WO2010075823A1 - 消息传输的方法、设备及系统 - Google Patents

消息传输的方法、设备及系统 Download PDF

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Publication number
WO2010075823A1
WO2010075823A1 PCT/CN2010/070025 CN2010070025W WO2010075823A1 WO 2010075823 A1 WO2010075823 A1 WO 2010075823A1 CN 2010070025 W CN2010070025 W CN 2010070025W WO 2010075823 A1 WO2010075823 A1 WO 2010075823A1
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Prior art keywords
random access
access preamble
message
transmission
preamble group
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PCT/CN2010/070025
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English (en)
French (fr)
Inventor
阳建军
高闻
刘亚林
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华为技术有限公司
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Priority claimed from CN200910119914A external-priority patent/CN101772175A/zh
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Publication of WO2010075823A1 publication Critical patent/WO2010075823A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W74/00Wireless channel access, e.g. scheduled or random access
    • H04W74/002Transmission of channel access control information
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W4/00Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/12Messaging; Mailboxes; Announcements
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W74/00Wireless channel access, e.g. scheduled or random access
    • H04W74/08Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]
    • H04W74/0833Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using a random access procedure

Definitions

  • the application is filed on January 5, 2009, and the application number is CN 200910003437.X, and the invention name is "method of message transmission, network equipment, user equipment and system", and Priority of the Chinese Patent Application filed on February 26, 2009, the Chinese Patent Application No. CN 200910119914.9, entitled “Message Transmission Method, Network Equipment, User Equipment and System", the entire contents of which are incorporated by reference.
  • the present invention relates to the field of communications, and in particular, to a method, device, and system for message transmission.
  • LTE Long Term Evolution
  • HQQ Hybrid Automatic Retransmission Request
  • FDD Frequency Division Duplex
  • FDD Frequency Division Duplex
  • the transmission time slot corresponding to each HARQ process is a Transmission Time Interval (TTI).
  • TTI bundling mode for uplink transmission, that is, multiple consecutive TTIs simultaneously transmit the same data, thereby improving transmission gain.
  • the plurality of TTIs that are continuously transmitted are called TTI bundles, and the number of consecutively transmitted TTIs is called a Bundle size.
  • the same data transmitted at the same time is actually a plurality of different versions of the same data. That is, a plurality of data blocks with different error correction capabilities generated after the same data is encoded.
  • the TTI binding mode is adopted, the TTIs in the same TTI bundle are transmitted by the same HARQ process.
  • the message 3 sent by the UE in the random access procedure in the contention mode refers to the first uplink message of the HARQ transmission in the random access process, or the second message transmitted in the uplink during the random access process, or A Radio Resource Configuration (RRC) connection setup request message or an RRC connection reestablishment request message.
  • RRC Radio Resource Configuration
  • Embodiments of the present invention provide a method, a network device, a user equipment, and a system for message transmission.
  • the technology is as follows:
  • An embodiment of the present invention provides a method for message transmission, where the method includes:
  • An embodiment of the present invention provides a method for message transmission, where the method includes:
  • the indication information indicating that the message is transmitted in the TTI binding mode by using the transmission time interval; and transmitting the message 3 in the TTI binding mode.
  • the embodiment of the present invention provides a network device, where the network device includes: a receiving module, a determining module, and a notification module; the receiving module is configured to receive a random access preamble sent by the user equipment UE, and is further configured to receive the The UE uses the message 3 transmitted in the transmission time interval TTI binding mode;
  • the determining module is configured to: when the UE needs to use the TTI binding mode to transmit the message 3, trigger the notification module;
  • the notification module is configured to notify the UE to transmit the message 3 by using the TTI binding mode after receiving the trigger of the determining module.
  • the embodiment of the present invention provides a user equipment, where the user equipment includes: a sending module and an obtaining module, where the sending module is configured to send a random access preamble and a message 3;
  • the obtaining module is configured to obtain an indication message indicating that the message 3 is transmitted in the TTI binding mode by using the transmission time interval.
  • An embodiment of the present invention provides a method for message transmission, where the method includes:
  • the random access preamble indication message 3 transmission mode is a transmission time interval TTI binding mode
  • the message 3 is transmitted in the TTI bonding mode.
  • An embodiment of the present invention provides a user equipment, where the user equipment includes: a sending module;
  • the sending module is configured to send a random access preamble, where the random access preamble indication message 3 transmission mode is a transmission time interval TTI binding mode; and is further used to transmit the message 3 by using the TTI binding mode.
  • An embodiment of the present invention provides a system for transmitting a message, where the system includes at least a user equipment UE; the UE is configured to send a random access preamble, and the random access preamble indication message 3 is in a transmission mode.
  • the inter-space TTI bonding mode is further configured to transmit the message 3 to the network device by using the TTI bonding mode.
  • the embodiment of the present invention provides a system for message transmission, where the system includes at least a network device, and the network device is configured to receive a random access preamble sent by the user equipment UE and transmit the TTI binding mode by using the transmission time interval.
  • the message 3 is further configured to determine that the UE needs to transmit the message 3 by using the TTI bonding mode, and notify the UE to use the TTI bonding mode to transmit the message 3.
  • the transmission access indication mode 3 when the transmission access indication mode 3 is used to transmit the random access preamble in the TTI binding mode, or the network side determines that the UE needs to use the TTI binding mode to transmit the message 3, the UE is notified to use the TTI binding mode to transmit the message 3, which can Solving the problem that the UE cannot transmit the message 3 in the TTI bonding mode, and the random access procedure cannot be completed in the case of limited power.
  • FIG. 1 is a schematic flowchart of a method for message transmission according to Embodiment 1 of the present invention
  • FIG. 2 is a schematic structural diagram of a network device according to Embodiment 4 of the present invention.
  • FIG. 3 is a schematic structural diagram of a user equipment according to Embodiment 5 of the present invention.
  • FIG. 4 is a schematic flowchart of a method for message transmission according to Embodiment 6 of the present invention.
  • FIG. 5 is a schematic flowchart of a method for message transmission according to Embodiment 8 of the present invention.
  • Figure 6 is a schematic diagram of the preamble group division provided in Embodiment 8 of the present invention.
  • FIG. 7 is a schematic flowchart of a method for message transmission according to Embodiment 9 of the present invention.
  • FIG. 8 is a schematic structural diagram of a user equipment according to Embodiment 10 of the present invention.
  • the technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of them. Example. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.
  • the UE in the idle state does not have the TTI binding resource configured by the eNB, and if the UE accesses the TTI bonding mode that the eNB cannot learn, the uplink transmission conflict occurs;
  • the UE and the eNB cannot learn whether the UE configures the TTI binding or allocates a TTI binding resource to it through the preamble message. Therefore, the UE uses the TTI binding mode to send the message 3 in the random access process in the contention mode. The random access process cannot be completed.
  • the transmission access indication message 3 is transmitted in the TTI binding mode, or the network side determines that the UE needs to transmit the message 3 in the TTI binding mode.
  • the UE is notified to transmit the message 3 in the TTI binding mode, which can solve the problem that the UE cannot transmit the message 3 in the TTI bonding mode, and the random access process cannot be completed in the case of limited power.
  • a first embodiment of the present invention provides a method for message transmission, where the method may include the following steps: S101: Receive a random access preamble sent by a UE;
  • S102 Determine that the UE needs to transmit the message 3 in the TTI binding mode, and notify the UE to use the TTI binding mode to transmit the message 3;
  • S103 Receive a message 3 that is transmitted by the UE in a TTI bonding mode.
  • Embodiment 2 of the present invention provides a method for message transmission, and the method may include the following steps.
  • S201 The UE sends a random access preamble to the eNB.
  • the process of sending a random access preamble by the UE in the prior art is applicable to this step, and details are not described herein again.
  • S202 The eNB receives the random access preamble, and determines that the UE needs to transmit the message 3 in a TTI binding mode. In this step, the eNB may preset a condition for determining that the UE needs to transmit the message 3 in the TTI binding mode, and when the actual measured value meets the preset condition, perform S203.
  • the eNB may preset the threshold A1 of the random preamble signal strength and/or the threshold B1 of the Timing Advance, when the eNB receives the random preamble signal strength less than the preset threshold A1, and/or the time advance amount is greater than the pre-
  • the threshold B1 is set, the eNB determines that the UE needs to transmit the message 3 in the TTI bonding mode, and executes S203.
  • S203 The eNB notifies the UE that the message 3 can be transmitted in the TTI binding mode.
  • the eNB may send indication information to the UE, where the indication information is used to notify the UE that the message 3 can be transmitted in the TTI binding mode.
  • the indication information may be included in a random access response message sent by the eNB.
  • the indication information may occupy a reserved bit of the random access response message or a reserved bit of an uplink grant information field (UL grant) in the random access response message. For example, when the reserved bit is 0, it indicates that the UE can transmit the message 3 in the TTI binding mode; when the reserved bit is 1 or null, it indicates that the UE cannot transmit the message 3 in the TTI binding mode.
  • a new field may be added to the random access response message to carry the indication information. For example, when the newly added field is 1, the UE may use the TTI binding mode to transmit the message 3; the newly added field is 0 or null or does not exist. Time, Indicates that the UE cannot transmit message 3 in the TTI bonding mode.
  • the eNB when the eNB determines that the UE needs to transmit the message 3 in the ⁇ binding mode, it allocates resources that the UE can use the TTI binding transmission mode to transmit the message, that is, the TTI binding mode transmission resource is continuous in the time domain.
  • Embodiment 3 of the present invention provides a method for message transmission, where the method includes:
  • S302 Receive indication information, where the indication information indicates that the message 3 can be transmitted in a TTI binding mode
  • S302 of this embodiment may further include: receiving, by the UE, a random access response message, and reading the indication information included in the message; optionally, the indication information may be a new field or a reserved bit of the message, or the message Reserved bits in the Medium Uplink Authorization Information field.
  • S302 and S303 in this embodiment may further include S302': receiving a TTI binding mode transmission resource, that is, the UE may use the TTI binding transmission mode to transmit the resource of the message 3. Then, in S303, the UE uses the resource to perform the message 3. Transmission.
  • Embodiment 4 of the present invention provides a network device 20, where the network device 20 includes: a receiving module 210, a determining module 220, and a notification module 230.
  • the receiving module 210 is configured to receive the random access preamble sent by the UE and the message 3 transmitted by the UE in the TTI binding mode; the determining module 220 is configured to: when the UE needs to use the TTI binding mode to transmit the message 3, trigger the notification module 230; The notification module 230 is configured to notify the UE to transmit the message 3 in the TTI binding mode after receiving the trigger of the determining module 220.
  • the determining module 220 may be further configured to save or acquire a preset condition that determines that the UE needs to transmit the message 3 in the TTI binding mode, and triggers the notification module 230 when the actual measured value meets the preset condition.
  • the preset condition saved by the determining module 220 is a threshold A1 of the preset random preamble signal strength and/or a threshold B1 of the Timing Advance, and the determining module 220 determines the random access preamble signal strength received by the receiving module 210.
  • the threshold is less than the preset threshold, and the time advance is greater than the preset threshold B1, it is determined that the UE needs to transmit the message 3 in the TTI binding mode, and the notification module 230 is triggered.
  • the notification module 230 can be configured to send indication information, where the indication information is used to notify the UE that the message 3 can be transmitted in the TTI binding mode.
  • the notification is
  • Embodiment 5 of the present invention provides a user equipment 30, where the user equipment 30 includes: a sending module 310 and an obtaining module 320.
  • the sending module 310 is configured to send a random access preamble and a message 3; the obtaining module 320 is configured to obtain indication information indicating that the message 3 can be transmitted in the TTI binding mode.
  • the obtaining module 320 may be configured to receive a random access response message, and read a reserved bit occupying the message, or occupy a reserved bit of an uplink grant information field included in the message, or occupy a new message. Added indication of the field.
  • the notification is
  • Embodiment 6 of the present invention provides a method for message transmission, where the method may include the following steps: S401: Send a random access preamble; the random access preamble indication message 3 transmission mode is a TTI binding mode;
  • S402 Transmit message 3 in TTI binding mode.
  • Embodiment 7 of the present invention provides a method for message transmission, and the method may include the following steps:
  • the random access preamble indication message 3 transmission mode is a TTI binding mode.
  • the sum of the maximum transmit power and the path loss is smaller than the network side receive power threshold.
  • the following may be included: When the UE transmits with the maximum transmit power, the desired receive power of the network side cannot be reached.
  • the expected receiving power of the network side is the power that the network side can successfully receive.
  • the maximum transmit power is smaller than the network-side receive power threshold.
  • the embodiment of the present invention is also applicable to the case where the sum of the maximum transmit power and the path loss is smaller than the receive power threshold of the network.
  • S402' The message is transmitted in the TTI binding mode.
  • Embodiment 8 of the present invention provides a method for message transmission, which may include the following steps.
  • S501 Configure a random access preamble group C, where the random access preamble group C includes more than one random access preamble indicating that the transmission mode is a TTI binding mode.
  • the preamble of the preset random access preamble group C ranges from 50 to 60, or the lower bound of the preamble in the preamble random access preamble group C is 50, and the random access preamble group C includes a preamble of 50-63. , a total of 14.
  • S502 Select a random access preamble for transmission from the random access preamble group C.
  • the selected random access preamble may be randomly selected from the random access preamble group C, or may be selected within the group according to a preset rule, for example, the priority selection group has the least number of used times, or has Use the lowest probability, or the last random access preamble.
  • the preamble in the random access preamble group C may indicate that the short length message 3 or the long message 3 is in the TTI binding mode, or the length of the message 3 is not distinguished, indicating that the TTI is adopted for all the messages 3. Bind mode transfer. Further, the random access preamble group C can be divided into more than one preamble group, for example, the random access preamble group C1 and the random access preamble group C2.
  • S503 Detect whether the maximum transmit power reaches the network side receive power threshold. If yes, execute S504; otherwise, execute S505.
  • S504 Send a random access preamble, and transmit the message in a non-TTI binding mode.
  • the random access preamble does not belong to the random access preamble group C preset by the S501.
  • the random access preamble in the random access preamble group A and/or the random access preamble group B may be a random access preamble of the random access preamble group A or the random access preamble group B, for indicating that the message 3 transmission mode is a non-TTI binding mode.
  • S505 Send a random access preamble in the random access preamble group C, and send the message 3 in a TTI binding mode.
  • the network side when receiving the preamble in the random access preamble group C, can learn that the UE requests to transmit the message in the TTI binding mode, and can further allocate the TTI binding mode transmission resource to the UE, and can also notify the UE to The TTI bonding mode transmission resource is allocated; the UE may send the message 3 by using the allocated resource.
  • the random access preamble group C including only one random access preamble may be preset in S501, and the random access preamble may be directly sent in S505 without performing intra-group selection.
  • the random access preamble can be divided into three groups, the random access preamble group eight, B, and C, and the random access preamble group A is used to transmit the short message 3, and the random access preamble group B is used.
  • the random access preamble group C is used to indicate that the message 3 transmission mode is the TTI binding mode.
  • An alternative of S501 in this embodiment may be: receiving a preamble packet message sent by a network side (such as an evolved base station eNB), and obtaining, by using the message, a value range of a preamble in the random access preamble group C, the random access preamble
  • the random access preamble indication message 3 in the group C is in the TTI binding mode.
  • the value range of the random access preamble group C may be directly obtained by using the preamble packet message, or may be randomly calculated according to the total number of random access preambles, the number of random access preamble groups A, and the number of random access preamble groups B. Access the range of values of the preamble in the preamble group C.
  • An alternative of S501 in this embodiment may be: receiving an RRC message sent by the network side, and obtaining a value range of the random access preamble group C included in the network.
  • the message includes the total number of random access preambles N ⁇ amWe , the number of preambles in the random access preamble group A, and the number N B of preambles in the random access preamble group B, and the number of preambles in the random access preamble group C.
  • N c is N preamb ie- N A - N B
  • the lower bound of the preamble in the random access preamble group C is N A + N B - ⁇
  • the range of the preamble in the random access preamble group C is N4 + N s -1 to N p ambl - ⁇ .
  • the lower bound of the preamble of the random access preamble, the number of preambles, and the range of the preamble have a conversion relationship, and the other two values can be calculated according to the value of one of them.
  • the number of preambles in the random access preamble group C is similar to the above method, and so on, and so on.
  • the preambles are divided into two groups: the random access preamble group A and the random access preamble group C, when the current pilot packet message includes the number of preambles in the random access preamble group A, it can be calculated according to the above method.
  • the preamble in the random access preamble group C may range from Nc -1 to w -l, of course, at all
  • the value range of the preamble in the random access preamble group C may also be 0 to N c -1, and the value range may be determined according to a protocol or negotiation.
  • the random preamble group C may be information that is set according to the protocol or saved by the UE, without configuration or acquisition. Further, after the UE configures or acquires the random access preamble C, the saved random access preamble group C may be saved or updated.
  • the embodiment may further include: selecting the random access preamble group C; Or, before S504, the embodiment may further include: selecting a random access preamble group A and/or 8. Further, if the random access preamble group C includes the random access preamble group C1 and the random access preamble group C2, before the S502, the embodiment may further include: selecting C1 or C2 in the random access preamble group C. . The process of selecting a random access preamble group is described in detail below.
  • ⁇ c is the preset path loss threshold when randomly selecting the preamble group C; ⁇ is the preset path loss threshold when the random access preamble group is selected; Bay ij, the condition for the UE to select the random access preamble group C Can be:
  • the length of the message to be sent 3 is less than the preset threshold and ⁇ > ⁇
  • the preset threshold is 80 bits. When the length of the message 3 is less than 80 bits, the length of the message is considered to be short. When the length of the message 3 is greater than 80 bits, the length of the message is considered to be long.
  • the condition for selecting the random access preamble group ⁇ or ⁇ may be:
  • the random access preamble group C includes the random access preamble group C1 and the random access preamble group C2, it is set as a preset path loss threshold when the random access preamble group C2 is selected; P ⁇ is preset Select the path loss threshold when accessing the preamble group A randomly;
  • the condition for selecting C1 or C2 in the random access preamble group C may be:
  • the selection of the preamble in the random access preamble group and the random access preamble group may be two independent steps, or may be combined into one step, that is, the selection of the preamble group and the preamble is performed at one time. For example, referring to FIG.
  • FIG. 6 is a schematic diagram of the preamble group division when the random access preamble group C includes C1 and C2; when PL ⁇ ⁇ £ ⁇ , a preamble is selected from the random access preamble group; when PL is in the corpse and C2 During the interval, a preamble is selected from the random access preamble group C2; the random access preamble groups B and C2 indicate that the length of the message 3 to be sent is greater than a preset threshold; when the path loss is between 2 and the corpse, from the random A preamble is selected in the access preamble group A.
  • a preamble is selected from the random access preamble group C1, and the random access preamble groups A and C1 indicate that the length of the message 3 to be sent is less than a preset threshold.
  • the random access preamble group C can be used to simultaneously support the message 3 of different lengths, and the preamble allocation information is broadcasted by the system message, and the value range of each random access preamble group is configured, and indicates whether Supports transmission of messages of different sizes as well as message power offset.
  • Embodiment 9 of the present invention provides a method for message transmission, where the method may include the following steps: S601: Configuring a random access preamble group C, the random access preamble group C includes more than one indication message 3 transmission The mode is a random access preamble of the TTI bonding mode;
  • S602 Select a random access preamble for sending from the random access preamble group C.
  • the selected random access preamble may be randomly selected from the random access preamble group C, or may be selected within the group according to a preset rule, for example, the priority selection group has the least number of used times, or has Use the lowest probability, or the last random access preamble.
  • the preamble in the random access preamble group C may indicate that the short length message 3 or the long message 3 is in the TTI binding mode, or the length of the message 3 is not distinguished, indicating that the TTI is adopted for all the messages 3. Bind mode transfer.
  • the random access preamble group C may be divided into more than one preamble group, such as a random access preamble group C1 and a random access preamble group C2.
  • the random access preamble is selected in the random access preamble group C, and the message is sent in the TTI binding mode.
  • the random access preamble group C selects the random access preamble to send to the network. It should be noted that if the UE has started the TTI bonding mode, the UE may initiate a random access procedure when the uplink data arrives and requires a new scheduling resource. Therefore, since the UE has adopted the TTI binding mode for transmission, therefore, When the random access preamble selection is performed, the random access preamble may be directly sent to the network side in the random access preamble group C.
  • the network side when receiving the preamble in the random access preamble group C, can learn that the UE requests to transmit the message in the TTI binding mode, and can further allocate the TTI binding mode transmission resource to the UE, and can also notify the UE to The TTI bonding mode transmission resource is allocated; the UE may send the message 3 by using the allocated resource.
  • the random access preamble group C including only one random access preamble may be preset in S601, and the random access preamble may be directly sent in S505 without performing intra-group selection.
  • An alternative of S601 in this embodiment may be: receiving a preamble packet message sent by a network side (such as an evolved base station eNB), and obtaining, by using the message, a value range of a preamble in the random access preamble group C, the random access preamble
  • the random access preamble indication message 3 in the group C is in the TTI binding mode.
  • the value range of the random access preamble group C may be directly obtained by using the preamble packet message, or may be randomly calculated according to the total number of random access preambles, the number of random access preamble groups A, and the number of random access preamble groups B. Access the range of values of the preamble in the preamble group C.
  • An alternative of the S601 in this embodiment may be: receiving an RRC message sent by the network side, and obtaining a value range of the random access preamble group C included in the network.
  • the message includes the total number of random access preambles N ⁇ amWe , the number N4 of preambles in the random access preamble group A, and the number N B of preambles in the random access preamble group B, and the preambles in the preamble group C are randomly accessed.
  • the number N c is N preamble - N A - N B
  • the lower bound of the preamble in the random access preamble group C is N A + N B - ⁇ , that is, the range of the preamble in the random access preamble group C is + ⁇ ⁇ ⁇ to N preambl -1.
  • the lower bound of the preamble, the number of preambles, and the preamble of the random access preamble group The range has a conversion relationship, and the other two values can be calculated based on the value of one of them.
  • the number of preambles in the random access preamble group C is similar to the above method, and can be deduced by analogy.
  • the preamble in the random access preamble group C may range from Nc -1 to -l, of course, when all the preambles are divided into two groups, the range of the preamble in the random access preamble group C can also be 0 to N c -1, which range of values can be used according to the protocol or negotiation. determine.
  • the random preamble group C may be information that is set according to the protocol or saved by the UE, without configuration or acquisition. Further, after the UE configures or acquires the random access preamble C, the saved random access preamble group C may be saved or updated.
  • the condition for selecting C1 or C2 in the random access preamble group C may be:
  • the selection of the preamble in the random access preamble group and the random access preamble group may be two independent steps, or may be combined into one step, that is, the selection of the preamble group and the preamble is performed at one time.
  • the random access preamble group C can be used to simultaneously support the message 3 of different lengths, and the preamble allocation information is broadcasted by the system message, and the value range of each random access preamble group is configured, and indicates whether Supports transmission of messages of different sizes as well as message power offset.
  • the embodiment 10 of the present invention provides a user equipment 40, where the user equipment includes a sending module 410, where the sending module 410 is configured to send a random access preamble, and the random access preamble indication message 3 transmission mode For the transmission time interval TTI bonding mode, the sending module 410 is further configured to transmit the message 3 in the TTI bonding mode.
  • the network side when receiving the preamble in the random access preamble group C, can learn that the UE requests to transmit the message in the TTI binding mode, and then allocate the TTI binding mode transmission resource to the UE.
  • the network side can The UE is notified to allocate a TTI bonding mode transmission resource.
  • the user equipment 40 further includes a triggering module 420, configured to perform uplink transmission when the UE has adopted the ⁇ binding mode, and/or when the maximum transmit power is less than the network side received power threshold, and/or when the UE has When the uplink transmission is performed in the ⁇ binding mode, the foregoing sending module 410 is triggered.
  • a triggering module 420 configured to perform uplink transmission when the UE has adopted the ⁇ binding mode, and/or when the maximum transmit power is less than the network side received power threshold, and/or when the UE has When the uplink transmission is performed in the ⁇ binding mode, the foregoing sending module 410 is triggered.
  • the user equipment 40 further includes a selecting module 430, configured to select, in the random access preamble group C, a random access preamble for sending, where the random access preamble group C includes more than one indication message 3 transmission mode. ⁇ Binding mode random access preamble.
  • the selected random access preamble may be randomly selected from the random access preamble group C, or may be selected within the group according to a preset rule, for example, the preferred number of used times in the group is the least, or used. The lowest probability, or the random access preamble that was last used.
  • the preamble in the random access preamble group C may indicate that the short-length message 3 or the long-length message 3 adopts the ⁇ binding mode, or does not distinguish the length of the message 3, and indicates that all messages 3 are used. Bind mode transfer.
  • the random access preamble group C can be divided into more than one preamble group, for example, C1 and optionally, the user equipment 40 further includes a processing module 440, configured to configure or obtain a random access preamble group C; Further, the processing module 440 is further configured to save the random access preamble group C.
  • the UE by transmitting the random access preamble in which the transmission mode of the indication message 3 is the TTI binding mode, it is solved that the UE cannot transmit the message 3 in the TTI binding mode, and the random access process cannot be completed in the case of limited power. The problem.
  • the embodiment of the present invention provides a system for message transmission, where the system includes at least a UE, and is configured to send a random access preamble, where the random access preamble indication message 3 transmission mode is a transmission time interval TTI binding mode; The message 3 is transmitted to the network side in the TTI bonding mode.
  • the user equipment in this embodiment may send a random access preamble according to the method provided by other embodiments of the present invention, and details are not described herein again.
  • Embodiment 12 of the present invention provides a system for message transmission, where the system includes at least a network device, configured to receive a random access preamble sent by the UE and a message 3 transmitted by the UE in the TTI binding mode; The UE needs to transmit the message 3 in the TTI bonding mode, and notifies the UE to transmit the message 3 in the TTI bonding mode.
  • the network device in the system is configured to receive a random access preamble sent by the UE, and then determine whether the UE needs to transmit the message 3 in the TTI binding mode, and if yes, notify the UE to use the TTI binding mode to transmit the message 3, and The message 3 transmitted by the UE in the TTI bonding mode is received.
  • the network device in this embodiment may refer to the method provided by the other embodiments of the present invention to determine whether the UE needs to use the TTI binding mode to transmit the message 3 and the specific method for informing the UE to use the TTI binding mode to transmit the message 3.
  • the network side when the network side determines that the UE needs to transmit the message 3 in the TTI binding mode, the network sends a random access response message carrying the indication information to the UE, which solves the problem that the UE cannot transmit the message 3 in the TTI binding mode.
  • the problem of random access process cannot be completed under power limitation.
  • the embodiments of the present invention are only described by using the LTE system as an example, and thus the eNB is used as an example of the network side device.
  • the methods provided by the embodiments of the present invention are not limited to the LTE system, and are also applicable to the present invention.
  • Other communication systems that transmit message 3 in the TTI bonding mode, and thus can communicate with the UE using non-eNB network side devices.

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Description

消息传输的方法、 设备及系统 本申请要求于 2009年 1月 5日提交中国专利局、 申请号为 CN 200910003437.X, 发明名称为 "消息传输的方法、 网络设备、 用户设备及系统", 以及于 2009年 2月 26 日提交中国专利局、 申请号为 CN 200910119914.9、发明名称为"消息传输的方法、 网络 设备、 用户设备及系统"的中国专利申请的优先权, 其全部内容通过引用结合在本申请 中。 技术领域 本发明涉及通信领域, 特别涉及一种消息传输的方法、 设备及系统。 背景技术 长期演进(Long Term Evolution, LTE)系统中,混合自动重传请求(Hybrid automatic retransmission request, HARQ )机制用于增强无线链路传输效率。在频分双工( Frequency Division Duplex, FDD)模式下, 存在 8个并行传输的 HARQ进程, 每个 HARQ进程 对应的传输时隙为一个传输时间间隔 (Transmission Time Interval, TTI)。
LTE系统中, 小区边缘的用户可以采用 TTI绑定 (TTI bundling)模式进行上行链 路传输, 即连续的多个 TTI同时传输同一数据, 从而提高传输增益。上述一组连续传输 的多个 TTI被称为 TTI bundle,连续传输的 TTI的个数称为 TTI绑定的大小(Bundle size), 上述同时传输的同一数据实际为同一数据的多个不同版本,即同一数据经编码后生成的 多个具有不同纠错能力的数据块。 当采用 TTI绑定模式时, 同一个 TTI bundle中的 TTI 对应同一个 HARQ进程进行传输。
LTE系统中, UE在竞争模式的随机接入过程中发送的消息 3 指随机接入过程中 HARQ传输的第一条上行消息, 或者是随机接入过程中上行传输的第二条消息,或者是 无线资源配置 (Radio Resource Configuration, RRC)连接建立请求消息, 或者是 RRC 连接重建请求消息。
现有的技术方案中, 用户设备(User Equipment, UE)在功率受限情况下无法完成 随机接入过程。 发明内容
本发明实施例提供了一种消息传输的方法、 网络设备、 用户设备及系统。所述技术 方案如下:
本发明实施例提供了一种消息传输的方法, 所述方法包括:
接收用户设备 UE发送的随机接入前导;
确定所述 UE需采用传输时间间隔 TTI绑定模式传输消息 3, 并通知所述 UE采用 所述 TTI绑定模式传输消息 3;
接收所述 UE采用所述 TTI绑定模式传输的消息 3。
本发明实施例提供了一种消息传输的方法, 所述方法包括:
发送随机接入前导;
获取指示信息, 所述指示信息指示采用传输时间间隔 TTI绑定模式传输消息 3; 采用所述 TTI绑定模式传输消息 3。
本发明实施例提供了一种网络设备, 所述网络设备包括: 接收模块、确定模块和通 知模块; 所述接收模块, 用于接收用户设备 UE发送的随机接入前导; 还用于接收所述 UE采用传输时间间隔 TTI绑定模式传输的消息 3;
所述确定模块, 用于确定所述 UE需采用所述 TTI绑定模式传输消息 3时, 触发通 知模块;
所述通知模块, 用于收到所述确定模块的触发后, 通知所述 UE采用所述 TTI绑定 模式传输消息 3。
本发明实施例提供了一种用户设备, 所述用户设备包括: 发送模块和获取模块; 其中, 所述发送模块, 用于发送随机接入前导及消息 3;
所述获取模块,用于获取指示采用传输时间间隔 TTI绑定模式传输消息 3的指示消 息。
本发明实施例提供了一种消息传输的方法, 所述方法包括:
发送随机接入前导,所述随机接入前导指示消息 3传输模式为传输时间间隔 TTI绑 定模式;
采用所述 TTI绑定模式传输消息 3。
本发明实施例提供了一种用户设备, 所述用户设备包括: 发送模块;
所述发送模块, 用于发送随机接入前导, 所述随机接入前导指示消息 3传输模式为 传输时间间隔 TTI绑定模式; 还用于采用所述 TTI绑定模式传输消息 3。
本发明实施例提供了一种消息传输的系统, 所述系统至少包括用户设备 UE; 所述 UE用于发送随机接入前导, 所述随机接入前导指示消息 3传输模式为传输时 间间隔 TTI绑定模式; 还用于采用所述 TTI绑定模式向网络设备传输消息 3。
本发明实施例提供了一种消息传输的系统, 所述系统至少包括网络设备; 所述网络设备用于接收用户设备 UE发送的随机接入前导和 UE采用所述传输时间 间隔 TTI绑定模式传输的消息 3; 还用于确定所述 UE需采用所述 TTI绑定模式传输消 息 3, 并通知所述 UE采用所述 TTI绑定模式传输消息 3。
本发明实施例通过发送指示消息 3传输模式为 TTI绑定模式的随机接入前导,或者 网络侧确定需要 UE采用 TTI绑定模式传输消息 3时, 通知 UE采用 TTI绑定模式传输 消息 3, 能够解决 UE不能采用 TTI绑定模式传输消息 3而导致在功率受限情况下无法 完成随机接入过程的问题。
附图说明 图 1是本发明实施例 1提供的一种消息传输的方法流程示意图;
图 2是本发明实施例 4提供的一种网络设备结构示意图;
图 3是本发明实施例 5提供的一种用户设备结构示意图;
图 4是本发明实施例 6提供的一种消息传输的方法流程示意图;
图 5是本发明实施例 8提供的一种消息传输的方法流程示意图;
图 6是本发明实施例 8提供的前导组划分的示意图。
图 7是本发明实施例 9提供的一种消息传输的方法流程示意图;
图 8是本发明实施例 10提供的一种用户设备结构示意图。 具体实施方式 下面将结合本发明实施例中的附图, 对本发明实施例中的技术方案进行清楚、完整 地描述, 显然, 所描述的实施例仅是本发明的一部分实施例, 而不是全部的实施例。 基 于本发明中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有 其他实施例, 都属于本发明保护的范围。
LTE系统中, 在竞争接入模式时, 闲置状态的 UE没有 eNB为其配置的 TTI绑定 资源, 而如果 UE采用 eNB无法获知的 TTI绑定模式接入,会导致上行传输冲突; 对于 连接状态的 UE, eNB也无法通过前导消息获知 UE是否配置 TTI绑定或为其分配 TTI 绑定资源。 因此, UE在竞争模式的随机接入过程中采用 TTI绑定模式发送消息 3将导 致无法完成随机接入过程。 本发明实施例当最大发射功率小于网络侧接收功率门限时, 通过发送指示消息 3传输模式为 TTI绑定模式的随机接入前导, 或者网络侧确定需要 UE采用 TTI绑定模式传输消息 3时,通知 UE采用 TTI绑定模式传输消息 3,能够解决 UE不能采用 TTI绑定模式传输消息 3而导致在功率受限情况下无法完成随机接入过程 的问题。
参见图 1,本发明实施例 1提供了一种消息传输的方法,该方法可以包括如下步骤: S101 : 接收 UE发送的随机接入前导;
S102: 确定该 UE需采用 TTI绑定模式传输消息 3, 并通知 UE, 采用 TTI绑定模 式传输消息 3;
S103 : 接收该 UE采用 TTI绑定模式传输的消息 3。
本发明实施例中, 网络侧在确定需要 UE采用 TTI绑定模式传输消息 3时, 通知 UE采用 TTI绑定模式传输消息 3,解决了 UE不能采用 TTI绑定模式传输消息 3而导致 在功率受限情况下无法完成随机接入过程的问题。 本发明实施例 2提供了一种消息传输的方法, 该方法可以包括如下步骤。
S201 : UE向 eNB发送随机接入前导。
其中, 现有技术中 UE发送随机接入前导的过程均适用于本步骤, 此处不再赘述。 S202: eNB接收该随机接入前导, 并确定该 UE需采用 TTI绑定模式传输消息 3。 本步骤中, eNB可以预设确定 UE需采用 TTI绑定模式传输消息 3的条件, 当实际 测量值满足预设的条件时, 执行 S203。 例如, eNB可以预设随机前导信号强度的门限 A1和 /或时间提前量(Timing Advance)的门限 Bl, 当 eNB接收的随机前导信号强度小 于预设门限 A1时, 和 /或时间提前量大于预设门限 B1时, eNB确定 UE需采用 TTI绑 定模式传输消息 3, 并执行 S203。
S203: eNB通知 UE可采用 TTI绑定模式传输消息 3。
本步骤中, eNB可以向 UE发送指示信息, 该指示信息用于通知 UE可采用 TTI绑 定模式传输消息 3。进一步的,该指示信息可以包含在 eNB发送的随机接入响应消息中。 具体的, 指示信息可以占用随机接入响应消息的预留位, 或者随机接入响应消息中上行 链路授权信息字段(UL grant)的预留位。例如, 该预留位为 0时, 表示 UE可采用 TTI 绑定模式传输消息 3; 该预留位为 1或 null时, 表示 UE不可采用 TTI绑定模式传输消 息 3。 还可以在随机接入响应消息中新增一个字段用于携带指示信息, 例如, 新增字段 为 1时, 表示 UE可采用 TTI绑定模式传输消息 3; 新增字段为 0或 null或不存在时, 表示 UE不可采用 TTI绑定模式传输消息 3。
S204: 接收 UE采用 ΤΤΙ绑定模式传输的消息 3。
本实施例中, eNB确定 UE需采用 ΤΤΙ绑定模式传输消息 3时, 会分配 UE可以采 用 TTI绑定传输模式传输消息的资源, 即该 TTI绑定模式传输资源在时域上是连续的。
本发明实施例中, eNB在确定需要 UE采用 TTI绑定模式传输消息 3时, 通知 UE 采用 TTI绑定模式传输消息 3, 解决了 UE不能采用 TTI绑定模式传输消息 3而导致在 功率受限情况下无法完成随机接入过程的问题。 本发明实施例 3提供了一种消息传输的方法, 该方法包括:
S301 : 发送随机接入前导;
S302: 接收指示信息, 该指示信息指示可采用 TTI绑定模式传输消息 3;
S303 : 采用 TTI绑定模式传输消息 3。
本实施例的 S302可以进一步包括: UE接收随机接入响应消息,并读取该消息包含 的指示信息; 可选的, 该指示信息可以为该消息的新增字段或预留位, 或该消息中上行 链路授权信息字段的预留位。
本实施例的 S302和 S303之间可以进一步包括 S302' :接收 TTI绑定模式传输资源, 即 UE可以采用 TTI绑定传输模式传输消息 3的资源,则在 S303中, UE利用该资源进 行消息 3的传输。
本发明实施例中, 网络侧即 eNB在确定需要 UE采用 TTI绑定模式传输消息 3时, 通知 UE采用 TTI绑定模式传输消息 3, 解决了 UE不能采用 TTI绑定模式传输消息 3 而导致在功率受限情况下无法完成随机接入过程的问题。 参见图 2, 本发明实施例 4提供了一种网络设备 20, 该网络设备 20包括: 接收模 块 210、 确定模块 220和通知模块 230。 其中, 接收模块 210用于接收 UE发送的随机 接入前导以及 UE采用 TTI绑定模式传输的消息 3 ; 确定模块 220用于确定 UE需采用 TTI绑定模式传输消息 3时, 触发通知模块 230; 通知模块 230用于收到确定模块 220 的触发后, 通知 UE采用 TTI绑定模式传输消息 3。
进一步的, 确定模块 220还可以用于保存或获取确定 UE需采用 TTI绑定模式传输 消息 3的预设条件, 当实际测量值满足预设条件时, 触发通知模块 230。 例如, 确定模 块 220保存的预设条件为预设随机前导信号强度的门限 A1 和 /或时间提前量(Timing Advance)的门限 Bl, 当确定模块 220确定接收模块 210接收的随机接入前导信号强度 小于预设门限 Al时, 和 /或时间提前量大于预设门限 B1时, 确定 UE需采用 TTI绑定 模式传输消息 3, 触发通知模块 230。
进一步的, 通知模块 230可以用于发送指示信息, 该指示信息用于通知 UE可采用 TTI绑定模式传输消息 3。
本发明实施例中, 网络侧在确定需要 UE采用 TTI绑定模式传输消息 3时, 通知
UE采用 TTI绑定模式传输消息 3,解决了 UE不能采用 TTI绑定模式传输消息 3而导致 在功率受限情况下无法完成随机接入过程的问题。 参见图 3, 本发明实施例 5提供了一种用户设备 30, 该用户设备 30包括: 发送模 块 310和获取模块 320。 其中, 发送模块 310用于发送随机接入前导及消息 3; 获取模 块 320用于获取指示可采用 TTI绑定模式传输消息 3的指示信息。
进一步的, 获取模块 320可以用于接收随机接入响应消息, 并读取占用该消息的预 留位, 或占用该消息包含的上行链路授权信息字段的预留位, 或占用该消息的新增字段 的指示信息。
本发明实施例中, 网络侧在确定需要 UE采用 TTI绑定模式传输消息 3时, 通知
UE采用 TTI绑定模式传输消息 3,解决了 UE不能采用 TTI绑定模式传输消息 3而导致 在功率受限情况下无法完成随机接入过程的问题。 参见图 4,本发明实施例 6提供了一种消息传输的方法,该方法可以包括如下步骤: S401 : 发送随机接入前导; 该随机接入前导指示消息 3传输模式为 TTI绑定模式;
S402: 采用 TTI绑定模式传输消息 3。
本发明实施例中,通过向网络侧发送指示消息 3传输模式为 TTI绑定模式的随机接 入前导, 解决了 UE不能采用 TTI绑定模式传输消息 3而导致在功率受限情况下无法完 成随机接入过程的问题。 本发明实施例 7提供了一种消息传输的方法, 该方法可以包括如下步骤:
S401 ': 当最大发射功率小于网络侧接收功率门限时, 和 /或当最大发射功率与路损 之和小于网络侧接收功率门限时, 和 /或当 UE已经采用 TTI绑定模式进行上行传输时, 发送随机接入前导; 该随机接入前导指示消息 3传输模式为 TTI绑定模式。
本领域技术人员可以理解的,最大发射功率与路损之和小于网络侧接收功率门限可 以包括如下情况: UE采用最大发射功率发送时, 仍不能达到网络侧期望的接收功率。 其中, 网络侧期望的接收功率为网络侧能够成功接收的功率。 此外, 后文仅以最大发射 功率小于网络侧接收功率门限条件为例进行介绍的,本发明实施例同样适用于最大发射 功率与路损之和小于网络侧接收功率门限的情况。
S402': 采用 TTI绑定模式传输消息 3。
本发明实施例中, 当 UE的最大发射功率都小于网络侧接收功率门限时,和 /或当最 大发射功率与路损之和小于网络侧接收功率门限时,和 /或当 UE已经采用 TTI绑定模式 进行上行传输时, 向网络侧发送指示消息 3传输模式为 TTI绑定模式的随机接入前导, 解决了 UE不能采用 TTI绑定模式传输消息 3而导致在功率受限情况下无法完成随机接 入过程的问题。 参见图 5,本发明实施例 8提供了一种消息传输的方法,该方法可以包括如下步骤。
S501 :配置随机接入前导组 C,该随机接入前导组 C包含多于一个指示消息 3传输 模式为 TTI绑定模式的随机接入前导。
例如, 预设随机接入前导组 C中前导的取值范围是 50-60, 或者预设随机接入前导 组 C中前导的下限为 50, 该随机接入前导组 C包括 50-63的前导, 共 14个。
S502: 从该随机接入前导组 C选取用于发送的随机接入前导。
本步骤中,选取的随机接入前导可以是从随机接入前导组 C内随机选择的,还可以 是根据预设规则进行组内选择的,例如,优先选择组内已用次数最少、或已用概率最低、 或上一次采用的随机接入前导。
进一步的,随机接入前导组 C中的前导可以指示对长度较短的消息 3或长度较长的 消息 3采用 TTI绑定模式, 或者, 不区分消息 3的长度, 指示对所有消息 3采用 TTI 绑定模式传输。进一步的, 随机接入前导组 C可以分为多于一个的前导组, 例如随机接 入前导组 C1和随机接入前导组 C2。
S503 : 检测最大发射功率是否达到网络侧接收功率门限, 如果达到, 则执行 S504; 否则, 执行 S505。
S504: 发送随机接入前导, 并采用非 TTI绑定模式传输消息 3; 该随机接入前导不 属于 S501预设的随机接入前导组 C。
可选的, 如果在 S501中还预设了随机接入前导组 A和 /或随机接入前导组 B, 该随 机接入前导组 A和 /或随机接入前导组 B内的随机接入前导用于指示消息 3传输模式为 非 TTI绑定模式,则在本步骤中发送的随机接入前导可以为该随机接入前导组 A或随机 接入前导组 B的随机接入前导。 S505 :发送在随机接入前导组 C中选取随机接入前导,并采用 TTI绑定模式发送消 息 3。
相应的, 网络侧在接收到随机接入前导组 C 中的前导时, 可以获知 UE请求采用 TTI绑定模式传输消息, 可以进一步为该 UE分配 TTI绑定模式传输资源, 还可以通知 UE为其分配了 TTI绑定模式传输资源; UE可以采用该分配的资源发送消息 3。
本实施例中, 可以在 S501 中预设仅包含一个随机接入前导的随机接入前导组 C, 则在 S505中可以直接发送该随机接入前导而无需执行组内选择。
本实施例中, 可以将随机接入前导分为三组, 随机接入前导组八、 B和 C, 随机接 入前导组 A用于传输长度较短的消息 3,随机接入前导组 B用于传输长度较长的消息 3, 随机接入前导组 C用于指示消息 3传输模式为 TTI绑定模式。
本实施例中的 S501的替代方案可以是: 接收网络侧 (如演进基站 eNB )发送的前 导分组消息,通过该消息可以获取随机接入前导组 C中前导的取值范围,该随机接入前 导组 C中的随机接入前导指示消息 3传输模式为 TTI绑定模式。
其中,可以通过前导分组消息直接获取随机接入前导组 C的取值范围,也可以根据 随机接入前导的总数量、 随机接入前导组 A的数量和随机接入前导组 B的数量计算随 机接入前导组 C中前导的取值范围。
本实施例中的 S501的替代方案还可以是: 接收网络侧发送的 RRC消息, 获取其包 含的随机接入前导组 C的取值范围。
例如, 该消息包括随机接入前导的总数量 N^amWe、 随机接入前导组 A中前导的数 量 和随机接入前导组 B中前导的数量 NB, 随机接入前导组 C中前导的数量 Nc为 Npreambie- NA - NB, 随机接入前导组 C中前导的取值下限为 NA + NB -\ , 即随机接入前导 组 C中前导的取值范围是 N4 + Ns -1至 Np ambl -\。
本领域技术人员可以理解的, 随机接入前导组的前导取值下限、前导的数量和前导 的范围具有换算关系, 可以根据其中一个的取值计算另外两个的取值。
需要指出的是, 如果所有的前导共分为多于三组的随机接入前导组, 则计算随机接 入前导组 C中前导的数量与上述方法类似, 可以依次类推, 不再赘述。 此外, 如果所有的前导共分为随机接入前导组 A和随机接入前导组 C两组, 则当 前导分组消息包含一个随机接入前导组 A 中前导的数量时, 可以根据上述方法计算出 Nc^ Npreamble - NA; 当前导分组消息包含随机接入前导组 C的数量时, 随机接入前导组 C中前导的取值范围可以是 Nc -l到 w -l,当然,在所有的前导共分为两组的时候, 随机接入前导组 C中前导的取值范围还可以是 0至 Nc -1, 采用哪种取值范围可以根据 协议或协商确定。
需要说明的是, 本实施例中 S501及其替代方法是可选步骤, 随机前导组 C可以是 根据协议设定好的或者 UE已保存的信息, 而无需进行配置或获取。 进一步的, UE配 置或获取到该随机接入前导 C之后, 可以保存或更新已保存的随机接入前导组 C。
进一步的,如果所有的前导划分为包括随机接入前导组 C在内的至少两个随机接入 前导组, 则在 S502之前, 本实施例还可以包括: 选择该随机接入前导组 C; 和 /或, 在 S504之前, 本实施例还可以包括: 选择随机接入前导组 A和 /或8。 进一步的, 如果该 随机接入前导组 C包括随机接入前导组 C1和随机接入前导组 C2, 则 S502之前, 本实 施例还可以包括:选择该随机接入前导组 C中的 C1或 C2。以下详细说明选择随机接入 前导组的过程。
具体的, 设 PL为实际测量的路损,
^c为预设的选择随机接入前导组 C时的路损阈值; β为预设的选择随机接入前 导组 Β时的路损阈值; 贝 ij, UE选择随机接入前导组 C的条件可以是:
(1)待发送的消息 3的长度小于预设阈值且 ^> ^
(2)每次待发送的消息 3的长度均相同且 ^> ^
(3)待发送的消息 3的长度大于预设阈值且 ^^<^<^
具体的, 预设阈值为 80比特, 当消息 3的长度小于 80比特, 则认为该消息长度较 短; 当消息 3的长度大于 80比特, 则认为该消息长度较长。
进一步的, 若存在随机接入前导组八、 Β, 均包含用于指示消息 3传输模式为非 ΤΤΙ 绑定模式的随机接入前导, 则选择随机接入前导组 Α或 Β的条件可以是:
(1) 当待发送的消息 3的长度小于预设阈值 £^< 0:时, 选择随机接入前导组 A;
(2) 当待发送的消息 3的长度大于预设阈值且 ^< ¾时, 选择随机接入前导组 B。
(3) 当待发送的消息 3的长度大于预设阈值且 ^ >^0:时, 选择随机接入前导组
A。
(4) 当每次待发送的消息 3的长度均相同, 且 Ρ£<Ρ 时, 选择随机接入前导组
Α。
进一步的, 若该随机接入前导组 C包括随机接入前导组 C1和随机接入前导组 C2, 设 为预设的选择随机接入前导组 C2时的路损阈值; P^为预设的选择随机接入前 导组 A时的路损阈值; 则选择该随机接入前导组 C中的 C1或 C2的条件可以是:
( 1 ) 当待发送的消息 3的长度大于预设阈值 β < Ρ£ < Ρ£ , 选择随机接入前导 组 C2;
(2)当待发送的消息 3的长度小于预设阈值且 ^ > ^,选择随机接入前导组 C1 ; (3 ) 当待发送的消息 3的长度大于预设阈值且 < Ρ£β, 选择随机接入前导组 Β;
(4) 当待发送的消息 3的长度大于预设阈值且 ^ c^P P ^, 选择随机接入前导 组八。
需要指出的是,选择随机接入前导组和随机接入前导组内选取前导可以为相互独立 的两个步骤, 也可以融合为一个步骤, 即一次性执行前导组和前导的选择。 例如, 参见 图 6, 为随机接入前导组 C包括 C1和 C2时前导组划分的示意图; 当 PL < Ρ£β时, 从随机 接入前导组 Β中选取一个前导; 当 PL在尸 和 C2之间时,从随机接入前导组 C2中选取 一个前导; 随机接入前导组 B和 C2表示待发送的消息 3的长度大于预设阈值; 当路损在 2和尸 之间时, 从随机接入前导组 A中选取一个前导; 当路损大于 P ^时, 从随机接 入前导组 C1中选取一个前导, 随机接入前导组 A和 C1表示待发送的消息 3的长度小于预 设阈值。 本实施例中, 随机接入前导组 C可以用于同时支持不同长度的消息 3, 其前导分配信 息通过系统消息进行广播, 对每个随机接入前导组的取值范围进行配置, 同时指示是否 支持不同大小消息的传输以及消息功率偏移。 本发明实施例中, 当最大发射功率小于网络侧接收功率门限时, 通过发送指示消息 3传输模式为 TTI绑定模式的随机接入前导, 解决了 UE不能采用 TTI绑定模式传输消 息 3而导致在功率受限情况下无法完成随机接入过程的问题。 参见图 7,本发明实施例 9提供了一种消息传输的方法,该方法可以包括如下步骤: S601 :配置随机接入前导组 C,该随机接入前导组 C包含多于一个指示消息 3传输 模式为 TTI绑定模式的随机接入前导;
S602: 从该随机接入前导组 C选取用于发送的随机接入前导;
本步骤中,选取的随机接入前导可以是从随机接入前导组 C内随机选择的,还可以 是根据预设规则进行组内选择的,例如,优先选择组内已用次数最少、或已用概率最低、 或上一次采用的随机接入前导。 进一步的,随机接入前导组 C中的前导可以指示对长度较短的消息 3或长度较长的 消息 3采用 TTI绑定模式, 或者, 不区分消息 3的长度, 指示对所有消息 3采用 TTI 绑定模式传输。进一步的, 随机接入前导组 C可以分为多于一个的前导组, 例如随机接 入前导组 C1和随机接入前导组 C2。
S603 :发送在随机接入前导组 C中选取随机接入前导,并采用 TTI绑定模式发送消 息 3。
本步骤中, 当 UE本身处于连接态并已经采用 TTI绑定模式进行上行数据传输时, 或当 UE检测到信号强度较弱时,在随机接入前导组 C中选取随机接入前导发送给网络 需要指出的是, 如果 UE已经启动了 TTI绑定模式, 在上行数据到达需要新的调度 资源时, UE可能会发起随机接入过程, 由于 UE已经采用了 TTI绑定模式进行传输, 因此,在进行随机接入前导选择时,可以直接在随机接入前导组 C中选取随机接入前导 发送给网络侧。
相应的, 网络侧在接收到随机接入前导组 C 中的前导时, 可以获知 UE请求采用 TTI绑定模式传输消息, 可以进一步为该 UE分配 TTI绑定模式传输资源, 还可以通知 UE为其分配了 TTI绑定模式传输资源; UE可以采用该分配的资源发送消息 3。
本实施例中, 可以在 S601 中预设仅包含一个随机接入前导的随机接入前导组 C, 则在 S505中可以直接发送该随机接入前导而无需执行组内选择。
本实施例中的 S601的替代方案可以是: 接收网络侧 (如演进基站 eNB )发送的前 导分组消息,通过该消息可以获取随机接入前导组 C中前导的取值范围,该随机接入前 导组 C中的随机接入前导指示消息 3传输模式为 TTI绑定模式。
其中,可以通过前导分组消息直接获取随机接入前导组 C的取值范围,也可以根据 随机接入前导的总数量、 随机接入前导组 A的数量和随机接入前导组 B的数量计算随 机接入前导组 C中前导的取值范围。
本实施例中的 S601的替代方案还可以是: 接收网络侧发送的 RRC消息, 获取其包 含的随机接入前导组 C的取值范围。
例如, 该消息包括随机接入前导的总数量 N^amWe、 随机接入前导组 A中前导的数 量 N4和随机接入前导组 B中前导的数量 NB, 随机接入前导组 C中前导的数量 Nc为 Npreamble- NA - NB, 随机接入前导组 C中前导的取值下限为 NA + NB -\ , 即随机接入前导 组 C中前导的取值范围是 + ΝΒ Λ至 Npreambl -1。
本领域技术人员可以理解的, 随机接入前导组的前导取值下限、前导的数量和前导 的范围具有换算关系, 可以根据其中一个的取值计算另外两个的取值。
需要指出的是, 如果所有的前导共分为多于三组的随机接入前导组, 则计算随机接 入前导组 C中前导的数量与上述方法类似, 可以依次类推, 不再赘述。
此外,如果所有的前导共分为随机接入前导组 A和随机接入前导组 C两组,则当前 导分组消息包含一个随机接入前导组 A中前导的数量时, 可以根据上述方法计算出 Nc % Npreamble - ΝΑ·, 当前导分组消息包含随机接入前导组 C的数量时, 随机接入前导组 C 中前导的取值范围可以是 Nc -l到
Figure imgf000014_0001
-l, 当然, 在所有的前导共分为两组的时候, 随机接入前导组 C中前导的取值范围还可以是 0至 Nc -1, 采用哪种取值范围可以根据 协议或协商确定。
需要说明的是, 本实施例中 S601及其替代方法是可选步骤, 随机前导组 C可以是 根据协议设定好的或者 UE已保存的信息, 而无需进行配置或获取。 进一步的, UE配 置或获取到该随机接入前导 C之后, 可以保存或更新已保存的随机接入前导组 C。
进一步的, 若该随机接入前导组 C包括随机接入前导组 C1和随机接入前导组 C2, 则选择该随机接入前导组 C中的 C1或 C2的条件可以是:
( 1 ) 当待发送的消息 3的长度大于预设阈值, 选择随机接入前导组 C2;
(2) 当待发送的消息 3的长度小于预设阈值, 选择随机接入前导组 C1 ;
需要指出的是, 选择随机接入前导组和随机接入前导组内选取前导可以为相互独立 的两个步骤, 也可以融合为一个步骤, 即一次性执行前导组和前导的选择。 本实施例中, 随机接入前导组 C可以用于同时支持不同长度的消息 3, 其前导分配信 息通过系统消息进行广播, 对每个随机接入前导组的取值范围进行配置, 同时指示是否 支持不同大小消息的传输以及消息功率偏移。 本发明实施例中, 通过发送指示消息 3传输模式为 TTI绑定模式的随机接入前导, 解决了 UE不能采用 TTI绑定模式传输消息 3而导致在功率受限情况下无法完成随机接 入过程的问题。 如图 8所示, 本发明实施例 10提供了一种用户设备 40, 该用户设备包括发送模块 410, 其中, 发送模块 410用于发送随机接入前导, 该随机接入前导指示消息 3传输模 式为传输时间间隔 TTI绑定模式, 发送模块 410还用于采用 TTI绑定模式传输消息 3。
相应的, 网络侧在接收到随机接入前导组 C 中的前导时, 可以获知 UE请求采用 TTI绑定模式传输消息, 则为该 UE分配 TTI绑定模式传输资源, 可选的, 网络侧可以 通知 UE为其分配了 TTI绑定模式传输资源。
可选的,该用户设备 40还包括触发模块 420,用于当 UE已经采用 ΤΤΙ绑定模式进 行上行传输, 和 /或, 当最大发射功率小于网络侧接收功率门限时, 和 /或当 UE 已经采 用 ΤΤΙ绑定模式进行上行传输时, 触发上述发送模块 410。
可选的, 该用户设备 40还包括选取模块 430, 用于在随机接入前导组 C中选取用 于发送的随机接入前导,该随机接入前导组 C包含多于一个指示消息 3传输模式为 ΤΤΙ 绑定模式的随机接入前导。
具体的,选取的随机接入前导可以是从随机接入前导组 C内随机选择的,还可以是 根据预设规则进行组内选择的, 例如, 优先选择组内已用次数最少、 或已用概率最低、 或上一次采用的随机接入前导。
进一步的,随机接入前导组 C中的前导可以指示对长度较短的消息 3或长度较长的 消息 3采用 ΤΤΙ绑定模式, 或者, 不区分消息 3的长度, 指示对所有消息 3采用 ΤΤΙ 绑定模式传输。 进一步的, 随机接入前导组 C可以分为多于一个的前导组, 例如 C1和 可选的,该用户设备 40还包括处理模块 440,用于配置或获取用于随机接入前导组 C; 进一步的, 该处理模块 440还可以用于保存该随机接入前导组 C。
本发明实施例中, 通过发送指示消息 3传输模式为 TTI绑定模式的随机接入前导, 解决了 UE不能采用 TTI绑定模式传输消息 3而导致在功率受限情况下无法完成随机接 入过程的问题。
本发明实施例 11提供了一种消息传输的系统,该系统至少包括 UE,用于发送随机 接入前导, 该随机接入前导指示消息 3传输模式为传输时间间隔 TTI绑定模式; 还用于 采用 TTI绑定模式向网络侧传输消息 3。 本实施例中的用户设备可以参照本发明其他实 施例提供的方法发送随机接入前导, 此处不再赘述。
本发明实施例中, 通过发送指示消息 3传输模式为 TTI绑定模式的随机接入前导, 解决了 UE不能采用 TTI绑定模式传输消息 3而导致在功率受限情况下无法完成随机接 入过程的问题。 本发明实施例 12提供了一种消息传输的系统, 该系统至少包括网络设备, 用于接 收 UE发送的随机接入前导和 UE采用该 TTI绑定模式传输的消息 3 ; 还用于确定上述 UE需采用 TTI绑定模式传输消息 3, 并通知该 UE采用 TTI绑定模式传输消息 3。 具体的, 该系统中的网络设备用于接收 UE发送的随机接入前导, 然后确定 UE是 否需采用 TTI绑定模式传输消息 3, 如果是, 则通知 UE采用 TTI绑定模式传输消息 3, 并接收 UE采用 TTI绑定模式传输的消息 3。 本实施例中的网络设备可以参照本发明其 他实施例提供的方法确定 UE是否需采用 TTI绑定模式传输消息 3以及通知 UE采用 TTI 绑定模式传输消息 3的具体方法, 此处不再赘述。
本发明实施例中, 网络侧在确定需要 UE采用 TTI绑定模式传输消息 3时, 向 UE 发送携带指示信息的随机接入响应消息, 解决了 UE不能采用 TTI绑定模式传输消息 3 而导致在功率受限情况下无法完成随机接入过程的问题。
需要特别指出的是,本发明各实施例仅以 LTE系统为例进行说明,并因此采用 eNB 作为网络侧设备的举例, 但本发明各实施例提供的方法并不限于 LTE系统, 还适用于 存在 TTI绑定模式下传输消息 3的其他通信系统, 并因此可以采用非 eNB的网络侧设 备与 UE进行通信。
本领域普通技术人员可以理解实现上述实施例方法中的全部或部分步骤是可以通 过程序来指令相关的硬件来完成, 该的程序可以存储于一计算机可读取存储介质中, 所 述的存储介质, 如: ROM/RAM、 磁碟、 光盘等。
以上仅是本发明的优选实施方式,应当指出,对于本技术领域的普通技术人员来说, 在不脱离本发明原理的前提下, 还可以作出若干改进和润饰, 这些改进和润饰也应视为 本发明的保护范围。

Claims

权利要求
1. 一种消息传输的方法, 其特征在于, 所述方法包括:
发送随机接入前导,所述随机接入前导指示消息 3传输模式为传输时间间隔 TTI绑定 模式;
采用所述 TTI绑定模式传输消息 3。
2. 根据权利要求 1所述的方法, 其特征在于, 所述发送随机接入前导包括: 当用户设备 UE已经采用所述 TTI绑定模式进行上行传输,和 /或当最大发射功率小于 网络侧接收功率门限时, 和 /或当最大发射功率与路损之和小于网络侧接收功率门限时, 发送随机接入前导。
3. 根据权利要求 1或 2所述的方法, 其特征在于, 发送随机接入前导之前, 还包括: 从随机接入前导组 C中选取用于发送的随机接入前导, 所述随机接入前导组 C包含 多于一个指示消息 3传输模式为所述 TTI绑定模式的随机接入前导。
4. 根据权利要求 3所述的方法, 其特征在于, 所述从随机接入前导组 C中选取用于 发送的随机接入前导之前, 还包括: 配置所述随机接入前导组 C; 或者, 获取所述随机 接入前导组 C; 或者, 保存所述随机接入前导组 C;
其中, 所述获取随机接入前导组 C包括: 获取前导分组消息或无线资源配置 RRC消 息包含的所述随机接入前导组 C中的前导取值范围; 或者, 获取前导分组消息, 包含的 随机前导的总数量、 随机接入前导组 A的数量和随机接入前导组 B的数量, 并计算所述 随机接入前导组 C的取值范围。
5. 根据权利要求 3或 4所述的方法, 其特征在于, 所述从随机接入前导组 C中选取用 于发送的随机接入前导包括:
当待发送的消息 3的长度小于预设阈值且 P ^ ^c时, 或当每次待发送的消息 3的长 度均相同且 P ^ ^c时, 或当待发送的消息 3的长度大于预设阈值且 ^ < < ^0:时, 从所述随机接入前导组 C中选取用于发送的随机接入前导;
其中, 设 为实际测量的路损, ^c为预设的选择所述随机接入前导组 C时的路损 阈值; ¾为预设的选择所述随机接入前导组 B时的路损阈值。
6. 根据权利要求 3或 4所述的方法, 其特征在于, 所述从随机接入前导组 C中选取用 于发送的随机接入前导包括:
所述随机接入前导组 C包含随机接入前导组 C1和随机接入前导组 C2; 当待发送的消息 3的长度大于预设阈值且 Ρ£Β < < PLC2, 从所述随机接入前导组 C2中选取用于发送的随机接入前导; 或,
当待发送的消息 3的长度小于预设阈值且 > Ρ£ 从所述随机接入前导组 C1中选 取用于发送的随机接入前导;
其中, 为实际测量的路损, C2为预设的选择所述随机接入前导组 C2时的路损阈 值, P ^为预设的选择所述随机接入前导组 A时的路损阈值; ^为预设的选择所述随机 接入前导组 B时的路损阈值。
7. 根据权利要求 3或 4所述的方法, 其特征在于, 所述从随机接入前导组 C中选取用 于发送的随机接入前导包括:
所述随机接入前导组 C包含随机接入前导组 C1和随机接入前导组 C2 ;
当待发送的消息 3的长度大于预设阈值时, 从所述随机接入前导组 C2中选取用于发 送的随机接入前导; 或者,
当待发送的消息 3的长度小于预设阈值时, 从所述随机接入前导组 C 1中选取用于发 送的随机接入前导。
8. 根据权利要求 3或 4所述的方法, 其特征在于, 所述从随机接入前导组 C中选取用 于发送的随机接入前导包括:
从所述随机接入前导组 C中随机选取或根据预设规则选取一个前导作为用于发送的 随机接入前导。
9. 一种用户设备, 其特征在于, 所述用户设备包括发送模块;
所述发送模块用于发送随机接入前导, 所述随机接入前导指示消息 3传输模式为传 输时间间隔 TTI绑定模式; 所述发送模块还用于采用所述 TTI绑定模式传输消息 3。
10. 根据权利要求 9所述的用户设备, 其特征在于, 所述用户设备还包括触发模块; 所述触发模块用于当用户设备 UE已经采用 TTI绑定模式进行上行传输,和 /或, 当最 大发射功率小于网络侧接收功率门限时,和 /或当最大发射功率与路损之和小于网络侧接 收功率门限时, 触发所述发送模块。
1 1 . 根据权利要求 9或 10所述的用户设备, 其特征在于, 所述用户设备还包括选取 模块;
所述选取模块用于从随机接入前导组 C中选取用于发送的随机接入前导, 所述随机 接入前导组 C包含多于一个指示消息 3传输模式为所述 TTI绑定模式的随机接入前导。
12.根据权利要求 1 1所述的用户设备,其特征在于,所述用户设备还包括处理模块; 所述处理模块用于,配置所述随机接入前导组 C,和 /或获取所述随机接入前导组 C, 和 /或保存所述随机接入前导组 C。
13. 一种消息传输的系统, 其特征在于, 所述系统至少包括用户设备 UE, 所述 UE 用于发送随机接入前导,所述随机接入前导指示消息 3传输模式为传输时间间隔 TTI绑定 模式; 所述 UE还用于采用所述 TTI绑定模式向网络设备传输消息 3。
14. 一种消息传输的方法, 其特征在于, 所述方法包括:
接收用户设备 UE发送的随机接入前导;
确定所述 UE需采用传输时间间隔 TTI绑定模式传输消息 3, 并通知所述 UE采用所述 TTI绑定模式传输消息 3 ;
接收所述 UE采用所述 TTI绑定模式传输的消息 3。
15. 根据权利要求 14所述的方法, 其特征在于, 所述确定 UE需采用 TTI绑定模式传 输消息 3包括:
当所述随机前导信号的强度小于预设门限 A1时, 和 /或时间提前量大于预设门限 B1 时, 确定所述 UE需采用 TTI绑定模式传输消息 3。
16.根据权利要求 14或 15所述的方法,其特征在于,所述通知 UE采用 TTI绑定模式传 输消息 3包括:
发送随机接入响应消息, 所述随机接入响应消息包含用于通知 UE采用 TTI绑定模式 传输消息 3的指示信息。
17.根据权利要求 16所述的方法, 其特征在于,
所述指示信息占用所述随机接入响应消息的预留位,或所述随机响应消息包含的上 行链路授权信息字段的预留位, 或所述随机接入响应消息的新增字段。
18. 一种消息传输的方法, 其特征在于, 所述方法包括:
发送随机接入前导;
获取指示信息, 所述指示信息指示采用传输时间间隔 TTI绑定模式传输消息 3; 采用所述 TTI绑定模式传输消息 3。
19. 根据权利要求 18所述的方法, 其特征在于, 所述获取指示信息包括: 接收随机接入响应消息;
读取占用所述随机接入响应消息的预留位,或占用所述随机响应消息包含的上行链 路授权信息字段的预留位, 或占用所述随机接入响应消息的新增字段的指示信息。
20. 一种网络设备, 其特征在于, 所述网络设备包括: 接收模块、 确定模块和通知 模块; 其中, 所述接收模块用于接收用户设备 UE发送的随机接入前导; 所述确定模块 用于在确定所述 UE需采用所述 TTI绑定模式传输消息 3时, 触发通知模块; 所述通知模 块用于收到所述确定模块的触发后, 通知所述 UE采用所述 TTI绑定模式传输消息 3 ; 所 述接收模块还用于接收所述 UE采用传输时间间隔 TTI绑定模式传输的消息 3。
21. 根据权利要求 20所述的网络设备, 其特征在于, 所述确定模块具体用于, 确定 所述随机前导信号的强度小于预设门限 A1时, 和 /或时间提前量大于预设门限 B1时, 触 发所述通知模块。
22. 根据权利要求 20或 21所述的网络设备, 其特征在于, 所述通知模块具体用于, 发送随机接入响应消息; 所述随机接入响应消息包含用于通知所述 UE采用所述 TTI绑定 模式传输消息 3的指示信息。
23.一种用户设备, 其特征在于, 所述用户设备包括: 发送模块和获取模块; 其中, 所述发送模块用于发送随机接入前导; 所述获取模块用于获取指示采用传输时间间隔 TTI绑定模式传输消息 3的指示消息;所述发送模块还用于在所述获取模块获取指示消息 后, 采用所述传输时间间隔 TTI绑定模式发送消息 3。
24. 根据权利要求 23所述的用户设备, 其特征在于, 所述获取模块具体用于, 接收随机接入响应消息;
读取占用所述随机接入响应消息的预留位,或占用所述随机响应消息包含的上行链 路授权信息字段的预留位, 或占用所述随机接入响应消息的新增字段的指示信息。
25. 一种消息传输的系统, 其特征在于, 所述系统至少包括网络设备, 所述网络设 备用于接收用户设备 UE发送的随机接入前导,并确定所述 UE需采用所述 TTI绑定模式传 输消息 3; 所述网络设备还用于通知所述 UE采用所述 TTI绑定模式传输消息 3, 并接收所 述 UE采用所述传输时间间隔 TTI绑定模式传输的消息 3。
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