KR101559126B1 - Evolution-Data Optimized (EVDO) session handling during mobility with support for S101 signaling interface - Google Patents

Abstract

Certain aspects of the disclosure suggest techniques for handling Evolution-Data Optimized (EVDO) sessions during inter radio access technology (IRAT) movement through support for the S101 signaling interface. While the UE has an EVDO session, the UE may determine a mobility scenario for movement of the UE between the first cell and the second cell. The UE may further determine whether pre-registration of the UE EVDO session is allowed via the S101 signaling interface. The UE may perform procedures related to the EVDO session based on the determined mobility scenario and whether pre-registration is allowed or not allowed.

Description

(EVDO) session handling during mobility with support for the S101 signaling interface.

35 Priority claim under U.S.C. §119

This patent application is a continuation of the "Evolution-Data Optimized (EVDO) Session Handling during Mobility with Support for S101 Signaling Interface " filed on October 3, 2011, assigned to the assignee hereof and expressly incorporated herein by reference. Quot; U.S. Provisional Patent Application No. 61 / 542,771.

Certain aspects of the disclosure relate generally to wireless communications, and more particularly, to Evolution-Data Optimized (EVDO) during movement (e.g., inter radio access technology (IRAT) movement) through support for the S101 signaling interface ≪ / RTI > session processing.

Wireless communication systems are widely deployed to provide various types of communication content, e.g., voice, data, and so on. These systems may be multi-access systems capable of supporting communication with multiple users by sharing available system resources (e.g., bandwidth and transmit power). Examples of such multiple access systems are Code Division Multiple Access (CDMA) systems, Time Division Multiple Access (TDMA) systems, Frequency Division Multiple Access (FDMA) systems, Third Generation Partnership Project (3GPP) Long Term Evolution ) Systems, and orthogonal frequency division multiple access (OFDMA) systems.

Generally, a wireless multiple-access communication system can simultaneously support communication for multiple wireless terminals. Each terminal communicates with one or more base stations via transmissions on the forward link and the reverse link. The forward link (or downlink) refers to the communication link from the base stations to the terminals, and the reverse link (or uplink) refers to the communication link from the terminals to the base stations. The forward communication link and the reverse communication link may be established through a single-input single-output, multiple-input single-output or multiple-input multiple-output system.

A wireless multiple-access communication system may support Time Division Duplex (TDD) and Frequency Division Duplex (FDD) systems. In TDD systems, forward and reverse link transmissions occur on the same frequency domain, so that the reciprocity principle allows estimation of the forward link channel from the reverse link channel. This allows the access point to extract the transmit beam-forming gain on the forward link when multiple antennas are available at the access point.

3GPP LTE represents an important advance in cellular technology, which is the next step in cellular 3G (3G) services as a natural progression to Global System for Mobile Communications (GSM) and Universal Mobile Telecommunications System (UMTS). LTE provides uplink speeds up to 75 Mbps (megabits per second) and downlink speeds up to 300 Mbps and provides numerous technological advantages to cellular networks. LTE is designed to meet carrier requirements for high-capacity voice support as well as high-speed data and media transport. The bandwidth is scalable from 1.25 MHz to 20 MHz. This is appropriate for the requirements of different network operators with different bandwidth allocations and also allows operators to provide different services based on spectrum. LTE is also expected to allow carriers to provide more data and voice services over a given bandwidth, thereby improving spectral efficiency in 3G networks.

The physical layer (PHY) of the LTE standard is a very efficient means of carrying both data and control information between an enhanced base station (eNodeB) and a mobile user equipment (UE). LTE PHY employs new advanced technologies for cellular applications. These include Orthogonal Frequency Division Multiplexing (OFDM) and Multiple Input Multiple Output (MIMO) data transmission. The LTE PHY also uses OFDMA on the downlink and single carrier-frequency division multiple access (SC-FDMA) on the uplink. OFDMA allows data to be directed to or from multiple users on a subcarrier-by-subcarrier basis for a specified number of symbol periods.

Certain aspects of the present disclosure provide methods for wireless communications. The method includes the steps of: determining a mobility scenario for the transfer of the UE between a first cell and a second cell, typically while the user equipment (UE) has an Evolution-Data Optimized (EVDO) session; Determining whether pre-registration of the UE EVDO session via the S101 interface is allowed; And performing a procedure associated with the EVDO session based on the determined mobility scenario and whether the pre-registration is allowed.

In the manner in which the above-recited features of the disclosure can be understood in detail, a more particular description briefly summarized above may be made with reference to the aspects, some of which are illustrated in the accompanying drawings. It should be noted, however, that the appended drawings illustrate only certain typical aspects of the disclosure, and should not be regarded as limiting the scope of the disclosure, as the description above allows for other equally effective aspects It is because.
1 is a block diagram conceptually illustrating an example of a wireless communication network, in accordance with certain aspects of the disclosure.
2 is a block diagram conceptually illustrating an example of a frame structure in a wireless communication network, in accordance with certain aspects of the disclosure.
2A illustrates an exemplary format for an uplink in Long Term Evolution (LTE), in accordance with certain aspects of the disclosure.
3 illustrates a block diagram conceptually illustrating an example of an eNode B communicating with a user equipment device (UE) in a wireless communication network, in accordance with certain aspects of the present disclosure.
4 illustrates an exemplary network architecture for UE handover between Evolved High Rate Packet Data (eHRPD) and Long Term Evolution (LTE) with S101 support, according to certain aspects of the disclosure.
5 illustrates an exemplary eHRPD pre-registration in an LTE cell that allows eHRPD pre-registration for the UE, according to certain aspects of the disclosure.
6A illustrates a table illustrating exemplary EVDO session processing when moving to or from an E-UTRAN, in accordance with certain aspects of the disclosure.
FIG. 6B illustrates a table 600B illustrating EVDO session processing when moving from eHRPD to pre-registration allowed LTE, according to certain aspects of the disclosure.
FIG. 7 illustrates a table illustrating exemplary EVDO session processing during E-UTRAN-eHRPD movement, in accordance with certain aspects of the disclosure.
8 illustrates exemplary operations by a UE for performing session processing during movement of a user equipment (UE), in accordance with certain aspects of the disclosure.

 The techniques described herein may be used for various wireless communication networks such as CDMA, TDMA, FDMA, OFDMA, SC-FDMA and other networks. The terms "network" and "system" are often used interchangeably. A CDMA network may implement radio technologies such as Universal Terrestrial Radio Access (UTRA), cdma2000, and the like. UTRA includes Wideband CDMA (WCDMA) and other variants of CDMA. CDMA2000 covers IS-2000, IS-95, and IS-856 standards. The TDMA network may implement radio technologies such as Global System for Mobile Communications (GSM). The OFDMA network may implement radio technologies such as Evolved UTRA (UTRA), Ultra Mobile Broadband (UMB), Wi-Fi, IEEE 802.16 (WiMAX), IEEE 802.20, and Flash-OFDM®. UTRA and E-UTRA are part of the Universal Mobile Telecommunication System (UMTS). 3GPP Long Term Evolution (LTE) and LTE-Advanced (LTE-A) are new releases of UMTS using E-UTRA. UTRA, E-UTRA, UMTS, LTE, LTE-A and GSM are described in documents from an organization named "Third Generation Partnership Project (3GPP)". CDMA2000 and UMB are described in documents from the organization entitled " 3rd Generation Partnership Project 2 (3GPP2) ". The techniques described herein may be used for the wireless networks and radio techniques described above as well as for other wireless networks and radio techniques. For clarity, certain aspects of the techniques are described below for LTE, and LTE terminology is used in most of the descriptions below.

Exemplary wireless network

Figure 1 illustrates a wireless communication network 100 that may be an LTE network. The wireless network 100 may include a plurality of these bulged node B (eNBs) 110 and other network entities. The eNB may be a station that communicates with user equipment devices (UEs), and may also be referred to as a base station, a Node B, an access point, and so on. Each eNB 110 may provide communication coverage for a particular geographic area. In 3GPP, the term "cell" may refer to an eNB subsystem that serves the coverage area of the eNB and / or its coverage area, depending on the context in which the term is used.

The eNB may provide communication coverage for macro cells, picocells, femtocells, and / or other types of cells. The macrocell may cover a relatively wide geographic area (e.g., a few kilometers in radius) and may allow unrestricted access by UEs subscribed to the service. A picocell can cover a relatively small geographical area and allow unrestricted access by UEs subscribed to the service. The femtocell may cover relatively small geographic areas (e.g., assumptions), and may include UEs in association with a femtocell (e.g., UEs in a closed subscriber group (CSG) RTI ID = 0.0 > UEs < / RTI > The eNB for a macro cell may be referred to as a macro eNB (e.g., macro base station). The eNB for a picocell may be referred to as a pico eNB (e.g., pico base station). An eNB for a femtocell may be referred to as a femto eNB (e.g., femto base station) or a home eNB. In the example shown in Figure 1, the eNBs 110a, 110b, and 110c may be macro eNBs for the macrocells 102a, 102b, and 102c, respectively. The eNB 110x may be a pico eNB for the pico cell 102x. The eNBs 110y and 110z may be femto eNBs for the femtocells 102y and 102z, respectively. The eNB may support one or more (e.g., three) cells.

The wireless network 100 may also include relay stations. A relay station is a station that receives a transmission of data and / or other information from an upstream station (e.g., an eNB or UE) and transmits a transmission of data and / or other information to a downstream station (e.g., a UE or an eNB) to be. The relay station may also be a UE that relays transmissions to other UEs. In the example shown in Figure 1, relay station 110r may communicate with eNB 110a and UE 120r to facilitate communication between eNB 110a and UE 120r. The relay station may also be referred to as a relay eNB, a relay, or the like.

The wireless network 100 may be a heterogeneous network (HetNet) that includes different types of eNBs, e.g., macro eNBs, pico eNBs, femto eNBs, repeaters, and the like. These different types of eNBs may have different transmission power levels in the wireless network 100, different coverage areas, and different influences on interference. For example, macro eNBs may have a high transmit power level (e.g., 20 watts) while pico eNBs, femto eNBs, and repeaters may have a lower transmit power level (e.g., 1 watt) have.

The wireless network 100 may support synchronous or asynchronous operation. For synchronous operation, the eNBs may have similar frame timing, and transmissions from different eNBs may be roughly aligned in time. For asynchronous operation, the eNBs may have different frame timings, and transmissions from different eNBs may not be aligned in time. The techniques described herein may be used for both synchronous or asynchronous operations.

Network controller 130 may be coupled to a set of eNBs to provide coordination and control for these eNBs. The network controller 130 may communicate with the eNBs 110 via a backhaul. eNBs 110 may also communicate with each other indirectly or directly via, for example, wireless or wired backhaul.

The UEs 120 may be distributed throughout the wireless network 100, and each UE may be stationary or mobile. A UE may also be referred to as a terminal, a mobile station, a subscriber unit, a station, and so on. The UE may be a cellular phone, a personal digital assistant (PDA), a wireless modem, a wireless communication device, a handheld device, a laptop computer, a cordless telephone, a wireless local loop (WLL) station, have. The UE may be capable of communicating with macro eNBs, pico eNBs, femto eNBs, repeaters, and the like. In Figure 1, a solid line with double arrows represents the desired transmissions between the UE and the serving eNB, which is the eNB designated to serve the UE on the downlink and / or uplink. The dotted line with double arrows indicates the interfering transmissions between the UE and the eNB. In certain aspects, the UE may include an LTE Release 10 UE.

LTE uses orthogonal frequency division multiplexing (OFDM) on the downlink and single carrier frequency division multiplexing (SC-FDM) on the uplink. OFDM and SC-FDM divide the system bandwidth into multiple (K) orthogonal subcarriers, which are also often referred to as tones, bins, and the like. Each subcarrier may be modulated with data. In general, modulation symbols are transmitted by OFDM in the frequency domain and by SC-FDM in the time domain. The spacing between adjacent subcarriers may be fixed and the total number K of subcarriers may depend on the system bandwidth. For example, K may be equal to 128, 256, 512, 1024, or 2048, respectively, for a system bandwidth of 1.25, 2.5, 5, 10, or 20 megahertz (MHz). The system bandwidth can also be divided into subbands. For example, the subband may cover 1.08 MHz and there may be 1, 2, 4, 8 or 16 subbands, respectively, for a system bandwidth of 1.25, 2.5, 5, 10 or 20 MHz.

2 shows a frame structure used in LTE. The transmission timeline for the downlink may be divided into units of radio frames. Each radio frame may have a predetermined duration (e.g., 10 milliseconds (ms)) and may be divided into 10 subframes with indices of 0 to 9. Each subframe may include two slots. Thus, each radio frame may comprise 20 slots with indices of 0 to 19. Each slot contains L symbol periods, e.g., L = 7 symbol periods for a regular periodic prefix (as shown in FIG. 2) or L = 6 symbol periods for an extended periodic prefix can do. Indexes of 0 to 2L-1 may be allocated to 2L symbol periods of each subframe. The available time frequency resources may be divided into resource blocks. Each resource block may cover N subcarriers (e.g., 12 subcarriers) in one slot.

In LTE, the eNB may transmit a primary synchronization signal (PSS) and a secondary synchronization signal (SSS) for each cell of the eNB. The primary synchronization signal and the secondary synchronization signal are transmitted in symbol period 6 and symbol period 5 in subframes 0 and 5, respectively, of each radio frame having a regular periodic prefix, as shown in FIG. 2 . The synchronization signals may be used by the UEs for cell detection and acquisition. The eNB may transmit a physical broadcast channel (PBCH) in symbol periods 0 to 3 in slot 1 of subframe 0. The PBCH can carry specific system information.

The eNB may transmit a Physical Control Format Indicator Channel (PCFICH) in the first symbol period of each subframe, as shown in FIG. The PCFICH may carry the number of symbol periods (M) used for the control channels, where M may be equal to 1, 2, or 3 and may be different for each subframe. M may also be equal to 4 for a small system bandwidth having fewer than 10 resource blocks, for example. the eNB may transmit a Physical HARQ Indicator Channel (PHICH) and a Physical Downlink Control Channel (PDCCH) in the first M symbol periods of each subframe Not). The PHICH may transmit information to support a hybrid automatic repeat request (HARQ). The PDCCH may convey information about resource allocation for UEs and control information for downlink channels. The eNB may transmit a Physical Downlink Shared Channel (PDSCH) in the remaining symbol periods of each subframe. The PDSCH may carry data for the scheduled UEs for data transmission on the downlink. Various signals and channels in LTE are described in 3GPP TS 36.211 entitled " Evolved Universal Terrestrial Radio Access (E-UTRA); Physical Channels and Modulation ".

The eNB may transmit PSS, SSS and PBCH at 1.08 MHz, the center of the system bandwidth used by the eNB. The eNB may transmit these channels over the entire system bandwidth in each symbol period during which the PCFICH and PHICH are transmitted. The eNB may send the PDCCH to groups of UEs in specific parts of the system bandwidth. The eNB may send the PDSCH to specific UEs in certain parts of the system bandwidth. The eNB may transmit PSS, SSS, PBCH, PCFICH and PHICH to all UEs in a broadcast manner, may transmit a PDCCH to specific UEs in a unicast manner, and may transmit PDSCHs to specific UEs in a unicast manner It is possible.

Multiple resource elements may be available in each symbol period. Each resource element may cover one carrier in one symbol period and may be used to transmit one modulation symbol, which may be a real or complex value. In each symbol period, resource elements that are not used in the reference signal can be arranged into resource element groups (REGs). Each REG may include four resource elements in one symbol period. The PCFICH can occupy four REGs that can be spaced approximately evenly across the frequency in symbol period 0. [ The PHICH may occupy three REGs that can be spread over frequency in one or more configurable symbol periods. For example, all three REGs for the PHICH may belong to symbol period 0 or may be spread over symbol periods 0, 1 and 2. The PDCCH may occupy, for example, 9, 18, 36 or 72 REGs, which may be selected from the REGs available in the first M symbol periods. Only certain combinations of REGs may be allowed for the PDCCH.

The UE may recognize specific REGs used for PHICH and PCFICH. The UE may search for different combinations of REGs for the PDCCH. The number of combinations to be searched is typically less than the number of combinations allowed for the PDCCH. The eNB may send the PDCCH to the UE in any combination of combinations to be searched by the UE.

2A shows an exemplary format 200A for the uplink in LTE. The resource blocks available for the uplink may be divided into a data section and a control section. The control section may be formed at two edges of the system bandwidth and may have a configurable size. Control section resource blocks may be assigned to the UEs for transmission of control information. The data section may include all resource blocks not included in the control section. The design of FIG. 2a yields a data section comprising adjacent subcarriers, which may cause a single UE to be allocated all of the adjacent subcarriers of the data section.

The resource blocks of the control section may be assigned to the UE to transmit control information to the eNB. Also, the resource blocks of the data section may be allocated to the UE to transmit data to the eNB. The UE may transmit control information of a physical uplink control channel (PUCCH) 210a, 210b on the allocated resource blocks of the control section. The UE may transmit only data of the Physical Uplink Shared Channel (PUSCH) 220a or 220b on the allocated resource blocks of the data section or both data and control information. The uplink transmission may span both slots of the subframe as shown in FIG. 2A and may hop across the frequency.

The UE may be within the coverage of multiple eNBs. One of these eNBs may be selected to serve the UE. The serving eNB may be selected based on various criteria such as received power, path loss, signal-to-noise ratio (SNR), and the like.

The UE may operate in a dominant interference scenario in which the UE can observe high interference from one or more interfering eNBs. The dominant interference scenarios can be caused by limited associations. For example, in FIG. 1, UE 120y may be close to femto eNB 110y and may have high receive power for eNB 110y. However, UE 120y may not be able to access femto eNB 110y due to limited association and may then be unable to access macro eNB 110c with lower received power (as shown in Figure 1) May be connected to the femto eNB 110z (not shown in Fig. 1) having a lower received power. UE 120y may then observe high interference from femto eNB 120y on the downlink and may also cause high interference on eNB 110y on the uplink.

A dominant interference scenario may also occur due to range expansion, which is the scenario of connecting UEs to eNBs with lower path loss and lower SNR among all eNBs detected by the UE. For example, in FIG. 1, UE 120x may detect macro eNB 110b and pico eNB 110x and may have lower received power for eNB 110x than eNB 110b. Nevertheless, it may be desirable to connect UE 120x to pico eNB 110x if the path loss for eNB 110x is lower than the path loss for macro eNB 110b. This may cause less interference to the wireless network for a given data rate for UE 120x.

In an aspect, communication in a dominant interference scenario may be supported by allowing different eNBs to operate on different frequency bands. A frequency band is a range of frequencies that can be used for communication and can be given as (i) center frequency and bandwidth, or (ii) lower and upper frequencies. The frequency band may also be referred to as a band, a frequency channel, or the like. The frequency bands for different eNBs may be selected such that in a dominant interference scenario the UE can communicate with the weaker eNB while the strong eNB can communicate with its UEs. The eNB may be classified as a "weak" eNB or a "strong" eNB based on the received power of signals from the eNB received at the UE.

According to certain aspects of the present disclosure, if the network supports enhanced inter-cell interference coordination (eICIC), the base stations may abandon some of their resources to reduce or eliminate interference by interfering cells You can negotiate with each other to coordinate resources. According to this interference coordination, by using the resources yielded by the interfering cell, the UE may be able to access the serving cell even with significant interference.
For example, in a coverage area of an open macrocell, a femtocell with a closed access mode (e.g., only a member femto UE can access the cell) yields resources and effectively removes interference, Quot; coverage hole "(in the coverage area of the femtocell). By negotiating the femtocell to yield the resources, the macro UE under the femtocell coverage area may still be able to access the serving macrocell of the UE using these reserved resources.

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In a radio access system using OFDM, such as Evolved Universal Terrestrial Radio Access Network (E-UTRAN), the yielded resources may be time-based, frequency-based, or a combination of the two. If the coordinated resource partitioning is time-based, the interfering cell may not simply use some of the subframes in the time domain. If the coordinated resource partitioning is frequency based, the interfering cell may yield subcarriers in the frequency domain. With a combination of frequency and time, the interfering cell can yield frequency and time resources.

3 is a block diagram of a design of a base station or eNB 110 and UE 120, which may be one of the base stations / eNBs and the UEs of Fig. For a limited association scenario, the eNB 110 may be the macro eNB 110c of FIG. 1 and the UE 120 may be the UE 120y. eNB 110 may also be some other type of base station. eNB 110 may be equipped with T antennas 334a through 334t and UE 120 may be equipped with R antennas 352a through 352r where T? 1 and R? 1 to be.

At the eNB 110, the transmit processor 320 may receive data from the data source 312 and control information from the controller / processor 340. The control information may be for PBCH, PCFICH, PHICH, PDCCH, and the like. The data may be for a PDSCH or the like. Transmit processor 320 may process (e.g., encode and symbol map) data and control information to obtain data symbols and control symbols, respectively. Transmit processor 320 may also generate reference symbols for, for example, PSS, SSS and cell-specific reference signals. (TX) multiple-input multiple-output (MIMO) processor 330 performs spatial processing (e.g., precoding) on data symbols, control symbols, and / , And may provide T output symbol streams to T modulators (MODs) 332a through 332t. Each modulator 332 may process each output symbol stream (e.g., for OFDM, etc.) to obtain an output sample stream. Each modulator 332 may further process (e.g., convert to analog, amplify, filter, and upconvert) the output sample stream to obtain a downlink signal. The T downlink signals from the modulators 332a through 332t may be transmitted via the T antennas 334a through 334t, respectively.

At UE 120, antennas 352a through 352r may each receive downlink signals from eNB 110 and provide received signals to demodulators (DEMODs) 354a through 354r . Each demodulator 354 can condition (e.g., filter, amplify, downconvert, and digitize) each received signal to obtain input samples. Each demodulator 354 may further process the input samples (e.g., for OFDM, etc.) to obtain the received symbols. MIMO detector 356 may obtain received symbols from all R demodulators 354a through 354r and, if available, perform MIMO detection on received symbols to provide detected symbols. Receive processor 358 processes (e.g., demodulates, deinterleaves, and decodes) the detected symbols, provides decoded data for UE 120 to data sink 360, and provides decoded control information Controller / processor 380. The controller /

On the uplink, at the UE 120, the transmit processor 364 receives data (e.g., for the PUSCH) from the data source 364 and data from the controller / processor 380 (e.g., for the PUCCH) Lt; RTI ID = 0.0 > control information. ≪ / RTI > The transmit processor 364 may also generate reference symbols for the reference signal. The symbols from transmit processor 364 are precoded by TX MIMO processor 366 when available and further processed by modulators 354a through 354r (e.g., for SC-FDM, etc.) eNB < / RTI > At eNB 110, the uplink signals from UE 120 are received by antennas 334, processed by demodulators 332, detected by MIMO detector 336 if available, May be further processed by the processor 338 to obtain decoded data and control information transmitted by the UE 120. [ The receive processor 338 may provide decoded data to the data sink 339 and decoded control information to the controller /

Controllers / processors 340 and 380 may direct operation at eNB 110 and UE 120, respectively. The modules in controller / processor 340, receive processor 338, and / or other processors 320, 330, 358, 380, 366, 364 and eNB 110 and / / RTI > processes and / or operations for the disclosed techniques. Memories 342 and 382 may store data and program codes for eNB 110 and UE 120, respectively. Scheduler 344 may schedule the UEs for data transmissions on the downlink and / or the uplink.

Example Techniques for EVDO Session Processing During IRAT Movement by Support for the S101 Signaling Interface [

4 illustrates an exemplary network architecture 400 in which UE handover between eHRPD (Evolved High Rate Packet Data) and LTE (Long Term Evolution) can be performed by S101 support, in accordance with certain aspects of the present disclosure For example.

Reference numeral 402 is a 3GPP LTE (Long Term Evolution) / E-UTRAN (Evolved Universal Terrestrial Radio Access) part of the network 400, reference numeral 404 is a ^{3GPP2 (3 rd Generation Partnership Project 2} ) of the network (400) . Evolved High Rate Packet Data (EHRPD) and High Rate Packet Data (HRPD) are considered 3gpp2 evolution-data optimized (EVO) RATs (Radio Access Technologies). In certain aspects, when a device such as a UE moves from one RAT to another RAT, it may be possible for a device, such as a UE, to maintain IP continuity when two RATs are connected to the same core network. For example, a UE moving between EVDO and 1x can maintain continuity. Moving between RATs connected to the same core network can be transparent to applications because the device can have the same IP address on the new RAT.

In certain aspects, for UEs moving between LTE and EHRPD, both LTE and EHRPD RAT (Radio Access Technologies) are connected to the same 3 gpp (EPC (Evolved Packet Core) core network) IP continuity can be maintained. The serving gateway (SGW) 406 for LTE and the HRPD serving gateway (HSGW) 408 for EHRPD may assign an IP address to the device after obtaining the IP address from the PDN gateway 410. The three entities, SGW 406, HSGW 408, and PDN 410 may be considered part of the EPC core network.

S101 is a signaling interface between the EPC Mobility Management Entity (MME) 412 and the eHRPD Access Network (eAN) 414, which performs UE tunneling during eHRPD pre-registration and operation in the LTE radio interface (e.g., a radio session and a data session including a Point-to-Point (PPP) / Internet Protocol (IP) / Quality of Service) for eHRPD through tunneling . With the S101 supported, when the UE moves from LTE to eHRPD, the UE can save signaling / time to set up the context before initiating / continuing data transfer over eHRPD.

Figure 5 illustrates exemplary eHRPD pre-registration in an LTE cell that allows eHRPD pre-registration for the UE, according to certain aspects of the disclosure. Reference numeral 502 denotes an LTE footprint and reference numeral 504 denotes an eHRPD footprint. As shown, the UE 506 may perform eHRPD pre-registration within an LTE cell (or a zone of an LTE cell) that allows pre-registration. In one aspect, typically, pre-registration involves creating and maintaining an eHRPD session over the S101 tunnel interface and creating and maintaining PPP / IP / QoS contexts via eHRPD. Thus, typically, when an actual handoff to eHRPD occurs, the UE has all of the contexts required for eHRPD.

In certain aspects, not all of the LTE cells allow the UE to perform pre-registration. Usually, to reduce unnecessary eHRPD signaling to maintain context, the operator will enable the UE to perform pre-registration at the boundary of LTE coverage (e.g., the LTE footprint boundary as shown). Therefore, when S101 is deployed in the network, only a portion of LTE coverage may allow the UE to perform pre-registration. As a result, even when the S101 is supported by the network, new mobility scenarios may occur when the UE moves between eHRPD and / or LTE regions that allow pre-registration and / or LTE regions that do not allow pre-registration .

For example, these scenarios may be used when a UE moves from an eHRPD cell to an LTE cell that allows pre-registration, when the UE moves from an LTE cell that allows pre-registration to an eHRPD cell, and / When moving from an LTE cell to an eHRPD cell.

Another set of mobility scenarios occurs when the UE is moving within LTE coverage. For example, these scenarios may include a handoff (e.g., idle handoff) from one LTE cell that allows pre-registration to another LTE cell (the same pre-registration zone) that allows pre-registration, Handoff from one LTE cell to another LTE cell (another pre-registration zone) that allows pre-registration, handoff from one LTE cell that allows pre-registration to another LTE cell that does not allow pre-registration, Handoff from one LTE cell that does not allow pre-registration to another LTE cell that allows pre-registration, and another LTE cell that does not allow pre-registration from one LTE cell that allows pre-registration and then RTI ID = 0.0 > eHRPD. ≪ / RTI >

In certain aspects, when the UE is moving within LTE coverage, the UE can not have eHRPD overhead information, and therefore, in order to determine how to handle an existing EVDO session, May be dependent on one or more LTE parameters such as pre-registration zone ID (which may be the same). Typically, the eHRPD overhead information includes the signaling that the network / base station provides to the UE. Typically, the signaling includes a subnet mask and a sector ID, and the subnet mask and sector ID can be used to compute a unique subnet ID, which uniquely identifies the subnet, Lt; RTI ID = 0.0 > UE < / RTI > to the target eAN. Similar to subnet IDs, zone IDs / color codes may also be used to identify subnets. However, the zone IDs / color codes are not unique across the network and can be reused to identify multiple subnets. Thus, the zone IDs / color codes are not always able to identify the correct subnet.

In some cases, pre-registration zone ID / color codes and subnet IDs are not 1: 1 mapped. Thus, if the UE performs a Unicast Access Terminal Identifier (UATI) update procedure instead of restoring a Data Optimized (DO) session, the network can not recognize the UE / AT and the current DO session is sent to the network , Which will cause data service interruption.

In certain aspects, if the UE performs the UATI procedure instead of restoring the DO session, the network may retrieve the session based on the color code provided by the UE via the UATI update procedure. Since the color code is not unique across the eHRPD network, the network can retrieve the wrong session for the UE.

In certain aspects, the UE may remain in its non-activated tunnel mode while in the LTE cell allowing pre-registration. For example, the UE may maintain the current session when opening a new session supporting the tunnel mode operation, or the UE may do nothing when it must restore the session as a way to activate the tunnel.

In certain aspects, the UE may assume the unnecessary wireless signaling to the EVDO session negotiation and / or the UATI update procedure. For example, the UE may perform a UATI update when there is no need to do anything.

Therefore, it is necessary to define how the UE handles EVDO sessions in different mobility scenarios.

In certain aspects, the UE may determine whether or not to perform EVDO session related procedures, and whether a particular mobility scenario (e.g., source / target RAT, whether the LTE cell allows pre-registration, Change detection) to determine which procedure is to be performed. In certain aspects, the UEs may be configured to discard the current EVDO radio session (e.g., not allowing S101 tunneling) and to open a new EVDO radio session (e.g., allowing S101 tunneling) It may be necessary to decide to perform one or more of a set of various actions, such as attempting to restore the radio session, performing a UATI update procedure, or doing nothing.

6A illustrates a table 600A showing an exemplary EVDO session processing when moving into or out of E-UTRAN, in accordance with certain aspects of the disclosure. In certain exemplary scenarios, the UE may have a DO session that has not timed out. Each index 602 represents a mobility scenario. Column 604 represents the source cell of the RAT (e.g., LTE or eHRPD) and the UE moves from the source cell. If the RAT associated with the source cell 604 is LTE, then the corresponding source cell field also shows whether it supports pre-registration or does not support pre-registration. Column 606 represents an LTE target cell, and the UE moves to the LTE target cell. Each field in the target cell column 606 also provides information (e.g., via the S101 tunneling interface) about whether the LTE cell supports pre-registration or not. Reference numeral 608 denotes an idle mobility scenario and indicates available idle mobility (including cell reselection, cell redirection, out-of-service (OOS) Information about the procedures, and other information including a buffer status report (BSR). Reference numeral 610 denotes the UE behavior based on the source cell 604, the target cell 606 and the idle mobility scenario 608. [

Index 1 discusses the scenario when the UE moves from an LTE cell that supports pre-registration to another LTE cell that also supports pre-registration. In this scenario, if the UATI color code of the source cell is different from the color code of the target cell, the UE may perform the UATI procedure. If not, the UE can maintain the current session. Additionally or alternatively, the UE may perform the UATI procedure based on the secondary color code. The UATI color code is typically assigned by the eAN via a UATI assignment message. In tunnel mode, the UATI color code is typically used by the UE to determine if the UE enters a new subnet. The UE typically compares the UATI color code with the pre-registration zone id (which should be the same color as the color code of the eAN) broadcast by the eAN, and if the UATI color code and the pre-registration zone id are different, It is determined that it has entered the subnet. In an aspect, even though the UATI color code of its own is different from the color code of the eAN, if the assigned UATI color code is listed in the secondary color code list, the UE can still be considered to have entered the same subnet The eAN may selectively advertise the secondary pre-registration zone id (which should be the same as the secondary color code of eAN).

Index 2 discusses a scenario when the UE moves from an LTE cell that does not support pre-registration to another LTE cell that supports pre-registration. In this scenario, the UE may attempt to restore the DO session, assuming an existing DO connection (e.g., the UE is moved from the LTE cell that allows pre-registration to the source cell). In an aspect, the source cell may also be an out of service cell.

Index 3 discusses scenarios when a UE transitions from a non-connected state to a connected state in the same LTE cell (e.g., when moving from a first portion of a cell to a second portion of a cell or when moving) do. In this scenario, the UE may retry to restore the DO session. For example, when the UE attempts to perform a data call and transitions to the RRC_CONNECTED state, the UE may receive data indicating that the LTE cell actually allows eHRPD pre-registration. As a result, the UE may attempt to restore the DO session.

Index 4 discusses the scenario when the UE moves from any cell to an LTE cell that does not allow pre-registration. In this scenario, the UE may do nothing.

6B illustrates a table 600B showing EVDO session processing when moving from eHRPD to pre-registration allowed LTE.

Index 1 discusses a scenario when a UE moves from an eHRPD cell to an LTE cell supporting pre-registration. In this scenario, if the protocol subtype of the active personality (e. G., Signaling adaptation protocol (SAP) subtype) is non-zero, the UE may recover the DO session. That is, if the UE has already negotiated parameters with the network containing the protocols, the UE may recover the data optimized (DO) session. Otherwise (if the subtype is zero), the UE may discard the current session, create a new session with IRAT (inter-RAT) protocol subtypes, and perform pre-registration. In an aspect, during an EV-DO session negotiation, the UE and the network need to negotiate subtypes and protocol types for each protocol. In order to operate at the S101 signaling interface, the appropriate subtypes of the individual protocols need to be negotiated. The IRAT protocol subtypes are the protocol subtypes necessary for S101 operation. For example, subtype 1 of the SAP protocol is one of the IRAT subtypes.

Index 2 discusses alternative UE behavior when moving from eHRPD to pre-registration allowed LTE. In an alternative aspect of Index 2, when the idle mobility scenario includes cell reselection and the UE successfully reselects the target LTE cell from the eHRPD, the SAP subtype in active personality is non- zero, the UE behavior may include performing a UATI procedure (instead of restoring the session as shown in index 1). Otherwise, the UE may discard the current session, create a new session with IRAT protocol subtypes, and perform pre-registration.

FIG. 7 illustrates a table 700 illustrating exemplary EVDO session processing during an E-UTRAN-eHRPD movement, in accordance with certain aspects of the present disclosure. In certain exemplary scenarios, the UE may have a DO session that has not timed out. Each index 702 represents a mobility scenario. Reference numeral 704 denotes a source RAT, for example, an LTE source cell (the UE moves from the source RAT) and indicates whether the source cell supports pre-registration or not. Reference numeral 706 denotes a target eHRPD cell, and the UE moves to the target eHRPD cell. Reference numeral 708 denotes an idle mobility scenario, and reference numeral 710 denotes a UE behavior based on a source cell 702, a target cell 706 and an idle mobility scenario 708.

Index 1 discusses a scenario when a UE moves from an LTE cell supporting pre-registration to an eHRPD cell. In this scenario, if a subnet change is detected (e.g., the source's subnet ID is different from the target's subnet ID) and the source's UATI color code is different from the target's secondary color code list (if available) Can perform UATI procedures. In this case, the UE has a source subnet ID, accesses the target to obtain the subnet ID of the target, and compares the subnet ID of the source with the subnet ID of the target to determine whether there is a subnet change.

For example, when the subnet ID = 123, the color code = blue, the subnet ID = 234 for the target cell, and the secondary color code list = {red, green} for the source cell, the UE sends the UATI procedure Can be determined to be performed.

In another example, when the subnet ID = 123, the color code = blue, the subnet ID = 123 for the target cell, and the secondary color code list = {red, green} for the source cell, .

As a further example, when the subnet ID = 123, the color code = red, the subnet ID = 234 for the target cell, and the secondary color code list = {red, green} for the source cell, .

In certain aspects, if the UE does not detect a subnet change, the UE can maintain the current session.

Index 2 discusses the scenario when the UE moves from an LTE cell that does not support pre-registration to an eHRPD cell. In this scenario, if a subnet change is detected, the UE may attempt to restore the DO session. In this case, since the UE has no way of knowing how far it has moved, and because the color codes are not as reliable as the subnet ids (because the color codes are re-used), the UE will not be able to perform UATI procedure and / ) It can be decided not to perform the venture. In certain aspects, if the UE does not detect a subnet change, the UE can maintain the current session.

Index 3 discusses the scenario when the UE moves from the non-eHRPD RAT (tunnel mode is not enabled) to the eHRPD cell. If, as in the previous case, a subnet change is detected, the UE may attempt to restore the DO session. If not, the UE can maintain the current session.

In certain aspects, the operations presented herein with respect to UE behavior for different mobility scenarios can derive various advantages. For example, operations help reduce the likelihood that a session is closed by the network, thus avoiding service interruption and data loss, preventing the network from retrieving the wrong session, and allowing the UE to pre- While in an allowed LTE cell, it is possible to prevent the tunnel mode from remaining inactive and to reduce unnecessary radio signaling to the EVDO session negotiation and / or UATI update procedure.

FIG. 8 illustrates exemplary operations 800 by a UE for performing session processing during UE movement (e.g., before an inter-cell UE), in accordance with certain aspects of the present disclosure. Operations 800 may begin at 802 by determining a mobility scenario for the transfer of the UE between the first cell and the second cell while the user equipment (UE) has an Evolution-Data Optimized (EVDO) . At 804, it is determined whether pre-registration of the UE EVDO session via the S101 interface is allowed. At 806, a procedure associated with the EVDO session is performed based on the mobility scenario.

The various operations of the above-described methods may be performed by any suitable means capable of performing the corresponding functions and configured to perform the corresponding functions. The means may include various hardware and / or software component (s) and / or module (s) including, but not limited to, circuitry, an application specific integrated circuit (ASIC) In general, when the operations illustrated in the Figures are provided, they may have corresponding counterpart means-plus-function components with similar numbering.

As used herein, the term "determining " includes a wide variety of operations. For example, "determining" includes computing, computing, processing, deriving, examining, looking up (e.g., looking up in a table, database or another data structure) You may. Also, "determining" may include receiving (e.g., receiving information), accessing (e.g., accessing data in memory), and the like. Also, "determining" may include resolving, selecting, selecting, setting, and the like.

As used herein, the phrase referring to "at least one of " items in a list refers to any combination of those items including single members. As an example, "at least one of a, b, or c" is intended to cover a, b, c, a-b, a-c, b-c, and a-b-c.

Those skilled in the art will understand that information and signals may be represented using any of a variety of different and different techniques and techniques. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be referenced throughout the above description may refer to voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, Optical fields or optical particles, or any combination thereof.

Those skilled in the art will further appreciate that the various illustrative logical blocks, modules, circuits, and algorithm steps described in connection with the disclosure herein may be implemented as electronic hardware, computer software, or combinations of both. To clearly illustrate this interchangeability of hardware and software, various illustrative components, blocks, modules, circuits, and steps have been described above generally in terms of their functionality. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the overall system. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present disclosure.

The various illustrative logical blocks, modules, and circuits described in connection with the disclosure herein may be implemented or performed with a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array Programmable logic devices, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general purpose processor may be a microprocessor, but, in the alternative, the processor may be any conventional processor, controller, microcontroller, or state machine. The processor may also be implemented as a combination of computing devices, e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration .

The steps of a method or algorithm described in connection with the disclosure herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. The software modules may reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor such that the processor can read information from, and write information to, the storage medium. Alternatively, the storage medium may be integral to the processor. The processor and the storage medium may reside in an ASIC. The ASIC may reside in a user terminal. Alternatively, the processor and the storage medium may reside as discrete components in a user terminal. In general, when the operations illustrated in the Figures are provided, they may have corresponding counterpart means-plus-function components with similar numbering.

In one or more exemplary designs, the functions described may be implemented in hardware, software, firmware, or any combination thereof. If implemented in software, these functions may be stored on or transmitted over as one or more instructions or code on a computer readable medium. Computer-readable media includes both communication media and computer storage media including any medium that facilitates transfer of a computer program from one place to another. The storage medium may be any available media accessible by a general purpose or special purpose computer. By way of example, and not limitation, such computer-readable media may comprise any form of computer-readable media, including but not limited to, RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, And may include general purpose or special purpose computers or any other medium that can be accessed by a general purpose or special purpose processor. Also, any connection is properly referred to as a computer-readable medium. For example, if the software is transmitted from a web site, server, or other remote source using wireless technologies such as coaxial cable, fiber optic cable, twisted pair cable, digital subscriber line (DSL), or infrared, radio and microwave , Coaxial cable, fiber optic cable, twisted pair cable, DSL, or wireless technologies such as infrared, radio and microwave are included in the definition of the medium. Disks and discs as used herein may be in the form of a compact disc (CD), a laser disc, an optical disc, a digital versatile disc (DVD), a floppy disc disk, and a blu-ray disc, and the disks usually reproduce the data magnetically, while the discs optically reproduce the data by the laser. Combinations of the above should also be included within the scope of computer readable media.

The previous description of the disclosure is provided to enable any person of ordinary skill in the art to make or use the disclosure. Various modifications to this disclosure will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other variations without departing from the scope or spirit of this disclosure. Accordingly, the disclosure is not intended to be limited to the examples and designs described herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (38)

CLAIMS 1. A method for wireless communication,
Determining a mobility scenario for a transfer of the UE between a first cell and a second cell while the user equipment (UE) has an Evolution-Data Optimized (EVDO) session;
Determining whether pre-registration of the UE EVDO session via the S101 signaling interface is allowed; And
Performing a procedure associated with the EVDO session based on the determined mobility scenario and whether the pre-registration is allowed
/ RTI >
Method for wireless communication. The method according to claim 1,
Wherein the first cell is associated with a first radio access technology (RAT), and the second cell is associated with a second RAT;
Method for wireless communication. 3. The method of claim 2,
Wherein determining the mobility scenario comprises determining that a transfer of the UE has occurred between the first RAT and the second RAT.
Method for wireless communication. The method of claim 3,
Wherein the first RAT comprises long term evolution (LTE) and the second RAT comprises evolved high rate packet data (eHRPD)
Method for wireless communication. 5. The method of claim 4,
Wherein the step of determining whether pre-registration of the UE EVDO session is allowed comprises determining that the first cell allows pre-registration of a UE EVDO session associated with the second RAT via the signaling interface doing,
Method for wireless communication. 6. The method of claim 5,
Wherein performing a procedure associated with the EVDO session when the UE moves from the first cell to the second cell comprises:
Wherein the unicast access terminal identifier (UATI) color code is different from all the color codes listed in the secondary color code list of the second cell when the secondary color code list of the second cell is available, If so, performing a UATI procedure; And
If the secondary color code list of the second cell is available if the UATI color code is the same as one color code listed in the secondary color code list of the second cell or if no subnet change is detected, Comprising: maintaining a session;
Method for wireless communication. 6. The method of claim 5,
Wherein performing the procedure associated with the EVDO session based on the mobility scenario comprises:
Restoring the EVDO session when the active personality's IRAT Signaling Adaptation Protocol (SAP) subtype is non-zero when the UE moves from the second cell to the first cell; And
If the IRAT signaling adaptation protocol (SAP) subtype of the active personality is zero when the UE moves from the second cell to the first cell,
Discarding the current session;
Creating a new session with inter radio access technology (IRAT) protocol subtypes; And
Performing pre-registration for the eHAPD session
/ RTI >
Method for wireless communication. 5. The method of claim 4,
Wherein the first cell does not allow pre-registration of a UE EVDO session associated with the second RAT over a signaling interface,
Method for wireless communication. 9. The method of claim 8,
Wherein performing the procedure associated with the EVDO session based on the mobility scenario comprises:
Restoring a data optimization (DO) session when a change in subnet is detected when the UE moves from the first cell to the second cell; And
Maintaining a current session when the subnet change is not detected when the UE moves from the first cell to the second cell.
Method for wireless communication. The method according to claim 1,
Wherein the first cell and the second cell are associated with the same radio access technology (RAT)
Method for wireless communication. 11. The method of claim 10,
The RAT includes a long term evolution (LTE)
Method for wireless communication. 11. The method of claim 10,
The step of determining the mobility scenario comprises:
Determining that a transfer of the UE has occurred between the first cell and the second cell.
Method for wireless communication. 13. The method of claim 12,
Wherein determining whether pre-registration of the UE EVDO session is allowed comprises:
Determining that the first cell does not allow pre-registration of a UE EVDO session associated with a second RAT over a signaling interface; And
And determining that the second cell allows pre-registration.
Method for wireless communication. 14. The method of claim 13,
Wherein performing the procedure associated with the EVDO session based on the mobility scenario comprises:
And restoring a data optimization (DO) session when the UE moves from the first cell to the second cell.
Method for wireless communication. 13. The method of claim 12,
Wherein determining whether pre-registration of the UE EVDO session is allowed comprises determining that both the first cell and the second cell allow pre-registration of a session associated with a second RAT over a signaling interface / RTI >
Method for wireless communication. 16. The method of claim 15,
Wherein performing the procedure associated with the EVDO session based on the mobility scenario comprises:
Wherein when the UE moves between the first cell and the second cell, a unicast access terminal identifier (UATI) color code is assigned to the second cell of the second cell when the secondary color code list of the second cell is available, Performing a UATI procedure when the UATI color code of the first cell is different from all of the color codes listed in the first color code list and the color code of the second cell is different from the color code of the second cell; And
When the UE is transitioning between the first cell and the second cell, if the secondary color code list of the second cell is available, the UATI color code is added to the secondary color code list of the second cell Maintaining the current session if the UATI color code of the first cell is the same as the one color code listed, or if the UATI color code of the first cell is the same as the UATI color code of the two cells.
Method for wireless communication. The method according to claim 1,
The step of determining the mobility scenario comprises:
Determining that a transfer of the UE has occurred between a first portion of the first cell and a second portion of the first cell.
Method for wireless communication. 18. The method of claim 17,
Wherein performing the procedure associated with the EVDO session based on the mobility scenario comprises:
When transitioning to the RRC_CONNECTED state, determining that pre-registration of the UE session is allowed; And
And restoring a data optimization (DO) session.
Method for wireless communication. An apparatus for wireless communication,
Means for determining a mobility scenario for the transfer of the UE between a first cell and a second cell while the user equipment (UE) has an Evolution-Data Optimized (EVDO) session;
Means for determining whether pre-registration of a UE EVDO session via the S101 signaling interface is allowed; And
And means for performing a procedure associated with the EVDO session based on the determined mobility scenario and whether the pre-registration is allowed.
Apparatus for wireless communication. 20. The method of claim 19,
Wherein the first cell is associated with a first radio access technology (RAT), and the second cell is associated with a second RAT;
Apparatus for wireless communication. 21. The method of claim 20,
Wherein the means for determining the mobility scenario comprises:
And to determine that a transfer of the UE has occurred between the first RAT and the second RAT.
Apparatus for wireless communication. 22. The method of claim 21,
Wherein the first RAT comprises long term evolution (LTE) and the second RAT comprises evolved high rate packet data (eHRPD)
Apparatus for wireless communication. 23. The method of claim 22,
Wherein the means for determining whether pre-registration of the UE EVDO session is allowed comprises:
Wherein the first cell is configured to determine, via the signaling interface, to allow pre-registration of a UE EVDO session associated with the second RAT,
Apparatus for wireless communication. 24. The method of claim 23,
Means for performing a procedure associated with the EVDO session when the UE moves from the first cell to the second cell,
Wherein the unicast access terminal identifier (UATI) color code is different from all the color codes listed in the secondary color code list of the second cell when the secondary color code list of the second cell is available, If detected, performs a UATI procedure; And
If the secondary color code list of the second cell is available if the UATI color code is the same as one color code listed in the secondary cell's secondary color code list or if no subnet change is detected, ≪ / RTI >
Apparatus for wireless communication. 24. The method of claim 23,
Wherein the means for performing a procedure associated with the EVDO session based on the mobility scenario comprises:
Recovering the EVDO session when the active personality's IRAT Signaling Adaptation Protocol (SAP) subtype is non-zero when the UE moves from the second cell to the first cell; And
If the IRAT signaling adaptation protocol (SAP) subtype of the active personality is zero when the UE moves from the second cell to the first cell,
Discard the current session;
Creating a new session with inter radio access technology (IRAT) protocol subtypes; And
To perform pre-registration for an eHAPD session
Configured,
Apparatus for wireless communication. 23. The method of claim 22,
Wherein the first cell does not allow pre-registration of a UE EVDO session associated with the second RAT over a signaling interface,
Apparatus for wireless communication. 27. The method of claim 26,
Wherein the means for performing a procedure associated with the EVDO session based on the mobility scenario comprises:
Recovering a data optimization (DO) session when a change in subnet is detected when the UE moves from the first cell to the second cell; And
And when the UE moves from the first cell to the second cell, if the subnet change is not detected,
Apparatus for wireless communication. 20. The method of claim 19,
Wherein the first cell and the second cell are associated with the same radio access technology (RAT)
Apparatus for wireless communication. 29. The method of claim 28,
The RAT includes a long term evolution (LTE)
Apparatus for wireless communication. 29. The method of claim 28,
Wherein the means for determining the mobility scenario comprises:
And to determine that a transfer of the UE has occurred between the first cell and the second cell.
Apparatus for wireless communication. 31. The method of claim 30,
Wherein the means for determining whether pre-registration of the UE EVDO session is allowed comprises:
Determine that the first cell does not allow pre-registration of a UE EVDO session associated with a second RAT over a signaling interface; And
Wherein the second cell is configured to determine that pre-
Apparatus for wireless communication. 32. The method of claim 31,
Wherein the means for performing a procedure associated with the EVDO session based on the mobility scenario comprises:
And to restore a data optimization (DO) session when the UE moves from the first cell to the second cell.
Apparatus for wireless communication. 31. The method of claim 30,
Wherein the means for determining whether pre-registration of the UE EVDO session is allowed comprises means for determining whether the first cell and the second cell both allow pre-registration of a session associated with a second RAT over a signaling interface Configured,
Apparatus for wireless communication. 34. The method of claim 33,
Wherein the means for performing a procedure associated with the EVDO session based on the mobility scenario comprises:
Wherein when the UE moves between the first cell and the second cell, a unicast access terminal identifier (UATI) color code is assigned to the second cell of the second cell when the secondary color code list of the second cell is available, Performing the UATI procedure when the UATI color code of the first cell is different from all of the color codes listed in the color code list and the color code of the second cell is different from the color code of the second cell; And
When the UE is transitioning between the first cell and the second cell, if the secondary color code list of the second cell is available, the UATI color code is added to the secondary color code list of the second cell And if the UATI color code of the first cell is the same as the one color code listed, or if the UATI color code of the first cell is the same as the UATI color code of the second cell,
Apparatus for wireless communication. 20. The method of claim 19,
Wherein the means for determining the mobility scenario comprises:
And to determine that a transfer of the UE has occurred between a first portion of the first cell and a second portion of the first cell.
Apparatus for wireless communication. 36. The method of claim 35,
Wherein the means for performing a procedure associated with the EVDO session based on the mobility scenario comprises:
When transitioning to the RRC_CONNECTED state, pre-registration of the UE session is allowed; And
Configured to restore a data optimization (DO) session,
Apparatus for wireless communication. An apparatus for wireless communication,
At least one processor; And
A memory coupled to the at least one processor,
Wherein the at least one processor comprises:
Determining a mobility scenario for the transfer of the UE between a first cell and a second cell while the user equipment (UE) has an Evolution-Data Optimized (EVDO) session,
Determine whether pre-registration of the UE EVDO session via the S101 signaling interface is allowed, and
And to perform a procedure associated with the EVDO session based on the determined mobility scenario and whether the pre-registration is allowed or not.
Apparatus for wireless communication. A computer readable medium for wireless communication,
The computer-
Determine a mobility scenario for the transfer of the UE between a first cell and a second cell while the user equipment (UE) has an Evolution-Data Optimized (EVDO) session;
Determining whether pre-registration of the UE EVDO session via the S101 signaling interface is allowed; And
To perform a procedure associated with the EVDO session based on the determined mobility scenario and whether the pre-registration is allowed,
A computer readable medium having code executable by a computer.

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