addition, the articles "a" and "an" used in this application and the attached claims, in General, should be construed so as to mean "one or more", unless otherwise indicated or is not obvious from the context, which is directed to the form singular.

The techniques described herein may be used for various wireless communication systems such as CDMA, TDMA, FDMA, OFDMA, SC-FDMA and other systems. The terms “system” and “network” are often used interchangeably. A CDMA system may implement a radio technology such as universal terrestrial radio access (UTRA) cdma2000, etc. UTRA includes Broadband CDMA (W-CDMA) and other CDMA options. Additionally, cdma2000 covers IS-2000, IS-95, and IS-856 standards. A TDMA system may implement a radio technology such as Global System for Mobile Communications (GSM). An OFDMA system can implement such radio technology as Enhanced UTRA (E-UTRA), Ultra Broadband Mobile Transmission (UMB), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDM®, etc. .d. UTRA and E-UTRA are part of the Universal Mobile Communications System (UMTS). 3GPP Long Term Evolution (LTE) Standard is a version of UMTS that uses E-UTRA, which uses OFDMA in the downlink and SC-FDMA in the uplink. UTRA, E-UTRA, UMTS, LTE and GSM are described in documents from an organization called the Third Generation Partnership Project (3GPP). Additionally, cdma2000 and UMB are described in documents from an organization called the Third Generation Partnership Project 2 (3GPP2).

Various aspects or features are presented with respect to systems, which may include a number of devices, components, modules, and the like. It should be understood and taken into account that various systems may include additional devices, components, modules, etc. and / or may not include all of the devices, components, modules, etc., explained in connection with the drawings. A combination of these approaches may also be used.

Referring to FIG. 1, in one aspect, a system 10 for performing efficient handover in a high data rate network 12 includes a plurality of access points 14 16, 18 potentially configured to functionally connect the access terminal 20 to the network 12. B in particular, access point 16 includes an original transceiver module 22 having an established wireless session 24 with access terminal 20. Additionally, the access point 16 is in communication with the access point 14, which includes a functional network binding module 26, which controls the communication session 24. In particular, the functional network binding module 26 controls the establishment and transmission of the communication session 24 and additionally acts as an interface between the network 12 and any access point having a communication session 24 with the access terminal 20. In this case, for example, the functional network binding module 26 receives and orders data packets from the network 12 and then transmits the resulting sequence of ordered data packets 28 to the original transceiver module 22 for transmission to the access terminal 20. Additionally, access point 14 includes a shadow buffer 30, such as a fixed-volume dynamic storage device (for example, first-in-first-out type), which stores a copy of the sequence of ordered data packets 28 sent to the original transceiver module 22.

Since the access terminal 20 is mobile within the system 10, the access terminal 20 can move to a position where the access terminal 20 is subject to conditions that initiate a handover of the communication session 24 to another access point. For example, the access terminal 20 continuously monitors the pilot signal strength of neighboring access points and may choose to switch the access point based on a comparison of the pilot signal intensities. For example, an access terminal 20 moving in a direction 31 to an access point 18 can ultimately reach this position, thereby initiating a target transceiver module 32 of the access point 18 so as to transmit a handover request 34 to the original transceiver module 22 of the access point 16 .

When the source transceiver module 22 receives a handover request 34 during the transmission of a sequence segment of ordered data packets 28, system 10 provides a series of actions that must be taken to provide a relatively fast and efficient handoff that minimizes the delay time experienced in the current transmission. In particular, the system 10 enables the source transceiver module 22 to complete the current transmission of the sequence segment of the ordered data packets 28, while simultaneously or parallelly informing the target transceiver module 32 of the completion of the current transmission, which must be completed by the source transceiver module 22, and in some aspects additionally providing simultaneously or in parallel new ordered data packets after a sequence of ordered data packets 28, which e shall not be routed to the target transceiver module 32 for delivery to the access terminal 20 after a handover.

In particular, upon receipt of a handover request 34, the source transceiver module 22 performs the following actions almost simultaneously or almost in parallel: identifies a sequence marker 36 corresponding to the end of the segment currently being transmitted as being the end point of the transmission; continues to complete the current transfer until the end of the segment; generates a message 38 with data status of the transmission service, which sets the state of the session, which includes a marker 36 sequence and the identifier 40 of the module of the target transceiver; and transmits, in parallel with the continuation of the completion of the transmission of the segment, the message 38 status data on the transfer of service to the functional network module 26 binding.

After receiving the handover data status message 38, the binding functional network module 26 immediately switches the transmission of all new data packets 42 after a sequence of ordered data packets 28 so that they are sent to the identified target transceiver module 32. Additionally, based on the data sequence marker 36, the network binding functional module 26 can identify the end of the last segment transmitted by the original transceiver module 22 in a copy of the sequence of data packets 28 stored in the shadow buffer 30, and then sends the rest of the data packet 44 to the identified module 32 of the target transceiver. Thus, in the module 32 of the target transceiver, data packets for the communication session 24 are pre-loaded before the actual handover of the communication session 24.

Additionally, after the segment transfer is completed, thereby transmitting the sequence of ordered data packets 28 up to the sequence marker 36, the source transceiver module 22 transmits a handover response 46 to the target transceiver module 32 to formally complete the handover of the communication session 24, thereby saving half the transit time of the packet to the destination and back on the relay network 3. For example, the response 46 on the transfer of service may include information about the state uu session, such as, but not only, the state of one or more communication lines, the state of the retransmission buffer status and control buffer. Here, the network functional binding module 26 confirms to both transceiver modules that the target transceiver module 32 is now serving the access terminal 20, and the functional network binding module 26 continues to control communication, even if a handover has occurred.

Additionally, in another aspect, if the target transceiver module 32 is notified by the access terminal 20 or detects, based on the retransmission buffer in the handover response 46, that a packet or segment sent by the function module of the source transceiver 32 is not received, then the function module 32 of the target transceiver should not be in contact with the module 22 of the original transceiver and receive it from the transmit buffer in it. Instead, the target transceiver module 32 can save the use of a relay network by retrieving the missing packet or data segment from the shadow buffer 30 based on the corresponding sequence marker of the missing packet or data segment.

In fact, the described architecture considers several possible Layer 2 handoffs from one transceiver module to another transceiver module, corresponding to transceivers in different locations, without the need to implement a Layer 3 handoff from one network functional module to another network functional module, until access terminal 20 has moved to a relatively large distance or did not go into a mobile / rest state during which a handover Layer 3 may be implemented during a period when data transmission does not occur.

There are various advantages to this approach. For example, one advantage is that it is not necessary to remember which module or modules of the transceiver were previously serving. Instead, this approach provides the ability to retrieve unsent and retransmitted data packets from a network functional module. Additionally, since the network functional module includes a shadow buffer for buffering ordered data packets sent to the serving transceiver module, this approach allows instructing the network functional module to send all new data to the new transceiver module immediately after initiating the handover and before its completion, all of this while the old transceiver module is finishing transmitting with the access terminal. For example, the current transmission of a segment of a sequence of ordered data packets may be a sequential transmission that allows for error correction by allowing retransmissions. By preparing in advance for the handover, when the handover actually occurs, the new transceiver module already has data to transmit on the forward link to the access terminal.

Additionally, in some aspects, the sequence marker 36 may be a byte sequence marker, as opposed to a packet switched sequence marker. Advantageously, the byte sequence marker 36 provides the ability to track partial data packets, thereby minimizing or eliminating even partial packet loss.

Additionally, it has been found that the present apparatuses and methods provide for the possibility of a handover occurring in a period of time from about 20 milliseconds to 60 milliseconds in some aspects, in a period of time from about 40 milliseconds to 80 milliseconds in another aspect, and less than 100 milliseconds in another aspect.

Referring to FIG. 2, system components 10 (FIG. 1) can be implemented in a computer device 50, which includes a storage device 52 in communication with the processor 54. The storage device 52 is configured to store applications for execution by the processor 54 Storage device 52 may include random access memory (RAM), read only memory (ROM), and a combination of the above. In particular, each component of system 10 (FIG. 1) may include one or more functional modules, applications, or programs 62 configured to perform component-specific actions described herein. Additionally, the processor 54 is configured to perform processing functions associated with one or more of the components described herein. The processor 54 may include a single processor or multiple sets of processors or multi-core processors. In addition, processor 54 may be implemented as an integrated processing system and / or distributed processing system.

Additionally, the computer device 50 includes a user interface 56 configured to receive input from a user of the access terminal 20 and generate output signals for presentation to the user. User interface 56 may include one or more input devices, including, but not limited to, a keyboard, numeric keypad, mouse, touch screen, navigation key, function key, microphone, speech recognition component, any other input-accepting mechanism from the user, or any combination of the above. Additionally, the user interface 56 may include one or more output devices, including, but not limited to, a display, a speaker, a tactile feedback mechanism, a printer, any other mechanism capable of presenting the output to the user, or any combination of the above.

Additionally, the computer device 50 includes a communication component 58, which provides for establishing and maintaining communication with one or more other components using hardware, software, and services. Communication component 58 may communicate between components in computer device 50, as well as between computer device 50 and external devices, such as access points 14, 16, 18 (FIG. 1), other elements on the network or infrastructure side, or other devices, in series or locally connected to a computer device 50. The communication component 58 includes a receiving device for receiving data, and a transmitting device for transmitting data. Additionally, the communication component 58 includes respective receive channel components and transmission channel components to allow messaging according to one or more respective protocols.

Additionally, the computer device 50 may further include a database 60, which may be any suitable combination of hardware and / or software that provides storage of large amounts of data / information, data relationships and programs / applications used in conjunction with aspects, described herein when they are not used in the active storage device 52. Additionally, the database 60 may store one or more functional modules / programs / applications 62, when yes, the corresponding applications are not in the active storage device 50.

Referring to FIG. 3, in one aspect of access terminal 20, functional programs 62 (FIG. 2) may include an access terminal (AT) handover manager module 70, which includes a logical node, executable instructions, etc. in order to perform the handover-related functionality described herein. In particular, the AT handoff manager module 70 may include a handoff determination logic 72 to evaluate signal strength of various access points and determine when conditions for handoff exist. Additionally, the AT handoff manager module 70 may include a handoff requestor logic 74 responsive to a determination logic 72 to notify the target transceiver module 32 that a handover has been requested. Additionally, the AT handover manager module 70 may include a handover resource allocation logic 76 to manage and coordinate the allocation of handoff resources for a session.

Referring to FIG. 4, in one aspect of access point 16, functional programs 62 (FIG. 2) may include a handover manager module 80 at a source access point (AP), which includes a logical node, executable instructions, etc. e. to perform the handover related functionality described herein. In particular, the source AP handover manager module 80 may include a sequence determination logic unit 82 configured to evaluate the current transmission and find the transmit end point to set the sequence marker 36 (FIG. 1). Additionally, the source AP handover manager module 80 may include a target determination logic 84 to analyze a handover request 34 and determine the identifier 40 of the target transceiver module. Further, the source AP handover manager module 80 may include a completion determination logic 86 to determine when a handover is completed. Additionally, the source AP handover manager module 80 is configured to generate and initiate the transmission of a handover data status message 38 and a handover response message 46.

Referring to FIG. 5, in one aspect of access point 14, functional programs 62 (FIG. 2) may include an AP binding handover manager module 90, which includes a logical node, executable instructions, etc., to execute handover-related functionality described in this document. In particular, the AP AP handover manager module 90 may include a control logic node 92 to control data routing on the forward link and on the reverse link between network 12 (FIG. 1) and one or more other access points holding communication sessions with one or more access terminals. Additionally, the AP binding handover manager module 90 may include a shadow logical node 94 to control the operation of the shadow buffer 30 (FIG. 1) and retrieve data packets from it. Additionally, the AP binding handover manager module 90 may include a switching logic 96 to control session management change from one transceiver module to another transceiver module, including controlling the exchange of status information including buffers. Additionally, the AP binding handover manager module 90 may include a sequence determination logic 98 that is configured to respond to requests to receive data from the shadow buffer 30, including responding to the handover data status message 38, and requests for erroneous data packets.

Referring to FIG. 6, in one aspect of access point 18, functional programs 62 (FIG. 2) may include a handover manager module of a target AP 101 that includes a logical node, executable instructions, etc., to execute handover-related functionality described in this document. In particular, the handover manager module 90 of the target AP may include a handover request logic 103 responsive to receiving a handover request from the access terminal to generate and transmit a handover request message 34. Additionally, the target AP handover manager module 90 may include forward link (FL) and or reverse link (RL) queues 105 configured to queue data packets terminated or initiated from the corresponding access terminal for which the module 90, the handover manager of the target AP may be serving, or may mainly serve, based on preparations for handover. Additionally, the target AP handover manager module 90 may include an ordering logic 107 to determine how to order the data held in the queues or the data received in the preparation of the handover, such as part 44 of the data packet, and / or erroneous data, such as those that may be detected upon receipt of the status information of the source transceiver module after completion of the handover.

Referring to FIG. 7, in one non-limiting aspect, the call flow sequence 111 details interactions between various high data rate network components, such as system 10 (FIG. 1). In this example, the access terminal (AT) 20 has a source TF 22, a target TF 32, and another TF 33 as potential transceiver modules with which the AT 20 can communicate, otherwise referred to as an “active set". Each transceiver module in the active set receives a unique index of the active set, so that TF 22 is assigned “0”, TF 32 is assigned “1” and TF 33 is assigned “2” in this example. In any case, at block 115, the source TF 22 maintains a communication session with the AT 20, which may also be referred to as providing a serving sector, since each TF may serve a different sector. At block 117, the AT 20 detects conditions that initiate a handover, such as a weakening of the pilot signal strength of the source TF 22 and / or an increasing pilot signal strength of the target TF 32. The AT 20 identifies the sector (member of the active set) that it would like to so that a handover is performed, and in blocks 119, 121, and 123 sends a control change request that identifies the desired serving sector for all transceiver modules in the active set to complete the handoff. In blocks 125 and 127, the source TF 22 and the target TF 32 detect that they are TFs participating in the desired handover. In response to this, in block 129, the target TF 32 sends a handover request to the source TF 22. In response to this, in block 131, the source TF 22 sends a handover data status message to the functional session module 26 or, more specifically, to its part of the control module, called the binding network management function 27. As explained above, the handover data status message identifies the target TF 32 as TF in order to receive the session, as well as a sequence marker identifying where the source TF 22 should stop transmitting data.

At this point, it should be noted that in some aspects, for example, in implementing the UMB standard for mobile devices (UMB), the access point can be divided into separate objects, namely, the network management function (NCF), the network data management function (NDF); and transceiver function (TF). In general, the NCF can initiate session and connection layer overhead protocols, for example, transfer session control from one TF to another TF. For example, such actions may include: access to a control system from an access terminal (AT); providing functions for detecting / creating / ending a session, distributing / releasing allocated connection resources, etc. As noted above, the transceiver (TF) function may further represent a sector that performs functionality associated with a medium access control (MAC) layer (for example, to provide a radio interface anchor point for access terminals in its sector). Additionally, the network data management (NDF) function may implement a data processing function to transmit data between the network and the transceiver function that serves the access terminal. In addition, the ability of the NDF to route data packets can be controlled by the NCF, which characterizes the relationship between terminals and transceiver functions along with associated handovers. Accordingly, for the forward link graph from the network to the access terminal, the NDF can manage the shadow buffer and organize by the virtual radio link protocol (VRLP), etc., and perform the corresponding functionality in the reverse link graph from the access terminal to the network.

Returning to the call flow, after receiving the handover data status message in block 131, the binding NCF 27 is configured to generate and transmit a handover switching command to NDF 29, in block 133. The handover switching command identifies the AT target TF corresponding to MAC identifier and sequence marker from a handover data status message. In block 135, the binding NCF 27 maintains a reverse link connection from the AT 20 through the source TF 22 and to the binding NDF 29 until the handover is completed, while in blocks 137 and 139, the binding NCF 27 immediately sends all forward link data packets after sequence markers so as to be sent to the target TF 32, where they must be queued for delivery to the AT 20 after handover. At block 141, the source TF 22 completes the transmission. In one aspect, for example, termination includes performing the last retransmission with error correction, such as the last hybrid automatic request transmission (HARQ) corresponding to the source TF 22 of the last source of the data segment indicating that it should be sent. Accordingly, in block 145, the source TF 22 sends a handover response message to the target TF 32 to confirm the handover. The handover response message may include final status information, including one or more of final information about which sequences have been transmitted, information regarding retransmission buffers, information regarding control buffers, and information regarding levels of reverse link buffers .

Additionally, exemplary states for transmission may include: data state, connection state, session state, and the like. The data state may be referred to as the state of the access network in the data path between the access terminal and the network data management function during a connection and / or handover. This data state may further include elements such as the state of the header compression module or the status of the radio link buffers, which are typically dynamic in nature. Similarly, the connection state can characterize the state of the access network in the control path between the access terminal and the NCF, which is not saved when the connection is disconnected, and the access terminal remains idle. The connection status may further include information such as a set of radio interface resources reserved for the access terminal, power control loop values, active set information, and the like.

In essence, the target TF 32 now has all the information it needs to understand where to leave the original TF 22 relative to the communication session. In addition, after sending the handover response, at block 145, the source TF 22 confirms the handover with the binding NCF 27 by sending a handover message that includes the target TF 32 and the index of the active set of the target TFs. Meanwhile, at block 147, the target TF 32 sends one or more messages with allocated resources to establish communication with the AT 20 and take control of the session. After receiving the handover message from the source TF 22, in blocks 151, 153 and 155, the NCF 27 sends a handover complete message to all TFs in the active set, and the handover complete message identifies the serving TF, i.e. target TF 32. Thus, the call flow 111 denotes a Layer 2 handoff detection and switching that works efficiently to reduce the delay time for a high data rate network. For example, in one aspect, the call flow 11 may reduce delay time in networks such as a High Speed Data System (HSDS) network having a data rate of more than about 1 Mbps, or in another aspect, more than about 5 Mbit / second, while in other aspects in the range from about 10 Mbit / second to about 150 Mbit / second. Additionally, the architecture of the call flow sequence 111 places RLP functionality adjacent to the AT 20 to further reduce latency, as opposed to having RLP functionality deep in the network.

The ways the system works are explained below. Although an exemplary method is illustrated and described herein as a sequence of blocks representing various events and / or actions, the present aspect is not limited to the illustrated order of these blocks. For example, some actions or events may occur in a different sequence and / or simultaneously with other actions or events, along with the sequence illustrated herein, in accordance with the described aspects. In addition, not all illustrated blocks, events, or actions may be required in order to implement a methodology in accordance with the present aspects. In addition, it should be understood that the exemplary method and other methods according to the described aspects can be implemented in association with the method illustrated and described in this document, as well as in association with other un illustrated or undescribed systems and devices.

In operation, referring to FIG. 8, in one aspect, a method 160 for performing a handover of a session in a wireless communication system comprises receiving an ordered sequence of data packets from a functional network binding module after establishing a communication session with an access terminal. In this case, the communication session is controlled by the functional network binding module, while the functional network binding module contains a shadow buffer configured to store an ordered sequence of data packets (block 162). For example, an ordered sequence of data packets may be received in a straight line from a network element of a data control function.

Additionally, the method includes receiving a handover request from a target transceiver module while transmitting a segment of an ordered sequence of data packets to an access terminal through a session (block 164). For example, the target transceiver module may have received a request from the access terminal to initiate a handover.

In addition, the method includes identifying a sequence marker corresponding to the end of the segment as being the end point of transmission (block 166). For example, the source transceiver module is configured to identify the end of the segment that it is currently transmitting, which can be sequential transmission, which, for example, can be encountered in error-corrected transmission, which allows transmission to be repeated.

In addition, the method includes continuing transmission completion to the end of the segment (block 168). As noted, the transmission may be an error correction transmission, such as a hybrid ARQ transmission.

Additionally, the method includes transmitting, in parallel with continuing to complete the transfer, the state of the session handover data to the functional network binding module. In this case, the state of the handover data contains the identifier of the target transceiver module and the sequence marker. Additionally, the state of the handover data acts to initiate a functional network binding module so as to transmit part of the ordered sequence of data packets to the identified target transceiver module from the shadow buffer, with the part starting after the end of the segment identified by the sequence marker (block 170). For example, the source transceiver module may be configured to redirect the state of the handover data to a network management functional module that is configured to switch control of the target transceiver module so that portions of the transmission placed in the shadow buffer after the end of the segment can be queued in the target module transceiver before handover. Such preloading of the target transceiver module while allowing the source transceiver module to complete its transmission can be very efficient and provide a handover with a short delay time, in particular in a network with a high data rate.

Referring to FIG. 9, in another aspect, a method for performing a session handover in a wireless communication system comprises determining that there are conditions for requesting a handoff of an established communication session from the source transceiver module to the target transceiver module, the determination occurring while receiving the segment ordered the sequence of data packets from the source transceiver module (block 182). For example, an access terminal may include a logical node configured to detect a handover condition based on received pilot intensities of adjacent access points.

The method further includes transmitting a handover request to the target transceiver module based on the determination, wherein the handover request acts to initiate the target transceiver module to receive and queue a portion of the ordered sequence of data packets from the shadow buffer of the functional network module bindings during reception of a segment, the part corresponding to a fragment of an ordered sequence after the segment (block 184). For example, sending a handover request through an access terminal triggers a sequence of actions by which the source transceiver module is notified of the handover request and provides status information before the handover to enable the target transceiver module to collect a queue of data packets outside the end of the segment, at present moment transmitted by the function of the original transceiver.

In addition, the method includes receiving the last transmission corresponding to the segment from the source transceiver module (block 186). For example, the transmission may be an error correction transmission that includes a predetermined number of retransmissions. Instead of wasting time spent on error correction functions, as would be the case if the handover took place immediately, the present aspects use the time gain to complete the transfer by supplying the target transceiver with data so that the handover reduces delay time.

Additionally, the method includes establishing a communication session with the function of the target transceiver after receiving the last transmission from the source transceiver module (block 188). For example, session service of the access terminal is transferred to the target transceiver module as soon as the last transmission is completed.

Additionally, the method includes receiving part of an ordered sequence of data packets from the function of the target transceiver, under the control of the functional network binding module, from the queue without significant delay time after establishing a communication session with the function of the target transceiver (block 190). As noted above, the network binding function previously started loading the target transceiver module with any ordered data after the end of the identified segment. In fact, the target transceiver module achieves highly efficient handoff with a short delay time, especially in a system with a high data transfer rate, where otherwise large queues can gather and require the costly use of relay networks.

10 illustrates a related methodology for transferring a state from a source transceiver to a target transceiver in accordance with an aspect. At block 410, the AT sets the active set by including at least one sector in the active set. Additionally, as a fragment of the establishment of the active set, the AT indicates a desire to include at least one sector in the active set in the AP. At block 420, the AP contacts the desired sector to prepare the desired sector for joining the active set. In particular, if the desired sector agrees to join the active set, the desired sector allocates resources to prepare for communication with the AT. On the other hand, the desired AT may not respond or may reject the request. In any case, in block 430, the AP notifies the AT of the result of an attempt to add the desired sector to the active set. Then, at block 440, changes in the radio connections may be detected by the AT, which may request a change between sectors in the active set. For example, a handover may occur at layer 2, also known as a data / radio link layer of a layered protocol, as described above. Thus, in block 450, the session state is then transmitted from the function of the source transceiver to the function of the target transceiver. Since the sectors in the active set are prepared to receive handoff of a communication session, including AT, TF transmission (for example, for the radio link protocol as a transceiver) is transparent, with a significantly short delay time and quickly (for example, in the range of 20 -40 milliseconds).

When used in this document, the terms "component", "system", etc. they intend to refer to an object related to the use of a computer, whether it is hardware, a combination of hardware and software, software or software during execution and / or electromechanical modules. For example, a component may be, but not limited to, a process running on a processor, a processor, an object, an element, an executable file, a thread of execution, a program, and / or a computer. As an illustration, both an application running on a computer and a computer can be a component. One or more components may reside within a process and / or thread of execution, and the component may be localized on a computer and / or distributed between two or more computers.

The word “exemplary” is used herein to mean “serving as an example, individual case, or illustration.” Any aspect or design described herein as “exemplary” is not necessarily to be construed as preferred or advantageous in comparison with other aspects or constructions. Similarly, the examples provided herein are for the purpose of clarity and understanding only and are not intended to limit the described aspects or part thereof in any way. It will be appreciated that a great number of additional or alternative examples may be presented, but omitted for brevity.

In addition, all or parts of the described aspects can be implemented as a system, method, apparatus or product using standard programming and / or design technologies to create software, hardware-implemented software, hardware or any combination of the above, in order to control a computer in order to implement the disclosed aspects. For example, computer-readable media can include, but not limited to, magnetic storage devices (e.g., hard disk, floppy disk, magnetic tape, etc.), optical disks (e.g., compact disc (CD), universal digital disk (DVD), etc.), smart cards and flash memory devices (for example, card, card, flash drive, etc.). Additionally, it should be appreciated that a carrier wave can be used to carry computer-readable electronic data, such as those used in sending and receiving electronic mail or when accessing a network such as the Internet or a local area network (LAN). Of course, those skilled in the art should recognize that many modifications can be made with respect to this configuration without departing from the scope and spirit of the claimed subject matter.

When the systems and / or methods described herein are implemented in software, hardware-software, middleware or microcode, program code or code segments, they can be stored on a computer-readable medium, such as a data storage component. A code segment can represent a procedure, function, subprogram, program, standard procedure, nested procedure, module, software package, class, or any combination of instructions, data structures, or program statements. A code segment can be paired with another code segment or a hardware circuit by transmitting and / or receiving information, data, arguments, parameters, or memory contents. Information, arguments, parameters, data, etc. can be skipped, sent or transmitted by any appropriate means, including memory sharing, messaging, handoff, network transmission, etc.

When implemented in software, the techniques described in this document can be implemented using modules (for example, procedures, functions, etc.) that perform the functions described in this document. Program codes can be stored in a memory module and executed by processors. The storage module can be implemented in the processor or externally with respect to the processor, and in the second case, it can be functionally paired with the processor using various means.

What is described above includes examples of the disclosed subject matter of the invention. Of course, it is impossible to describe every possible combination of components or technologies in order to describe this subject of the invention, but those skilled in the art may recognize that many additional combinations and permutations are permissible. Therefore, the subject matter of the invention intends to cover all such transformations, modifications and variations that fall within the scope and essence of the attached claims. Moreover, within the framework of how the term “includes” is used in the detailed description or in the claims, this term is intended to be inclusive, similar to the term “contains”, as “contains” is interpreted when applied as a transition word in the claims inventions.

Claims (29)

1. A method of performing handover of a session in a wireless communication system, carried out at an access point of a wireless communication system, comprising the steps of:
- receive an ordered sequence of data packets from the functional network module binding after establishing a communication session with the access terminal, while the communication session is controlled by the functional network module binding, while the functional network module binding contains a shadow buffer configured to store an ordered sequence of data packets for transmission to the access terminal;
- transmit a segment of the ordered sequence of data packets to the access terminal through the session;
- identify the sequence marker corresponding to the end of the segment, as being the point of completion of transmission;
- continue to complete the transfer to the end of the segment; and
- transmit in parallel with the continuation of the transfer, the state of the session handover data to the functional network binding module, wherein the state of the handover data contains the identifier of the target transceiver module and a sequence marker, while the state of the handover data acts to initiate the functional network binding module so as to transmit part of an ordered sequence of data packets to an identified target transceiver module a piece from the shadow buffer until the handover is completed, with the part starting after the end of the segment identified by the sequence marker. 2. The method according to claim 1, in which the continuation of the completion of the transmission further comprises the step of transmitting error correction messages. 3. The method of claim 1, wherein continuing the completion of the transmission further comprises transmitting hybrid automatic retransmission request (HARQ) messages. 4. The method according to claim 1, in which the transfer of service occurs using a functional network binding module that supports session management. 5. The method of claim 1, wherein the transmission comprises a data rate of greater than about 1 Mbps. 6. The method of claim 1, further comprising transmitting a handover response message to a target transceiver module, wherein the handover response message includes final status information, and transmitting the handover message to part of the network management function functional network module binding to complete the transfer of service, while part of the management function of the binding supports session management. 7. The method according to claim 1, additionally containing:
receiving a handover request from a target transceiver module while transmitting a segment of an ordered sequence of data packets to an access terminal through a session. 8. At least one processor configured to perform session handoff in a wireless communication system, comprising:
a first module for receiving an ordered sequence of data packets from the functional network binding module after establishing a communication session with the access terminal, wherein the communication session is controlled by the functional network binding module, while the functional network binding module contains a shadow buffer configured to store the ordered sequence of packets data for transmission to the access terminal;
- a second module for transmitting a segment of an ordered sequence of data packets to the access terminal through a session;
- a third module for identifying a sequence marker corresponding to the end of a segment as being the point of completion of transmission;
- a fourth module to continue transmitting completion to the end of the segment; and
- the fifth module for transmission in parallel with the continuation of the completion of the transfer of the state of the data transfer service session to the functional network module binding, the state of the data transmission service contains the identifier of the target transceiver module and a sequence marker, while the state of the data transmission service acts to initiate a functional network binding module so as to transmit part of an ordered sequence of data packets to the identified module target th transceiver from the shadow buffer until the handover is completed, with the part starting after the end of the segment identified by the sequence marker. 9. A machine-readable medium storing machine-readable instructions that, when executed on a computer, prompts the computer to implement a method for performing a session handoff in a wireless communication system according to claim 1. 10. An access point comprising:
- means for receiving an ordered sequence of data packets from the functional network binding module after establishing a communication session with the access terminal, wherein the communication session is controlled by the functional network binding module, while the functional network binding module contains a shadow buffer configured to store an ordered sequence of data packets for transmission to the access terminal;
- means for transmitting a segment of an ordered sequence of data packets to the access terminal through a session;
- means for identifying a sequence marker corresponding to the end of a segment as being a point of completion of transmission;
- means for continuing transmission completion to the end of the segment; and
- means for transmitting in parallel with the continuation of the completion of the transfer of the state of the session handover data to the functional network binding module, wherein the state of the handoff data contains the identifier of the target transceiver module and a sequence marker, while the state of the handover data acts to initiate the functional network the binding module so as to transmit part of the ordered sequence of data packets to the identified module of the target the transceiver from the shadow buffer until completion of the handover, with the part starting after the end of the segment identified by the sequence marker. 11. An access point comprising:
- a storage device comprising a handover manager module having a sequence determination logical unit;
- a processor in communication with a storage device and configured to execute a handover manager module;
- the source transceiver module, configured to receive an ordered sequence of data packets from the functional network binding module after establishing a communication session with the access terminal, wherein the communication session is controlled by the functional network binding module, while the functional network binding module contains a shadow buffer configured to store an ordered sequence of data packets for transmission to the access terminal;
- while the module of the original transceiver is configured to transmit a segment of an ordered sequence of data packets to the access terminal through a session;
- while the logical node determining the sequence is made with the ability to identify the sequence marker corresponding to the end of the segment, as being the point of completion of transmission;
- while the module of the original transceiver is configured to continue to complete the transmission to the end of the segment; and
- while the source transceiver module is configured to continue to transmit in parallel with the completion of the transmission, the state of the session handover data to the functional network binding module, while the state of the handoff data contains the identifier of the target transceiver module and a sequence marker, while the state of the transmission data service acts to initiate a functional network binding module so as to transmit part of an ordered last the sequence of data packets to the identified module of the target transceiver from the shadow buffer until completion of the handover, the part starts after the end of the segment identified by the sequence marker. 12. The access point according to claim 11, in which the transmission further comprises error correction messages. 13. The access point according to claim 11, in which the transmission further comprises messages hybrid automatic request for retransmission (HARQ). 14. The access point according to claim 11, in which the transfer of service occurs using a functional network module binding, supporting session management. 15. The access point according to claim 11, in which the transmission contains a data rate of more than approximately 1 Mbit / s. 16. The access point according to claim 11, in which the source transceiver module is configured to transmit a handover response message to the target transceiver module, wherein the handover response message includes final status information, and transmit the handover message to a part network management functions of the functional network binding module to complete the handover, while part of the binding management function supports session management. 17. The access point according to claim 11, in which the source transceiver module is configured to receive a handover request from the target transceiver module while transmitting a segment of an ordered sequence of data packets to the access terminal through a session. 18. A method for performing a session handover in a wireless communication system, comprising the steps of:
- determine that there are conditions for requesting a handoff of an established communication session from the source transceiver module to the target transceiver module, the determination occurring during reception of a segment of an ordered sequence of data packets from the source transceiver module;
- transmit the handover request to the target transceiver module based on the determination, wherein the handover request is valid to initiate the target transceiver module so as to receive and queue a portion of the ordered sequence of data packets from the shadow buffer of the functional network binding module during reception segment and to complete the transfer of service, while the part corresponds to a fragment of an ordered sequence after the segment;
- receive the last gear corresponding to the segment from the module of the original transceiver;
- establish a communication session with the function of the target transceiver after receiving the last transmission from the module of the original transceiver; and
- take part of the ordered sequence of data packets from the function of the target transceiver under the control of the functional network binding module from the queue without a significant delay time after establishing a communication session with the function of the target transceiver. 19. The method of claim 18, wherein the receiving segment further comprises receiving an error correction message. 20. The method of claim 18, wherein the receiving segment further comprises receiving a hybrid automatic retransmission request (HARQ) message. 21. The method of claim 18, wherein the handover is performed using a functional network binding module supporting session management. 22. The method of claim 18, wherein the transmission comprises a data rate of greater than about 1 Mbps. 23. At least one processor for performing session handoff in a wireless communication system, comprising:
- a first module for determining that there are conditions for requesting a handoff of an established communication session from the source transceiver module to the target transceiver module, the determination being made while receiving a segment of an ordered sequence of data packets from the source transceiver module;
- a second module for transmitting a handover request to the target transceiver module based on the determination, wherein the handover request is valid to initiate the target transceiver module to receive and queue a portion of the ordered sequence of data packets from the shadow buffer of the functional network binding module during the reception of the segment and before the completion of the handover, the part corresponds to a fragment of an ordered sequence after the segment;
- a third module for receiving the last transmission corresponding to the segment from the module of the original transceiver;
- a fourth module for establishing a communication session with the function of the target transceiver after receiving the last transmission from the module of the original transceiver; and
- in this case, the third module further receives a part of the ordered sequence of data packets from the function of the target transceiver under the control of the functional network binding module from the queue without a significant delay time after establishing a communication session with the function of the target transceiver. 24. A machine-readable medium storing computer-readable instructions that, when executed on a computer, prompts the computer to implement a method for performing a handover of a session in a wireless communication system according to claim 18. 25. An access terminal comprising:
- means for determining that there are conditions for requesting a handoff of an established communication session from the source transceiver module to the target transceiver module, the determination being made while receiving a segment of an ordered sequence of data packets from the source transceiver module;
- means for transmitting a handover request to the target transceiver module based on the determination, wherein the handover request acts to initiate the target transceiver module to receive and queue a portion of the ordered sequence of data packets from the shadow buffer of the functional network binding module into the time of reception of the segment and before the completion of the handover, the part corresponding to a fragment of an ordered sequence after the segment;
- means for receiving the last transmission corresponding to the segment from the module of the original transceiver;
- means for establishing a communication session with the function of the target transceiver after receiving the last transmission from the module of the original transceiver; and
- means for receiving part of an ordered sequence of data packets from the function of the target transceiver under the control of the functional network module binding from the queue without a significant delay time after establishing a communication session with the function of the target transceiver. 26. A method for performing a session handover by a network-side system in a wireless communication system, comprising the steps of:
- control the communication session of the access terminal with the module of the original transceiver;
- transmit to the source transceiver module an ordered sequence of data packets intended for the access terminal;
- copy the ordered sequence of data packets into a shadow buffer, configured to store an ordered sequence of data packets;
- receive, by the source transceiver module, a handover request from the target transceiver module during the transmission of a segment of an ordered sequence of data packets to the access terminal through a session;
- identify, using the module of the original transceiver, the marker of the sequence corresponding to the end of the segment, as being the point of completion of the transmission;
- continue to complete the transmission through the source transceiver module to the end of the segment;
- transmit in parallel with the continuation of the completion of the transmission by the source transceiver module the state of the session handover data to the functional network binding module, while the state of the handoff data contains the identifier of the target transceiver module and the sequence marker;
- transmit through the functional network binding module and in response to receiving the state of the handover data and before the handover is completed, part of the ordered sequence of data packets to the identified target transceiver module from the shadow buffer, and the part starts after the end of the segment identified by the sequence marker; and
- receive, by means of a functional network binding module, packet data coming from the access terminal during transmission of a part of the ordered sequence of data packets from the source transceiver module. 27. The method according to p, in which the sequence marker provides the ability to track partial data packets. 28. A system for performing handover of a session of a wireless communication system, comprising:
- a functional network binding module having a corresponding shadow buffer, while the functional network binding module is configured to control the communication session of the access terminal with the source transceiver module, while the functional network binding module is configured to transmit an ordered sequence of data packets intended for the source transceiver module for the access terminal, while the functional network binding module is additionally configured to copy acce ordered sequence of data packets in the shadow buffer that is adapted to store an ordered sequence of data packets;
- while the source transceiver module is configured to receive a handover request from the target transceiver module during the transmission of a segment of an ordered sequence of data packets to the access terminal by means of a session, the source transceiver module is able to identify the sequence marker corresponding to the end of the segment as being the point of completion of the transmission, while the module of the original transceiver is configured to continue issuing Transmit through the source transceiver module to the end of the segment;
- while the source transceiver module is configured to transmit in parallel with the continuation of the transmission, the state of the session handover data to the functional network binding module, while the state of the handoff data contains the identifier of the target transceiver module and a sequence marker;
- at the same time, the functional network binding module in response to receiving the state of the data on the handover and until the handover is completed is configured to transmit part of the ordered sequence of data packets to the identified module of the target transceiver from the shadow buffer, with the part starting after the end of the segment identified by the marker sequences; and
- at the same time, the functional network binding module is configured to receive packet data from the source transceiver module coming from the access terminal during transmission of a part of the ordered sequence of data packets. 29. The system of claim 28, wherein the sequence marker provides the ability to track partial data packets.

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