TWI444051B - Dynamic power amplifier backoff using headroom information - Google Patents

Description

Dynamic power amplifier back shifting using header space information

The following description relates generally to wireless communications and, more particularly, to subband scheduling and power amplifier post shifting.

Wireless network connectivity systems have become a common means of communication for the majority of people in the world. Wireless communication devices have become smaller and more powerful to meet consumer needs and to improve portability and convenience. Consumers have become dependent on wireless communication devices such as cellular phones, personal digital assistants (PDAs), requiring reliable service, expanded coverage, and increased functionality.

In general, a wireless multiple access communication system can simultaneously support communication for multiple wireless terminals or user devices. Each terminal communicates with one or more access points via transmissions on the forward and reverse links. The forward link (or downlink) refers to the communication link from the access point to the terminal, and the reverse link (or uplink) refers to the communication link from the terminal to the access point.

A wireless system may be a multiple access system capable of supporting communication with multiple users by sharing available system resources (eg, bandwidth and transmission power). Examples of such multiple access systems include a code division multiple access (CDMA) system, a time division multiple access (TDMA) system, a frequency division multiple access (FDMA) system, and an orthogonal frequency division multiple access (OFDMA) system. .

Typically, each access point supports a terminal located within a particular coverage area known as a sector. A sector that supports a particular terminal is called a serving sector. Other sectors that do not support this particular terminal are referred to as non-serving sectors. Specific resources can be configured to terminals in a sector to allow simultaneous support of multiple terminals. However, transmissions by terminals in adjacent sectors are not coordinated. Therefore, transmissions by terminals at the edge of the sector can cause interference and degradation of terminal performance within the sector.

A simplified summary of one or more embodiments is provided below to provide a basic understanding of the embodiments. This Summary is not an extensive overview of all contemplated embodiments, and is not intended to identify key or critical elements of the embodiments, and is not intended to limit the scope of any or all embodiments. The sole purpose of the present invention is to be a

According to one aspect, a method of mitigating nonlinear distortion in the spectral mask margin is described herein. The method can include scheduling the first set on an internal sub-band of the configured spectrum based on power amplifier header spatial information from the first set of at least one mobile device. The method can also include, after scheduling the internal sub-band, scheduling subsequent groups on the remaining portion of the configured spectrum based on power amplifier header spatial information from subsequent sets of at least one mobile device.

Another aspect relates to a wireless communication device. The wireless communications apparatus can include at least one processor configured to schedule at least one mobile device having a power limit to be scheduled on an internal sub-band of a spectrum and to have no power limiting On the remainder of the spectrum, the power constraints are related to the power amplifier header space information. The wireless communication device can also include a memory coupled to the at least one processor.

Yet another aspect relates to a wireless communication device that implements dynamic power amplifier back-shifting. The wireless communications apparatus can include means for scheduling the first set on an internal sub-band of the configured spectrum based at least in part on power amplifier header spatial information from the first set of at least one mobile device. The wireless communications apparatus can additionally include means for scheduling the subsequent set of the remaining portion of the configured spectrum based at least in part on power amplifier header spatial information from a subsequent set of at least one mobile device, and A component of the sub-band is selected based at least in part on the power amplifier header spatial information.

A further aspect relates to a computer program product having a computer readable medium, the computer readable medium comprising at least one computer for scheduling at least one mobile device having a power limitation within a spectrum The code on the subband. The code may also cause at least one computer to schedule at least one mobile device with no power limitation on the remainder of the spectrum, the power limit being related to the power amplifier header space information.

According to another aspect, a device in a wireless communication system can include a processor configured to at least partially based on power amplifier header space information from a first group of at least one mobile device A set is scheduled on the internal subband of the configured spectrum. The processor can also be configured to schedule the subsequent group on a remaining portion of the configured spectrum based at least in part on power amplifier header spatial information from a subsequent group of at least one mobile device. Moreover, the processor can be configured to select the sub-band based at least in part on the power amplifier header spatial information. Furthermore, the device can include a memory coupled to the processor.

According to another aspect, a method of facilitating dynamic adjustment of the power amplifier back shift is described herein. The method can include transmitting a periodic power header spatial measurement corresponding to a maximum achievable transmission power. The method can also include notifying a static difference power header space corresponding to one or more points of interest and receiving a subband assignment.

Another aspect relates to a wireless communication device. The wireless communication device can include at least one processor configured to transmit a periodic power header spatial measurement corresponding to a maximum achievable transmission power and to notify a static corresponding to one or more points of interest Difference power header space. The wireless communication device can also include a memory coupled to the at least one processor.

Yet another aspect relates to a wireless communication device that mitigates nonlinear distortion in the spectral mask margin. The wireless communication device can include means for transmitting a periodic power header spatial measurement corresponding to a maximum achievable transmission power for a wide frequency assignment. Moreover, the wireless communication device can include means for notifying a static difference power header space corresponding to one or more points of interest.

Another aspect relates to a computer program product having a computer readable medium, the computer readable medium including a periodic power header for causing at least one computer to transmit a maximum achievable transmission power The code of the space measurement result. The code may also cause at least one computer to notify the static difference power header space corresponding to one or more points of interest and receive a subband assignment.

According to another aspect, a device can be provided in a wireless communication system, the device including a processor configured to transmit a periodic power indicator corresponding to a maximum achievable transmission power with respect to a broadband assignment Head space measurement results. Additionally, the processor can be configured to notify a static difference power header space corresponding to one or more points of interest. Additionally, the apparatus can include a memory coupled to the processor.

For the purpose of the foregoing and related ends, the or such embodiments include the features which are fully described hereinafter and are particularly pointed out in the scope of the claims. The following description and the annexed drawings are set forth in the claims These aspects are indicative, however, of but a few of the various embodiments of the various embodiments of the various embodiments, and the described embodiments are intended to include all such aspects and their equivalents.

Various embodiments are described with reference to the drawings, in which like reference numerals are used to refer to the like. In the following description, numerous specific details are set forth However, it will be apparent that the embodiment can be practiced without such specific details. In other instances, well-known structures and devices are shown in the form of a block diagram to facilitate describing one or more embodiments.

As used in this application, the terms "component", "module", "system" and the like are intended to mean a computer-related entity, which is a hardware, a firmware, a combination of hardware and software, a software or an execution software. For example, a component can be, but is not limited to being, a process executed on a processor, a processor, an object, an executable, a thread, a program, and/or a computer. By way of illustration, both an application and a computing device executing on a computing device can be a component. One or more components may reside in a process and/or execution thread, and a component may be located on a computer and/or distributed between two or more computers. In addition, such components can be executed from a variety of computer readable media having various data structures stored thereon. The component can communicate, for example, via local and/or remote processing based on a signal having one or more data packets (eg, from a signal interacting with the regional system, another component of the distributed system, and / or data across components such as the Internet that interact with other systems).

Moreover, various embodiments are described herein in connection with a mobile device. Mobile devices may also be referred to as systems, subscriber units, subscriber stations, mobile stations, mobile devices, remote stations, remote terminals, access terminals, user terminals, terminals, wireless communication devices, user agents, User equipment or user equipment (UE). Mobile devices can be cellular phones, cordless phones, Session Initiation Protocol (SIP) phones, wireless area loop (WLL) stations, personal digital assistants (PDAs), wireless devices with handheld capabilities, computing devices, or wireless connectivity Other processing equipment for the data machine. Moreover, various embodiments are described herein in connection with a base station. The base station can be utilized for communicating with mobile devices and can also be referred to as an access point, Node B, or some other terminology.

In addition, the various aspects and features described herein can be implemented as a method, apparatus, or article of manufacture using standard stylized and/or engineering techniques. The term "article of manufacture" as used herein is intended to encompass a computer program accessible from any computer-readable device, carrier, or media. By way of example, computer readable media may include, but are not limited to, magnetic storage devices (eg, hard disks, floppy disks, magnetic strips, etc.), optical devices (eg, compact discs (CD), digitally versatile discs (DVD) Etc.), smart card and flash memory devices (eg EPROM, cards, sticks, key drives, etc.). Additionally, various storage media described herein can represent one or more devices and/or other machine-readable media for storing information. The term "machine-readable medium" may include, but is not limited to, wireless channels and various other media capable of storing, containing, and/or carrying instructions and/or data.

The techniques described herein can be used in a variety of wireless communication systems, such as multiple access communication systems, broadcast systems, wireless local area networks (WLANs), and the like. The terms "system" and "network" are often used interchangeably. Multiple access systems may utilize, for example, code division multiple access (CDMA), time division multiple access (TDMA), frequency division multiple access (FDMA), orthogonal FDMA (OFDMA), single carrier FDMA (SC-FDMA), etc. Multiple access mechanisms. Multiple access systems may also utilize a combination of multiple access mechanisms, such as one or more multiple access mechanisms for the downlink and one or more multiple access mechanisms for the uplink.

OFDMA utilizes orthogonal frequency division multiplexing (OFDM), which is a multi-carrier multiplexing mechanism. SC-FDMA may utilize regionalized frequency division multiplexing (LFDM), interleaved FDM (IFDM), enhanced FDM (EFDM), etc., which are different single carrier multiplex mechanisms collectively referred to as single carrier FDM (SC-FDM). OFDM and SC-FDM divide the system bandwidth into a plurality of (K) orthogonal subcarriers, and these orthogonal subcarriers may also be collectively referred to as carrier frequency modulation, bin (bin), and the like. Each subcarrier can be modulated by data. In general, the modulation symbols are transmitted by OFDM in the frequency domain and the modulation symbols are transmitted by SC-FDM in the time domain. The LFDM transmits data on consecutive subcarriers, the IFDM transmits data on subcarriers distributed across the system bandwidth, and the EFDM transmits data on a group of consecutive subcarriers.

OFDM has certain desirable features, including the ability to combat the multipath effects that are common in terrestrial communication systems. However, the main disadvantage of OFDM is the higher peak-to-average power ratio (PAPR) of the OFDM waveform, that is, the ratio of the peak power to the mean power of the OFDM waveform can be higher. A higher PAPR is caused by the possible in-phase (or coherent) addition of all subcarriers as they are independently modulated by the data. The high PAPR of an OFDM waveform is undesirable and can degrade performance. For example, a larger peak in the OFDM waveform may cause the power amplifier to operate or possibly clip in a highly non-linear region, which in turn may cause intermodulation distortion and degrade signal quality. Other artifacts. To avoid non-linearities, the power amplifier can operate at a post-shift below the average power level of the peak power level. By operating the power amplifier after shifting from peak power (wherein, in one example, the back shift can vary between 4 dB and 7 dB), the power amplifier can process larger peaks in the waveform without producing excessive distortion.

SC-FDM (e.g., LFDM) has certain desirable features, such as robustness against multipath effects similar to OFDM. Furthermore, SC-FDM does not have a high PAPR because the modulated symbols are transmitted in the time domain by SC-FDM. The PAPR of the SC-FDM waveform is determined by the signal points in the selected signal group (e.g., M-PSK, M-QAM, etc.). However, due to the non-flat communication channel, the time domain modulation symbols in the SC-FDM are susceptible to inter-symbol interference. The equalization of the received symbols can be performed to mitigate the deleterious effects of intersymbol interference.

In one aspect, OFDM and SC-FDM (e.g., LFDM) can be used for transmission over a given link (e.g., uplink). In general, the link efficiency of an OFDM waveform exceeds the link efficiency of an SC-FDM waveform. The higher link efficiency of OFDM is offset by the back-shift of OFDM's larger power amplifier than SC-FDM. SC-FDM therefore has a lower PAPR advantage over OFDM. For UEs with higher signal-to-noise ratio (SNR), the link-level gain of OFDM can exceed the PAPR advantage of SC-FDM. By utilizing OFDM and SC-FDM, the system can benefit from the higher link efficiency of OFDM in high SNR situations and benefit from the PAPR advantage of SC-FDM in low SNR situations.

In general, any SC-FDM mechanism can be used in conjunction with OFDM. In addition, OFDM and SC-FDM can be used in combination for uplink or downlink or uplink and downlink. For the sake of clarity, most of the following description is directed to the joint use of OFDM and LFDM on the uplink.

Referring now to Figure 1, a block diagram of a system 100 for providing dynamic power amplifier post shifting is illustrated. System 100 includes at least one base station 102 and at least one mobile device 104 supported by a sector of base station 102. The term sector may refer to a base station and/or an area covered by a base station, depending on the context. For the sake of simplicity, a single base station and mobile equipment are described. However, system 100 can include multiple base stations and mobile devices. The base station 102 can explicitly control the sub-band scheduling of the mobile device 104. The sub-band scheduling achieves multi-user diversity gain by adaptively scheduling mobile devices over a limited area of the system band based on channel conditions and other factors. The sub-band size provides sufficient frequency diversity to prevent performance degradation of fast mobile mobile devices and degradation of sector throughput under the same level of service scheduling. Smaller sub-bands can also result in loss of relay efficiency for sub-band scheduling (eg, the smaller the sub-band, the fewer candidate mobile devices per sub-band). Although in some cases, scheduling algorithms such as the scheduling algorithms described herein may schedule assignments on a sub-band basis (eg, one or more sub-bands), they may be assigned in other units as well. , such as one or more of the basic nodes as described below.

Turning briefly to Figure 2, an illustrative channel tree with local hops is illustrated. A mobile device that is scheduled within a particular subband and has a bandwidth assignment that is less than the entire subband may be locally hopped across the subband to maximize channel interference diversity. In Figure 2, each base node can be mapped to a number of consecutive carrier tones in frequency (e.g., 16 as shown). The set of eight basic nodes is mapped to a sub-band consisting of 128 consecutive carrier frequency modulations. Within the subband, 16 sets of carrier tones (eg, base nodes) can hop in a pseudo-random manner. In addition to the sub-band scheduling mode, the diversity mode can also be beneficial. A sector can primarily serve fast moving users (eg, covering a sector of a highway). In such cases, the base node of the channel can jump across the entire frequency band.

Referring back to FIG. 1, in an example, to support sub-band scheduling, the mobile device 104 can provide feedback to the base station 102 regarding the nature of the forward link channel associated with the different sub-bands. The amount of feedback can, for example, be attributed to the gain in the forward link performance of the sub-band schedule relative to the reverse link burden caused by the feedback channel. The appropriate trade-off depends on the load of the reverse link control channel, which can carry other reverse link control information in addition to the sub-band schedule feedback.

In accordance with one aspect of the present disclosure, mobile device 104 transmits power restriction information to base station 102. The base station 102 uses the received power restriction information to schedule the mobile device 104 on the secondary frequency band. The power limit information may include information related to the power amplifier (PA) size and/or capabilities of the mobile device 104. In addition, the power limit information can include different power levels that can be used for different types of assignments. For example, mobile device 104 can have one or more power levels available in an internal sub-band while having one or more disparate power levels available on the edge sub-band. The mobile device 104 can also report its achievable maximum power if it is assigned across, for example, the entire bandwidth, an internal sub-band, and/or a single base node. In addition, this information can convey the effects of interference constraints, if any. Further, the power limit information may include location within a given sector or cell and/or location information for more than one sector or cell. Additionally, the power restriction information transmitted by the mobile device 104 can include carrier interference parameters experienced by the mobile device 104. Although FIG. 1 depicts mobile device 104 transmitting power limiting information to base station 102, it should be appreciated that base station 102 can infer this information from its links and communications with mobile device 104. For example, base station 102 can evaluate the received power level or received feedback to infer any power constraints imposed on mobile device 104.

The base station 102 uses power limiting information to schedule the mobile device 104 on the secondary frequency band available to the system 100. In accordance with one aspect of the present disclosure, base station 102 can primarily schedule power limited mobile devices on internal subbands. Mobile devices without power limitation can be scheduled on the remaining spectrum. In an example, base station 102 may consider the power limit of mobile device 104 in addition to channel selectivity across the sub-band when selecting the sub-band. In addition, base station 102 can transmit scheduling information to sub-bands indicating that the mobile device 104 is to be used by mobile device 104.

Referring now to Figure 3, a wireless communication system 300 in accordance with various embodiments presented herein is illustrated. System 300 includes a base station 302 that can include multiple antenna groups. For example, one antenna group can include antennas 304 and 306, another group can include antennas 308 and 310, and additional groups can include antennas 312 and 314. Two antennas are illustrated for each antenna group, however, each group may utilize more or fewer antennas. As will be appreciated by those skilled in the art, base station 302 can additionally include a transmitter chain and a receiver chain, each of which can include a plurality of components (e.g., processor, modulation) associated with signal transmission and reception. , multiplexer, demodulation transformer, demultiplexer, antenna, etc.).

The base station 302 can communicate with one or more mobile devices, such as the mobile device 316 and the mobile device 322; however, it should be understood that the base station 302 can communicate with virtually any number of mobile devices similar to the mobile devices 316 and 322. Mobile devices 316 and 322 can be, for example, cellular phones, smart phones, laptops, handheld communication devices, handheld computing devices, satellite radios, global positioning systems, PDAs, and/or for use via wireless communication systems Any other suitable device for 300 communications. As depicted, mobile device 316 is in communication with antennas 312 and 314, wherein antennas 312 and 314 transmit information to mobile device 316 via forward link 318 and receive information from mobile device 316 via reverse link 320. In addition, mobile device 322 is in communication with antennas 304 and 306, wherein antennas 304 and 306 transmit information to mobile device 322 via forward link 324 and receive information from mobile device 322 via reverse link 326. For example, in a frequency division duplex (FDD) system, forward link 318 can utilize a different frequency band than that used by reverse link 320, and forward link 324 can be used with reverse link 326. Bands with different frequency bands. Additionally, in a time division duplex (TDD) system, forward link 318 and reverse link 320 can use a common frequency band, and forward link 324 and reverse link 326 can use a common frequency band.

Each group of antennas and/or the area in which they are designated to communicate may be referred to as a sector of base station 302. For example, an antenna group can be designed to communicate with a mobile device in a sector of the area covered by the base station 302. In communication via forward links 318 and 324, the transmit antenna of base station 302 can utilize beamforming to improve the signal to noise ratio of mobile devices 316 and 322 to links 318 and 324. Furthermore, although base station 302 utilizes beamforming to transmit to randomly dispersed mobile devices 316 and 322 via associated coverage, mobile devices in neighboring cells are compared to base stations transmitted to all mobile devices via a single antenna. Can withstand less interference. According to an example, system 300 can be a multiple input multiple output (MIMO) communication system. Additionally, system 300 can utilize any type of duplexing technique to divide communication channels (eg, forward link, reverse link, ...), such as FDD, TDD, and the like.

Turning now to Figure 4, illustrated is a wireless communication system 400 that implements sub-band scheduling based on considerations of power limitations. System 400 includes a base station 402 that communicates with mobile device 404 (and/or any number of disparate mobile devices (not shown)). The base station 402 can transmit information to the mobile device 404 via the forward link channel; in addition, the base station 402 can receive information from the mobile device 404 via the reverse link channel. Additionally, system 400 can be a MIMO system.

System 400 uses a mitigation technique that reduces the effects of nonlinear distortion on the spectral mask margin. Nonlinear distortion is a phenomenon related to, for example, a nonlinear relationship between the input and output of an electronic device. According to one aspect, the nonlinear relationship of interest is related to the power amplifier.

The mobile device 404 can include a power limit indicator 410, a back shift estimator 412, and a power amplifier 414. The power limit indicator 410 of the mobile device 404 determines a power limit indication that reflects the power constraints imposed on the mobile device 404. Mobile device 404 transmits a power limit indication to base station 402. It should be appreciated that base station 402 can also infer this information from its links and communications with mobile device 404. For example, base station 402 can evaluate the received power level or received feedback to determine the power constraints imposed on mobile device 404. The power limit indication may include information related to the power amplifier size or capability of the mobile device 404. Additionally, the power limit indicator 410 can convey the effects of interference constraints, if any. Further, the power limit information may include location within a given sector or cell and/or location information for more than one sector or cell. Additionally, the power restriction information transmitted by the mobile device 404 can include carrier interference parameters experienced by the mobile device 404.

Base station 402 receives a power limit indication from mobile device 404 and uses the indication to determine a sub-band schedule. The base station 402 includes a subband selector 406 and a subband scheduler 408. The sub-band selector 406 selects the sub-band based on the power limit indication for the mobile device 404 and the channel selectivity across the sub-band. The sub-band scheduler 408 schedules the mobile device 404 and other mobile devices served by the base station 402. In accordance with one aspect of the present disclosure, the sub-band scheduler 408 primarily schedules mobile devices with power limitations on the internal sub-band. For example, a high quality of service (QoS) user with a limited power amplifier size at the sector or cell edge can be scheduled on the internal subband. It is also possible to schedule the user of the best-effort service at the sector or cell edge without interference control (for example, the user's transmission power is not limited by the busy bit from the neighboring sector) within the spectrum configuration. On the sub-band. In addition, sub-band scheduler 408 can schedule non-power limited mobile devices on the remaining spectrum. For example, after scheduling a power-constrained user, it is subject to interference control at the sector or cell edge (eg, the user's transmission power is limited by busy bits from neighboring sectors). The user of the best effort service is scheduled to be on the rest of the spectrum. In addition, users with larger power amplifier sizes and users with higher carrier-to-interference (C/I) ratios can be scheduled on the remaining spectrum configured. A user with a high C/I can only marginally benefit from a further increase in C/I, in one example, a further increase in C/I can be caused by scheduling on the middle region of the configured spectrum. .

The internal subband is a subband that is far from the edge of the spectrum configuration or total bandwidth. The out-of-band transmission is a transmission caused by the modulation process at a frequency that is immediately outside the configured bandwidth and/or at a distance from the configured bandwidth. The total bandwidth traversed by the out-of-band transmission level quasi-view assignment and the span is determined by the proximity of the edge of the spectrum configuration or the maximum bandwidth of the system. In general, the greater the span of assignments (eg, wide assignments), the higher the out-of-band transmission level will be. In addition, the assignment away from the edge results in a lower out-of-band transmission level. The out-of-band transmission level can be measured as a function of the total power at 1 MHz adjacent to the channel configuration. According to an example, the total transmitted power accumulated at 1 MHz should not exceed -13 dBm. In addition, for a mean transmission power of typically 23 dBm, the spectral mask requires approximately 30 dB of attenuation in the vicinity of 1 MHz.

The spectral mask margin is defined as the difference between the allowed transmission level and the actual transmission level. The spectral mask margin L _mask can be given by:

According to this description, the P _mask can be a mask limit. According to an example, the P _mask should not exceed -13 dBm. P _TX can represent the total transmission power. S ( f ) may represent the power spectral density at the output of the power amplifier, for example, where the number ∫ s ( f ) df may represent the power in the frequency band in which the integration takes. For example, quantity It can be power at 1 MHz that is configured adjacent to the channel. A positive value indicates the margin between the allowed transfer level and the actual transfer level. A negative value indicates that the allowed transmission level is exceeded.

If the mobile device 404 uses a large backshift or is given a smaller assignment, the mobile device 404 has sufficient margin in both the edge subbands in the OFDMA and LFDMA systems. In the case where the mobile device 404 uses a small back shift, the OFDMA device experiences a negative margin for medium and large assignments, while the LFDMA user experiences a smaller positive margin for medium assignments. For users scheduled on the middle or internal sub-band, the users experience a positive margin in both the OFDMA system and the LFDMA system with low back shift. By scheduling the user in the middle subband, both OFDMA and LFDMA have sufficient spectral mask margin, even after shifting below 0 dB, indicating that both can operate at low post-shifts. Therefore, the PAPR disadvantage of OFDMA relative to LFDMA does not affect its power efficiency when scheduling the user away from the edge of the spectrum configuration.

The base station 402 can transmit assignment and scheduling information to the mobile device 404. The mobile device 404 includes a back migration evaluator 412 to determine that the power amplifier 414 is moving backward based on the scheduling information. The back migration evaluator 412 may determine a larger back shift when the schedule information received by the mobile device 404 indicates that it is scheduled to be among the edge subbands or a larger assignment. Typically, this back shift for an OFDMA system can be about 2 dB larger than that used for LFDMA systems to maintain a similar margin for the spectral mask. However, if the sub-band scheduler 408 indicates that the mobile device is scheduled on the middle or inner sub-band, the back-shift evaluator 412 can determine, for example, a low back-shift sufficient to maintain sufficient margin for the spectral mask. In accordance with an aspect, the back shift evaluator 412 can adjust the power amplifier 414 to use a lower back shift (e.g., higher transmit power) while the mobile device 404 is scheduled on the internal subband. When placed on the edge sub-band, power amplifier 414 can operate with a higher back-shift (eg, lower transmission power). Also, consider the width of the assignment. For example, in an example, when only mobile device 404 is scheduled on 16 consecutive carriers (eg, one base node), the out-of-band transmission is as if it were assigned to be contiguous and traversing the narrow portion of the total bandwidth. low. In this case, low back shift and high transmission power can be tolerated.

According to an example, the power limit indicator 410 can include and/or determine power amplifier header spatial information about the mobile device 404; in an example, the power amplifier header spatial information is related to the maximum achievable transmission of the mobile device 404 and / or receive power. This information can be transmitted to the base station 402 for calculation of, for example, power amplifier header spatial information; the power amplifier header spatial information is about the maximum achievable received power of the base station 402, which corresponds to the maximum achievable reach of the mobile device 404. Transmission power. For example, this may be calculated for a given point or possible broadband assignment of interest, such as for an edge of a sub-band, an internal sub-band, and/or for a single base node (eg, as described with reference to Figure 2) This is calculated. According to an example, an out-of-band report (eg, via a dedicated control channel) and/or an in-band report (eg, as part of a data packet, such as during a reverse link channel assignment and/or the like) may be reported (eg, as part of a data packet) The information is transmitted from the mobile device 404 to the base station 402 periodically within its Media Access Control (MAC) header. In an example, this information can be used for actual broadband assignments. In addition, mobile device 404 can notify static difference power header space information corresponding to possible wideband assignments and/or points of interest as previously listed; it should be appreciated that this information can remain relatively static over time. At this point, base station 402 can calculate a type of broadband assignment or point of interest by adding a corresponding static difference power header space to the power header space of the corresponding periodic report of the corresponding periodicity. Power header space. For example, the sub-bands may be selected by the sub-band selector 406 and/or scheduled by the sub-band scheduler 408 based at least in part on this information.

Referring now to Figure 5, a wireless communication system 500 in accordance with various aspects set forth herein is illustrated. System 500 can include one or more access points 502 that receive, transmit, relay (equal) wireless communication signals to one another, and receive, transmit, and communicate with one or more terminal machines 404. Relay (etc.) wireless communication signals. Each base station 502 can include multiple transmitter chains and receiver chains (eg, one for each transmit and receive antenna), each of which can include a plurality of components associated with signal transmission and reception (eg, processing) , modulator, multiplexer, demodulation transformer, demultiplexer, antenna, etc.). The terminal 504 can be, for example, a cellular telephone, a smart phone, a laptop, a palm-sized communication device, a palm-sized computing device, a satellite radio, a global positioning system, a PDA, and/or for communicating via the wireless system 500. Any other suitable device. Additionally, each terminal machine 504 can include, for example, one or more transmitter chains and receiver chains for a multiple input multiple output (MIMO) system. As will be appreciated by those skilled in the art, each transmitter and receiver chain can include a plurality of components associated with signal transmission and reception (eg, processors, modulators, multiplexers, demodulators, Solve multiplexers, antennas, etc.).

As illustrated in FIG. 5, each access point provides communication coverage for a particular geographic area 506. The term "cell" may refer to an access point and/or its coverage area depending on the context. To improve system capabilities, the access point footprint can be partitioned into multiple smaller regions (eg, three smaller regions 508A, 508B, and 508C). Each smaller zone is serviced by a separate base station transceiver subsystem (BTS). The term "sector" may refer to a BTS and/or its coverage area depending on the context. For a sectorized cell, the base station transceiver subsystems for all sectors of the cell are typically co-located within the access point of the cell.

Terminals 504 are typically dispersed throughout system 500. Each terminal 504 can be fixed or mobile. Each terminal 504 can communicate with one or more access points 502 on the forward and reverse links at any given time.

For a centralized architecture, system controller 510 is coupled to access point 502 and provides coordination and control of access point 502. For a decentralized architecture, access points 502 can communicate with each other as needed. Communication between access points via system controller 510 or the like may be referred to as backhaul signal transmission.

The techniques described herein are applicable to systems 500 having sector cells and systems having non-sector cells. For the sake of clarity, the following description is directed to a system with sector cells. The term "access point" is generally used for fixed stations that serve sectors and fixed stations that serve cells. The terms "terminal" and "user" are used interchangeably and the terms "sector" and "access point" are used interchangeably. The service access point/sector is the access point/sector that communicates with the terminal. Adjacent access points/sectors are access points/sectors that do not communicate with the terminal.

Referring to Figures 6 through 8, a method for reverse link power adjustment based on broadcast interference information is illustrated. Although the method is shown and described as a series of acts for the sake of simplicity of the description, it should be understood and understood that the method is not limited by the order of the acts, as some acts may be shown and described herein in accordance with one or more embodiments. Different orders appear and/or appear simultaneously with other actions. For example, those skilled in the art will understand and appreciate that the method may alternatively be represented as a series of related states or events, such as in the form of a state diagram. In addition, the method may be practiced without all of the described acts in accordance with one or more embodiments.

Turning to FIG. 6, a method 600 for facilitating scheduling of a mobile device on a secondary frequency band based on consideration of a power limiting indicator in a wireless communication system is illustrated. At reference numeral 602, a power limit indicator is received. The power limit indicator may include information related to power amplifier size or capability, presence of interference constraints (if any), location within a given sector or cell, and/or location information and actions with respect to more than one sector or cell. Carrier interference parameters and other content experienced by the device. At reference numeral 604, the sub-band is selected. The selection may be based on at least one of a power limitation of the mobile device, a channel selectivity across the secondary frequency band, and/or the like. At reference numeral 606, the mobile device is scheduled on the sub-band. The schedule is based on the received power limit indicator. For example, the power limited user is scheduled on the internal subband and the unpower limited mobile device is scheduled on the remainder of the spectrum configuration.

Turning to Figure 7, a method 700 for facilitating adjustment of the power amplifier back-shift based on considerations of power limiting and sub-band scheduling information is illustrated. At reference numeral 702, the power limit indicator is transmitted to, for example, a base station or an access point. The power limit indicator may include information related to power amplifier size or capability, presence of interference constraints (if any), location within a given sector or cell, and/or location information and actions with respect to more than one sector or cell. Carrier interference parameters and other content experienced by the device or access terminal. At reference numeral 704, sub-band scheduling information is received. The sub-band scheduling information may include the sub-band to be used in the configured spectrum. For example, the schedule information may indicate that the internal sub-band is to be utilized. At reference numeral 706, scheduling information is used to evaluate the power amplifier back-off to be applied to the power amplifier. For example, if the schedule information indicates the utilization of the internal sub-band, a low back shift can be determined. Conversely, if the information indicates that the edge subband is to be utilized, then a high back shift can be determined to maintain sufficient spectral mask margin.

Referring to Figure 8, a method 800 for facilitating transmission of information via an uplink signal in conjunction with obtaining a scheduled sub-band assignment for transmission is illustrated. At 802, information including power limiting can be signaled to the base station via the reverse link. According to an example, information can be sent as part of the request; however, the claimed subject matter is not so limited. At 804, a sub-band assignment can be obtained from the base station, wherein the assignment can be generated based at least in part on the information transmitted by the signal. For example, the base station can use the information transmitted by the signal to determine one or more spectral mask margins for the user to signal the information. In addition, the base station can consider such margins in conjunction with generating sub-band assignments. At 806, traffic can be transmitted over the reverse link by using subband assignments. Thus, reverse link transmission can be achieved, for example, by frequency, time, rate, etc., specified in the subband assignment.

It will be appreciated that in accordance with one or more aspects described herein, inferences can be made regarding determining power limits, determining which users are scheduled on the internal subband, determining the appropriate power amplifier back shift, and the like. As used herein, the term "inference" generally refers to the process of capturing a set of observations from an event and/or data to initiate or infer the state of the system, environment, and/or user. Inference can be used to identify a particular situation or action, or, for example, can generate a probability distribution over a state. Inference can be probabilistic, that is, based on the consideration of data and events, the calculation of the probability distribution over the state of interest. Inference can also refer to techniques used to construct higher order events from a set of events and/or data. Whether or not the event is closely related in time, and regardless of whether the event and the data are from one or several events and data sources, the inference generates a new event or action construct from a set of observed events and/or stored event data. .

According to an example, one or more of the methods set forth above can include making an inference regarding scheduling a mobile device on a sub-band of the configured spectrum based at least in part on consideration of power limiting information. By way of further explanation, an inference can be made regarding determining the power amplifier back shift based on consideration of the sub-band scheduling. It is to be understood that the above-described examples are illustrative in nature and are not intended to limit the number of such inferred embodiments or the manner in which the various embodiments and/or methods described herein are.

9 is an illustration of a mobile device 900 that facilitates adjusting reverse link power based on consideration of broadcast interference information. Mobile device 900 includes a receiver 902 that receives signals from, for example, a receiving antenna (not shown) and performs typical actions on the received signals thereon (eg, filtering, amplifying, downconverting, etc.) And digitizing the conditioned signal to obtain a sample. Receiver 902 can be, for example, an MMSE receiver, and can include a demodulation transformer 904 that can demodulate the received symbols and provide them to processor 906 for channel estimation. The processor 906 can be: a processor dedicated to analyzing information received by the receiver 902 and/or generating information for transmission by the transmitter 916; a processor controlling one or more components of the mobile device 900; And/or a processor that analyzes information received by the receiver 902, generates information for transmission by the transmitter 916, and controls one or more components of the mobile device 900.

The mobile device 900 can additionally include a memory 908 operatively coupled to the processor 906 and can store data to be transmitted, received data, information related to available channels, and analyzed signals and/or Or information relating to the intensity of the interference, information relating to the assigned channel, power, rate or analogue thereof and any other suitable information used to estimate a channel and communicate via the channel. Memory 908 can additionally store protocols and/or algorithms associated with estimating and/or utilizing a channel (eg, based on performance, capacity based, etc.).

It should be understood that the data storage (eg, memory 908) described herein can be volatile memory or non-volatile memory, or can include volatile memory and non-volatile memory. By way of illustration and not limitation, non-volatile memory may include read only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable PROM (EEPROM), or fast Flash memory. Volatile memory can include random access memory (RAM), which acts as external cache memory. By way of illustration and not limitation, RAM is available in many forms, such as synchronous RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), dual data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronization. Link DRAM (SLDRAM) and direct Rambus RAM (DRRAM). The memory 908 of the claimed system and method is intended to comprise, but is not limited to, such or any other suitable type of memory.

The processor 906 is further operatively coupled to a power limit indicator 910 that determines a power limit of the mobile device 900. The power limit may include information related to the power amplifier size or capability of the mobile device 900. In addition, the indicator can convey the effects of interference constraints, if any. Further, the power limit information may include location within a given sector or cell and/or location information for more than one sector or cell. Additionally, the power restriction information transmitted by the mobile device 900 can include carrier interference parameters experienced by the mobile device 900. The power limit indicator 910 transmits the power limit to the base station or access point via the transmitter 916. Additionally, the receiver 902 is coupled to a back estimator that can utilize the subband schedule information received from the base station or access point to determine an appropriate back shift for the power amplifier of the mobile device 900. Mobile device 900 further includes a modulator 914 and a transmitter 916 that transmits signals (e.g., power limit indicators) to, for example, a base station, another mobile device, or the like. Although depicted as being separate from processor 906, it should be appreciated that power limit indicator 910, back shift evaluator 912, and/or modulator 914 can be part of processor 906 or a number of processors (not shown).

10 is an illustration of a system 1000 that facilitates reducing the amount of feedback required to control forward link transmission in a MIMO system implementing a PGRC mechanism. System 1000 includes a base station 1002 (e.g., an access point...) having a receiver 1010 that receives signals from one or more mobile devices 1004 via a plurality of receive antennas 1006 and to one or via transmit antennas 1008 A transmitter 1024 that is transmitted by a plurality of mobile devices 1004. Receiver 1010 can be operatively associated with receive antenna 1006 and operatively associated with demodulation transformer 1012 that demodulates the information received by the transformer. The demodulated symbol is analyzed by processor 1014, which may be similar to the processor described above with reference to FIG. 9 and coupled to memory 1016, which stores and estimates signals (eg, Pilot) information about strength and/or interference strength, to be transmitted to mobile device 1004 (or disparate base station (not shown)) or to be received from mobile device 1004 (or disparate base station (not shown)) Information and/or any other suitable information related to performing the various actions and functions set forth herein. The processor 1014 is further coupled to the subband selector 1018 that selects the subband. The sub-band selector 1018 selects the sub-band based on the power limit indication for the mobile device and the channel selectivity across the sub-band.

The sub-band selector 1018 is coupled to the sub-band scheduler 1020. The sub-band scheduler 1020 schedules the mobile device 1004 based on consideration of power limiting information received from the mobile device 1004. For example, a mobile device with power limitation is scheduled on the internal sub-band and a non-power limited mobile device is scheduled for the remainder of the configured spectrum. The modulator 1022 can multiplex control information for transmission by the transmitter 1024 to the mobile device 1004 via the antenna 1008. Mobile device 1004 can be similar to mobile device 900 described with reference to Figure 9 and uses sub-band scheduling to adjust power amplifier back-shift. It should be understood that other functions may be utilized in accordance with the present disclosure. Although depicted as being separate from processor 1014, it should be appreciated that subband selector 1018, subband scheduler 1020, and/or modulator 1022 can be part of processor 1014 or a number of processors (not shown).

FIG. 11 shows an example wireless communication system 1100. For brevity, the wireless communication system 1100 depicts a base station 1110 and a mobile device 1150. However, it should be appreciated that system 1100 can include more than one base station and/or more than one mobile device, wherein the additional base stations and/or mobile devices can be substantially similar or different than example base station 1110 and mobile device 1150 described below. In addition, it should be understood that the base station 1110 and/or the mobile device 1150 can use the systems described herein (Figs. 1, 3 to 5, and 9 through 10) and/or methods (Figs. 6-8) to facilitate Wireless communication.

At base station 1110, traffic data for a number of data streams is provided from data source 1112 to a transport (TX) data processor 1114. According to an example, each data stream can be transmitted via a separate antenna. TX data processor 1114 provides encoded data based on formatting, encoding, and interleaving the traffic data stream based on a particular encoding mechanism selected for the data stream.

The encoded data and pilot data for each data stream can be multiplexed by using orthogonal frequency division multiplexing (OFDM) techniques. Alternatively or additionally, the pilot symbols may be frequency division multiplexed (FDM), time division multiplexed (TDM), or code division multiplexed (CDM). The pilot data is typically a known data pattern processed in a known manner and can be used at the mobile device 1150 to estimate the channel response. The multiplexed pilot and encoded data for each data stream can be based on a particular modulation mechanism that is selected for use in its data stream (eg, binary phase shift keying (BPSK), quadrature phase shift keying (QPSK), M-phase phase shift keying (M-PSK), M-quadrature amplitude modulation (M-QAM), etc. are modulated to provide modulation symbols. The data rate, encoding, and modulation of each data stream may be determined by instructions executed or provided by processor 1130.

The modulation symbols of the data stream may be provided to a TX MIMO processor 1120, which may further process the modulated symbols (eg, for OFDM). TX MIMO processor 1120 then provides N _T 1122a through 1122t th modulation symbol streams to N _T transceivers (TMTR / RCVR). In various embodiments, TX MIMO processor 1120 applies beamforming weights to the symbols of the data stream and to the antenna from which the symbol is being transmitted.

Each transceiver 1022 receives and processes a respective symbol stream to provide one or more analog signals, and further conditions (e.g., amplifies, filters, and upconverts) the analog signals to provide modulation suitable for transmission via MIMO channels. signal. Further, 1122a through 1122t number N _T of the modulated signal from the transceiver are transmitted from N _T antennas 1124a through 1124t.

In the mobile device 1150, and provided to the respective receiving transceiver (TMTR / RCVR) 1154a through 1154r of the signal from each antenna 1152 receives the N _R antennas 1152a through 1152r to transmission of the modulated signal. Each transceiver 1154 conditions (eg, filters, amplifies, and downconverts) the respective signals, digitizes the conditioned signals to provide samples, and further processes the samples to provide a corresponding "received" symbol stream.

RX data processor 1160 may receive and process the received symbol streams such symbol stream based on a particular receiver processing technique to provide N _T th "to the detected" symbol streams from N _R transceivers 1154 the number N _R. The RX data processor 1160 can demodulate, deinterlace, and decode each detected symbol stream to recover the traffic data of the data stream. The processing performed by RX data processor 1160 is complementary to the processing performed by TX MIMO processor 1020 and TX data processor 1114 at base station 1110.

As discussed above, the processor 1170 can periodically determine which precoding matrix to utilize. Additionally, processor 1170 can list a reverse link message comprising a matrix index portion and a level value portion.

The reverse link message may contain various types of information about the communication link and/or the received data stream. The reverse link message may be processed by TX data processor 1138 (which also receives traffic data from a plurality of data streams of data source 1136), modulated by modulator 1180, adjusted by transceivers 1154a through 1154r, and transmitted back to Base station 1110.

At base station 1110, the modulated signal from mobile device 1150 is received by antenna 1124, adjusted by transceiver 1122, demodulated by demodulation transformer 1140, and processed by RX data processor 1142 for extraction by mobile device 1150. Reverse link message. Additionally, processor 1130 can process the extracted message to determine which precoding matrix to use to determine beamforming weights.

Processors 1130 and 1170 can direct (e.g., control, coordinate, manage, etc.) operations at base station 1110 and mobile device 1150, respectively. The respective processors 1130 and 1170 can be associated with memory 1132 and 1172 that store code and data. Processors 1130 and 1170 can also perform computations to derive frequency and impulse response estimates for the uplink and downlink, respectively.

It should be understood that the embodiments described herein can be implemented in hardware, software, firmware, intermediate software, microcode, or any combination thereof. For hardware implementation, the processing unit can be constructed in one or more special application integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field A programmed gate array (FPGA), processor, controller, microcontroller, microprocessor, other electronic unit designed to perform the functions described herein, or a combination thereof.

When an embodiment is implemented in a software, firmware, intermediate software or microcode, code or code segment, it can be stored in a machine readable medium such as a storage component. A code segment can represent a program, a function, a subroutine, a program, a routine, a subroutine, a module, a software package, a class, or any combination of instructions, data structures, or program descriptions. A code segment can be coupled to another code segment or a hardware circuit by transmitting and/or receiving information, data, arguments, parameters, or memory content. Information, arguments, parameters, data, etc. can be transmitted, forwarded, or transmitted by any suitable means (including memory sharing, messaging, token transfer, network transmission, etc.).

For software implementations, the techniques described herein can be implemented by modules (eg, procedures, functions, etc.) that perform the functions described herein. The software code can be stored in the memory unit and executed by the processor. The memory unit can be constructed within the processor or external to the processor, and in the case of being external to the processor, the memory unit can be communicatively coupled to the processor via various means known in the art.

Referring to Figure 12, a system 1200 that facilitates generating interference indications to be broadcast to a plurality of mobile devices is illustrated. For example, system 1200 can reside at least partially within a base station. It will be appreciated that system 1200 is represented as including functional blocks that can be functional blocks representing functions implemented by a processor, software, or combination thereof (e.g., firmware). System 1200 includes a logical grouping 1202 of electrical components that can be combined. For example, logical grouping 1202 can include circuitry for scheduling the first group on an internal sub-band of the configured spectrum based at least in part on power amplifier header space information from the first group of at least one mobile device Component 1204. For example, a power limited mobile device can be scheduled on an internal sub-band of the configured spectrum. As described above, according to an example, the power amplifier header spatial information can include periodic information as well as static difference information. Additionally, logical grouping 1202 can include an electrical component 1206 for scheduling the subsequent group on a remaining portion of the configured spectrum based at least in part on power amplifier header spatial information from a subsequent set of at least one mobile device. For example, a power-limited mobile device can be assigned to the remainder of the configured spectrum after scheduling the power-limited mobile device based on the power amplifier header spatial information as described. Moreover, logical grouping 1202 can include an electrical component 1208 for selecting a sub-band based at least in part on power amplifier header spatial information. According to an example, the sub-bands can be selected based on power constraints on the mobile device and channel selectivity across the sub-bands. Additionally, system 1200 can include a memory 1210 that retains instructions for executing functions associated with electrical components 1204, 1206, and 1208. Although shown external to memory 1210, it should be understood that one or more of electrical components 1204, 1206, and 1208 may be present within memory 1210.

Turning to Figure 13, a system 1300 for adjusting power on the reverse link is illustrated. For example, system 1300 can reside in a mobile device. As depicted, system 1300 includes functional blocks that can represent functions implemented by a processor, software, or combination thereof (eg, firmware). System 1300 includes a logical grouping 1302 of electrical components that facilitate control of forward link transmissions. Logical grouping 1302 can include an electrical component 1304 for transmitting periodic power headspace measurements corresponding to the maximum achievable transmit power for the wideband assignment. For example, periodic measurements can be made as the device moves throughout the service area. Moreover, logical grouping 1302 can include an electrical component 1306 for notifying a static difference power header space corresponding to one or more points of interest. For example, as described, the points of interest may include internal subbands, edge subbands, and/or a single base node. Therefore, the periodic measurement result can be added to one or more of the static difference dynamics at the transmitting end to derive the calculated power header space for selecting the sub-band. Additionally, system 1300 can include a memory 1308 that retains instructions for performing functions associated with electrical components 1304 and 1306. Although shown external to memory 1308, it should be understood that electrical components 1304 and 1306 can be present within memory 1308.

What has been described above includes examples of one or more embodiments. Of course, it is not possible to describe every hypothetical combination of components or methods for the purpose of describing the foregoing embodiments, but those skilled in the art will recognize that many other combinations and permutations of various embodiments are possible. Accordingly, the described embodiments are intended to embrace all such changes, modifications and variations in the scope of the invention. Furthermore, to the extent that the term "comprises" is used in the context of the detailed description or the scope of the claims, the term is intended to be interpreted in a manner similar to the term "comprising" when "contained" is used as a transitional word in the scope of the patent application. For inclusion.

100. . . system

102. . . Base station

104. . . Mobile device

300. . . Wireless communication system

302. . . Base station

304. . . antenna

306. . . antenna

308. . . antenna

310. . . antenna

312. . . antenna

314. . . antenna

316. . . Mobile device

318. . . Forward link

320. . . Reverse link

322. . . Mobile device

324. . . Forward link

326. . . Reverse link

400. . . Wireless communication system

402. . . Base station

404. . . Mobile device/terminal

406. . . Subband selector

408. . . Subband scheduler

410. . . Power limit indicator

412. . . Back shift evaluator

414. . . Power amplifier

500. . . Wireless communication system

502. . . Access point/base station

504. . . Terminal

506. . . Geographical area

508A. . . Area

508B. . . Area

508C. . . Area

510. . . System controller

600. . . method

602. . . Reference number

604. . . Reference number

606. . . Reference number

700. . . method

702. . . Reference number

704. . . Reference number

706. . . Reference number

800. . . method

900. . . Mobile device

902. . . receiver

904. . . Demodulation transformer

906. . . processor

908. . . Memory

910. . . Power limit indicator

912. . . Back shift evaluator

914. . . Modulator

916. . . Transmitter

1000. . . system

1002. . . Base station

1004. . . Mobile device

1006. . . Receive antenna

1008. . . Transmission antenna

1010. . . receiver

1012. . . Demodulation transformer

1014. . . processor

1016. . . Memory

1018. . . Subband selector

1020. . . Subband scheduler

1022. . . Modulator

1024. . . Transmitter

1100. . . Wireless communication system

1110. . . Base station

1112. . . Data source

1114. . . Transmission (TX) data processor

1120. . . TX MIMO processor

1122a...1122t. . . transceiver

1124. . . antenna

1130. . . processor

1132. . . Memory

1136. . . Data source

1138. . . TX data processor

1140. . . Demodulation transformer

1142. . . RX data processor

1150. . . Mobile device

1152a...1152r. . . antenna

1154a...1154r. . . transceiver

1160. . . RX data processor

1170. . . processor

1172. . . Memory

1180. . . Modulator

1200. . . system

1202. . . Logical grouping

1204. . . Electrical component

1206. . . Electrical component

1208. . . Electrical component

1210. . . Memory

1300. . . system

1302. . . Logical grouping

1304. . . Electrical component

1306. . . Electrical component

1308. . . Memory

Figure 1 is a block diagram of a system that facilitates dynamic power amplifier post shifting.

2 is an illustration of a channel tree structure for supporting subband scheduling.

3 is an illustration of a wireless communication system in accordance with various aspects set forth herein.

4 is an illustration of an example wireless communication system that implements dynamic power amplifier post shifting based on subband scheduling.

5 is an illustration of a wireless communication system in accordance with one or more aspects set forth herein.

6 is an illustration of an example method that facilitates subband scheduling based on considerations of power limitations.

7 is an illustration of an example method that facilitates adjusting the back shift of a power amplifier based on subband scheduling.

8 is an illustration of an example method that facilitates signaling information via a reverse link in conjunction with obtaining a scheduled sub-band assignment for transmission.

9 is an illustration of an example mobile device that facilitates determining a power amplifier back-shift value.

10 is an illustration of an example system that facilitates generation of sub-band scheduling based on power limiting information.

11 is an illustration of an example wireless network environment that can be used in conjunction with the various systems and methods described herein.

Figure 12 is an illustration of an example system for generating sub-band schedules.

Figure 13 is an illustration of an example system that facilitates transmission of power header space information.

700. . . method

702. . . Reference number

704. . . Reference number

706. . . Reference number

Claims (14)

A method of mitigating nonlinear distortion in a spectral mask margin, comprising: receiving a first power limit information from a first mobile device; responding to indicating that the power amplifier has a finite power amplifier size at a sector or cell edge The first power limiting information of the quality of service (QoS) and scheduling the first mobile device on an internal sub-band of one of the configured spectrums; determining the first in the first motion device based on the scheduling Relocating a power amplifier of the mobile device; receiving a second power limit message from a second mobile device; and responding to the second power limit information indicating a larger power amplifier size The schedule is on the remainder of one of the configured spectrums. The method of claim 1, wherein the first power limit information comprises power amplifier header space information from the first mobile device, the power amplifier header spatial information including a periodic maximum received power measurement result for a broadband assignment . The method of claim 2, wherein the power amplifier header spatial information from the first mobile device further comprises the power amplifier of the first mobile device associated with the internal subband, an edge subband, or a single base node The static difference measurement result of the notified header space. The method of claim 3, further comprising adding the notified static difference measurement result to the periodic maximum received power measurement result And calculating a power amplifier header space measurement result of the first mobile device. A mobile device includes: a power limit indicator that transmits a power limit indication to a base station, the power limit indication including a power constraint of the mobile device; a power amplifier; and a back estimator that provides A post-shift value is applied to the power amplifier, the post-shift value being dependent on a spectral schedule assigned to the mobile device, wherein the post-shift value is dependent on a width of the one of the spectrum schedules assigned to the mobile device. The mobile device of claim 5, wherein the power limit indication comprises location information of the mobile device. The mobile device of claim 6, wherein the power limit indication comprises measured carrier interference at the mobile device. A method of mitigating distortion of a non-linear amplifier on a mobile device, the method comprising: transmitting a power limit indication to a base station, the power limit indication including a power constraint of the mobile device; the base station is based on the power limit indication Assigning a spectrum schedule to the mobile device; generating a post-shift value to one of the mobile device power amplifiers, the post-shift value being dependent on the spectrum schedule assigned to the mobile device, wherein the back shift value depends on One of the spectral schedules assigned to the mobile device. The method of claim 8, wherein the power limit indication includes the action setting Prepare location information. The method of claim 9, wherein the power limit indication comprises measured carrier interference at the mobile device. A device for mitigating distortion of a non-linear amplifier on a mobile device, the device comprising: means for transmitting a power limit indication to a base station, the power limit indication comprising a power constraint of the mobile device; a power limit indication to assign a spectrum schedule to a component of the mobile device; a means for generating a back-shift value to a power amplifier of the mobile device, the post-shift value being dependent on the spectrum rank assigned to the mobile device And wherein the back shift value is dependent on a width of the one of the spectrum schedules assigned to the mobile device. An article comprising a non-transitory computer readable medium embedded in a computer executable program, the computer executable program including instructions to cause a processor executing one of the computer executable programs to execute The program includes: transmitting a power limit indication to a base station, the power limit indication including a power constraint of the mobile device; generating a back shift value to a power amplifier of the mobile device, the backward shift value being determined by the base A station schedules a spectrum schedule assigned to the mobile device, wherein the back shift value is dependent on a width of the one of the spectrum schedules assigned to the mobile device. The article of claim 12, wherein the power limit indication comprises the action setting Prepare location information. The article of claim 13, wherein the power limit indication comprises measured carrier interference at the mobile device.