WO2012139390A1 - Procédé et système pour gérer un canal de transport dédié amélioré - Google Patents

Procédé et système pour gérer un canal de transport dédié amélioré Download PDF

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Publication number
WO2012139390A1
WO2012139390A1 PCT/CN2011/083070 CN2011083070W WO2012139390A1 WO 2012139390 A1 WO2012139390 A1 WO 2012139390A1 CN 2011083070 W CN2011083070 W CN 2011083070W WO 2012139390 A1 WO2012139390 A1 WO 2012139390A1
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WO
WIPO (PCT)
Prior art keywords
time interval
transmission time
terminal
dch
cell
Prior art date
Application number
PCT/CN2011/083070
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English (en)
Chinese (zh)
Inventor
柯雅珠
程翔
Original Assignee
中兴通讯股份有限公司
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Publication of WO2012139390A1 publication Critical patent/WO2012139390A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/02—Selection of wireless resources by user or terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access

Definitions

  • the present invention relates to High Speed Uplink Packet Access (HSUPA) technology, and more particularly to a method and system for processing an enhanced dedicated transport channel.
  • HSUPA High Speed Uplink Packet Access
  • High Speed Uplink Packet Access (HSUPA) technology improves the performance of uplink packet data through techniques such as fast scheduling and physical layer fast retransmission combining.
  • the HSUPA technology introduces a new type of transport channel, the Enhanced Dedicated Transport Channel (E-DCH), which carries user data and is in a single uplink direction.
  • the physical channel carrying the E-DCH is a Physical Random Access Channel (PRACH).
  • PRACH Physical Random Access Channel
  • the two basic modes of operation of the terminal are idle mode and connected mode.
  • the connection mode can be further divided into different states, such as: UM PCH, Universal mobile telecommunication system Radio Access network Register area Paging Channel status, Cell paging channel (CELL PCH, CELL Paging Channel) state, CELL Forward Access Channel (CELL_FACH, CELL Forward Access Channel) state, CELL Dedicated Channel state (CELL-DCH, CELL Dedicated Channel), these states define the physical channels and transmissions that the terminal can use.
  • UM PCH Universal mobile telecommunication system Radio Access network Register area Paging Channel status
  • Cell paging channel CELL PCH, CELL Paging Channel
  • CELL_FACH CELL Forward Access Channel
  • CELL-DCH CELL Dedicated Channel
  • the CELL-FACH state uplink can be used to transmit uplink user data through the E-DCH using HSUPA technology.
  • There are two transmission time intervals of E-DCH one is the transmission time interval of 2 milliseconds, that is, the E-DCH is scheduled to transmit E-DCH data at intervals of 2 milliseconds.
  • This 2 millisecond transmission time interval is called For a short transmission time interval; the other is a transmission time interval of 10 milliseconds, That is, the E-DCH is scheduled to be transmitted in an interval of 10 milliseconds to transmit E-DCH data.
  • This 10 millisecond transmission time interval is called a long transmission time interval.
  • all common E-DCH resources can only be configured as short transmission time intervals, or can only be configured as long transmission time intervals.
  • the network typically tends to choose a scheduling period configured for long transmission time intervals. In this way, terminals with large power headroom are forced to use lower rates to transmit data, and the gains caused by fast scheduling of short transmission time intervals are not available; at the same time, those with more d, power headroom The terminal also cannot benefit from the larger cell edge coverage brought by the scheduling period of the long transmission time interval.
  • the scheduling of the transmission time interval is a primary object of the present invention to provide a method and system for processing an enhanced dedicated transport channel such that a common E-DCH resource in a cell can be used for both short transmission time interval scheduling and long transmission time.
  • the present invention provides a method for processing an enhanced dedicated transport channel, the method comprising: the terminal selecting an enhanced dedicated transport channel (E-DCH) according to a measurement result of the camped cell, selecting a short transmission time interval or a long transmission time interval Resources;
  • E-DCH enhanced dedicated transport channel
  • the terminal notifies the node B of the transmission time interval information selected by the terminal by scrambling different scrambling codes for the preamble portion of the physical random access channel (PRACH) carrying the E-DCH.
  • the method further includes:
  • the terminal performs E-DCH scheduling at a transmission time interval selected by itself to transmit E-DCH data
  • the Node B performs E-DCH scheduling at a transmission time interval selected by the terminal to receive E-DCH data.
  • the terminal selects a short transmission time interval or a long transmission time interval according to the measurement result to use the E-DCH resource, specifically:
  • the terminal receives radio resource control (RRC) signaling sent by a radio network controller (RNC) in a camping cell, and obtains the following information: a criterion for determining a transmission time interval of the E-DCH, and a PRACH carrying the E-DCH a first scrambling code set and a second scrambling code set of the preamble portion, a measurement period of a 'J, a zone forward access channel state;
  • RRC radio resource control
  • the terminal performs measurement according to the judgment criterion of the transmission time interval of the E-DCH and the measurement period of the cell forward access channel state, and judges according to the judgment criterion of the transmission time interval of the E-DCH, and selects to use the short transmission time interval or Long transmission time interval.
  • the criterion for determining the transmission time interval of the E-DCH is one of the following:
  • the criterion is: determining, according to the received signal code power of the primary common pilot channel of the camping cell, and the received signal code power threshold of the primary common pilot channel;
  • Criterion 2 determining, according to the received power per chip and the in-band power density ratio of the primary common pilot channel of the camped cell, and the ratio of the received power per chip and the in-band power density of the primary common pilot channel;
  • Criterion 3 Determine according to the path loss of the camped cell, and the path loss threshold. The method further includes:
  • the terminal performs the primary public of the resident cell every other cell forward to the measurement period of the access channel state. Measurement of the received signal code power of the pilot channel, and each measurement The received signal code power of the primary common pilot channel of the camped cell is compared with the received signal code power threshold of the primary common pilot channel;
  • the terminal selects to use the short transmission time interval; otherwise, the terminal selects to use the long transmission time interval.
  • the method further includes:
  • the terminal performs the primary common guide of the camped cell every other cell forward to the measurement period of the access channel state. Measurement of the ratio of received power per chip to in-band power density of the frequency channel, and the ratio of received power per chip to in-band power density of the primary common pilot channel of each of the measured camping cells, and the main commonality The received power per chip of the frequency channel is compared with the in-band power density ratio threshold;
  • the terminal selects to use short Transmission time interval; otherwise, the terminal chooses to use a long transmission time interval.
  • the method further includes:
  • the terminal performs the path loss of the camped cell every other cell forward to the measurement period of the access channel state. Measuring, and comparing the path loss of each measured resident cell with a path loss threshold;
  • the terminal chooses to use the short transmission time interval; otherwise, the terminal chooses to use the long transmission time interval.
  • the terminal notifies the node B of the transmission time interval information selected by the terminal by scrambling different scrambling codes for the preamble portion of the PRACH carrying the E-DCH, specifically:
  • the terminal is at the first The scrambling code set randomly selects a scrambling code to scramble the preamble portion of the PRACH to construct a PRACH preamble coding. If the transmission time interval selected by the terminal is a long transmission time interval, the terminal randomly selects one of the second scrambling code sets. The scrambling code scrambles the leading part of the PRACH to construct a PRACH preamble coding;
  • the terminal transmits the PRACH preamble encoding to the Node B.
  • the Node B performs E-DCH scheduling at the transmission time interval selected by the terminal to receive E-DCH data, specifically:
  • the Node B receives the Node B Application Part (NBAP) signaling sent by the RNC, and includes: a first scrambling code set of a preamble portion of the PRACH carrying the E-DCH dedicated to the short transmission time interval in the designated cell, dedicated a second scrambling code set of a preamble portion of the PRACH carrying the E-DCH at a long transmission time interval;
  • NBAP Node B Application Part
  • the Node B receives the PRACH preamble initiated by the terminal in the designated cell, and descrambles the received PRACH preamble. If the Node B successfully descrambles the PRACH preamble using the scrambling code in the first scrambling code set, the Node B records The terminal uses a short transmission time interval; if the Node B successfully descrambles the PRACH preamble using the scrambling code in the second scrambling code set, the Node B records the terminal using a long transmission time interval;
  • the Node B performs E-DCH scheduling to receive E-DCH data according to the recorded transmission time interval.
  • the present invention also provides a system for processing an enhanced dedicated transport channel, the system comprising: a terminal and a node B, wherein
  • the terminal is configured to use an E-DCH resource according to a measurement result of the camped cell, select a short transmission time interval or a long transmission time interval, and scramble different scrambling codes by using a preamble portion of the PRACH carrying the E-DCH And notifying the node B of the transmission time interval information selected by the terminal; the node B, configured to acquire, according to the scrambling code that the terminal is scrambled by the preamble portion of the PRACH carrying the E-DCH, obtain the transmission time selected by the terminal Interval information.
  • the terminal is further configured to: perform E-DCH scheduling by using a transmission time interval selected by itself to send E-DCH data;
  • the Node B is further configured to perform E-DCH scheduling by using a transmission time interval selected by the terminal to receive E-DCH data.
  • the terminal is further configured to: receive RRC signaling sent by the RNC in the camping cell, and obtain the following information: a criterion for determining a transmission time interval of the E-DCH, and a first scrambling code of a preamble portion of the PRACH carrying the E-DCH a set and a second scrambling code set, a measurement period of a cell forward access channel state;
  • the measurement is performed according to the judgment criterion of the transmission time interval of the E-DCH and the measurement period of the cell forward access channel state, and is judged according to the judgment criterion of the transmission time interval of the E-DCH, and the short transmission time interval or the long transmission time is selected to be selected. interval.
  • the criterion for determining the transmission time interval of the E-DCH is one of the following:
  • the criterion is: determining, according to the received signal code power of the primary common pilot channel of the camping cell, and the received signal code power threshold of the primary common pilot channel;
  • Criterion 2 determining, according to the received power per chip and the in-band power density ratio of the primary common pilot channel of the camped cell, and the ratio of the received power per chip and the in-band power density of the primary common pilot channel;
  • Criterion 3 Determine according to the path loss of the camped cell, and the path loss threshold.
  • the terminal is further configured to: if the criterion for determining the transmission time interval of the E-DCH in the RRC signaling sent by the RNC is the criterion 1, the terminal performs the measurement period of the access channel state of every other cell. The measurement of the received signal code power of the primary common pilot channel of the camped cell, and the received signal code power of the primary common pilot channel of each of the measured camped cells, and the received signal code of the primary common pilot channel Power thresholds are compared;
  • the terminal selects to use the short transmission time interval; Then, the terminal chooses to use a long transmission time interval.
  • the terminal is further configured to: if the criterion for determining the transmission time interval of the E-DCH in the RRC signaling sent by the RNC is the criterion 2, the terminal performs a measurement period of the state of the access channel state of every other cell. Measurement of the received power per chip and the in-band power density ratio of the primary common pilot channel of the camped cell, and the received power per chip and the in-band power of the primary common pilot channel of each of the measured camped cells Density ratio, compared with the received power per chip of the primary common pilot channel and the in-band power density ratio threshold;
  • the terminal selects to use short Transmission time interval; otherwise, the terminal chooses to use a long transmission time interval.
  • the terminal is further configured to: if the criterion for determining the transmission time interval of the E-DCH in the RRC signaling sent by the RNC is the criterion 3, the terminal performs a measurement period of the status of the access channel state of every other cell. Measuring the path loss of the camped cell, and comparing the path loss of each measured camped cell with the path loss threshold;
  • the terminal chooses to use the short transmission time interval; otherwise, the terminal chooses to use the long transmission time interval.
  • the terminal is further configured to: when the selected transmission time interval is a short transmission time interval, randomly select a scrambling code in the first scrambling code set to scramble a preamble portion of the PRACH to construct a PRACH preamble coding; When the transmission time interval is a long transmission time interval, randomly selecting a scrambling code in the second scrambling code set to scramble the preamble portion of the PRACH to construct a PRACH preamble coding;
  • the terminal transmits the PRACH preamble encoding to the Node B.
  • the Node B is further configured to: receive the NBAP signaling sent by the RNC, where: the first scrambling code set of the preamble portion of the PRACH carrying the E-DCH dedicated to the short transmission time interval in the designated cell, dedicated to the long Preamble of PRACH carrying E-DCH in transmission time interval
  • the Node B receives the PRACH preamble initiated by the terminal in the designated cell, and descrambles the received PRACH preamble.
  • the Node B If the Node B successfully descrambles the PRACH preamble using the scrambling code in the first scrambling code set, the Node B records The terminal uses a short transmission time interval; if the Node B successfully descrambles the PRACH preamble using the scrambling code in the second scrambling code set, the Node B records the terminal using a long transmission time interval;
  • the Node B performs E-DCH scheduling to receive E-DCH data according to the recorded transmission time interval.
  • the present invention provides a method and system for processing an enhanced dedicated transport channel.
  • the common E-DCH resource in a cell can be used for both short transmission time interval scheduling and long transmission time interval scheduling. Coverage and terminal characteristics, the terminal dynamically selects the short transmission time interval or the long transmission time interval to use the E-DCH resource, which ensures coverage and can meet the user's high speed rate.
  • FIG. 1 is a flowchart of a method for processing an enhanced dedicated transport channel related to a terminal side according to an embodiment of the present invention
  • FIG. 2 is a flowchart of a method for processing an enhanced dedicated transport channel related to a Node B side according to an embodiment of the present invention
  • FIG. 3 is a flowchart of a method for processing an enhanced dedicated transport channel associated with an RNC side according to an embodiment of the present invention
  • FIG. 4 is a flowchart of a method for a terminal, a Node B, and an RNC to coordinate processing an enhanced dedicated transport channel according to an embodiment of the present invention. detailed description
  • the present invention aims to enable a common E-DCH resource in a cell to be used for both short transmission time interval scheduling and long transmission time interval scheduling.
  • the terminal dynamically selects a short transmission time.
  • the E-DCH resource is used for the interval or long transmission time interval to ensure both coverage and user high speed.
  • the present invention provides a method for processing an enhanced dedicated transport channel.
  • the terminal selects a short transmission time interval or a long transmission time interval to use the E-DCH resource according to the measurement result of the camped cell, and
  • the preamble portion of the PRACH carrying the E-DCH scrambles different scrambling codes to inform the Node B (NodeB) of the selection information of the transmission time interval.
  • the terminal performs E-DCH scheduling to transmit E-DCH data at the selected transmission time interval; and the Node B selects the information by using the transmission time interval to perform E-DCH scheduling to receive the E-DCH data.
  • the first embodiment of the present invention describes the processing procedure of the terminal.
  • the terminal resides in a certain cell and is in the state of the cell forward access channel.
  • the process mainly includes the following steps:
  • Step 101 The terminal receives the radio resource control (RRC) signal sent by the radio network controller (RNC) in the camping cell, and obtains the following information:
  • RRC radio resource control
  • the criterion for determining the transmission time interval of the E-DCH is one of the following criteria: Criteria 1. Judging based on the received signal code power of the primary common pilot channel of the camped cell, and the primary common pilot channel Receive signal code power threshold, the threshold unit is dBm;
  • Criterion 2 determining, according to the received power per chip and the in-band power density ratio of the primary common pilot channel of the camped cell, and the threshold of the received power per chip and the in-band power density of the primary common pilot channel, the threshold The unit is dB;
  • Criterion 3 Judging based on the path loss of the camped cell, and the path loss threshold, The threshold unit is dB.
  • the terminal saves the above information.
  • the RRC is a communication protocol for processing air interface signaling of the control plane between the terminal and the RNC.
  • RRC signaling is used to establish, re-establish, maintain, and release an RRC connection between the terminal and the RNC.
  • Step 102 The terminal performs measurement according to the judgment criterion of the transmission time interval of the E-DCH and the measurement period of the cell forward access channel state, and performs judgment according to the judgment criterion of the transmission time interval of the E-DCH, thereby selecting to use the short transmission time.
  • the interval is still a long transmission interval.
  • the terminal When the criterion for determining the transmission time interval of the E-DCH is the criterion one, the terminal performs the measurement of the received signal code power of the primary common pilot channel of the camped cell every other cell forward to the measurement period of the access channel state. The terminal compares the received signal code power of the primary common pilot channel of each of the measured camped cells with the received signal code power threshold of the primary common pilot channel. If the measured received signal code power of the primary common pilot channel of the camped cell is greater than the received signal code power threshold of the primary common pilot channel, the terminal chooses to use the short transmission time interval; otherwise, the terminal chooses to use the long transmission time interval. The terminal records or updates the "currently selected transmission time interval" for this latest selection result.
  • the terminal When the criterion for determining the transmission time interval of the E-DCH is the criterion 2, the terminal performs the per-chip received power and the in-band power of the primary common pilot channel of the camped cell every other cell forward access channel state measurement period. Measurement of density ratio. The terminal compares the received power per chip of the primary common pilot channel of each camped cell with the in-band power density ratio, and compares the received power per chip of the primary common pilot channel with the in-band power density ratio threshold. .
  • the terminal selects to use short Transmission time Separate; otherwise, the terminal chooses to use a long transmission time interval.
  • the terminal records or updates the "currently selected transmission time interval" for this latest selection result.
  • the terminal When the criterion for determining the transmission time interval of the E-DCH is the criterion 3, the terminal performs the measurement of the path loss of the camped cell every other cell forward measurement period of the access channel state. The terminal compares the path loss of each measured camped cell with the path loss threshold. If the measured path loss of the camped cell is less than or equal to the path loss threshold, the terminal chooses to use the short transmission time interval; otherwise, the terminal chooses to use the long transmission time interval. The terminal records or updates the "currently selected transmission time interval" for this latest selection result.
  • Step 103 The terminal attempts to initiate uplink random access. If the terminal determines that the currently selected transmission time interval is a short transmission time interval, the terminal randomly selects a scrambling code in the first scrambling code set to scramble the preamble portion of the PRACH to construct a PRACH preamble coding; otherwise, the terminal is in A scrambling code is randomly selected from the second scrambling code set to scramble the preamble portion of the PRACH to construct a PRACH preamble coding. The terminal sends the coded PRACH preamble (that is, the constructed PRACH preamble code) to the node B for uplink random access.
  • the coded PRACH preamble that is, the constructed PRACH preamble code
  • Step 104 The terminal receives a forward acknowledgment from the Node B on the acquisition indication channel, and an E-DCH resource allocated by the Node B to the local terminal.
  • Step 105 The terminal performs E-DCH scheduling by using the interval period of scrambling the corresponding transmission time interval in step 103 to transmit E-DCH data.
  • step 103 the terminal uses the scrambling code in the first scrambling code set to perform scrambling to construct the PRACH preamble encoding, the terminal performs E-DCH scheduling to transmit the E-DCH data in an interval period of a short transmission time interval; If, in step 103, the terminal uses the scrambling code in the second scrambling code set to perform scrambling to construct the PRACH preamble encoding, the terminal performs E-DCH scheduling to transmit the E-DCH data at intervals of long transmission time intervals.
  • the second embodiment of the present invention describes the processing procedure of the node B.
  • the method mainly includes the following steps: Step 201:
  • the node ⁇ receives the Node B Application Part (NBAP) signaling sent by the RNC, and performs configuration of a common E-DCH operation in the designated cell.
  • the NBAP signaling includes the following information: a first scrambling code set of a preamble portion of a PRACH carrying an E-DCH dedicated to a short transmission time interval in a designated cell; a preamble of a PRACH carrying an E-DCH dedicated to a long transmission time interval Part of the second set of scrambling codes. Node B saves this information.
  • Step 202 The Node B receives the PRACH preamble initiated by the terminal in the designated cell, and descrambles the PRACH preamble. If the Node B successfully descrambles the PRACH preamble using the scrambling code in the first scrambling code set, the Node B records the terminal using the short transmission time interval; if the Node B uses the scrambling code in the second scrambling code set for this PRACH The preamble successfully descrambles, then Node B records the terminal using a long transmission time interval.
  • Step 203 The Node B sends a forward acknowledgment to the terminal on the capture indication channel and the E-DCH resource allocated by the Node B to the terminal in the designated cell.
  • Step 204 Node B performs E-DCH scheduling to receive E-DCH data according to the recorded transmission time interval.
  • the Node B performs the E-DCH scheduling at the interval of the short transmission time interval to receive the E-DCH data; if the Node B records the terminal using the long transmission time interval, The Node B performs E-DCH scheduling at intervals of long transmission time intervals to receive E-DCH data.
  • the third embodiment of the present invention describes the processing procedure of the RNC, as shown in FIG. 3, which mainly includes the following steps:
  • Step 301 The RNC determines the configuration of the common E-DCH operation in the designated cell, including: a) The criterion for determining the transmission time interval of the E-DCH in the designated cell is one of the following criteria:
  • the criterion is: determining, according to the received signal code power of the primary common pilot channel of the camping cell, and the received signal code power threshold of the primary common pilot channel, the threshold unit is dBm; Criterion 2: determining, according to the received power per chip and the in-band power density ratio of the primary common pilot channel of the camped cell, and the threshold of the received power per chip and the in-band power density of the primary common pilot channel, the threshold The unit is dB;
  • Criterion 3 Judging according to the path loss of the camped cell, and the path loss threshold, the threshold unit is dB.
  • Step 302 The RNC sends the NBAP signaling to the Node B, and notifies the Node B to perform the configuration of the common E-DCH operation in the designated cell.
  • the NBAP signaling includes the following information: a first scrambling code set of a preamble portion of the PRACH of the E-DCH dedicated to the short transmission time interval in the designated cell; a PRACH carrying the E-DCH dedicated to the long transmission time interval A second set of scrambling codes for the preamble portion.
  • Step 303 The RNC sends RRC signaling to the terminal in the specified cell, where the RRC signaling includes the following information:
  • the criterion for determining the transmission time interval of the E-DCH is one of the following criteria: Criteria 1. Judging based on the received signal code power of the primary common pilot channel of the camped cell, and the primary common pilot channel Receive signal code power threshold, the threshold unit is dBm;
  • Criterion 2 determining, according to the received power per chip and the in-band power density ratio of the primary common pilot channel of the camped cell, and the threshold of the received power per chip and the in-band power density of the primary common pilot channel, the threshold The unit is dB;
  • Criterion 3 Judging according to the path loss of the camped cell, and the path loss threshold, the threshold unit is dB. b) a first scrambling code set and a second scrambling code set of the preamble portion of the PRACH carrying the E-DCH. c) The measurement period of the cell's forward access channel status.
  • Embodiment 4 of the present invention describes a method for processing an enhanced dedicated transport channel, as shown in FIG. 4, which mainly includes the following steps:
  • Step 401 The RNC decides to perform the configuration of the common E-DCH operation in the designated cell, including: a) The criterion for determining the transmission time interval of the E-DCH in the designated cell is one of the following criteria:
  • the criterion is: determining, according to the received signal code power of the primary common pilot channel of the camping cell, and the received signal code power threshold of the primary common pilot channel, the threshold unit is dBm;
  • Criterion 2 determining, according to the received power per chip and the in-band power density ratio of the primary common pilot channel of the camped cell, and the threshold of the received power per chip and the in-band power density of the primary common pilot channel, the threshold The unit is dB;
  • Criterion 3 Judging according to the path loss of the camped cell, and the path loss threshold, the threshold unit is dB.
  • Step 402 The RNC sends the NBAP signaling to the Node B, and notifies the Node B to perform the configuration of the common E-DCH operation in the designated cell.
  • the NBAP signaling includes the following information: a first scrambling code set of a preamble portion of the PRACH of the E-DCH dedicated to the short transmission time interval in the designated cell; a PRACH carrying the E-DCH dedicated to the long transmission time interval A second set of scrambling codes for the preamble portion.
  • Step 403 The terminal camps in the designated cell, and is in a cell forward access channel state.
  • the terminal receives the RRC signaling sent by the RNC in the designated cell, and obtains the following information: a)
  • the criterion for determining the transmission time interval of the E-DCH is one of the following criteria: 1.
  • the primary public according to the resident cell The received signal code power of the pilot channel is judged, and the received signal code power threshold of the primary common pilot channel, the threshold unit is dBm;
  • Criterion 2 determining, according to the received power per chip and the in-band power density ratio of the primary common pilot channel of the camped cell, and the threshold of the received power per chip and the in-band power density of the primary common pilot channel, the threshold The unit is dB;
  • Criterion 3 Judging according to the path loss of the camped cell, and the path loss threshold, the threshold unit is dB.
  • the terminal saves the above information.
  • Step 404 The terminal performs measurement according to the judgment criterion of the transmission time interval of the E-DCH when the measurement period of the first cell forward access channel state is reached.
  • the terminal When the criterion for determining the transmission time interval of the E-DCH is the criterion one, the terminal performs the measurement of the received signal code power of the primary common pilot channel of the camped cell every other cell forward to the measurement period of the access channel state. The terminal compares the received signal code power of the primary common pilot channel of each of the measured camped cells with the received signal code power threshold of the primary common pilot channel. If the measured received signal code power of the primary common pilot channel of the camped cell is greater than the received signal code power threshold of the primary common pilot channel, the terminal chooses to use the short transmission time interval; otherwise, the terminal chooses to use the long transmission time interval. The terminal records or updates the "currently selected transmission time interval" for this latest selection result.
  • the terminal When the criterion for determining the transmission time interval of the E-DCH is the criterion 2, the terminal performs the per-chip connection of the primary common pilot channel of the camped cell every other cell forward access channel state measurement period. Measurement of the ratio of received power to in-band power density. The terminal compares the received power per chip of the primary common pilot channel of each camped cell with the in-band power density ratio, and compares the received power per chip of the primary common pilot channel with the in-band power density ratio threshold. .
  • the terminal selects to use short Transmission time interval; otherwise, the terminal chooses to use a long transmission time interval.
  • the terminal records or updates the "currently selected transmission time interval" for this latest selection result.
  • the terminal When the criterion for determining the transmission time interval of the E-DCH is the criterion 3, the terminal performs the measurement of the path loss of the camped cell every other cell forward measurement period of the access channel state. The terminal compares the path loss of each measured camped cell with the path loss threshold. If the measured path loss of the camped cell is less than or equal to the path loss threshold, the terminal chooses to use the short transmission time interval; otherwise, the terminal chooses to use the long transmission time interval. The terminal records or updates the "currently selected transmission time interval" for this latest selection result.
  • Step 405 The terminal performs measurement according to a criterion for determining a transmission time interval of the E-DCH when the measurement period of the second cell forward access channel state is reached.
  • the terminal When the criterion for determining the transmission time interval of the E-DCH is the criterion one, the terminal performs the measurement of the received signal code power of the primary common pilot channel of the camped cell every other cell forward to the measurement period of the access channel state. The terminal compares the received signal code power of the primary common pilot channel of each of the measured camped cells with the received signal code power threshold of the primary common pilot channel. If the measured received signal code power of the primary common pilot channel of the camped cell is greater than the received signal code power threshold of the primary common pilot channel, the terminal chooses to use the short transmission time interval; otherwise, the terminal chooses to use the long transmission time interval. The terminal records or updates the "currently selected transmission time interval" for this latest selection result.
  • the terminal When the criterion for determining the transmission time interval of the E-DCH is the criterion 2, the terminal performs the per-chip connection of the primary common pilot channel of the camped cell every other cell forward access channel state measurement period. Measurement of the ratio of received power to in-band power density. The terminal compares the received power per chip of the primary common pilot channel of each camped cell with the in-band power density ratio, and compares the received power per chip of the primary common pilot channel with the in-band power density ratio threshold. .
  • the terminal selects to use short Transmission time interval; otherwise, the terminal chooses to use a long transmission time interval.
  • the terminal records or updates the "currently selected transmission time interval" for this latest selection result.
  • the terminal When the criterion for determining the transmission time interval of the E-DCH is the criterion 3, the terminal performs the measurement of the path loss of the camped cell every other cell forward measurement period of the access channel state. The terminal compares the path loss of each measured camped cell with the path loss threshold. If the measured path loss of the camped cell is less than or equal to the path loss threshold, the terminal chooses to use the short transmission time interval; otherwise, the terminal chooses to use the long transmission time interval. The terminal records or updates the "currently selected transmission time interval" for this latest selection result.
  • Steps 406 ⁇ 407 the terminal attempts to initiate uplink random access. If the terminal determines that the currently selected transmission time interval is a short transmission time interval, the terminal randomly selects a scrambling code in the first scrambling code set to scramble the preamble portion of the PRACH to construct a PRACH preamble encoding; otherwise, the terminal is in A scrambling code is randomly selected from the second scrambling code set to scramble the preamble portion of the PRACH to construct a PRACH preamble coding. The terminal sends the coded PRACH preamble (that is, the constructed PRACH preamble code) to the node B for uplink random access.
  • the coded PRACH preamble that is, the constructed PRACH preamble code
  • Step 408 The Node B receives the PRACH preamble initiated by the terminal in the designated cell. Node B descrambles this PRACH preamble. If the Node B successfully descrambles the PRACH preamble using the scrambling code in the first scrambling code set, the Node B records the terminal using the short transmission time interval; if the Node B uses the scrambling code in the second scrambling code set for this PRACH The preamble successfully descrambles, then Node B records the terminal using a long transmission time interval.
  • Step 409 the Node B sends the terminal to the terminal in the designated indication channel. Forward acknowledgement, and the E-DCH resources allocated by the Node B for use by the terminal.
  • the terminal receives a forward acknowledgment from the Node B on the acquisition indication channel, and an E-DCH resource allocated by the Node B for use by the terminal.
  • Step 410 If, in step 406, the terminal uses the scrambling code in the first scrambling code set to perform scrambling to construct the PRACH preamble encoding, the terminal performs E-DCH scheduling to transmit the E-DCH at intervals of short transmission time intervals. Data; otherwise, the terminal performs E-DCH scheduling to transmit E-DCH data at intervals of long transmission time intervals.
  • the Node B If the Node B records that the terminal uses the short transmission time interval, the Node B performs the E-DCH scheduling to receive the E-DCH data at intervals of the short transmission time interval; if the Node B records the terminal using the long transmission time interval, the node B performs E-DCH scheduling at intervals of long transmission time intervals to receive E-DCH data.
  • the present invention also provides a system for processing an enhanced dedicated transport channel, comprising: a terminal and a node B, and an RNC.
  • the terminal is configured to use the E-DCH resource according to the measurement result of the camped cell, select a short transmission time interval or a long transmission time interval, and scramble different scrambling codes by using a preamble portion of the PRACH carrying the E-DCH.
  • the node B is notified of the transmission time interval information selected by the terminal.
  • the node B is configured to obtain the transmission time interval information selected by the terminal according to the scrambling code that the terminal scrambles for the preamble portion of the PRACH carrying the E-DCH.
  • the more specific functions implemented by the node B are as shown in the second embodiment shown in FIG. 2, and details are not described herein again.
  • the function implemented by the RNC is shown in the third embodiment shown in FIG. 3, and details are not described herein again.
  • the common E-DCH resource can be used for both short transmission time interval scheduling and long transmission time interval scheduling.
  • the terminal dynamically selects a short transmission time interval or a long transmission time interval.
  • the use of E-DCH resources ensures both coverage and user high-speed rates.

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

Abstract

La présente invention se rapporte à un procédé et à un système adaptés pour gérer un canal de transport dédié amélioré (E-DCH, Enhanced Dedicated Transport CHannel). Le procédé selon l'invention comprend les étapes suivantes : sur la base d'un résultat de mesure d'une cellule résidente, un terminal sélectionne un intervalle de temps de transport court ou un intervalle de temps de transport long pour l'utilisation des ressources d'un E-DCH; le terminal transmet des informations relatives à l'intervalle de temps de transport sélectionné par le terminal, à un nœud B, en embrouillant un code embrouillé différent sur une partie de préambule d'un canal d'accès aléatoire physique (PRACH, Physical Random Access CHannel) qui porte l'E-DCH. Grâce à la solution technique de la présente invention, les ressources d'un E-DCH public de la cellule peuvent être utilisées non seulement pour programmer l'intervalle de temps de transport court, mais elles peuvent aussi être utilisées pour programmer l'intervalle de temps de transport long. D'autre part, une couverture peut être garantie et un taux d'utilisation élevé d'un utilisateur peut être satisfait.
PCT/CN2011/083070 2011-04-11 2011-11-28 Procédé et système pour gérer un canal de transport dédié amélioré WO2012139390A1 (fr)

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CN104145520B (zh) * 2013-01-17 2017-12-15 华为技术有限公司 获取随机接入参数和资源对应关系的方法和装置
CN106912109B (zh) * 2013-08-08 2020-04-24 苹果公司 用于覆盖有限设备的覆盖扩展水平
CN107852313B (zh) * 2015-07-24 2021-08-03 Lg 电子株式会社 下行链路控制信息接收方法和用户设备以及下行链路控制信息发送方法和基站
CN106535352B (zh) * 2015-09-15 2021-12-24 中兴通讯股份有限公司 发送、接收短传输时间间隔通信的信息的方法和装置
CN106550480B (zh) 2015-09-21 2021-09-17 中兴通讯股份有限公司 一种随机接入方法、装置及系统
CN106961732B (zh) * 2016-01-11 2020-06-30 上海诺基亚贝尔股份有限公司 用于降低传输延迟的方法和设备
TW202203678A (zh) 2016-03-30 2022-01-16 美商內數位專利控股公司 無線傳輸/接收單元及由其所執行的方法
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CN107734621A (zh) * 2016-08-12 2018-02-23 夏普株式会社 信道功率控制方法、用户设备及基站

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