WO2015154437A1 - Procédé et terminal de prise en charge d'agrégation de porteuses - Google Patents

Procédé et terminal de prise en charge d'agrégation de porteuses Download PDF

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Publication number
WO2015154437A1
WO2015154437A1 PCT/CN2014/089508 CN2014089508W WO2015154437A1 WO 2015154437 A1 WO2015154437 A1 WO 2015154437A1 CN 2014089508 W CN2014089508 W CN 2014089508W WO 2015154437 A1 WO2015154437 A1 WO 2015154437A1
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Prior art keywords
antenna switch
output
terminal
antenna
input end
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PCT/CN2014/089508
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English (en)
Chinese (zh)
Inventor
牛慧
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中兴通讯股份有限公司
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Publication of WO2015154437A1 publication Critical patent/WO2015154437A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices

Definitions

  • the present invention relates to the field of communications, and in particular, to a method and a terminal for supporting carrier aggregation.
  • CA Carrier Aggregation
  • the CA aggregates multiple consecutive or non-contiguous carriers to form a carrier with a larger bandwidth (for example, the currently supported maximum aggregate bandwidth is 100 MHz) to meet the throughput of User Equipment (UE). Peak rate requirements.
  • UE User Equipment
  • FIG. 1 is a schematic diagram of a conventional RF transmission/reception link that does not support the CA scheme, and includes a baseband integrated circuit (BBIC), a radio frequency integrated circuit (RFICs), and a radio frequency front end. Device and an antenna;
  • BBIC baseband integrated circuit
  • RFICs radio frequency integrated circuit
  • the baseband processing chip is used to synthesize the baseband signal to be transmitted or to decode the baseband signal received from the radio frequency module; at the same time, it is also responsible for controlling and managing the entire terminal, including Timing control, digital system control, man-machine interface management and control, and RF device control.
  • the radio frequency chip module is configured to transmit to the base station by using multiple component carriers, and receive the wireless signal from the base station; that is, mainly complete modulation of the transmitted digital baseband signal to meet the required radio frequency index for transmission in space; Demodulating the spatially received RF signal to convert it into a digital baseband signal is performed by the baseband chip module to perform related data operations.
  • the RF front-end device mainly includes a power amplifier (Power Amplifier, abbreviated as PA), a duplexer (Duplexer), and an antenna switch (Switch), which completes amplification and filtering of the transmitted signal, and is transmitted by the antenna after being switched by the antenna; Filtering the signal received by the antenna and then entering the RF chip module for demodulation.
  • PA Power Amplifier
  • Duplexer duplexer
  • Switch antenna switch
  • the antenna switch and the antenna are connected via a matching network (Matching Network, MN for short) and an antenna feed point (Antenna Feed Point, FP for short).
  • MN Matching Network
  • FP Antenna Feed Point
  • the radio frequency chip modules modulate the baseband signal output by the baseband processing chip (BBIC) onto the high frequency carrier signal, and output a lower power radio frequency signal to the power amplifier PA for RF signal amplification.
  • the output power of the terminal meets the requirements of the 3GPP or the operator.
  • the high-power RF signal output by the PA is sent to the antenna through the antenna switch (Switch), radiated to the free space, and wirelessly communicates with the base station system.
  • the antenna transmits the downlink signal transmitted by the base station antenna to the duplexer after passing through the antenna switch, and then reaches the receiving end of the RF transceiver chip through the receiving link, and performs down-conversion and demodulation inside the RF chip. It becomes a baseband signal and is transmitted to the baseband chip for information processing.
  • FIG. 2 is a schematic diagram of the principle of the current RF transmit/receive link supporting CA.
  • the intermediate frequency/high frequency and low frequency transmit signals are transmitted from the two ports (M/HB, LB) after the main switch.
  • the output is passed through an antenna splitter (Diplexer) added after the main switch, and signals of different frequencies are transmitted through the antenna. For signal reception, and vice versa.
  • Diplexer antenna splitter
  • the path loss of the wireless link increases.
  • the main RF framework of the system supporting CA is compared with the RF part of the system that does not support CA.
  • a duplexer (Diplexer) is added after the transmission/reception of each frequency band.
  • the Diplexer itself generates Path Loss; especially at high frequencies, this path loss is still relatively large.
  • the increase in the path loss of the radio link affects the uplink transmit power of the UE and the downlink receive sensitivity of the UE.
  • the transmit power of the UE directly affects important indicators such as the performance of the cell edge and the spectrum efficiency of the system; in the downlink of the wireless communication system, the receiving sensitivity of the UE directly affects the user experience and Customer service quality.
  • the existing RF architecture is achievable because its RF signal is still in one frequency band, but its bandwidth is wider than the existing widest bandwidth (20MHz), and the spectrum of its signal may be Discontinuous, this will result in increased out-of-band spurs.
  • duplex with higher isolation is required; for the TDD system, a filter with higher out-of-band rejection is required.
  • the emission (low frequency) harmonics will cause interference to the downstream (high frequency) of the aggregation.
  • the broadband antenna has poor suppression when the low-frequency transmission is out of band, and the antenna cannot provide better when the harmonic falls within the middle frequency band. Degree of inhibition.
  • the embodiments of the present invention provide a method and a terminal for supporting carrier aggregation, which can save the Dieter on the radio link, which can significantly reduce the path loss of the radio link and improve the radio frequency performance of the terminal.
  • an embodiment of the present invention provides a terminal supporting carrier aggregation, including a radio frequency front end device, where the radio frequency front end device includes an antenna switch, and further includes a multi-band antenna component, the multi-band antenna The component supports N working frequency bands, and the multi-band antenna assembly includes: a radiator, N feed points, and N matching networks; wherein:
  • the radiator is electrically connected to the N feeding points, and each of the N feeding points is electrically connected to an output end of the antenna switch through a matching network, the antenna switch includes N outputs, N is an integer greater than or equal to 2.
  • the terminal supports M frequency bands
  • the antenna switch includes M input ends, and one or more input ends correspond to one output end;
  • the N output ends of the antenna switch are connected to the M input terminals in a switching selection or direct connection, and M is greater than or equal to N.
  • the multi-band antenna component supports two working frequency bands, including two feeding points electrically connected to the radiator and two matching networks respectively connected to the two feeding points, and the two matching networks respectively Connected to the first output and the second output of the antenna switch.
  • the terminal supports three frequency bands of a low frequency, an intermediate frequency, and a high frequency
  • the antenna switch includes a low frequency input end, an intermediate frequency input end, and a high frequency input end;
  • the first output end of the antenna switch is connected to the high frequency input end or the intermediate frequency input end in a switching selection manner, and the second output end of the antenna switch is in communication with the low frequency input end.
  • the multi-band antenna component supports three working frequency bands, including three feeding points electrically connected to the radiator and three matching networks respectively connected to the three feeding points, and the three matching networks respectively Connected to the first output, the second output, and the third output of the antenna switch.
  • the terminal supports three frequency bands of a low frequency, an intermediate frequency, and a high frequency
  • the antenna switch includes a low frequency input end, an intermediate frequency input end, and a high frequency input end;
  • the first output end of the antenna switch is in communication with the high frequency input end
  • the second output end of the antenna switch is in communication with the intermediate frequency input end
  • the third output end of the antenna switch is The low frequency input is connected.
  • the embodiment of the present invention further provides a method for supporting carrier aggregation, including:
  • the multi-band antenna component supporting N working frequency bands, including: a radiator, N feed points, and N matching networks, where N is an integer greater than or equal to 2;
  • the antenna Switch includes N outputs.
  • the terminal supports M frequency bands
  • the antenna switch includes M input ends; and one or more input ends correspond to one output end;
  • the method further includes: when the terminal is in operation, connecting the N output ends of the antenna switch to the M input ends in a switching selection or direct connection, where M is greater than or equal to N.
  • the multi-band antenna component supports two working frequency bands
  • the antenna switch includes: a first output end and a second output end;
  • the electrically connecting the radiator to the N feed points, and electrically connecting each of the N feed points to an output of the antenna switch through a matching network including :
  • the radiator is electrically connected to two feeding points, and two matching networks respectively connected to the two feeding points are respectively connected to the first output end and the second output end of the antenna switch.
  • the terminal supports three frequency bands of a low frequency, an intermediate frequency, and a high frequency
  • the antenna switch includes a low frequency input end, an intermediate frequency input end, and a high frequency input end;
  • the method further includes: when the terminal is in operation, connecting the first output end of the antenna switch to the high frequency input end or the intermediate frequency input end in a switching selection manner, and the second output end of the antenna switch is The low frequency input is connected.
  • the multi-band antenna component supports three working frequency bands
  • the antenna switch includes: a first output end, a second output end, and a third output end;
  • the electrically connecting the radiator to the N feed points, and electrically connecting each of the N feed points to an output of the antenna switch through a matching network including :
  • the radiator is electrically connected to three feeding points, and three matching networks respectively connected to the three feeding points are respectively connected to the first output end, the second output end and the third output end of the antenna switch ;
  • the terminal supports three frequency bands of a low frequency, an intermediate frequency, and a high frequency
  • the antenna switch includes a low frequency input end, an intermediate frequency input end, and a high frequency input end;
  • the method further includes: when the terminal is in operation, connecting the first output end of the antenna switch to the high frequency input end, and connecting the second output end of the antenna switch to the intermediate frequency input end, A third output of the antenna switch is in communication with the low frequency input.
  • the method and terminal for supporting carrier aggregation can save the Dieter on the radio link by using a multi-band antenna, which can significantly reduce the path loss of the radio link and improve the radio frequency performance of the terminal.
  • a multi-band antenna with a finer band division is selected correspondingly, and the operating frequency range (band width) of each of the multi-band antennas is subdivided so that each individual operating band width Narrowing, which can increase the efficiency of each frequency band only within its own operating frequency range, and reduce efficiency outside its own operating frequency range, thereby reducing interference to other bands outside the band, reducing interference that may be caused by carrier aggregation, and thus improving The quality of the communication system.
  • FIG. 1 is a schematic diagram of a conventional RF transmitting/receiving link that does not support a CA scheme
  • FIG. 2 is a schematic diagram of a principle of a radio frequency transmitting/receiving link supporting a CA by a related art
  • FIG. 3 is a schematic structural diagram of a terminal supporting a CA in this embodiment
  • FIG. 4 is a schematic structural diagram of a terminal supporting a preferred application example of CA
  • FIG. 5 is a schematic structural diagram of a terminal supporting another preferred application example of CA
  • FIG. 6 is a flow chart of a method of supporting CA in an embodiment.
  • the terminal supporting carrier aggregation utilizes the design of the multi-band antenna, replaces the Triplexer in the terminal, and implements the function of the Diplexer by using the multi-matching network and the multi-feed point.
  • the embodiment provides a terminal for supporting carrier aggregation, which includes: a baseband processing chip BBIC, a radio frequency chip module RFICs, and a radio frequency front end device as shown in FIG. a band antenna assembly, the multi-band antenna assembly supporting N operating bands, the multi-band antenna
  • the components include: a radiator, N feed points, and N matching networks;
  • the radiator is electrically connected to the N feeding points, and each of the N feeding points is electrically connected to an output end of the antenna switch through a matching network, the antenna switch includes N outputs, N is an integer greater than or equal to 2.
  • the terminal supports M frequency bands, and the antenna switch includes M input ends; one or more input ends correspond to one output end;
  • the terminal refers specifically to the components connected to the input end of the antenna switch, for example, the baseband processing chip BBIC and the RF chip module RFICs. Since the BBIC and the RFICs support M frequency bands, the signals processed by the BBIC and the RFICs (with M frequency bands) are processed. Input from the input terminals of the M corresponding frequency bands of the antenna switch.
  • the baseband processing chip BBIC and the RF chip module RFICs Since the BBIC and the RFICs support M frequency bands, the signals processed by the BBIC and the RFICs (with M frequency bands) are processed. Input from the input terminals of the M corresponding frequency bands of the antenna switch.
  • the N output ends of the antenna switch are connected to the M input terminals in a switching selection or direct connection, and M is greater than or equal to N.
  • the communication in the manner of switching selection means that any one of the M input terminals can be connected according to the selection of the frequency band and any one of the N output terminals.
  • the frequency band supported by the terminal is divided into high frequency (HB), intermediate frequency (MB) and low frequency (LB) according to the radio wave frequency;
  • the antenna switch has two outputs, and the high frequency and the intermediate frequency can be used as one output end (M/ HB), the low frequency is used as an output (LB); or, the antenna switch has 3 outputs, the antenna switch can use the high frequency as an output (HB), the intermediate frequency as an output (MB), and the low frequency as An output (LB).
  • the frequency band outputted by the switch output terminal can be further divided, for example, the low frequency band is 698 to 960 MHz, the middle frequency band is 1710 to 2170 MHz, and the high frequency band is 2300 to 2690 MHz.
  • the switch output can also output more frequency bands. For example, it can also output 4 signals, 5 different frequency signals, and so on.
  • the working frequency band of the multi-band antenna component corresponds to an operating frequency band of the antenna switch output signal. That is to say, in this embodiment, the antenna switch has several output ends (ie, corresponding to several working frequency bands), and correspondingly, the multi-band antenna corresponding to the number of output bands of the antenna switch is selected.
  • the multi-band antenna assembly supports two working frequency bands, including two feeding points electrically connected to the radiator and two matching networks respectively connected to the two feeding points, and the two matching networks. Matching networks are respectively connected to the first output and the second output of the antenna switch.
  • the terminal supports three frequency bands of low frequency, intermediate frequency and high frequency, and the antenna switch comprises a low frequency input end, an intermediate frequency input end and a high frequency input end;
  • the first output end of the antenna switch is connected to the high frequency input end or the intermediate frequency input end in a switching selection manner, and the second output end of the antenna switch is in communication with the low frequency input end.
  • the multi-band antenna assembly supports three working frequency bands, including three feeding points electrically connected to the radiator and three matching networks respectively connected to the three feeding points, and the three matching networks.
  • the matching networks are respectively connected to the first output, the second output and the third output of the antenna switch.
  • the terminal supports three frequency bands of low frequency, intermediate frequency and high frequency, and the antenna switch comprises a low frequency input end, an intermediate frequency input end and a high frequency input end;
  • the first output end of the antenna switch is in communication with the high frequency input end
  • the second output end of the antenna switch is in communication with the intermediate frequency input end
  • the third output end of the antenna switch is The low frequency input is connected.
  • the antenna switch selects which output terminal the carrier signal is output from, so as to determine the corresponding antenna feeding point; the corresponding radiator of the multi-band antenna connected to the feeding point and the multi-band antenna connected thereto radiates the signal,
  • the radiated signal operates on the corresponding frequency band of the multi-band antenna.
  • the multi-band antenna utilizes the parasitic strip 1 to cooperate with the radiating branch 1 to extend the bandwidth of the multi-band antenna to receive the low-band signal to enhance its ability to receive low-band signals; the parasitic strip 2 is coupled to the radiating branch 2, Extending the bandwidth of the multi-band antenna to receive the mid-band signal to enhance its ability to receive the mid-band signal; and the multi-band antenna cooperates with the radiating branch 3 using the parasitic strip 3 to extend the multi-band antenna to receive the high-band signal Bandwidth to enhance its ability to receive high frequency band signals. Therefore, the multi-band antenna has a wider receiving range and a stronger receiving capability.
  • the design of the multi-band antenna radiator is prior art and will not be described further herein.
  • a multi-band antenna can have characteristics of multiple operating frequency bands, and multiple feeders are designed. Point, different signals are transmitted/received from different feed points, directly corresponding to different ports of the antenna switch. That is, in the carrier aggregation system, the function implemented by the Diplexer on the radio frequency link is completed by the multi-band antenna component, thereby eliminating the Diplexer, reducing the path loss of the radio link, and improving the radio frequency performance of the terminal.
  • 4 and 5 are schematic diagrams of terminal structures of two preferred application examples supporting CA.
  • the antenna switch has two outputs, a high/intermediate frequency (M/HB) output and a low frequency (LB) output, using a multi-band antenna supporting two frequency bands, two The matching network and two feed points are used to support the IF/HF and LF, respectively.
  • M/HB high/intermediate frequency
  • LB low frequency
  • the Diplexer in the current terminal CA scheme can be omitted, the radio link path loss can be reduced, and the radio frequency performance of the terminal can be improved;
  • the multi-band antenna since the multi-band antenna is used, the operating frequency range of each frequency band is narrow, so The degree of suppression outside the bandwidth is increased, thereby reducing interference that may occur between different frequency bands during carrier aggregation.
  • the antenna switch has three output terminals, a high frequency (HB) output terminal, an intermediate frequency (MB) output terminal, and a low frequency (LB) output terminal.
  • HB high frequency
  • MB intermediate frequency
  • LB low frequency
  • the design of the multi-band antenna band is further refined, and three bands are used to support the high frequency, the intermediate frequency, and the low frequency, respectively.
  • the transmission signals of each carrier are output from different ports through the antenna switch, and then sent to different antenna feeding points, radiated to the free space via the antenna, and wirelessly communicate with the base station system; and the received signals are different. After receiving the different ports of the antenna switch, the antenna feed point is sent to the receiving link.
  • the antenna performance can be optimized to make the operating frequency range of each frequency band narrower.
  • the interference outside the bandwidth is smaller, thereby optimizing the reduction of interference between different frequency bands during carrier aggregation.
  • this embodiment provides a method for supporting carrier aggregation, including the following steps:
  • the antenna switch includes N outputs.
  • the terminal supports M frequency bands, and the antenna switch includes M input ends; one or more input ends correspond to one output end; the terminal here refers specifically to a component connected to the antenna switch input end, for example, a baseband Processing chip BBIC and RF chip module RFICs;
  • the method further includes: when the terminal is in operation, connecting the N output ends of the antenna switch to the M input ends in a switching selection or direct connection, where M is greater than or equal to N.
  • the multi-band antenna assembly supports two working frequency bands
  • the antenna switch includes: a first output end and a second output end;
  • the electrically connecting the radiator to the N feed points, and electrically connecting each of the N feed points to an output of the antenna switch through a matching network including :
  • the radiator is electrically connected to two feeding points, and two matching networks respectively connected to the two feeding points are respectively connected to the first output end and the second output end of the antenna switch.
  • the terminal supports three frequency bands of low frequency, intermediate frequency and high frequency, and the antenna switch comprises a low frequency input end, an intermediate frequency input end and a high frequency input end;
  • the method further includes: when the terminal is in operation, connecting the first output end of the antenna switch to the high frequency input end or the intermediate frequency input end in a switching selection manner, and the second output end of the antenna switch is The low frequency input is connected.
  • the multi-band antenna assembly supports three working frequency bands
  • the antenna switch includes: a first output end, a second output end, and a third output end;
  • the electrically connecting the radiator to the N feed points, and electrically connecting each of the N feed points to an output of the antenna switch through a matching network including :
  • the radiator is electrically connected to three feeding points, and three matching networks respectively connected to the three feeding points are respectively connected to the first output end, the second output end and the third output end of the antenna switch ;
  • the terminal supports three frequency bands of low frequency, intermediate frequency and high frequency, and the antenna switch comprises a low frequency input end, an intermediate frequency input end and a high frequency input end;
  • the method further includes: when the terminal is in operation, connecting the first output end of the antenna switch to the high frequency input end, and connecting the second output end of the antenna switch to the intermediate frequency input end, A third output of the antenna switch is in communication with the low frequency input.
  • the method and terminal for supporting carrier aggregation provided in the foregoing embodiments can eliminate the Triplexer on the radio frequency link by using a multi-band antenna, which can significantly reduce the path loss of the radio link.
  • a multi-band antenna which can significantly reduce the path loss of the radio link.
  • the frequency band of the antenna switch output is divided into multiple, correspondingly select a multi-band antenna with a finer band division, and the operating frequency range (band width) of each of the multi-band antennas is subdivided.
  • the efficiency of each frequency band can be improved only within the range of its own operating frequency range, and the efficiency is reduced outside the range of its own operating frequency, thereby reducing interference to other bands outside the band and reducing carrier aggregation. Interference that may be caused, thereby improving the quality of the communication system.
  • the method and terminal for supporting carrier aggregation can save the Dieter on the radio link by using a multi-band antenna, which can significantly reduce the path loss of the radio link and improve the radio frequency performance of the terminal.
  • a multi-band antenna with a finer band division is selected correspondingly, and the operating frequency range (band width) of each of the multi-band antennas is subdivided so that each individual operating band width Narrowing, which can increase the efficiency of each frequency band only within its own operating frequency range, and reduce efficiency outside its own operating frequency range, thereby reducing interference to other bands outside the band, reducing interference that may be caused by carrier aggregation, and thus improving The quality of the communication system.

Abstract

L'invention concerne un procédé et un terminal de prise en charge d'agrégation de porteuses. Le terminal comprend un dispositif frontal radiofréquence comprenant un commutateur d'antennes, et comprend également un ensemble d'antennes multibandes prenant en charge un nombre N de bandes de travail et comprenant un corps rayonnant, un nombre N de points d'alimentation et un nombre N de réseaux d'adaptation; le corps rayonnant étant connecté électriquement aux N points d'alimentation, chacun des N points d'alimentation étant connecté électriquement à une extrémité de sortie du commutateur d'antennes par le biais d'un réseau d'adaptation, le commutateur d'antennes comprenant un nombre N d'extrémités de sortie, et N étant un nombre entier supérieur ou égal à 2.
PCT/CN2014/089508 2014-08-15 2014-10-24 Procédé et terminal de prise en charge d'agrégation de porteuses WO2015154437A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201410405132.2A CN105376872A (zh) 2014-08-15 2014-08-15 一种支持载波聚合的方法及终端
CN201410405132.2 2014-08-15

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