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WO2011038696A1 - Procédé et système de transmission d'informations de planification - Google Patents

Procédé et système de transmission d'informations de planification Download PDF

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Publication number
WO2011038696A1
WO2011038696A1 PCT/CN2010/077535 CN2010077535W WO2011038696A1 WO 2011038696 A1 WO2011038696 A1 WO 2011038696A1 CN 2010077535 W CN2010077535 W CN 2010077535W WO 2011038696 A1 WO2011038696 A1 WO 2011038696A1
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WIPO (PCT)
Prior art keywords
user equipment
carrier
next time
scheduling information
time period
Prior art date
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PCT/CN2010/077535
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English (en)
Chinese (zh)
Inventor
邓云
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ZTE Corp
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ZTE Corp
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Publication of WO2011038696A1 publication Critical patent/WO2011038696A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present invention relates to the field of wireless communication technologies, and in particular, to a method and system for scheduling information transmission.
  • the evolved wireless communication system can provide higher transmission rate, shorter transmission delay, and can support the 3rd Generation Partnership Project (3GPP) internal access system and 3GPP Mobility between access systems and non-3GPP access systems.
  • 3GPP 3rd Generation Partnership Project
  • FIG. 1 is a schematic diagram of a next-generation network architecture of a Long Term Evolution (LTE) system/system architecture evolution (SAE), as shown in FIG. 1, including an evolved radio access network ( Evolved Radio Access Network (E-RAN) and Evolved Packet Core Network (E-PCN).
  • E-RAN is composed of an evolved base station (eNodeB, referred to as an eNB), and the E-PCN is composed of a Mobility Management Entity (abbreviated as ⁇ ) and a Serving Gateway (S-GW).
  • eNodeB evolved base station
  • ⁇ Mobility Management Entity
  • S-GW Serving Gateway
  • the interface between the eNB and the core network is an S1 interface, where the interface between the eNB and the MME is represented as an S1-MME, which is used to complete the mobility management and the control plane function of the S1 interface; the interface between the eNB and the S-GW It is expressed as S1-U and is used to complete the routing and delivery of user data.
  • the eNBs are connected to each other through an X2 interface.
  • the X2 interface is used to complete the mobility management function of the user equipment (User Equipment, UE for short) in the active state and the information exchange between the peer eNBs.
  • a radio frame is 10 milliseconds as shown in Figure 2. It consists of 10 sub-frames, each of which is 1 millisecond. In one radio frame, the subframe is from subframe 0 to subframe. 9 Composition, each subframe consists of two slots. Each radio frame corresponds to a System Frame Number (SFN), and the system frame number is cyclically used from 0 to 1023.
  • SFN System Frame Number
  • the information of Discontinuous Reception is set.
  • the network setting DRX is considered from the requirements of the service and the power saving of the user equipment.
  • the user equipment in the connected state is not configured with the DRX, the user equipment needs to continuously detect the PDCCH and detect the PDCCH that belongs to itself.
  • the user equipment in the connected state configures the DRX, the user equipment only needs to be in the active time (Active-time).
  • the PDCCH is continuously detected (in the awake state), and the PDCCH (in the sleep state) is not required to be detected for the rest of the time.
  • the use of DRX can reduce the detection of the PDCCH by the user equipment, the user equipment still needs to continuously detect the PDCCH in Active-time.
  • LTE Advance proposes to use carrier aggregation (CA) to achieve greater bandwidth.
  • one cell is composed of multiple consecutive or discontinuous carriers (each carrier is called It is composed of a component carrier and a component carrier, and can provide multi-carrier services for the UE at the same time.
  • the component carrier can use a carrier compatible with the LTE system, and such a carrier is called a backward compatible carrier; the component carrier can also use a carrier that is not compatible with the existing LTE system, and such a carrier is called a non-backward compatible carrier, and such a carrier Can only be used for Release 10 and above UEs.
  • multiple component carriers that operate are called an active carrier set, or a scheduled carrier set, or a set of service carriers, and can be classified into a UE UL Component Carrier Set and a UE according to uplink and downlink.
  • Downstream carrier set (UE DL Component Carrier Set).
  • the downlink carrier set of the UE may be further divided into a physical downlink control channel carrier set and a physical downlink shared channel carrier set, and the physical downlink control channel carrier set and the physical downlink shared channel carrier set may be the same set or different sets.
  • Some carriers may only provide PDSCH.
  • a UE in a connected state in a carrier aggregation cell needs to continuously detect a PDCCH of all allocated downlink carriers, and detects a PDCCH belonging to itself according to the RNTI. Since the UE works on multiple carriers, the UE continuously detects the allocated PDCCH and needs more operations and more energy. How to enable the UE to effectively detect the PDCCH without packet loss, the existing protocol does not provide A reasonable solution. Summary of the invention
  • the present invention provides a method and system for scheduling information transmission, which is used to indicate that a user equipment can detect a physical downlink control channel more efficiently without packet loss, thereby avoiding energy consumption caused by blind detection.
  • the present invention provides a method for scheduling information transmission, including: the network side notifying the scheduling information of the next time period of the user equipment by air interface signaling;
  • the user equipment After receiving the air interface signaling, the user equipment determines whether to detect the physical downlink control channel when the next time period arrives according to the scheduling information of the next time period.
  • the air interface signaling may be radio resource control signaling, or medium access control layer signaling, or physical downlink control channel signaling.
  • the starting position of the next time period may be the starting position of the subframe corresponding to the time when the user equipment receives the air interface signaling; or the starting position of the next time period may be the time when the user equipment receives the air interface signaling.
  • the starting position of the Nth subframe after the corresponding subframe, N is a positive integer greater than or equal to 1.
  • the starting position of the next time period may be notified by the network side device through the air interface signaling, or may be configured in a default manner; the step of configuring in the default mode may include: the default or the protocol specifies the starting of the Nth subframe
  • the start time, or the default or protocol specifies the interval between the subframes corresponding to the time when the Nth subframe receives the air interface signaling carrying the scheduling information.
  • the time limit or the infinite time length is notified by the network side device through the air interface signaling to the user equipment, or is configured by default.
  • the scheduling information may include: subframe information in which the physical downlink control channel of the user equipment exists; and/or subframe information of the physical downlink control channel of the user equipment does not exist; or the scheduling information may include physical downlink in which the user equipment exists Continuous time information of the control channel; and/or no continuous time information of the physical downlink control channel of the user equipment.
  • the network side device may notify the user equipment of scheduling information of the next time period of one or more carriers by air interface signaling.
  • the network side device may notify the next time period scheduling information of one or more carriers by using one carrier; or may notify the user equipment to schedule information in the next time period of the current carrier by using each carrier.
  • network side The user equipment may be configured to schedule the number of physical downlink control channels of the user equipment or the number of carriers of the user equipment in each subframe, and/or to schedule carrier information of the user equipment in each subframe.
  • the carrier information corresponding to the scheduling information may be indicated in the air interface signaling.
  • the carrier information may be represented by a frequency, or by a carrier index, or by a physical layer identification of the carrier, or by a global identification of the carrier.
  • the present invention further provides a method for scheduling information transmission, including: the network side notifying, by air interface signaling, scheduling information of a user equipment in a next time period of one or more carriers.
  • the method may further include: after receiving the scheduling information, the user equipment determines whether to detect the physical downlink control channel according to the received scheduling information of the next time period.
  • the air interface signaling may be radio resource control signaling, or medium access control layer signaling, or physical downlink control channel signaling.
  • the starting position of the next time period may be the starting position of the subframe corresponding to the time when the user equipment receives the radio resource control signaling, or the medium access control layer signaling, or the physical downlink control channel signaling; Alternatively, the starting position of the next time period may refer to the following after the subframe corresponding to the time when the user equipment receives the radio resource control signaling, or the medium access control layer signaling, or the physical downlink control channel signaling.
  • the starting position of N subframes, N is a positive integer greater than or equal to 1.
  • the start position of the Nth subframe may be notified to the user equipment by the network side device through the air interface signaling, or may be configured in a default manner; the default configuration may refer to the Nth subframe and the user equipment receiving the signaling carrying the scheduling information.
  • the interval between the corresponding subframes may be determined by default, or may be referred to as the starting position of the Nth subframe, in the manner specified by the protocol.
  • the scheduling information may refer to the information of the time or subframe in which the physical downlink control channel of the user equipment exists; or may refer to the information of the time or subframe of the physical downlink control channel that does not include the user equipment; or may refer to each sub- Scheduling the number of physical downlink control channels of the user equipment in the frame, Or the number of carriers of the user equipment is scheduled; or may be the carrier information of the user equipment scheduled in each subframe; or may be a combination of four.
  • the network side device may notify the user equipment of the scheduling information of the next time period of the one or more carriers by using one carrier; or may notify the user equipment of the scheduling information of the next time period of the carrier by using the respective carriers.
  • the carrier information corresponding to the scheduling information may be indicated in the air interface signaling.
  • the carrier information may be represented by a frequency, or may be represented by a carrier index, or may be represented by a physical layer identification of the carrier, or may be represented by a global identification of the carrier.
  • the present invention also provides a system for scheduling information transmission, including: a network side device and a user equipment, where:
  • the network side device is configured to notify the user equipment of scheduling information of the next time period of one or more carriers by air interface signaling;
  • the user equipment is configured to receive the air interface signaling, and determine whether to detect the physical downlink control channel according to the scheduling information of the next time period.
  • the air interface signaling may be the radio resource control signaling, or the medium access control layer signaling, or the physical downlink control channel signaling.
  • the starting position of the next time period may be the time at which the user equipment receives the air interface signaling.
  • the start position of the subframe; or, may be the start position of the Nth subframe after the subframe corresponding to the moment when the user equipment receives the air interface signaling, where N is a positive integer greater than or equal to 1.
  • the scheduling information may include: subframe information in which the physical downlink control channel of the user equipment exists; and/or subframe information in which the physical downlink control channel of the user equipment does not exist; or the scheduling information may include: physical downlink in which the user equipment exists Continuous time information of the control channel; and/or continuous time information of the physical downlink control channel of the user equipment; the network side device may also be configured to: in carrier aggregation, notify the user equipment to schedule the user equipment in each subframe The number of physical downlink control channels or the number of carriers scheduling the user equipment, and/or scheduling the user equipment in each subframe Carrier information.
  • the network side device may be configured to notify the user equipment of scheduling information of the next time period of the one or more carriers by: in carrier aggregation, notifying the user equipment of the next time period of the one or more carriers by one carrier Scheduling information; or separately notifying the scheduling information of the user equipment in the next time period of the carrier by using each carrier.
  • the network side device may be configured to: when the carrier device is notified of the scheduling information of the next time period of the one or more carriers by using one carrier, the carrier information corresponding to the scheduling information may be indicated in the air interface signaling, where: the carrier information may be used.
  • the frequency representation or may be represented by a carrier index, or may be represented by a physical layer identifier of the carrier, or may be represented by a global identifier of the carrier.
  • the network side device notifies the user equipment of the scheduling information of the next time period by the air interface signaling, and after receiving the scheduling information, the UE can know in advance when the network will schedule itself.
  • the UE can detect the PDCCH at an appropriate time and can selectively monitor the PDCCH to avoid invalid operation and energy loss caused by continuous detection of the PDCCH. This allows the user equipment UE to find its own PDCCH according to the scheduling information, avoiding the energy consumption caused by blind detection.
  • FIG. 1 is a schematic diagram of a next-generation network architecture in which an LTE system/system architecture evolves
  • FIG. 2 is a schematic diagram showing the structure of a radio frame in an LTE system
  • FIG. 3 is a schematic diagram of a method and system for transmitting scheduling information according to the present invention.
  • the user equipment needs to continuously detect the physical downlink control channel PDCCH.
  • the present invention provides an optimized technical solution for transmitting scheduling information. As shown in FIG. 3, the core idea is: the network side device notifies the user through air interface signaling. The scheduling information of the next time period of the device. User setting After receiving the scheduling information, according to the received scheduling information of the next time period, it is determined whether to detect the physical downlink control channel when the next time period arrives.
  • the network side notifies the user equipment by air interface signaling such as radio resource control signaling, or medium access control layer signaling, or physical downlink control channel signaling.
  • air interface signaling such as radio resource control signaling, or medium access control layer signaling, or physical downlink control channel signaling.
  • the start position of the next time period is the start position of the next subframe of the corresponding subframe of the air interface signaling, or the user equipment receives the air interface signaling
  • the starting position of a certain subframe after the subframe, for example, the Nth subframe after, N is a natural number greater than 1.
  • the starting position of the Nth subframe is configured by the network side through the air interface signaling to the UE or by default configuration.
  • the default mode configuration refers to an interval between the Nth subframe and the subframe corresponding to the air interface signaling, or a default configuration of the Nth subframe, or a protocol specified by the protocol. The way is decided.
  • the next time period refers to a finite time length or a period of time of an infinite time length.
  • the scheduling information refers to time or subframe information of a PDCCH in which the user equipment exists, or time or subframe information of a PDCCH without the user equipment, or a combination of the two.
  • the network side In carrier aggregation, the network side notifies the user equipment of scheduling information for the next time period of one or more carriers.
  • the user equipment After receiving the scheduling information, the user equipment determines whether to monitor the PDCCH according to the scheduling information in the next time period.
  • the system for scheduling information transmission of the present invention includes: a network side device and a user equipment, where:
  • the network side device is configured to notify the user equipment of scheduling information of the next time period of one or more carriers by air interface signaling;
  • the user equipment is configured to receive the scheduling information of the next time period, and determine whether to detect the physical downlink control channel according to the received scheduling information of the next time period.
  • the air interface signaling is a radio resource control signaling, or a medium access control layer signaling, or a physical downlink control channel signaling.
  • the starting position of the next time period refers to that the user equipment receives the wireless The resource control signaling, or the medium access control layer signaling, or the physical downlink control channel signaling, the start position of the subframe corresponding to the time; or, the user equipment receives the wireless resource control
  • N is a positive integer greater than or equal to 1 at the start position of the Nth subframe after the subframe corresponding to the time.
  • the next time period is a period of time having a finite length of time or an infinite length of time.
  • the scheduling information refers to the information of the time or subframe in which the physical downlink control channel of the user equipment exists; or the information of the time or subframe of the physical downlink control channel that does not include the user equipment; or The number of physical downlink control channels for scheduling the user equipment in each subframe, or the number of carriers for scheduling the user equipment; or the carrier information for scheduling the user equipment in each subframe (refers to carrier information of the PDCCH in which the UE exists) ); or a combination of four.
  • the network side device notifies the scheduling information of the next time period of the one or more carriers of the user equipment by using one carrier; or notifying the user equipment of the next time period of the carrier by using each carrier Scheduling information.
  • the network side device When the network side device notifies the next time period scheduling information of the one or more carriers of the user equipment by using one carrier, the network side device needs to indicate carrier information corresponding to the scheduling information in the air interface signaling, where:
  • the carrier information is represented by a frequency, or by a carrier index, or by a physical layer identifier of a carrier, or by a global identifier of a carrier.
  • a method for transmitting scheduling information includes: The network side notifies the scheduling information of the next time period of the user equipment by air interface signaling. Further, after receiving the scheduling information of the next time period, the user equipment determines whether to detect the physical downlink control channel when the next time period arrives according to the received scheduling information of the next time period.
  • the air interface signaling is radio resource control signaling, or medium access control layer signaling, or physical downlink control channel signaling.
  • the starting position of the next time period refers to a subframe corresponding to the time when the user equipment receives the RRC control signaling, or the medium access control layer signaling, or the physical downlink control channel signaling.
  • the start position of the next subframe; or the start position of the next time period refers to the user equipment receiving the radio resource control signaling, the medium access control layer signaling, or the physical downlink control In channel signaling
  • N is a positive integer greater than 1 at the start position of the Nth subframe after the subframe corresponding to the time.
  • the starting position of the Nth subframe is notified by the network side device through the air interface signaling, or is configured by using a default mode.
  • the default mode configuration means that the Nth subframe is received by the user equipment.
  • the interval between the corresponding subframes when the signaling carrying the scheduling information is used The default configuration, or the starting position of the Nth subframe, is determined in the manner specified by the protocol.
  • the next time period is a period of time having a finite length of time or an infinite length of time.
  • the or the configuration is configured by default.
  • the scheduling information refers to the information of the time or subframe in which the physical downlink control channel of the user equipment exists; or the information of the time or subframe of the physical downlink control channel that does not include the user equipment; or two Combination of people.
  • the network side device In the carrier aggregation, the network side device notifies the scheduling information of the user equipment in the next time period of one or more carriers by air interface signaling. In the carrier aggregation, the network side device notifies the next time period scheduling information of one or more carriers by using one carrier; or notifies the user equipment to schedule information in the next time period of the carrier by using the respective carriers. In the carrier aggregation, the network side also informs the user equipment to schedule the number of physical downlink control channels of the user equipment in each subframe, or to schedule the number of carriers of the user equipment, or to schedule carrier information of the user equipment.
  • the network side device When the network side device notifies the next time period scheduling information of the one or more carriers of the user equipment by using one carrier, the network side device needs to indicate carrier information corresponding to the scheduling information in the air interface signaling.
  • the carrier information is represented by a frequency, or by a carrier index, or by a physical layer identifier of a carrier, or by a global identifier of a carrier.
  • the present invention further provides a method for scheduling information transmission, including:
  • the network side notifies the user equipment of scheduling information of the next time period of one or more carriers by air interface signaling. Further, after receiving the scheduling information, the user equipment determines whether to detect the physical downlink control channel according to the received scheduling information of the next time period.
  • the air interface signaling is radio resource control signaling, or medium access control layer signaling, or physical downlink control channel signaling.
  • the starting position of the next time period refers to a subframe corresponding to the time when the user equipment receives the radio resource control signaling, the medium access control layer signaling, or the physical downlink control channel signaling. Or the starting position of the next time period, when the user equipment receives the RRC control signaling, the medium access control layer signaling, or the physical downlink control channel signaling,
  • the starting position of the Nth subframe after the subframe of the moment, ⁇ is a positive integer greater than or equal to 1.
  • the start position of the Nth subframe is notified to the user equipment by the network side device through air interface signaling, or is configured by using a default manner; the default mode configuration means that the Nth subframe is received by the user equipment.
  • the interval between the corresponding subframes when carrying the signaling of the scheduling information is determined by a default configuration, or the starting position of the Nth subframe is determined by a protocol.
  • the next time period is a period of time having a finite length of time or an infinite length of time.
  • the or the configuration is configured by default.
  • the scheduling information refers to the information of the time or subframe in which the physical downlink control channel of the user equipment exists; or the information of the time or subframe of the physical downlink control channel that does not include the user equipment; or The number of physical downlink control channels for scheduling the user equipment in each subframe, or the number of carriers for scheduling the user equipment; or the carrier information for scheduling the user equipment in each subframe; or a combination of four.
  • the network side device notifies the next time period scheduling information of the one or more carriers of the user equipment by using one carrier; or notifying the user equipment to schedule the next time period of the carrier by using each carrier information.
  • the network side device When the network side device notifies the next time period scheduling information of the one or more carriers of the user equipment by using one carrier, the network side device needs to indicate carrier information corresponding to the scheduling information in the air interface signaling.
  • the carrier information is represented by a frequency, or by a carrier index, or by a physical layer identifier of a carrier, or by a global identifier of a carrier.
  • the UE In the LTE system, the UE is located in the connected state of the serving cell, and the UE has a working carrier of the uplink and the downlink respectively.
  • the UE needs to continuously detect the PDCCH and detect its own PDCCH according to its own RNTI.
  • the network side notifies the UE of the scheduling information of the next time period by air interface signaling. After receiving the scheduling information, the UE will know in advance when the network will schedule itself, and the UE can detect the PDCCH at an appropriate time. Avoid invalid operation and energy loss caused by continuous detection of PDCCH.
  • the network side uses Radio Resource Control (RRC) signaling,
  • RRC Radio Resource Control
  • the air interface signaling such as the medium access control layer signaling, or the physical downlink control channel (referred to as the PDCCH, or the physical downlink control channel), notifies the UE of the scheduling information, that is, the network side notifies the UE. Scheduling information for the next time period.
  • RRC Radio Resource Control
  • the next time period may be limited time information, such as 10 milliseconds, or may be infinitely long time information, that is, the network always schedules the UE in a certain manner (such as periodicity); the next time period may be the UE receiving.
  • the period immediately after the air interface signaling, such as the next 10 milliseconds, may also be a non-immediate period after receiving the signaling, and the start time of the period may be in the signaling. Point out, or use the default mode, the default way is to start from the start position of the next radio frame (10 msec for a radio frame) or the start position of the Nth radio frame.
  • the network side can also indicate the exact time information of the start and/or termination of the next time period by air interface signaling, that is, by indicating the end time (or subframe) to indicate the length of the next time period.
  • the scheduling information may be time or subframe information for scheduling the UE on the network side (that is, time or subframe information of the PDCCH in which the UE exists), or time or subframe information in which the UE is not scheduled.
  • Media access control layer signaling is also called MAC Control Element (MAC CE).
  • the existing MAC CE includes the Buffer Status Report reported by the UE and the Power Headroom. Includes CRNTI, TA command (Tiing Advance Command), etc. for network configuration. If the network side informs the UE of the scheduling information of the next time period through the medium access control layer (MAC) signaling, in order to implement the network side to notify the UE of the scheduling information of the next time period, the existing MAC CE needs to be extended to include the UE. Scheduling information in the next time period.
  • MAC medium access control layer
  • the scheduling information may be time or subframe information for scheduling the UE within 10 milliseconds (the next time period) after the UE receives the medium access control layer signaling, for example, immediately after the first millisecond and the fifth.
  • the UE is scheduled in milliseconds and in the 8th millisecond.
  • the UE After receiving the medium access control layer signaling, the UE only needs to detect the PDCCH in the first millisecond, the fifth millisecond, and the eighth millisecond, and does not need to continuously detect in the entire next time period.
  • the UE may turn off the radio frequency receiving unit to save energy, and may also use the spare time to obtain the system message of the neighboring area (if it is necessary to acquire the system message of the neighboring area) ), or do other things.
  • the UE is notified of the first subframe information of the first, fifth, and eighth subframes (the subframe information for scheduling the UE is present), and the UE may be notified of the second, third, fourth, sixth, seventh, and ninth , 10 these seven Information of the subframe (the subframe information of the UE is not scheduled).
  • the UE is notified that there is one millisecond of scheduling, three milliseconds without scheduling, one millisecond with scheduling, two milliseconds without scheduling, one millisecond with scheduling, and two milliseconds without scheduling.
  • the scheduling information sent by the network side may be a continuous time period or a discontinuous time period. The total duration is equal to the length of the next time period.
  • the network side may transmit new scheduling information in the next 5th or 8th millisecond, and after receiving the new scheduling information, the UE performs PDCCH detection according to the new scheduling information.
  • the UE performs the next period of scheduling information by using RRC signaling or PDCCH signaling, it is also necessary to extend the content of the existing protocol to include such scheduling information related to the user equipment.
  • the UE can learn the scheduling information of the next time period, and can selectively monitor the PDCCH in a suitable subframe or time, avoid unnecessary detection, and save energy.
  • the application scenario of the instance 2 is an LTE Advance system, and the UE is in an idle state in a carrier aggregation cell.
  • the carrier-aggregated cell contains a component carrier in Band 1 (Band1), and there are 3 consecutive component carriers CC (fl ), CC (£2), CC ( ⁇ ) in the downlink, and 3 consecutive carriers CC in the uplink ( F4), CC (f5), CC (f6),
  • the component carrier is identified by the frequency information of each component carrier, but the present invention does not limit the carrier identification mode. All three downlink carriers transmit system messages and paging messages.
  • the UE initiates random access in the uplink CC (f4) and the downlink CC (fl), and successfully accesses the cell aggregated by the carrier. Since the UE supports multiple carriers and the traffic is very large, the base station allocates component carriers ULCC (f5) and DLCC (f2) to the UE, that is, the UE simultaneously uses two component carriers, the uplink carrier set of the UE, and the downlink of the UE.
  • the carrier set contains two carriers.
  • the PDCCH is transmitted by the two carriers in the downlink carrier set of the UE. The UE needs to receive the PDCCH of the two carriers and solve the PDCCH of its own according to the RNTI of the UE.
  • the network side notifies the UE of the scheduling information of the next time period by air interface signaling, and after receiving the scheduling information of the next time period, the UE knows when the network will schedule itself, and the UE can be at the appropriate time. Detecting the PDCCH to avoid invalid operation caused by continuous detection of the PDCCH Energy loss. Since the downlink carrier of the UE has two carriers, the network side needs to separately indicate scheduling information of the UE in the next time period of the two carriers.
  • the network side will use the air resource control (Radio Resource Control, RRC for short) signaling, the medium access control layer signaling, or the Physical Downlink Control Channel (PDCCH) for the next time period.
  • RRC Radio Resource Control
  • PDCCH Physical Downlink Control Channel
  • the next time period may be limited time information, such as 20 milliseconds, or may be infinitely long time information, that is, the network always schedules the UE in a certain manner (such as periodicity); the next time period may be the UE.
  • the period immediately after the receipt of the air interface signaling is as follows: 20 milliseconds; or may be a period of time after the air interface signaling is received, and the start time of the period may be in the letter.
  • the command indicates, or uses the default mode, the default way, for example, starting from the start of the next radio frame (a radio frame of 10 milliseconds) or the start of the Nth radio frame.
  • the scheduling information may be time or subframe information for scheduling the UE on the network side (that is, time or subframe information of the PDCCH in which the UE exists), or may be time or subframe information in which the UE is not scheduled.
  • the network side may notify the UE of the scheduling information of the next time period of the two carriers CC ( fl ) and CC ( £ 2 ) through the downlink CC ( fl ), or may also be on the downlink CC ( fl ) and the downlink CC ( fl ) respectively.
  • the scheduling information of the UE in the next time period of the respective carriers is respectively indicated.
  • the network side needs to indicate the carrier information in the air interface signaling, and the carrier information may be represented by a frequency or by a carrier index (Carrier Index) or by using a carrier. Physical layer ID or global ID representation.
  • the UE receives the signaling sent by the network side through the RRC signaling or the MAC signaling or the PDCCH in the downlink CC ( fl ), and includes, in the signaling, that the UE is in the downlink CC ( fl ) and the downlink CC respectively ( £2) scheduling information of the next time period.
  • the starting position of the next time period is set to the default setting, and 10 milliseconds after receiving the signaling, the length of the next time period may be By the signaling configuration or the default setting, in the present embodiment, the length of the next time period is set to 20 milliseconds by default.
  • the scheduling information is that within a certain period of 10 milliseconds after receiving the signaling, some specific subframes will schedule the UE.
  • the UE After receiving the air interface signaling with the scheduling information, the UE needs to continuously detect the PDCCH on the two carriers in the subsequent 10 milliseconds, and only needs to be in a specific subframe within 20 milliseconds after the 10 milliseconds. Detecting PDCCHs on respective carriers. During the rest of the time, the UE can turn off the RF receiving unit to save energy, and can also use these spare time to obtain the system message of the neighbor (if it needs to obtain the system message of the neighbor), or do other things. The UE needs to continuously detect the PDCCH after the next time length.
  • a continuous component carrier is taken as an example.
  • the processing of the discontinuous component carrier is substantially the same as the processing of the continuous component carrier, and details are not described herein again.
  • the example application scenario is an LTE Advance system, and the UE is in an idle state in a carrier aggregation cell.
  • the carrier component of the carrier aggregation includes component carriers CC (fl), CC (£2), CC ( ⁇ ), and 3 consecutive carriers CC in the band 1 (Band 1). (f4), CC (f5), CC (f6), it should be noted that, in this example, the component carrier is identified by the frequency information of each component carrier, but the present invention does not limit the carrier identification mode.
  • the three downlink carriers all send system messages and paging messages.
  • the UE initiates random access in the uplink CC (f4) and the downlink CC (fl), and successfully accesses the cell aggregated by the carrier. Since the UE supports multiple carriers and the traffic is very large, the base station allocates component carriers ULCC (f5) and ULCC (f6), DL CC (f2) and DL CC ( ⁇ ) to the UE, that is, the uplink carrier set of the UE at this time. And the downlink carrier set of the UE includes three carriers.
  • the network side indicates the scheduling information of the next time period through the physical downlink control channel PDCCH, and the next time period may include the subframe in which the PDCCH signaling is received.
  • the network side indicates the scheduling information of the next time period of the UE in the PDCCH of the DL CC ( fl ), and assumes that the UE receives the PDCCH at the time when the SFN is 3 and the subframe is 4, and the network side indicates that the UE is
  • the scheduling information of the downlink carrier in the next 10 subframes that is, 10 milliseconds
  • the network side also instructs the UE to schedule the number of UEs when the SFN is 3 and the subframe is 4, that is, the network side is at several times.
  • the downlink carrier transmits the PDCCH of the UE, or the number of PDCCHs for scheduling the UE, and the network side may also indicate explicit carrier information for scheduling the UE (represented by frequency, or carrier index, or by physical layer identifier or global identifier of the carrier). In this way, the UE may only need to detect a specific carrier. As an alternative, the network side may indicate that carrier information of the UE is not scheduled. The network side also instructs the UE to schedule UEs in each of the next 10 subframes.
  • the network may also indicate that each subframe schedules carrier information of the UE (represented by frequency, or carrier index, or by physical layer identifier or global identifier of the carrier).
  • the network side instructs the UE to schedule the number of the UEs in each subframe (or the number of PDCCHs of the UE), and may reduce the detection of multiple carriers by the UE, for example, the UE follows DL CC ( fl ) and CC ( £ 2 ) in each subframe. And CC ( ⁇ ) sequentially detect the PDCCH.
  • the UE can stop detecting after detecting the PDCCH that satisfies the number, especially if the UE is detecting the DL CC ( fl ) After the PDCCH, the PDCCH is detected by the RNTI, and the number of the current subframe scheduling is 1, and the UE can detect the PDCCH of the DL CC (£2) and the DL CC ( ⁇ ). Similarly, if the network side instructs the UE to schedule carrier information of the UE in each subframe (in this embodiment, the carrier information of the PDCCH of the UE exists), the UE can detect a specific carrier according to the clear carrier information, and avoid unnecessary detection.
  • the network side may only indicate the number of scheduled UEs in the current subframe of the received PDCCH (the number of carriers scheduling the UE, or the number of PDCCHs for scheduling the UE), or scheduling carrier information of the UE. And indicating, in the current subframe that receives the PDCCH, and the number of the UEs in each subframe for a later period of time, or the carrier information of the UE, and the period after receiving the PDCCH (the next or the next) Then, the number of the UEs is scheduled, or the carrier information of the UE is scheduled.
  • the network side may only indicate that the UE schedules (or does not schedule) the exact subframe of the UE in the current carrier, and may also indicate that the UE schedules (or does not schedule) the exact child of the UE in other one or more carriers. Frame information.
  • the above methods can also be used in combination on the network side.
  • modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed 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, or they may be separately fabricated into individual integrated circuit modules, or they may be Multiple modules or steps are made into a single integrated circuit module. Thus, the invention is not limited to any particular combination of hardware and software.
  • the present invention can avoid invalid operation and energy loss caused by continuous detection of the PDCCH, so that the user equipment UE can find its own PDCCH according to the scheduling information, thereby avoiding energy consumption caused by blind detection.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention porte sur un procédé et sur un système de transmission d'informations de planification. Le procédé comprend les opérations suivantes : un équipement côté réseau indique à un équipement utilisateur des informations de planification du segment temporel suivant par une signalisation d'interface radio; après la réception de ladite signalisation d'interface radio, conformément auxdites informations de planification du segment temporel suivant, lorsque le segment temporel suivant est atteint, l'équipement utilisateur détermine de détecter ou non un canal de commande de liaison descendante physique (PDCCH). La présente invention permet d'éviter une opération inutile et un gaspillage d'énergie dû à la détection continue du canal PDCCH, de sorte que l'équipement utilisateur (UE) peut trouver un PDCCH lui appartenant conformément aux informations de planification, et ainsi éviter un gaspillage d'énergie dû à une détection à l'aveugle.
PCT/CN2010/077535 2009-09-30 2010-09-30 Procédé et système de transmission d'informations de planification Ceased WO2011038696A1 (fr)

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