Patent Application
20180302891
Aspects of the disclosure relate to enabling carrier aggregation receiver chains of a user equipment.
Wireless communication systems have developed through various generations, including a first-generation analog wireless phone service (1G), a second-generation (2G) digital wireless phone service (including interim 2.5G and 2.75G networks) and third-generation (3G) and fourth-generation (4G) high speed data/Internet-capable wireless services. There are presently many different types of wireless communication systems in use, including Cellular and Personal Communications Service (PCS) systems. Examples of known cellular systems include the cellular Analog Advanced Mobile Phone System (AMPS), and digital cellular systems based on Code Division Multiple Access (CDMA), Frequency Division Multiple Access (FDMA), Time Division Multiple Access (TDMA), the Global System for Mobile Communications (GSM) variation of TDMA, and newer hybrid digital communication systems using both TDMA and CDMA technologies.
More recently, Long Term Evolution (LTE) has been developed as a wireless communications protocol for wireless communication of high-speed data for mobile phones and other data terminals. LTE is based on GSM, and includes contributions from various GSM-related protocols such as Enhanced Data rates for GSM Evolution (EDGE), and Universal Mobile Telecommunications System (UMTS) protocols such as High-Speed Packet Access (HSPA).
In wireless communication systems, wireless terminals, referred to as User Equipments (UEs) in LTE, communicate wirelessly with base stations of the wireless communication system. In the downlink, from the base station to the UE, the UE may receive signals in a single frequency band associated with a single radio-frequency (RF) carrier. In order to improve capacity (e.g., in terms of downlink bitrate), the concept of carrier aggregation (CA) has been introduced in 3rd Generation Partnership Program (3GPP) standards. Using CA, the UE may simultaneously receive a plurality of RF carriers. These RF carriers are normally referred to as component carriers (CCs). On each CC, there is a modulated information signal, e.g., an Orthogonal Frequency Division Multiple Access (OFDMA) signal or a CDMA signal, carrying payload data and/or control information. The CCs may be located within the same operating frequency band, in which case the CA is referred to as intra-band CA. Alternatively, the CCs may be located within different operating frequency bands, in which case the CA is referred to as inter-frequency CA.
For intra-frequency CA, the plurality of CCs may be located contiguously (in frequency), in which case the CA is referred to as contiguous CA, or may be non-contiguously located (in frequency) with frequency gaps in between, in which case the CA is referred to as non-contiguous CA. In an intra-frequency system, all the CCs belong to the same radio access technology (RAT), wherein in an inter-frequency system, the CCs may belong to different RATs. For example, in such systems, one CC may belong to LTE frequency division duplex (FDD) and another one to LTE time division duplex (TDD). As another example, the CCs may belong to Universal Terrestrial Radio Access Network (UTRAN) FDD and evolved UTRAN (E-UTRAN) FDD.
In one scenario, the UE may be allocated a primary CC (PCC) associated with a primary cell (PCell) of the cellular communications network. When an increase in downlink capacity is desired, for whatever reason, the UE may additionally be allocated one or more secondary CCs (SCCs) associated with respective secondary cells (SCells).
The following presents a simplified summary relating to one or more aspects disclosed herein. As such, the following summary should not be considered an extensive overview relating to all contemplated aspects, nor should the following summary be regarded to identify key or critical elements relating to all contemplated aspects or to delineate the scope associated with any particular aspect. Accordingly, the following summary has the sole purpose to present certain concepts relating to one or more aspects relating to the mechanisms disclosed herein in a simplified form to precede the detailed description presented below.
In an aspect, a method for enabling carrier aggregation receivers of a user equipment includes receiving, at the user equipment, positioning assistance data from a location server, the positioning assistance data including information to assist the user equipment to perform a plurality of inter-frequency positioning measurements corresponding to a plurality of inter-frequency base stations, determining, by the user equipment, a carrier aggregation receiver chain configuration supported by the user equipment, the carrier aggregation receiver chain configuration having a number of carrier aggregation receiver chains corresponding to the plurality of inter-frequency base stations; and enabling, by the user equipment, the number of carrier aggregation receiver chains to perform the plurality of inter-frequency positioning measurements.
In an aspect, an apparatus for enabling carrier aggregation receivers of a user equipment includes a transceiver configured to receive positioning assistance data from a location server, the positioning assistance data including information to assist the user equipment to perform a plurality of inter-frequency positioning measurements corresponding to a plurality of inter-frequency base stations, and at least one processor configured to: determine a carrier aggregation receiver chain configuration supported by the user equipment, the carrier aggregation receiver chain configuration having a number of carrier aggregation receiver chains corresponding to the plurality of inter-frequency base stations, and enable the number of carrier aggregation receiver chains to perform the plurality of inter-frequency positioning measurements.
In an aspect, a non-transitory computer-readable medium storing computer-executable instructions for enabling carrier aggregation receivers of a user equipment includes computer-executable instructions including at least one instruction instructing a user equipment to receive positioning assistance data from a location server, the positioning assistance data including information to assist the user equipment to perform a plurality of inter-frequency positioning measurements corresponding to a plurality of inter-frequency base stations, at least one instruction instructing the user equipment to determine a carrier aggregation receiver chain configuration supported by the user equipment, the carrier aggregation receiver chain configuration having a number of carrier aggregation receiver chains corresponding to the plurality of inter-frequency base stations, and at least one instruction instructing the user equipment to enable the number of carrier aggregation receiver chains to perform the plurality of inter-frequency positioning measurements.
In an aspect, an apparatus for enabling carrier aggregation receivers of a user equipment includes means for receiving positioning assistance data from a location server, the positioning assistance data including information to assist the user equipment to perform a plurality of inter-frequency positioning measurements corresponding to a plurality of inter-frequency base stations, means for determining a carrier aggregation receiver chain configuration supported by the user equipment, the carrier aggregation receiver chain configuration having a number of carrier aggregation receiver chains corresponding to the plurality of inter-frequency base stations, and means for enabling the number of carrier aggregation receiver chains to perform the plurality of inter-frequency positioning measurements.
Other objects and advantages associated with the aspects disclosed herein will be apparent to those skilled in the art based on the accompanying drawings and detailed description.
A more complete appreciation of aspects of the disclosure and many of the attendant advantages thereof will be readily obtained as the same becomes better understood by reference to the following detailed description when considered in connection with the accompanying drawings which are presented solely for illustration and not limitation of the disclosure, and in which:
Disclosed are techniques for enabling carrier aggregation receivers of a user equipment. In an aspect, the user equipment receives positioning assistance data from a location server, the positioning assistance data including information to assist the user equipment to perform a plurality of inter-frequency positioning measurements corresponding to a plurality of inter-frequency base stations, determines a carrier aggregation receiver chain configuration supported by the user equipment, the carrier aggregation receiver chain configuration having a number of carrier aggregation receiver chains corresponding to the plurality of inter-frequency base stations, and enables the number of carrier aggregation receiver chains to perform the plurality of inter-frequency positioning measurements.
These and other aspects of the disclosure are described in the following description and related drawings directed to specific aspects of the disclosure. Alternate aspects may be devised without departing from the scope of the disclosure. Additionally, well-known elements of the disclosure will not be described in detail or will be omitted so as not to obscure the relevant details of the disclosure.
The words “exemplary” and/or “example” are used herein to mean “serving as an example, instance, or illustration.” Any aspect described herein as “exemplary” and/or “example” is not necessarily to be construed as preferred or advantageous over other aspects. Likewise, the term “aspects of the disclosure” does not require that all aspects of the disclosure include the discussed feature, advantage or mode of operation.
Further, many aspects are described in terms of sequences of actions to be performed by, for example, elements of a computing device. It will be recognized that various actions described herein can be performed by specific circuits (e.g., application specific integrated circuits (ASICs)), by program instructions being executed by one or more processors, or by a combination of both. Additionally, these sequence of actions described herein can, in some implementations, be embodied entirely within any form of computer readable storage medium having stored therein a corresponding set of computer instructions that upon execution would cause an associated processor to perform the functionality described herein. Thus, the various aspects of the disclosure may be embodied in a number of different forms, all of which have been contemplated to be within the scope of the claimed subject matter. In addition, for each of the aspects described herein, the corresponding form of any such aspects may be described herein as, for example, “logic configured to” perform the described action.
A client device, referred to herein as a user equipment (UE), may be mobile or stationary, and may communicate with a radio access network (RAN). As used herein, the term “UE” may be referred to interchangeably as an “access terminal” or “AT,” a “wireless device,” a “subscriber device,” a “subscriber terminal,” a “subscriber station,” a “user terminal” or UT, a “mobile terminal,” a “mobile station” and variations thereof. Generally, UEs can communicate with a core network via the RAN, and through the core network the UEs can be connected with external networks such as the Internet. Of course, other mechanisms of connecting to the core network and/or the Internet are also possible for the UEs, such as over wired access networks, WiFi networks (e.g., based on the Institute of Electrical and Electronics Engineers (IEEE) 802.11 standard, etc.) and so on. UEs can be embodied by any of a number of types of devices including but not limited to personal computer (PC) cards, compact flash devices, external or internal modems, wireless or wireline phones, and so on. A communication link through which UEs can send signals to the RAN is called an uplink channel (e.g., a reverse traffic channel, a reverse control channel, an access channel, etc.). A communication link through which the RAN can send signals to UEs is called a downlink or forward link channel (e.g., a paging channel, a control channel, a broadcast channel, a forward traffic channel, etc.). As used herein the term traffic channel (TCH) can refer to either an uplink/reverse or downlink/forward traffic channel.
Referring to
Referring to
In carrier aggregation (CA) mode, a radio-receiver circuit (described further below) of the UE 202 is arranged to receive a plurality of (downlink) component carriers (CCs), which may be contiguous or non-contiguous. Normally, one of the CCs is a primary CC (PCC) of a primary cell (PCell), and any other CCs are secondary CCs (SCCs) of secondary cells (SCells). In
In
The processor 306 and memory 314 may each be coupled to at least one baseband modem processor, such as baseband modem processor 316. A baseband-RF resource chain may include baseband modem processor 316, which may perform baseband/modem functions for communications on at least one CC (e.g., first CC 210 or second CC 212), and may further include one or more amplifiers and radios, referred to generally herein as RF resource 318. RF resource 318 may perform transmit/receive functions for at least one CC. In an aspect, RF resource 318 may include separate transmit and receive circuitry, or may include a transceiver that combines transmitter and receiver functions. The RF resource 318 may be coupled to a wireless antenna 320. The baseband modem processor 316 may further include a CA enablement module 334 configured to perform the CA enablement functionality described herein.
In one aspect, the UE 202 may have a common baseband-RF resource chain (i.e., a single baseband modem processor, such as baseband modem processor 316 and a single RF resource, such as RF resource 318). In another aspect, the UE 202 may have separate baseband-RF resource chains that include physically or logically separate RF resources (illustrated as RF1 and RF2), each of which may be coupled to a common baseband modem processor, such as baseband modem processor 316 (i.e., a single device that performs baseband/modem functions for the UE 202). Alternatively, the UE 202 may have separate baseband-RF resource chains that also include physically or logically separate baseband modem processors (illustrated as BB1 and BB2). In an aspect, each separate baseband-RF resource chain, i.e., a separate RF resource linked to a separate baseband modem processor, may be configured to communicate on a separate CC.
The memory 314 of the UE 202 may further store an operating system (OS) and user application software. In a particular aspect, the processor 306, memory 314, baseband modem processor 316 (including, in some aspects, BB1 and BB2), and RF resource 318 (including, in some aspects, RF1 and RF2) may be included in a system-on-chip (SoC) device 322. Further, various input and output devices may be coupled to components of the SoC device 322, such as interfaces or controllers. Example user input components suitable for use in the UE 202 may include, but are not limited to, a keypad 324 and a touchscreen display 326.
In a CA system, i.e., a multi-carrier system, the UE 202 may simultaneously receive and/or transmit data over more than one CC (e.g., first CC 210 and/or second CC 212). The multi-carrier concept is used in both HSPA and LTE. In CA mode, the primary CC carries all common and UE-specific control channels, while the secondary CC may contain only signaling information and signals. Signaling information or signals that are UE-specific may not be present in the secondary CC, since both primary uplink and downlink CCs are typically UE-specific. This means that different UEs in a cell may have different primary downlink CCs.
The simultaneous transmission and/or reception over the CCs enables the UE 202 to increase its data transmission and reception rates. For instance, an aggregation of two 20 MHz carriers in an LTE multi-carrier system would theoretically lead to a doubled data rate compared to that attained by a single 20 MHz carrier.
The UE 202 may be able to perform measurements on a secondary CC, and likewise on other frequency carriers, without utilizing measurement gaps or compressed mode, where the UE 202 comprises more than one transceiver (e.g., RF resources RF1 and RF2). Compressed mode can be used to make measurements on another frequency (inter-frequency) or on a different radio access technology. Using compressed mode, the UE 202 ceases transmission and reception for a short time and performs measurements on the other frequency or RAT in that time. Measurement gaps define time periods when no uplink or downlink transmissions will be scheduled. In LTE, for example, using measurement gaps, the UE 202 will experience a 6 ms blackout every 40 ms for the duration of the inter-frequency measurements. This is a 15% short-term drop in throughput. Measurement gaps are overhead for the network, and therefore, network carriers prefer the UE 202 to utilize Inter-Frequency Observed Time Difference of Arrival (IF-OTDOA) using CA instead of measurement gaps.
However, the capability to perform measurements on a secondary CC, and likewise on other frequency carriers, without utilizing measurement gaps can either be optional or mandatory in the UE 202. In addition, this capability may be mandatory for a certain number of secondary CCs and optional beyond that number. For example, if the UE 202 were configured to support up to four CCs in total, it may be mandatory for the UE 202 to measure on one secondary CC (i.e., on the second carrier) without measurement gaps but optional to measure on the remaining secondary CCs (i.e., on the third and fourth carriers). This means that where the UE 202 is configured to support up to two CCs in total, the measurements on the secondary CC, which is the only secondary carrier, may be mandatory. As this measurement capability is optional, the UE 202 may separately signal this capability to the network in addition to its carrier aggregation capability signaling.
U.S. cellular carriers have mandated IF-OTDOA for emergency calls (e.g., e911 calls) to cover locations where they may have isolated eNode Bs on one frequency, but may have more eNode Bs on one or more other frequencies. In present implementations, the UE (e.g., UE 202) cannot make use of its CA receiver chains for IF-OTDOA measurements, even though it has the capability, unless it is on a CA call. If the UE 202 is not in CA mode, inter-frequency measurements utilize measurement gaps for the current serving cell. As noted above, measurement gaps define time periods when no uplink or downlink transmissions will be scheduled. For example, in LTE, using measurement gaps, the UE 202 will experience a 6 ms blackout every 40 ms for the duration of the inter-frequency measurements. As noted above, measurement gaps are overhead for the network, and therefore, network carriers prefer the UE 202 to utilize IF-OTDOA using CA instead of measurement gaps.
Presently, the network controls the CA enablement or disablement for a UE (e.g., UE 202) depending on the download/upload speed requirements of the UE 202. The network enables CA for the UE 202 based on the number of CCs the UE 202 is capable of receiving and the UE 202's throughput requirements. Currently, the network does not consider OTDOA session activity by the UE 202 to enable CA mode at the UE 202 during, for example, e911 calls, resulting in no usage of CA receivers for OTDOA measurements for such calls. This can adversely affect the OTDOA performance and result in less efficient usage of the UE 202's CA capabilities.
The present disclosure provides a mechanism to enable CA receivers for OTDOA measurements, particularly during an e911 call. Two solutions are presented, one where CA receiver enablement is network-initiated, and a second where the CA receiver enablement is performed by the UE 202. Referring to the first solution, a mechanism of the present disclosure augments the LPP procedure illustrated in
Specifically, as shown in
The “CA Rx Enablement for OTDOA” information element (IE) can convey the following information to the UE 202: (1) enablement or disablement of CA receivers, (2) which CA mode to use, e.g., two-receiver downlink carrier aggregation (2DLCA), three-receiver downlink carrier aggregation (3DLCA), etc. (which may be based on the assistance data from the location server 170), and (3) whether the CA command from the location server 170 should override the network CA disablement/enablement during e911 calls. Note that in 2DLCA, two receivers, i.e., the primary receiver and a secondary CA receiver, will be used. In 3DLCA, three receivers, i.e., the primary receiver and two secondary CA receivers, will be used.
Upon receiving the above-described CA enablement command, the UE 202, at 514, can enable the appropriate CA receivers and perform the RSTD/OTDOA measurements. At 516, the UE 202 can report the measurements to the location server 170. Although not illustrated in
In another aspect of the network-initiated solution proposed herein, the location server 170 may involve the serving base station, for example, first base station 220 of
Referring to
At 608, the location server 170 sends the assistance data to the UE 202. Simultaneously, at 610, the location server 170 can send a message to the serving base station (for example, first base station 220 of
Upon receiving the above-described CA enablement command, the UE 202, at 614, can enable the appropriate CA receivers and perform the RSTD/OTDOA measurements, as at 514 of
In the UE-initiated solution described herein, the location server 170 can send multi-frequency assistance data to the UE 202. In an aspect, the location server 170 may send multi-frequency assistance data to the UE 202 depending on whether or not the UE 202 would benefit from utilizing CA receiver chains for inter-frequency neighbor search based on the base station (e.g., eNode B) deployment at the location of the UE 202 and the assistance data to be sent, similar to the decision at 508 of
The flow 700 begins at 702. At 704, the UE 202 initializes an OTDOA session with the location server 170. The OTDOA session may be initiated based on the UE 202 initiating an emergency call (e.g., an e911 call) and in response, receiving a location request from the location server 170, for example an NILR, or receiving an LPP Request Capabilities message from the location server 170, as at 502 of
At 706, the UE 202 responds with an LPP Provide Capabilities message, as at 504 of
At 708, the UE 202 receives assistance data from the location server 170 in the form of an LPP Provide Assistance Data message, as at 512 of
At 710, the UE 202 determines whether or not it supports a CA mode (as opposed to an MG mode) and whether or not CA would be beneficial for IF-OTDOA measurements (e.g., whether are not there are enough base stations near the UE 202 on the same frequency to perform enough positioning measurements to accurately locate the UE 202). If the UE 202 does not support a CA mode, then at 712, the UE 202 utilizes measurement gaps to perform the IF-OTDOA measurements. However, although not illustrated in
Note that it is possible that, for a given inter-frequency positioning measurement, there may not be a CA receiver chain configuration supported by the UE 202. For example, this can occur when the received assistance data includes information for a greater number of inert-frequency bands than there are UE-supported CA receiver chain configurations (e.g., if the UE 202 has only two carrier aggregation receiver chains, but the received assistance data includes information for seven inter-frequency bands). As another example, this can also occur when the received assistance data includes inter-frequency bands that are not supported by the UE's 202 CA receiver chains. As yet another example, this can also occur when the UE 202 is already in CA mode for data activity and the received assistance data includes non-overlapped inter-frequency bands. When the UE 202 does not have a CA receiver chain configuration for one or more of the received inter-frequency bands for the reasons above, it can use MG mode to perform inter-frequency measurements in those bands on the primary receiver chain or one or more supported available carrier aggregation receiver chains. When the UE 202 does not have a CA receiver chain configuration for any of the received inter-frequency bands, it can use MG mode for all inter-frequency positioning measurements. As such, it is understood that the UE 202 may also determine, after 710 but before 714, whether or not it supports a CA receiver chain configuration for the given inter-frequency positioning measurement. As such, even if a CA mode is supported, UE 202 moves to 712 instead of 714, and the UE 202 utilizes measurement gaps to perform the IF-OTDOA measurements.
Referring back to 710, if the UE 202 supports a CA mode and CA would benefit from IF-OTDOA measurements, then at 714, the UE 202 determines whether or not CA is already being used for a data session (e.g., a high-speed data download). If it is, then at 716, the UE 202 determines whether or not additional CA receivers would be beneficial to perform the IF-OTDOA measurements on the number of frequency bands indicated in the assistance data received from the location server 170 at 708. If additional CA receivers would be beneficial, or CA is not already being used for a data session, then at 718, the UE 202 enables the number of CA receivers that would be beneficial to perform the IF-OTDOA measurements. Note that if the number of CA receivers available on the UE 202 (e.g., 2DLCA) is less than the number of frequency bands (e.g., four) in the received assistance data to be searched/measured, then the UE 202 utilizes measurement gaps to measure the remaining (e.g., two) frequency bands. In such cases, if the UE 202 is already performing a CA-based download (e.g., a high-speed data download), or multiple CA-based downloads, the UE 202 can select the receiver chain(s) that is/are handling the lowest data rate download(s) to perform IF-OTDOA measurements. The UE 202 may preferentially avoid using the primary receiver chain for performing IF-OTDOA measurements so that it can continue receiving the CA-based download(s).
More specifically, the primary receiver chain may be configured to perform inter-frequency measurements on other frequencies using measurement gaps. For example, if the UE 202 determines to use only the measurement gap method to perform inter-frequency measurements, then the UE 202 will send a request for measurement gaps to the serving cell and will tune the primary receiver chain to one inter-frequency and perform PRS/RSTD measurements on that frequency. Similarly, for the second inter-frequency band, the UE 202 will again request new measurement gaps and perform RSTD measurements. In this manner, the UE 202 can perform inter-frequency measurements for all the inter-frequency bands without using CA-receivers.
To perform measurements on any additional frequencies, the UE 202 would need to employ additional (secondary) receiver chains, one receiver chain per frequency, as only the primary receiver chain may be able to use measurement gaps (although the secondary receiver chains of certain UE's may also be able utilize measurement gaps). Alternatively, the UE 202 may utilize the primary receiver chain to measure one frequency and one or more secondary receiver chains to measure additional frequencies. Thus, for example, if the assistance data included information about base stations on four different frequencies but only the primary receiver chain is currently enabled, the UE 202 will need to enable two or three additional receiver chains, if available, to measure the remaining two or three frequencies (depending on whether the primary receiver chain uses measurement gaps).
More generally, the UE 202 can determine whether or not a carrier aggregation receiver chain can support at least one of the plurality of inter-frequency positioning measurements indicated in the positioning assistance data. Based on the carrier aggregation receiver chain being able to support at least one of the plurality of inter-frequency positioning measurements, the UE 202 can determine whether or not the carrier aggregation receiver chain is currently being used for a data session. Based on the carrier aggregation receiver chain being currently used for the data session, the UE 202 can determine whether or not to enable at least one additional carrier aggregation receiver chain for the plurality of inter-frequency positioning measurements. Alternatively, based on the carrier aggregation receiver chain not being currently used for the data session or the at least one additional carrier aggregation receiver chain not being enabled for the plurality of inter-frequency positioning measurements, the UE 202 can enable the at least one additional carrier aggregation receiver.
As a specific example, if the UE 202 has three CA receiver chains (e.g., 3DLCA) and is currently engaged in a data session utilizing two receiver chains (e.g., 2DLCA) and the assistance data includes only one inter frequency band, then the UE 202 can enable (i.e., turn on) the unused CA receiver chain to perform the IF-OTDOA measurements. Because the UE 202 uses a receiver chain that is not being utilized for the data session to perform the IF-OTDOA measurements, the data throughput of the data session will not be impacted.
As another specific example, if the UE 202 has three CA receiver chains (e.g., 3DLCA) and is currently engaged in a data session utilizing all three receiver chains and the assistance data includes four IF-OTDOA bands, then the UE 202 can assign one frequency band to each CA receiver chain. The CA receiver chain with the lowest data rate of the data session can then utilize measurement gaps to measure the fourth frequency band, rather than require the primary receiver chain to use measurement gaps. This minimizes the impact on the throughput of the data session to the UE 202.
As yet another specific example, if the UE 202 has three CA receiver chains (e.g., 3DLCA) and is currently engaged in a data session utilizing two receiver chains (e.g., 2DLCA) and the assistance data includes five IF-OTDOA bands, then the UE 202 can check whether the CA receivers are already engaged in the same frequency bands as the IF-OTDOA bands. If they are, then the UE 202 can use the already engaged CA receiver chains for positioning measurements on those frequency bands. If the frequency bands are not overlapping, then unused CA receiver chains can be used to measure all frequency bands.
Thus, as illustrated in the foregoing examples, the carrier aggregation receiver chain configuration maximizes the number of the plurality of inter-frequency positioning measurements indicated in the positioning assistance data that can be performed by one or more carrier aggregation receiver chains of the UE 202.
At 720, whether the UE 202 performed legacy OTDOA using measurement gaps (712), determined that no additional CA receiver chains are to be enabled (716), or enabled the additional CA receiver chains (718), the UE 202 reports the measured OTDOAs/RSTDs to the location server 170. In particular, if the UE 202 performed inter-frequency positioning measurements, the UE 202 sends the plurality of inter-frequency positioning measurements to the location server 170. At 722, the flow 700 ends. Alternatively or additionally, it is understood that the UE 202 may use the plurality of inter-frequency positioning measurements to compute its own position with or without reporting to the location server 170.
The functionality of the modules of
In addition, the components and functions represented by
Those of skill in the art will appreciate that information and signals may be represented using any of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be referenced throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.
Further, those of skill in the art will appreciate that the various illustrative logical blocks, modules, circuits, and algorithm steps described in connection with the aspects disclosed 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 aspects disclosed 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 (FPGA) or other programmable logic device, 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. A 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 methods, sequences and/or algorithms described in connection with the aspects disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module may reside in random access memory (RAM), flash memory, read-only memory (ROM), erasable programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) memory, registers, 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. In the alternative, 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 (e.g., UE). In the alternative, the processor and the storage medium may reside as discrete components in a user terminal.
In one or more exemplary aspects, the functions described may be implemented in hardware, software, firmware, or any combination thereof. If implemented in software, the 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 non-transitory computer-readable storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a computer. By way of example, and not limitation, such computer-readable media can comprise RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. Also, any connection is properly termed a computer-readable medium. For example, if the software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwave, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of medium. Disk and disc, as used herein, includes compact disc (CD), laser disc, optical disc, digital versatile disc (DVD), floppy disk and Blu-ray disc where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above should also be included within the scope of computer-readable media.
For example, in an aspect, a computer-readable medium may store computer-executable instructions for enabling carrier aggregation receivers of a UE, such as UE 202. The computer-executable instructions may include instructions instructing the UE (or one or more processors or one or more devices within the UE) to perform the method illustrated in
While the foregoing disclosure shows illustrative aspects of the disclosure, it should be noted that various changes and modifications could be made herein without departing from the scope of the disclosure as defined by the appended claims. The functions, steps and/or actions of the method claims in accordance with the aspects of the disclosure described herein need not be performed in any particular order. Furthermore, although elements of the disclosure may be described or claimed in the singular, the plural is contemplated unless limitation to the singular is explicitly stated.
