WO2015042885A1 - Method to report the channel status - Google Patents

Method to report the channel status Download PDF

Info

Publication number
WO2015042885A1
WO2015042885A1 PCT/CN2013/084497 CN2013084497W WO2015042885A1 WO 2015042885 A1 WO2015042885 A1 WO 2015042885A1 CN 2013084497 W CN2013084497 W CN 2013084497W WO 2015042885 A1 WO2015042885 A1 WO 2015042885A1
Authority
WO
WIPO (PCT)
Prior art keywords
csr
channel status
mobile station
mac
network
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2013/084497
Other languages
French (fr)
Inventor
Yuanyuan Zhang
Feifei SUN
Chia-Chun Hsu
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
MediaTek Singapore Pte Ltd
Original Assignee
MediaTek Singapore Pte Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by MediaTek Singapore Pte Ltd filed Critical MediaTek Singapore Pte Ltd
Priority to PCT/CN2013/084497 priority Critical patent/WO2015042885A1/en
Priority to PCT/CN2014/087559 priority patent/WO2015043509A1/en
Priority to US14/784,321 priority patent/US9924544B2/en
Priority to CN201480050474.5A priority patent/CN105532060A/en
Priority to EP14847919.9A priority patent/EP3050377A4/en
Publication of WO2015042885A1 publication Critical patent/WO2015042885A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L2101/00—Indexing scheme associated with group H04L61/00
    • H04L2101/60—Types of network addresses
    • H04L2101/618—Details of network addresses
    • H04L2101/622—Layer-2 addresses, e.g. medium access control [MAC] addresses
    • 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
    • H04L5/0053—Allocation of signalling, i.e. of overhead other than pilot signals
    • H04L5/0057—Physical resource allocation for CQI
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices

Definitions

  • This disclosure relates generally to wireless communications and, more particularly, to report the channel status.
  • Machine-to-Machine (M2M) applications required low-cost devices and improved coverage other than current cellular communication system.
  • M2M Machine-to-Machine
  • some smart-metering deceives suffer a significantly larger path-loss (e.g., 20dB path loss) than that in the typical operation condition of normal devices, which are often installed in the basements of residential buildings or locations shielded by foil-backed insulation, metalized windows, or traditional thick-walled building construction.
  • 3GPP 3rd generation partnership project
  • RANI 3rd generation partnership project
  • Some potential solutions have been identified such as repetition of the physical channels to improve the coverage.
  • CSR CSR
  • the CSR can be used as assistant information and used by the network for radio resource allocation. Therefore, it is important to have a method to report the CSR. The benefit of reporting channel status is not limited to the examples above.
  • Methods and device for a mobile station to report channel status are provided.
  • the method comprising: triggering a CSR when certain event occurs; transmitting a CSR with one of the at least one UL resource; and canceling the triggered CSR.
  • the events include but not limited to the following ones: 1) the mobile station is performing initial access to the network or re-establishment through random access procedure; 2) the channel status has changed since the last transmission of a CSR; 3) the channel status has changed more than a threshold since the last transmission of a CSR, wherein the threshold is configured by the network; 4) a request for CSR is received from the network; 5) the coverage problem is detected.
  • triggering a CSR when the mobile station is performing initial access or re-establishment to the network through random access procedure further comprising: obtaining the value of the channel status from the physical layer when an UL grant is received in the random access response; transmitting the a CSR with the one of the at least one UL resource in Msg3; and canceling the triggered CSR.
  • triggering a CSR upon the occurrence of the events further comprising: starting or re- starting a timer after a CSR is triggered; stopping the timer when the CSR is transmitted; triggering a scheduling request for UL radio resources when the timer expires; and sending a scheduling request to the network.
  • triggering a CSR upon the occurrence of the events further comprising: determining whether there is potential UL radio resource available for CSR after a CSR is triggered; starting or re-starting timer if there is no potential UL radio resource; stopping the timer when the CSR is transmitted; triggering a scheduling request for UL radio resources when the timer expires; and sending a scheduling request to the network.
  • the method comprising: sending a NAS message to the network when certain events occur; obtaining the value of the channel status from the lower layer.
  • the events include but not limited to the following ones: 1) the channel status has changed; 2) the channel status has changed more than a threshold; 3) the coverage problem is detected.
  • sending a NAS message to the network further comprising: initiating the tracking area updating procedure, and sending the TRACKING AREA UPDATE REQUEST message containing the IE for channel status to the network.
  • Figure 1 illustrates a wireless communication system and exemplary block diagrams of UE and eNB in accordance with embodiments of the invention.
  • Figure 2 illustrates a flowchart of an example for a mobile station to report the channel status in accordance with embodiments of the current invention.
  • Figure 3a illustrates an example of the MAC CE for CSR in accordance with embodiments of the current invention.
  • Figure 3b illustrated an example of the MAC CE for CSR transmitted through Msg 3 in accordance with embodiments of the current invention.
  • Figure 4 illustrates a flowchart of an example for a mobile station to transmit CSR in accordance with embodiments of the current invention.
  • Figure 5 illustrates a flowchart for a mobile station to report channel status during initial random access in accordance with embodiments of the current invention.
  • Figure 6 illustrates a flowchart of an example for a mobile station to report channel status after RRC connection is established in accordance with embodiments of the current invention.
  • Figure 7 illustrates a flowchart of an example for a mobile station to request UL resource for CSR through triggering and sending scheduling request in accordance with embodiments of the current invention.
  • Figure 8 illustrates a flowchart of another example for a mobile station to request UL resource for CSR through triggering and sending scheduling request in accordance with embodiments of the current invention.
  • Figure 9 illustrates a flowchart of an example for a mobile station to send scheduling request for CSR report in accordance with embodiments of the current invention.
  • Figure 10 illustrates a flowchart of an example for a mobile station to report channel status through NAS procedure in accordance with embodiments of the current invention.
  • Figure 1 illustrates a wireless communication system and exemplary block diagrams of UE and eNB in accordance with embodiments of the invention.
  • the wireless communication system 100 includes one or more fixed base infrastructure units forming a network distributed over a geographical region.
  • the base unit may also be referred to as an access point, access terminal, base station, Node-B, eNode-B, or by other terminology used in the art.
  • the one or more base stations 101 and 102 serve a number of mobile stations 103 and 104 within a serving area, for example, a cell, or within a cell sector.
  • one or more base stations are communicably coupled to a controller forming an access network that is communicably coupled to one or more core networks.
  • the disclosure is not intended to be limited to any particular wireless communication system.
  • the serving base station 101 and 102 transmit downlink communication signals 112 and 113 to mobile station in the time and/or frequency domain.
  • UE or Mobile station 103 and 104 communicate with one or more base units 101 and 102 via uplink communication signals 113 and 114.
  • UE or the mobile station may also be referred to a mobile phone, laptop, and mobile work station and so on.
  • the mobile communication network 100 is an OFDM/OFDMA system comprising a base station eNB 101 eNB 102 and a plurality of mobile station 103 and mobile station 104.
  • each mobile station gets a downlink assignment, e.g., a set of radio resources in a physical downlink shared channel (PDSCH).
  • PDSCH physical downlink shared channel
  • the mobile station gets a grant from the eNB that assigns a physical downlink uplink shared channel (PUSCH) consisting of a set of uplink radio resources.
  • the mobile station gets the downlink or uplink scheduling information from a physical downlink control channel (PDCCH) or an enhanced physical downlink control channel (EPDCCH) that is targeted specifically to that mobile station.
  • PDCCH physical downlink control channel
  • EDCCH enhanced physical downlink control channel
  • DCI downlink control information
  • Figure 1 further shows exemplary block diagrams illustrating protocol stacks of UE 103, and eNB 101.
  • UE 103 has a physical layer stack (PHY), Mac layer (MAC), Radio Link Control (RLC), Packet Data Control Protocol (PDCP) and Radio Resource Control (RRC).
  • Figure 1 further shows exemplary block diagrams of UE 103 and eNB 101 that supports some embodiments of the present invention.
  • UE 103 has RF transceiver module 150, coupled with antenna 171 receives RF signals from antenna 171, converts them to baseband signals and sends them to processor 151.
  • RF transceiver 150 also converts received baseband signals from the processor 151, converts them to RF signals, and sends out to antenna 171.
  • Processor 151 processes the received baseband signals and invokes different functional modules to perform features in UE 103.
  • Memory 152 stores program instructions and data to control the operations of UE 103.
  • Figure 1 further illustrates seven functional modules 153 to 154, the MAC module could process the operation of MAC layer, and the lower layer module 154 process the operation of lower layer.
  • eNB 101 has RF transceiver module 160, coupled with antenna 172 receives RF signals from antenna 172, converts them to baseband signals and sends them to processor 161.
  • RF transceiver 160 also converts received baseband signals from the processor 161, converts them to RF signals, and sends out to antenna 172.
  • Processor 161 processes the received baseband signals and invokes different functional modules to perform features in eNB 101.
  • Memory 162 stores program instructions and data to control the operations of eNB 101.
  • Figure 1 further illustrates six functional modules 163 to 164 in eNB 101 that carry out embodiments of the current invention.
  • the MAC module 163 could process the operation of MAC layer, and the lower layer module 164 could process the operation of lower layer. And the other modules are omitted here.
  • the other modules corresponding to UE are omitted here.
  • the communication system utilizes MAC layer to control the upper layers' access to the communication medium.
  • MAC layer decides how much radio resource should be allocated to data from which logical channel of which mobile station.
  • the MAC layer performs assistant information reporting such as buffer status reporting(BSR) and power headroom reporting(PHR) for network scheduling, multiplexing and de-multiplexing to combine and disassemble upper layer data unites into/out of lower layer data unites and HARQ to transfer data units over the radio interface.
  • assistant information reporting such as buffer status reporting(BSR) and power headroom reporting(PHR) for network scheduling, multiplexing and de-multiplexing to combine and disassemble upper layer data unites into/out of lower layer data unites and HARQ to transfer data units over the radio interface.
  • Exemplary of MAC layer includes the developing Long Term Evolution (LTE) of the 3GPP UMTS standard and IEEE 802.16 standard.
  • PDCCH or EPDCCH may need repetitions across multiple subframes.
  • the PDSCH and/or PUSCH of the devices may also need across sub frame (re)transmission (or repetitions).
  • a method to report the channel status is necessary. The channel situation is evaluated by measuring the DL reference signals, through which RSRP, RSRQ, RSSI, CQI as well as other metrics used for channel quality evaluation can be derived. These measurement results can be reported directly as channel status. Or the measurement results within a certain range can be quantified into different coverage levels and each level is assigned a channel status index. The reported channel status index and the corresponding coverage levels are defined in the specification.
  • a method for a mobile station to report the channel status includes: triggering a CSR when certain event occurs; obtaining the value of the channel status from the lower layer when there is at least one UL resource for new transmission; transmitting a CSR with one of the at least one UL resource; and canceling the triggered CSR.
  • the events include but not limited to the following ones: 1) the mobile station is performing initial access or re-establishment to the network through random access procedure; 2) the channel status has changed since the last transmission of CSR; 3) the channel status has changed more than a threshold since the last transmission of CSR, wherein the threshold is configured by the network; 4) a request for CSR is received from the network; 5) the coverage problem is detected, e.g.
  • the channel quality is worse than a predefined threshold.
  • the threshold could be set to different value according with different situation.
  • the mobile station uses a special PRACH resource or when it can't detect normal mode downlink physical channel (e.g, PBCH, PDCCH, PDSCH, and PHICH) for a period of time or when the channel quality is worse than a predefined threshold, it can determine that a coverage problem occurs.
  • normal mode downlink physical channel e.g, PBCH, PDCCH, PDSCH, and PHICH
  • a method for a mobile station to transmitting a CSR further comprising: instructing the Multiplexing and Assembly procedure to generate the CSR MAC control element(CE) if the allocated UL resources can accommodate a CSR MAC CE plus its subheader.
  • the UL resources used for CSR transmission should be allocated by the network, which can be assigned semi-persistently through configuration or assigned dynamically through UL grants.
  • One example of the MAC CE is that it has a fixed size of zero bits with two reserved bits in the subheader used to indicate four levels of channel status.
  • Another example of the MAC CE is that it has a fixed size of one byte. Some bits are used as the fields of CSR, while others are reserved bits.
  • a new LCID is assigned to the MAC CE for CSR.
  • the mobile station when performing multiplexing and assembling to generate the CSR MAC CE, the mobile station takes into account the following relative priority in decreasing order: MAC CE for C-RNTI or data from UL-CCCH; MAC CE for BSR, with exception of BSR included for padding; MAC CE for CSR; other MAC CE and data from other logical channels except UL-CCCH.
  • CRS MAC CE takes precedence over other MAC CE and data from other logical channels, but has lower priority than MAC CE for C-RNTI or data from UL-CCCH as well as MAC CE for BSR, with exception of BSR included for padding.
  • a method for a mobile station to report the channel status includes: triggering a CSR upon initiating random access procedure, e.g. upon transmission of random access preamble; obtaining the value of the channel status from the physical layer when UL grant is received in the random access response; transmitting the a CSR with the allocated UL resources in the Message subsequent to random access response such as Msg3 and canceling the triggered CSR.
  • a method for a mobile station to transmit a CSR in Msg3 further comprising: instructing the Multiplexing and Assembly procedure to generate the CSR MAC CE; and placing the MAC CE at the beginning of the MAC PDU.
  • the MAC CE has a fixed size of one byte with any subheader.
  • a method for a mobile station to placing the MAC CE at the beginning of a MAC PDU further comprising: checking whether the allocated UL resources can accommodate other higher priority MAC SDUs/MAC CE as well as the corresponding subheaders together with the CSR MAC CE; placing the CSR MAC CE at the beginning of the MAC PDU if the allocated UL resources can accommodate; otherwise waiting for another UL grant for CSR transmission.
  • the mobile station After the communication between the mobile station and the network is established, i.e. the mobile station is in the RRC_CONNECTED state and performing data transfer to/from the network, the mobile station needs to monitor its channel situation and report the channel status timely upon detection that the channel status has changed or has changed more than a threshold since the last transmission of a CSR.
  • the threshold can be configured by the network. If the channel status is reported during the initial random access through Msg3, the channel status is considered as the very first transmission.
  • a method for a mobile station to report the channel status after initial random access further comprising: monitoring the channel situation; triggering a CSR when the channel status has changed or has changed more than a threshold since the last transmission of a CSR; obtaining the value of the channel status from the physical layer when there is at least one UL resource for new transmission; transmitting a CSR; and canceling the triggered CSR.
  • a method for a mobile station to report the channel status after initial random access further comprising: monitoring the request for CSR sent from the network; triggering a CSR when the request is received; obtaining the value of the channel status from the physical layer when having UL resource for new transmission; transmitting a CSR; and canceling the triggered CSR.
  • the there is no UL resource available to transmit the CSR It is possible that the there is no UL resource available to transmit the CSR.
  • One example of the case is that only DL traffic is transferred from the network to the mobile station and there are no UL services.
  • Another example of the case is that the channel status of the mobile station becomes worse and the UL grant still can't be received after several repetitions.
  • even a CSR is triggered there won't be UL resource available to transmit the CSR.
  • the triggered CSR remains pending until it is transmitted.
  • scheduling request will be required to be sent to the network if there is no UL resource available.
  • a method for a mobile station to report the channel status further comprising: starting or re- starting a timer after a CSR is triggered; stopping the timer when the CSR is transmitted; triggering a scheduling request for UL radio resources when the timer expires; and sending a scheduling request to the network.
  • a method for a mobile station to report the channel status further comprising: determining whether there is potential UL radio resource available for CSR after a CSR is triggered; starting or re-starting timer if there is no potential UL radio resource; stopping the timer when the CSR is transmitted; triggering a scheduling request for UL radio resources when the timer expires; and sending a scheduling request to the network. Determining whether there is potential UL radio resource available for CSR should consider the occurrence of the following conditions: whether there is pre-configured UL radio resources, such as dedicated UL resources configured for semi-persistent scheduling; and whether there is any pending SR. If there is a pre-configured UL radio resource or there is SR pending, the mobile station will transmit the channel status with the configured UL resources or the UL resources requested from the network. Otherwise, the mobile station considers that there is no potential UL radio resource available.
  • RA-SR dedicated-SR
  • RACH random access channel
  • a method for a mobile station to send scheduling request comprising: utilizing RA-SR if there is no D-SR configured or the channel status becomes worse or it becomes worse than a pre-defined threshold; otherwise utilizing D-SR.
  • the communication system utilizes NAS layer for mobility management and session management.
  • NAS layer support the mobility of the mobile station and session management procedure to establish and maintain IP connectivity between the mobile station and the core network.
  • Exemplary of NAS layer includes the developing Long Term Evolution (LTE) of the 3GPP UMTS standard.
  • a method for a mobile station to report the channel status includes: sending a NAS message to the network when certain events occurs; obtaining the value of the channel status from the lower layer.
  • the events include but not limited to the following ones: 1) the channel status has changed; 2) the channel status has changed more than a threshold; 3) the coverage problem is detected, e.g. the channel quality is worse than a predefined threshold.
  • a method for a mobile station to sending a NAS message to the network further comprising: initiate the tracking area updating procedure, and sending the TRACKING AREA UPDATE REQUEST message containing the IE for channel status to the network.
  • Figure 2 illustrates a flowchart of an example for a mobile station to report the channel status in accordance with embodiments of the current invention.
  • the mobile station monitors the occurrence of at least one triggering event in step 201. If the at least one triggering event occur 202, the mobile station triggers a CSR in step 203. If the mobile station has UL resource available for new transmission 204, it will obtain the channel status value from the lower layer in step 205. Then the mobile station transmits the CSR with the allocated UL resources in step 206 and cancels all the triggered CSR in step 207.
  • Figure 3a illustrates an example of the MAC CE for CSR for the present invention in accordance with embodiments of the current invention.
  • the MAC CE 303 has a fixed size of zero bits with two reserved bits e.g. 301 in the subheader used to indicate four levels of channel status.
  • a new LCID 302 is assigned to the MAC CE for CSR.
  • the MAC CE 313 has a fixed size of one byte. Five bits 312 are the fields of CSR, while others are reserved bits.
  • Figure 3b illustrated an example of the MAC CE for CSR transmitted through Msg 3 in accordance with embodiments of the current invention.
  • the MAC CE 321 has a fixed size of eight bits placed at the beginning of a MAC PDU, i.e. MAC header 322 and MAC payload 323.
  • Figure 4 illustrates a flowchart of an example for a mobile station to transmit CSR in step 206. If the allocated UL resource(s) can accommodate the CSR MAC CE in step 401, the mobile station will instruct the multiplexing and assembly procedure to generate the MAC CE in step 402. Otherwise, it continues monitoring the UL grant and go to step 204.
  • FIG. 5 illustrates a flowchart for a mobile station to report channel status during initial random access in accordance with embodiments of the current invention.
  • the mobile station performs initial random access to the network in step 501, such as transmitting preamble, it triggers a CSR in step 502. If random access response is received in step 503, the mobile station will obtain the value of channel status in step 504, indicate to the Multiplexing and assembly entity to include a CSR MAC CE in Msg3 in step 505, obtain the MAC PDU to transmit from the "Multiplexing and assembly" entity and store it in the Msg3 buffer in step 506.
  • FIG. 6 illustrates a flowchart of an example for a mobile station to report channel status after RRC connection is established in accordance with embodiments of the current invention.
  • the CSR transmitted in Msg3 is considered as the very first transmission.
  • the mobile station monitors the channel status in step 601. If the channel status has changed more than a pre-defined threshold 602, a CSR is triggered in step 603. If there is UL resource available for new transmission 604, the mobile station will obtaining the CSR value from the physical layer and transmitting the CSR with the allocated resources, in step 605 and 606 respectively. Then all triggered CSR is cancelled in 607.
  • FIG. 7 illustrates a flowchart of an example for a mobile station to request UL resource for CSR through triggering and sending scheduling request in accordance with embodiments of the current invention.
  • the mobile station triggers a CSR in step 701. It starts or restarting a timer in step 702 and monitors UL grant continuously 703. If UL grant for new transmission is received in step 704, the mobile station transmits the CSR with the allocated resource in step 705 and stops the timer in step 706. Otherwise, the mobile station checks whether the timer expires or not. If the timer expires in step 707, it will trigger and send scheduling request to the network in step 708. Otherwise, it continues monitoring UL grants until the timer expires in step 703.
  • FIG 8 illustrates a flowchart of another example for a mobile station to request UL resource for CSR through triggering and sending scheduling request in accordance with embodiments of the current invention.
  • the mobile station triggers a CSR in step 801. It determines whether there is at least one potential UL resource available in step 802, which considers two conditions, i.e. whether there is configured UL resource in step 820 and whether there is any pending scheduling request in step 821. If there is potential UL resource available in step 803, the mobile station would utilize the potential UL resource for CSR transmission in step 805. Otherwise, it starts or restarting a timer in step 804 and monitors UL grant continuously in step 806.
  • the mobile station transmits the CSR with the allocated resource in step 808 and stops the timer in step 809. Otherwise, the mobile station checks whether the timer expires or not in step 810. If the timer expires, it will trigger and send scheduling request to the network in step 811. Otherwise, it continues monitoring UL grants until the timer expires in step 806.
  • FIG 9 illustrates a flowchart of an example for a mobile station to send scheduling request for CSR report in accordance with embodiments of the current invention.
  • the mobile station triggers a scheduling request for CSR report, it checks whether there is dedicated SR configured in step 901. If no dedicated SR is configured, it will utilize RA-SR in step 903. Otherwise, it checks further whether channel status becomes worse or worse than a predefined threshold in step 902. If the channel status becomes better or doesn't become worse than a threshold, it will utilize D-SR in step 904.
  • FIG 10 illustrates a flowchart of an example for a mobile station to report channel status through NAS procedure in accordance with embodiments of the current invention.
  • the mobile station monitors the occurrence of the triggering events in step 1001. If the triggering events occur in step 1002, the mobile station initiates tracking area update procedure in step 1003. Then it obtains the channel status value from the lower layer in step 1004 and transmits TRACKING AREA UPDATE REQUEST message to network containing the CSR.

Landscapes

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

Abstract

These disclosed embodiments describe a method for a mobile station to report the channel status to the network, the method comprising: triggering a CSR when certain event occurs; obtaining the value of the channel status from the physical layer when having UL resource for new transmission; transmitting a CSR with the allocated UL resource; and canceling the triggered CSR. In one embodiment, a method for a mobile station to report the channel status is that the report is transmitted in Msg3 during the initial random access. In one embodiment, a method for a mobile station to report the channel status after initial random access further comprising: monitoring the channel situation; triggering a CSR when the channel status has changed or has changed more than a threshold since the last transmission of a CSR; obtaining the value of the channel status from the physical layer when having UL resource for new transmission; transmitting a CSR; and canceling the triggered CSR. In another embodiment, a method for a mobile station to report the channel status further comprising if there is no UL radio resource available for CSR transmission, scheduling request will be triggered.

Description

METHOD TO REPORT THE CHANNEL STATUS
FIELD OF INVENTION
This disclosure relates generally to wireless communications and, more particularly, to report the channel status.
BACKGROUND OF THE INVENTION
Machine-to-Machine (M2M) applications required low-cost devices and improved coverage other than current cellular communication system. For example, some smart-metering deceives suffer a significantly larger path-loss (e.g., 20dB path loss) than that in the typical operation condition of normal devices, which are often installed in the basements of residential buildings or locations shielded by foil-backed insulation, metalized windows, or traditional thick-walled building construction. In order to serve these devices, 3rd generation partnership project (3GPP) RANI working group have studied for coverage improvement and cost reduction for these MTC devices in coverage hole scenario. Some potential solutions have been identified such as repetition of the physical channels to improve the coverage. In addition, cost reduction techniques are studied, including reducing the data buffer size and operation bandwidth, reducing receiving the antenna number and so on. In order to access and serve such devices with proper allocation of radio resources i.e. the repetition number of each physical channel as well as the corresponding transmission power, the channel status should be reported by the devices. The CSR (CSR) can be used as assistant information and used by the network for radio resource allocation. Therefore, it is important to have a method to report the CSR. The benefit of reporting channel status is not limited to the examples above.
SUMMARY OF THE INVENTION
Methods and device for a mobile station to report channel status are provided.
In one novel aspect, the method comprising: triggering a CSR when certain event occurs; transmitting a CSR with one of the at least one UL resource; and canceling the triggered CSR. The events include but not limited to the following ones: 1) the mobile station is performing initial access to the network or re-establishment through random access procedure; 2) the channel status has changed since the last transmission of a CSR; 3) the channel status has changed more than a threshold since the last transmission of a CSR, wherein the threshold is configured by the network; 4) a request for CSR is received from the network; 5) the coverage problem is detected.
In one example, wherein triggering a CSR when the mobile station is performing initial access or re-establishment to the network through random access procedure further comprising: obtaining the value of the channel status from the physical layer when an UL grant is received in the random access response; transmitting the a CSR with the one of the at least one UL resource in Msg3; and canceling the triggered CSR.
In another example, wherein triggering a CSR upon the occurrence of the events further comprising: starting or re- starting a timer after a CSR is triggered; stopping the timer when the CSR is transmitted; triggering a scheduling request for UL radio resources when the timer expires; and sending a scheduling request to the network.
In another example, wherein triggering a CSR upon the occurrence of the events further comprising: determining whether there is potential UL radio resource available for CSR after a CSR is triggered; starting or re-starting timer if there is no potential UL radio resource; stopping the timer when the CSR is transmitted; triggering a scheduling request for UL radio resources when the timer expires; and sending a scheduling request to the network.
In one novel aspect, the method comprising: sending a NAS message to the network when certain events occur; obtaining the value of the channel status from the lower layer. The events include but not limited to the following ones: 1) the channel status has changed; 2) the channel status has changed more than a threshold; 3) the coverage problem is detected.
In one example, wherein sending a NAS message to the network further comprising: initiating the tracking area updating procedure, and sending the TRACKING AREA UPDATE REQUEST message containing the IE for channel status to the network.
Other embodiments and advantages are described in the detailed description below. This summary does not purport to define the invention. The invention is defined by the claims.
BRIEF DESCRIPTION OF THE DRAWINGS
The accompanying drawings, where like numerals indicate like components, illustrate embodiments of the invention.
Figure 1 illustrates a wireless communication system and exemplary block diagrams of UE and eNB in accordance with embodiments of the invention.
Figure 2 illustrates a flowchart of an example for a mobile station to report the channel status in accordance with embodiments of the current invention.
Figure 3a illustrates an example of the MAC CE for CSR in accordance with embodiments of the current invention. Figure 3b illustrated an example of the MAC CE for CSR transmitted through Msg 3 in accordance with embodiments of the current invention.
Figure 4 illustrates a flowchart of an example for a mobile station to transmit CSR in accordance with embodiments of the current invention.
Figure 5 illustrates a flowchart for a mobile station to report channel status during initial random access in accordance with embodiments of the current invention.
Figure 6 illustrates a flowchart of an example for a mobile station to report channel status after RRC connection is established in accordance with embodiments of the current invention.
Figure 7 illustrates a flowchart of an example for a mobile station to request UL resource for CSR through triggering and sending scheduling request in accordance with embodiments of the current invention.
Figure 8 illustrates a flowchart of another example for a mobile station to request UL resource for CSR through triggering and sending scheduling request in accordance with embodiments of the current invention.
Figure 9 illustrates a flowchart of an example for a mobile station to send scheduling request for CSR report in accordance with embodiments of the current invention.
Figure 10 illustrates a flowchart of an example for a mobile station to report channel status through NAS procedure in accordance with embodiments of the current invention. DETAILED DESCRIPTION
Reference will now be made in detail to some embodiments of the invention, examples of which are illustrated in the accompanying drawings.
Figure 1 illustrates a wireless communication system and exemplary block diagrams of UE and eNB in accordance with embodiments of the invention.. In Figure 1, the wireless communication system 100 includes one or more fixed base infrastructure units forming a network distributed over a geographical region. The base unit may also be referred to as an access point, access terminal, base station, Node-B, eNode-B, or by other terminology used in the art. In Figure 1, the one or more base stations 101 and 102 serve a number of mobile stations 103 and 104 within a serving area, for example, a cell, or within a cell sector. In some systems, one or more base stations are communicably coupled to a controller forming an access network that is communicably coupled to one or more core networks. The disclosure however is not intended to be limited to any particular wireless communication system.
Generally, the serving base station 101 and 102 transmit downlink communication signals 112 and 113 to mobile station in the time and/or frequency domain. UE or Mobile station 103 and 104 communicate with one or more base units 101 and 102 via uplink communication signals 113 and 114. UE or the mobile station may also be referred to a mobile phone, laptop, and mobile work station and so on. In Figure 1, the mobile communication network 100 is an OFDM/OFDMA system comprising a base station eNB 101 eNB 102 and a plurality of mobile station 103 and mobile station 104. When there is a downlink packet to be sent from eNB to mobile station, each mobile station gets a downlink assignment, e.g., a set of radio resources in a physical downlink shared channel (PDSCH). When a UE needs to send a packet to eNB in the uplink, the mobile station gets a grant from the eNB that assigns a physical downlink uplink shared channel (PUSCH) consisting of a set of uplink radio resources. The mobile station gets the downlink or uplink scheduling information from a physical downlink control channel (PDCCH) or an enhanced physical downlink control channel (EPDCCH) that is targeted specifically to that mobile station. The downlink or uplink scheduling information and the other control information, carried by PDCCH, is referred to as downlink control information (DCI).
Figure 1 further shows exemplary block diagrams illustrating protocol stacks of UE 103, and eNB 101. UE 103 has a physical layer stack (PHY), Mac layer (MAC), Radio Link Control (RLC), Packet Data Control Protocol (PDCP) and Radio Resource Control (RRC). The peer protocol stacks terminated in eNB 101 on the network side, include PHY, MAC, RLC, PDCP and RRC. Figure 1 further shows exemplary block diagrams of UE 103 and eNB 101 that supports some embodiments of the present invention.
UE 103 has RF transceiver module 150, coupled with antenna 171 receives RF signals from antenna 171, converts them to baseband signals and sends them to processor 151. RF transceiver 150 also converts received baseband signals from the processor 151, converts them to RF signals, and sends out to antenna 171. Processor 151 processes the received baseband signals and invokes different functional modules to perform features in UE 103. Memory 152 stores program instructions and data to control the operations of UE 103. Figure 1 further illustrates seven functional modules 153 to 154, the MAC module could process the operation of MAC layer, and the lower layer module 154 process the operation of lower layer.
eNB 101 has RF transceiver module 160, coupled with antenna 172 receives RF signals from antenna 172, converts them to baseband signals and sends them to processor 161. RF transceiver 160 also converts received baseband signals from the processor 161, converts them to RF signals, and sends out to antenna 172. Processor 161 processes the received baseband signals and invokes different functional modules to perform features in eNB 101. Memory 162 stores program instructions and data to control the operations of eNB 101. Figure 1 further illustrates six functional modules 163 to 164 in eNB 101 that carry out embodiments of the current invention. The MAC module 163 could process the operation of MAC layer, and the lower layer module 164 could process the operation of lower layer. And the other modules are omitted here. The other modules corresponding to UE are omitted here.
In one embodiment, the communication system utilizes MAC layer to control the upper layers' access to the communication medium. MAC layer decides how much radio resource should be allocated to data from which logical channel of which mobile station. To achieve this, the MAC layer performs assistant information reporting such as buffer status reporting(BSR) and power headroom reporting(PHR) for network scheduling, multiplexing and de-multiplexing to combine and disassemble upper layer data unites into/out of lower layer data unites and HARQ to transfer data units over the radio interface. Exemplary of MAC layer includes the developing Long Term Evolution (LTE) of the 3GPP UMTS standard and IEEE 802.16 standard.
For coverage hole devices, PDCCH or EPDCCH may need repetitions across multiple subframes. In the meanwhile, the PDSCH and/or PUSCH of the devices may also need across sub frame (re)transmission (or repetitions). In order to determine the repetitions number (or the number of subframes occupied by data channel or control channel) for each physical channels in both DL and UL based on the channel situation, a method to report the channel status is necessary. The channel situation is evaluated by measuring the DL reference signals, through which RSRP, RSRQ, RSSI, CQI as well as other metrics used for channel quality evaluation can be derived. These measurement results can be reported directly as channel status. Or the measurement results within a certain range can be quantified into different coverage levels and each level is assigned a channel status index. The reported channel status index and the corresponding coverage levels are defined in the specification.
In one embodiment of the disclosure, a method for a mobile station to report the channel status includes: triggering a CSR when certain event occurs; obtaining the value of the channel status from the lower layer when there is at least one UL resource for new transmission; transmitting a CSR with one of the at least one UL resource; and canceling the triggered CSR. The events include but not limited to the following ones: 1) the mobile station is performing initial access or re-establishment to the network through random access procedure; 2) the channel status has changed since the last transmission of CSR; 3) the channel status has changed more than a threshold since the last transmission of CSR, wherein the threshold is configured by the network; 4) a request for CSR is received from the network; 5) the coverage problem is detected, e.g. the channel quality is worse than a predefined threshold. For example, the threshold could be set to different value according with different situation. When the mobile station uses a special PRACH resource or when it can't detect normal mode downlink physical channel (e.g, PBCH, PDCCH, PDSCH, and PHICH) for a period of time or when the channel quality is worse than a predefined threshold, it can determine that a coverage problem occurs.
In one embodiment, a method for a mobile station to transmitting a CSR further comprising: instructing the Multiplexing and Assembly procedure to generate the CSR MAC control element(CE) if the allocated UL resources can accommodate a CSR MAC CE plus its subheader. In the embodiments of present invention, the UL resources used for CSR transmission should be allocated by the network, which can be assigned semi-persistently through configuration or assigned dynamically through UL grants. One example of the MAC CE is that it has a fixed size of zero bits with two reserved bits in the subheader used to indicate four levels of channel status. Another example of the MAC CE is that it has a fixed size of one byte. Some bits are used as the fields of CSR, while others are reserved bits. A new LCID is assigned to the MAC CE for CSR.
In one embodiment of the present invention, when performing multiplexing and assembling to generate the CSR MAC CE, the mobile station takes into account the following relative priority in decreasing order: MAC CE for C-RNTI or data from UL-CCCH; MAC CE for BSR, with exception of BSR included for padding; MAC CE for CSR; other MAC CE and data from other logical channels except UL-CCCH. In other words, CRS MAC CE takes precedence over other MAC CE and data from other logical channels, but has lower priority than MAC CE for C-RNTI or data from UL-CCCH as well as MAC CE for BSR, with exception of BSR included for padding.
In one embodiment, a method for a mobile station to report the channel status includes: triggering a CSR upon initiating random access procedure, e.g. upon transmission of random access preamble; obtaining the value of the channel status from the physical layer when UL grant is received in the random access response; transmitting the a CSR with the allocated UL resources in the Message subsequent to random access response such as Msg3 and canceling the triggered CSR. In one embodiment, a method for a mobile station to transmit a CSR in Msg3 further comprising: instructing the Multiplexing and Assembly procedure to generate the CSR MAC CE; and placing the MAC CE at the beginning of the MAC PDU. The MAC CE has a fixed size of one byte with any subheader. In one embodiment, a method for a mobile station to placing the MAC CE at the beginning of a MAC PDU further comprising: checking whether the allocated UL resources can accommodate other higher priority MAC SDUs/MAC CE as well as the corresponding subheaders together with the CSR MAC CE; placing the CSR MAC CE at the beginning of the MAC PDU if the allocated UL resources can accommodate; otherwise waiting for another UL grant for CSR transmission.
After the communication between the mobile station and the network is established, i.e. the mobile station is in the RRC_CONNECTED state and performing data transfer to/from the network, the mobile station needs to monitor its channel situation and report the channel status timely upon detection that the channel status has changed or has changed more than a threshold since the last transmission of a CSR. The threshold can be configured by the network. If the channel status is reported during the initial random access through Msg3, the channel status is considered as the very first transmission.
In one embodiment, a method for a mobile station to report the channel status after initial random access further comprising: monitoring the channel situation; triggering a CSR when the channel status has changed or has changed more than a threshold since the last transmission of a CSR; obtaining the value of the channel status from the physical layer when there is at least one UL resource for new transmission; transmitting a CSR; and canceling the triggered CSR.
In one embodiment, a method for a mobile station to report the channel status after initial random access further comprising: monitoring the request for CSR sent from the network; triggering a CSR when the request is received; obtaining the value of the channel status from the physical layer when having UL resource for new transmission; transmitting a CSR; and canceling the triggered CSR.
It is possible that the there is no UL resource available to transmit the CSR. One example of the case is that only DL traffic is transferred from the network to the mobile station and there are no UL services. Another example of the case is that the channel status of the mobile station becomes worse and the UL grant still can't be received after several repetitions. In both of the cases, even a CSR is triggered, there won't be UL resource available to transmit the CSR. The triggered CSR remains pending until it is transmitted. In order to transmit the CSR timely upon the triggering, scheduling request will be required to be sent to the network if there is no UL resource available.
In one embodiment, a method for a mobile station to report the channel status further comprising: starting or re- starting a timer after a CSR is triggered; stopping the timer when the CSR is transmitted; triggering a scheduling request for UL radio resources when the timer expires; and sending a scheduling request to the network.
In one embodiment, a method for a mobile station to report the channel status further comprising: determining whether there is potential UL radio resource available for CSR after a CSR is triggered; starting or re-starting timer if there is no potential UL radio resource; stopping the timer when the CSR is transmitted; triggering a scheduling request for UL radio resources when the timer expires; and sending a scheduling request to the network. Determining whether there is potential UL radio resource available for CSR should consider the occurrence of the following conditions: whether there is pre-configured UL radio resources, such as dedicated UL resources configured for semi-persistent scheduling; and whether there is any pending SR. If there is a pre-configured UL radio resource or there is SR pending, the mobile station will transmit the channel status with the configured UL resources or the UL resources requested from the network. Otherwise, the mobile station considers that there is no potential UL radio resource available.
There are two types of scheduling request taking use of dedicated access channels such as physical UL control channel (PUCCH) or contention channels such as random access channel (RACH), i.e. dedicated-SR (D-SR) or RA-SR respectively. The mobile station utilizes RA-SR to request UL resources through random access procedure, while utilizes D-SR to request UL resources through the configured dedicated resources. When SR is triggered, the mobile station needs to determine which SR to utilize if both the RA-SR and D-SR are available.
In one embodiment, a method for a mobile station to send scheduling request comprising: utilizing RA-SR if there is no D-SR configured or the channel status becomes worse or it becomes worse than a pre-defined threshold; otherwise utilizing D-SR.
In one embodiment, the communication system utilizes NAS layer for mobility management and session management. NAS layer support the mobility of the mobile station and session management procedure to establish and maintain IP connectivity between the mobile station and the core network. Exemplary of NAS layer includes the developing Long Term Evolution (LTE) of the 3GPP UMTS standard.
In one embodiment of the disclosure, a method for a mobile station to report the channel status includes: sending a NAS message to the network when certain events occurs; obtaining the value of the channel status from the lower layer. The events include but not limited to the following ones: 1) the channel status has changed; 2) the channel status has changed more than a threshold; 3) the coverage problem is detected, e.g. the channel quality is worse than a predefined threshold.
In one embodiment, a method for a mobile station to sending a NAS message to the network further comprising: initiate the tracking area updating procedure, and sending the TRACKING AREA UPDATE REQUEST message containing the IE for channel status to the network.
Some further details are the above embodiments are given below. Referring now to Figure 2, Figure 2 illustrates a flowchart of an example for a mobile station to report the channel status in accordance with embodiments of the current invention. The mobile station monitors the occurrence of at least one triggering event in step 201. If the at least one triggering event occur 202, the mobile station triggers a CSR in step 203. If the mobile station has UL resource available for new transmission 204, it will obtain the channel status value from the lower layer in step 205. Then the mobile station transmits the CSR with the allocated UL resources in step 206 and cancels all the triggered CSR in step 207.
Referring now to Figure 3a, Figure 3a illustrates an example of the MAC CE for CSR for the present invention in accordance with embodiments of the current invention. In one embodiment of the disclosure, the MAC CE 303 has a fixed size of zero bits with two reserved bits e.g. 301 in the subheader used to indicate four levels of channel status. A new LCID 302 is assigned to the MAC CE for CSR. Or the MAC CE 313 has a fixed size of one byte. Five bits 312 are the fields of CSR, while others are reserved bits.
Referring now to Figure 3b, Figure 3b illustrated an example of the MAC CE for CSR transmitted through Msg 3 in accordance with embodiments of the current invention. In one embodiment of the disclosure, the MAC CE 321 has a fixed size of eight bits placed at the beginning of a MAC PDU, i.e. MAC header 322 and MAC payload 323.
Referring now to Figure 4, Figure 4 illustrates a flowchart of an example for a mobile station to transmit CSR in step 206. If the allocated UL resource(s) can accommodate the CSR MAC CE in step 401, the mobile station will instruct the multiplexing and assembly procedure to generate the MAC CE in step 402. Otherwise, it continues monitoring the UL grant and go to step 204.
Referring now to Figure 5, Figure 5 illustrates a flowchart for a mobile station to report channel status during initial random access in accordance with embodiments of the current invention. When the mobile station performs initial random access to the network in step 501, such as transmitting preamble, it triggers a CSR in step 502. If random access response is received in step 503, the mobile station will obtain the value of channel status in step 504, indicate to the Multiplexing and assembly entity to include a CSR MAC CE in Msg3 in step 505, obtain the MAC PDU to transmit from the "Multiplexing and assembly" entity and store it in the Msg3 buffer in step 506.
Referring now to Figure 6, Figure 6 illustrates a flowchart of an example for a mobile station to report channel status after RRC connection is established in accordance with embodiments of the current invention. The CSR transmitted in Msg3 is considered as the very first transmission. When in RRC_CONNECTED state, the mobile station monitors the channel status in step 601. If the channel status has changed more than a pre-defined threshold 602, a CSR is triggered in step 603. If there is UL resource available for new transmission 604, the mobile station will obtaining the CSR value from the physical layer and transmitting the CSR with the allocated resources, in step 605 and 606 respectively. Then all triggered CSR is cancelled in 607.
Referring now to Figure 7, Figure 7 illustrates a flowchart of an example for a mobile station to request UL resource for CSR through triggering and sending scheduling request in accordance with embodiments of the current invention. When the CSR triggering events occurs, the mobile station triggers a CSR in step 701. It starts or restarting a timer in step 702 and monitors UL grant continuously 703. If UL grant for new transmission is received in step 704, the mobile station transmits the CSR with the allocated resource in step 705 and stops the timer in step 706. Otherwise, the mobile station checks whether the timer expires or not. If the timer expires in step 707, it will trigger and send scheduling request to the network in step 708. Otherwise, it continues monitoring UL grants until the timer expires in step 703.
Referring now to Figure 8, Figure 8 illustrates a flowchart of another example for a mobile station to request UL resource for CSR through triggering and sending scheduling request in accordance with embodiments of the current invention. When the CSR triggering events occurs, the mobile station triggers a CSR in step 801. It determines whether there is at least one potential UL resource available in step 802, which considers two conditions, i.e. whether there is configured UL resource in step 820 and whether there is any pending scheduling request in step 821. If there is potential UL resource available in step 803, the mobile station would utilize the potential UL resource for CSR transmission in step 805. Otherwise, it starts or restarting a timer in step 804 and monitors UL grant continuously in step 806. If UL grant for new transmission is received in step 807, the mobile station transmits the CSR with the allocated resource in step 808 and stops the timer in step 809. Otherwise, the mobile station checks whether the timer expires or not in step 810. If the timer expires, it will trigger and send scheduling request to the network in step 811. Otherwise, it continues monitoring UL grants until the timer expires in step 806.
Referring now to Figure 9, Figure 9 illustrates a flowchart of an example for a mobile station to send scheduling request for CSR report in accordance with embodiments of the current invention. When the mobile station triggers a scheduling request for CSR report, it checks whether there is dedicated SR configured in step 901. If no dedicated SR is configured, it will utilize RA-SR in step 903. Otherwise, it checks further whether channel status becomes worse or worse than a predefined threshold in step 902. If the channel status becomes better or doesn't become worse than a threshold, it will utilize D-SR in step 904.
Referring now to Figure 10, Figure 10 illustrates a flowchart of an example for a mobile station to report channel status through NAS procedure in accordance with embodiments of the current invention. The mobile station monitors the occurrence of the triggering events in step 1001. If the triggering events occur in step 1002, the mobile station initiates tracking area update procedure in step 1003. Then it obtains the channel status value from the lower layer in step 1004 and transmits TRACKING AREA UPDATE REQUEST message to network containing the CSR.
While the present disclosure and the best modes thereof have been described in a manner establishing possession and enabling those of ordinary skill to make and use the same, it will be understood and appreciated that there are equivalents to the exemplary embodiments disclosed herein and that modifications and variations may be made thereto without departing from the scope and spirit of the inventions, which are to be limited not by the exemplary embodiments but by the appended claims.

Claims

1. A method for a mobile station to report the channel status by the MAC layer, comprising:
triggering a CSR when at least one triggering event occurs; and
transmitting the CSR to the network.
2. The method of claim 1, further comprising:
obtaining a value of the channel status from lower layer when there is at least one UL resource for new transmission;
transmitting the CSR with the at least one UL resource; and
canceling the triggered CSR.
3. The method of claim 1, wherein the at least one triggering event comprises at least one of the following terms:
the mobile station is performing initial access to the network or re-establishment through random access procedure;
the channel status has changed since the last transmission of a CSR;
the channel status has changed more than a threshold since the last transmission of a CSR, wherein the threshold is configured by the network;
a request for CSR is received from the network by the mobile station; and
a coverage problem is detected by the mobile station.
4. The method of claim 3, after triggering a CRS when the mobile station is performing initial access to the network or re-establishment through random access procedure further comprising:
obtaining the value of the channel status from the physical layer when an UL grant is received in the random access response;
transmitting the CSR in Msg3; and
canceling the triggered CSR.
5. The method of claim 1, further comprising:
after triggering a CSR starting or re- starting a timer.
6. The method of claim 1, further comprising:
determining whether there is at least one potential UL radio resource available;
starting or re-starting a timer if there is no potential UL radio resource.
7. The method of claim 6, wherein determining whether there is potential UL radio resource available further comprising:
checking whether there is pre-configured UL radio resources and whether there is any pending SR.
8. The method of claim 6, wherein after starting or re- starting a timer, a mobile station to report the channel status further comprising:
stopping the timer when the CSR is transmitted;
triggering a scheduling request for the at least one UL radio resource when the timer expires; and
sending a scheduling request to the network.
9. The method of claim 8, wherein a method for a mobile station to send a scheduling request comprising:
utilizing RA-SR if there is no D-SR configured or the channel status becomes worse or the channel status becomes worse than a pre-defined threshold;
otherwise, utilizing D-SR.
10. The method of claim 6, wherein the length of the timer is configured by the network.
11. The method of claim 5, wherein after starting or re- starting a timer, a mobile station to report the channel status further comprising:
stopping the timer when the CSR is transmitted;
triggering a scheduling request for the at least one UL radio resource when the timer expires; and
sending a scheduling request to the network.
12. The method of claim 11, wherein a method for a mobile station to send a scheduling request comprising:
utilizing RA-SR if there is no D-SR configured or the channel status becomes worse or the channel status becomes worse than a pre-defined threshold;
otherwise, utilizing D-SR.
13. The method of claim 5, wherein the length of the timer is configured by the network.
14. The method of claim 1, wherein transmitting a CSR with the at least one UL resource further comprising:
instructing the Multiplexing and Assembly procedure to generate the CSR MAC CE if the allocated UL resources can accommodate a CSR MAC CE plus its subheader.
15. The method of claim 14, wherein multiplexing and assembling to generate the CSR MAC CE further comprising: taking into account the following relative priority in decreasing order: MAC CE for C-RNTI or data from UL-CCCH; MAC CE for BSR, with exception of BSR included for padding; MAC CE for CSR; other MAC CE and data from other logical channels except UL-CCCH.
16. The method of claim 14, wherein instructing the multiplexing and assembly procedure to generate a CSR MAC CE, which is transmitted in Msg3 further comprising:
placing the CSR MAC CE at the beginning of the MAC PDU.
17. A method for a mobile station to report the channel status, the method comprising: sending a NAS message to the network when at least one events occurs; and
obtaining the value of the channel status from the lower layer.
18. The method of claim 17, wherein a mobile station sending a NAS message to the network further comprising:
initiating the tracking area updating procedure; and
sending the TRACKING AREA UPDATE REQUEST message containing the IE for channel status to the network.
19. The method of claim 17, wherein the at least one event comprises at least one of the following terms:
the channel status has changed;
the channel status has changed more than a threshold; and a coverage problem is detected.
PCT/CN2013/084497 2013-09-27 2013-09-27 Method to report the channel status Ceased WO2015042885A1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
PCT/CN2013/084497 WO2015042885A1 (en) 2013-09-27 2013-09-27 Method to report the channel status
PCT/CN2014/087559 WO2015043509A1 (en) 2013-09-27 2014-09-26 Method to report channel status
US14/784,321 US9924544B2 (en) 2013-09-27 2014-09-26 Method to report channel status
CN201480050474.5A CN105532060A (en) 2013-09-27 2014-09-26 Method to report channel status
EP14847919.9A EP3050377A4 (en) 2013-09-27 2014-09-26 Method to report channel status

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2013/084497 WO2015042885A1 (en) 2013-09-27 2013-09-27 Method to report the channel status

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US14/784,321 Continuation-In-Part US9924544B2 (en) 2013-09-27 2014-09-26 Method to report channel status

Publications (1)

Publication Number Publication Date
WO2015042885A1 true WO2015042885A1 (en) 2015-04-02

Family

ID=52741829

Family Applications (2)

Application Number Title Priority Date Filing Date
PCT/CN2013/084497 Ceased WO2015042885A1 (en) 2013-09-27 2013-09-27 Method to report the channel status
PCT/CN2014/087559 Ceased WO2015043509A1 (en) 2013-09-27 2014-09-26 Method to report channel status

Family Applications After (1)

Application Number Title Priority Date Filing Date
PCT/CN2014/087559 Ceased WO2015043509A1 (en) 2013-09-27 2014-09-26 Method to report channel status

Country Status (3)

Country Link
US (1) US9924544B2 (en)
EP (1) EP3050377A4 (en)
WO (2) WO2015042885A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018515993A (en) * 2015-05-11 2018-06-14 クゥアルコム・インコーポレイテッドＱｕａｌｃｏｍｍ Ｉｎｃｏｒｐｏｒａｔｅｄ Resource allocation and message identification for control signals in cellular systems

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6426279B2 (en) 2014-09-26 2018-11-21 京セラ株式会社 Coordinated distributed scheduling for inter-device (D2D) communication
US10397938B2 (en) * 2015-06-26 2019-08-27 Lg Electronics Inc. Method for transmission and reception of uplink data in wireless communication system, and device therefor
US10334519B2 (en) * 2016-04-22 2019-06-25 Qualcomm Incorporated Chirp signal formats and techniques
CN111148263B (en) * 2017-05-05 2021-04-09 华为技术有限公司 Method and device for transmitting data
CN109391408B (en) * 2017-08-10 2021-08-06 普天信息技术有限公司 A scheduling request indication transmission method in an orthogonal frequency division multiplexing system
WO2020019138A1 (en) * 2018-07-23 2020-01-30 Qualcomm Incorporated RESOURCES AND SCHEMES FOR GRANT-FREE UPLINK TRANSMISSION IN eMTC/NB-IoT
WO2020028865A1 (en) * 2018-08-02 2020-02-06 Intel Corporation Channel quality measurement reporting
CN116437484A (en) * 2018-10-10 2023-07-14 华为技术有限公司 A communication method and device
WO2020092359A1 (en) * 2018-10-31 2020-05-07 Intel Corporation Scheduling request enhancements for 5g networks
CN117354904A (en) * 2020-01-10 2024-01-05 华为技术有限公司 Communication methods and devices
CN111343727B (en) * 2020-03-03 2022-07-08 西南医科大学附属中医医院 Diagnosis and treatment classification information transmission method and system for otolaryngological department

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102123486A (en) * 2010-01-11 2011-07-13 电信科学技术研究院 Method, system and equipment for data sending and terminal operation
CN102215591A (en) * 2010-04-06 2011-10-12 华为技术有限公司 A transmission method of channel state information, user equipment and base station
CN102624494A (en) * 2011-01-27 2012-08-01 中兴通讯股份有限公司 Channel status indicator measuring method and system
US20130163532A1 (en) * 2011-12-23 2013-06-27 Research In Motion Limited Method Implemented in an eNodeB Base Station

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101448622B1 (en) * 2007-09-21 2014-10-08 엘지전자 주식회사 A channel information transmission method by a terminal and a mobile communication terminal
US8085683B2 (en) * 2008-04-02 2011-12-27 National University Of Ireland Maynooth Method and apparatus for estimating link quality
JP5345618B2 (en) * 2008-06-25 2013-11-20 パナソニック株式会社 Radio base station apparatus, radio relay station apparatus, and radio terminal apparatus
US8433894B2 (en) * 2008-07-08 2013-04-30 Interdigital Patent Holdings, Inc. Support of physical layer security in wireless local area networks
KR101523590B1 (en) * 2009-01-09 2015-05-29 한국전자통신연구원 Codec mode control method and terminal of integrated Internet protocol network
CN102342145A (en) 2009-03-20 2012-02-01 瑞典爱立信有限公司 Method and Apparatus for Monitoring a Random Access Channel
KR101789328B1 (en) * 2010-01-13 2017-11-21 엘지전자 주식회사 Method and Apparatus for indicating occurrence of event in wireless comunication system
CA2795258C (en) * 2010-04-02 2016-10-18 Interdigital Patent Holdings, Inc. Low mobility states and procedures
CN102469519A (en) 2010-11-05 2012-05-23 大唐移动通信设备有限公司 Method and device for controlling waiting time
US20130272255A1 (en) * 2011-04-01 2013-10-17 Jing Zhu Handling Measurements and Reporting for Fixed Devices in Mobile Broadband Networks
JP5634639B2 (en) * 2011-04-20 2014-12-03 エルジー エレクトロニクス インコーポレイティド MIMO feedback information transmission / reception method, terminal and base station in broadband wireless communication system
CN102409519B (en) * 2011-10-10 2012-12-12 李嘉斌 Windproof safety clothes pole and clothes rack
EP2635082A1 (en) * 2012-02-29 2013-09-04 Panasonic Corporation Dynamic subframe bundling
US9661441B2 (en) * 2013-04-17 2017-05-23 Telefonaktiebolaget Lm Ericsson (Publ) System and method to reduce radio resource management (RRM) related signaling in machine-to-machine (M2M) communications
JP6352280B2 (en) * 2013-09-26 2018-07-04 京セラ株式会社 Network device and user terminal

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102123486A (en) * 2010-01-11 2011-07-13 电信科学技术研究院 Method, system and equipment for data sending and terminal operation
CN102215591A (en) * 2010-04-06 2011-10-12 华为技术有限公司 A transmission method of channel state information, user equipment and base station
CN102624494A (en) * 2011-01-27 2012-08-01 中兴通讯股份有限公司 Channel status indicator measuring method and system
US20130163532A1 (en) * 2011-12-23 2013-06-27 Research In Motion Limited Method Implemented in an eNodeB Base Station

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018515993A (en) * 2015-05-11 2018-06-14 クゥアルコム・インコーポレイテッドＱｕａｌｃｏｍｍ Ｉｎｃｏｒｐｏｒａｔｅｄ Resource allocation and message identification for control signals in cellular systems

Also Published As

Publication number Publication date
EP3050377A1 (en) 2016-08-03
US20160057785A1 (en) 2016-02-25
US9924544B2 (en) 2018-03-20
EP3050377A4 (en) 2017-06-14
WO2015043509A1 (en) 2015-04-02

Similar Documents

Publication Publication Date Title
JP7685648B2 (en) BEAM FAILURE DETERMINATION METHOD, APPARATUS, DEVICE AND STORAGE MEDIUM
EP4018772B1 (en) Radio link failure recovery
US9924544B2 (en) Method to report channel status
US20210227566A1 (en) Method and apparatus of preventing bandwidth part misalignment in a wireless communication system
JP6348712B2 (en) Wireless communication terminal, wireless communication device, wireless communication system, and uplink resource request processing method
US11689271B2 (en) Methods and devices for beam failure recovery
US12232112B2 (en) Transceiver device and scheduling device
US20190124715A1 (en) Method and apparatus of performing msg3-based system information request in a wireless communication system
CN113632580B (en) COT sharing indicator in message 3 of random access procedure
TW202527586A (en) Method for reporting channel failure
CN114080761A (en) Method and apparatus for handling concurrent occurrence of scheduling request (SR) cancellation, random access (RA) prioritization and beam failure recovery (BFR) with respect to primary cell (PCell) and secondary cell (SCell)
US11102808B2 (en) User terminal and radio communication method
US12302408B2 (en) UE, network node and methods for handling 2-step and 4-step random access procedures
TW202021404A (en) User equipment, network node and methods therein for handling a two-step random access procedure in a wireless communications network
TW202220492A (en) Configured grant transmissions in controlled environments
US12101825B2 (en) User equipment involved in performing a random access procedure
US20220346127A1 (en) User equipment and scheduling node
US11490422B2 (en) Methods, terminal device and base station for channel sensing in unlicensed spectrum
US12232042B2 (en) User equipment and scheduling node
US20240430040A1 (en) Terminal Devices, Network Devices, and Methods Thereof
WO2020061961A1 (en) Channel quality measurement method and apparatus
US20230361949A1 (en) Method and device used in communication node used for wireless communication
CN105532060A (en) Method to report channel status
US20220232480A1 (en) Transmit Power Allocation Technique
CN114026940A (en) Method, terminal device and network node for uplink transmission

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 13894106

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 13894106

Country of ref document: EP

Kind code of ref document: A1