US20140247860A1 - Codebook and codebook search - Google Patents
Codebook and codebook search Download PDFInfo
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- US20140247860A1 US20140247860A1 US14/193,509 US201414193509A US2014247860A1 US 20140247860 A1 US20140247860 A1 US 20140247860A1 US 201414193509 A US201414193509 A US 201414193509A US 2014247860 A1 US2014247860 A1 US 2014247860A1
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Definitions
- Channel state information is used to provide information about a transmission channel between a transmitting device and a receiving device.
- the CSI is fed back from the receiving device to the transmitting device so that the transmitting device may adjust its transmissions to account for the conditions of the channel.
- a precoding matrix indicator (PMI) from a codebook may be feedback so that the transmitter may apply a selected precoding matrix to its transmission to adjust to the channel.
- PMI precoding matrix indicator
- codebooks may be reused to ensure compatibility with previous standards while modifying the codebooks for advanced transmission techniques.
- codeword searches may be optimized for the modified codebooks.
- FIG. 1 is a diagram of a wireless communication system capable of utilizing a codebook to feed back a precoding matrix indicator/channel state information in accordance with one or more embodiments;
- FIG. 2 is a conceptual diagram of a codebook having nested codewords and non-nested codewords in accordance with one or more embodiments
- FIG. 3 is a conceptual diagram of a codebook having at least some vectors optimized for cross-polarized antennas in accordance with one or more embodiments;
- FIG. 4 is a diagram of cross polarized antennas for which the codebook of FIG. 3 may be designed to optimize performance in accordance with one or more embodiments;
- FIG. 5 is a flow diagram of a method to perform a codeword search for a single user multiple-input, multiple output (SU-MIMO) system in accordance with one or more embodiments;
- FIG. 6 is a flow diagram of a method to perform a codeword search for a multi-user multiple-input, multiple output (MU-MIMO) system in accordance with one or more embodiments;
- FIG. 7 is a block diagram of an information handling system capable of utilizing a codebook and/or performing a codebook search in accordance with one or more embodiments.
- FIG. 8 is an isometric view of an information handling system of FIG. 6 that optionally may include a touch screen in accordance with one or more embodiments.
- Coupled may mean that two or more elements are in direct physical and/or electrical contact.
- coupled may also mean that two or more elements may not be in direct contact with each other, but yet may still cooperate and/or interact with each other.
- “coupled” may mean that two or more elements do not contact each other but are indirectly joined together via another element or intermediate elements.
- “On,” “overlying,” and “over” may be used to indicate that two or more elements are in direct physical contact with each other. However, “over” may also mean that two or more elements are not in direct contact with each other. For example, “over” may mean that one element is above another element but not contact each other and may have another element or elements in between the two elements.
- the term “and/or” may mean “and”, it may mean “or”, it may mean “exclusive-or”, it may mean “one”, it may mean “some, but not all”, it may mean “neither”, and/or it may mean “both”, although the scope of claimed subject matter is not limited in this respect.
- the terms “comprise” and “include,” along with their derivatives, may be used and are intended as synonyms for each other.
- wireless communication system 100 may comprise enhanced node B (eNB) 110 to communicate with user equipment (UE) 112 via channel 114 .
- eNB 110 may include one or more antennas 116 and UE 112 likewise may have one or more antennas 118 for example to implement multiple-input, multiple-output (MIMO) communications.
- MIMO multiple-input, multiple-output
- eNB 110 may communicate with UE 112 via single-user MIMO (SU-MIMO), and where there are more than one UEs 112 , eNB 110 may communicate with the UEs 112 via multi-user MIMO (MU-MIMO).
- SU-MIMO single-user MIMO
- MU-MIMO multi-user MIMO
- a single UE 112 will be discussed herein, although the concepts also may apply to multiple UEs 112 , and the scope of the claimed subject matter is not limited in this respect.
- eNB 110 may transmit training, reference, or pilot signals to UE 112 via channel 114 so that UE 112 may calculate a precoding matrix indicator (PMI), channel state information (CSI) and/or a rank index (RI) as feedback 120 to eNB 110 .
- PMI precoding matrix indicator
- CSI channel state information
- RI rank index
- rank-1 codeword (RANK-1) 122 and/or rank-2 codeword (RANK-2) 124 may be fed back to eNB 110 wherein the rank-1 codeword 122 and the rank-2 codeword 124 may be modified as discussed herein.
- eNB 110 may utilize a precoding matrix for downlink transmissions via channel 114 to one or more UEs 112 .
- An example codebook with modified Rank-2 codewords is shown in and described with respect to FIG. 2 , below.
- codebook 200 may be utilized by UE 112 of FIG. 1 to provide feedback 120 to eNB 110 to optimize downlink channel transmissions.
- Codebook 200 of FIG. 2 has been modified to relax the nesting structure utilized by prior codebooks.
- the 4Tx codebook of Release 8 of the 3GPP standard utilizes a nesting structure wherein if the codebook has a rank-1 codeword vector, v, which is a 4 ⁇ 1 vector, the codebook must have at least one rank-2 codeword which is a 4 ⁇ 2 matrix and which contains the same rank-1 codeword as one of its columns.
- v rank-1 codeword vector
- rank-2 codeword which is a 4 ⁇ 2 matrix and which contains the same rank-1 codeword as one of its columns.
- rank-3 and rank 4-codebooks and so on.
- One of the main reason for using a nesting structure is reduced codeword search complexity.
- the search results of a lower rank codebook can be reused. From a performance point of view, however, the nesting property of the codebook may degrade the performance for reducing search complexity.
- codebook 200 may be designed to optimize performance in terms of throughput.
- the nesting structure is implemented by selecting the columns after Householder reflection.
- the higher rank codeword which has more columns than the lower rank one, always uses the lower rank codeword as the first columns and then selects the remaining columns from the square matrix generated by Householder reflection with the first column of the lower rank codeword.
- the design of codebook 200 of FIG. 2 optimizes throughput optimized codebook by relaxing this nesting property.
- codebook 200 may include rank-1 codewords and rank-2 codewords 212 .
- a rank-2 codeword may have columns that are different from any rank-1 codeword.
- the rank-2 codeword may include any two columns from the Householder matrix instead of always picking the first column of the Householder matrix as one of rank-2 codeword column.
- the rank-2 codewords 212 of codebook 200 may include some nested codewords 214 that exhibit the nesting property, and some non-nested codewords 216 that do not exhibit the nesting property.
- the rank-1 vector may be the same as the rank-1 vector as described in Release 8 of the 3GPP standard.
- rank 2 As a modified rank-2 codebook 200 , column selection of rank 2 may be optimized for throughput performance, for example as determined via computer simulation. From an examination of the example codebook of Table 1, it can be seen that some codewords still maintain the nesting property whereas others do not.
- the rank-1 vectors reuse all of the 32 4Tx Discrete Fourier Transform (DFT) vectors as defined in Release 10 of the 3GPP standard for an 8Tx codebook.
- DFT vectors may be used for both a uniform linear array (ULA) of antennas and cross polarized antennas, but when DFT vectors are used for cross polarized antennas, there is a limitation that the phase difference between the two antennas having the same position but different polarization directions has to be twice as much as the phase difference between two antennas of the same polarization direction.
- a modified rank-1 codebook for addressing such cross polarization is shown in and described with respect to FIG. 3 , below.
- Codebook 200 of FIG. 3 may be substantially similar to the codebook 200 of FIG. 2 optionally having at least some rank-2 codewords that are non-nested, with the modification that at least some of the rank-1 codewords may include one or more Discrete Fourier Transform (DFT) vectors 218 and at last some of the rank-1 codewords may include one or more vector optimized for cross polarization (X-POL) 220 if the antennas are cross polarized.
- DFT Discrete Fourier Transform
- X-POL cross polarization
- An example of cross polarization of antennas is shown in and described with respect to FIG. 4 , below.
- one modification of the rank-1 codewords 210 may be where half of the DFT vectors 218 may be utilized, and the remaining half of the DFT vectors may be replaced with non-DFT vectors 220 specifically optimized for cross polarized antennas.
- An example of such a codebook using DFT vectors 218 and non-DFT vectors 220 is shown in Table 2, below.
- FIG. 4 a diagram of cross polarized antennas for which the codebook of FIG. 3 may be designed to optimize performance in accordance with one or more embodiments will be discussed.
- An example cross polarized (X-Pol) antenna array 400 is shown in FIG. 4 having two pairs of antennas, antenna 410 , antenna 412 , antenna 414 and antenna 416 , with the same spacing but the two pairs have different antenna polarizations.
- the different polarizations make the phase difference between the corresponding elements of the two pairs randomly distributed between 0 and 360 degrees wherein ⁇ , ⁇ ⁇ [0, 2 ⁇ ].
- codebook 200 of FIG. 3 may be optimized for cross polarization of the antennas while maintaining the backward compatibility as much as possible.
- the DFT vector has three properties. The magnitude of each entry is the same, the phase difference between any two adjacent entries remains the same for each vector; and the phase of each entry is picked from a finite alphabet:
- the constant magnitude is for lowering the peak to average power ratio of the power amplifier.
- the constant phase difference is suitable for uniform linear arrays, which have evenly spaced antenna elements. However, the constant phase difference may not fit the cross polarized antenna array 400 .
- the codebook design may be optimized for cross polarized antenna array 400 as a likely deployment scenario. Taking into account the phase structure of cross polarized antenna array 400 , we have the codebook structure may be created as discussed, below, while maintaining the backward compatibility as much as possible for the 3GPP standard in addition to addressing performance for cross polarized antenna array 400 . Examples of suitable codewords for such a codebook 200 having at least some Rank-1 DFT vectors 218 and at least some Rank-1 vectors optimized for cross polarization 220 are shown by the W n ⁇ k ⁇ terms in Table 1 and/or Table 2, above.
- one example process for design of such a codebook may be as follows:
- the constant magnitude (or constant modulus) property of the legacy codebook is kept for backward compatibility and low PAPR.
- the 4 ⁇ 1 codeword is of a structure (e j0 e j ⁇ e j ⁇ e j ⁇ + ⁇ ), where ⁇ is for quantizing the phase difference between the two co-pol antennas and ⁇ is for quantizing the phase difference between the two pairs of the cross polarized antennas 400 .
- the ⁇ and ⁇ are selected from a finite alphabet, for example,
- This codeword structure may be suitable for a uniform linear array (ULA) of antennas, which also may be a useful deployment scenario in one or more embodiments.
- ULA uniform linear array
- one more structure may be needed, for example (e j0 e j ⁇ e j2 ⁇ +n ⁇ e j3 ⁇ n+ ⁇ ), where ⁇ e.g.,
- the stepping through of the ⁇ and ⁇ over [0, 360 degrees] may be synchronized in constructing the quantization codewords such that codewords of (e j0 e j ⁇ e j2 ⁇ e j3 ⁇ ) structure may be generated without scarifying the quantization performance of cross polarized antennas 400 and help the quantization performance of a uniform linear array (ULA) of antennas antenna as an additional benefit.
- UPA uniform linear array
- FIG. 5 a flow diagram of a method to perform a codeword search for a single user multiple-input, multiple-output (SU-MIMO) system in accordance with one or more embodiments will be discussed.
- FIG. 5 illustrates one particular embodiment of method 500
- alternative embodiments of method 500 may be realized for example where method 500 includes more or fewer blocks than shown, and/or in various other orders, and the scope of the claimed subject matter is not limited in these respects.
- UE 112 may optimize a codeword search method if UE 112 has knowledge of the scheduling preference of eNB 110 .
- eNB 110 needs a minimum of one bit for broadcasting a signaling to indicate its scheduling preference.
- CSI channel state information
- 3GPP Third Generation Partnership Project
- eNB 110 may configure one CSI process for single user multiple-input, multiple-output (SU-MIMO) CSI and the other CSI process for multi-user multiple-input, multiple-output (MU-MIMO) CSI.
- SU-MIMO single user multiple-input, multiple-output
- MU-MIMO multi-user multiple-input, multiple-output
- a codeword search process may be further optimized by leveraging both the rank-1 and rank-2 codebooks.
- UE 112 may perform a CSI search at block 510 to find a best precoding matrix indicator (PMI) for each of rank-1 and rank-2.
- PMI precoding matrix indicator
- i r arg ⁇ ⁇ max ⁇ ( capacity ⁇ ( v i , H , C ) ) v i ⁇ C r
- UE 112 may select the best rank, rank-1 or rank-2, using the following equation:
- r best arg ⁇ ⁇ max ⁇ ( capacity ⁇ ( v i r , H , C ) ) 1 ⁇ r ⁇ r max
- UE 112 reports the better or best rank and the best PMI/CQI for the better or best rank accordingly.
- the capacity for SU-MIMO may be maximized or nearly maximized, although the scope of the claimed subject matter is not limited in this respect.
- FIG. 6 a flow diagram of a method to perform a codeword search for a multi-user multiple-input, multiple-output (MU-MIMO) system in accordance with one or more embodiments will be discussed.
- FIG. 6 illustrates one particular embodiment of method 600
- alternative embodiments of method 600 may be realized for example where method 600 includes more or fewer blocks than shown, and/or in various other orders, and the scope of the claimed subject matter is not limited in these respects.
- UE 112 may perform a CSI search to find a better or best rank for rank-1 and rank-2 using each column of each codeword as a rank-1 precoder in the following equation:
- C r is the codebook of rank r
- R is the channel covariance matrix of one subcarrier or one band
- i r is the best PMI for rank r.
- UE 112 then reports the better or best rank and the best PMI/CQI for the better or best rank accordingly.
- the algorithm of method 600 may minimize the quantization error of the principal Eigen beam. It should be noted that it also may be possible to apply the better or best rank search equation of block 510 of FIG. 5 to search for the best rank-1 vector for MU-MIMO instead of using the equations of block 610 and 612 of method 600 , although performance may be suboptimal. Since the nesting property of the codebooks of Release 8 and Release 10 of the Third Generation Partnership Project (3GPP) standard reduces the codeword and/or rank search complexity with a tradeoff of performance, the nesting property optionally may be removed.
- 3GPP Third Generation Partnership Project
- each rank-2 codeword does not need to be the same as its corresponding rank-1 codeword, there are more rank-1 vectors available in rank-1 and rank-2 codebooks overall than before so that the quantization error of rank-1 input may be reduced. Therefore, in order to maximize the channel capacity using the MU-MIMO optimized search method 600 of FIG. 6 , the nesting constraint optionally need not be imposed on the newly added 48 codewords in Table 1 and/or Table 2 as discussed, above, although the scope of the claimed subject matter is not limited in this respect.
- Information handling system 700 of FIG. 7 may tangibly embody any one or more of the elements described herein, above, including for example eNB 110 and/or UE 112 , with greater or fewer components depending on the hardware specifications of the particular device.
- information handling system 700 represents one example of several types of computing platforms, information handling system 700 may include more or fewer elements and/or different arrangements of elements than shown in FIG. 7 , and the scope of the claimed subject matter is not limited in these respects.
- information handling system 700 may include an application processor 710 and a baseband processor 712 .
- Application processor 710 may be utilized as a general-purpose processor to run applications and the various subsystems for information handling system 700 .
- Application processor 710 may include a single core or alternatively may include multiple processing cores wherein one or more of the cores may comprise a digital signal processor or digital signal processing (DSP) core.
- DSP digital signal processing
- application processor 710 may include a graphics processor or coprocessor disposed on the same chip, or alternatively a graphics processor coupled to application processor 710 may comprise a separate, discrete graphics chip.
- Application processor 710 may include on board memory such as cache memory, and further may be coupled to external memory devices such as synchronous dynamic random access memory (SDRAM) 714 for storing and/or executing applications during operation, and NAND flash 716 for storing applications and/or data even when information handling system 700 is powered off.
- SDRAM synchronous dynamic random access memory
- NAND flash 716 for storing applications and/or data even when information handling system 700 is powered off.
- instructions to operate or configure the information handling system 700 and/or any of its components or subsystems to operate in a manner as described herein may be stored on a article of manufacture comprising a non-transitory storage medium.
- the storage medium may comprise any of the memory devices shown in and described herein, although the scope of the claimed subject matter is not limited in this respect.
- Baseband processor 712 may control the broadband radio functions for information handling system 700 .
- Baseband processor 712 may store code for controlling such broadband radio functions in a NOR flash 718 .
- Baseband processor 712 controls a wireless wide area network (WWAN) transceiver 720 which is used for modulating and/or demodulating broadband network signals, for example for communicating via a 3GPP LTE or LTE-Advanced network or the like.
- WWAN wireless wide area network
- WWAN transceiver 720 may operate according to any one or more of the following radio communication technologies and/or standards including but not limited to: a Global System for Mobile Communications (GSM) radio communication technology, a General Packet Radio Service (GPRS) radio communication technology, an Enhanced Data Rates for GSM Evolution (EDGE) radio communication technology, and/or a Third Generation Partnership Project (3GPP) radio communication technology, for example Universal Mobile Telecommunications System (UMTS), Freedom of Multimedia Access (FOMA), 3GPP Long Term Evolution (LTE), 3GPP Long Term Evolution Advanced (LTE Advanced), Code division multiple access 2000 (CDMA2000), Cellular Digital Packet Data (CDPD), Mobitex, Third Generation (3G), Circuit Switched Data (CSD), High-Speed Circuit-Switched Data (HSCSD), Universal Mobile Telecommunications System (Third Generation) (UMTS (3G)), Wideband Code Division Multiple Access (Universal Mobile Telecommunications System) (W-CDMA (UMTS)), High Speed Packet Access (HSPA), High-
- Pre-4G UMTS Terrestrial Radio Access
- UTRA Evolved UMTS Terrestrial Radio Access
- LTE Advanced (4G) Long Term Evolution Advanced (4G)
- cdmaOne 2G
- CDMA2000 (3G) Code division multiple access 2000
- AMPS Advanced Mobile Phone System
- TACS/ETACS Total Access Communication System
- D-AMPS Digital AMPS
- PTT Push-to-talk
- MTS Mobile Telephone System
- IMTS Improved Mobile Telephone System
- AMTS Advanced Mobile Telephone System
- OLT Neorwegian for Offentlig Landmobil kgi, Public Land Mobile Telephony
- MTD Mobile telephony
- ARP Public Automated Land Mobile
- the WWAN transceiver 720 couples to one or more power amps 722 respectively coupled to one or more antennas 724 for sending and receiving radio-frequency signals via the WWAN broadband network.
- the baseband processor 712 also may control a wireless local area network (WLAN) transceiver 726 coupled to one or more suitable antennas 728 and which may be capable of communicating via a Wi-Fi, Bluetooth®, and/or an amplitude modulation (AM) or frequency modulation (FM) radio standard including an IEEE 802.11a/b/g/n standard or the like.
- WLAN wireless local area network
- AM amplitude modulation
- FM frequency modulation
- any one or more of SDRAM 814 , NAND flash 716 and/or NOR flash 718 may comprise other types of memory technology such as magnetic memory, chalcogenide memory, phase change memory, or ovonic memory, and the scope of the claimed subject matter is not limited in this respect.
- application processor 710 may drive a display 730 for displaying various information or data, and may further receive touch input from a user via a touch screen 732 for example via a finger or a stylus.
- An ambient light sensor 734 may be utilized to detect an amount of ambient light in which information handling system 700 is operating, for example to control a brightness or contrast value for display 730 as a function of the intensity of ambient light detected by ambient light sensor 734 .
- One or more cameras 736 may be utilized to capture images that are processed by application processor 710 and/or at least temporarily stored in NAND flash 716 .
- application processor may couple to a gyroscope 738 , accelerometer 740 , magnetometer 742 , audio coder/decoder (CODEC) 744 , and/or global positioning system (GPS) controller 746 coupled to an appropriate GPS antenna 748 , for detection of various environmental properties including location, movement, and/or orientation of information handling system 700 .
- controller 746 may comprise a Global Navigation Satellite System (GNSS) controller.
- Audio CODEC 744 may be coupled to one or more audio ports 750 to provide microphone input and speaker outputs either via internal devices and/or via external devices coupled to information handling system via the audio ports 750 , for example via a headphone and microphone jack.
- application processor 710 may couple to one or more input/output (I/O) transceivers 752 to couple to one or more I/O ports 754 such as a universal serial bus (USB) port, a high-definition multimedia interface (HDMI) port, a serial port, and so on.
- I/O transceivers 752 may couple to one or more memory slots 756 for optional removable memory such as secure digital (SD) card or a subscriber identity module (SIM) card, although the scope of the claimed subject matter is not limited in these respects.
- SD secure digital
- SIM subscriber identity module
- FIG. 8 shows an example implementation of information handling system 700 of FIG. 7 tangibly embodied as a cellular telephone, smartphone, or tablet type device or the like.
- the information handling system 700 may comprise a housing 810 having a display 830 which may include a touch screen 832 for receiving tactile input control and commands via a finger 816 of a user and/or a via stylus 818 to control one or more application processors 710 .
- the housing 810 may house one or more components of information handling system 700 , for example one or more application processors 710 , one or more of SDRAM 714 , NAND flash 716 , NOR flash 718 , baseband processor 712 , and/or WWAN transceiver 720 .
- the information handling system 700 further may optionally include a physical actuator area 820 which may comprise a keyboard or buttons for controlling information handling system via one or more buttons or switches.
- the information handling system 700 may also include a memory port or slot 756 for receiving non-volatile memory such as flash memory, for example in the form of a secure digital (SD) card or a subscriber identity module (SIM) card.
- SD secure digital
- SIM subscriber identity module
- the information handling system 700 may further include one or more speakers and/or microphones 824 and a connection port 754 for connecting the information handling system 700 to another electronic device, dock, display, battery charger, and so on.
- information handling system 700 may include a headphone or speaker jack 828 and one or more cameras 736 on one or more sides of the housing 810 . It should be noted that the information handling system 700 of FIG. 8 may include more or fewer elements than shown, in various arrangements, and the scope of the claimed subject matter is not limited in this respect.
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Abstract
Briefly, in accordance with one or more embodiments, a codebook used to provide a precoding matrix indicator and/or channel state information comprises one or more rank-1 codewords and at least one or more rank-2 codewords exhibiting a nesting property with the rank-1 codewords, and one or more rank-2 codewords not exhibiting a nesting property with the rank-1 codewords. Further, the rank-1 codewords may include at least some Discrete Fourier Transform (DFT) vectors, and at least some vectors that are optimized for a cross polarize array of antennas if the array of antennas is cross polarized. The codebook may be utilized for single-user multiple-input, multiple-output (SU-MIMO) or multi-user multiple-input, multiple-output (MU-MIMO).
Description
- The present application claims the benefit of U.S. Provisional Application No. 61/771,698 (Attorney Docket No. P54838Z) filed Mar. 1, 2013. Said Application No. 61/771,698 is hereby incorporated herein in its entirety.
- Channel state information (CSI) is used to provide information about a transmission channel between a transmitting device and a receiving device. The CSI is fed back from the receiving device to the transmitting device so that the transmitting device may adjust its transmissions to account for the conditions of the channel. As part of this feedback, a precoding matrix indicator (PMI) from a codebook may be feedback so that the transmitter may apply a selected precoding matrix to its transmission to adjust to the channel. In general, as codebooks are enhanced for more advanced transmission techniques, the codebooks also may be reused to ensure compatibility with previous standards while modifying the codebooks for advanced transmission techniques. Furthermore, codeword searches may be optimized for the modified codebooks.
- Claimed subject matter is particularly pointed out and distinctly claimed in the concluding portion of the specification. However, such subject matter may be understood by reference to the following detailed description when read with the accompanying drawings in which:
-
FIG. 1 is a diagram of a wireless communication system capable of utilizing a codebook to feed back a precoding matrix indicator/channel state information in accordance with one or more embodiments; -
FIG. 2 is a conceptual diagram of a codebook having nested codewords and non-nested codewords in accordance with one or more embodiments; -
FIG. 3 is a conceptual diagram of a codebook having at least some vectors optimized for cross-polarized antennas in accordance with one or more embodiments; -
FIG. 4 is a diagram of cross polarized antennas for which the codebook ofFIG. 3 may be designed to optimize performance in accordance with one or more embodiments; -
FIG. 5 is a flow diagram of a method to perform a codeword search for a single user multiple-input, multiple output (SU-MIMO) system in accordance with one or more embodiments; -
FIG. 6 is a flow diagram of a method to perform a codeword search for a multi-user multiple-input, multiple output (MU-MIMO) system in accordance with one or more embodiments; -
FIG. 7 is a block diagram of an information handling system capable of utilizing a codebook and/or performing a codebook search in accordance with one or more embodiments; and -
FIG. 8 is an isometric view of an information handling system ofFIG. 6 that optionally may include a touch screen in accordance with one or more embodiments. - It will be appreciated that for simplicity and/or clarity of illustration, elements illustrated in the figures have not necessarily been drawn to scale. For example, the dimensions of some of the elements may be exaggerated relative to other elements for clarity. Further, if considered appropriate, reference numerals have been repeated among the figures to indicate corresponding and/or analogous elements.
- In the following detailed description, numerous specific details are set forth to provide a thorough understanding of claimed subject matter. However, it will be understood by those skilled in the art that claimed subject matter may be practiced without these specific details. In other instances, well-known methods, procedures, components and/or circuits have not been described in detail.
- In the following description and/or claims, the terms coupled and/or connected, along with their derivatives, may be used. In particular embodiments, connected may be used to indicate that two or more elements are in direct physical and/or electrical contact with each other. Coupled may mean that two or more elements are in direct physical and/or electrical contact. However, coupled may also mean that two or more elements may not be in direct contact with each other, but yet may still cooperate and/or interact with each other. For example, “coupled” may mean that two or more elements do not contact each other but are indirectly joined together via another element or intermediate elements. Finally, the terms “on,” “overlying,” and “over” may be used in the following description and claims. “On,” “overlying,” and “over” may be used to indicate that two or more elements are in direct physical contact with each other. However, “over” may also mean that two or more elements are not in direct contact with each other. For example, “over” may mean that one element is above another element but not contact each other and may have another element or elements in between the two elements. Furthermore, the term “and/or” may mean “and”, it may mean “or”, it may mean “exclusive-or”, it may mean “one”, it may mean “some, but not all”, it may mean “neither”, and/or it may mean “both”, although the scope of claimed subject matter is not limited in this respect. In the following description and/or claims, the terms “comprise” and “include,” along with their derivatives, may be used and are intended as synonyms for each other.
- Referring now to
FIG. 1 , a diagram of a wireless communication system capable of utilizing a codebook to feed back a precoding matrix indicator/channel state information in accordance with one or more embodiments will be discussed. As shown inFIG. 1 ,wireless communication system 100 may comprise enhanced node B (eNB) 110 to communicate with user equipment (UE) 112 viachannel 114. In some embodiments, eNB 110 may include one ormore antennas 116 and UE 112 likewise may have one ormore antennas 118 for example to implement multiple-input, multiple-output (MIMO) communications. Where there is a single UE 112, eNB 110 may communicate with UE 112 via single-user MIMO (SU-MIMO), and where there are more than one UEs 112, eNB 110 may communicate with the UEs 112 via multi-user MIMO (MU-MIMO). For purposes of example, a single UE 112 will be discussed herein, although the concepts also may apply tomultiple UEs 112, and the scope of the claimed subject matter is not limited in this respect. In order to optimize throughput between the eNB 110 and UE 112, eNB 110 may transmit training, reference, or pilot signals to UE 112 viachannel 114 so that UE 112 may calculate a precoding matrix indicator (PMI), channel state information (CSI) and/or a rank index (RI) asfeedback 120 to eNB 110. As part ofsuch feedback 120, rank-1 codeword (RANK-1) 122 and/or rank-2 codeword (RANK-2) 124, as selected from a codebook and as calculated by UE 112 as optimizing downlink transmission performance viachannel 114, may be fed back to eNB 110 wherein the rank-1codeword 122 and the rank-2codeword 124 may be modified as discussed herein. Based at least in part onfeedback 120 received from UE 112, eNB 110 may utilize a precoding matrix for downlink transmissions viachannel 114 to one or more UEs 112. An example codebook with modified Rank-2 codewords is shown in and described with respect toFIG. 2 , below. - Referring now to
FIG. 2 , a conceptual diagram of a codebook having nested codewords and non-nested codewords in accordance with one or more embodiments will be discussed. In one or more embodiments,codebook 200 may be utilized by UE 112 ofFIG. 1 to providefeedback 120 to eNB 110 to optimize downlink channel transmissions. Codebook 200 ofFIG. 2 has been modified to relax the nesting structure utilized by prior codebooks. For example, under the Third Generation Partnership Project (3GPP) Standard, the 4Tx codebook of Release 8 of the 3GPP standard utilizes a nesting structure wherein if the codebook has a rank-1 codeword vector, v, which is a 4×1 vector, the codebook must have at least one rank-2 codeword which is a 4×2 matrix and which contains the same rank-1 codeword as one of its columns. The same rule also applies to rank-3 and rank 4-codebooks, and so on. One of the main reason for using a nesting structure is reduced codeword search complexity. When UE 112 is searching for a higher rank codebook in order to perform rank adaptation, the search results of a lower rank codebook can be reused. From a performance point of view, however, the nesting property of the codebook may degrade the performance for reducing search complexity. - In accordance with one or more embodiments,
codebook 200 may be designed to optimize performance in terms of throughput. In the 4Tx codebook of Release 8 of the 3GPP standard, the nesting structure is implemented by selecting the columns after Householder reflection. The higher rank codeword, which has more columns than the lower rank one, always uses the lower rank codeword as the first columns and then selects the remaining columns from the square matrix generated by Householder reflection with the first column of the lower rank codeword. In contrast, the design ofcodebook 200 ofFIG. 2 optimizes throughput optimized codebook by relaxing this nesting property. As shown inFIG. 2 ,codebook 200 may include rank-1 codewords and rank-2codewords 212. In the rank-2codewords 212, a rank-2 codeword may have columns that are different from any rank-1 codeword. For example, the rank-2 codeword may include any two columns from the Householder matrix instead of always picking the first column of the Householder matrix as one of rank-2 codeword column. As a result, the rank-2codewords 212 ofcodebook 200 may include somenested codewords 214 that exhibit the nesting property, and some non-nestedcodewords 216 that do not exhibit the nesting property. Table 1, below, illustrates an example of the 6-bit codebook forrank 1 andrank 2. The rank-1 vector may be the same as the rank-1 vector as described in Release 8 of the 3GPP standard. As a modified rank-2codebook 200, column selection ofrank 2 may be optimized for throughput performance, for example as determined via computer simulation. From an examination of the example codebook of Table 1, it can be seen that some codewords still maintain the nesting property whereas others do not. -
TABLE 1 6-bit codebook of 4Tx antennas rank-1 and rank-2 Codebook Number of layers υ index un 1 2 0 u0 = [1 −1 −1 −1]T W0 (1) W0 (14)/{square root over (2)} 1 u1 = [1 −j 1 j]T W1 (1) W1 (12)/{square root over (2)} 2 u2 = [1 1 −1 1]T W2 (1) W2 (12)/{square root over (2)} 3 u3 = [1 j 1 −j]T W3 (1) W3 (12)/{square root over (2)} 4 u4 = [1 (−1 − j)/{square root over (2)} −j (1 − j)/{square root over (2)}]T W4 (1) W4 (14)/{square root over (2)} 5 u5 = [1 (1 − j)/{square root over (2)} j (−1 − j)/{square root over (2)}]T W5 (1) W5 (14)/{square root over (2)} 6 u6 = [1 (1 + j)/{square root over (2)} −j (−1 + j)/{square root over (2)}]T W6 (1) W6 (13)/{square root over (2)} 7 u7 = [1 (−1 + j)/{square root over (2)} j (1 + j)/{square root over (2)}]T W7 (1) W7 (13)/{square root over (2)} 8 u8 = [1 −1 1 1]T W8 (1) W8 (12)/{square root over (2)} 9 u9 = [1 −j −1 −j]T W9 (1) W9 (14)/{square root over (2)} 10 u10 = [1 1 1 −1]T W10 (1) W10 (13)/{square root over (2)} 11 u11 = [1 j −1 j]T W11 (1) W11 (13)/{square root over (2)} 12 u12 = [1 −1 −1 1]T W12 (1) W12 (12)/{square root over (2)} 13 u13 = [1 −1 1 −1]T W13 (1) W13 (13)/{square root over (2)} 14 u14 = [1 1 −1 −1]T W14 (1) W14 (13)/{square root over (2)} 15 u15 = [1 1 1 1]T W15 (1) W15 (12)/{square root over (2)} 16 u16 = [1 −ej2π2/32 −ej4π2/32 −ej6π2/32]T W16 (1) W16 (23)/{square root over (2)} 17 u17 = [1 −ej2π10/32 −ej4π10/32 −ej6π10/32]T W17 (1) W17 (34)/{square root over (2)} 18 u18 = [1 −ej2π18/32 −ej4π18/32 −ej6π18/32]T W18 (1) W18 (13)/{square root over (2)} 19 u19 = [1 −ej2π26/32 −ej4π26/32 −ej6π26/32]T W19 (1) W19 (34)/{square root over (2)} 20 u20 = [1 −ej2π6/32 −ej4π6/32 −ej6π6/32]T W20 (1) W20 (13)/{square root over (2)} 21 u21 = [1 −ej2π14/32 −ej4π14/32 −ej6π14/32]T W21 (1) W21 (24)/{square root over (2)} 22 u22 = [1 −ej2π22/32 −ej4π22/32 −ej6π22/32]T W22 (1) W22 (12)/{square root over (2)} 23 u23 = [1 −ej2π30/32 −ej4π30/32 −ej6π30/32]T W23 (1) W23 (14)/{square root over (2)} 24 u24 = [1 −1 −j −j]T W24 (1) W24 (23)/{square root over (2)} 25 u25 = [1 −j j −1]T W25 (1) W25 (12)/{square root over (2)} 26 u26 = [1 1 −j j]T W26 (1) W26 (34)/{square root over (2)} 27 u27 = [1 j j 1]T W27 (1) W27 (13)/{square root over (2)} 28 u28 = [1 −1 j j]T W28 (1) W28 (12)/{square root over (2)} 29 u29 = [1 −j −j 1]T W29 (1) W29 (13)/{square root over (2)} 30 u30 = [1 1 j −j]T W30 (1) W30 (12)/{square root over (2)} 31 u31 = [1 j −j −1]T W31 (1) W31 (14)/{square root over (2)} 32 u32 = [1 −ej2π/32 −ej4π/32 −ej6π/32]T W32 (1) W32 (12)/{square root over (2)} 33 u33 = [1 −ej2π9/32 −ej4π9/32 −ej6π9/32]T W33 (1) W33 (34)/{square root over (2)} 34 u34 = [1 −ej2π17/32 −ej4π17/32 −ej6π17/32]T W34 (1) W34 (14)/{square root over (2)} 35 u35 = [1 −ej2π25/32 −ej4π25/32 −ej6π25/32]T W35 (1) W35 (13)/{square root over (2)} 36 u36 = [1 −ej2π5/32 −ej4π5/32 −ej6π5/32]T W36 (1) W36 (12)/{square root over (2)} 37 u37 = [1 −ej2π13/32 −ej4π13/32 −ej6π13/32]T W37 (1) W37 (34)/{square root over (2)} 38 u38 = [1 −ej2π21/32 −ej4π21/32 −ej6π21/32]T W38 (1) W38 (34)/{square root over (2)} 39 u39 = [1 −ej2π29/32 −ej4π28/32 −ej6π29/32]T W39 (1) W39 (14)/{square root over (2)} 40 u40 = [1 −ej2π3/32 −ej4π3/32 −ej6π3/32]T W40 (1) W40 (13)/{square root over (2)} 41 u41 = [1 −ej2π11/32 −ej4π11/32 −ej6π11/32]T W41 (1) W41 (23)/{square root over (2)} 42 u42 = [1 −ej2π19/32 −ej4π19/32 −ej6π19/32]T W42 (1) W42 (24)/{square root over (2)} 43 u43 = [1 −ej2π27/32 −ej4π27/32 −ej6π27/32]T W43 (1) W43 (24)/{square root over (2)} 44 u44 = [1 −ej2π7/32 −ej4π7/32 −ej6π7/32]T W44 (1) W44 (12)/{square root over (2)} 45 u45 = [1 −ej2π15/32 −ej4π15/32 −ej6π15/32]T W45 (1) W45 (13)/{square root over (2)} 46 u46 = [1 −ej2π23/32 −ej4π23/32 −ej6π23/32]T W46 (1) W46 (12)/{square root over (2)} 47 u47 = [1 −ej2π31/32 −ej4π31/32 −ej6π31/32]T W47 (1) W47 (12)/{square root over (2)} 48 u48 = [1 (−1 − j)/{square root over (2)} j (−1 + j)/{square root over (2)}]T W48 (1) W48 (34)/{square root over (2)} 49 u49 = [1 (1 − j)/{square root over (2)} −j (1 + j)/{square root over (2)}]T W49 (1) W49 (13)/{square root over (2)} 50 u50 = [1 (1 + j)/{square root over (2)} j (1 − j)/{square root over (2)}]T W50 (1) W50 (23)/{square root over (2)} 51 u51 = [1 (−1 + j)/{square root over (2)} −j (−1 − j)/{square root over (2)}]T W51 (1) W51 (12)/{square root over (2)} 52 u52 = [1 (−1 − j)/{square root over (2)} −1 (−1 − j)/{square root over (2)}]T W52 (1) W52 (12)/{square root over (2)} 53 u53 = [1 (−1 − j)/{square root over (2)} 1 (−1 + j)/{square root over (2)}]T W53 (1) W53 (13)/{square root over (2)} 54 u54 = [1 (1 + j)/{square root over (2)} −1 (1 + j)/{square root over (2)}]T W54 (1) W54 (12)/{square root over (2)} 55 u55 = [1 (−1 + j)/{square root over (2)} 1 (1 − j)/{square root over (2)}]T W55 (1) W55 (14)/{square root over (2)} 56 u56 = [1 (−1 − j)/{square root over (2)} 1 (1 + j)/{square root over (2)}]T W56 (1) W56 (23)/{square root over (2)} 57 u57 = [1 (−1 − j)/{square root over (2)} −1 (1 − j)/{square root over (2)}]T W57 (1) W57 (23)/{square root over (2)} 58 u58 = [1 (1 + j)/{square root over (2)} 1 (−1 − j)/{square root over (2)}]T W58 (1) W58 (23)/{square root over (2)} 59 u59 = [1 (−1 + j)/{square root over (2)} −1 (−1 + j)/{square root over (2)}]T W59 (1) W59 (14)/{square root over (2)} 60 u60 = [2 0 0 0]T W60 (1) W60 (12)/{square root over (2)} 61 u61 = [0 2 0 0]T W61 (2) W61 (12)/{square root over (2)} 62 u62 = [0 0 2 0]T W62 (3) W62 (13)/{square root over (2)} 63 u63 = [0 0 0 2]T W63 (4) W63 (23)/{square root over (2)} - It should be noted that in the above example codebook of Table 1, the rank-1 vectors reuse all of the 32 4Tx Discrete Fourier Transform (DFT) vectors as defined in Release 10 of the 3GPP standard for an 8Tx codebook. It should be noted that DFT vectors may be used for both a uniform linear array (ULA) of antennas and cross polarized antennas, but when DFT vectors are used for cross polarized antennas, there is a limitation that the phase difference between the two antennas having the same position but different polarization directions has to be twice as much as the phase difference between two antennas of the same polarization direction. A modified rank-1 codebook for addressing such cross polarization is shown in and described with respect to
FIG. 3 , below. - Referring now to
FIG. 3 , a conceptual diagram of a codebook having at least some vectors optimized for cross-polarized antennas in accordance with one or more embodiments will be discussed.Codebook 200 ofFIG. 3 may be substantially similar to thecodebook 200 ofFIG. 2 optionally having at least some rank-2 codewords that are non-nested, with the modification that at least some of the rank-1 codewords may include one or more Discrete Fourier Transform (DFT)vectors 218 and at last some of the rank-1 codewords may include one or more vector optimized for cross polarization (X-POL) 220 if the antennas are cross polarized. An example of cross polarization of antennas is shown in and described with respect toFIG. 4 , below. In one example embodiment, one modification of the rank-1codewords 210 may be where half of theDFT vectors 218 may be utilized, and the remaining half of the DFT vectors may be replaced withnon-DFT vectors 220 specifically optimized for cross polarized antennas. An example of such a codebook usingDFT vectors 218 andnon-DFT vectors 220 is shown in Table 2, below. -
TABLE 2 6-bit codebook of 4Tx antennas Rank-1 and Rank-2 Codebook Number of layers υ index us 1 2 0 u0 = [1 −1 −1 −1]T W0 (1) W0 (14)/{square root over (2)} 1 u1 = [1 −j 1 j]T W1 (1) W1 (12)/{square root over (2)} 2 u2 = [1 1 −1 1]T W2 (1) W2 (12)/{square root over (2)} 3 u3 = [1 j 1 −j]T W3 (1) W3 (12)/{square root over (2)} 4 u4 = [1 (−1 − j)/{square root over (2)} −j (1 − j)/{square root over (2)}]T W4 (1) W4 (14)/{square root over (2)} 5 u5 = [1 (1 − j)/{square root over (2)} j (−1 − j)/{square root over (2)}]T W5 (1) W5 (14)/{square root over (2)} 6 u6 = [1 (1 + j)/{square root over (2)} −j (−1 + j)/{square root over (2)}]T W6 (1) W6 (13)/{square root over (2)} 7 u7 = [1 (−1 + j)/{square root over (2)} j (1 + j)/{square root over (2)}]T W7 (1) W7 (13)/{square root over (2)} 8 u8 = [1 −1 1 1]T W8 (1) W8 (12)/{square root over (2)} 9 u9 = [1 −j −1 −j]T W9 (1) W9 (14)/{square root over (2)} 10 u10 = [1 1 1 −1]T W10 (1) W10 (13)/{square root over (2)} 11 u11 = [1 j −1 j]T W11 (1) W11 (13)/{square root over (2)} 12 u12 = [1 −1 −1 1]T W12 (1) W12 (12)/{square root over (2)} 13 u13 = [1 −1 1 −1]T W13 (1) W13 (13)/{square root over (2)} 14 u14 = [1 1 −1 −1]T W14 (1) W14 (13)/{square root over (2)} 15 u15 = [1 1 1 1]T W15 (1) W15 (12)/{square root over (2)} 16 u16 = [1 −ej2π2/32 −ej4π2/32 −ej6π2/32]T W16 (1) W16 (23)/{square root over (2)} 17 u17 = [1 −ej2π10/32 −ej4π10/32 −ej6π10/32]T W17 (1) W17 (34)/{square root over (2)} 18 u18 = [1 −ej2π18/32 −ej4π18/32 −ej6π18/32]T W18 (1) W18 (13)/{square root over (2)} 19 u19 = [1 −ej2π26/32 −ej4π26/32 −ej6π26/32]T W19 (1) W19 (34)/{square root over (2)} 20 u20 = [1 −ej2π6/32 −ej4π6/32 −ej6π6/32]T W20 (1) W20 (13)/{square root over (2)} 21 u21 = [1 −ej2π14/32 −ej4π14/32 −ej6π14/32]T W21 (1) W21 (24)/{square root over (2)} 22 u22 = [1 −ej2π22/32 −ej4π22/32 −ej6π22/32]T W22 (1) W22 (12)/{square root over (2)} 23 u23 = [1 −ej2π30/32 −ej4π30/32 −ej6π30/32]T W23 (1) W23 (14)/{square root over (2)} 24 u24 = [1 −1 −j −j]T W24 (1) W24 (23)/{square root over (2)} 25 u25 = [1 −j j −1]T W25 (1) W25 (12)/{square root over (2)} 26 u26 = [1 1 −j j]T W26 (1) W26 (34)/{square root over (2)} 27 u27 = [1 j j 1]T W27 (1) W27 (13)/{square root over (2)} 28 u28 = [1 −1 j j]T W28 (1) W28 (12)/{square root over (2)} 29 u29 = [1 −j −j 1]T W29 (1) W29 (13)/{square root over (2)} 30 u30 = [1 1 j −j]T W30 (1) W30 (12)/{square root over (2)} 31 u31 = [1 j −j −1]T W31 (1) W31 (14)/{square root over (2)} 32 u32 = [1 −ej2π2/32 −ej40π/32 −ej44π/32]T W32 (1) W32 (12)/{square root over (2)} 33 u33 = [1 −ej2π10/32 −ej8π/32 −ej28π/32]T W33 (1) W33 (34)/{square root over (2)} 34 u34 = [1 −ej2π18/32 −ej40π/32 −ej12π/32]T W34 (1) W34 (14)/{square root over (2)} 35 u35 = [1 −ej2π26/32 −ej8π/32 −ej50π/32]T W35 (1) W35 (13)/{square root over (2)} 36 u36 = [1 −ej2π2/32 −ej24π/32 −ej28π/32]T W36 (1) W36 (12)/{square root over (2)} 37 u37 = [1 −ej2π10/32 −ej56π/32 −ej12π/32]T W37 (1) W37 (34)/{square root over (2)} 38 u38 = [1 −ej2π18/32 −ej24π21/32 −ej60π/32]T W38 (1) W38 (34)/{square root over (2)} 39 u39 = [1 −ej2π26/32 −ej56π/32 −ej44π/32]T W39 (1) W39 (14)/{square root over (2)} 40 u40 = [1 −ej2π2/32 −ej56π/32 −ej60π/32]T W40 (1) W40 (13)/{square root over (2)} 41 u41 = [1 −ej2π10/32 −ej24π/32 −ej44π/32]T W41 (1) W41 (23)/{square root over (2)} 42 u42 = [1 −ej2π18/32 −ej56π/32 −ej28π/32]T W42 (1) W42 (24)/{square root over (2)} 43 u43 = [1 −ej2π36/32 −ej24π/32 −ej12π/32]T W43 (1) W43 (24)/{square root over (2)} 44 u44 = [1 −ej2π6/32 −ej56π/32 −ej4π/32]T W44 (1) W44 (12)/{square root over (2)} 45 u45 = [1 −ej2π14/32 −ej24π/32 −ej52π/32]T W45 (1) W45 (13)/{square root over (2)} 46 u46 = [1 −ej2π22/32 −ej56π/32 −ej56π/32]T W46 (1) W46 (12)/{square root over (2)} 47 u47 = [1 −ej2π30/32 −ej24π/32 −ej20π/32]T W47 (1) W47 (12)/{square root over (2)} 48 u48 = [1 (−1 − j)/{square root over (2)} j (−1 + j)/{square root over (2)}]T W48 (1) W48 (34)/{square root over (2)} 49 u49 = [1 (1 − j)/{square root over (2)} −j (1 + j)/{square root over (2)}]T W49 (1) W49 (13)/{square root over (2)} 50 u50 = [1 (1 + j)/{square root over (2)} j (1 − j)/{square root over (2)}]T W50 (1) W50 (23)/{square root over (2)} 51 u51 = [1 (−1 + j)/{square root over (2)} −j (−1 − j)/{square root over (2)}]T W51 (1) W51 (12)/{square root over (2)} 52 u52 = [1 (−1 − j)/{square root over (2)} −1 (−1 − j)/{square root over (2)}]T W52 (1) W52 (12)/{square root over (2)} 53 u53 = [1 (−1 − j)/{square root over (2)} 1 (−1 + j)/{square root over (2)}]T W53 (1) W53 (13)/{square root over (2)} 54 u54 = [1 (1 + j)/{square root over (2)} −1 (1 + j)/{square root over (2)}]T W54 (1) W54 (12)/{square root over (2)} 55 u55 = [1 (−1 + j)/{square root over (2)} 1 (1 − j)/{square root over (2)}]T W55 (1) W55 (14)/{square root over (2)} 56 u56 = [1 (−1 − j)/{square root over (2)} 1 (1 + j)/{square root over (2)}]T W56 (1) W56 (23)/{square root over (2)} 57 u57 = [1 (−1 − j)/{square root over (2)} −1 (1 − j)/{square root over (2)}]T W57 (1) W57 (23)/{square root over (2)} 58 u58 = [1 (1 + j)/{square root over (2)} 1 (−1 − j)/{square root over (2)}]T W58 (1) W58 (23)/{square root over (2)} 59 u59 = [1 (−1 + j)/{square root over (2)} −1 (−1 + j)/{square root over (2)}]T W59 (1) W59 (14)/{square root over (2)} 60 u60 = [2 0 0 0]T W60 (1) W60 (12)/{square root over (2)} 61 u61 = [0 2 0 0]T W61 (2) W61 (12)/{square root over (2)} 62 u62 = [0 0 2 0]T W62 (3) W62 (13)/{square root over (2)} 63 u63 = [0 0 0 2]T W63 (4) W63 (23)/{square root over (2)} - Referring now to
FIG. 4 , a diagram of cross polarized antennas for which the codebook ofFIG. 3 may be designed to optimize performance in accordance with one or more embodiments will be discussed. An example cross polarized (X-Pol)antenna array 400 is shown inFIG. 4 having two pairs of antennas,antenna 410,antenna 412,antenna 414 andantenna 416, with the same spacing but the two pairs have different antenna polarizations. The different polarizations make the phase difference between the corresponding elements of the two pairs randomly distributed between 0 and 360 degrees wherein α, β˜[0, 2π]. Since a Discrete Fourier Transform (DFT) based codebook is utilized in Release 8 and Release 10 of the Third Generation Partnership Project (3GPP) standard, in one or more embodiments codebook 200 ofFIG. 3 may be optimized for cross polarization of the antennas while maintaining the backward compatibility as much as possible. For the vector codebook, the 4×1 codebook, the DFT vector has three properties. The magnitude of each entry is the same, the phase difference between any two adjacent entries remains the same for each vector; and the phase of each entry is picked from a finite alphabet: -
- The constant magnitude is for lowering the peak to average power ratio of the power amplifier. The constant phase difference is suitable for uniform linear arrays, which have evenly spaced antenna elements. However, the constant phase difference may not fit the cross polarized
antenna array 400. - In one or more embodiments, the codebook design may be optimized for cross polarized
antenna array 400 as a likely deployment scenario. Taking into account the phase structure of cross polarizedantenna array 400, we have the codebook structure may be created as discussed, below, while maintaining the backward compatibility as much as possible for the 3GPP standard in addition to addressing performance for crosspolarized antenna array 400. Examples of suitable codewords for such acodebook 200 having at least some Rank-1DFT vectors 218 and at least some Rank-1 vectors optimized forcross polarization 220 are shown by the Wn {k} terms in Table 1 and/or Table 2, above. - In general, one example process for design of such a codebook may be as follows:
- 1. The constant magnitude (or constant modulus) property of the legacy codebook is kept for backward compatibility and low PAPR.
- 2. The 4×1 codeword is of a structure (ej0 ejα ejβ ejβ+α), where α is for quantizing the phase difference between the two co-pol antennas and β is for quantizing the phase difference between the two pairs of the cross polarized
antennas 400. - 3. The α and β are selected from a finite alphabet, for example,
-
- 4. Although the α and β of the input channel vector are independently, randomly distributed over [0, 360 degrees], the α and β of the quantization codebook can be jointly designed. For example, letting β=2α results into a codeword structure of (ej0 ejα ej2α ej3α). This codeword structure may be suitable for a uniform linear array (ULA) of antennas, which also may be a useful deployment scenario in one or more embodiments. For covering the 2π range of β, one more structure may be needed, for example (ej0 ejα ej2α+nδ ej3αn+δ), where δ e.g.,
-
- is in the finite alphabet e.g.,
-
- and n is an integer taking values from 0, 1, . . . , N such that Nδ≦2π e.g., N=4. In other words, the stepping through of the α and β over [0, 360 degrees] may be synchronized in constructing the quantization codewords such that codewords of (ej0 ejα ej2α ej3α) structure may be generated without scarifying the quantization performance of cross
polarized antennas 400 and help the quantization performance of a uniform linear array (ULA) of antennas antenna as an additional benefit. It should be noted, however, that this is merely one example of a structure of acodebook 200 capable of accommodating crosspolarized antennas 400 while also maintaining backwards compatibility with a legacy 3GPP codebook, and the scope of the claimed subject matter is not limited in this respect. - Referring now to
FIG. 5 , a flow diagram of a method to perform a codeword search for a single user multiple-input, multiple-output (SU-MIMO) system in accordance with one or more embodiments will be discussed. It should be noted that althoughFIG. 5 illustrates one particular embodiment ofmethod 500, alternative embodiments ofmethod 500 may be realized for example wheremethod 500 includes more or fewer blocks than shown, and/or in various other orders, and the scope of the claimed subject matter is not limited in these respects. In one or more embodiments,UE 112 may optimize a codeword search method ifUE 112 has knowledge of the scheduling preference ofeNB 110. IfUE 112 is only configured with one channel state information (CSI) reporting process,eNB 110 needs a minimum of one bit for broadcasting a signaling to indicate its scheduling preference. In Release 10 of the Third Generation Partnership Project (3GPP) standard, it has been standardized thatUE 112 may be configured with two CSI reporting processes. In such an arrangement,eNB 110 may configure one CSI process for single user multiple-input, multiple-output (SU-MIMO) CSI and the other CSI process for multi-user multiple-input, multiple-output (MU-MIMO) CSI. Since one CSI process may be dedicated to MU-MIMO, in accordance with one or more embodiments, a codeword search process may be further optimized by leveraging both the rank-1 and rank-2 codebooks. - For a CSI search method for SU-MIMO as shown in
FIG. 5 ,UE 112 may perform a CSI search atblock 510 to find a best precoding matrix indicator (PMI) for each of rank-1 and rank-2. The PMI search algorithm for a given rank may be described by the following equation: -
- where Cr is the codebook of rank, r, H is the measured channel matrix of one subcarrier, ir is the best PMI for rank, r, and C is the interference covariance matrix. After
UE 112 determines the best PMI for each rank atblock 510, atblock 512UE 112 may select the best rank, rank-1 or rank-2, using the following equation: -
- At
block 514,UE 112 reports the better or best rank and the best PMI/CQI for the better or best rank accordingly. By utilizingmethod 500 ofFIG. 5 , the capacity for SU-MIMO may be maximized or nearly maximized, although the scope of the claimed subject matter is not limited in this respect. - Referring now to
FIG. 6 , a flow diagram of a method to perform a codeword search for a multi-user multiple-input, multiple-output (MU-MIMO) system in accordance with one or more embodiments will be discussed. It should be noted that althoughFIG. 6 illustrates one particular embodiment ofmethod 600, alternative embodiments ofmethod 600 may be realized for example wheremethod 600 includes more or fewer blocks than shown, and/or in various other orders, and the scope of the claimed subject matter is not limited in these respects. Atblock 610,UE 112 may perform a CSI search to find a better or best rank for rank-1 and rank-2 using each column of each codeword as a rank-1 precoder in the following equation: -
- where Cr is the codebook of rank r, R is the channel covariance matrix of one subcarrier or one band, and ir is the best PMI for rank r. After
UE 112 determines a better or best PMI for rank-1 and rank-2,UE 112 determines the better or best rank atblock 612 using the following equation: -
- At
block 614UE 112 then reports the better or best rank and the best PMI/CQI for the better or best rank accordingly. The algorithm ofmethod 600 may minimize the quantization error of the principal Eigen beam. It should be noted that it also may be possible to apply the better or best rank search equation ofblock 510 ofFIG. 5 to search for the best rank-1 vector for MU-MIMO instead of using the equations ofblock method 600, although performance may be suboptimal. Since the nesting property of the codebooks of Release 8 and Release 10 of the Third Generation Partnership Project (3GPP) standard reduces the codeword and/or rank search complexity with a tradeoff of performance, the nesting property optionally may be removed. Since the first column of each rank-2 codeword does not need to be the same as its corresponding rank-1 codeword, there are more rank-1 vectors available in rank-1 and rank-2 codebooks overall than before so that the quantization error of rank-1 input may be reduced. Therefore, in order to maximize the channel capacity using the MU-MIMO optimizedsearch method 600 ofFIG. 6 , the nesting constraint optionally need not be imposed on the newly added 48 codewords in Table 1 and/or Table 2 as discussed, above, although the scope of the claimed subject matter is not limited in this respect. - Referring now to
FIG. 7 , a block diagram of an information handling system capable of utilizing a codebook and/or performing a codebook search in accordance with one or more embodiments will be discussed.Information handling system 700 ofFIG. 7 may tangibly embody any one or more of the elements described herein, above, including forexample eNB 110 and/orUE 112, with greater or fewer components depending on the hardware specifications of the particular device. Althoughinformation handling system 700 represents one example of several types of computing platforms,information handling system 700 may include more or fewer elements and/or different arrangements of elements than shown inFIG. 7 , and the scope of the claimed subject matter is not limited in these respects. - In one or more embodiments,
information handling system 700 may include an application processor 710 and a baseband processor 712. Application processor 710 may be utilized as a general-purpose processor to run applications and the various subsystems forinformation handling system 700. Application processor 710 may include a single core or alternatively may include multiple processing cores wherein one or more of the cores may comprise a digital signal processor or digital signal processing (DSP) core. Furthermore, application processor 710 may include a graphics processor or coprocessor disposed on the same chip, or alternatively a graphics processor coupled to application processor 710 may comprise a separate, discrete graphics chip. Application processor 710 may include on board memory such as cache memory, and further may be coupled to external memory devices such as synchronous dynamic random access memory (SDRAM) 714 for storing and/or executing applications during operation, and NAND flash 716 for storing applications and/or data even wheninformation handling system 700 is powered off. In one or more embodiments, instructions to operate or configure theinformation handling system 700 and/or any of its components or subsystems to operate in a manner as described herein may be stored on a article of manufacture comprising a non-transitory storage medium. In one or more embodiments, the storage medium may comprise any of the memory devices shown in and described herein, although the scope of the claimed subject matter is not limited in this respect. Baseband processor 712 may control the broadband radio functions forinformation handling system 700. Baseband processor 712 may store code for controlling such broadband radio functions in a NOR flash 718. Baseband processor 712 controls a wireless wide area network (WWAN) transceiver 720 which is used for modulating and/or demodulating broadband network signals, for example for communicating via a 3GPP LTE or LTE-Advanced network or the like. - In general, WWAN transceiver 720 may operate according to any one or more of the following radio communication technologies and/or standards including but not limited to: a Global System for Mobile Communications (GSM) radio communication technology, a General Packet Radio Service (GPRS) radio communication technology, an Enhanced Data Rates for GSM Evolution (EDGE) radio communication technology, and/or a Third Generation Partnership Project (3GPP) radio communication technology, for example Universal Mobile Telecommunications System (UMTS), Freedom of Multimedia Access (FOMA), 3GPP Long Term Evolution (LTE), 3GPP Long Term Evolution Advanced (LTE Advanced), Code division multiple access 2000 (CDMA2000), Cellular Digital Packet Data (CDPD), Mobitex, Third Generation (3G), Circuit Switched Data (CSD), High-Speed Circuit-Switched Data (HSCSD), Universal Mobile Telecommunications System (Third Generation) (UMTS (3G)), Wideband Code Division Multiple Access (Universal Mobile Telecommunications System) (W-CDMA (UMTS)), High Speed Packet Access (HSPA), High-Speed Downlink Packet Access (HSDPA), High-Speed Uplink Packet Access (HSUPA), High Speed Packet Access Plus (HSPA+), Universal Mobile Telecommunications System-Time-Division Duplex (UMTS-TDD), Time Division-Code Division Multiple Access (TD-CDMA), Time Division-Synchronous Code Division Multiple Access (TD-CDMA), 3rd Generation Partnership Project Release 8 (Pre-4th Generation) (3GPP Rel. 8 (Pre-4G)), UMTS Terrestrial Radio Access (UTRA), Evolved UMTS Terrestrial Radio Access (E-UTRA), Long Term Evolution Advanced (4th Generation) (LTE Advanced (4G)), cdmaOne (2G), Code division multiple access 2000 (Third generation) (CDMA2000 (3G)), Evolution-Data Optimized or Evolution-Data Only (EV-DO), Advanced Mobile Phone System (1st Generation) (AMPS (1G)), Total Access Communication System/Extended Total Access Communication System (TACS/ETACS), Digital AMPS (2nd Generation) (D-AMPS (2G)), Push-to-talk (PTT), Mobile Telephone System (MTS), Improved Mobile Telephone System (IMTS), Advanced Mobile Telephone System (AMTS), OLT (Norwegian for Offentlig Landmobil Telefoni, Public Land Mobile Telephony), MTD (Swedish abbreviation for Mobiltelefonisystem D, or Mobile telephony system D), Public Automated Land Mobile (Autotel/PALM), ARP (Finnish for Autoradiopuhelin, “car radio phone”), NMT (Nordic Mobile Telephony), High capacity version of NTT (Nippon Telegraph and Telephone) (Hicap), Cellular Digital Packet Data (CDPD), Mobitex, DataTAC, Integrated Digital Enhanced Network (iDEN), Personal Digital Cellular (PDC), Circuit Switched Data (CSD), Personal Handy-phone System (PHS), Wideband Integrated Digital Enhanced Network (WiDEN), iBurst, Unlicensed Mobile Access (UMA), also referred to as also referred to as 3GPP Generic Access Network, or GAN standard), Zigbee, Bluetooth®, and/or general telemetry transceivers, and in general any type of RF circuit or RFI sensitive circuit. It should be noted that such standards may evolve over time, and/or new standards may be promulgated, and the scope of the claimed subject matter is not limited in this respect.
- The WWAN transceiver 720 couples to one or more power amps 722 respectively coupled to one or more antennas 724 for sending and receiving radio-frequency signals via the WWAN broadband network. The baseband processor 712 also may control a wireless local area network (WLAN) transceiver 726 coupled to one or more suitable antennas 728 and which may be capable of communicating via a Wi-Fi, Bluetooth®, and/or an amplitude modulation (AM) or frequency modulation (FM) radio standard including an IEEE 802.11a/b/g/n standard or the like. It should be noted that these are merely example implementations for application processor 710 and baseband processor 712, and the scope of the claimed subject matter is not limited in these respects. For example, any one or more of SDRAM 814, NAND flash 716 and/or NOR flash 718 may comprise other types of memory technology such as magnetic memory, chalcogenide memory, phase change memory, or ovonic memory, and the scope of the claimed subject matter is not limited in this respect.
- In one or more embodiments, application processor 710 may drive a
display 730 for displaying various information or data, and may further receive touch input from a user via atouch screen 732 for example via a finger or a stylus. An ambient light sensor 734 may be utilized to detect an amount of ambient light in whichinformation handling system 700 is operating, for example to control a brightness or contrast value fordisplay 730 as a function of the intensity of ambient light detected by ambient light sensor 734. One ormore cameras 736 may be utilized to capture images that are processed by application processor 710 and/or at least temporarily stored in NAND flash 716. Furthermore, application processor may couple to a gyroscope 738, accelerometer 740, magnetometer 742, audio coder/decoder (CODEC) 744, and/or global positioning system (GPS) controller 746 coupled to an appropriate GPS antenna 748, for detection of various environmental properties including location, movement, and/or orientation ofinformation handling system 700. Alternatively, controller 746 may comprise a Global Navigation Satellite System (GNSS) controller. Audio CODEC 744 may be coupled to one or more audio ports 750 to provide microphone input and speaker outputs either via internal devices and/or via external devices coupled to information handling system via the audio ports 750, for example via a headphone and microphone jack. In addition, application processor 710 may couple to one or more input/output (I/O) transceivers 752 to couple to one or more I/O ports 754 such as a universal serial bus (USB) port, a high-definition multimedia interface (HDMI) port, a serial port, and so on. Furthermore, one or more of the I/O transceivers 752 may couple to one ormore memory slots 756 for optional removable memory such as secure digital (SD) card or a subscriber identity module (SIM) card, although the scope of the claimed subject matter is not limited in these respects. - Referring now to
FIG. 8 , an isometric view of an information handling system ofFIG. 7 that optionally may include a touch screen in accordance with one or more embodiments will be discussed.FIG. 8 shows an example implementation ofinformation handling system 700 ofFIG. 7 tangibly embodied as a cellular telephone, smartphone, or tablet type device or the like. Theinformation handling system 700 may comprise ahousing 810 having a display 830 which may include a touch screen 832 for receiving tactile input control and commands via afinger 816 of a user and/or a viastylus 818 to control one or more application processors 710. Thehousing 810 may house one or more components ofinformation handling system 700, for example one or more application processors 710, one or more of SDRAM 714, NAND flash 716, NOR flash 718, baseband processor 712, and/or WWAN transceiver 720. Theinformation handling system 700 further may optionally include aphysical actuator area 820 which may comprise a keyboard or buttons for controlling information handling system via one or more buttons or switches. Theinformation handling system 700 may also include a memory port or slot 756 for receiving non-volatile memory such as flash memory, for example in the form of a secure digital (SD) card or a subscriber identity module (SIM) card. Optionally, theinformation handling system 700 may further include one or more speakers and/ormicrophones 824 and aconnection port 754 for connecting theinformation handling system 700 to another electronic device, dock, display, battery charger, and so on. In addition,information handling system 700 may include a headphone orspeaker jack 828 and one ormore cameras 736 on one or more sides of thehousing 810. It should be noted that theinformation handling system 700 ofFIG. 8 may include more or fewer elements than shown, in various arrangements, and the scope of the claimed subject matter is not limited in this respect. - Although the claimed subject matter has been described with a certain degree of particularity, it should be recognized that elements thereof may be altered by persons skilled in the art without departing from the spirit and/or scope of claimed subject matter. It is believed that the subject matter pertaining to cooperative multiple beam transmission and/or many of its attendant utilities will be understood by the forgoing description, and it will be apparent that various changes may be made in the form, construction and/or arrangement of the components thereof without departing from the scope and/or spirit of the claimed subject matter or without sacrificing all of its material advantages, the form herein before described being merely an explanatory embodiment thereof, and/or further without providing substantial change thereto. It is the intention of the claims to encompass and/or include such changes.
Claims (20)
1. A user equipment (UE), comprising:
a wireless transceiver having an array of one or more antennas; and
a processor coupled to the wireless transceiver and a memory coupled to the processor, the memory having a codebook stored therein, wherein the codebook comprises:
one or more rank-1 codewords;
at least one or more rank-2 codewords exhibiting a nesting property with the rank-1 codewords; and
one or more rank-2 codewords not exhibiting a nesting property with the rank-1 codewords.
2. A user equipment as claimed in claim 1 , wherein the rank-1 codewords include at least some Discrete Fourier Transform (DFT) vectors, and at least some vectors that are optimized for the array of antennas if the array of antennas is cross polarized.
3. A user equipment as claimed in claim 1 , wherein the processor is configured to perform a search of the codebook for single-user multiple-input, multiple-output (SU-MIMO) by:
performing a channel state information (CSI) search to find a best precoding matrix indicator (PMI) for the rank-1 codewords and the rank-2 codewords to maximize channel capacity;
selecting a better rank; and
reporting the better rank and the best PMI and CQI for the better rank.
4. A user equipment as claimed in claim 1 , wherein the processor is configured to perform a search of the codebook for multi-user multiple-input, multiple-output (MU-MIMO) by:
performing a channel state information (CSI) search to find a best precoding matrix indicator (PMI) for the rank-1 codewords and the rank-2 codewords using each column of each codeword as a rank-1 precoder;
selecting a better rank; and
reporting the better rank and the best PMI and CQI for the better rank to an enhanced Node B.
5. A user equipment as claimed in claim 1 , further comprising a touch screen to receive a touch input to control the processor.
6. A user equipment (UE), comprising:
a wireless transceiver having an array of one or more antennas; and
a processor coupled to the wireless transceiver and a memory coupled to the processor, the memory having a codebook stored therein, wherein the codebook comprises:
one or more rank-1 codewords; and
one or more rank-2 codewords;
wherein the rank-1 codewords include at least some Discrete Fourier Transform (DFT) vectors, and at least some vectors that are optimized for the array of antennas if the array of antennas is cross polarized.
7. A user equipment as claimed in claim 6 , wherein at least one or more rank-2 codewords exhibit a nesting property with the rank-1 codewords; and
one or more rank-2 codewords do not exhibit a nesting property with the rank-1 codewords.
8. A user equipment as claimed in claim 6 , wherein the processor is configured to perform a search of the codebook for single-user multiple-input, multiple-output (SU-MIMO) by:
performing a channel state information (CSI) search to find a best precoding matrix indicator (PMI) for the rank-1 codewords and the rank-2 codewords to maximize channel capacity;
selecting a better rank; and
reporting the better rank and the best PMI and CQI for the better rank.
9. A user equipment as claimed in claim 6 , wherein the processor is configured to perform a search of the codebook for multi-user multiple-input, multiple-output (MU-MIMO) by:
performing a channel state information (CSI) search to find a best precoding matrix indicator (PMI) for the rank-1 codewords and the rank-2 codewords using each column of each codeword as a rank-1 precoder;
selecting a better rank; and
reporting the better rank and the best PMI and CQI for the better rank to an enhanced Node B.
10. A user equipment as claimed in claim 6 , further comprising a touch screen to receive a touch input to control the processor.
11. A method to perform a codebook search, comprising:
performing a channel state information (CSI) search to find a best precoding matrix indicator (PMI) for rank-1 codewords and rank-2 codewords of the codebook;
selecting a better rank; and
reporting the better rank and the best PMI and CQI for the better rank.
12. A method as claimed in claim 11 , wherein said performing is implemented for single-user multiple-input, multiple-output (SU-MIMO).
13. A method as claimed in claim 11 , wherein said performing is implemented for multi-user multiple-input, multiple-output (MU-MIMO) by using each column of each codeword as a rank-1 precoder.
14. A method as claimed in claim 11 , wherein the codebook comprises:
one or more rank-1 codewords;
at least one or more rank-2 codewords exhibiting a nesting property with the rank-1 codewords; and
one or more rank-2 codewords not exhibiting a nesting property with the rank-1 codewords.
15. A method as claimed in claim 11 , wherein the rank-1 codewords include at least some Discrete Fourier Transform (DFT) vectors, and at least some vectors that are optimized for the array of antennas if the array of antennas is cross polarized.
16. An article of manufacture comprising a non-transitory medium having instructions thereon that, if executed, result in:
performing a channel state information (CSI) search to find a best precoding matrix indicator (PMI) for rank-1 codewords and rank-2 codewords of the codebook;
selecting a better rank; and
reporting the better rank and the best PMI and CQI for the better rank.
17. An article as claimed in claim 16 , wherein said performing is implemented for single-user multiple-input, multiple-output (SU-MIMO).
18. An article as claimed in claim 16 , wherein said performing is implemented for multi-user multiple-input, multiple-output (MU-MIMO) by using each column of each codeword as a rank-1 precoder.
19. An article as claimed in claim 16 , wherein the codebook comprises:
one or more rank-1 codewords;
at least one or more rank-2 codewords exhibiting a nesting property with the rank-1 codewords; and
one or more rank-2 codewords not exhibiting a nesting property with the rank-1 codewords.
20. An article as claimed in claim 16 , wherein the rank-1 codewords include at least some Discrete Fourier Transform (DFT) vectors, and at least some vectors that are optimized for the array of antennas if the array of antennas is cross polarized.
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Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20130265980A1 (en) * | 2011-09-29 | 2013-10-10 | Yuan Zhu | Higher order mu-mimo for lte-a |
US9258044B2 (en) * | 2013-03-08 | 2016-02-09 | Huawei Technologies Co., Ltd. | Method for feeding back precoding matrix indicator, receive end and transmit end |
US20170222699A1 (en) * | 2014-03-14 | 2017-08-03 | Telefonaktiebolaget Lm Ericsson (Publ) | Technique for Precoder Determination |
US20180254814A1 (en) * | 2015-09-14 | 2018-09-06 | Lg Electronics Inc. | Method for transmitting and receiving channel state information (csi) in wireless communication system, and apparatus therefor |
CN112543045A (en) * | 2019-09-23 | 2021-03-23 | 深圳市中兴微电子技术有限公司 | Method and device for acquiring PMI |
GB2588930A (en) * | 2019-11-14 | 2021-05-19 | British Broadcasting Corp | Multimedia system & method |
US11063642B2 (en) | 2019-09-11 | 2021-07-13 | Samsung Electronics Co., Ltd. | Apparatus and method for precoding data in wireless communication system |
WO2022236614A1 (en) * | 2021-05-10 | 2022-11-17 | Lenovo (Beijing) Limited | Method and apparatus for avoiding repeated state transition in small data transmission |
Families Citing this family (159)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3267727B1 (en) * | 2009-06-16 | 2019-03-27 | BlackBerry Limited | Method for accessing a service unavailable through a network cell |
EP2443873B1 (en) | 2009-06-16 | 2014-06-04 | BlackBerry Limited | Method for accessing a service unavailable through a network cell |
US9380602B2 (en) * | 2012-10-16 | 2016-06-28 | Lg Electronics Inc. | Method and station for accessing channel in wireless LAN |
US9647818B2 (en) | 2013-01-03 | 2017-05-09 | Intel IP Corporation | Apparatus and method for single-tone device discovery in wireless communication networks |
EP2962485B1 (en) | 2013-03-01 | 2019-08-21 | Intel IP Corporation | Wireless local area network (wlan) traffic offloading |
CN104066093B (en) * | 2013-03-18 | 2018-03-23 | 财团法人工业技术研究院 | Interference management method, anchor point equipment, base station and system of wireless communication system |
US10412649B2 (en) * | 2013-03-22 | 2019-09-10 | Lg Electronics Inc. | Method and apparatus for performing handover procedure in wireless communication system |
WO2014153705A1 (en) * | 2013-03-25 | 2014-10-02 | 华为技术有限公司 | Method and device for processing service of new carrier type cell and communication system |
WO2014153721A1 (en) * | 2013-03-26 | 2014-10-02 | 华为技术有限公司 | Method and system for transmitting data packet, terminal device and network device |
WO2014158264A1 (en) * | 2013-03-29 | 2014-10-02 | Intel IP Corporation | Quality-aware rate adaptation techniques for dash streaming |
WO2014161186A1 (en) * | 2013-04-03 | 2014-10-09 | 华为技术有限公司 | Service indication processing method and apparatus |
WO2014161200A1 (en) * | 2013-04-04 | 2014-10-09 | Qualcomm Incorporated | Service continuity with embms support on nct |
WO2014166884A1 (en) * | 2013-04-08 | 2014-10-16 | Telefonaktiebolaget L M Ericsson (Publ) | Congestion aware throughput targets |
US9992704B2 (en) | 2013-04-12 | 2018-06-05 | Provenance Asset Group Llc | Radio access network based traffic steering to non-cellular access |
US20140307551A1 (en) * | 2013-04-12 | 2014-10-16 | Nokia Siemens Networks Oy | Automatic learning of wi-fi neighbors and network characteristics |
US20160080958A1 (en) * | 2013-04-24 | 2016-03-17 | Nokia Technologies Oy | Logged measurements |
EP2995164B1 (en) * | 2013-05-08 | 2019-07-10 | Telefonaktiebolaget LM Ericsson (publ) | Packet data transfer re-establishment |
CN105122672B (en) * | 2013-05-09 | 2018-11-27 | 英特尔Ip公司 | small data communication |
CN105556928B (en) * | 2013-05-20 | 2019-06-11 | 诺基亚技术有限公司 | Via proxy access data source |
US8903373B1 (en) | 2013-05-27 | 2014-12-02 | Cisco Technology, Inc. | Method and system for coordinating cellular networks operation |
WO2014203434A1 (en) * | 2013-06-17 | 2014-12-24 | 日本電気株式会社 | Device, method and non-temporary computer-readable medium, for self-organizing network |
US20140376517A1 (en) * | 2013-06-25 | 2014-12-25 | Qualcomm Incorporated | Opportunistic activation of relays in cloud radio access networks |
CN105359539B (en) | 2013-07-02 | 2018-10-26 | 索尼公司 | Content supply device, Content supply method, terminal installation and contents providing system |
US9629013B2 (en) * | 2013-07-18 | 2017-04-18 | Marvell World Trade Ltd. | Channel quality indication with filtered interference |
EP3031146B1 (en) * | 2013-08-08 | 2019-02-20 | Intel IP Corporation | Method, apparatus and system for electrical downtilt adjustment in a multiple input multiple output system |
US9326122B2 (en) | 2013-08-08 | 2016-04-26 | Intel IP Corporation | User equipment and method for packet based device-to-device (D2D) discovery in an LTE network |
CN104685913B (en) * | 2013-08-09 | 2019-03-19 | 华为技术有限公司 | Frequency spectrum updates application method, system and white spectrum device |
KR102119247B1 (en) * | 2013-11-01 | 2020-06-04 | 삼성전자주식회사 | 2-step discovery procedure for d2d communication |
US9705693B1 (en) * | 2013-12-10 | 2017-07-11 | Marvell International Ltd. | Provisioning using multicast traffic |
US10341890B2 (en) * | 2013-12-13 | 2019-07-02 | Qualcomm Incorporated | CSI feedback in LTE/LTE-advanced systems with unlicensed spectrum |
WO2015100548A1 (en) * | 2013-12-30 | 2015-07-09 | 华为技术有限公司 | Method for transmitting small data packet, base station, and user equipment |
JP2015142225A (en) * | 2014-01-28 | 2015-08-03 | ソニー株式会社 | Device |
KR101418698B1 (en) * | 2014-02-03 | 2014-07-10 | 박상래 | System, method and computer readable recording medium for controlling of wireless emergency bell |
US20150230122A1 (en) * | 2014-02-07 | 2015-08-13 | Telefonaktiebolaget L M Ericsson (Publ) | Mtc device, serving node, and various methods for implementing an uplink stack reduction feature |
US20150230121A1 (en) * | 2014-02-07 | 2015-08-13 | Telefonaktiebolaget L M Ericsson (Publ) | Mtc device, serving node, and various methods for implementing a downlink stack reduction feature |
WO2015127241A1 (en) * | 2014-02-21 | 2015-08-27 | Convida Wireless, Llc | Handover in integrated small cell and wifi networks |
US10172054B2 (en) * | 2014-03-20 | 2019-01-01 | Kyocera Corporation | Communication control method and user terminal |
CN104955128B (en) * | 2014-03-26 | 2020-09-15 | 中兴通讯股份有限公司 | Load information transmission method and system, and network element |
IN2014MU01113A (en) * | 2014-03-28 | 2015-10-02 | Tech Mahindra Ltd | |
US9800363B2 (en) * | 2014-06-18 | 2017-10-24 | Qualcomm Incorporated | NAICS signaling for advanced LTE features |
US9781006B2 (en) * | 2014-06-24 | 2017-10-03 | Ruckus Wireless, Inc. | Group isolation in wireless networks |
US20170164407A1 (en) * | 2014-06-26 | 2017-06-08 | Lg Electronics Inc. | Method for transmitting and receiving control information for broadcast multicast service, and device therefor |
US9838948B2 (en) * | 2014-07-29 | 2017-12-05 | Aruba Networks, Inc. | Deep packet inspection (DPI) aware client steering and load balancing in wireless local area network (WLAN) infrastructure |
US9794896B2 (en) * | 2014-08-19 | 2017-10-17 | Xiaomi Inc. | Method and device for adjusting state of wireless network |
US20160057687A1 (en) * | 2014-08-19 | 2016-02-25 | Qualcomm Incorporated | Inter/intra radio access technology mobility and user-plane split measurement configuration |
JP6479823B2 (en) * | 2014-08-25 | 2019-03-06 | 京セラ株式会社 | Base station, processor and network device |
US9887907B2 (en) | 2014-09-18 | 2018-02-06 | Qualcomm Incorporated | Base station initiated control mechanism for supporting supplemental link |
WO2016049880A1 (en) * | 2014-09-30 | 2016-04-07 | 华为技术有限公司 | Data transmission method and terminal |
EP3177047A4 (en) * | 2014-09-30 | 2017-07-19 | Huawei Technologies Co., Ltd. | Terminal, base station, system, and notification method |
CN107006058B (en) * | 2014-10-23 | 2020-07-24 | 苹果公司 | Connection control for Machine Type Communication (MTC) devices |
US9578530B2 (en) * | 2014-12-09 | 2017-02-21 | Futurewei Technologies, Inc. | Method and apparatus for determining cell states to adjust antenna configuration parameters |
US9769689B2 (en) | 2014-12-09 | 2017-09-19 | Futurewei Technologies, Inc. | Method and apparatus for optimizing cell specific antenna configuration parameters |
US10367875B2 (en) * | 2014-12-23 | 2019-07-30 | Telecom Italia S.P.A. | Method and system for dynamic rate adaptation of a stream of multimedia contents in a wireless communication network |
US10880357B2 (en) * | 2014-12-23 | 2020-12-29 | Adobe Inc. | Reducing requests for media segments in streaming of multimedia content |
US10812546B2 (en) | 2014-12-24 | 2020-10-20 | Intel IP Corporation | Link-aware streaming adaptation |
US10813155B2 (en) * | 2015-02-06 | 2020-10-20 | Sony Corporation | Wireless communication apparatus and wireless communication method for connection to a wireless network |
CN107251467A (en) | 2015-02-12 | 2017-10-13 | 诺基亚技术有限公司 | The polymerization of cellular network and WLAN |
US9924406B2 (en) * | 2015-03-02 | 2018-03-20 | Verizon Patent And Licensing Inc. | Blended data transmission network for machine type communications |
CN104768122B (en) * | 2015-03-16 | 2018-08-24 | 深圳酷派技术有限公司 | Data sharing method, device based on the direct-connected communication of terminal and terminal |
US10869344B2 (en) | 2015-03-19 | 2020-12-15 | Acer Incorporated | Method of radio bearer transmission in dual connectivity |
US9781736B2 (en) | 2015-03-25 | 2017-10-03 | Huawei Technologies Co., Ltd. | Offloading of controlling across access nodes |
US10499328B2 (en) * | 2015-04-06 | 2019-12-03 | Cable Television Laboratories, Inc. | Self-organizing network (SON) with fast initial link setup (FILS) |
US9998921B2 (en) | 2015-04-06 | 2018-06-12 | Cable Television Laboratories, Inc. | Self-organizing network (SON) with fast initial link setup (FILS) |
US20180139143A1 (en) * | 2015-04-10 | 2018-05-17 | Kyocera Corporation | Methods and systems for exchanging information over a control plane between wlan and 3gpp ran for traffic steering threshold determination |
CN106162911B (en) * | 2015-04-17 | 2021-12-07 | 索尼公司 | Electronic device and method for wireless communication |
US10869345B1 (en) | 2015-04-27 | 2020-12-15 | Marvell Asia Pte, Ltd. | Systems and methods for provisioning devices for WLAN |
US10038609B2 (en) | 2015-06-19 | 2018-07-31 | Cisco Technology, Inc. | Network traffic analysis |
ES2881502T3 (en) * | 2015-06-29 | 2021-11-29 | Huawei Tech Co Ltd | Method, apparatus and system for word control in multiple MCPTT systems |
WO2017005316A1 (en) * | 2015-07-08 | 2017-01-12 | Telefonaktiebolaget Lm Ericsson (Publ) | Performance improvement in wireless communications networks |
CN107852596A (en) * | 2015-07-24 | 2018-03-27 | 日本电气株式会社 | GSM, MME, terminal and communication means |
EP3322240A4 (en) * | 2015-08-06 | 2018-07-11 | Huawei Technologies Co., Ltd. | Method and apparatus for establishing data radio bearer |
US10728953B2 (en) * | 2015-08-13 | 2020-07-28 | Nokia Solutions And Networks Oy | Inactivity timer evaluation |
US10484441B2 (en) * | 2015-09-08 | 2019-11-19 | Verizon Patent And Licensing Inc. | Switching between unicast streams and a multicast stream based on content demand |
KR102461929B1 (en) * | 2015-09-25 | 2022-11-02 | 삼성전자주식회사 | Apparatus and method for receiving streaming service data in mobile communication system supporting a plurality of radio access interfaces |
US10075875B2 (en) | 2015-09-29 | 2018-09-11 | International Business Machines Corporation | Adaptive network with interconnected autonomous devices |
EP3154281A1 (en) * | 2015-10-05 | 2017-04-12 | Nokia Technologies Oy | Wireless local area network (wlan) radio link failure (rlf) triggering |
CN105407494B (en) * | 2015-10-23 | 2018-10-30 | 中国联合网络通信集团有限公司 | Network capacity extension method and device |
FR3043522A1 (en) * | 2015-11-10 | 2017-05-12 | Orange | TRANSMITTING VARIABLE VOLUME DATA IN A MOBILE COMMUNICATION NETWORK |
WO2017084726A1 (en) * | 2015-11-20 | 2017-05-26 | Nec Europe Ltd. | Seamless sdn-supported ran-app migration |
US10021402B2 (en) * | 2015-12-16 | 2018-07-10 | Dialogic Corporation | Estimation of video quality of experience on media servers |
US10609616B2 (en) | 2015-12-22 | 2020-03-31 | Alfred Consulting LLC | System and method for using mobility information in heterogeneous networks |
WO2017136068A1 (en) * | 2016-02-03 | 2017-08-10 | Intel Corporation | Csi (channel state information)-rs (reference signal) overhead reduction for class b fd (full dimensional)-mimo (multiple input multiple output) systems |
EP3417653B1 (en) * | 2016-02-15 | 2021-08-25 | Corning Optical Communications LLC | Methods for centralized channel selection across different cells in a radio access network |
US10341994B2 (en) * | 2016-03-25 | 2019-07-02 | Nokia Of America Corporation | Autonomous wireless transmissions |
KR102458067B1 (en) * | 2016-03-30 | 2022-10-24 | 삼성전자 주식회사 | Method and apparatus for transmitting signal in wireless communication |
CN109155904B (en) | 2016-03-31 | 2022-06-07 | 诺基亚通信公司 | Apparatus and method for supporting local Multimedia Broadcast Multicast Service (MBMS) distribution |
WO2017177076A1 (en) | 2016-04-08 | 2017-10-12 | Cloud Knox, Inc. | Activity based access control in heterogeneous environments |
US20170302421A1 (en) * | 2016-04-13 | 2017-10-19 | Mediatek Inc. | Signaling Enhancement for Fast Network Entry |
US10582412B2 (en) * | 2016-05-12 | 2020-03-03 | M2MD Technologies, Inc. | Method and system for providing low bandwidth and high bandwidth communications services using different user equipment profiles |
CN107368737A (en) * | 2016-05-13 | 2017-11-21 | 阿里巴巴集团控股有限公司 | A kind of processing method for preventing copy-attack, server and client |
EP3479645A1 (en) * | 2016-07-04 | 2019-05-08 | Telefonaktiebolaget LM Ericsson (PUBL) | Efficient delivery method and apparatuses for infrequent small data |
US10389785B2 (en) * | 2016-07-17 | 2019-08-20 | Wei-Chung Chang | Method for adaptively streaming an audio/visual material |
CN107734465B (en) | 2016-08-12 | 2019-12-20 | 电信科学技术研究院 | Method for transmitting multicast service, method and device for receiving multicast service |
CN107734468B (en) * | 2016-08-12 | 2020-07-28 | 中兴通讯股份有限公司 | Multicast transmission method and device |
US11277765B2 (en) * | 2016-09-29 | 2022-03-15 | Nokia Technologies Oy | Adaptive media service |
CN109952747A (en) * | 2016-11-04 | 2019-06-28 | 瑞典爱立信有限公司 | For managing method, computer program, carrier, computer program product and the device of the small data transmission from user equipment |
WO2018088756A1 (en) * | 2016-11-09 | 2018-05-17 | 엘지전자 주식회사 | Method for transmitting rrc message and wireless device |
CN108184214A (en) * | 2016-12-08 | 2018-06-19 | 中兴通讯股份有限公司 | A kind of method and device of determining data sender's formula |
CN116634608A (en) * | 2016-12-23 | 2023-08-22 | 富士通株式会社 | Data transmitting/receiving device, method and communication system |
CN106789252A (en) * | 2016-12-23 | 2017-05-31 | 盛科网络(苏州)有限公司 | The chip method that APS is switched fast is realized in a kind of OAM linkages |
CN106658733B (en) * | 2016-12-28 | 2020-04-21 | 南京邮电大学 | Throughput optimization method based on user fairness and QoS in multi-user MIMO-OFDM |
US10893446B2 (en) * | 2017-01-05 | 2021-01-12 | Lg Electronics Inc. | Method and apparatus for transmitting QoS flow to DRB mapping rule |
US10721763B2 (en) * | 2017-01-20 | 2020-07-21 | Qualcomm Incorporated | Small packet optimizations for internet-of-things applications |
US10499448B2 (en) | 2017-02-03 | 2019-12-03 | Motorola Mobility Llc | Configuration information for an inactive state |
KR102012264B1 (en) * | 2017-02-07 | 2019-08-22 | 한국전자통신연구원 | Method and apparatus for compensating outage cell in small cell network |
US11032393B2 (en) | 2017-03-21 | 2021-06-08 | Telefonaktiebolaget Lm Ericsson (Publ) | Network node and method performed thereby providing a recommendation associated with a service to a wireless device |
US10484992B2 (en) * | 2017-04-05 | 2019-11-19 | Qualcomm Incorporated | Channel reservation for multi-user scheduling |
CN106982454B (en) * | 2017-05-10 | 2019-11-05 | 重庆邮电大学 | A kind of user access method based on load |
WO2018212571A1 (en) * | 2017-05-15 | 2018-11-22 | Samsung Electronics Co., Ltd. | Method and system for notifying state of members of mission critical service (mcx) groups |
US10630453B2 (en) * | 2017-08-10 | 2020-04-21 | At&T Intellectual Property I, L.P. | Facilitating restriction of channel state information to improve communication coverage in 5G or other next generation networks |
CN107396384B (en) * | 2017-08-15 | 2020-06-19 | 北京小米移动软件有限公司 | Wireless connection establishing method and device |
US11039497B2 (en) * | 2017-09-18 | 2021-06-15 | Qualcomm Incorporated | User plane based small data service |
CN107872808B (en) * | 2017-09-26 | 2020-09-08 | 中通服建设有限公司 | WLAN station address prediction analysis method and device |
CN107682055B (en) * | 2017-10-30 | 2020-11-10 | 华北电力大学(保定) | User selection method based on energy cost in wireless heterogeneous network |
US11368362B2 (en) | 2017-11-07 | 2022-06-21 | Apple Inc. | Transport network layer associations on the FI interface |
CN107708152B (en) * | 2017-11-28 | 2021-06-18 | 重庆邮电大学 | Task unloading method of heterogeneous cellular network |
US10448261B2 (en) * | 2018-01-09 | 2019-10-15 | P.I. Works U.S., Inc. | Method for capacity and coverage optimization of a multi-RAT network |
CN110087245A (en) * | 2018-01-26 | 2019-08-02 | 华北电力大学 | Heterogeneous network base station deployment and frequency spectrum pricing scheme based on optimal utility |
US20190238605A1 (en) * | 2018-01-31 | 2019-08-01 | Salesforce.Com, Inc. | Verification of streaming message sequence |
US10419077B1 (en) * | 2018-03-28 | 2019-09-17 | Google Llc | Wireless communication via a mobile relay |
JP7204771B2 (en) * | 2018-06-06 | 2023-01-16 | インテル コーポレイション | Methods, systems, and apparatus for coordinating multiple access point scheduling and transmission |
US11438915B2 (en) * | 2018-06-08 | 2022-09-06 | Telefonaktiebolaget Lm Ericsson (Publ) | SDMA carrier sharing |
EP3815450A1 (en) | 2018-06-28 | 2021-05-05 | Convida Wireless, Llc | Prioritization procedures for nr v2x sidelink shared channel data transmission |
US10805862B2 (en) | 2018-08-03 | 2020-10-13 | T-Mobile Usa, Inc. | Sensor and self-learning based dynamic frequency assignment for wireless networks |
JP7247199B2 (en) * | 2018-08-08 | 2023-03-28 | 株式会社Nttドコモ | Radio access system and communication equipment |
US10750378B2 (en) | 2018-08-23 | 2020-08-18 | John Mezzalingua Associates, LLC | System and method for creating and managing private subnetworks of LTE base stations |
JP7119215B2 (en) | 2018-08-23 | 2022-08-16 | ブリティッシュ・テレコミュニケーションズ・パブリック・リミテッド・カンパニー | cellular telecommunications network |
GB201815377D0 (en) | 2018-09-21 | 2018-11-07 | British Telecomm | Cellular telecommunications network |
CN114302471A (en) * | 2018-11-13 | 2022-04-08 | 阿尔弗雷德咨询有限公司 | System and method for using mobility information in heterogeneous networks |
CN109787856B (en) * | 2018-12-19 | 2021-03-02 | 西安交通大学 | HAS bandwidth prediction method based on LTE network link state |
US11496959B2 (en) | 2019-01-31 | 2022-11-08 | Hewlett Packard Enterprise Development Lp | Establishing and controlling connection of user equipment to a heterogeneous network |
EP3927039A4 (en) * | 2019-02-14 | 2022-04-13 | Panasonic Intellectual Property Corporation of America | Terminal and communication method |
EP3843467B1 (en) * | 2019-02-27 | 2024-04-10 | Spreadtrum Communications (Shanghai) Co., Ltd. | Wireless connection method, device group, system, and storage medium |
US11202339B2 (en) * | 2019-04-10 | 2021-12-14 | Mediatek Inc. | Apparatuses and methods for packet distribution on multiple subscriber identities |
US10523549B1 (en) * | 2019-06-02 | 2019-12-31 | Cybertoka Ltd | Method and system for detecting and classifying networked devices |
US11937134B1 (en) | 2019-08-02 | 2024-03-19 | T-Mobile Innovations Llc | Wireless communication service using multiple radio access technology (RAT) types |
CN110278024B (en) * | 2019-08-07 | 2020-07-24 | 清华大学 | System capacity optimization method and device for satellite communication constellation |
BR112022001665A2 (en) * | 2019-08-16 | 2022-03-22 | Ericsson Telefon Ab L M | Methods performed on a first entity to transmit and on a second entity to receive a plurality of media access control addresses, first entity, second entity, computer readable storage medium, method implemented in a communication system, and, system of communication |
US11526826B2 (en) * | 2019-11-07 | 2022-12-13 | Nokia Solutions And Networks Oy | Remote definition of metrics |
US11445570B1 (en) | 2019-11-25 | 2022-09-13 | Sprint Communications Company L.P. | Transmission control protocol (TCP) control over radio communications |
US11134503B2 (en) * | 2019-11-26 | 2021-09-28 | T-Mobile Usa, Inc. | Dynamic allocation of transmission slots based on UE information |
US11350150B2 (en) * | 2019-12-26 | 2022-05-31 | Hughes Network Systems, Llc | Method for estimation of quality of experience (QoE) metrics for video streaming using passive measurements |
US11570752B2 (en) * | 2019-12-30 | 2023-01-31 | Qualcomm Incorporated | Monitoring multicast broadcast control information |
WO2021165725A1 (en) * | 2020-02-21 | 2021-08-26 | Nokia Solutions And Networks Oy | Coordination of compensation of network part failure impacts |
CN113676202B (en) * | 2020-04-30 | 2022-10-18 | 华为技术有限公司 | Multi-radio-frequency anti-interference method and related equipment |
US11277318B2 (en) * | 2020-04-30 | 2022-03-15 | Accenture Global Solutions Limited | Analyzing a communication network device, based on capacity analyses associated with decommissioning the communication network device, to determine next actions |
CN113966631B (en) * | 2020-05-20 | 2023-10-03 | 北京小米移动软件有限公司 | Data transmission method, device, communication equipment and storage medium |
US20210377951A1 (en) * | 2020-05-29 | 2021-12-02 | Qualcomm Incorporated | Facilitating multi-cluster control resource sets for downlink control channel repetition |
US11234178B2 (en) | 2020-06-16 | 2022-01-25 | Apple Inc. | High data mode for enhanced user experience in cellular networks |
US11438273B2 (en) * | 2020-07-20 | 2022-09-06 | Altiostar Networks, Inc. | Real-time processing in wireless communications systems |
EP4213582A1 (en) * | 2020-08-31 | 2023-07-19 | Ofinno, LLC | Subsequent data information for small data transmission |
EP4022971A1 (en) * | 2020-09-24 | 2022-07-06 | Ofinno, LLC | Release message in small data transmission procedure |
US11963248B2 (en) * | 2020-10-21 | 2024-04-16 | Intel Corporation | Small data transmission (SDT) procedures and failure recovery during an inactive state |
CN114666913A (en) * | 2020-12-24 | 2022-06-24 | 夏普株式会社 | Method executed by user equipment and user equipment |
US20220272136A1 (en) * | 2021-02-19 | 2022-08-25 | International Business Machines Corporatlion | Context based content positioning in content delivery networks |
US11974339B2 (en) * | 2021-04-06 | 2024-04-30 | Microchip Technology Incorporated | Provisioning headless WiFi devices and related systems, methods and devices |
WO2022217441A1 (en) | 2021-04-12 | 2022-10-20 | Nokia Shanghai Bell Co., Ltd. | Methods, devices, and medium for handling of non-sdt data |
US11943705B2 (en) | 2021-06-11 | 2024-03-26 | Skylo Technologies, Inc. | RF (radio frequency) virtualization architecture |
US11956685B2 (en) | 2021-11-17 | 2024-04-09 | Cisco Technology, Inc. | Son function for dynamically configured RU in multi-protocol ran |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20130250868A1 (en) * | 2011-09-18 | 2013-09-26 | Nec Laboratories America, Inc. | User Pairing and Resource Allocation for Downlink Multiuser Multi-Input-Multi-Output In Long Term Evolution Advanced Systems |
Family Cites Families (205)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7346008B1 (en) * | 1999-10-15 | 2008-03-18 | Alcatel Canada Inc. | Method and apparatus for data driven network management |
US6987770B1 (en) * | 2000-08-04 | 2006-01-17 | Intellon Corporation | Frame forwarding in an adaptive network |
US7068683B1 (en) * | 2000-10-25 | 2006-06-27 | Qualcomm, Incorporated | Method and apparatus for high rate packet data and low delay data transmissions |
KR100396030B1 (en) | 2000-12-27 | 2003-08-27 | 주식회사 하이닉스반도체 | Method for shrink/unshrink using power bank in base station system |
US20020101632A1 (en) * | 2001-01-30 | 2002-08-01 | Milton Meckler | Wireless laser beam communications system for stationary and mobile users |
JP2002300181A (en) * | 2001-03-30 | 2002-10-11 | Nec Corp | INTEGRATED NETWORK QoS CONTROL SYSTEM |
KR20040076856A (en) * | 2001-10-29 | 2004-09-03 | 엠피네트 인터네셔널, 인크. | System, method, and data structure for multimedia communications |
US6856604B2 (en) * | 2001-12-19 | 2005-02-15 | Qualcomm Incorporated | Efficient multi-cast broadcasting for packet data systems |
US6765891B2 (en) | 2002-04-03 | 2004-07-20 | Nokia Corporation | Method and apparatus providing for the immediate start of 3G measurements in dedicated mode on a cell with a packet broadcast control channel |
US7948951B2 (en) * | 2002-06-12 | 2011-05-24 | Xocyst Transfer Ag L.L.C. | Automatic peer discovery |
US6874015B2 (en) * | 2002-12-16 | 2005-03-29 | International Business Machines Corporation | Parallel CDN-based content delivery |
KR100950663B1 (en) | 2002-12-26 | 2010-04-02 | 삼성전자주식회사 | Method for inter-radio access technology cell reselection in multi-radio access technology mobile |
US20040131078A1 (en) | 2003-01-03 | 2004-07-08 | Gupta Vivek G. | Apparatus and method for supporting multiple wireless technologies within a device |
US20030108030A1 (en) | 2003-01-21 | 2003-06-12 | Henry Gao | System, method, and data structure for multimedia communications |
US20050043026A1 (en) | 2003-01-22 | 2005-02-24 | Jacco Brok | System and method for establishing and/or maintaining a data session across packet data networks |
US7362742B1 (en) * | 2003-01-28 | 2008-04-22 | Cisco Technology, Inc. | Methods and apparatus for synchronizing subnet mapping tables |
US7295549B2 (en) * | 2003-02-14 | 2007-11-13 | Ntt Docomo, Inc. | Source and channel rate adaptation for VoIP |
SE0300555D0 (en) | 2003-02-24 | 2003-02-24 | Ericsson Telefon Ab L M | Improvements in or relating to push-to-talk services |
KR100547876B1 (en) * | 2003-03-25 | 2006-01-31 | 삼성전자주식회사 | Apparatus and method for selecting access network in multiple wireless communication networks |
US7397805B2 (en) * | 2003-04-02 | 2008-07-08 | Ntt Docomo Inc. | Systems and methods for goodput guarantee through adaptive fair queuing |
CN100539745C (en) | 2003-12-05 | 2009-09-09 | 北方电讯网络有限公司 | The method for communicating in press-to-talk session of mobile radio station and execution thereof |
KR20050063652A (en) | 2003-12-22 | 2005-06-28 | 한국전자통신연구원 | A method for constituting a layered cell in ofdma system |
CN1943257B (en) * | 2004-04-08 | 2011-03-16 | 皇家飞利浦电子股份有限公司 | Method and system for the allocation of uwb transmission based on spectrum opportunities |
TWI277351B (en) * | 2004-08-06 | 2007-03-21 | Ind Tech Res Inst | Method and system for selecting an access network in a heterogeneous network environment |
US20060092890A1 (en) * | 2004-11-01 | 2006-05-04 | Gupta Vivek G | Global network neighborhood: scheme for providing information about available networks in a geographical location |
US9088876B2 (en) * | 2012-02-01 | 2015-07-21 | Kodiak Networks, Inc. | WiFi interworking solutions for push-to-talk-over-cellular (PoC) |
US7577438B2 (en) * | 2005-04-25 | 2009-08-18 | Interdigital Technology Corporation | Method and system for efficient addressing and power savings in wireless systems |
US20060268711A1 (en) | 2005-05-27 | 2006-11-30 | Doradla Anil K | Network selection terminal |
US7856001B2 (en) * | 2005-06-15 | 2010-12-21 | U4Ea Wireless, Inc. | Wireless mesh routing protocol utilizing hybrid link state algorithms |
KR20070016507A (en) * | 2005-08-04 | 2007-02-08 | 삼성전자주식회사 | Apparatus and method for sensor network using broadband wireless access communication system |
US20070274233A1 (en) | 2006-05-25 | 2007-11-29 | Amnon Ptashek | Method, apparatus and system for multi peer to peer services |
US9049651B2 (en) * | 2006-08-25 | 2015-06-02 | Qualcomm Incorporated | Selection of an access point in a communications system |
WO2008035905A1 (en) | 2006-09-19 | 2008-03-27 | Samsung Electronics Co., Ltd. | Method and apparatus for performing discontinuous reception operation by connected mode user equipment in a mobile communication system |
US8064342B2 (en) * | 2006-10-27 | 2011-11-22 | Verizon Patent And Licensing Inc. | Load balancing session initiation protocol (SIP) servers |
CN101647310B (en) * | 2006-10-31 | 2014-08-27 | Tti发明A有限责任公司 | Dynamic network selection using kernels |
US8130917B2 (en) | 2006-12-21 | 2012-03-06 | Verizon Data Services Llc | Method and apparatus for group messaging |
US8139496B2 (en) * | 2007-03-06 | 2012-03-20 | Spectrum Bridge, Inc. | System and method for policing spectrum usage |
US7873010B2 (en) * | 2007-03-07 | 2011-01-18 | Motorola Mobility, Inc. | Control signaling resource assignment in wireless communication networks |
US11362774B2 (en) * | 2007-03-20 | 2022-06-14 | Nokia Technologies Oy | Transmission adaptation in a wireless network |
US20080279147A1 (en) * | 2007-05-08 | 2008-11-13 | Microsoft Corporation | Spectrum auction and sharing on wireless clients |
JP5129331B2 (en) * | 2007-08-17 | 2013-01-30 | ノキア コーポレイション | System and method using frequency band flipping for data retransmission |
US20090059831A1 (en) | 2007-08-28 | 2009-03-05 | Gang Li | Method of communicating a multi-user packet to a group of users |
KR101132592B1 (en) * | 2007-09-14 | 2012-04-06 | 엔이씨 유럽 리미티드 | Method and system for optimizing network performances |
US8270972B2 (en) | 2007-10-23 | 2012-09-18 | Motorola Mobility Llc | Method and apparatus for detecting an alternate wireless communication network |
US8824684B2 (en) * | 2007-12-08 | 2014-09-02 | International Business Machines Corporation | Dynamic, selective obfuscation of information for multi-party transmission |
KR101559320B1 (en) * | 2008-02-18 | 2015-10-13 | 삼성전자주식회사 | Mobile system and base station system for effectively using licensed spectrum and shared spectrum |
US20090268624A1 (en) | 2008-04-28 | 2009-10-29 | Sharp Laboratories Of America, Inc. | Systems and methods for measurement and feedback of channel quality indicator information |
RU2494555C2 (en) * | 2008-04-30 | 2013-09-27 | Нокиа Сименс Нетуоркс Ой | Transmitting node b load status information in self-organising network |
JP5517079B2 (en) | 2008-05-09 | 2014-06-11 | マーベル ワールド トレード リミテッド | Method, program for providing location-aware Wi-Fi access for a mobile device, and mobile device providing Wi-Fi access for location recognition |
WO2009149761A1 (en) | 2008-06-13 | 2009-12-17 | Nokia Siemens Networks Oy | Target access point selection policies based on access point category tags |
MX2010012932A (en) | 2008-07-02 | 2011-02-25 | Ericsson Telefon Ab L M | Automatic configuration of inter-domain access technology neighbor relations. |
US20100061346A1 (en) | 2008-09-05 | 2010-03-11 | Nokia Siemens Networks Oy | Channel quality feedback signal for wireless networks |
US8391882B2 (en) * | 2008-10-22 | 2013-03-05 | Qualcomm Incorporated | Method and system for interference management in a spectrum shared by WAN and femto cells |
WO2010053984A2 (en) | 2008-11-04 | 2010-05-14 | Nortel Networks Limited | Providing a downlink control structure in a first carrier to indicate control information in a second, different carrier |
WO2010060483A1 (en) * | 2008-11-27 | 2010-06-03 | Nokia Siemens Networks Oy | Method for controlling self-optimization within a network |
WO2010065280A2 (en) | 2008-12-03 | 2010-06-10 | Motorola, Inc. | Method for efficient reporting of channel quality information from user equipment to the network |
US9247532B2 (en) | 2009-01-02 | 2016-01-26 | Lg Electronics Inc. | Effective method for transmitting control information during the combination of multiple carriers for wideband support |
KR101640624B1 (en) * | 2009-01-30 | 2016-07-19 | 삼성전자주식회사 | Method and apparatus of control signaling for transmissions over continuous and non-contiguous frequency bands |
US8218553B2 (en) | 2009-02-25 | 2012-07-10 | Juniper Networks, Inc. | Load balancing network traffic on a label switched path using resource reservation protocol with traffic engineering |
US8762511B2 (en) * | 2009-03-06 | 2014-06-24 | Telefonaktiebolaget Lm Ericsson (Publ) | Managing network elements |
US8489108B2 (en) * | 2009-03-10 | 2013-07-16 | Verizon Patent And Licensing Inc. | Method and system for load-balancing across multiple access networks |
US9001745B2 (en) * | 2009-03-13 | 2015-04-07 | Blackberry Limited | HARQ process number management for downlink carrier |
WO2010123304A2 (en) * | 2009-04-24 | 2010-10-28 | Samsung Electronics Co., Ltd. | Multiplexing large payloads of control information from user equipments |
KR101472572B1 (en) | 2009-04-28 | 2014-12-17 | 한국전자통신연구원 | Device, method for managing carrier of base station, terminal and method for managing carrier thereof |
US8830920B2 (en) * | 2009-06-17 | 2014-09-09 | Qualcomm Incorporated | Resource block reuse for coordinated multi-point transmission |
US8175005B2 (en) * | 2009-07-22 | 2012-05-08 | Cisco Technology, Inc. | Coordinated neighbor discovery of radio access point devices and macro base stations |
EP2288091A1 (en) * | 2009-08-13 | 2011-02-23 | Institut Eurecom G.I.E. | Process for controlling the attachment of one mobile terminal to one particular attachment point belonging to one particular wireless access network technology |
US8300587B2 (en) * | 2009-08-17 | 2012-10-30 | Nokia Corporation | Initialization of reference signal scrambling |
DK2468027T3 (en) * | 2009-08-18 | 2013-10-21 | Ericsson Telefon Ab L M | ENERGY SAVING MECHANISMS IN A HETEROGENTRADIO-COMMUNICATION NETWORK |
CN101998259A (en) | 2009-08-18 | 2011-03-30 | 中兴通讯股份有限公司 | Allocation method, device and system of resources occupie by multicast control channel |
US8280417B2 (en) * | 2009-12-23 | 2012-10-02 | Intel Corporation | Short user messages in system control signaling |
KR20110049622A (en) | 2009-11-04 | 2011-05-12 | 삼성전자주식회사 | Method and apparatus for transmission data in wireless communication network system |
KR101777347B1 (en) | 2009-11-13 | 2017-09-11 | 삼성전자주식회사 | Method and apparatus for adaptive streaming based on segmentation |
EP2506450A4 (en) * | 2009-11-24 | 2012-11-07 | Korea Electronics Telecomm | Methods for transmitting a frame in a multi-user based wireless communication system |
CN102118789B (en) * | 2009-12-31 | 2013-02-27 | 华为技术有限公司 | Traffic offload method, traffic offload function entities and traffic offload system |
WO2011082545A1 (en) | 2010-01-08 | 2011-07-14 | 富士通株式会社 | Method and device for carrier management in carrier aggregation system |
KR101733489B1 (en) * | 2010-01-17 | 2017-05-24 | 엘지전자 주식회사 | Apparatus and method of transmitting control information in wireless communication system |
US8868091B2 (en) * | 2010-01-18 | 2014-10-21 | Qualcomm Incorporated | Methods and apparatus for facilitating inter-cell interference coordination via over the air load indicator and relative narrowband transmit power |
KR101875607B1 (en) | 2010-02-11 | 2018-07-06 | 엘지전자 주식회사 | Method for efficiently transmitting small data of machine type communication in mobile communications system |
FI20100057A0 (en) * | 2010-02-12 | 2010-02-12 | Notava Oy | A method and system for creating a virtual device for redirecting data traffic |
KR101624013B1 (en) * | 2010-02-19 | 2016-05-24 | 텔레폰악티에볼라겟엘엠에릭슨(펍) | Method and arrangement for adaptation in http streamimg |
US9066238B2 (en) * | 2010-02-22 | 2015-06-23 | Spectrum Bridge. Inc. | System and method for spectrum sharing among plural wireless radio networks |
US9516686B2 (en) * | 2010-03-17 | 2016-12-06 | Qualcomm Incorporated | Method and apparatus for establishing and maintaining peer-to-peer (P2P) communication on unlicensed spectrum |
KR101850721B1 (en) | 2010-03-24 | 2018-04-20 | 엘지전자 주식회사 | Method and apparatus for reducing inter-cell interference in radio communication system |
US20130195033A1 (en) | 2010-04-01 | 2013-08-01 | Nokia Corporation | Apparatus and Method for Optimization of Access Stratum Bearer Signaling in Radio Resource Control Connection Establishment |
TWI451279B (en) * | 2010-04-07 | 2014-09-01 | Apple Inc | Content access control for real-time or near real-time streaming |
CN101835029A (en) | 2010-04-21 | 2010-09-15 | 深圳市紫云鑫软件技术有限公司 | Control method, system and client for playing streaming media |
EP2383999A1 (en) * | 2010-04-29 | 2011-11-02 | Irdeto B.V. | Controlling an adaptive streaming of digital content |
CN103338473B (en) * | 2010-04-30 | 2016-04-06 | 华为技术有限公司 | The treatment facility of cell outage |
US9282510B2 (en) | 2010-05-13 | 2016-03-08 | Alcatel Lucent | Dynamic reorganization of cell structures in wireless networks |
CA2800184C (en) | 2010-05-25 | 2019-03-19 | Headwater Partners I Llc | System and method for wireless network offloading |
WO2011160250A1 (en) * | 2010-06-21 | 2011-12-29 | Nokia Siemens Networks Oy | Method and apparatus for reducing interference |
GB201010821D0 (en) * | 2010-06-28 | 2011-03-30 | Nokia Oyj | Mehtod and apparatus for communicating via a gateway |
US9088989B2 (en) * | 2010-07-15 | 2015-07-21 | Rivada Networks, Llc | Methods and systems for managing dynamic spectrum arbitrage based on usage of network resources |
CN102348211B (en) * | 2010-07-28 | 2015-02-04 | 中国移动通信集团公司 | Frequency spectrum detection and frequency allocation system and method |
WO2012015902A1 (en) * | 2010-07-30 | 2012-02-02 | Interdigital Patent Holdings, Inc. | Method and apparatus for managing and processing policy profile restrictions |
CN103053145B (en) | 2010-08-17 | 2016-08-03 | 日本电气株式会社 | The method organizing change problem in MTC |
WO2012037236A2 (en) * | 2010-09-15 | 2012-03-22 | Interdigital Patent Holdings, Inc. | Method and apparatus for dynamic bandwidth provisioning in frequency division duplex systems |
JP4878651B1 (en) * | 2010-09-17 | 2012-02-15 | シャープ株式会社 | Mobile station apparatus, communication system, communication method, and integrated circuit |
CA2808472C (en) * | 2010-09-23 | 2016-10-11 | Research In Motion Limited | System and method for dynamic coordination of radio resources usage in a wireless network environment |
CN101964985B (en) | 2010-09-29 | 2013-11-13 | 中国科学院声学研究所 | Coverage and capacity self-optimization device of self-organization network in LTE/LTE-A and method thereof |
US9014025B2 (en) * | 2010-10-04 | 2015-04-21 | Futurewei Technologies, Inc. | System and method for coordinating different types of base stations in a heterogeneous communications system |
TWI524799B (en) * | 2010-10-12 | 2016-03-01 | 內數位專利控股公司 | Service-based approach to channel selection and network configuration for television white space networks |
CN102457871B (en) | 2010-10-26 | 2014-06-11 | 电信科学技术研究院 | Method and system for saving network resource |
US9191284B2 (en) * | 2010-10-28 | 2015-11-17 | Avvasi Inc. | Methods and apparatus for providing a media stream quality signal |
TWI569654B (en) * | 2010-11-01 | 2017-02-01 | 內數位專利控股公司 | Wireless transmit/receive unit and method implemented in dynamic spectrum management engine |
KR101154336B1 (en) * | 2010-11-04 | 2012-06-13 | 강원대학교산학협력단 | Mobile terminal for performing vertical handover in heterogeneous networks and handover method using the same |
US8593952B2 (en) * | 2010-11-09 | 2013-11-26 | At&T Intellectual Property I, L.P. | Method and apparatus for locating a Wi-Fi hotspot for offloading wireless traffic |
WO2012067555A1 (en) | 2010-11-16 | 2012-05-24 | Telefonaktiebolaget L M Ericsson (Publ) | Method and arrangement for cell outage compensation in a communication network system |
CN102104538B (en) * | 2010-12-08 | 2012-07-25 | 浙江工业大学 | Mapping parameter dynamic adaptive wireless streaming media transmission control method |
KR20120070297A (en) * | 2010-12-21 | 2012-06-29 | 한국전자통신연구원 | System and method for searching femto cell access points |
KR20120071229A (en) | 2010-12-22 | 2012-07-02 | 한국전자통신연구원 | Method for transmitting data for mobile communication systems |
WO2012096532A2 (en) * | 2011-01-14 | 2012-07-19 | 엘지전자 주식회사 | Method and device for setting channel status information measuring resource in a wireless communication system |
CN102625317B (en) * | 2011-01-30 | 2016-09-14 | 中兴通讯股份有限公司 | A kind of radio link configuration method and system |
US9107184B2 (en) * | 2011-02-14 | 2015-08-11 | Alcatel Lucent | Method for reduced-overhead short message transmission |
GB2488532B (en) | 2011-02-18 | 2013-06-05 | Sca Ipla Holdings Inc | Communication units and methods for control change notification in broadcast communication |
US9559820B2 (en) | 2011-02-18 | 2017-01-31 | Qualcomm Incorporated | Feedback reporting based on channel state information reference signal (CSI-RS) groups |
KR101820678B1 (en) * | 2011-02-22 | 2018-01-22 | 삼성전자주식회사 | Apparatus and method for hierarchical rate splitting in hierarchical cell communication system |
US8976657B2 (en) * | 2011-03-08 | 2015-03-10 | Medium Access Systems Private Ltd. | Method and system for data offloading in mobile communications |
US20120254890A1 (en) | 2011-04-01 | 2012-10-04 | Renesas Mobile Corporation | Small Data Transmission For Detached Mobile Devices |
US20140086122A1 (en) * | 2011-04-01 | 2014-03-27 | Maruti Gupta | Techniques to control paging for fixed devices |
SG194059A1 (en) * | 2011-04-01 | 2013-11-29 | Interdigital Patent Holdings | Method and apparatus for controlling connectivity to a network |
EP2696548B1 (en) * | 2011-04-03 | 2020-03-04 | LG Electronics Inc. | Method and apparatus for transmitting/receiving downlink control channel in wireless communication system |
EP2509345A1 (en) | 2011-04-05 | 2012-10-10 | Panasonic Corporation | Improved small data transmissions for machine-type-communication (MTC) devices |
US8750358B2 (en) * | 2011-04-06 | 2014-06-10 | Nec Laboratories America, Inc. | Method for improving multiuser MIMO downlink transmissions |
CN103583040B (en) * | 2011-04-15 | 2017-03-15 | 欧朋软件爱尔兰有限责任公司 | Real-time video detector |
US20120275315A1 (en) * | 2011-04-27 | 2012-11-01 | Motorola Solutions, Inc. | Physical-layer cell identity (pci) conflict detection |
US8516144B2 (en) | 2011-04-29 | 2013-08-20 | Cbs Interactive Inc. | Startup bitrate in adaptive bitrate streaming |
US8289917B1 (en) * | 2011-05-02 | 2012-10-16 | Renesas Mobile Corporation | Method and apparatus for defining resource elements for the provision of channel state information reference signals |
WO2012153994A2 (en) * | 2011-05-10 | 2012-11-15 | 엘지전자 주식회사 | Method for transmitting signal using plurality of antenna ports and transmission end apparatus for same |
EP2721864A4 (en) * | 2011-06-14 | 2014-11-12 | Nokia Corp | Managing resource licenses |
US8611823B2 (en) * | 2011-06-16 | 2013-12-17 | Blackberry Limited | Mobile guided uplink interference management |
US8774811B2 (en) | 2011-06-17 | 2014-07-08 | Mediatek Inc. | Method for selecting optimal radio access technology and communication apparatuses utilizing the same |
KR20140036247A (en) * | 2011-06-29 | 2014-03-25 | 엘지전자 주식회사 | Channel state information transmitting method and user equipment, and channel state information receiving method and base station |
GB2492364B (en) | 2011-06-29 | 2016-03-30 | Fujitsu Ltd | Re-selecting network parameters in a cellular wireless network |
CN103782523B (en) | 2011-07-01 | 2017-08-01 | 英特尔公司 | For Homogeneous Circular array(UCA)Structuring code book |
WO2013004260A1 (en) * | 2011-07-07 | 2013-01-10 | Telefonaktiebolaget L M Ericsson (Publ) | Network-capacity optimized adaptive http streaming |
US8804649B1 (en) * | 2011-07-14 | 2014-08-12 | Airhop Communications, Inc. | Self-optimization in heterogeneous networks |
US8965415B2 (en) | 2011-07-15 | 2015-02-24 | Qualcomm Incorporated | Short packet data service |
US8995385B2 (en) * | 2011-08-05 | 2015-03-31 | Samsung Electronics Co., Ltd. | Apparatus and method for UE-specific demodulation reference signal scrambling |
MY164105A (en) | 2011-08-12 | 2017-11-30 | Interdigital Patent Holdings Inc | Interference measurement in wireless networks |
EP2745604B1 (en) | 2011-08-19 | 2022-04-27 | SCA IPLA Holdings Inc. | Mobile communications system, infrastructure equipment, mobile communications terminal and method to communicate user data within an uplink random access channel |
US9008582B2 (en) * | 2011-08-25 | 2015-04-14 | Qualcomm Incorporated | User equipment enhancements for cooperative multi-point communication |
US10205569B2 (en) * | 2011-08-26 | 2019-02-12 | Lg Electronics Inc. | Method and user equipment for receiving downlink signals, and method and base station for transmitting downlink signals |
US9973877B2 (en) | 2011-09-23 | 2018-05-15 | Htc Corporation | Method of handling small data transmission |
WO2013049769A1 (en) * | 2011-09-30 | 2013-04-04 | Interdigital Patent Holdings, Inc. | Multipoint transmission in wireless communication |
US9686058B2 (en) * | 2011-10-26 | 2017-06-20 | Lg Electronics Inc. | Method and apparatus for controlling inter-cell interference in wireless communication system |
US9461721B2 (en) * | 2011-10-27 | 2016-10-04 | Lg Electronics Inc. | Method for reporting channel state information on a coordinated multi-point transmission and reception aggregation, and apparatus therefor |
US8862176B2 (en) * | 2011-11-04 | 2014-10-14 | Intel Corporation | Techniques for mitigating interference associated with downlink transmissions from a base station |
US9363809B2 (en) * | 2011-11-23 | 2016-06-07 | Lg Electronics Inc. | Method and wireless device for monitoring control channel |
CN103999375B (en) * | 2011-12-16 | 2017-03-08 | Lg电子株式会社 | The method and apparatus carrying out esource impact for the physical channel in multi-cell system |
US20130322261A1 (en) | 2011-12-29 | 2013-12-05 | Shu-Ping Yeh | Cell Association in Multi-Radio Access Technology Networks |
US9635618B2 (en) * | 2012-01-03 | 2017-04-25 | Lg Electronics Inc. | Method for setting downlink transmission power in wireless access system, and apparatus therefor |
US20130182643A1 (en) * | 2012-01-16 | 2013-07-18 | Qualcomm Incorporated | Method and system for transitions of broadcast dash service receptions between unicast and broadcast |
EP2806592B1 (en) * | 2012-01-18 | 2018-11-28 | LG Electronics Inc. | Method and apparatus for enhanced-control channel-based operation in wireless communication system |
US9241327B2 (en) * | 2012-01-23 | 2016-01-19 | Intel Corporation | LTE enhancements for small packet transmissions |
WO2013112189A1 (en) | 2012-01-23 | 2013-08-01 | Intel Corporation | Network assisted user association and offloading techniques for integrated multi-rat heterogeneous networks |
US8953478B2 (en) * | 2012-01-27 | 2015-02-10 | Intel Corporation | Evolved node B and method for coherent coordinated multipoint transmission with per CSI-RS feedback |
CN104081854B (en) * | 2012-01-27 | 2019-02-05 | 交互数字专利控股公司 | Management improves inter-cell interference |
KR102094050B1 (en) * | 2012-01-27 | 2020-03-27 | 인터디지탈 패튼 홀딩스, 인크 | Systems and/or methods for providing epdcch in a multiple carrier based and/or quasi-collated network |
US9179456B2 (en) * | 2012-02-07 | 2015-11-03 | Samsung Electronics Co., Ltd. | Methods and apparatus for downlink control channels transmissions in wireless communications systems |
US8660078B2 (en) | 2012-02-07 | 2014-02-25 | Qualcomm Incorporated | Data radio bearer (DRB) enhancements for small data transmissions apparatus, systems, and methods |
US20130227158A1 (en) * | 2012-02-24 | 2013-08-29 | Stmicroelectronics S.R.L. | Media-quality adaptation mechanisms for dynamic adaptive streaming |
US10064221B2 (en) | 2012-03-14 | 2018-08-28 | Telefonaktiebolaget Lm Ericsson (Publ) | Determining a transition of a terminal between its idle state and its connected state |
US9526091B2 (en) * | 2012-03-16 | 2016-12-20 | Intel Corporation | Method and apparatus for coordination of self-optimization functions in a wireless network |
US9445409B2 (en) * | 2012-03-21 | 2016-09-13 | Mediatek, Inc. | Method for search space configuration of enhanced physical downlink control channel |
WO2013142361A1 (en) * | 2012-03-22 | 2013-09-26 | Interdigital Patent Holdings, Inc. | Method and apparatus for offloading backhaul traffic |
US9497756B2 (en) | 2012-03-25 | 2016-11-15 | Comcast Cable Communications, Llc | Base station radio resource management |
CN104272614B (en) * | 2012-03-28 | 2017-06-23 | Lg电子株式会社 | The method for distributing the resource for downlink control channel in a wireless communication system |
WO2013143564A1 (en) | 2012-03-30 | 2013-10-03 | Telefonaktiebolaget L M Ericsson (Publ) | Technique for data-over-nas signalling |
EP2817995A4 (en) * | 2012-04-11 | 2016-01-20 | Intel Corp | Method and apparatus for managing dynamic sharing of spectrum services |
US9143984B2 (en) | 2012-04-13 | 2015-09-22 | Intel Corporation | Mapping of enhanced physical downlink control channels in a wireless communication network |
US9603124B2 (en) * | 2012-04-24 | 2017-03-21 | Apple Inc. | Methods and apparatus for opportunistic radio resource allocation in multi-carrier communication systems |
US9253778B2 (en) * | 2012-05-04 | 2016-02-02 | Interdigital Patent Holdings, Inc. | Coexistence management service for spectrum sharing |
WO2013168958A1 (en) * | 2012-05-07 | 2013-11-14 | 엘지전자 주식회사 | Method and user device for receiving downlink data, and method and base station for transmitting downlink data |
WO2013176827A1 (en) | 2012-05-19 | 2013-11-28 | Motorola Mobility Llc | Method and apparatus for transport block signaling in a wireless communication system |
WO2013177562A1 (en) * | 2012-05-24 | 2013-11-28 | Hughes Network Systems, Llc | System and method for efficient use of radio resources for push-to-talk services in mobile wireless communications systems |
US8930559B2 (en) * | 2012-06-01 | 2015-01-06 | Verizon Patent And Licensing Inc. | Adaptive hypertext transfer protocol (“HTTP”) media streaming systems and methods |
US20150181568A1 (en) * | 2012-06-05 | 2015-06-25 | Lg Electronics Inc. | Method and apparatus for receiving control information in wireless communication system |
JP2015527774A (en) * | 2012-06-12 | 2015-09-17 | クアルコム,インコーポレイテッド | Dynamic multi-operator selection in multi-SIM user equipment |
US9197685B2 (en) * | 2012-06-28 | 2015-11-24 | Sonic Ip, Inc. | Systems and methods for fast video startup using trick play streams |
US20140019635A1 (en) * | 2012-07-13 | 2014-01-16 | Vid Scale, Inc. | Operation and architecture for dash streaming clients |
EP3447958B1 (en) * | 2012-08-03 | 2020-06-17 | Telefonaktiebolaget LM Ericsson (publ) | Epdcch search space design |
WO2014019235A1 (en) | 2012-08-03 | 2014-02-06 | Nokia Siemens Networks Oy | Data transmission |
US9591513B2 (en) * | 2012-08-06 | 2017-03-07 | Vid Scale, Inc. | Rate adaptation using network signaling |
US20140040496A1 (en) * | 2012-08-06 | 2014-02-06 | General Instrument Corporation | On-demand http stream generation |
WO2014025172A1 (en) * | 2012-08-10 | 2014-02-13 | 엘지전자 주식회사 | Method and apparatus for receiving control information in wireless communication system |
TWI623205B (en) * | 2012-09-27 | 2018-05-01 | 內數位專利控股公司 | End-to-end architecture, api framework, discovery, and access in a virtualized network |
CN104704750B (en) * | 2012-10-04 | 2018-01-05 | Lg电子株式会社 | The method and apparatus for receiving and dispatching down link signal by considering antenna port relation in a wireless communication system |
US20140101312A1 (en) * | 2012-10-09 | 2014-04-10 | Transpacific Ip Management Group Ltd. | Access allocation in heterogeneous networks |
US20140297869A1 (en) * | 2012-10-11 | 2014-10-02 | Uplynk, LLC | Adaptive streaming cost management |
US9553709B2 (en) * | 2012-10-16 | 2017-01-24 | Alcatel Lucent | Method and apparatus for wireless communication using a short-range base station with multiple radio interfaces of different technologies |
US10111049B2 (en) | 2012-10-26 | 2018-10-23 | Qualcomm Incorporated | Multiband eMBMS enhancement using carrier aggregation |
CN104885545A (en) * | 2012-11-15 | 2015-09-02 | 交互数字专利控股公司 | Channel evacuation procedures for wireless networks deployed in dynamic shared spectrum |
US9119157B2 (en) * | 2012-11-30 | 2015-08-25 | Qualcomm Incorporated | Power saving modes in wireless devices |
US20140160937A1 (en) * | 2012-12-06 | 2014-06-12 | Telefonaktiebolaget L M Ericsson (Publ) | Common radio resource control for cellular radio and wifi |
US9609575B2 (en) * | 2012-12-31 | 2017-03-28 | T-Mobile Usa, Inc. | Intelligent routing of network packets on telecommunication devices |
KR101825575B1 (en) * | 2013-01-07 | 2018-02-05 | 노키아 테크놀로지스 오와이 | Method and apparatus for video coding and decoding |
TW201446021A (en) * | 2013-01-28 | 2014-12-01 | Interdigital Patent Holdings | Methods and apparatus for spectrum coordination |
US9986577B2 (en) * | 2013-02-19 | 2018-05-29 | Vanu, Inc. | Spectrum access system |
US9049588B2 (en) | 2013-02-28 | 2015-06-02 | Blackberry Limited | Communicating data in a predefined transmission mode |
EP2962485B1 (en) | 2013-03-01 | 2019-08-21 | Intel IP Corporation | Wireless local area network (wlan) traffic offloading |
US9392577B2 (en) | 2013-03-01 | 2016-07-12 | Qualcomm Incorporated | Small cell evolved multimedia broadcast multicast service |
US20140357218A1 (en) * | 2013-05-31 | 2014-12-04 | Nokia Siemens Networks Oy | Method and apparatus for moderated access to shared radio spectrum resources |
US9819471B2 (en) * | 2013-11-04 | 2017-11-14 | Texas Instruments Incorporated | Method and apparatus for configuration, measurement and reporting of channel state information for LTE TDD with dynamic UL/DL configuration |
-
2013
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- 2013-11-07 WO PCT/US2013/068863 patent/WO2014133603A1/en active Application Filing
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- 2013-12-13 WO PCT/US2013/075139 patent/WO2014133642A1/en active Application Filing
- 2013-12-13 CN CN201711474990.2A patent/CN108322914B/en active Active
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Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20130250868A1 (en) * | 2011-09-18 | 2013-09-26 | Nec Laboratories America, Inc. | User Pairing and Resource Allocation for Downlink Multiuser Multi-Input-Multi-Output In Long Term Evolution Advanced Systems |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20130265980A1 (en) * | 2011-09-29 | 2013-10-10 | Yuan Zhu | Higher order mu-mimo for lte-a |
US9807617B2 (en) * | 2011-09-29 | 2017-10-31 | Intel Corporation | Higher order MU-MIMO for LTE-A |
US9258044B2 (en) * | 2013-03-08 | 2016-02-09 | Huawei Technologies Co., Ltd. | Method for feeding back precoding matrix indicator, receive end and transmit end |
US20170222699A1 (en) * | 2014-03-14 | 2017-08-03 | Telefonaktiebolaget Lm Ericsson (Publ) | Technique for Precoder Determination |
US10320454B2 (en) * | 2014-03-14 | 2019-06-11 | Telefonaktiebolaget Lm Ericsson (Publ) | Technique for precoder determination |
US20180254814A1 (en) * | 2015-09-14 | 2018-09-06 | Lg Electronics Inc. | Method for transmitting and receiving channel state information (csi) in wireless communication system, and apparatus therefor |
US10516459B2 (en) * | 2015-09-14 | 2019-12-24 | Lg Electronics Inc. | Method for transmitting and receiving channel state information (CSI) in wireless communication system, and apparatus therefor |
US11063642B2 (en) | 2019-09-11 | 2021-07-13 | Samsung Electronics Co., Ltd. | Apparatus and method for precoding data in wireless communication system |
CN112543045A (en) * | 2019-09-23 | 2021-03-23 | 深圳市中兴微电子技术有限公司 | Method and device for acquiring PMI |
GB2588930A (en) * | 2019-11-14 | 2021-05-19 | British Broadcasting Corp | Multimedia system & method |
WO2022236614A1 (en) * | 2021-05-10 | 2022-11-17 | Lenovo (Beijing) Limited | Method and apparatus for avoiding repeated state transition in small data transmission |
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