WO2016033956A1 - Procédé et dispositif de configuration de type de préfixe cyclique - Google Patents

Procédé et dispositif de configuration de type de préfixe cyclique Download PDF

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Publication number
WO2016033956A1
WO2016033956A1 PCT/CN2015/074631 CN2015074631W WO2016033956A1 WO 2016033956 A1 WO2016033956 A1 WO 2016033956A1 CN 2015074631 W CN2015074631 W CN 2015074631W WO 2016033956 A1 WO2016033956 A1 WO 2016033956A1
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type
cyclic prefix
uplink
terminal
subframe
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PCT/CN2015/074631
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English (en)
Chinese (zh)
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夏树强
石靖
戴博
吴栓栓
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中兴通讯股份有限公司
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Publication of WO2016033956A1 publication Critical patent/WO2016033956A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes

Definitions

  • the present invention relates to the field of communications, and in particular, to a method and apparatus for configuring a Cyclic Prefix (CP) type.
  • CP Cyclic Prefix
  • LTE Long-Term Evolution
  • LTE-Advance Long-Term Evolution Advance
  • LTE-A Long-Term Evolution Advance
  • FIG. 1 is a schematic diagram of a frame structure and a cyclic prefix of an LTE/LTE-A system according to the related art.
  • an LTE/LTE-A system uses a 10 ms radio frame in a time domain, and each radio frame is divided into 10 1ms subframe of the same length.
  • Each subframe is composed of 2 slots, each slot having a length of 0.5 ms.
  • Each time slot is composed of a certain number of Orthogonal Frequency Division Multiplexing (OFDM) symbols including a Cyclic Prefix (CP).
  • OFDM Orthogonal Frequency Division Multiplexing
  • a useful symbol length of the LTE/LTE-A system when using a subcarrier spacing of 15 kHz is about 66.7 us, and the total symbol time of OFDM is the sum of the useful symbol time and the cyclic prefix length.
  • the LTE/LTE-A protocol defines two cyclic prefix lengths, a regular cyclic prefix and an extended cyclic prefix, respectively, with 7 and 6 OFDM symbols per slot. Where the regular cyclic prefix, the cyclic prefix of the first OFDM symbol in the slot is slightly larger than the remaining OFDM symbols, the reason for this is simply to fill the entire 0.5 ms slot.
  • the LTE/LTE-A protocol defines two cyclic prefix lengths.
  • One is that although the use of longer cyclic prefixes is less efficient from an overhead perspective, it may be advantageous for certain environments with extended propagation delays, such as larger cells.
  • the cyclic prefix not only covers the main part of the actual channel time dispersion, but also covers the participation of MBSFN transmission. The time difference between cells, so the extended cyclic prefix is used in the case of MBSFN operation.
  • the cyclic prefix of the LTE downlink can be dynamically changed in each radio frame, but the uplink (UpLink, abbreviated as UL) cyclic prefix length type is not dynamically changed in each radio frame. Because the dynamic change will cause the downlink control overhead to increase.
  • the current uplink CP length is configurable, and the frequency domain resources can also be multiplexed with the legacy legacy UE.
  • the uplink resource utilization rate is degraded. Therefore, in order to solve the use of uplink resources by UEs with different requirements, it is necessary to further improve uplink resource utilization.
  • the embodiment of the invention provides a method and a device for configuring a cyclic prefix type to solve at least the problem of low uplink resource utilization in the related art.
  • a method for configuring a cyclic prefix type including: sending, by a base station, configuration information that is set to indicate an uplink cyclic prefix type to different terminals; wherein the uplink cyclic prefix type is at least according to a time domain length Dividing into a type 1 uplink cyclic prefix and a type 2 uplink cyclic prefix; the different terminals include: at least two types of terminals, and/or terminals of at least two types of services; and, for one type of terminal or service
  • the configured subframe 1//or type 2 uplink cyclic prefix subframe/radio frame set is a subset of the subframe/radio frame set of the same type of uplink cyclic prefix configured for another type of terminal or service.
  • the sending, by the base station, the configuration information that is set to indicate the uplink cyclic prefix type to the different terminals includes: the base station sending the configuration information by using physical layer signaling or high layer signaling, where the physical layer signaling includes a dedicated The downlink control indication format, and/or the reserved bits in the existing downlink control indication format.
  • the configuration information included in the physical layer signaling or the high layer signaling includes the subframe/radio frame set, and a cyclic prefix type corresponding to the subframe/radio frame set.
  • the minimum unit configured by the base station to configure an uplink cyclic prefix type for the different terminal includes one of: a subframe, one or more radio frames; and/or, the base station is configured according to a preset period.
  • the upstream cyclic prefix type is configured for different terminals.
  • the terminal or service of the type is used as the terminal or service of the type 2, and the terminal or service of the other type is used as the terminal or service of the type 1, and the base station passes the configuration information.
  • the cyclic prefix type of the type 1 terminal or the uplink partial subframe or the radio frame or the set 1 of the multiple radio frames is configured as the type 1 or type 2 uplink cyclic prefix, and the remaining subframes or wireless
  • the cyclic prefix type of the second set of frames or multiple radio frames is correspondingly configured as another type of uplink cyclic prefix.
  • the base station configures, by using the configuration information, a cyclic prefix type of a partial subframe or a radio frame or a set of three radio frames in the terminal of the type 2 or the service, and the Collecting an uplink cyclic prefix of the same type, wherein the set three is a subset of the set one; and/or, the base station, by using the configuration information, the uplink part of the terminal of the type 2 or the service
  • a cyclic prefix type of a frame or a radio frame or a set of four radio frames is configured to be the same type of uplink cyclic prefix as the set two, wherein the set four is a subset of the set two.
  • the base station receives an SRS signal that is sent by the different terminal and the terminal that does not support the cyclic prefix type configuration method in different subframes in the same subframe.
  • the base station indicates a corresponding subframe or a radio frame or multiple radio frame collections in the different terminals by using a subframe or a radio frame or a location of multiple radio frame sets corresponding to different uplink cyclic prefix types.
  • the duration length C1 of one of the type 1 or type 2 uplink cyclic prefixes is smaller than the duration length C2 of the other type of uplink cyclic prefix.
  • the method further includes: the base station receiving, according to the configuration information, an uplink signal sent by the different terminal.
  • a method for configuring a cyclic prefix type including: receiving, by a terminal, configuration information that is set to indicate an uplink cyclic prefix type; wherein the uplink cyclic prefix type is at least divided according to a time domain length Type 1 uplink cyclic prefix and type 2 uplink cyclic prefix; a subframe/radio frame set of type 1 and/or type 2 uplink cyclic prefix configured for one terminal or service of one of different types of terminals or services, is another A subset of the subframe/radio frame set of the same type of uplink cyclic prefix of the type of terminal or service configuration.
  • the configuration information is obtained by receiving physical layer signaling or high layer signaling, where the physical layer signaling includes a dedicated downlink control indication format, and/or an existing downlink control indication format. Reserved bits.
  • the minimum unit including the uplink cyclic prefix type in the configuration information includes one of the following: a subframe, one or more radio frames; and/or, the configuration information is configured by configuring the uplink cyclic prefix in a preset period. Types of.
  • the terminal or the service of the one type is the terminal or the service of the type 2
  • the terminal or the service of the other type is the terminal or service of the type 1
  • the type is according to the configuration information.
  • a cyclic prefix type of a partial subframe or a radio frame or a set of multiple radio frames in a terminal or service is configured
  • the cyclic prefix type of the remaining subframe or the radio frame or the set 2 of the plurality of radio frames is configured as another type of uplink cyclic prefix.
  • the cyclic prefix type of the uplink type partial subframe or the radio frame or the set three of the plurality of radio frames in the terminal of the type 2 or the service is configured to be the same as the set one.
  • the cyclic prefix type of the set four of the radio frames is configured as the same type of uplink cyclic prefix as the set two, wherein the set four is a subset of the set two.
  • the terminal of the different terminal and the configuration method that does not support the cyclic prefix type sends the SRS signal to the base station in different subframes in the same subframe.
  • the terminal configures an uplink cyclic prefix used by a corresponding subframe or a radio frame or multiple radio frame sets according to a subframe or a radio frame or a location of multiple radio frame sets corresponding to different uplink cyclic prefix types. Types of.
  • the duration length C1 of one of the type 1 or type 2 uplink cyclic prefixes is smaller than the duration length C2 of the other type of uplink cyclic prefix.
  • a cyclic prefix type configuration apparatus which is located in a base station, and includes: a sending module, configured to send configuration information set to indicate an uplink cyclic prefix type to different terminals;
  • the uplink cyclic prefix type is classified into a type one uplink cyclic prefix and a type two uplink cyclic prefix according to the time domain length;
  • the different terminals include: at least two types of terminals, and/or terminals of at least two types of services; a subframe/radio frame set of type 1 and/or type 2 uplink cyclic prefix configured for one type of terminal or service, is a subframe of the same type of uplink cyclic prefix configured for another type of terminal or service/ A subset of the set of wireless frames.
  • a device for configuring a cyclic prefix type which is located in a terminal, and includes: a receiving module, configured to receive configuration information that is set to indicate an uplink cyclic prefix type; wherein the uplink loop
  • the prefix type is classified into a type one uplink cyclic prefix and a type two uplink cyclic prefix according to the length of the time domain; a subframe type 1 and/or a type 2 uplink cyclic prefix configured for one terminal or service of a different terminal or service.
  • Radio frame set is a subset of the subframe/radio frame set of the same type of uplink cyclic prefix configured for another type of terminal or service.
  • the base station sends configuration information that is set to indicate the uplink cyclic prefix type to different terminals, where the uplink cyclic prefix type is classified into at least one type of uplink cyclic prefix according to the length of the time domain.
  • Type 2 uplink cyclic prefix; the different terminal includes: at least two types of terminals, and/or terminals of at least two types of services; and type 1 and/or type configured for one type of terminal or service
  • the subframe/radio frame set of the two uplink cyclic prefix is a subset of the subframe/radio frame set of the same type of uplink cyclic prefix configured for another type of terminal or service, and solves the uplink resource utilization in the related art.
  • the problem of lower rate increases the utilization of uplink resources.
  • FIG. 1 is a schematic diagram of a frame structure and a cyclic prefix of an LTE/LTE-A system according to related art
  • FIG. 2 is a flowchart of a method for configuring a cyclic prefix type according to an embodiment of the present invention
  • FIG. 3 is a structural block diagram of a device for configuring a cyclic prefix type according to an embodiment of the present invention
  • FIG. 4 is a flowchart of another method for configuring a cyclic prefix type according to an embodiment of the present invention.
  • FIG. 5 is a structural block diagram of another apparatus for configuring a cyclic prefix type according to an embodiment of the present invention.
  • FIG. 6 is a schematic diagram of different cyclic prefix subframe sets configured by different types of terminals according to a preferred embodiment of the present invention.
  • FIG. 2 is a flowchart of a method for configuring a cyclic prefix type according to an embodiment of the present invention. As shown in FIG. 2, the method includes the following steps:
  • Step S202 the base station sends configuration information that is set to indicate an uplink cyclic prefix type to different terminals;
  • the uplink cyclic prefix type is classified into a type one uplink cyclic prefix and a type two uplink cyclic prefix according to a time domain length;
  • the different terminals include: at least two types of terminals, and/or terminals of at least two types of services;
  • a subframe/radio frame set of type 1 and/or type 2 uplink cyclic prefix configured for one type of terminal or service is a subframe/wireless of the same type of uplink cyclic prefix configured for another type of terminal or service A subset of the set of frames.
  • the base station sends configuration information that is set to indicate the uplink cyclic prefix type to different terminals to perform uplink cyclic prefix type configuration.
  • configuration for one type of terminal or service (also becomes type two)
  • Subframe/radio frame set of a certain type of uplink cyclic prefix configured by the terminal or service is a subframe of the same type of uplink cyclic prefix of another type of terminal or service (also becoming type 1 terminal or service) / A subset of the wireless frame set.
  • the uplink cyclic prefix type of the configured subframe/radio frame is the same type of type one.
  • the problem of low utilization of uplink resources improves the utilization of uplink resources.
  • the base station sends the configuration information by using physical layer signaling or high layer signaling, where the physical layer signaling includes a newly added dedicated downlink control indication format, and/or an existing downlink control indication. Reserved bits in the format.
  • the configuration information included in the physical layer signaling or the high layer signaling includes the subframe/radio frame set, and a cyclic prefix type corresponding to the subframe/radio frame set.
  • the minimum unit for configuring the uplink cyclic prefix type for the different terminals by the base station includes one of the following: a subframe, one or more radio frames; optionally, the configuration may be performed according to a preset period.
  • the terminal or service of the type is used as the terminal or service of the type 2, and the terminal or service of the other type is used as the terminal or service of the type 1, and the base station passes the configuration information.
  • the cyclic prefix type of the type 1 terminal or the uplink partial subframe or the radio frame or the set 1 of the multiple radio frames is configured as the type 1 or type 2 uplink cyclic prefix, and the remaining subframes or wireless
  • the cyclic prefix type of the second set of frames or multiple radio frames is correspondingly configured as another type of uplink cyclic prefix.
  • the base station configures, by using the configuration information, a cyclic prefix type of a partial subframe or a radio frame or a set of three radio frames in the terminal of the type 2 or the service, and the Collecting an uplink cyclic prefix of the same type, wherein the set three is a subset of the set one; and/or, the base station passes through
  • the configuration information is configured to configure, in the type 2 terminal or the uplink partial subframe or the radio frame or the cyclic prefix type of the set 4 of the plurality of radio frames, the same type of uplink cyclic prefix as the set 2, where The set four is a subset of the set two.
  • the base station indicates a corresponding subframe or a radio frame or multiple radio frame collections in the different terminals by using a subframe or a radio frame or a location of multiple radio frame sets corresponding to different uplink cyclic prefix types.
  • the base station configures, by using the configuration information, a cyclic prefix type of a partial subframe or a radio frame or a set of multiple radio frames in the terminal of the type 1 or the service, Type 1 or Type 2 uplink cyclic prefix, but a lower version of the terminal (also known as a legacy terminal) that does not support the configuration method of the cyclic prefix type still uses a cyclic prefix of a certain length according to the configuration.
  • the base station receives a sounding reference signal (Sounding Reference Signal, SRS for short) that is sent by the different terminal and the traditional terminal that does not support the configuration of the cyclic prefix type in different subframes in the same subframe. )signal.
  • SRS Sounding Reference Signal
  • the duration length C1 of one of the type 1 or type 2 uplink cyclic prefixes is smaller than the duration length C2 of the other type of uplink cyclic prefix.
  • C1 and C2 may be different single values or selected from a set, wherein the set contains the number of elements greater than or equal to 2.
  • the base station after the base station sends the configuration information that is set to indicate the uplink cyclic prefix type to different terminals, the base station receives the uplink signal sent by the different terminal according to the configuration information.
  • a cyclic prefix type configuration device is also provided, which is located in the base station, and the device is configured to implement the foregoing embodiment and the preferred embodiment, which has been described. No longer.
  • the term "module” may implement a combination of software and/or hardware of a predetermined function.
  • the apparatus described in the following embodiments is preferably implemented in software, hardware, or a combination of software and hardware, is also possible and contemplated.
  • FIG. 3 is a structural block diagram of a device for configuring a cyclic prefix type according to an embodiment of the present invention. As shown in FIG. 2, the device includes a sending module 32, which is described in detail below.
  • the sending module 32 is configured to send, to the different terminals, the configuration information that is set to indicate the uplink cyclic prefix type, where the uplink cyclic prefix type is at least divided into a type one uplink cyclic prefix and a type two uplink cyclic prefix according to the time domain length;
  • Different terminals include: at least two types of terminals, and/or terminals of at least two types of services; and, for one type of terminal or service configured type one and/or type two before the uplink loop
  • the spliced subframe/radio frame set is a subset of the subframe/radio frame set of the same type of uplink cyclic prefix configured for another type of terminal or service.
  • FIG. 4 is a flowchart of another method for configuring a cyclic prefix type according to an embodiment of the present invention. As shown in FIG. 4, the method includes :
  • Step S402 the terminal receives configuration information that is set to indicate an uplink cyclic prefix type, where
  • the uplink cyclic prefix type is classified into a type one uplink cyclic prefix and a type two uplink cyclic prefix according to a time domain length;
  • a subframe/radio frame set of type 1 and/or type 2 uplink cyclic prefix configured for a terminal or service of one of the different types of terminals or services is an uplink loop of the same type configured for another type of terminal or service
  • a subset of the prefixed subframe/radio frame set is an uplink loop of the same type configured for another type of terminal or service
  • the terminal receives the configuration information that is set to indicate the uplink cyclic prefix type to perform the uplink cyclic prefix type configuration.
  • the configuration for one type of terminal or service (also becomes the type 2 terminal or A sub-frame/radio frame set of a certain type of uplink cyclic prefix configured to be a subframe/radio frame of the same type of uplink cyclic prefix of another type of terminal or service (also becoming a type 1 terminal or service) A subset of the collection.
  • the uplink cyclic prefix type of the configured subframe/radio frame is the same type of type one.
  • the problem of low utilization of uplink resources improves the utilization of uplink resources.
  • the configuration information is obtained by receiving physical layer signaling or high layer signaling, where the physical layer signaling includes a newly added dedicated downlink control indication format, and/or an existing downlink control. Indicates the reserved bits in the format.
  • the minimum unit including the uplink cyclic prefix type in the configuration information includes one of the following: a subframe, one or more radio frames; optionally, the configuration information is configured in a preset period.
  • the terminal or the service of the one type is the terminal or the service of the type 2
  • the terminal or the service of the other type is the terminal or service of the type 1
  • the type is according to the configuration information.
  • a cyclic prefix type of a partial subframe or a radio frame or a set of multiple radio frames in a terminal or service is configured
  • the cyclic prefix type of the remaining subframe or the radio frame or the set 2 of the plurality of radio frames is configured as another type of uplink cyclic prefix.
  • the cyclic prefix type of the uplink type partial subframe or the radio frame or the set three of the plurality of radio frames in the terminal of the type 2 or the service is configured to be the same as the set one.
  • the cyclic prefix type of the set four of the radio frames is configured as the same type of uplink cyclic prefix as the set two, wherein the set four is a subset of the set two.
  • the terminal configures an uplink cyclic prefix used by a corresponding subframe or a radio frame or multiple radio frame sets according to a subframe or a radio frame or a location of multiple radio frame sets corresponding to different uplink cyclic prefix types. Types of.
  • a cyclic prefix type of a partial subframe or a radio frame or a set of multiple radio frames in the type 1 terminal or service is configured as the type one or A lower version terminal (also referred to as a legacy terminal) that does not support the configuration method of the cyclic prefix type, but does not support the cyclic prefix type, still uses a cyclic prefix of a certain length according to the configuration.
  • the different terminals and the legacy terminal that does not support the configuration method of the cyclic prefix type send SRS signals to the base station in different subframes in the same subframe.
  • the duration length C1 of one of the type 1 or type 2 uplink cyclic prefixes is smaller than the duration length C2 of the other type of uplink cyclic prefix.
  • C1 and C2 may be different single values or selected from a set, wherein the set contains the number of elements greater than or equal to 2.
  • a device for configuring a cyclic prefix type is provided, which is located in the terminal, and the device is configured to implement the foregoing embodiment and the preferred embodiment, and has been performed.
  • the term "module” may implement a combination of software and/or hardware of a predetermined function.
  • the apparatus described in the following embodiments is preferably implemented in software, hardware, or a combination of software and hardware, is also possible and contemplated.
  • FIG. 5 is a structural block diagram of another apparatus for configuring a cyclic prefix type according to an embodiment of the present invention. As shown in FIG. 5, the apparatus includes a receiving module 52, which is described in detail below.
  • the receiving module 52 is configured to receive configuration information that is set to indicate an uplink cyclic prefix type, where the uplink cyclic prefix type is at least divided into a type one uplink cyclic prefix and a second type before the uplink loop according to the time domain length.
  • a subframe/radio frame set of type 1 and/or type 2 uplink cyclic prefix configured for a terminal or service of one of the different types of terminals or services, of the same type configured for another type of terminal or service
  • a subset of the subframe/radio frame set of the upstream cyclic prefix A subset of the subframe/radio frame set of the upstream cyclic prefix.
  • a method for transmitting an uplink signal of an OFDM system is provided, and specifically, an uplink signal transmission method using different cyclic prefixes in a wireless communication system.
  • the preferred embodiment proposes an uplink cyclic prefix configuration method, which mainly solves the problem that different types of terminal users use different cyclic prefixes. Perform uplink transmission problems to avoid interference and ensure the normal communication requirements of the terminal equipment.
  • the method is as follows:
  • the base station sends configuration information of the uplink cyclic prefix type to different types of terminals.
  • the cyclic prefix type is classified into a type one cyclic prefix and a type two cyclic prefix according to the time domain length.
  • the different types include at least two types of terminals, namely a type one terminal and a type two terminal.
  • the subframe/radio frame set of the type 1 or type 2 uplink cyclic prefix configured for the type 2 terminal or service is a subset of the subframe/radio frame set of the same type of uplink cyclic prefix configured for the type 1 terminal or service.
  • the base station configures an uplink cyclic prefix type of different types of terminals by using physical layer signaling or high layer signaling.
  • the physical layer signaling includes a new downlink control indication format and reserved bits in an existing downlink control indication format.
  • the configuration information included in the physical layer signaling or the high layer signaling includes a subframe set and a cyclic prefix type of the subframe set.
  • the base station configures the uplink cyclic prefix type of each user to be a minimum unit of a subframe or a radio frame or N radio frames, and optionally has a periodicity.
  • the base station configures some subframes or radio frames or N radio frame sets A of the type one terminal uplink into a cyclic prefix type one subframe by using the physical layer signaling or the high layer signaling. Or cyclic prefix Type two subframes, and configure the remaining subframes or radio frames or N radio frame sets U as a cyclic prefix type two subframe or a cyclic prefix type one subframe.
  • the base station configures some subframes or radio frames or N radio frame sets B of the type 2 terminal uplink into a cyclic prefix type one subframe by using the physical layer signaling or the high layer signaling. Or a cyclic prefix type of two subframes, where B is a subset of A.
  • the base station configures a subframe of a cyclic prefix type 1 or a cyclic prefix type 2 of the terminal, or a radio frame or a set of N radio frames, and indicates that different terminals respectively use subframes of different CPs according to different locations. Or a radio frame or a collection of N radio frames.
  • configuration 1 long CP subframe set A ⁇ subframe#0, 1, 2, 3, 4 ⁇ , short CP subframe set U ⁇ frame#5, 6, 7, 8, 9 ⁇
  • configuration 2 long CP Radio frame set A ⁇ frame#0, 1, 2 ⁇ , short CP radio frame set U ⁇ frame#3, 4, 5, 6, 7, 8, 9 ⁇
  • configuration 3 long CP 40ms radio frame set A ⁇ frame #0-3, 4-7, 8-11, 12-15 ⁇ , short CP 40ms radio frame set U ⁇ frame#16-19, 20-23, 24-27, 28-31, 32-35, 36- 39 ⁇ ;
  • the base station configures a cyclic prefix type 1 of the type 2 terminal or a subframe or a radio frame or a set of N radio frames of the cyclic prefix type 2, and indicates that different terminals respectively use subframes of different CPs according to different positions. Or a radio frame or a collection of N radio frames.
  • configuration 1 long CP subframe set A ⁇ subframe#0, 1, 2 ⁇ , short CP subframe set U ⁇ frame#7, 8, 9 ⁇
  • configuration 2 long CP radio frame set A ⁇ frame#0 , 1 ⁇ , short CP radio frame set U ⁇ frame#6, 7, 8, 9 ⁇
  • configuration 3 long CP 40ms radio frame set A ⁇ frame#0-3, 4-7 ⁇ , short CP 40ms radio frame set U ⁇ frame#24-27, 28-31, 32-35, 36-39 ⁇ ;
  • the base station uses the physical layer signaling or the high layer signaling configuration type to use a cyclic prefix type one subframe or a cyclic prefix type two in a subframe or a radio frame or N radio frame sets. Frames, lower version terminals still use a cyclic prefix of a certain length according to the existing high layer signaling configuration.
  • the base station receives the SRS signal transmitted by the type 1 terminal and/or the type 2 terminal and the lower version terminal in different subframes using the same cyclic prefix.
  • the type 2 (or type 1) cyclic prefix duration length C1 is smaller than the type one (type 2) cyclic prefix duration length C2, and C1 and C2 are different single values or may be from the set C. Select, the number of elements in the C set is greater than or equal to 2.
  • the base station receives the uplink signal sent by the terminal according to the uplink cyclic prefix configuration information.
  • the method is as follows:
  • the terminal receives the configuration information of the uplink cyclic prefix type.
  • the cyclic prefix type is classified into a type one cyclic prefix and a type two cyclic prefix according to the time domain length.
  • the subframe/radio frame set of the type 1 or type 2 uplink cyclic prefix configured for the type 2 service is a subset of the subframe/radio frame set of the same type of uplink cyclic prefix configured for the type 1 service.
  • the configuration information is carried by the base station through physical layer signaling or higher layer signaling.
  • the physical layer signaling includes a new downlink control indication format and reserved bits in an existing downlink control indication format.
  • the uplink cyclic prefix type is a minimum unit of a subframe or a radio frame or N radio frames, and optionally has a periodicity.
  • the type-terminal knows that some subframes or radio frames or N radio frame sets A of the uplink are configured as a cyclic prefix type-subframe or loop through the physical layer signaling or the high layer signaling.
  • the prefix type two subframes, the remaining subframes or radio frames or the N radio frame sets U are configured as a cyclic prefix type two subframe or a cyclic prefix type one subframe.
  • the type 2 terminal learns that some subframes or radio frames or N radio frame sets B of the uplink are configured as a cyclic prefix type by one subframe or loop through the physical layer signaling or the high layer signaling.
  • the prefix type is two subframes, where B is a subset of A.
  • the type-terminal is configured with a cyclic prefix type 1 or a cyclic prefix type 2 subframe or a radio frame or a N radio frame set, and different terminals are used to indicate different terminals respectively using different CP subframes. Or a radio frame or a collection of N radio frames.
  • configuration 1 long CP subframe set A ⁇ subframe#0, 1, 2, 3, 4 ⁇ , short CP subframe set U ⁇ frame#5, 6, 7, 8, 9 ⁇
  • configuration 2 long CP Radio frame set A ⁇ frame#0, 1, 2 ⁇ , short CP radio frame set U ⁇ frame#3, 4, 5, 6, 7, 8, 9 ⁇
  • configuration 3 long CP 40ms radio frame set A ⁇ frame #0-3, 4-7, 8-11, 12-15 ⁇ , short CP 40ms radio frame set U ⁇ frame#16-19, 20-23, 24-27, 28-31, 32-35, 36- 39 ⁇ ;
  • the type 2 terminal is configured with a cyclic prefix type 1 or a cyclic prefix type 2 subframe or a radio frame or a N radio frame set, and different terminals are used to indicate different terminals respectively using different CP subframes. Or a radio frame or a collection of N radio frames.
  • configuration 1 long CP subframe set A ⁇ subframe#0, 1, 2 ⁇ , short CP subframe set U ⁇ frame#7, 8, 9 ⁇
  • configuration 2 long CP radio frame set A ⁇ frame#0 , 1 ⁇ , short CP radio frame set U ⁇ frame#6, 7, 8, 9 ⁇
  • configuration 3 long CP 40ms radio frame set A ⁇ frame#0-3, 4-7 ⁇ , short CP 40ms radio frame set U ⁇ frame#24-27, 28-31, 32-35, 36-39 ⁇ ;
  • the type-terminal is configured to use the cyclic prefix type one subframe or the cyclic prefix type in the subframe or the radio frame or the N radio frame sets by receiving the physical layer signaling or the high layer signaling.
  • the lower version terminal still uses a cyclic prefix of a certain length according to the existing high layer signaling configuration.
  • the Type 1 terminal and/or the Type 2 terminal and the lower version terminal transmit SRS signals to the base station using different cyclic prefixes in the same subframe.
  • the type 2 (or type 1) cyclic prefix duration length C1 is smaller than the type one (type 2) cyclic prefix duration length C2, and C1 and C2 are different single values or may be from the set C. Select, the number of elements in the C set is greater than or equal to 2.
  • the uplink cyclic prefix configuration method proposed by the preferred embodiment it is possible to solve the problem that the end users with different requirements and different types use different cyclic prefixes for uplink transmission, and improve the uplink transmission efficiency.
  • the base station configures different uplink cyclic prefix types for different types of terminals.
  • the cyclic prefix type is classified into a type one cyclic prefix and a type two cyclic prefix according to the time domain length.
  • the different types include at least two types of terminals, namely a type one terminal and a type two terminal.
  • the application type includes at least a type one terminal, such as a high version terminal in a cellular network, and a type 2 terminal, such as a D2D communication terminal.
  • FIG. 6 is a schematic diagram of different cyclic prefix subframe sets configured by different types of terminals according to a preferred embodiment of the present invention.
  • the subframe/radio frame set of the uplink cyclic prefix configured for the type 2 terminal is type one.
  • the terminal type includes at least: an MTC terminal, a D2D terminal, a lower version terminal, and a higher version terminal.
  • the service type includes at least: unicast service, D2D service, small packet service, and broadcast service.
  • the base station configures an uplink cyclic prefix type of each user by using physical layer signaling or high layer signaling.
  • the physical layer signaling includes a new downlink control indication format and reserved bits in an existing downlink control indication format.
  • the reserved bit field in the DCI Format 0/1A is preferentially used, for example, the kbit information is used to indicate the terminal from the received current subframe.
  • the next subframe start indicates that a different length cyclic prefix in the predefined set is performed, wherein the predefined set includes a subframe or a radio frame or a set of N radio frames.
  • DCI Format X The included bit field includes at least one of: a subframe indicating a different length cyclic prefix or a radio frame or a set of N radio frames.
  • the base station configures an uplink cyclic prefix type of each user as a minimum unit of a subframe or a radio frame or N radio frames, and optionally has a periodicity.
  • the period is 10 ms; when the uplink cyclic prefix type of each user is configured in a minimum unit of the radio frame, the period is 100 ms; When the radio frame is configured as the minimum unit, the uplink cyclic prefix type of each user is configured, and the period is 400 ms.
  • the base station configures some subframes or radio frames or N radio frame sets A of the type one terminal uplink into a cyclic prefix type one subframe or a cyclic prefix type two by using the physical layer signaling or the high layer signaling.
  • Frame, the remaining subframe or radio frame or N radio frame set U is configured as a cyclic prefix type two subframe or a cyclic prefix type one subframe.
  • the base station configures the cell to use the extended cyclic prefix type for the uplink transmission by using the existing high layer signaling “UL-CyclicPrefixLength”, and performs the N ms time.
  • the central high version user in the cell has its own uplink service to be transmitted and is transmitted in the last five subframes of the radio frame #k, and the base station will use the physical layer signaling to configure the last five subframes of the radio frame #k as The short cyclic prefix subframe, while the first five subframes of the radio frame #k are still extended cyclic prefix types.
  • the base station will not schedule the legacy user to use the extended cyclic prefix for uplink service transmission in the last five subframes of the radio frame #k.
  • the base station configures the cell to use the conventional cyclic prefix type by using the existing high layer signaling "UL-CyclicPrefixLength" and performs the N ms time.
  • the cell edge high version users in the cell have their own uplink services to be transmitted and are transmitted in the radio frames #k, k+1, k+2, k+3, and the base station will use the physical layer signaling to configure the radio frame.
  • #k, k+1, k+2, and k+3 are long cyclic prefix subframes, and the remaining radio frames in time N are still of the regular cyclic prefix type.
  • the base station will not schedule the legacy users to use the regular cyclic prefix for uplink service transmission in the radio frames #k, k+1, k+2, and k+3.
  • the base station configures, by using the physical layer signaling or the high layer signaling, some subframes or radio frames or N radio frame sets B of the type 2 terminal uplink into a cyclic prefix type one subframe or a cyclic prefix type two sub-subs Frame, where B is a subset of A.
  • the base station configures the cell to use the extended cyclic prefix type for the uplink transmission by using the existing high layer signaling “UL-CyclicPrefixLength”, and performs the N ms time.
  • the D2D users in the cell have their own uplink services to be transmitted and are transmitted in the last three subframes of the radio frame #k, and the base station will use the physical layer signaling to configure the last three subframes of the radio frame #k as short loops. Prefix subframe.
  • the base station will not schedule the legacy user to use the extended cyclic prefix for uplink service transmission in the last three subframes of the radio frame #k.
  • the base station configures the cell to use the conventional cyclic prefix type by using the existing high layer signaling "UL-CyclicPrefixLength", and performs N Ms time.
  • the D2D users in the cell have their own uplink services to be transmitted and are transmitted in the radio frames #k, k+1, and the base station will use the physical layer signaling to configure the radio frames #k and k+1 as long cyclic prefix subframes. .
  • the base station will not schedule legacy users to use the regular cyclic prefix for uplink service transmission in the radio frames #k, k+1.
  • the base station configures a subframe of a cyclic prefix type 1 or a cyclic prefix type 2 of the terminal, or a radio frame or a set of N radio frames, and indicates that different terminals respectively use subframes or radio frames of different CPs or N according to different locations.
  • configuration 1 long CP subframe set A ⁇ subframe#0, 1, 2, 3, 4 ⁇ , short CP subframe set U ⁇ frame#5, 6, 7, 8, 9 ⁇
  • configuration 2 long CP Radio frame set A ⁇ frame#0, 1, 2 ⁇ , short CP radio frame set U ⁇ frame#3, 4, 5, 6, 7, 8, 9 ⁇
  • configuration 3 long CP 40ms radio frame set A ⁇ frame #0-3, 4-7, 8-11, 12-15 ⁇ , short CP 40ms radio frame set U ⁇ frame#16-19, 20-23, 24-27, 28-31, 32-35, 36- 39 ⁇ ;
  • the base station configures a cyclic prefix type 1 or a cyclic prefix type 2 subframe or a radio frame or a N radio frame set of the second terminal, and indicates that different terminals respectively use different CP subframes or radio frames or N wireless according to different positions. Frame collection.
  • configuration 1 long CP subframe set A ⁇ subframe#0, 1, 2 ⁇ , short CP subframe set U ⁇ frame#7, 8, 9 ⁇
  • configuration 2 long CP radio frame set A ⁇ frame#0 , 1 ⁇ , short CP radio frame set U ⁇ frame#6, 7, 8, 9 ⁇
  • configuration 3 long CP 40ms radio frame set A ⁇ frame#0-3, 4-7 ⁇ , short CP 40ms radio frame set U ⁇ frame#24-27, 28-31, 32-35, 36-39 ⁇ ;
  • the base station uses the physical layer signaling or the high layer signaling configuration type
  • the terminal uses a cyclic prefix type one subframe or a cyclic prefix type two subframe in a subframe or a radio frame or N radio frame sets, and a lower version.
  • the terminal still uses a cyclic prefix of a certain length in accordance with the existing high layer signaling configuration.
  • the base station receives the SRS signal transmitted by the type 1 terminal and/or the type 2 terminal and the lower version terminal in the same subframe using different cyclic prefixes.
  • type 2 (or type 1) cyclic prefix duration length C1 is smaller than the type one (type 2) cyclic prefix duration length C2, C1 and C2 are different single values or can be selected from the set C, the C set The number of elements is greater than or equal to 2.
  • C1 is 4.67us and C2 is 16.7us; C1 and C2 are selected from the set C ⁇ 2, 5, 10 ⁇ us and satisfy C1 ⁇ C2.
  • the preferred embodiment of the present invention configures the cyclic prefix for the uplink transmission by using the method provided by the present invention.
  • the base station configures the cyclic prefix used by the cell uplink transmission to be a regular cyclic prefix by using the existing high layer signaling “UL-CyclicPrefixLength”.
  • the type 2 terminal D2D user appears in the cell and the two D2D user configurations use the extended cyclic prefix, and it is necessary to continue 2 radio frames, and from the radio frame #30, the intra-type type one terminal high version user is at the cell edge. And there is an uplink service that needs to be transmitted, and it lasts for 4 radio frames.
  • the legacy UE in the cell has no data transmission in the radio frame ⁇ #30, 31, 32, 33 ⁇ .
  • the base station transmits physical layer signaling DCI format X to subframe #5 of radio frame #12 to the higher version cell edge user who needs to use the extended cyclic prefix, indicating that its cyclic prefix type is in the aggregate radio frame ⁇ #30, 31, 32, 33 ⁇ is a long cyclic prefix, and the remaining radio frame sets in time N are regular cyclic prefixes.
  • the base station simultaneously transmits the physical layer signaling DCI format X1 to the D2D user who needs to use the extended cyclic prefix in subframe #5 of the radio frame #12, indicating that its cyclic prefix type is a long cyclic prefix in the aggregate radio frame ⁇ #32, 33 ⁇ .
  • the long cyclic prefix length is 16.7us.
  • the intra-cell uplink transmission still uses the regular cyclic prefix. Until the subframe #5 of the radio frame 62 receives the change to the extended cyclic prefix, the extended cyclic prefix is used for uplink transmission.
  • the base station in the uplink transmission during the configuration of the regular cyclic prefix, can allow the high version user and the D2D user to use the long cyclic prefix on the partial time domain resource by different configurations, wherein the high version user configures the long cyclic prefix type. More sub-frames than D2D users. And the traffic of different types of users is different to avoid interference of uplink and simultaneous transmission of different cyclic prefixes (for example, if the UL cyclic prefix of the D2D user equipment and the UL cyclic prefix of the legacy UE are independently configured, one solution is to ensure the D2D UE or the legacy UE. Uplink transmission may result in wasting part of the subframe resources.
  • Another solution is to simultaneously transmit D2D UEs and Legacy UEs with different CP lengths, using different physical resource blocks of the same subframe, which are no longer due to fast Fourier transform demodulation. Orthogonal, the base station receives the interference.), thereby avoiding the error caused by the retransmission and improving the uplink resource utilization.
  • the preferred embodiment of the present invention configures the cyclic prefix for the uplink transmission by using the method provided by the present invention.
  • the base station sends high layer signaling to the D2D user who needs to use the short cyclic prefix in subframe #0 of the radio frame #10, indicating that the short cyclic prefix can be the ⁇ #6, 7, 8 in every 100 ms radio frame in time N. 9, 10 ⁇ implementation.
  • the long cyclic prefix length is 6.67us.
  • the base station schedules the normal user configuration in the cell from the radio frame #10 to use the extended cyclic prefix for uplink transmission, and lasts for 5 radio frames.
  • the base station schedules multiple D2D user configurations in the cell from the radio frame #16 to use the short cyclic prefix for uplink transmission. 5 radio frames are continued, and the period is executed until the radio frame #70 subframe #0 receives the existing high layer signaling UL-CyclicPrefixLength.
  • the cyclic prefix used for configuring the uplink transmission of the cell is a regular cyclic prefix. At this time, the legacy UE traffic in the cell is compared. Small, no data is transmitted in the ⁇ #6, 7, 8, 9, 10 ⁇ in the 100m wireless frame set in time N.
  • the intra-cell uplink transmission will use a regular cyclic prefix.
  • the base station can use the flexible configuration to allow the D2D user to use the partial periodic time domain resource for uplink transmission when the cell is configured to use the extended cyclic prefix length for uplink transmission, and utilize the traffic of different types of users. Different uplink and simultaneous transmissions of different cyclic prefixes are used to avoid interference, thereby avoiding retransmission caused by errors and improving uplink resource utilization.
  • the preferred embodiment of the present invention configures the cyclic prefix for the uplink transmission by using the method provided by the present invention.
  • the base station configures the cyclic prefix used by the cell uplink transmission to be a regular cyclic prefix by using the existing high layer signaling “UL-CyclicPrefixLength”.
  • the type one terminal D2D user appears in the cell and the two D2D users need to transmit the D2D service configuration using the extended cyclic prefix, and it is necessary to continue the 2 radio frames, and start the intra-cell type one terminal D2D user from the radio frame #30.
  • the legacy UE in the cell has no data transmission in the radio frame ⁇ #30, 31, 32, 33 ⁇ .
  • the base station transmits physical layer signaling DCI format X in subframe #5 of radio frame #12 to the D2D cell edge user who needs to use the extended cyclic prefix, indicating that its cyclic prefix type is in the aggregate radio frame ⁇ #30, 31, 32, 33 ⁇ Long
  • the cyclic prefix, the remaining radio frame sets in time N are regular cyclic prefixes.
  • the base station simultaneously transmits the physical layer signaling DCI format X1 to the D2D user who needs to use the extended cyclic prefix in subframe #5 of the radio frame #12, indicating that its cyclic prefix type is a long cyclic prefix in the aggregate radio frame ⁇ #32, 33 ⁇ .
  • the long cyclic prefix length is 16.7us.
  • the intra-cell uplink transmission still uses the regular cyclic prefix. Until the subframe #5 of the radio frame 62 receives the change to the extended cyclic prefix, the extended cyclic prefix is used for uplink transmission.
  • the base station in the uplink transmission during the configuration of the regular cyclic prefix, can allow the D2D user unicast service and the D2D service to use the long cyclic prefix on the part of the time domain resource through different configurations, wherein the unicast service configuration long loop
  • the prefix type has more subframes than D2D services.
  • the traffic of different service types is used to avoid interference of uplink and simultaneous transmission of different cyclic prefixes, thereby avoiding retransmission caused by errors and improving uplink resource utilization.
  • a software is provided that is configured to perform the technical solutions described in the above embodiments and preferred embodiments.
  • a storage medium in which the above software is stored, including but not limited to an optical disk, a floppy disk, a hard disk, an erasable memory, and the like.
  • modules or steps of the present invention described above can be implemented by a general-purpose computing device that can be centralized on a single computing device or distributed across a network of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein.
  • the steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps thereof are fabricated as a single integrated circuit module.
  • the invention is not limited to any specific combination of hardware and software.
  • the method and apparatus for configuring a cyclic prefix type provided by the embodiments of the present invention have the following beneficial effects: the problem of low uplink resource utilization in the related art is solved, and the utilization of uplink resources is improved.

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  • Computer Networks & Wireless Communication (AREA)
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Abstract

L'invention concerne un procédé et un dispositif destinés à configurer un type de préfixe cyclique. Le procédé comporte l'étape suivante: une station de base envoie des informations de configuration qui sont spécifiées pour indiquer le type de préfixe cyclique de liaison montante à différents terminaux, le type de préfixe cyclique de liaison montante étant au moins divisé en un préfixe cyclique de liaison montante d'un premier type et un préfixe cyclique de liaison montante d'un deuxième type en fonction de la longueur d'un domaine temporel; les différents terminaux comportent: au moins deux types de terminaux, et/ou des terminaux d'au moins deux types de services; et un ensemble de sous-trame/trames radio du préfixe cyclique de liaison montante du premier type et/ou du deuxième type configuré pour un type de terminal ou de service est un sous-ensemble d'un ensemble de sous-trame/trames radio du même type de préfixe cyclique de liaison montante configuré pour un autre type de terminal ou de service. La présente invention résout le problème rencontré dans la technique apparentée, où le taux d'utilisation des ressources de liaison montante est relativement faible, et améliore le taux d'utilisation des ressources de liaison montante.
PCT/CN2015/074631 2014-09-05 2015-03-19 Procédé et dispositif de configuration de type de préfixe cyclique WO2016033956A1 (fr)

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