WO2011098047A1 - 实现半持续调度业务或类似半持续调度业务的方法及设备 - Google Patents
实现半持续调度业务或类似半持续调度业务的方法及设备 Download PDFInfo
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- WO2011098047A1 WO2011098047A1 PCT/CN2011/070944 CN2011070944W WO2011098047A1 WO 2011098047 A1 WO2011098047 A1 WO 2011098047A1 CN 2011070944 W CN2011070944 W CN 2011070944W WO 2011098047 A1 WO2011098047 A1 WO 2011098047A1
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0413—MIMO systems
- H04B7/0417—Feedback systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
- H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
- H04B7/0636—Feedback format
- H04B7/0639—Using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for beam selection
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03891—Spatial equalizers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0078—Timing of allocation
- H04L5/0082—Timing of allocation at predetermined intervals
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/046—Wireless resource allocation based on the type of the allocated resource the resource being in the space domain, e.g. beams
Definitions
- the present invention relates to communication technologies, and in particular, to a method and device for implementing a semi-persistent scheduling service or a similar semi-persistent scheduling service.
- LTE Long Term Evolution
- 3GPP 3rd Generation Partnership Project
- the terminal needs to pass the physical uplink control channel (PUCCH, Physical Uplink Control Channel) and the physical uplink shared channel in order to support dynamic scheduling and downlink multiple input multiple output (MIMO) transmission technologies.
- PUCCH Physical Uplink Control Channel
- MIMO multiple input multiple output
- PUSCH Physical Uplink Share Channel
- CSI includes channel quality information (CQI, Channel Quality Information), code matrix indication (PMI, Precoding Matrix Information), and rank indication (RI, Rank Indication) information.
- CQI Channel Quality Information
- PMI code matrix indication
- RI rank Indication
- the dynamic scheduling uses the Physical Layer Downlink Control Channel (PDCCH) to signal the terminal scheduling information at each scheduling time, which provides great flexibility, but also generates a high signaling load. This signaling overhead is especially noticeable for more regular low-speed services.
- PDCCH Physical Layer Downlink Control Channel
- 3GPP defines semi-persistent scheduling (SPS,
- the idea is to allocate resource usage over a longer period of time for more regular low-speed services, without sending PDCCH signaling for each transmission.
- State allocation The SPS service is usually activated and deactivated by the PDCCH signaling, and the activated PDCCH signaling carries scheduling information such as resource allocation.
- the terminal Before deactivating the service, the terminal will transmit a new data packet according to the relevant scheduling information allocated at the time of activation on a fixed period, unless there is new PDCCH signaling to update the relevant scheduling information.
- the LTE R8 system there are mainly several MIMO transmission modes of single antenna port transmission, transmit diversity, and spatial multiplexing.
- the closed-loop spatial multiplexing mode it is necessary to notify the terminal of the corresponding precoding information, that is, a Precoding Matrix Indicator (PMI), which is usually carried by the PDCCH allocation information (grant).
- PMI Precoding Matrix Indicator
- the MIMO transmission mode of the terminal is usually semi-statically configured by the base station.
- the SPS service has a PDCCH grant in addition to being activated.
- Subsequent data transmission usually does not have a corresponding PDCCH grant, so the PMI required for spatial multiplexing cannot be obtained.
- the LTE R10 version will adopt closed-loop spatial multiplexing technology, and the transmit diversity technology will not be adopted.
- the MIMO transmission mode configured by the base station to the PUSCH is the space multiplexing technology
- the existing SPS mechanism usually has no PDCCH grant except for the initial transmission, and cannot obtain the PMI, and can only fall back to the single antenna port transmission mode.
- Embodiments of the present invention provide a method and device for implementing a semi-persistent scheduling service or a similar semi-persistent scheduling service, so that such a service can support a closed-loop space division multiplexing MIMO transmission mode.
- a method for implementing a semi-persistent scheduling service or a similar semi-persistent scheduling service comprising: notifying a terminal of its SPS or a SPS-like period, so that the terminal sends an SPS service or a similar manner according to the period using a closed-loop rank 1 transmission mode.
- SPS business data Dynamically notifying the terminal that its SPS service or similar SPS service supports a coding matrix indicator PMI required for a closed-loop rank of one transmission mode, so that the terminal uses the latest received PMI when transmitting SPS service or similar SPS service data;
- the SPS service or the similar SPS service data transmitted by the terminal is received based on the closed-loop rank 1 transmission mode.
- a method for implementing a semi-persistent scheduling service or a similar semi-persistent scheduling service comprising: the terminal adopting a closed-loop rank-one transmission mode to send an SPS service in an SPS period configured by a base station or to send similar SPS service data in a SPS-like period;
- a base station comprising:
- a period notification unit configured to notify the terminal of its SPS or a similar SPS period, so that the terminal sends an SPS service or similar SPS service data according to the period using a closed-loop rank 1 transmission mode
- a PMI notification unit configured to dynamically notify the terminal that its SPS service or similar SPS service supports a PMI required for a closed-loop rank of 1 transmission mode, so that the terminal uses the latest received when transmitting SPS service or similar SPS service data.
- a receiving unit configured to receive an SPS service or similar SPS service data sent by the terminal according to a closed-loop rank-one transmission mode, where the terminal is used according to the period received from the notification unit, using the PMI
- the latest received PMI of the notification unit sends the SPS service or similar SPS service data.
- a terminal comprising:
- a PMI acquiring unit configured to acquire a PMI required by the base station to dynamically notify the SPS service or a similar SPS service to support a closed-loop rank of 1 transmission mode
- a sending unit configured to use a transmission mode with a closed-loop rank of 1 in an SPS period configured by the base station Send SPS service or send similar SPS service data in a SPS-like period, and after the PMI acquisition unit acquires a new PMI, use it within the SPS period configured by the base station or during the SPS-like period.
- the new PMI sends SPS services or similar SPS service data.
- the method and the device for implementing the semi-persistent scheduling service or the similar semi-persistent scheduling service in the embodiment of the present invention can dynamically notify the terminal that the SPS service or the similar SPS service supports the PMI required by the closed-loop rank 1 transmission mode. Supports closed-loop space division multiplexing MIMO transmission mode, and can effectively improve the transmission performance of such services.
- FIG. 1 is a flow chart of a method for implementing an SPS service or a similar SPS service on a base station side according to an embodiment of the present invention
- FIG. 2 is a flow chart of a method for implementing an SPS service or a similar SPS service on a terminal side according to an embodiment of the present invention
- FIG. 3 is a flowchart of a method for implementing an SPS service or a similar SPS service according to an embodiment of the present invention
- FIG. 4 is a flowchart of a method for implementing an SPS service or a similar SPS service in the second embodiment of the present invention
- FIG. 5 is a flowchart of a method for implementing an SPS service or a similar SPS service according to Embodiment 3 of the present invention
- FIG. 6 is a flowchart of a method for implementing a similar SPS service in the fourth embodiment of the present invention
- FIG. 8 is a flowchart of a method for implementing an SPS service in the fifth embodiment of the present invention
- FIG. 8 is a sixth embodiment of the present invention.
- FIG. 9 is a flowchart of a method for implementing an SPS service or a similar SPS service according to Embodiment 7 of the present invention.
- FIG. 10 is a schematic structural diagram of a base station according to an embodiment of the present invention
- FIG. 11 is a schematic structural diagram of a specific implementation of a base station according to an embodiment of the present invention.
- FIG. 12 is a schematic structural diagram of a terminal according to an embodiment of the present invention.
- SPS services or similar SPS services can support closed-loop space division multiplexing MIMO transmission modes.
- the method and device for implementing the SPS service or the SPS service provided by the embodiment of the present invention ensure that the SPS service or the similar SPS service supports the closed loop air separation by dynamically notifying the SPS service or the PMI required by the SPS service.
- the SPS-like service refers to the method of transmitting and transmitting information on a predefined frequency resource in a fixed period by using PDCCH signaling to activate and de-lay or through high-layer signaling configuration.
- Non-SPS services such as periodic PUSCH feedback CSI or transmission of pre-coded uplink SRS (Sounding Reference Signal).
- the transmission of the pre-coded uplink SRS refers to the pre-coding of the SRS for each transmission of the SRS on the basis of the LTE R8 SRS transmission mechanism.
- the SPS or similar SPS period refers to the time interval in which a new packet is transmitted on a predefined frequency resource in an SPS or similar SPS service.
- FIG. 1 it is a flowchart of a method for implementing an SPS service or a similar SPS service on a base station side according to an embodiment of the present invention, including the following steps:
- Step 101 Notify the terminal of the SPS or the SPS-like period, so that the terminal sends the SPS service or the similar SPS service data by using the closed-loop rank 1 transmission mode according to the period.
- the base station may configure and send PDCCH uplink allocation information to the terminal through the upper layer.
- the terminal may send the SPS service or the like SPS service data by using the closed loop rank 1 transmission mode on the frequency resource defined in the PDCCH uplink allocation information or the frequency resource configured in the upper layer according to the period.
- the PDCCH signaling indicating the PUSCH allocation information is generally referred to as a UL grant
- the PDCCH signaling indicating the Physical Downlink Shared Channel (PDSCH) allocation information is referred to as a DL grant.
- PDSCH Physical Downlink Shared Channel
- the base station may notify the terminal of its SPS or SPS-like period through high-layer signaling, such as radio resource control (RRC) signaling, or notify the terminal of the SPS by using PDCCH signaling.
- RRC radio resource control
- Step 102 Dynamically notify the terminal that the SPS service or the similar SPS service supports the PMI required for the closed-loop rank 1 transmission mode, so that the terminal uses the latest PMI when transmitting the SPS service or the similar SPS service data.
- Step 103 The base station receives the SPS service or the similar SPS service data sent by the terminal according to the transmission mode with the closed-loop rank of 1.
- the base station may send the PDCCH uplink allocation information to the terminal to activate the SPS service or the like SPS service, or automatically end according to the configuration of the upper layer.
- the SPS service or the SPS service is implemented in a dynamic manner, and the base station adopts a dynamic manner to notify the terminal that the SPS service or the similar SPS service supports the PMI required by the closed-loop rank 1 transmission mode, so that the SPS service or the similar SPS service can support the closed loop.
- the space division multiplexing MIMO transmission mode effectively improves the transmission performance of SPS services or similar SPS services.
- FIG. 2 it is a flowchart of a method for implementing an SPS service or a similar SPS service on the terminal side according to an embodiment of the present invention, including the following steps:
- Step 201 The terminal adopts a transmission mode with a closed-loop rank of 1 in its SPS period configured by the base station. Send SPS services or send similar SPS service data in a SPS-like cycle.
- Step 202 After obtaining the new PMI required by the base station to send the SPS service or the similar SPS service to support the closed-loop rank 1 transmission mode, use the SPS period configured by the base station or in a period similar to the SPS.
- the new PMI sends SPS services or similar SPS service data.
- the terminal can obtain the PMI, as will be explained later.
- the SPS service or the SPS service is implemented.
- the terminal uses the closed-loop rank 1 transmission mode to send the SPS service or the SPS service data, and obtains the closed-loop rank of the SPS service or the similar SPS service supported by the base station.
- the new PMI is used when transmitting SPS services or similar SPS service data, so that the SPS service or the like SPS service can support the closed-loop space division multiplexing MIMO transmission mode, improve the SPS service or the like. Transmission performance of SPS services.
- the PDCCH grant may be sent to each terminal at the time when the PMI needs to be updated, based on the LTE R8 version. That is, before the service is deactivated, if the PMI has no update requirement, the terminal will send a new data packet according to the relevant scheduling information allocated at the time of activation on a fixed period, and if the PMI has an update request, send the PDCCH grant to the SPS service. Or related scheduling information similar to the SPS service is updated, and the terminal transmits data according to the updated PMI at the next transmission time.
- the PDCCH overhead is large because it needs to send a PDCCH grant to each terminal that needs to update the PMI to notify the PMI that is most suitable for the next data transmission.
- N PDCCH grants need to be sent on the TTI, assuming that each PDCCH grant is occupied.
- the resource is calculated by a Control Channel Element (CCE) (the minimum resource occupied by the PDCCH signaling).
- CCE Control Channel Element
- N CCEs are needed to update the PSIs of the N SPS services or similar SPS service terminals.
- the PMI required by the SPS service or the similar SPS service to support the closed-loop rank 1 transmission mode may be dynamically notified in other manners.
- a base station In a wireless communication system, a base station usually transmits control information to a terminal through a control channel, such as resource allocation, downlink resource allocation, and other information useful to the terminal.
- a control channel such as resource allocation, downlink resource allocation, and other information useful to the terminal.
- the control information sent by the LTE system through the PDCCH includes a Resource Block (RB) allocation, a Transmit Power Control (TPC) command, a Hybrid Automatic Repeat Request (HARQ) process number, and a pre-process.
- RB Resource Block
- TPC Transmit Power Control
- HARQ Hybrid Automatic Repeat Request
- Encoding information Encoding information, modulation and coding methods, new data indications, and redundancy versions.
- DCI Downlink Control Information
- DCI format 0 is used to indicate allocation information of PUSCH
- DCI format 1 is used to indicate the allocation information of PDSCH in Single-Input Multi-ple-Output (SIMO) mode;
- the DCI format 1A is used to indicate the allocation information of the PDSCH and the random access response and the like in the SIMO mode.
- the DCI format 1B is used to indicate the allocation information of the PDSCH for tight resource allocation in the closed-loop rank 1 spatial division multiplexing mode
- DCI format 1C is used to indicate information such as paging and random access response
- the DCI format 1D is used to indicate the allocation information of the PDSCH for tight resource allocation in the MU-MIMO mode
- DCI format 2 is used to indicate allocation information of PDSCH in closed-loop space division multiplexing mode
- DCI format 2A is used to indicate allocation information of PDSCH in open-loop space division multiplexing mode
- DCI format 3 is used to indicate 2-bit power control commands of multiple users' uplink channels
- the DCI format 3A is used to indicate a power control command for a plurality of users to uplink channel 1 bit.
- the DCI format 3B or 3C may be added, and the PMI of the DCM format 3B or the 3C multicast PMI may be used to notify the PMI required by a group of terminals.
- the DCI format 3B corresponds to a 2-bit PMI, such as when the number of terminal transmit antennas is 2; and the DCI format 3C corresponds to a 4-bit PMI, such as when the number of terminal transmit antennas is 4.
- DCI format 3B and 3C can be the same as DCI format 0, for example, 28 bits when the system bandwidth is 20MHz.
- DCI format 3B and 3C content can be set as follows:
- N ⁇ t format
- DCI format For PDCCH format 0 without cyclic redundancy check (CRC, Cyclical
- the SPS service or the SPS service-like terminal in the system needs to be grouped, each group is assigned a group number, each terminal is assigned an intra-group number, and the group number and the group number to which the terminal belongs are required. Notify the terminal.
- Group number is used to control the resources corresponding to this group.
- the group number can be named PMI-RNTI.
- Each user has a unique location in the group.
- the number in the group is determined by the PMI-Index.
- FIG. 3 it is a flowchart of a method for implementing an SPS service or a similar SPS service according to an embodiment of the present invention, which includes the following steps:
- Step 301 Grouping terminals with SPS services or SPS services in advance, assigning a group number to each group, assigning an intra-group number to the terminal, and notifying the group number and the group number to which the terminal belongs. terminal.
- the specific allocation method can be various, for example, it can be any of the following methods, or Is a combination of multiple ways:
- the terminals with the same PMI update period are the same or similar (for example, the PMI update period differs within 10ms) into the same group;
- the terminals corresponding to the SPS service or the resources allocated by the SPS service are the same or similar (for example, the time difference between the allocated resources is within 5ms) is divided into the same group;
- Step 302 Use the PDCCH DCI format 3B or 3C to send the PMI required by the SPS service or the similar SPS service to support the closed-loop rank 1 transmission mode of each group of terminals, and mask the CRC of the PDCCH by using the group number of each group.
- the base station when the base station transmits downlink control information to the terminal through the PDCCH, a 16-bit CRC is added after the control information bit, and the CRC is masked with a unique Radio Network Temporary Identifier (RNTI).
- RNTI Radio Network Temporary Identifier
- the PDCCH for a certain terminal uses a unique identifier of the terminal, such as a cell RNTI (C-RNTI, Cell-RNTI), and masks the CRC
- a PDCCH (such as a system message, etc.) for multiple terminals uses a common The identification number, such as the system message RNTI (SI-RNTI, System Information-RNTI), etc., masks the CRC.
- SI-RNTI system message RNTI
- SI-RNTI System Information-RNTI
- the base station After the base station adds a CRC to the control information to be transmitted and masks the CRC, a series of processes such as channel coding, rate matching, and modulation are also required.
- the rate matching needs to be performed according to the aggregation dimension of the CCE of the PDCCH signaling.
- the PDCCH signaling CCE has an aggregation dimension of 1, 2, 4, and 8 in the LTE system. For example, if the aggregation dimension of a certain PDCCH signaling is 2, the time-frequency resource allocated to the PDCCH signaling is 2 CCEs.
- the control information to be transmitted by the base station is sent to the terminal after being processed by a series of sending ends.
- multiple PDCCH signalings can be sent in one subframe, and the terminal detects the corresponding PDCCH signaling by means of blind detection.
- the corresponding RNTI is used for de-masking. If the CRC is successful after the de-masking, the corresponding PDCCH signaling is detected.
- the base station uses the group number of each group to mask the CRC of the PDCCH.
- Step 303 The terminal detects the PDCCH DCI format 3B or 3C according to the group number to which the terminal belongs, and obtains the corresponding PMI according to the own intra-group number.
- the terminal may detect the corresponding PDCCH signaling by means of blind detection.
- the pre-masked group number is used for de-masking. If the CRC is successful after the de-masking, the corresponding PDCCH signaling is detected, and then the corresponding PMI is obtained according to the number of the group.
- Step 304 The terminal pre-codes and sends the SPS service or the data that needs to be sent by the SPS service according to the received PMI.
- Step 305 The base station receives, according to the PMI corresponding to the terminal, an SPS service or similar SPS service data sent by the terminal.
- the method for implementing an SPS service or a similar SPS service in the embodiment of the present invention has the advantage of small overhead. For example, suppose there are N terminals that need to update PSI SPS services or SPS services in a certain TTI, and the system bandwidth is 20 MHz.
- a PDCCH DCI 3B can carry the PMI of 14 terminals, and only N/14 DCI 3Bs are needed to notify the PMI of all terminals. If one PDCCH DCI 3B occupies 4 CCEs, then the resources required by the N users of the N users are updated. (N/14) * 4 CCEs. As you can see, you can greatly reduce the overhead.
- statistical multiplexing is actually a kind of time division multiplexing, which is called statistical time division multiplexing, also called asynchronous time division multiplexing.
- Asynchronous time division multiplexing or statistical time division multiplexing is to allocate the time slots of the common channel on demand, that is, only to those terminals that need to transmit information or are working, so that all time slots can be fully utilized.
- the number of terminals of the service can be made larger than the number of time slots, thereby improving the utilization of resources, thereby playing the role of multiplexing.
- a group number and a group number assigned to a terminal in step 301 can be changed to a plurality of group numbers and corresponding plurality of group numbers.
- an SPS service or a similar SPS service is activated, Indicates that the terminal can only use one of multiple group numbers and corresponding multiple in-group numbers.
- the PDSCH is carried by the PDSCH to implement multiplexing of the downlink data and the PMI.
- the PMI information may be carried in the PDSCH on the nkth subframe. If the n_kth subframe does not transmit the PDSCH, since not every subframe needs to transmit the PDSCH, the PMI that was updated the previous time is used.
- FIG. 4 it is a flowchart of a method for implementing an SPS service or a similar SPS service in the second embodiment of the present invention, including the following steps:
- Step 401 Calculate the number of PMI occupation modulation symbols required by the SPS service of the terminal or the similar SPS service to support the closed-loop rank of 1 transmission mode.
- MCS Modulation and Coding Scheme
- Step 402 Calculate the number of bits after PMI channel coding.
- the calculation can be performed using the following formula:
- 2 is the number of bits after PMI channel coding, which is the modulation order.
- Step 403 The ⁇ and the data are multiplexed according to the calculated number of bits after the ⁇ channel coding.
- Step (2) can be implemented in two ways: one is to directly place the PMI channel-encoded bits in front of the data channel-encoded bits; the second is to encode the data channel. The last ⁇ bits are replaced with PMI encoded bits.
- Step 404 The PMI and the data multiplexed bits are subjected to a series of processing such as scrambling, modulation, and resource mapping, and then sent to the terminal.
- Step 405 The terminal demultiplexes the data in the received PDSCH with the PMI, and separates the PMI information transmitted with the data.
- Step 406 Perform channel decoding on the separated PMI information to obtain PMI original information bits.
- Step 407 The terminal pre-codes and sends the SPS service or the data to be sent by the SPS service using the PMI original information bit on the subframe that needs to send the SPS service or the SPS service.
- Step 408 The base station receives, according to the PMI corresponding to the terminal, an SPS service or similar SPS service data sent by the terminal.
- the PMI information is multiplexed with the downlink data sent in the PDSCH, thereby saving overhead.
- the PMI information is also carried in the PDSCH, but the multiplexing manner between the PMI and the downlink data is different from that in the second method.
- FIG. 5 it is a flowchart of a method for implementing an SPS service or a similar SPS service in Embodiment 3 of the embodiment of the present invention, including the following steps:
- Step 501 Calculate a size of an equivalent transport block, where the equivalent transport block includes a PDSCH data information bit, a redundancy check bit, and a PMI required by the terminal to support an SPS service or a similar SPS service using a closed-loop rank of 1 transmission mode. Bit.
- ⁇ is the size of the equivalent transport block, which is the transport block size of the PDSCH data
- 24 is redundant
- the remaining check bits, N is the original number of bits of the PMI to be transmitted.
- Step 502 Perform code block segmentation according to the size of the equivalent transport block.
- Step 503 Calculate the number of bits after the PMI channel is encoded.
- the calculation can be performed based on the following formula:
- C + is the number of code blocks of size
- C is the number of code blocks of size
- the sum of C + and C- is the total code obtained in the second step
- the number of blocks; the values of K + and see the existing protocol; ⁇ " ⁇ + ⁇ .
- Step 504 Perform channel coding on the ⁇ according to the calculated number of bits after the ⁇ channel coding.
- Ratio 3 ⁇ 4 port, RM code.
- Step 505 multiplexing the channel-coded bits with the data blocks in the PDSCH, and performing the following processing: code block segmentation, channel coding, rate matching, and code block concatenation.
- Step 506 Perform a series of processing such as scrambling, modulation, and resource mapping on the bit obtained in step 505, and send the sequence to the terminal.
- Step 507 The terminal demultiplexes the data in the received PDSCH with the PMI, and separates the PMI information transmitted with the data.
- Step 508 Perform channel decoding on the separated PMI information, and obtain an original information bit of the PMI.
- Step 509 The terminal uses the PMI original information bit to pre-code and transmit data that needs to be sent by the SPS service or the SPS-like service on the subframe that needs to send the SPS service or the SPS-like service.
- the PMI information is multiplexed and transmitted with the downlink data sent in the PDSCH, which not only saves overhead, but also provides stronger protection for the PMI because the PMI information is channel-coded twice.
- the domain "TPC command for PUCCH" in the PDCCH DL grant is used to transmit 2 bits of PMI information, so that the SPS-enabled service supports the closed-loop rank 1 transmission mode.
- the PDCCH DL grant includes the PDCCH DCI format 1, 1A, 1B, 1D, 2, 2A, 2B, 2C, or other new DCI format.
- the base station may send the PDCCH format 1, 1A, 1B, 1D, 2, 2A, 2B, 2C, or other new DCI format every time in the domain "TPC command for PUCCH". Carry the latest PMI information.
- the terminal detects the PDCCH in a subframe sent by the PDCCH DCI format 1, 1A, 1B, 1D, 2, 2A, 2B, 2C, or other new DCI format, and if the detection succeeds, updates the PMI information saved by itself.
- the terminal uses the latest PMI each time it wants to send SPS-like business data.
- the flow chart of the method for implementing the SPS service in the fourth embodiment of the present invention includes the following steps:
- Step 601 The base station in the DCI format uses the field for indicating the PUCCH transmission power control command to indicate the latest two-bit PMI information each time the PDCCH is sent.
- Step 602 The terminal detects the DCI format of the PDCCH to obtain the latest PMI, and updates the PMI information saved by itself.
- Step 603 When the terminal needs to send a subframe similar to the SPS service, the terminal performs precoding using the saved latest PMI.
- Step 604 The base station receives similar SPS service data sent by the terminal according to the PMI corresponding to the terminal, and detects the data.
- the embodiments of the present invention can reuse the existing mechanism to the greatest extent, and have less impact on existing standards, but because it uses the DCI format of the PDCCH 1, 1A, 1B, 1D, 2, 2A, 2B, 2C, or other new The domain "TPC command for PUCCH" in the DCI format, so this mode is only applicable to the SPS service, which is a periodic PUSCH feedback CSI, that is, a scenario in which PUCCH is not required.
- the base station transmits the PMI information by using the PHICH (Physical Hybrid ARQ Indicator Channel) resource corresponding to the PUSCH of the SPS service, and implements a transmission mode similar to the SPS service supporting the closed-loop rank of 1.
- PHICH Physical Hybrid ARQ Indicator Channel
- the base station For the SPS-like service of the periodic PUSCH feedback CSI implemented by the SPS mechanism, the base station does not need to feed back ACK (Acknowledgment, Negative Acknowledgement) / NACK (Negative Acknowledgement), so the PHICH resource corresponding to the PUSCH will be idle, therefore, It can be used to transmit PMIs that are similar to those required for SPS service transmission.
- the terminal will detect the PHICH during a SPS-like period and update the saved PMI if the test is successful.
- the flow chart of the method for implementing the SPS service in the fifth embodiment of the present invention includes the following steps:
- Step 701 The base station calculates a PHICH resource corresponding to the PUSCH corresponding to the SPS service, and transmits the information bit corresponding to the PMI through the PHICH.
- the calculation method of the PHICH resource corresponding to the PUSCH of the SPS service is the same as that of the prior art, and will not be described in detail herein.
- the information bits corresponding to the PMI can be regarded as the original information bits of the PHICH, and a series of transmission and reception processes required for PHICH transmission can be performed.
- Step 702 The terminal detects the PHICH, obtains PMI information transmitted in the PHICH, and updates the saved PMI information.
- Step 703 When the terminal needs to send a subframe similar to the SPS service, the terminal performs precoding using the saved latest PMI.
- Step 704 The base station receives a similar SPS sent by the terminal according to the PMI corresponding to the terminal. Business data and detection of the data.
- the I-channel or Q-channel resource corresponding to the calculated PHICH resource may also be used on the basis of calculating the PHICH resource corresponding to the PUSCH occupied by the SPS service by using the existing method.
- the number of bits of supported PMI information can be increased.
- the scheme also has a small impact on the standard. However, since it utilizes the PHICH resource corresponding to the PUSCH, it is only suitable for services that do not need to feed back PUSCH ACK/NACK, such as periodic PUSCH feedback CSI.
- the PDCCH signaling that activates the SPS service or the service such as the SPS carries the PMI, that is, the PMI domain in the signaling is valid, and the PMI is carried in the domain, and the PMI is the best obtained by the base station after long-term statistics. PMI.
- FIG. 8 it is a flowchart of a method for implementing an SPS service or a similar SPS service according to Embodiment 6 of the present invention, which includes the following steps:
- Step 801 The base station sends a PDCCH signaling that activates an SPS service or a service such as an SPS, and carries a PMI in the PMI domain of the signaling, where the PMI is a PMI that is most suitable for uplink transmission in long-term statistics.
- Step 802 After receiving the PDCCH signaling for activating the SPS service or the SPS-like service, the terminal parses the PMI domain in the signaling to obtain the PMI information.
- Step 803 The terminal uses the PMI to perform precoding each time a SPS service or a subframe similar to the SPS service needs to be sent, until the PDCCH signaling or service that updates the service scheduling information is received.
- Step 804 The base station receives similar SPS service data sent by the terminal according to the PMI corresponding to the terminal, and detects the data.
- the scheme can implement SPS services or similar SPS services activated and deactivated by PDCCH signaling to support a closed-loop rank-one transmission mode, which effectively improves the performance of SPS services or similar SPS services.
- Way seven
- a new channel implemented by a PHICH-like channel mechanism which is referred to as a PMI control channel, is used to transmit a PMI using the PMI control channel to implement a closed-loop rank-one transmission mode in which SPS services or similar SPS services are supported.
- FIG. 9 it is a flowchart of a method for implementing an SPS service or a similar SPS service in the seventh embodiment of the present invention, including the following steps:
- Step 901 The base station calculates a PMI control channel resource corresponding to the PUSCH of the SPS or the SPS service, and maps the 2 bit PMI to the PMI control channel resource for transmission.
- the group number and the group number of the PMI control channel corresponding to the PUSCH are calculated according to the existing method; and then the PMI control channel resources in the group that are paired with the calculated group number are also distributed to the terminal, so-called pair That is, the I or Q resource corresponding to the calculated intra-group number.
- the upper bits of the 2-bit PMI may be mapped to the PMI control channel resources for transmission, and the lower bits may be mapped to the PMI control channel resources corresponding to the I-channel or the Q-channel corresponding to the intra-group number.
- the lower bit of the 2-bit PMI is mapped to the PMI control channel resource, and the upper bit is mapped to the PMI control channel resource corresponding to the I channel or the Q channel corresponding to the group internal number.
- Step 902 The terminal detects the corresponding PHICH, obtains PMI information transmitted in the PHICH, and updates the saved PMI information.
- Step 903 When the terminal needs to send a SPS service or a subframe similar to the SPS service, the terminal performs precoding using the saved latest PMI.
- Step 904 The base station receives similar SPS service data sent by the terminal according to the PMI corresponding to the terminal, and detects the data.
- the present invention dynamically informs the terminal that its SPS service or similar SPS service supports the PMI required for the closed-loop rank 1 transmission mode, and enables such a service to support the closed-loop space division multiplexing rank 1 MIMO transmission mode. , effectively improve the transmission performance of such services, and thus have the following beneficial effects:
- Block Error Ratio Block Error Ratio
- bit rate of such services can be increased while the block rate requirement is met, and the resources allocated to such users can be reduced;
- an embodiment of the present invention further provides a base station and a terminal.
- FIG. 10 is a schematic structural diagram of a base station according to an embodiment of the present invention.
- the base station 1000 includes:
- the period notification unit 1001 is configured to notify the terminal of the SPS or the SPS-like period, so that the terminal sends the SPS service or the similar SPS service data according to the period in which the closed-loop rank is 1;
- the PMI notification unit 1002 is configured to dynamically notify the terminal that the SPS service or the similar SPS service supports the coding matrix indicator PMI required by the closed-loop rank 1 transmission mode, so that the terminal sends the SPS service or the similar SPS service data. Use the latest received PMI;
- the receiving unit 1003 is configured to receive the SPS service or the similar SPS service data sent by the terminal according to the closed loop rank 1 transmission mode.
- the base station in the embodiment of the present invention dynamically informs the terminal that the SPS service or the similar SPS service supports the PMI required by the closed-loop rank 1 transmission mode, so that the SPS service or the similar SPS service can support the closed-loop space division multiplexing MIMO transmission mode. , effectively improve the transmission performance of SPS services or similar SPS services.
- the PMI notification unit 1003 can implement PMI in multiple manners. Dynamic notifications.
- FIG. 11 is a schematic structural diagram of a specific implementation of a base station according to an embodiment of the present invention.
- the base station 1100 includes not only:
- the periodic notification unit 1101, the PMI notification unit 1102, and the receiving unit 1103, which are consistent with the embodiment shown in FIG. 10, further includes:
- the grouping unit 1104 is configured to group the terminals with the SPS service or the SPS service, assign a group number to each group, assign an in-group number to the terminal, and notify the group number and the group number to which the terminal belongs.
- the terminal assign a group number to each group, assign an in-group number to the terminal, and notify the group number and the group number to which the terminal belongs.
- the grouping unit 1104 may group the terminals having the SPS service or the SPS service in any one of the following manners or a combination of multiple manners:
- the terminals with the same number of bits of the corresponding PMI are divided into the same group;
- Terminals with the same or similar update periods of the corresponding PMI are divided into the same group;
- Terminals with the same or similar instants corresponding to SPS services or resources allocated by SPS services are grouped into the same group;
- All terminals or part of terminals in the TPC group corresponding to DCI format 3 or DCI format 3A are divided into the same group.
- the PMI notification unit 1102 is specifically configured to use the PDCCH to multicast the PMI required by the SPS service or the similar SPS service of each group of terminals to support the closed-loop rank 1 transmission mode.
- the DCI format 3B or 3C of the PDCCH may be set, where the DCI format 3B corresponds to a 2-bit PMI, and the DCI format 3C corresponds to a 4-bit PMI.
- the DCI format 3B or 3C of the PDCCH is used to transmit the SPS service support closed-loop rank of each group of terminals.
- the PMI required for the transfer mode is specifically configured to use the PDCCH to multicast the PMI required by the SPS service or the similar SPS service of each group of terminals to support the closed-loop rank 1 transmission mode.
- the PMI notification unit 1002 shown in FIG. 10 can also have other specific implementation manners, such as:
- the PMI can be multiplexed with the downlink data sent in the PDSCH; or
- the DCI format is used to indicate the PUCCH transmission power control life each time the PDCCH is delivered.
- the field of the order is used to indicate the latest two-bit PMI information; or
- a PMI control channel adopting a PHICH channel-like mechanism is set, and the PMI is transmitted by using the PMI control channel.
- the PMI notification unit 1002 when the PMI notification unit 1002 multiplexes the PMI and the downlink data sent in the PDSCH, the PMI notification unit 1002 includes:
- a first calculation subunit configured to calculate a number of PMI occupation modulation symbols required by the SPS service or the SPS service of the terminal to support a closed-loop rank of 1 transmission mode, and calculate a PMI according to the number of modulation symbols occupied by the PMI The number of bits after channel coding;
- a first coding processing sub-unit configured to perform channel coding correlation processing on the data and the PMI, respectively;
- a first multiplexing subunit configured to multiplex the encoded data and the PMI
- the first sending subunit is configured to send the multiplexed data and the PMI.
- the first multiplex subunit is specifically configured to place a PMI channel coded bit in front of a data channel coded bit; or encode the data channel to be the same as the PMI channel coded bit.
- the number of bits is replaced with the PMI encoded bits.
- the PMI notification unit 1002 when the PMI notification unit 1002 multiplexes the PMI and the downlink data sent in the PDSCH, the PMI notification unit 1002 includes:
- a second encoding processing sub-unit configured to perform channel coding on the PMI according to the pre-computed number of bits of the PMI channel encoding
- the second sending subunit is configured to send the multiplexed PMI and data.
- the PMI notification unit 1002 may further include:
- a second calculation subunit configured to calculate a PDSCH equivalent transport block size, where the equivalent transport block includes a PDSCH data information bit, a redundancy check bit, and a terminal supporting SPS service or a similar SPS service adopting a closed loop rank of 1 transmission mode
- the information bits of the required PMI
- the PMI notification unit 1002 adopts a preferred embodiment in which a field for indicating a PUCCH transmission power control command in the DCI format is used to indicate the latest two-bit PMI information every time the PDCCH is delivered,
- the PMI notification unit 1002 includes:
- a PDCCH construction sub-unit configured to use a field in the DCI format of the PDCCH for indicating a PUCCH transmit power control command to indicate the latest two-bit PMI information when the PDCCH is constructed;
- FIG. 12 is a schematic structural diagram of a terminal according to an embodiment of the present invention.
- the terminal 1200 includes a transmitting unit 1201 and a PMI acquiring unit 1202. Its towel:
- the PMI obtaining unit 1202 is configured to acquire a PMI required by the base station to send the SPS service or a similar SPS service to support a closed-loop rank of 1 transmission mode;
- the sending unit 1201 is configured to send the SPS service in a SPS period configured by the base station or transmit similar SPS service data in a SPS-like period by using a closed-loop rank-one transmission mode, and obtain a new PMI in the PMI acquiring unit. Thereafter, the SPS service or similar SPS service data is transmitted using the new PMI during its SPS period configured by the base station or during an SPS-like period.
- the PMI obtaining unit 1202 may also have multiple implementation manners, such as:
- the DCI Format 3B corresponds to a 2-bit PMI
- DCI format 3C corresponds to a 4-bit PMI
- the PMI required by the SPS service or the like SPS service to support the closed-loop rank 1 transmission mode is obtained through a PMI control channel similar to the PHICH channel mechanism.
- the terminal in the embodiment of the present invention transmits the SPS service or the SPS service data in the transmission mode with the closed-loop rank of 1, and after acquiring the PMI required by the base station to send its SPS service or similar SPS service to support the closed-loop rank 1 transmission mode,
- the PMI is used each time the SPS service or the like SPS service data is sent, so that the SPS service or the similar SPS service can support the closed-loop space division multiplexing MIMO transmission mode, and improve the transmission performance of the SPS service or the like SPS service.
- each unit or subunit may be a separate module, or a plurality of units or subunits may be combined in one module.
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Description
实现半持续调度业务或类似半持续调度业务的方法及设备 本申请要求于 2010 年 2 月 11 日提交中国专利局、 申请号为 201010111542.8、 发明名称为"实现半持续调度业务或类似半持续调度业务的 方法及设备"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
本发明涉及通信技术, 具体涉及一种实现半持续调度业务或类似半持续 调度业务的方法及设备。
背景技术
长期演进(LTE, Long Term Evolution )是第三代合作伙伴计划 (3GPP, 3rd Generation Partnership Project ) 目前正在研究和完善的标准。 在 LTE无线通 信系统中, 为了支持动态调度、 下行的多输入多输出 (MIMO, Multiple Input Multiple Output )传输等技术, 终端需要通过物理上行控制信道(PUCCH, Physical Uplink Control Channel )及物理上行共享信道 ( PUSCH, Physical Uplink Share Channel ) 向基站反馈信道状态信息 (CSI, Channel State
Information ), CSI包括信道质量信息( CQI, Channel Quality Information ), 编 码矩阵指示( PMI , Precoding Matrix Information )及秩指示( RI , Rank Indication ) 信息等。
动态调度利用物理层下行控制信道( PDCCH, Physical Downlink Control Channel )信令通知终端每个调度时刻相关调度信息,其提供了很大的灵活性, 但也产生了较高的信令负荷。 对于较规则的低速业务, 这种信令开销尤为明 显。 为了降低此类业务的信令负荷, 3GPP定义了半持续调度(SPS ,
Semi-Persistent Scheduling ) 的方式, 其思想是对于较规则的低速业务, 对较 长时间内的资源使用进行分配, 而无需每次传输时都发送 PDCCH信令进行动
态分配。 通常由 PDCCH信令激活和去激活 SPS业务, 激活的 PDCCH信令携带 资源分配等调度信息。 在去激活该业务之前, 终端将在固定的周期上根据激 活时分配的相关调度信息发送新的数据包, 除非期间有新的 PDCCH信令更新 相关调度信息。
在 LTE R8系统中,主要有单天线口传输、发射分集和空间复用几种 MIMO 传输模式。 闭环空间复用模式下需要通知终端相应的预编码信息, 即预编码 矩阵指示符 ( PMI, Precoding Matrix Indicator ), 该 PMI通常由 PDCCH分配信 息 (grant )携带。 终端的 MIMO传输模式通常由基站半静态配置。 LTE R8系 统中,对于终端的下行 SPS业务, 即使基站给 PDSCH配置的传输模式为空间复 用, 也只支持发射分集, 原因主要有以下三方面: 一是 SPS业务除了激活时有 PDCCH grant外, 后续的数据传输通常没有对应的 PDCCH grant, 因而无法获 得空间复用需要的 PMI; 二是因为 SPS业务对应的数据包较小, 无需按两个流 进行传输; 三是发射分集也能提供较好的传输性能。 LTE R8系统中 PUSCH只 支持单天线口传输模式, 因而上行 SPS也仅支持单天线口传输模式。
依据 3GPP标准的最新进展, LTE R10版本上行将采用闭环空间复用技术, 发射分集技术将不被采用。 此时若基站给 PUSCH配置的 MIMO传输模式为空 间复用技术, 而现有 SPS机制除了初次传输外通常无 PDCCH grant, 无法获取 PMI, 只能回退到单天线口传输模式。
发明内容
本发明实施例提供一种实现半持续调度业务或类似半持续调度业务的方 法及设备, 使这类业务能够支持闭环空分复用的 MIMO传输模式。
为此, 本发明实施例提供如下技术方案:
一种实现半持续调度业务或类似半持续调度业务的方法, 包括: 通知终端其 SPS或类似 SPS的周期, 以使所述终端按照所述周期采用闭 环秩为 1的传输模式发送 SPS业务或类似 SPS业务数据;
动态通知所述终端其 SPS业务或类似 SPS业务支持闭环秩为 1传输模式 所需要的编码矩阵指示符 PMI, 以使所述终端在发送 SPS业务或类似 SPS业 务数据时使用最新接收到的 PMI;
基于闭环秩为 1的传输模式接收所述终端发送的 SPS业务或类似 SPS业 务数据。
一种实现半持续调度业务或类似半持续调度业务的方法, 包括: 终端采用闭环秩为 1的传输模式在基站配置的 SPS周期内发送 SPS业务 或在类似 SPS的周期内发送类似 SPS业务数据;
获取所述基站动态通知的所述 SPS业务或类似 SPS业务支持闭环秩为 1 传输模式所需要的新的 PMI后, 在所述基站配置的所述 SPS周期内或在所述 类似 SPS的周期内, 使用所述新的 PMI发送 SPS业务或类似 SPS业务数据。
一种基站, 包括:
周期通知单元, 用于通知所述终端其 SPS或类似 SPS的周期, 以使所述 终端按照所述周期采用闭环秩为 1的传输模式发送 SPS业务或类似 SPS业务 数据;
PMI通知单元, 用于动态通知所述终端其 SPS业务或类似 SPS业务支持 闭环秩为 1传输模式所需要的 PMI,以使所述终端在发送 SPS业务或类似 SPS 业务数据时使用最新接收到的 PMI;
接收单元, 用于基于闭环秩为 1的传输模式接收所述终端发送的 SPS业 务或类似 SPS业务数据, 其中, 所述终端是按照从所述通知单元接收的所述 周期、使用从所述 PMI通知单元最新接收到的 PMI发送所述 SPS业务或类似 SPS业务数据的。
一种终端, 包括:
PMI获取单元, 用于获取基站动态通知的所述 SPS业务或类似 SPS业务 支持闭环秩为 1传输模式所需要的 PMI;
发送单元, 用于采用闭环秩为 1的传输模式在基站配置的 SPS周期内发
送 SPS业务或在类似 SPS的周期内发送类似 SPS业务数据, 并在所述 PMI 获取单元获取到新的 PMI后,在基站配置的所述 SPS周期内或在所述类似 SPS 的周期内, 使用所述新的 PMI发送 SPS业务或类似 SPS业务数据。
本发明实施例实现半持续调度业务或类似半持续调度业务的方法及设 备, 通过基站动态地通知终端其 SPS业务或类似 SPS业务支持闭环秩为 1传 输模式所需要的 PMI,可以使这类业务支持闭环空分复用的 MIMO传输模式, 并能有效地提高这类业务的传输性能。
附图说明
图 1是本发明实施例实现 SPS业务或类似 SPS业务的方法在基站侧的流 程图;
图 2是本发明实施例实现 SPS业务或类似 SPS业务的方法在终端侧的流 程图;
图 3是本发明实施例采用方式一实现 SPS业务或类似 SPS业务的方法的 流程图;
图 4是本发明实施例采用方式二实现 SPS业务或类似 SPS业务的方法的 流程图;
图 5是本发明实施例采用方式三实现 SPS业务或类似 SPS业务的方法的 流程图;
图 6是本发明实施例采用方式四实现类似 SPS业务的方法的流程图; 图 Ί是本发明实施例采用方式五实现类似 SPS业务的方法的流程图; 图 8是本发明实施例采用方式六实现 SPS业务或类似 SPS业务的方法的 流程图;
图 9是本发明实施例采用方式七实现 SPS业务或类似 SPS业务的方法的 流程图;
图 10是本发明实施例基站的一种结构示意图;
图 11是本发明实施例基站的一种具体实现结构示意图;
图 12是本发明实施例终端的一种结构示意图。
具体实施方式
为了使本技术领域的人员更好地理解本发明实施例的方案, 下面结合附 图和实施方式对本发明实施例作进一步的详细说明。
为了提升 SPS业务或类似 SPS业务的传输性能, 可以使 SPS业务或类似 SPS业务支持闭环空分复用的 MIMO传输模式。 为此, 本发明实施例提供的 实现 SPS业务或类似 SPS业务的方法及设备, 通过动态通知终端其 SPS业务 或类似 SPS业务所需要的 PMI, 保证了 SPS业务或类似 SPS业务支持闭环空 分复用的 MIMO传输模式。
下面分别从基站侧和终端侧详细说明实现 SPS业务或类似 SPS业务的过 程。
需要说明的是, 在本发明实施例中, 所述类似 SPS业务是指通过 PDCCH 信令激活和译放或通过高层信令配置, 以固定的周期在预定义的频率资源上 传输信息的这类非 SPS业务, 例如周期 PUSCH反馈 CSI或带预编码的上行 SRS ( Sounding Reference Signal, 探测参考信号)的发送等业务。 所述带预编 码的上行 SRS的发送指在 LTE R8 SRS传输机制的基石出上,对每次发送的 SRS 利用 PMI进行预编码。 所述 SPS或类似 SPS的周期是指 SPS或类似 SPS业 务中在预定义的频率资源上传输新包的时间间隔。
如图 1所示, 是本发明实施例实现 SPS业务或类似 SPS业务的方法在基 站侧的流程图, 包括以下步骤:
步骤 101 , 通知终端其 SPS或类似 SPS的周期, 以使所述终端按照所述 周期采用闭环秩为 1的传输模式发送 SPS业务或类似 SPS业务数据。
具体地,基站可以通过高层配置并向终端发送 PDCCH上行链路分配信息
( UL grant )激活 SPS业务或类似 SPS业务, 也可以仅通过高层配置终端传
输类似 SPS业务。
终端可以按照所述周期在所述 PDCCH上行链路分配信息中定义的频率 资源或高层配置的频率资源上采用闭环秩为 1的传输模式发送 SPS业务或类 似 SPS业务数据。
通常指示 PUSCH分配信息的 PDCCH信令称为 UL grant, 指示物理下行 共享信道( PDSCH, Physical Downlink Share Channel )分配信息的 PDCCH信 令称为 DL grant。 在 LTE R8中, 当 UL grant或 DL grant用 SPS-RNTI加掩 时, 其还起到激活 SPS业务的功能。
在具体应用中, 基站可以通过高层信令如无线资源控制 (RRC, Radio Resource Control )信令, 通知所述终端其 SPS或类似 SPS的周期, 也可以通 过 PDCCH信令通知所述终端其 SPS或类似 SPS的周期。
步骤 102,动态通知所述终端其 SPS业务或类似 SPS业务支持闭环秩为 1 的传输模式所需要的 PMI, 以使所述终端在发送 SPS业务或类似 SPS业务数 据时使用最新的 PMI。
步骤 103 , 基站基于闭环秩为 1的传输模式接收所述终端发送的 SPS业 务或类似 SPS业务数据。
SPS业务或类似 SPS业务发送完成后,基站可以向所述终端发送 PDCCH 上行链路分配信息去激活 SPS业务或类似 SPS业务, 或根据高层的配置自动 结束。
本发明实施例实现 SPS业务或类似 SPS业务的方法, 基站采用动态方式 通知终端其 SPS业务或类似 SPS业务支持闭环秩为 1传输模式所需要的 PMI, 从而可以使 SPS业务或类似 SPS业务支持闭环空分复用的 MIMO传输模式, 有效地提升 SPS业务或类似 SPS业务的传输性能。
如图 2所示, 是本发明实施例实现 SPS业务或类似 SPS业务的方法在终 端侧的流程图, 包括以下步骤:
步骤 201 , 终端采用闭环秩为 1的传输模式在基站配置的其 SPS周期内
发送 SPS业务或在类似 SPS的周期内发送类似 SPS业务数据。
步骤 202, 在获取到基站发送的所述 SPS业务或类似 SPS业务支持闭环 秩为 1传输模式所需要的新的 PMI后, 在基站配置的其 SPS周期内或在类似 SPS的周期内, 使用所述新的 PMI发送 SPS业务或类似 SPS业务数据。
依据基站发送 PMI方式的不同, 终端获取 PMI的方式也可以有多种, 将 在后面伴细说明。
本发明实施例实现 SPS业务或类似 SPS业务的方法, 终端采用闭环秩为 1的传输模式发送 SPS业务或类似 SPS业务数据,在获取到基站发送的其 SPS 业务或类似 SPS业务支持闭环秩为 1传输模式所需要的新的 PMI后, 在发送 SPS业务或类似 SPS业务数据时使用新的 PMI, 从而可以使 SPS业务或类似 SPS业务支持闭环空分复用的 MIMO传输模式,提升 SPS业务或类似 SPS业 务的传输性能。
为了实现基站动态通知所述终端其 SPS业务或类似 SPS业务支持闭环秩 为 1传输模式所需要的 PMI, 可以在 LTE R8版本基础上, 在 PMI需要更新 的时刻对每个终端下发 PDCCH grant, 即在去激活该业务之前, 若 PMI无更 新需求, 则终端将在固定的周期上根据激活时分配的相关调度信息发送新的 数据包, 若 PMI有更新需求, 则发送 PDCCH grant对该 SPS业务或类似 SPS 业务的相关调度信息进行更新, 终端在下一个发送时刻根据更新后的 PMI进 行数据的发送。
但采用这种方式会使得 PDCCH开销较大,因为其需要对每个需更新 PMI 的终端都要发送一个 PDCCH grant来通知最适合下一次数据传输使用的 PMI。 举例来说, 若在某个传输时间间隔(TTI, Transmission Time Interval )上需要 更新 PMI的 SPS业务用户总数为 N个, 则在该 TTI上需要发送 N个 PDCCH grant, 假设每个 PDCCH grant所占资源按 1个控制信道单元( CCE, Control Channel Element ) ( PDCCH信令占用的最少资源 )来计算, 此时需要消耗 N 个 CCE来更新 N个 SPS业务或类似 SPS业务终端的 PMI。
为了进一步减少资源开销,还可以采用其他方式动态通知所述终端其 SPS 业务或类似 SPS业务支持闭环秩为 1传输模式所需要的 PMI, 下面将分别进 行伴细说明。
方式一
无线通信系统中, 基站通常会通过控制信道向终端发送控制信息, 如上 行资源分配、 下行资源分配及其他一些对终端有用的信息。 例如, LTE 系统 通过 PDCCH发送的控制信息包括资源块( RB, Resource Block )分配、 发射 功率控制(TPC, Transmit Power Control )命令、 混合自动重传请求( HARQ, Hybrid Automatic Repeat Request )进程号、 预编码信息、 调制编码方式、 新数 据指示及冗余版本等。
目前, LTE标准中有十种不同的下行控制信息 (DCI, Downlink Control Information )格式, 其中:
DCI格式 0用于指示 PUSCH的分配信息;
DCI格式 1用于指示单输入多输出( SIMO, Single-Input Multi-ple-Output ) 模式下 PDSCH的分配信息;
DCI格式 1A用于指示 SIMO模式下紧资源分配的 PDSCH的分配信息及 随机接入响应等信息;
DCI格式 1B用于指示闭环秩为 1空分复用模式下紧资源分配的 PDSCH 的分配信息;
DCI格式 1C用于指示寻呼和随机接入响应等信息;
DCI格式 1D用于指示 MU-MIMO模式下紧资源分配的 PDSCH的分配信 息;
DCI格式 2用于指示闭环空分复用模式下 PDSCH的分配信息;
DCI格式 2A用于指示开环空分复用模式下 PDSCH的分配信息;
DCI格式 3用于指示多个用户上行信道的 2比特的功控命令;
DCI格式 3A用于指示多个用户上行信道 1比特的功控命令。
在本发明实施例中 , 可以新增 DCI格式 3B或 3C, 利用 DCI格式 3B或 3C组播 PMI, 即将一组终端所需要的 PMI—起通知。 其中, DCI格式 3B对 应 2比特 PMI,如终端发射天线数为 2的情况; DCI格式 3C对应 4比特 PMI, 如终端发射天线数为 4的情况。
DCI格式 3B和 3C的负荷可以与 DCI格式 0相同,例如系统带宽为 20MHz 时为 28比特。 DCI格式 3B和 3C内容可如下设置:
PMI命令 1 , PMI命令 2, PMI命令 3 , · .. , PMI命令 N。
N = DCI格式 I
其中, 若为 DCI 格式 3B , 则 2 ~~ 若为 DCI 格式 3C , 则
N = ■t 格式
4 L
DCI格式。为 PDCCH格式 0不带循环冗余码校验( CRC, Cyclical
Redundancy Check ) 的负荷大小, 包括填充比特 t
厶
< 'DCI格式 I
4
在该方式中, 需对系统中有 SPS业务或类似 SPS业务的终端进行分组, 为每组分配一个组号, 为各终端分配一个组内编号, 并需要将终端所属的组 号和组内编号通知给该终端。
假设 M个用户形成一个组, 组号 (GroupID )用于控制这个组对应的资 源, 该组号可以命名为 PMI-RNTI, 每个用户在组内都有一个唯一确定的位 置, 由每个用户在组内编号 PMI-Index决定。
如图 3所示, 是本发明实施例采用方式一实现 SPS业务或类似 SPS业务 的方法的流程图, 包括以下步骤:
步骤 301 , 预先对有 SPS业务或类似 SPS业务的终端进行分组, 为每组 分配一个组号, 为所述终端分配一个组内编号, 并将终端所属的组号和组内 编号通知给所述终端。
具体的分配方式可以有多种, 比如, 可以是以下的任意一种方式, 或者
是多种方式的组合:
•将对应的 PMI的比特数相同的终端分为同一组;
•将对应的 PMI的更新周期相同或者相近 (比如 PMI的更新周期相差在 10ms以内 ) 的终端分为同一组;
*将 SPS业务或类似 SPS业务分配的资源对应的时刻相同或相近(比如 分配的资源对应的时刻相差在 5ms以内 ) 的终端分为同一组;
•将 DCI格式 3或 DCI格式 3A对应的 TPC组中的所有终端或者部分终 端分为同一组。
步骤 302, 利用 PDCCH DCI格式 3B或 3C发送各组终端其 SPS业务或 类似 SPS业务支持闭环秩为 1传输模式所需要的 PMI, 并利用各组的组号对 PDCCH的 CRC加掩。
LTE 系统中, 当基站通过 PDCCH向终端发送下行控制信息时, 在控制 信息比特后附加 16比特的 CRC,并用一个唯一的无线网络临时识别号( RNTI, Radio Network Temporary Identifier )对 CRC加掩。 通常, 针对某个终端的 PDCCH用该终端特有的识别号, 如小区 RNTI ( C-RNTI, Cell-RNTI ) , 对 CRC加掩,针对多个终端的 PDCCH (如系统消息等)则用一个公共的识别号, 如系统消息 RNTI ( SI-RNTI, System Information-RNTI )等, 对 CRC加掩。 基站对待传输的控制信息附加 CRC并对 CRC加掩后, 还需进行信道编码、 速率匹配、 调制等一系列处理。 其中速率匹配需根据该 PDCCH信令的 CCE 的聚合维数来进行。 目前 LTE系统中 PDCCH信令 CCE的聚合维数有 1、 2、 4和 8四种情况。 举例来说若某个 PDCCH信令的聚合维数为 2, 指分给该 PDCCH信令的时频资源为 2个 CCE。基站对待传输的控制信息进行了一系列 发送端处理之后发送给终端,通常一个子帧内可发送多个 PDCCH信令,终端 通过盲检的方式检测相应的 PDCCH信令。盲检时利用相应的 RNTI进行解掩, 解掩后若 CRC校验成功, 则说明检测到相应的 PDCCH信令。
在本发明实施例中, 基站利用各组的组号对 PDCCH的 CRC进行加掩。
步骤 303 , 终端根据自己所属的组号检测 PDCCH DCI格式 3B或 3C, 并 根据自己的组内编号获得对应的 PMI。
在本发明实施例中, 终端可以通过盲检的方式检测相应的 PDCCH信令。 盲检时利用预先接收到的自己所属的组号进行解掩,解掩后若 CRC校验成功, 则说明检测到相应的 PDCCH信令,然后根据自己的组内编号即可获得对应的 PMI。
步骤 304, 终端根据接收到的 PMI对 SPS业务或类似 SPS业务需要发送 的数据进行预编码并发送。
步骤 305, 基站基于所述终端对应的 PMI接收所述终端发送的 SPS业务 或类似 SPS业务数据。
本发明实施例实现 SPS业务或类似 SPS业务的方法,具有开销小的优点。 举例来说,假设在某个 TTI需要更新 PMI的 SPS业务或类似 SPS业务的终端 有 N个, 系统带宽为 20MHz。 一个 PDCCH DCI 3B可携带 14个终端的 PMI, 则只需要 N/14个 DCI 3B即可通知完所有终端的 PMI,假定一个 PDCCH DCI 3B占用 4CCE, 则此时更新 N个用户的 PMI所需资源为 (N/14 ) *4个 CCE。 可见, 可以大大减少开销。
需要说明的是, 如果采用统计复用的方式, 还可以进一步节省资源。 所 谓统计复用实际上也是时分复用的一种, 全称为统计时分多路复用, 又称异 步时分多路复用。 异步时分复用或统计时分复用是将公共信道的时隙实行按 需分配, 即只对那些需要传送信息或正在工作的终端才分配给时隙, 这样就 使所有的时隙都能充分地得到使用, 可以使服务的终端数大于时隙的个数, 提高了资源的利用率, 从而起到了复用的作用。 例如, 本实施例可以将在步 骤 301 中分给某终端的一个组号和组内编号, 改为多个组号和相对应的多个 组内编号, 在激活 SPS业务或类似 SPS业务时, 指明该终端只能使用多个组 号和相对应的多个组内编号中的一个。
方式二
在该方式中, 利用 PDSCH来携带 PMI信息, 实现下行数据与 PMI的复 用。 具体地, 可以在第 n-k个子帧上的 PDSCH中携带 PMI信息。 若第 n_k个 子帧没有发送 PDSCH, 因为不是每个子帧都需要发送 PDSCH, 则使用前一 次更新的 PMI。其中, n表示当前子帧, k为一个预先定义的值, 比如 k=4等。
如图 4所示, 是本发明实施例采用方式二实现 SPS业务或类似 SPS业务 的方法的流程图, 包括以下步骤:
步骤 401 , 计算终端其 SPS业务或类似 SPS业务支持闭环秩为 1传输模 式所需要的 PMI占用调制符号的个数。
其中, 2'为 ΡΜΙ占用调制符号的个数; 0为 ΡΜΙ原始信息的比特数; Qm n PDSCH
为调制阶数; W为数据的编码码率; μ ' 为 PMI相对于数据调制编码方案 ( MCS, Modulation and Coding Scheme )的偏移,该值由高层信令, 比如 RRC 信令, 半静态通知。
步骤 402, 计算 PMI信道编码后的比特数。
具体地, 可以利用下式进行计算:
其中, 2为 PMI信道编码后的比特数, 为调制阶数。
步骤 403 , 根据计算得到的 ΡΜΙ信道编码后的比特数, 将 ΡΜΙ与数据进 行复用处理。
所述复用处理的过程可以分为两步: ( 1 )分别对数据、 ΡΜΙ进行信道编 码相关处理, 对 ΡΜΙ可采用 RM ( Reed-Muller )编码; ( 2 )将编码后的数据 和 PMI进行复用。 其中第 ( 2 ) 步可有两种实现方式: 一是直接将 PMI信道 编码后的比特放在数据信道编码后比特的前面; 二是将数据信道编码后的最
后 β个比特用 PMI编码后的比特替代。
步骤 404, 将 PMI与数据复用后的比特进行加扰、 调制及资源映射等一 系列处理后发送给终端。
其中, 将 PMI与数据复用后的比特进行加扰、 调制及资源映射等一系列 处理的方法与只有业务数据发送时相同。
步骤 405, 终端对接收到的 PDSCH中的数据与 PMI进行解复用, 分离出 随数据传输的 PMI信息。
步骤 406,将分离出的 PMI信息进行信道译码, 获取 PMI原始信息比特。 步骤 407, 终端在需要发送 SPS业务或类似 SPS业务的子帧上, 使用所 述 PMI原始信息比特对 SPS业务或类似 SPS业务需要发送的数据进行预编码 并发送。
步骤 408, 基站基于所述终端对应的 PMI接收所述终端发送的 SPS业务 或类似 SPS业务数据。
可见, 在本发明实施例中, 将 PMI信息与 PDSCH中发送的下行数据复 用传输, 从而可以节省开销。
方式三
与上述方式二类似, 同样也是在 PDSCH中携带 PMI信息, 但 PMI与下 行数据的复用方式与方式二中不同。
如图 5所示, 是本发明实施例采用方式三实现 SPS业务或类似 SPS业务 的方法的流程图, 包括以下步骤:
步骤 501 , 计算等效传输块的大小, 所述等效传输块包括 PDSCH数据信 息比特、 冗余校验比特及终端支持 SPS业务或类似 SPS业务采用闭环秩为 1 传输模式所需要的 PMI的原始比特。
具体地, 可按下式进行计算:
B' = B + 24 + N ( 3 )
其中, ^为等效传输块的大小, 为 PDSCH数据的传输块大小, 24为冗
余校验比特, N为待传输的 PMI的原始比特数。
步骤 502, 根据所述等效传输块的大小进行码块分割。
步骤 503 , 计算 PMI信道编码后的比特数。
具体地, 可基于下式进行计算:
F = C+ K+ + C K - B" ( 4 )
其中, 为 PMI信道编码后的比特数; C+为大小为 的码块的个数, C 为大小为 的码块的个数, C+与 C-之和为第二步得到的总的码块的个数; K+ 和 的值见现有协议; Β" = β + ^。
步骤 504, 根据计算得到的 ΡΜΙ信道编码后的比特数, 对 ΡΜΙ进行信道 编码。
比: ¾口, 进行 RM编码。
步骤 505,将对 ΡΜΙ进行信道编码后的比特与 PDSCH中的数据块进行复 用, 并做以下处理: 码块分割、 信道编码、 速率匹配、 码块级联。
这些处理与只有业务数据发送时一样,在此不再详细描述。其中, PDSCH 中的数据块附加 CRC校验位。
步骤 506, 将步骤 505处理后得到的比特进行加扰、调制及资源映射等一 系列处理后发送给终端。
其中, 加扰、 调制及资源映射等一系列处理的方法与只有业务数据发送 时一样。
步骤 507, 终端对接收到的 PDSCH中的数据与 PMI进行解复用, 分离出 随数据传输的 PMI信息。
步骤 508, 对分离出的 PMI信息进行信道译码, 获取 PMI的原始信息比 特。
步骤 509, 终端在需要发送 SPS业务或类似 SPS业务的子帧上, 使用所 述 PMI原始信息比特对 SPS业务或类似 SPS业务需要发送的数据进行预编码 并发送。
步骤 510, 基站基于所述终端对应的 PMI接收所述终端发送的 SPS业务 或类似 SPS业务数据。
在本发明实施例中, 将 PMI信息与 PDSCH中发送的下行数据复用传输, 不仅可以节省开销, 而且由于对 PMI信息进行了两次信道编码, 因此还可实 现对 PMI更强的保护。
方式四
在该方式中, 利用 PDCCH DL grant中的域 "TPC command for PUCCH ( PUCCH发射功率控制命令 ) "传输 2bit的 PMI信息, 实现类似 SPS的业务 支持闭环秩为 1的传输模式。 其中, PDCCH DL grant包括 PDCCH DCI格式 1、 1A、 1B、 1D、 2、 2A、 2B、 2C、 或其他新的 DCI格式。 具体地, 可以在 类似 SPS的周期内, 基站每次下发 PDCCH格式 1、 1A、 1B、 1D、 2、 2A、 2B、 2C、 或其他新的 DCI格式时, 在域 "TPC command for PUCCH"中携带 最新的 PMI信息。
相应地, 终端在有 PDCCH DCI格式 1、 1A、 1B、 1D、 2、 2A、 2B、 2C、 或其他新的 DCI格式下发的子帧检测 PDCCH,若检测成功则更新自己保存的 PMI信息。 终端每次要发送类似 SPS业务数据时, 使用最新的 PMI。
如图 6所示, 是本发明实施例采用方式四实现类似 SPS业务的方法的流 程图, 包括以下步骤:
步骤 601 , 基站每次下发 PDCCH时, 将 DCI格式中用于指示 PUCCH发 射功率控制命令的域用于指示最新的两比特 PMI信息。
步骤 602,终端检测 PDCCH的 DCI格式获得最新的 PMI, 更新自己保存 的 PMI信息。
步骤 603 , 终端在需要发送类似 SPS业务的子帧时, 使用保存的最新的 PMI进行预编码。
步骤 604, 基站基于所述终端对应的 PMI接收所述终端发送的类似 SPS 业务数据并对所述数据进行检测。
本发明实施例可以最大程度地重用现有机制, 对现有标准的影响较小, 但由于其使用了 PDCCH的 DCI格式 1、 1A、 1B、 1D、 2、 2A、 2B、 2C、 或 其他新的 DCI格式中的域 "TPC command for PUCCH" , 因而该方式只适用 于周期 PUSCH反馈 CSI这种类似 SPS业务, 即不需要 PUCCH的场景。
方式五
在该方式中, 基站利用分配给类似 SPS 业务的 PUSCH对应的 PHICH ( Physical Hybrid ARQ indicator Channel, 物理混合重传指示信道 ) 资源来发 送 PMI信息, 实现类似 SPS业务支持闭环秩为 1的传输模式。
对于用 SPS机制实现的周期 PUSCH反馈 CSI这种类似 SPS的业务, 其 不需要基站反馈 ACK ( Acknowledgment , 肯定确认) / NACK ( Negative Acknowledgement, 否定确认), 因此 PUSCH对应的 PHICH资源将空闲, 因 此, 可以用其传输上行类似 SPS业务传输需要的 PMI。 终端将在类似 SPS的 周期内检测 PHICH, 若检测成功则更新保存的 PMI。
如图 7所示, 是本发明实施例采用方式五实现类似 SPS业务的方法的流 程图, 包括以下步骤:
步骤 701 , 基站计算类似 SPS业务所占 PUSCH对应的 PHICH资源, 并 将 PMI对应的信息比特通过 PHICH传输。
所述类似 SPS业务所占 PUSCH对应的 PHICH资源的计算方法与现有技 术相同, 在此不再详细描述。
可以将 PMI对应的信息比特当作 PHICH的原始信息比特, 进行 PHICH 传输所需要的一系列发送和接收流程。
步骤 702, 终端对 PHICH进行检测, 获得 PHICH中传送的 PMI信息, 更新保存的 PMI信息。
步骤 703 , 终端在需要发送类似 SPS业务的子帧时, 使用保存的最新的 PMI进行预编码。
步骤 704, 基站基于所述终端对应的 PMI接收所述终端发送的类似 SPS
业务数据并对所述数据进行检测。
需要说明的是, 在上述步骤 701 中, 还可在用现有方法计算类似 SPS业 务所占 PUSCH对应的 PHICH资源的基础上,将计算出来的 PHICH资源对应 的 I路或 Q路资源也分用于传输 PMI信息,可增加支持的 PMI信息的比特数。
该方案对标准的影响也较小, 但由于其利用了 PUSCH对应的 PHICH资 源, 因而只适合不需反馈 PUSCH ACK/NACK的业务, 如周期 PUSCH反馈 CSI。
方式穴
在该方式中, 利用激活 SPS业务或类似 SPS这类业务的 PDCCH信令携 带 PMI , 即使得信令中的 PMI域有效, 并在该域携带 PMI , 该 PMI为基站经 过长期统计获得一个最好的 PMI。
如图 8所示, 是本发明实施例采用方式六实现 SPS业务或类似 SPS业务 的方法的流程图, 包括以下步骤:
步骤 801 , 基站发送激活 SPS业务或类似 SPS这类业务的 PDCCH信令, 并在该信令的 PMI域携带一个 PMI, 该 PMI为长期统计的最适合上行传输的 一个 PMI。
步骤 802,终端接收到用于激活 SPS业务或类似 SPS这类业务的 PDCCH 信令后, 解析该信令中的 PMI域, 获取 PMI信息。
步骤 803 , 终端在每次需要发送 SPS业务或类似 SPS业务的子帧时, 使 用该 PMI进行预编码, 直到收到更新这类业务调度信息的 PDCCH信令或业 务终止。
步骤 804, 基站基于所述终端对应的 PMI接收所述终端发送的类似 SPS 业务数据并对所述数据进行检测。
该方案几乎不需要对现有标准进行改动,即可实现 SPS业务或用 PDCCH 信令激活和译放的类似 SPS业务支持闭环秩为 1的传输模式,有效地提高 SPS 业务或类似 SPS业务性能。
方式七
在该方式中, 设置一个用类似 PHICH信道机制实现的新信道, 在此称之 为 PMI控制信道, 利用该 PMI控制信道发送 PMI, 实现 SPS业务或类似 SPS 业务支持闭环秩为 1的传输模式。
如图 9所示, 是本发明实施例采用方式七实现 SPS业务或类似 SPS业务 的方法的流程图, 包括以下步骤:
步骤 901 , 基站计算 SPS或类似 SPS业务所占 PUSCH对应的 PMI控制 信道资源, 并将 2bit PMI映射到所述 PMI控制信道资源上传输。
首先按现有方法计算该 PUSCH对应的 PMI控制信道的组号和组内号; 然后将该组内与计算出来的组内号成对的那个 PMI控制信道资源也分给该终 端, 所谓成对即指与计算出来的组内号对应的 I路或 Q路资源。
可以将 2bit PMI中的高位映射到所述 PMI控制信道资源上传输, 低位映 射到所述组内号对应的 I路或 Q路对应的 PMI控制信道资源上传输。 或者, 将 2bit PMI中的低位映射到所述 PMI控制信道资源上传输, 高位映射到所述 组内号对应的 I路或 Q路对应的 PMI控制信道资源上传输。
步骤 902, 终端对对应的 PHICH进行检测, 获得 PHICH中传送的 PMI 信息, 更新保存的 PMI信息。
步骤 903 , 终端在需要发送 SPS业务或类似 SPS业务的子帧时, 使用保 存的最新的 PMI进行预编码。
步骤 904, 基站基于所述终端对应的 PMI接收所述终端发送的类似 SPS 业务数据并对所述数据进行检测。
不论上述何种方式, 本发明通过基站动态地通知终端其 SPS业务或类似 SPS业务支持闭环秩为 1传输模式所需要 PMI, 可以使这类业务支持闭环空 分复用秩为 1的 MIMO传输模式, 有效地提高这类业务的传输性能, 进而具 有以下有益效果:
1. 若保持这类业务的吞吐量不变, 在满足误块率 (Block Error Ratio,
BLER )要求的同时可通过功控降低这类用户的发射功率, 从而减小对其他用 户的干扰, 提高整个系统的吞吐量, 同时还能延长 UE电池的寿命;
2. 若不需要降低发射功率, 可在满足误块率要求的同时提高这类业务的 码率, 减小分给这类用户的资源;
3. 对周期 PUSCH反馈 CSI, 提高传输性能可使得 CSI的可靠性得到保 证,同时使周期 PUSCH反馈 CSI这个模式成为 CSI反馈量和资源开销之间的 最佳折中。
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, 所述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。
相应地, 本发明实施例还提供了一种基站和一种终端。
如图 10所示, 是本发明实施例基站的一种结构示意图。
在该实施例中, 所述基站 1000包括:
周期通知单元 1001 , 用于通知所述终端其 SPS或类似 SPS的周期, 以使 所述终端按照所述周期采用闭环秩为 1的传输模式发送 SPS业务或类似 SPS 业务数据;
PMI通知单元 1002,用于动态通知所述终端其 SPS业务或类似 SPS业务 支持闭环秩为 1传输模式所需要的编码矩阵指示符 PMI, 以使所述终端在发 送 SPS业务或类似 SPS业务数据时使用最新接收到的 PMI;
接收单元 1003 ,用于基于闭环秩为 1的传输模式接收所述终端发送的 SPS 业务或类似 SPS业务数据。
本发明实施例的基站, 采用动态方式通知终端其 SPS业务或类似 SPS业 务支持闭环秩为 1传输模式所需要的 PMI, 从而可以使 SPS业务或类似 SPS 业务支持闭环空分复用的 MIMO传输模式, 有效地提升 SPS业务或类似 SPS 业务的传输性能。
在本发明实施例中,所述 PMI通知单元 1003可以采用多种方式实现 PMI
的动态通知。
如图 11所示, 是本发明实施例基站的一种具体实现结构示意图。
与图 10所示实施例的区别在于, 在该实施例中, 所述基站 1100不仅包 括:
与图 10所示实施例中相一致的周期通知单元 1101 , PMI通知单元 1102, 接收单元 1103 , 还包括:
分组单元 1104, 用于对有 SPS业务或类似 SPS业务的终端进行分组, 为 每组分配一个组号, 为所述终端分配一个组内编号, 并将终端所属的组号和 组内编号通知给所述终端。
具体地, 所述分组单元 1104可以按以下任意一种方式, 或者多种方式的 组合对有 SPS业务或类似 SPS业务的终端进行分组:
将对应的 PMI的比特数相同的终端分为同一组;
将对应的 PMI的更新周期相同或者相近的终端分为同一组;
将 SPS业务或类似 SPS业务分配的资源对应的时刻相同或相近的终端分 为同一组;
将 DCI格式 3或 DCI格式 3A对应的 TPC组中的所有终端或者部分终端 分为同一组。
相应地, 所述 PMI通知单元 1102具体用于利用 PDCCH组播各组终端其 SPS业务或类似 SPS业务支持闭环秩为 1传输模式所需要的 PMI。 比如, 可 以设置 PDCCH的 DCI格式 3B或 3C, 其中, DCI格式 3B对应 2比特 PMI, DCI格式 3C对应 4比特 PMI, 利用 PDCCH的 DCI格式 3B或 3C发送各组 终端其 SPS业务支持闭环秩为 1传输模式所需要的 PMI。
当然, 图 10所示的 PMI通知单元 1002还可以有其他具体实现方式, 比 如:
可以将 PMI与 PDSCH中发送的下行数据复用发送; 或者
在每次下发 PDCCH时,将 DCI格式中用于指示 PUCCH发射功率控制命
令的域用于指示最新的两比特 PMI信息; 或者
计算类似 SPS业务所占 PUSCH对应的 PHICH资源 ,并将所述 PMI通过 PHICH发送; 或者
用于将长期统计得到的最好的 PMI放到用于激活 SPS业务或类似 SPS业 务的 PDCCH信令中发送; 或者
设置采用类似 PHICH信道机制的 PMI控制信道, 并利用所述 PMI控制 信道发送所述 PMI。
在各种方式下 PMI的发送过程可参照前面本发明实施例实现 SPS业务或 类似 SPS业务的方法中的描述, 在此不再贅述。
所述 PMI通知单元 1002采用将 PMI与 PDSCH中发送的下行数据复用发 送时的一种优选实施例中 , 所述 PMI通知单元 1002包括:
第一计算子单元, 用于计算所述终端其 SPS业务或类似 SPS业务支持闭 环秩为 1传输模式所需要的 PMI占用调制符号的个数, 并根据所述 PMI占用 调制符号的个数计算 PMI信道编码后的比特数;
第一编码处理子单元, 用于分别对所述数据、 PMI 进行信道编码相关处 理;
第一复用子单元, 用于将编码后的数据和 PMI进行复用;
第一发送子单元, 用于发送复用后的数据和 PMI。
其中, 所述第一复用子单元, 具体用于将 PMI信道编码后的比特放在数 据信道编码后比特的前面; 或者将数据信道编码后的最后与所述 PMI信道编 码后的比特数相同个数的比特用 PMI编码后的比特替代。
所述 PMI通知单元 1002采用将 PMI与 PDSCH中发送的下行数据复用发 送时的另一种优选实施例中 , 所述 PMI通知单元 1002包括:
第二编码处理子单元, 用于根据预先计算得到的 PMI信道编码后的比特 数对 PMI进行信道编码;
第二复用子单元, 用于将信道编码后的 PMI与数据一起复用;
第二发送子单元, 用于发送复用后的 PMI与数据。
除此之外 , 所述 PMI通知单元 1002还可进一步包括:
第二计算子单元, 用于计算 PDSCH等效传输块大小, 所述等效传输块包 括 PDSCH数据信息比特、 冗余校验比特及终端支持 SPS业务或类似 SPS业 务采用闭环秩为 1传输模式所需要的 PMI的信息比特;
码块分割子单元, 用于根据所述等效传输块的大小进行码块分割; 第三计算子单元,用于根据分割后的码块计算 PMI信道编码后的比特数。 所述 PMI通知单元 1002采用在每次下发 PDCCH时,将 DCI格式中用于 指示 PUCCH发射功率控制命令的域用于指示最新的两比特 PMI信息的方式 时的一种优选实施例中 , 所述 PMI通知单元 1002包括:
PDCCH构建子单元, 用于构建 PDCCH时, 将 PDCCH的 DCI格式中用 于指示 PUCCH发射功率控制命令的域用于指示最新的两比特 PMI信息;
PDCCH发送子单元, 用于发送所述 PDCCH构建子单元构建的 PDCCH。 如图 12所示, 是本发明实施例终端的一种结构示意图。
在该实施例中,所述终端 1200包括:发送单元 1201和 PMI获取单元 1202。 其巾:
PMI获取单元 1202,用于获取基站发送的所述 SPS业务或类似 SPS业务 支持闭环秩为 1传输模式所需要的 PMI;
发送单元 1201 , 用于采用闭环秩为 1的传输模式在基站配置的其 SPS周 期内发送 SPS业务或在类似 SPS的周期内发送类似 SPS业务数据, 并在所述 PMI获取单元获取到新的 PMI后, 在基站配置的其 SPS周期内或在类似 SPS 的周期内, 使用所述新的 PMI发送 SPS业务或类似 SPS业务数据。
针对基站发送 PMI的方式不同, 在本发明实施例中, 所述 PMI获取单元 1202也可以有多种实现方式, 比如:
可以从接收的 PDCCH的 DCI格式, 比如 3B或 3C, 获取基站发送的所 述 SPS业务或类似 SPS业务支持闭环秩为 1传输模式所需要的 PMI,所述 DCI
格式 3B对应 2比特 PMI, DCI格式 3C对应 4比特 PMI; 或者
从接收的 PDSCH中获取与下行数据复用发送的所述 SPS业务或类似 SPS 业务支持闭环秩为 1传输模式所需要的 PMI; 或者
从 PDCCH的 DCI格式中用于指示 PUCCH发射功率控制命令的域中获取 所述 SPS业务或类似 SPS业务支持闭环秩为 1传输模式所需要的 PMI; 或者 从 PHICH中获取类似 SPS业务支持闭环秩为 1传输模式所需要的 PMI; 或者
从基站发送的用于激活 SPS业务或类似 SPS业务的 PDCCH信令中获取 SPS业务或类似 SPS业务支持闭环秩为 1传输模式所需要的 PMI; 或者
通过类似 PHICH信道机制的 PMI控制信道获取 SPS业务或类似 SPS业 务支持闭环秩为 1传输模式所需要的 PMI。
在各种方式下 PMI的获取过程可参照前面本发明实施例实现 SPS业务或 类似 SPS业务的方法中的描述, 在此不再贅述。
本发明实施例的终端, 采用闭环秩为 1的传输模式发送 SPS业务或类似 SPS业务数据, 在获取到基站发送的其 SPS业务或类似 SPS业务支持闭环秩 为 1传输模式所需要的 PMI后,在每次发送 SPS业务或类似 SPS业务数据时 使用所述 PMI, 从而可以使 SPS 业务或类似 SPS 业务支持闭环空分复用的 MIMO传输模式, 提升 SPS业务或类似 SPS业务的传输性能。
需要说明的是, 本发实施例的基站和终端并不仅限于上述的各种结构, 其中的各单元或子单元可以是独立的模块, 也可以多个单元或子单元组合在 一个模块中。
以上对本发明实施例进行了详细介绍, 本文中应用了具体实施方式对本 发明进行了阐述, 以上实施例的说明只是用于帮助理解本发明的方法及设备; 同时, 对于本领域的一般技术人员, 依据本发明的思想, 在具体实施方式及 应用范围上均会有改变之处, 综上所述, 本说明书内容不应理解为对本发明 的限制。
Claims
1、一种实现半持续调度业务或类似半持续调度业务的方法,其特征在于, 包括:
通知终端其半持续调度 SPS或类似 SPS的周期, 以使所述终端按照所述 周期采用闭环秩为 1的传输模式发送 SPS业务或类似 SPS业务的数据;
动态通知所述终端其 SPS业务或类似 SPS业务支持闭环秩为 1传输模式 所需要的编码矩阵指示符 PMI, 以使所述终端在发送 SPS业务或类似 SPS业 务数据时使用最新接收到的 PMI;
基于闭环秩为 1的传输模式接收所述终端发送的 SPS业务或类似 SPS业 务数据。
2、 根据权利要求 1所述的方法, 其特征在于, 所述方法还包括: 预先对有 SPS业务或类似 SPS业务的终端进行分组, 为每组分配一个组 号, 为所述终端分配一个组内编号, 并将终端所属的组号和组内编号通知给 所述终端, 以使所述终端根据自己所属的组号检测物理层下行控制信道 PDCCH下行控制信息 DCI格式, 并根据自己的组内编号获得对应的 PMI; 所述动态通知所述终端其 SPS业务或类似 SPS业务支持闭环秩为 1传输 模式所需要的 PMI包括: 组播各组终端其 SPS业务或类似 SPS业务支持闭环秩为 1传输模式所需要的 PMI。
3、 根据权利要求 2所述的方法, 其特征在于, 所述对有 SPS业务或类似 SPS 业务的终端进行分组包括: 按以下任意一种方式, 或者多种方式的组合 对有 SPS业务或类似 SPS业务的终端进行分组:
将对应的 PMI的比特数相同的终端分为同一组;
将对应的 PMI的更新周期相同或者相差在第一预定范围内的终端分为同 一组; 将 SPS业务或类似 SPS业务分配的资源对应的时刻相同或相差在第二预 定范围内的终端分为同一组; 或者部分终端分为同一组。
4、 根据权利要求 2所述的方法, 其特征在于, 所述利用 PDCCH组播各 组终端其 SPS业务或类似 SPS业务支持闭环秩为 1传输模式所需要的 PMI包 括: 采用 PDCCH的 DCI格式 3B或 3C组播各组终端其 SPS业务或类似 SPS 业务支持闭环秩为 1传输模式所需要的 PMI, 其中, DCI格式 3B对应 2比特 PMI, DCI格式 3C对应 4比特 PMI, 所述每组终端的 PMI按照所述组内编号 顺序排列,并且所述 PDCCH的 DCI格式 3B或 3C的负荷与 DCI格式 0的负 荷相同。
5、 根据权利要求 1所述的方法, 其特征在于, 所述动态通知所述终端其 SPS业务或类似 SPS业务支持闭环秩为 1传输模式所需要的 PMI包括:
将所述终端的 SPS业务或类似 SPS业务支持闭环秩为 1传输模式所需要 的 PMI与物理下行共享信道 PDSCH中发送的下行数据复用发送。
6、 根据权利要求 5所述的方法, 其特征在于, 所述将所述终端的 SPS业 务或类似 SPS业务支持闭环秩为 1传输模式所需要的 PMI与 PDSCH中发送 的下行数据复用发送包括:
计算所述终端其 SPS业务或类似 SPS业务支持闭环秩为 1传输模式所需 要的 PMI占用调制符号的个数;
根据所述 PMI占用调制符号的个数计算 PMI信道编码后的比特数; 根据计算得到的 PMI信道编码后的比特数, 将 PMI与 PDSCH中需要发 送的下行数据进行复用处理并发送。
7、 根据权利要求 6所述的方法, 其特征在于, 所述将 PMI与 PDSCH中 需要发送的下行数据进行复用处理包括:
分别对所述下行数据、 PMI进行信道编码相关处理; 将 PMI信道编码后的比特放在下行数据信道编码后的比特的前面, 或者 将下行数据信道编码后的最后与所述 PMI信道编码后的比特数相同个数的比 特用 PMI编码后的比特替代。
8、 根据权利要求 5所述的方法, 其特征在于, 所述将所述终端的 SPS业 务或类似 SPS业务支持闭环秩为 1传输模式所需要的 PMI与 PDSCH中发送 的下行数据复用发送包括:
根据预先计算得到的 PMI信道编码后的比特数对 PMI进行信道编码, 并 将信道编码后的 PMI与 PDSCH中发送的下行数据一起复用发送。
9、 根据权利要求 8所述的方法, 其特征在于, 所述计算得到 PMI信道编 码后的比特数包括:
计算 PDSCH等效传输块大小, 所述等效传输块包括 PDSCH数据信息比 特、 冗余校验比特及终端支持 SPS业务或类似 SPS业务采用闭环秩为 1传输 模式所需要的 PMI的信息比特;
根据所述等效传输块的大小进行码块分割;
根据分割后的码块计算 PMI信道编码后的比特数。
10、 根据权利要求 1 所述的方法, 其特征在于, 所述动态通知所述终端 其类似 SPS业务支持闭环秩为 1传输模式所需要的 PMI包括:
基站每次下发 PDCCH时,将 DCI格式中用于指示 PUCCH发射功率控制 命令的域用于指示所述类似 SPS业务支持闭环秩为 1传输模式所需要的 PMI 最新的两比特信息; 或者
基站计算类似 SPS 业务所占 PUSCH 对应的物理混合重传指示信道 PHICH资源, 并将所述类似 SPS业务支持闭环秩为 1传输模式所需要的 PMI 通过 PHICH发送; 或者
利用设置的 PMI控制信道发送所述类似 SPS业务支持闭环秩为 1传输模 式所需要的 PMI。
11、 一种实现半持续调度业务或类似半持续调度业务的方法, 其特征在 于, 包括:
终端采用闭环秩为 1的传输模式在基站配置的 SPS周期内发送 SPS业务 或在类似 SPS的周期内发送类似 SPS业务数据;
获取所述基站动态通知的所述 SPS业务或类似 SPS业务支持闭环秩为 1 传输模式所需要的新的 PMI, 在所述基站配置的所述 SPS周期内或在所述类 似 SPS的周期内, 使用所述新的 PMI发送 SPS业务或类似 SPS业务数据。
12、 根据权利要求 11所述的方法, 其特征在于, 所述方法还包括: 通过以下任意一种方式获取所述基站动态通知的所述 SPS 业务或类似 SPS业务支持闭环秩为 1传输模式所需要的新的 PMI:
接收所述基站发送的所属的组号和组内编号, 根据所述组号检测接收的
PDCCH的 DCI格式, 并根据所述组内编号获取基站发送的所述 SPS业务或 类似 SPS业务支持闭环秩为 1传输模式所需要的 PMI;
从接收的 PDSCH中获取与下行数据复用发送的所述 SPS业务或类似 SPS 业务支持闭环秩为 1传输模式所需要的 PMI;
从 PDCCH的 DCI格式中用于指示 PUCCH发射功率控制命令的域中获取 所述 SPS业务或类似 SPS业务支持闭环秩为 1传输模式所需要的 PMI;
从 PHICH中获取类似 SPS业务支持闭环秩为 1传输模式所需要的 PMI; 通过预先设置的 PMI控制信道获取 SPS业务或类似 SPS业务支持闭环秩 为 1传输模式所需要的 PMI。
13、 一种基站, 其特征在于, 包括:
周期通知单元, 用于通知所述终端其 SPS或类似 SPS的周期, 以使所述 终端按照所述周期采用闭环秩为 1的传输模式发送 SPS业务或类似 SPS业务 数据;
PMI通知单元, 用于动态通知所述终端其 SPS业务或类似 SPS业务支持 闭环秩为 1传输模式所需要的 PMI,以使所述终端在发送 SPS业务或类似 SPS 业务数据时使用最新接收到的 PMI; 接收单元, 用于基于闭环秩为 1的传输模式接收所述终端发送的 SPS业 务或类似 SPS业务数据, 其中, 所述终端是按照从所述通知单元接收的所述 周期、使用从所述 PMI通知单元最新接收到的 PMI发送所述 SPS业务或类似 SPS业务数据的。
14、 根据权利要求 13所述的基站, 其特征在于, 所述基站还包括: 分组单元, 用于对有 SPS业务或类似 SPS业务的终端进行分组, 为每组 分配一个组号, 为所述终端分配一个组内编号, 并将终端所属的组号和组内 编号通知给所述终端, 以使所述终端根据自己所属的组号检测 PDCCH DCI 格式, 并根据自己的组内编号获得对应的 PMI;
所述 PMI通知单元, 具体用于利用各组的组号对 PDCCH的 CRC加掩, 并利用 PDCCH组播各组终端其 SPS业务或类似 SPS业务支持闭环秩为 1传 输模式所需要的 PMI。
15、 根据权利要求 14所述的基站, 其特征在于,
所述分组单元, 具体用于按以下任意一种方式, 或者多种方式的组合对 有 SPS业务或类似 SPS业务的终端进行分组:
将对应的 PMI的比特数相同的终端分为同一组;
将对应的 PMI的更新周期相同或者相差在第一预定范围内的终端分为同 一组;
将 SPS业务或类似 SPS业务分配的资源对应的时刻相同或相差在第一预 定范围内的终端分为同一组;
将 DCI格式 3或 DCI格式 3A对应的 TPC组中的所有终端或者部分终端 分为同一组。
16、 根据权利要求 13所述的基站, 其特征在于,
所述 PMI通知单元,具体用于将所述终端的 SPS业务或类似 SPS业务支 持闭环秩为 1传输模式所需要的 PMI与 PDSCH中发送的下行数据复用发送。
17、根据权利要求 16所述的基站,其特征在于,所述 PMI通知单元包括: 第一计算子单元, 用于计算所述终端其 SPS业务或类似 SPS业务支持闭 环秩为 1传输模式所需要的 PMI占用调制符号的个数, 并根据所述 PMI占用 调制符号的个数计算 PMI信道编码后的比特数;
第一编码处理子单元, 用于分别对所述下行数据、 PMI 进行信道编码相 关处理;
第一复用子单元,用于接收经所述第一编码处理子单元信道编码后的 PMI 和下行数据, 将 PMI信道编码后的比特放在下行数据信道编码后的比特的前 面; 或者将下行数据信道编码后的最后与所述第一计算子单元计算的 PMI信 道编码后的比特数相同个数的比特用 PMI信道编码后的比特替代;
第一发送子单元, 用于发送经所述第一复用子单元复用后的下行数据和
PMI。
18、根据权利要求 16所述的基站,其特征在于,所述 PMI通知单元包括: 第二编码处理子单元, 用于根据预先计算得到的 PMI信道编码后的比特 数对 PMI进行信道编码;
第二复用子单元, 用于将所述第二编码处理子单元信道编码后的 PMI与
PDSCH中发送的下行数据一起复用;
第二发送子单元,用于发送所述第二复用子单元复用后的 PMI与 PDSCH 中发送的下行数据。
19、 根据权利要求 18所述的基站, 其特征在于, 所述 PMI通知单元还包 括:
第二计算子单元, 用于计算 PDSCH等效传输块大小, 所述等效传输块包 括 PDSCH数据信息比特、 冗余校验比特及终端支持 SPS业务或类似 SPS业 务采用闭环秩为 1传输模式所需要的 PMI的信息比特;
码块分割子单元, 用于根据所述第二计算子单元计算出的所述等效传输 块的大小进行码块分割;
第三计算子单元, 用于根据所述码块分割子单元分割后的码块计算 PMI 信道编码后的比特数, 并将得到的 PMI信道编码后的比特数传送给所述第二 编码处理子单元。
20、根据权利要求 13所述的基站,其特征在于,所述 PMI通知单元包括: PDCCH构建子单元, 用于构建 PDCCH时, 将 PDCCH的 DCI格式中用 于指示 PUCCH发射功率控制命令的域用于指示所述类似 SPS业务支持闭环 秩为 1传输模式所需要的 PMI最新的两比特信息;
PDCCH发送子单元, 用于发送所述 PDCCH构建子单元构建的 PDCCH。
21、 根据权利要求 13所述的基站, 其特征在于,
所述 PMI通知单元, 具体用于计算类似 SPS 业务所占 PUSCH对应的 PHICH资源, 并将所述 PMI通过 PHICH发送; 或者具体用于将长期统计得 到的最好的 PMI放到用于激活 SPS业务或类似 SPS业务的 PDCCH信令中发 送; 或者具体用于利用预先设置的 PMI控制信道发送所述 PMI。
22、 一种终端, 其特征在于, 包括:
PMI获取单元, 用于获取基站动态通知的所述 SPS业务或类似 SPS业务 支持闭环秩为 1传输模式所需要的 PMI;
发送单元, 用于采用闭环秩为 1的传输模式在基站配置的 SPS周期内发 送 SPS业务或在类似 SPS的周期内发送类似 SPS业务数据, 并在所述 PMI 获取单元获取到新的 PMI后,在基站配置的所述 SPS周期内或在所述类似 SPS 的周期内, 使用所述新的 PMI发送 SPS业务或类似 SPS业务数据。
23、 根据权利要求 22所述的终端, 其特征在于,
所述 PMI获取单元, 具体用于从接收的 PDCCH的 DCI格式获取基站发 送的所述 SPS业务或类似 SPS业务支持闭环秩为 1传输模式所需要的 PMI, 所述 DCI格式 3B对应 2比特 PMI, DCI格式 3C对应 4比特 PMI; 或者
所述 PMI获取单元, 具体用于从接收的 PDSCH中获取与下行数据复用 发送的所述 SPS业务或类似 SPS业务支持闭环秩为 1传输模式所需要的 PMI; 或者 所述 PMI获取单元,具体用于从 PDCCH的 DCI格式中用于指示 PUCCH 发射功率控制命令的域中获取所述 SPS业务或类似 SPS业务支持闭环秩为 1 传输模式所需要的 PMI; 或者
所述 PMI获取单元, 具体用于从 PHICH中获取类似 SPS业务支持闭环 秩为 1传输模式所需要的 PMI; 或者
所述 PMI获取单元,具体用于通过预先配置的 PMI控制信道获取 SPS业 务或类似 SPS业务支持闭环秩为 1传输模式所需要的 PMI。
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- 2011-02-11 RU RU2012138697/08A patent/RU2527749C2/ru not_active IP Right Cessation
- 2011-02-11 WO PCT/CN2011/070944 patent/WO2011098047A1/zh not_active Ceased
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2012
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| CN101646239A (zh) * | 2008-08-06 | 2010-02-10 | 中兴通讯股份有限公司 | 一种半持久调度的方法 |
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| US20210212101A1 (en) * | 2018-09-21 | 2021-07-08 | Zte Corporation | Methods, apparatus and systems for improving scheduling flexibility in a wireless communication |
| US12069671B2 (en) * | 2018-09-21 | 2024-08-20 | Zte Corporation | Methods, apparatus and systems for improving scheduling flexibility in a wireless communication |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2525512B1 (en) | 2016-04-20 |
| CN102158971B (zh) | 2014-11-05 |
| EP2525512A1 (en) | 2012-11-21 |
| CN102158971A (zh) | 2011-08-17 |
| US20120309402A1 (en) | 2012-12-06 |
| EP2525512A4 (en) | 2013-01-09 |
| RU2012138697A (ru) | 2014-03-20 |
| RU2527749C2 (ru) | 2014-09-10 |
| US8615248B2 (en) | 2013-12-24 |
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