WO2022236657A1 - Procédé et appareil pour déterminer une position de période de garde pour une commutation d'antenne srs - Google Patents

Procédé et appareil pour déterminer une position de période de garde pour une commutation d'antenne srs Download PDF

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Publication number
WO2022236657A1
WO2022236657A1 PCT/CN2021/092973 CN2021092973W WO2022236657A1 WO 2022236657 A1 WO2022236657 A1 WO 2022236657A1 CN 2021092973 W CN2021092973 W CN 2021092973W WO 2022236657 A1 WO2022236657 A1 WO 2022236657A1
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WIPO (PCT)
Prior art keywords
srs
guard period
resource set
predetermined rule
domain position
Prior art date
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PCT/CN2021/092973
Other languages
English (en)
Inventor
Hiromasa Umeda
Lei Du
Juha Pekka Karjalainen
Kyoungmin Park
Original Assignee
Nokia Shanghai Bell Co., Ltd.
Nokia Solutions And Networks Oy
Nokia Technologies Oy
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.)
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Publication date
Application filed by Nokia Shanghai Bell Co., Ltd., Nokia Solutions And Networks Oy, Nokia Technologies Oy filed Critical Nokia Shanghai Bell Co., Ltd.
Priority to EP21941233.5A priority Critical patent/EP4338515A1/fr
Priority to CN202180098105.3A priority patent/CN117413590A/zh
Priority to PCT/CN2021/092973 priority patent/WO2022236657A1/fr
Publication of WO2022236657A1 publication Critical patent/WO2022236657A1/fr

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    • 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
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H04L5/0051—Allocation of pilot signals, i.e. of signals known to the receiver of dedicated pilots, i.e. pilots destined for a single user or terminal
    • 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
    • H04B7/0602—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 antenna switching
    • H04B7/0604—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 antenna switching with predefined switching scheme
    • 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
    • H04L5/0091—Signaling for the administration of the divided path
    • H04L5/0094—Indication of how sub-channels of the path are allocated
    • 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
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0014—Three-dimensional division
    • H04L5/0023—Time-frequency-space

Definitions

  • Various example embodiments described herein generally relate to communication technologies, and more particularly, to methods and apparatuses for determining a location of a guard period for sounding reference signal (SRS) antenna port switching.
  • SRS sounding reference signal
  • a sounding reference signal may be used to estimate uplink (UL) channel quality over a bandwidth or bandwidth part (BWP) .
  • BWP bandwidth or bandwidth part
  • the SRS may also be used to estimate downlink (DL) channel quality.
  • the terminal device may comprise at least one processor and at least one memory including computer program code stored thereon.
  • the at least one memory and the computer program code may be configured to, with the at least one processor, cause the terminal device to perform operations including receiving a Sounding Reference Signal (SRS) resource set configuration.
  • the SRS resource set configuration may include at least one SRS resource set configured for SRS antenna switching between different antenna ports.
  • the operations may further include determining a time-domain position of a guard period where the SRS antenna switching occurs based on indication of a predetermined rule.
  • the network device may comprise at least one processor and at least one memory including computer program code stored thereon.
  • the at least one memory and the computer program code may be configured to, with the at least one processor, cause the network device to perform operations including configuring a Sounding Reference Signal (SRS) resource set configuration.
  • the SRS resource set configuration may include at least one SRS resource set configured for SRS antenna switching between different antenna ports.
  • the operations may further comprise determining a time-domain position of a guard period where the SRS antenna switching occurs based on a predetermined rule.
  • an example embodiment of a method implemented at a terminal device may comprise receiving a Sounding Reference Signal (SRS) resource set configuration.
  • the SRS resource set configuration may include at least one SRS resource set configured for SRS antenna switching between different antenna ports.
  • the method may further comprise determining a time-domain position of a guard period where the SRS antenna switching occurs based on indication of a predetermined rule.
  • SRS Sounding Reference Signal
  • an example embodiment of a method implemented at a network device may comprise configuring a Sounding Reference Signal (SRS) resource set configuration.
  • the SRS resource set configuration may include at least one SRS resource set configured for SRS antenna switching between different antenna ports.
  • the method may further comprise determining a time-domain position of a guard period where the SRS antenna switching occurs based on a predetermined rule.
  • SRS Sounding Reference Signal
  • an example embodiment of an apparatus may comprise means for receiving a Sounding Reference Signal (SRS) resource set configuration.
  • the SRS resource set configuration may include at least one SRS resource set configured for SRS antenna switching between different antenna ports.
  • the apparatus may further comprise means for determining a time-domain position of a guard period where the SRS antenna switching occurs based on indication of a predetermined rule.
  • SRS Sounding Reference Signal
  • an example embodiment of an apparatus may comprise means for configuring a Sounding Reference Signal (SRS) resource set configuration.
  • the SRS resource set configuration may include at least one SRS resource set configured for SRS antenna switching between different antenna ports.
  • the apparatus may further comprise means for determining a time-domain position of a guard period where the SRS antenna switching occurs based on a predetermined rule.
  • SRS Sounding Reference Signal
  • an example embodiment of a computer program may comprise instructions stored on a computer readable medium.
  • the instructions when executed by at least one processor of a terminal device, may cause the terminal device to perform operations comprising receiving a Sounding Reference Signal (SRS) resource set configuration.
  • the SRS resource set configuration may include at least one SRS resource set configured for SRS antenna switching between different antenna ports.
  • the operations may further comprise determining a time-domain position of a guard period where the SRS antenna switching occurs based on indication of a predetermined rule.
  • an example embodiment of a computer program may comprise instructions stored on a computer readable medium.
  • the instructions when executed by at least one processor of a network device, may cause the network device to perform operations comprising configuring a Sounding Reference Signal (SRS) resource set configuration.
  • the SRS resource set configuration may include at least one SRS resource set configured for SRS antenna switching.
  • the operations may further comprise determining a time-domain position of a guard period where the SRS antenna switching occurs based on a predetermined rule.
  • Fig. 1 is a schematic diagram illustrating an example communication network.
  • Fig. 2 is a schematic diagram illustrating an example antenna port switching for sounding reference signal (SRS) transmissions.
  • SRS sounding reference signal
  • Fig. 3 is a schematic diagram illustrating an example SRS resource set configuration.
  • Fig. 4 is a signaling diagram illustrating example operations for determining a position of a guard period for SRS antenna switching according to an example embodiment.
  • Fig. 5A is a schematic diagram illustrating an example rule to determine a position of a guard period for SRS antenna switching according to an example embodiment.
  • Fig. 5B is a schematic diagram illustrating an example rule to determine a position of a guard period for SRS antenna switching according to an example embodiment.
  • Fig. 6 is a schematic diagram illustrating an example rule to determine a position of a guard period for SRS antenna switching according to an example embodiment.
  • Fig. 7A is a schematic diagram illustrating an example rule to determine a position of a guard period for SRS antenna switching according to an example embodiment.
  • Fig. 7B is a schematic diagram illustrating an example rule to determine a position of a guard period for SRS antenna switching according to an example embodiment.
  • Fig. 8 is a signaling diagram illustrating example operations for determining a position of a guard period for SRS antenna switching according to an example embodiment.
  • Fig. 9 is a signaling diagram illustrating example operations for determining a position of a guard period for SRS antenna switching according to an example embodiment.
  • Fig. 10 is a signaling diagram illustrating example operations for determining a position of a guard period for SRS antenna switching according to an example embodiment.
  • Fig. 11 is a functional block diagram illustrating an apparatus implemented at a user equipment device according to an example embodiment.
  • Fig. 12 is a functional block diagram illustrating an apparatus implemented at a network device according to an example embodiment.
  • Fig. 13 illustrates a structural block diagram of a communication system according to an example embodiment.
  • the term "network device” refers to any suitable entities or devices that can provide cells or coverage, through which the terminal device can access the network or receive services.
  • the network device may be commonly referred to as a base station.
  • the term "base station” used herein can represent a node B (NodeB or NB) , an evolved node B (eNodeB or eNB) , or a gNB.
  • the base station may be embodied as a macro base station, a relay node, or a low power node such as a pico base station or a femto base station.
  • the base station may consist of several distributed network units, such as a central unit (CU) , one or more distributed units (DUs) , one or more remote radio heads (RRHs) or remote radio units (RRUs) .
  • CU central unit
  • DUs distributed units
  • RRHs remote radio heads
  • RRUs remote radio units
  • terminal device refers to any entities or devices that can wirelessly communicate with the network devices or with each other.
  • the terminal device can include a mobile phone, a mobile terminal (MT) , a mobile station (MS) , a subscriber station (SS) , a portable subscriber station (PSS) , an access terminal (AT) , a computer, a wearable device, an on-vehicle communication device, a machine type communication (MTC) device, a D2D communication device, a V2X communication device, a sensor and the like.
  • the term “terminal device” can be used interchangeably with a UE, a user terminal, a mobile terminal, a mobile station, or a wireless device.
  • Fig. 1 illustrates a schematic diagram of an example communication network 100, such as a 5G NR network, in which aspects of the present disclosure may be performed.
  • the communication network 100 which may be a part of a larger network, may include a base station 120 shown as gNB and a user equipment (UE) device 110 which communicates with the gNB 120 on uplink (UL) and downlink (DL) channels.
  • the gNB 120 may include a number of antenna elements and support multiple-input multiple-output (MIMO) technologies including for example spatial multiplexing, beam-forming and/or transmit diversity.
  • MIMO multiple-input multiple-output
  • the UE 110 may have multiple antenna ports which correspond to different communication channels, and channel quality for one antenna port may be different from channel quality for another antenna port.
  • the UE 110 may be configured to transmit sounding reference signals (SRSs) on SRS resources to the gNB 120, and the number of the SRSs and/or the SRS resources may be determined based on the number of antenna ports.
  • the gNB 120 may measure the channel quality based on the received SRSs.
  • Fig. 2 is a schematic diagram illustrating example uplink SRS transmissions on multiple antenna ports.
  • the UE 110 may have four antenna ports 232, 234, 236, 238, which are connected to Tx/Rx switches 222, 224, 226, 228, respectively. It is assumed that the UE 110 supports antenna switching capability "t2r4" for a TDD carrier component (CC) or band, where "t2" means that the UE 110 can use up to two transmit (Tx) chains, and "r4" means that the UE 110 can use up to four receive (Rx) chains.
  • the antenna ports 232, 234 may be configured to transmit and receive signals, while the antenna ports 236, 238 may be configured to receive signals only except for SRS transmissions.
  • the UE 110 since the number of Tx chains is less than the number of Rx antennas, the UE 110 needs to switch the Tx chains from the antenna ports 232, 234 to the antenna ports 236, 238 so as to sound spatial channels from all the Rx antennas, as shown in Fig. 2.
  • a guard period of Y symbols may be needed for the SRS antenna switching, in which the UE 110 does not transmit any other signals.
  • Table 1 shows the minimum guard period requirements. Referring to Table 1, when a subcarrier spacing (SCS) ⁇ f is less than 120 kHz, the minimum guard period is one OFDM symbol, and when the subcarrier spacing ⁇ f is 120 kHz, the minimum guard period is two OFDM symbols. It means that the UE 110 should have an ability to complete the SRS antenna switching within one or two OFDM symbols.
  • SCS subcarrier spacing
  • an SRS resource set configured for the UE 110 may include SRS resource 1 provided in symbol 8 of a slot and SRS resource 2 provided in symbol 13 of the slot.
  • the SRS resources 1, 2 may be mapped to different antenna ports and they can be called SRS resource pair.
  • a guard period is needed between the SRS resources 1 and 2 to perform antenna switching.
  • CA carrier aggregation
  • MR-DC multi-RAT dual connectivity
  • SRS resource refers to a time period such as an OFDM symbol (s) where the SRS is transmitted
  • guard period refers to a time period such as an OFDM symbol (s) where the SRS antenna switching occurs, and during the guard period the UE does not transmit any other signals.
  • the gNB can schedule UL transmission or DL reception for the UE in symbols positioned in-between SRS resources but not occupied by the guard period. Therefore, the waste of symbol resources would be avoided or minimized and the resource utilization efficiency of the serving bands would be improved.
  • Fig. 4 is a signaling diagram illustrating example operations for determining a position of a guard period for SRS antenna switching according to an example embodiment.
  • the operations shown in Fig. 4 may be performed by the UE 110 and the gNB 120 shown in Fig. 1.
  • the UE 110 may receive an SRS resource set configuration from the gNB 120.
  • the SRS resource set configuration may include one or more SRS resource sets as configured by for example a higher layer parameter SRS-ResourceSet, and one of the one or more SRS resource set may include one or more SRS resources as configured by for example a higher layer parameter SRS-Resource.
  • a SRS resource may occupy one or more (e.g. 1, 2, or 4) consecutive OFDM symbols e.g. within the last 6 symbols of a slot. In some embodiments, the SRS resource may also occupy any other symbols within a slot.
  • at least one SRS resource set may be configured for SRS antenna switching as discussed above with reference to Fig.
  • the SRS resource set is configured for the antenna switching.
  • the SRS resource set for antenna switching may include two or more SRS resources for SRS transmissions on different antenna ports, and antenna switching is needed between two SRS resources that are associated with different antenna ports.
  • the UE 110 may determine a time-domain position of a guard period for the SRS antenna switching based on a predetermined rule.
  • the predetermined rule refers to a rule or standard to determine the time-domain position of the guard period relative to the position of the SRS resources in the SRS resource set. Some examples of the predetermined rule will be discussed in detail later.
  • the rule may be pre-configured at the UE 110 for example by UE vendors considering UE capability.
  • the UE 110 can determine an exact timing such as one or two consecutive OFDM symbols to perform the SRS antenna switching.
  • the UE 110 may send the predetermined rule to the gNB 120 so that the gNB 120 can also be aware of the guard period position.
  • the predetermined rule may be sent before the operation 310 of receiving the SRS resource set configuration from the gNB 120.
  • the UE 110 may send the predetermine rule while reporting UE capability to the gNB 120.
  • the UE 110 may actively send the capability report including the predetermined rule to the gNB 120 e.g. during initial attachment to the network or in a tracking area updating procedure, or send the capability report including the predetermined rule in response to a capability enquiry received from the gNB 120.
  • the UE 110 may send the predetermined rule to the gNB 120 after the operation 310 of receiving the SRS resource set configuration.
  • the gNB 120 may determine the time-domain position of the guard period for the SRS antenna switching based on the received predetermined rule.
  • the gNB 120 knows the exact position of the guard period where the SRS antenna switching occurs, the gNB 120 can schedule UL and/or DL signal transmissions on symbols other than the guard period, for example on symbols in-between the SRS resources in a SRS resource set for antenna switching but not occupied or overlapped by the guard period. Therefore, the resource utilization efficiency of the serving bands would be improved.
  • the SRS resource set configured for the UE 110 may include SRS resources 1 and 2 for SRS transmissions on different antenna ports, and the SRS resources 1 and 2 may be configured in the same slot or in different slots.
  • the SRS resource 1 is positioned in a slot n and the SRS resource 2 is positioned in a slot n+1.
  • both the SRS resources 1, 2 are positioned in a slot n.
  • the UE 110 may determine a position of the guard period for SRS antenna switching according to the predetermined rule in the operation 320. For example, the UE 110 may position the guard period, which may be one or two OFDM symbols depending on the subcarrier spacing (SCS) ⁇ f as shown in the above Table 1, right before or right after the respective SRS resources 1 and 2.
  • the UE 110 may use one bit to indicate the position of the guard period. For example, as shown in Figs. 5A and 5B, Bit “0" indicates that the guard period is positioned right before the SRS resource, and Bit "1" indicates that the guard period is positioned right after the SRS resource.
  • the UE 110 may position the guard period before and after the SRS resource. Then two bits may be used to indicate the guard period position. For example, Bits “10” indicate that the guard period is positioned before the SRS resource, Bits “01” indicate that the guard period is positioned after the SRS resource, and Bits "11” indicate that the guard period is positioned before and after the SRS resource.
  • the UE 110 may inform the gNB 120 of the predetermined rule by sending the bit (s) . Then the gNB 120 may determine the guard period position based on the received bit (s) in the operation 340.
  • an SRS resource set configured for the UE 110 may include SRS resources 1 and 2 (i.e., SRS 1 and SRS 2) for SRS transmissions on different antenna ports, and the SRS resources 1 and 2 are configured within the same slot n.
  • the SRS resources may be configured in the last 6 symbols in a slot, and the maximum interval between the SRS resources 1 and 2 in the set may include 4 symbols. Any one or two consecutive symbols of the 4 interval symbols, depending on the subcarrier spacing ⁇ f as shown in the above Table 1, may be used as the guard period.
  • the interval between the SRS resources 1 and 2 in the set may also include 3 symbols, 2 symbols or 1 symbol dependent on the SRS resource configuration.
  • a bitmask or bitmap may be used to identify one or two symbols in the interval that are used as the guard period, and the bitmask may have a length (in unit of bit) equal to the interval (in unit of symbol) . For example, when the interval between the SRS resources 1, 2 includes 4 symbols, a bitmask "1100" indicates that the first two symbols are used as the guard period, or a bitmask "0010" indicates that the third symbol is used as the guard period.
  • bitmask "10" indicates that the first symbol is used as the guard period
  • a bitmask "01” indicates that the second symbol is used as the guard period. It would be appreciated that when the interval includes 2 symbols and the subcarrier spacing ⁇ f is 120 kHz, or when the interval includes 1 symbol, no bitmask is needed because all the interval symbols would be used as the guard period.
  • Table 2 shows an example of bitmasks representing the rule to determine the guard period position.
  • the SRS resource may be applied at any position in a slot, and the maximum interval between the SRS resources 1, 2 in a SRS resource set would be up to 12 symbols. Therefore, the bitmask may have a maximum length of 12 bits. In some embodiments, the bitmask may have an extended length to further cover e.g. one or two symbols before the SRS resource 1 and/or one or two symbols after the SRS resource 2.
  • Table 2 bitmask per interval and subcarrier spacing
  • the UE 110 may inform the gNB 120 of the predetermined rule by sending the bitmasks shown in Table 2 to the gNB 120.
  • the bitmasks may be sent before or after the operation 310 of receiving the SRS resource set configuration from the gNB 120.
  • the gNB 120 may determine the position of the guard period by selecting a proper bitmask in the operation 340. For example, if the scheduled SRS resources 1, 2 in a set have an interval of 3 symbols and the subcarrier spacing ⁇ f is 60 kHz, the gNB 120 would use the bitmask g 1 g 2 g 3 to determine the position of the guard period.
  • the SRS resource set configured for the UE 110 may include SRS resources 1 and 2 (e.g., SRS 1 and SRS 2) for SRS transmissions on different antenna ports, and the SRS resources 1 and 2 may be configured in different slots (Fig. 7A) or in the same slot (Fig. 7B) .
  • an offset parameter GP_offset may be used to indicate an offset of the guard period relative to a corresponding SRS resource.
  • the offset parameter GP_offset may indicate that the guard period starts from the (GP_offset+1) symbol after the corresponding SRS resource. For example, if GP_offset is 0, the one or two consecutive symbols right after the SRS resource are used as the guard period. If GP_offset is 2, the guard period starts at the third symbol after the corresponding SRS resource.
  • the offset parameter may be used together with the position bit (s) to indicate if the guard period is positioned before and/or after the corresponding SRS resource as shown in Figs. 5A and 5B.
  • the guard period is positioned before the SRS resource and there is one symbol between the guard period and the SRS resource. If the offset parameter is 1 and the position bit is 1, the guard period is positioned after each of the SRS resource 1 and 2 and there is one symbol between the guard period and each of the SRS resources 1 and 2.
  • Fig. 7B shows an example where the SRS resources 1, 2 in the SRS resource set are configured in the same slot.
  • the guard period may be positioned between the SRS resources 1 and 2, and the offset parameter GP_offset may indicate an offset of the guard period from the first SRS resource (i.e., SRS resource 1) .
  • the offset parameter GP_offset is 2
  • the guard period starts from the third symbol after the SRS resource 1.
  • the offset parameter GP_offset is 0, the guard period is positioned right after the SRS resource 1.
  • Table 3 shows an example of the offset parameter to indicate the positon of the guard period.
  • the parameters are provided per interval and subcarrier spacing, and it would be appreciated that in some embodiments, the offset parameter may be identical for the subcarrier spacing less than 120 kHz.
  • Table 3 The offset parameter per interval and subcarrier spacing
  • the UE 110 may inform the gNB 120 of the predetermined rule by sending the offset parameter (s) .
  • the offset parameter (s) may be sent before or after the operation 310 of receiving the SRS resource set configuration from the gNB 120. Then the gNB 120 may determine the position of the guard period based on the received offset parameter (s) in the operation 340.
  • Fig. 8 is a signaling diagram illustrating example operations for determining a position of a guard period for SRS antenna switching according to an example embodiment.
  • the operations shown in Fig. 8 may be performed for example by the UE 110 and the gNB 120 shown in Fig. 1. It would be appreciated that some operations in Fig. 8 may be similar to those shown in Fig. 4, and the below description will focus on operations different from those in Fig. 4.
  • the UE 110 may receive a rule for determining a position of a guard period for SRS antenna switching from the gNB 120.
  • the gNB 120 may be pre-configured with the rule to determine the guard period position and it sends the rule to the UE 110 when the UE 110 initially connects to the gNB 120.
  • the gNB 120 may send the rule in a radio resource control (RRC) configuration or re-configuration message.
  • RRC radio resource control
  • the gNB 120 may send the rule to the UE 110 when it receives a UE capability report indicating that the UE supports SRS antenna switching.
  • the gNB 120 may send the rule to the UE 110 when the gNB 120 configures the SRS resources for the UE 110.
  • the rule may be included in the SRS resource set configuration sent from the gNB 120 to the UE 110.
  • the UE 110 may receive an SRS resource set configuration from the gNB 120.
  • the operation 420 may substantially similar to the operation 310 in Fig. 4, except that in some embodiments, the SRS resource set configuration sent in the operation 420 may further include the rule for determining the guard period position as mentioned above with reference to the operation 410.
  • the gNB 120 may determine the position such as one or two OFDM symbols of the guard period for SRS antenna switching based on the rule.
  • the gNB 120 would not schedule UL and/or DL signal transmissions for the UE 110 during the guard period. Instead, the gNB 120 may schedule UL and/or DL signal transmissions on symbols other than the guard period.
  • the UE 110 may also determine the position of the guard period based on the rule. Then the UE 110 would perform the SRS antenna switching during the determined guard period and perform signal transmission/reception on other symbols. Therefore, the resource utilization efficiency of the serving bands would be improved.
  • the rule for determining the guard period position may be pre-configured at the UE 110 and it is sent from the UE 110 to the gNB 120.
  • the rule for determining the guard period position may be pre-configured at the gNB 120 and it is sent from the gNB 120 to the UE 110. It would be appreciated that in some embodiments, the rule for determining the guard period position may be pre-configured at both the UE 110 and the gNB 120, and the UE 110 does not need to send/receive the rule to/from the gNB 120. It may further reduce the signaling overhead of the network. It is appreciated that the rule used in Fig. 8 can be referred to in the previous embodiments.
  • Fig. 9 is a signaling diagram illustrating example operations for determining a position of a guard period for SRS antenna switching according to an example embodiment.
  • the operations shown in Fig. 9 may be performed for example by the UE 110 and the gNB 120 shown in Fig. 1. It would be appreciated that some operations in Fig. 9 may be similar to those shown in Figs. 4 and 8, and the below description will focus on operations different from those in Figs. 4 and 8.
  • the UE 110 may receive an SRS resource set configuration from the gNB 120.
  • the SRS resource set configuration includes at least one SRS resource set configured for SRS antenna switching.
  • the UE 110 and the gNB 120 may determine a position of a guard period for the SRS antenna switching according to a predetermined rule, respectively.
  • the rule may be pre-configured at the UE 110 and have been sent from the UE 110 to the gNB 120.
  • the rule may be pre-configured at the gNB 120 and have been sent from the gNB 120 to the UE 110.
  • the rule may be pre-configured at both the UE 110 and the gNB 120 and rule transmission is not needed therebetween.
  • the UE 110 may determine if the guard period position determined at the operation 520 is available. For example, referring to Fig. 3, the symbol 9 may be determined as the guard period according to the rule at the operation 520, but the symbol 9 may be unavailable for the guard period due to some reasons such as implementation constraints.
  • the UE 110 may use the guard period to perform antenna switching for the SRS transmissions.
  • the UE 110 may determine a new actual time-domain position for the guard period. For example, referring to Fig. 3, if the symbol 9 determined according to the predetermined rule at the operation 520 is unavailable, the UE 110 may instead select any one of the symbols 10-12 as the guard period for antenna switching if the symbols 10-12 are available. At this point of time, the actual guard period determined at the UE 110 is different from the guard period determined at the gNB 120.
  • the UE 110 may inform the gNB 120 of the actual guard period determined at the UE 110 so that the gNB 120 and the UE 110 can reach an agreement on the position of the guard period.
  • the UE 110 would perform the SRS antenna switching during the actual guard period, and the gNB 120 would not schedule DL and/or UL signal transmissions for the UE 110 during the actual guard period.
  • Fig. 10 is a signaling diagram illustrating example operations for determining a position of a guard period for SRS antenna switching according to an example embodiment.
  • the operations shown in Fig. 10 may be performed for example by the UE 110 and the gNB 120 shown in Fig. 1. It would be appreciated that some operations in Fig. 10 may be the same or similar to those shown in Fig. 9, and the below description will focus on differences between the embodiment shown in Fig. 10 and the embodiment shown in Fig. 9.
  • the UE 110 may receive from the gNB 120 an SRS resource set configuration including at least one SRS resource set for SRS antenna switching, and at 520, the UE 110 and the gNB 120 may determine a position of a guard period for the SRS antenna switching according to a predetermined rule, respectively.
  • the rule may be pre-configured at the UE 110 and have been sent from the UE 110 to the gNB 120, be pre-configured at the gNB 120 and have been sent from the gNB 120 to the UE 110, or be pre-configured at both the UE 110 and the gNB 120.
  • the gNB 120 may determine if the guard period position determined at the operation 520 is available. For example, referring to Fig. 3, the symbol 9 may be determined as the guard period according to the rule at the operation 520, but the symbol 9 may be unavailable for the guard period because the gNB 120 has allocated the symbol 9 for other bands for the UE 110 and/or for other UEs with higher priority.
  • the gNB 120 may consider that the UE 110 would perform antenna switching during the guard period and thus the gNB 120 would not schedule signal transmission for the UE 110 during the guard period.
  • the gNB 120 may determine a new actual time-domain position for the guard period. For example, the gNB 120 may consider resource allocations for other bands for the UE 110 and/or for other UEs and select one or two appropriate symbols as the guard period for antenna switching. At this point of time, the actual guard period determined at the gNB 120 is different from the guard period determined at the UE 110.
  • the gNB 120 may send the actual guard period determined at the operation 570 to the UE 110 so that the gNB 120 and the UE 110 can reach an agreement on the position of the guard period.
  • the UE 110 would perform the SRS antenna switching during the actual guard period, and the gNB 120 would not schedule DL and/or UL signal transmissions for the UE 110 during the actual guard period.
  • Fig. 11 is a functional block diagram illustrating an apparatus 600 according to an example embodiment.
  • the apparatus 600 may be implemented at or as a part of a terminal device such as the UE 110 discussed above.
  • the apparatus 600 may comprise a first means 610 for receiving an SRS resource set configuration.
  • the SRS resource set configuration may include at least one SRS resource set configured for SRS antenna switching.
  • the at least one SRS resource set may include two or more SRS resources for SRS transmissions on different antenna ports.
  • the apparatus 600 may further comprise a second means 620 for determining a time-domain position of a guard period where the SRS antenna switching occurs based on indication of a predetermined rule.
  • the predetermined rule may indicate a time-domain positon of the guard period relative to the SRS resources in the at least one SRS resource set for antenna switching.
  • the SRS resource set may include at least two SRS resources for SRS transmissions on different antenna ports, and the guard period may be positioned before and/or after the respective SRS resources.
  • the guard period may be positioned in-between the two SRS resources.
  • the apparatus 600 may further comprise a third means 630 for sending the predetermined rule to a network device such as the gNB 120 discussed above.
  • the predetermined rule may be pre-configured at the UE 110 and it is sent to the gNB 120 before or after the UE 110 receives the SRS resource set for SRS antenna switching.
  • the UE 110 may send the predetermined rule in a capability report to the gNB 120.
  • the apparatus 600 may further comprise a fourth means 640 for receiving the predetermined rule from a network device such as the gNB 120 discussed above.
  • the predetermined rule may be pre-configured at the gNB 120 and it is sent from the gNB 120 to the UE 110 together with the SRS resource set configuration or before the gNB 120 sends the SRS resource set configuration to the UE 110.
  • the apparatus 600 may further comprise a fifth means 650 for determining an actual time-domain position for the guard period when the guard period position determined according to the predetermined rule is unavailable, and a sixth means 660 for reporting the actual time-domain position of the guard period to the network device.
  • a fifth means 650 for determining an actual time-domain position for the guard period when the guard period position determined according to the predetermined rule is unavailable
  • a sixth means 660 for reporting the actual time-domain position of the guard period to the network device.
  • the UE 110 may determine a new available position for the guard period and report the new position to the gNB 120.
  • the apparatus 600 may further comprise a seventh means 670 for receiving indication of an actual time-domain position of the guard period from a network device. For example, if the gNB 120 recognizes that the guard period position determined according to the predetermined rule is unavailable because it has been allocated to other bands for the UE 110 or for other UEs with higher priority, the gNB 120 will determine a new actual time-domain position for the guard period and notify the UE 110 of the new actual position.
  • Fig. 12 is a functional block diagram illustrating an apparatus 700 according to an example embodiment.
  • the apparatus 700 may be implemented at or as a part of a network device such as the gNB 120 discussed above.
  • the apparatus 700 may comprise a first means 710 for configuring a terminal device such as the UE 110 discussed above with an SRS resource set configuration.
  • the SRS resource set configuration may include at least one SRS resource set configured for SRS antenna switching.
  • the at least one SRS resource set may include two or more SRS resources for SRS transmissions on different antenna ports.
  • the apparatus 700 may further comprise a second means 720 for determining a time-domain position of a guard period where the SRS antenna switching occurs based on indication of a predetermined rule.
  • the predetermined rule may indicate a time-domain positon of the guard period relative to the SRS resources in the at least one SRS resource set for antenna switching.
  • the SRS resource set may include at least two SRS resources for SRS transmissions on different antenna ports, and the guard period may be positioned before and/or after the respective SRS resources.
  • the guard period may be positioned in-between the two SRS resources.
  • the apparatus 700 may further comprise a third means 730 for receiving the predetermined rule from the terminal device such as the UE 110 discussed above.
  • the predetermined rule may be pre-configured at the UE 110 and it is sent to the gNB 120 before or after the gNB 120 configures the UE 110 with the SRS resource set configuration.
  • the gNB 120 may receive the predetermined rule in a capability report sent from the UE 110.
  • the apparatus 700 may further comprise a fourth means 740 for transmitting the predetermined rule to the terminal device such as the UE 110.
  • the predetermined rule may be pre-configured at the gNB 120 and it is sent from the gNB 120 to the UE 110 together with the SRS resource set configuration or before the gNB 120 sends the SRS resource set configuration to the UE 110.
  • the apparatus 700 may further comprise a fifth means 750 for receiving indication of an actual time-domain position of the guard period from the terminal device. For example, when the guard period position determined according to the predetermined rule is unavailable, the UE 110 may determine a new available position for the guard period and report the new guard period position to the network device. Then the gNB 120 and the UE 110 can reach an agreement on the position of the guard period for SRS antenna switching.
  • the apparatus 700 may further comprise a sixth means 760 for determining an actual time-domain position for the guard period when the guard period position determined according to the predetermined rule is unavailable, and a seventh means 770 for sending the actual time-domain position of the guard period to the terminal device.
  • a sixth means 760 for determining an actual time-domain position for the guard period when the guard period position determined according to the predetermined rule is unavailable
  • a seventh means 770 for sending the actual time-domain position of the guard period to the terminal device.
  • Fig. 13 is a block diagram illustrating an example communication system 800 in which example embodiments of the present disclosure can be implemented.
  • the communication system 800 may include a terminal device 810 which may be implemented as the UE 110 discussed above, and a network device 820 which may be implemented as the gNB 120 discussed above.
  • Fig. 13 shows only one network device 120, it would be appreciated that the terminal device 810 may wirelessly communicate with two network devices for example in an MR-DC scenario.
  • the terminal device 810 may comprise one or more processors 811, one or more memories 812 and one or more transceivers 813 interconnected through one or more buses 814.
  • the one or more buses 814 may be address, data, or control buses, and may include any interconnection mechanism such as series of lines on a motherboard or integrated circuit, fiber, optics or other optical communication equipment, and the like.
  • Each of the one or more transceivers 813 may comprise a receiver and a transmitter, which are connected to a plurality of antennas 816.
  • the terminal device 810 may wirelessly communicate with the network device 820 through the plurality of antennas 816.
  • the one or more memories 812 may include computer program code 815.
  • the one or more memories 812 and the computer program code 815 may be configured to, when executed by the one or more processors 811, cause the terminal device 810 to perform operations and procedures relating to the UE 110 as described above.
  • the network device 820 may comprise one or more processors 821, one or more memories 822, one or more transceivers 823 and one or more network interfaces 827 interconnected through one or more buses 824.
  • the one or more buses 824 may be address, data, or control buses, and may include any interconnection mechanism such as a series of lines on a motherboard or integrated circuit, fiber, optics or other optical communication equipment, and the like.
  • Each of the one or more transceivers 823 may comprise a receiver and a transmitter, which are connected to a plurality of antennas 826.
  • the network device 820 may operate as a base station for the terminal device 810 and wirelessly communicate with the terminal device 810 through the plurality of antennas 826.
  • the one or more network interfaces 827 may provide wired or wireless communication links through which the network device 820 may communicate with other network devices, entities or functions.
  • the one or more memories 822 may include computer program code 825.
  • the one or more memories 822 and the computer program code 825 may be configured to, when executed by the one or more processors 821, cause the network device 820 to perform operations and procedures relating to the gNB 120 as described above.
  • the one or more processors 811, 821 discussed above may be of any appropriate type that is suitable for the local technical network, and may include one or more of general purpose processors, special purpose processor, microprocessors, a digital signal processor (DSP) , one or more processors in a processor based multi-core processor architecture, as well as dedicated processors such as those developed based on Field Programmable Gate Array (FPGA) and Application Specific Integrated Circuit (ASIC) .
  • the one or more processors 811, 821 may be configured to control other elements of the terminal/network device and operate in cooperation with them to implement the procedures discussed above.
  • the one or more memories 812, 822 may include at least one tangible storage medium in various forms, such as a volatile memory and/or a non-volatile memory.
  • the volatile memory may include but not limited to for example a random access memory (RAM) or a cache.
  • the non-volatile memory may include but not limited to for example a read only memory (ROM) , a hard disk, a flash memory, and the like.
  • the one or more memories 812, 822 may include but not limited to an electric, a magnetic, an optical, an electromagnetic, an infrared, or a semiconductor system, apparatus, or device or any combination of the above.
  • the network device 820 can be implemented as a single network node, or disaggregated/distributed over two or more network nodes, such as a central unit (CU) , a distributed unit (DU) , a remote radio head-end (RRH) , using different functional-split architectures and different interfaces.
  • CU central unit
  • DU distributed unit
  • RRH remote radio head-end
  • blocks in the drawings may be implemented in various manners, including software, hardware, firmware, or any combination thereof.
  • one or more blocks may be implemented using software and/or firmware, for example, machine-executable instructions stored in the storage medium.
  • parts or all of the blocks in the drawings may be implemented, at least in part, by one or more hardware logic components.
  • FPGAs Field-Programmable Gate Arrays
  • ASICs Application-Specific Integrated Circuits
  • ASSPs Application-Specific Standard Products
  • SOCs System-on-Chip systems
  • CPLDs Complex Programmable Logic Devices
  • Some example embodiments further provide computer program code or instructions which, when executed by one or more processors, may cause a device or apparatus to perform the procedures described above.
  • the computer program code for carrying out procedures of the example embodiments may be written in any combination of one or more programming languages.
  • the computer program code may be provided to one or more processors or controllers of a general purpose computer, special purpose computer, or other programmable data processing apparatus, such that the program code, when executed by the processor or controller, cause the functions/operations specified in the flowcharts and/or block diagrams to be implemented.
  • the program code may execute entirely on a machine, partly on the machine, as a stand-alone software package, partly on the machine and partly on a remote machine or entirely on the remote machine or server.
  • Some example embodiments further provide a computer program product or a computer readable medium having the computer program code or instructions stored therein.
  • the computer readable medium may be any tangible medium that may contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
  • the machine readable medium may be a machine readable signal medium or a machine readable storage medium.
  • a machine readable medium may include but is not limited to an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing.
  • machine readable storage medium More specific examples of the machine readable storage medium would include an electrical connection having one or more wires, a portable computer diskette, a hard disk, a random access memory (RAM) , a read-only memory (ROM) , an erasable programmable read-only memory (EPROM or Flash memory) , an optical fiber, a portable compact disc read-only memory (CD-ROM) , an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
  • RAM random access memory
  • ROM read-only memory
  • EPROM or Flash memory erasable programmable read-only memory
  • CD-ROM portable compact disc read-only memory
  • magnetic storage device or any suitable combination of the foregoing.

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

Abstract

Sont divulgués des modes de réalisation fournis à titre d'exemple de procédés et d'appareils pour déterminer une position de période de garde pour une commutation d'antenne de signal de référence sonore. Un procédé implémenté au niveau d'un dispositif terminal peut consister à recevoir une configuration d'ensemble de ressources de signal de référence de sondage (SRS). La configuration d'ensemble de ressources SRS peut comprendre au moins un ensemble de ressources SRS configuré pour une commutation d'antenne SRS entre différents ports d'antenne. Le procédé peut en outre consister à déterminer une position de domaine temporel d'une période de garde où la commutation d'antenne SRS se produit sur la base d'une indication d'une règle prédéterminée.
PCT/CN2021/092973 2021-05-11 2021-05-11 Procédé et appareil pour déterminer une position de période de garde pour une commutation d'antenne srs WO2022236657A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP21941233.5A EP4338515A1 (fr) 2021-05-11 2021-05-11 Procédé et appareil pour déterminer une position de période de garde pour une commutation d'antenne srs
CN202180098105.3A CN117413590A (zh) 2021-05-11 2021-05-11 用于确定srs天线切换的保护时段位置的方法和装置
PCT/CN2021/092973 WO2022236657A1 (fr) 2021-05-11 2021-05-11 Procédé et appareil pour déterminer une position de période de garde pour une commutation d'antenne srs

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WO2023083607A1 (fr) * 2021-11-12 2023-05-19 Nokia Technologies Oy Détermination de la direction spatiale pour la transmission et/ou la réception

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WO2020166818A1 (fr) * 2019-02-15 2020-08-20 엘지전자 주식회사 Procédé par lequel un équipement d'utilisateur transmet un srs dans un système de communication sans fil, et appareil
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CN112154699A (zh) * 2018-05-14 2020-12-29 日本电气株式会社 探测参考信号传输
CN110912664A (zh) * 2018-09-17 2020-03-24 中国移动通信有限公司研究院 一种信息配置的方法和设备
WO2020166818A1 (fr) * 2019-02-15 2020-08-20 엘지전자 주식회사 Procédé par lequel un équipement d'utilisateur transmet un srs dans un système de communication sans fil, et appareil

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WO2023083607A1 (fr) * 2021-11-12 2023-05-19 Nokia Technologies Oy Détermination de la direction spatiale pour la transmission et/ou la réception

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