WO2019028908A1 - METHODS AND COMPUTER DEVICE FOR PERFORMING WIRELESS COMMUNICATION WITH MULTIPLE NODES OF A WIRELESS NETWORK - Google Patents

METHODS AND COMPUTER DEVICE FOR PERFORMING WIRELESS COMMUNICATION WITH MULTIPLE NODES OF A WIRELESS NETWORK Download PDF

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Publication number
WO2019028908A1
WO2019028908A1 PCT/CN2017/097262 CN2017097262W WO2019028908A1 WO 2019028908 A1 WO2019028908 A1 WO 2019028908A1 CN 2017097262 W CN2017097262 W CN 2017097262W WO 2019028908 A1 WO2019028908 A1 WO 2019028908A1
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Prior art keywords
node
measurement
threshold
measurement configuration
cell
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PCT/CN2017/097262
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English (en)
French (fr)
Inventor
Jing Liu
He Huang
Xiaojuan Shi
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Zte Corporation
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Priority to CN201780093682.7A priority Critical patent/CN111034248B/zh
Priority to PCT/CN2017/097262 priority patent/WO2019028908A1/en
Publication of WO2019028908A1 publication Critical patent/WO2019028908A1/en

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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
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers
    • 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

Definitions

  • the present disclosure is related generally to wireless networks and, more particularly, to methods and a computing device for carrying out wireless communication with multiple nodes of a wireless network.
  • a measurement configuration may contain a threshold value (referred to as an s-measure) , which indicates whether or not the UE is required to perform these measurements.
  • an s-measure a threshold value
  • the UE Upon receiving the measurement configuration, if an s-measure is not included or the value of s-measure is equal to 0, the UE should perform the configured measurements immediately. If the s-measure is included and has a value other than 0, the UE should compare s-measure with the cell quality of primary serving cell (PCell) and carry out measurements while the cell quality of PCell is lower than the threshold.
  • PCell primary serving cell
  • FIG. 1 is a diagram of wireless network in which various embodiments of the disclosure are implemented.
  • FIG. 2 shows an example hardware architecture, according to an embodiment.
  • a method for a user equipment to carry out wireless communication with multiple nodes of a wireless network involves a user equipment receiving, from a first node of the wireless network, a first measurement configuration and a first threshold; receiving, from a second node of the wireless network, a second measurement configuration and a second threshold; comparing the first threshold with a quality of a radio signal received from the first node; determining, based on the comparison of the first threshold with the quality of the radio signal being received from the first node, whether to carry out a measurement with the first measurement configuration; comparing the second threshold with a quality of a radio signal received from the second node; and determining, based on a comparison of the second threshold with the quality of the radio signal being received from the second node, whether to carry out a measurement with the second measurement configuration.
  • a method for a user equipment to carry out wireless communication with multiple nodes of a wireless network involves a user equipment: receiving, from a first node of the wireless network, a first threshold and a measurement configuration associated with the second node; receiving, from the second node of the wireless network, a second threshold and a measurement configuration associated with the first node; comparing the first threshold with a quality of a radio signal received from the first node; determining, based on the comparison of the first threshold with the quality of the radio signal being received from the first node, whether to carry out a measurement with the measurement configuration associated with the first node; comparing the second threshold with a quality of a radio signal received from the second node; and determining, based on the comparison of the second threshold with the quality of the radio signal being received from the second node, whether to carry out a measurement with the measurement configuration associated with the second node.
  • a method for multi-beam resource management in a wireless network involves a computing device: wirelessly receiving a first type of reference signal and a second type of reference signal; carrying out a measurement on resource of the first type of reference signal according to a received measurement configuration; determining, based on the measurement, that the resource of the first type of reference signal has triggered a resource specific event of the first type of reference signal; determining a resource of the second type of reference signal that is quasi co-located with the resource of the first type of reference signal; and carrying out beam management on the resource of the second type of reference signal.
  • a method for a user equipment to carry out wireless communication with multiple nodes of a wireless network involves a user equipment: communicating with a first node and a second node of the wireless network as a primary node and a secondary node, respectively; receiving, from a first node of the wireless network, a first measurement configuration, a first threshold, and a second threshold; receiving, from a second node of the wireless network, a second measurement configuration; comparing the first threshold with a quality of a radio signal received from the first node; determining whether to carry out the first measurement based on the comparison of the first threshold with the quality of the radio signal being received from the first node; comparing the second threshold with a quality of a radio signal received from the second node; and determining whether to carry out the second measurement based on a comparison of the second threshold with a quality of a radio signal being received from the second node.
  • a method for a user equipment to carry out wireless communication on a wireless network involves user equipment: camping on a cell of the wireless network in an idle mode; receiving, from the wireless network, a first threshold, a second threshold, and a plurality of measurement configurations, wherein the first threshold is associated with measurements in which radio frequency retuning is needed and the second threshold is associated with measurements in which radio frequency retuning is not needed; receiving broadcast system information from the wireless network; and for each of the plurality of measurement configurations, determining which of the plurality of measurement configurations are to be carried out using frequencies for radio frequency retuning is needed; for each of the plurality of measurement configurations determined to be carried out using frequencies for which chain retuning is needed, carrying out a measurement using the measurement configuration and comparing the carried out measurement with the first threshold; determining which of the plurality of measurement configurations are to be carried out using frequencies for radio frequency retuning is not needed; for each of the plurality of measurement configurations determined to be carried out using frequencies for
  • FIG. 1 depicts a wireless network 100 in which the various embodiments may be deployed.
  • the wireless network 100 includes several wireless communication nodes, each of which is capable of wireless and, in some cases, wired communication. For ease of reference, only two nodes—a first node 102 and a second node 104—are depicted. Examples of a communication node include a base station of a cellular network, a relay node, and a wireless mobile device (such as a cellphone) .
  • the first node 102 and second node 104 may operate using the same radio access technology or using different radio access technologies. Also depicted in FIG.
  • UE1 and UE2 are capable of communicating via the wireless network 100.
  • Each area of wireless coverage for each node e.g., each area that each node serves for wireless clients
  • Each node may define multiple cells but, for purposes of illustration, each node of FIG. 1 is depicted as covering a single cell—with the first node 102 serving a first cell 106 and the second node 104 service a second cell 108.
  • the wireless network 100 has many components that are not depicted in FIG. 1, including other base stations, wireless infrastructure, wired infrastructure, and other devices commonly found in wireless networks. Furthermore, there may be many, many additional UEs besides UE1 and UE2 that communicate via the wireless network 100.
  • Possible implementations of a user equipment include any device capable of wireless communication, such as a smartphone, tablet, laptop computer, and non-traditional devices (e.g., household appliances or other parts of the “Internet of Things” ) .
  • any of the nodes of FIG. 1 may be thought of as carrying out the action or receiving the result of the action being discussed.
  • FIG. 2 illustrates a basic (computing device) hardware architecture implemented by the elements of FIG. 1, including the UEs and the nodes.
  • the elements of FIG. 1 have other components as well.
  • the hardware architecture depicted in FIG. 2 includes logic circuitry 202, memory 204, transceiver 206, and one more antennas represented by antenna 208.
  • the memory 204 may be or include a buffer that, for example, holds incoming transmissions until the logic circuitry is able to process the transmission.
  • Each of these elements is communicatively linked to one another via one or more data pathways 210. Examples of data pathways include wires, conductive pathways on a microchip, and wireless connections.
  • each of the devices depicted in FIG. 1 may have many other components not shown in FIG. 2.
  • logic circuitry means a circuit (atype of electronic hardware) designed to perform complex functions defined in terms of mathematical logic. Examples of logic circuitry include a microprocessor, a controller, or an application-specific integrated circuit. When the present disclosure refers to a device carrying out an action, it is to be understood that this can also mean that logic circuitry integrated with the device is, in fact, carrying out the action.
  • the act of transmission or sending may include unicast transmission, multicast transmission, or broadcast transmission.
  • UEs are generally required by cellular networks to carry out measurements on intra-frequency, inter-frequencies and inter-radio access technology (RAT) frequencies to facilitate mobility management or other radio resource management functions, because when UEs are required to carry out measurements (especially for inter-frequency and inter-RAT frequency) their power consumption increases and, consequently, their battery life decreases.
  • RAT inter-radio access technology
  • the network when the network sends measurement configurations to a UE, the network can include a parameter in the measurement configuration message—referred to as an “s-measure, ” which indicates to the UE when to perform the configured measurement.
  • the s-measure describes a threshold, and a UE receiving the s-measure should (1) measure the cell quality of serving cell all the time, and (2) when the radio quality of the serving cell (e.g., the quality of the cell as defined by the node with which the UE is communicating) falls below s-measure, start carrying out measurements (in accordance with the measurement configuration (s) received from the network) of the configured intra- frequency, inter-frequency and inter-RAT neighbor cells. If and when the radio quality of the serving cell is goes back up above s-measure, then the UE can stop carrying out the measurements of the configured intra-frequency, inter-frequency, and inter-RAT neighbor cells.
  • the radio quality of the serving cell e.g., the quality of the cell as defined by the node with which the UE is communicating
  • the UE When a UE communicates via a wireless network using, for example, dual connectivity, the UE may have multiple simultaneous serving cells belonging to different nodes, which are referred to as a primary node and a secondary node.
  • the cell of the primary node that the UE uses for communication is referred to as a PCell and the primary cell of the secondary node that the UE uses is referred to as a PSCell.
  • the wireless network will (in conjunction with the UE) carry out procedures to change the primary node and/or the secondary node (e.g., make another cell the PCell and/or make another cell the PSCell) to ensure service to the UE is continuous.
  • each of the nodes 102 and 104 transmits its own measurement configurations and s-measures to the UE, which the UE uses to determine whether measurements need to be taken (and, possibly, whether to switch to different nodes—e.g., switch PSCells) .
  • both the primary node and the secondary node can transmit measurement configurations to the UE.
  • each node can include a measurement activation threshold within each node’s measurement configuration.
  • the measurement activation threshold configured by the primary node e.g., the first node 102
  • the measurement activation threshold configured by secondary node e.g., the second node 104
  • the UE upon receiving the measurement configurations, s-measure1, and s-measure2 from the primary node and the secondary node (e.g., node 102 and node 104) , the UE (e.g., UE1) compares the cell quality of the PCell (e.g., the first cell 106) with s-measure1 and, based on the comparison, determines whether to carry out measurements using the measurement configuration (s) received from the primary node. The UE also compares the cell quality of the PSCell (e.g., the second cell 108) with s-measure2 and, based on the comparison, determines whether to carry out measurements using the measurement configurations configured by secondary node.
  • the PCell e.g., the first cell 106
  • s-measure1 determines whether to carry out measurements using the measurement configuration (s) received from the primary node.
  • the UE also compares the cell quality of the PSCell (e.g., the second cell 108) with s-measure2 and, based on
  • the UE in case one node does not configure the s-measure or the configured s-measure is equal to 0, following alternatives can be selected as predefined: (1) The UE should perform the measurement configurations configured by the corresponding node. (2) If the reference node is the primary node, the UE should perform the measurement according to the measurement configuration received from the primary node. if reference node is secondary node, then the UE should follow the same measurement active mechanism for all configured measurements as in primary node.
  • the primary node 102 transmits measurement configurations A, B and C to the UE 106, and includes s-measure1 within the measurement configuration.
  • the secondary node 104 transmits measurement configurations D, E and F to the UE 106, and includes s-measure2 within the measurement configuration.
  • UE1 compares the cell quality of the PCell (the primary node 102 in this case) with s-measure1 and carries out measurements A, B and C while the cell quality of the PCell is below s-measure1. Otherwise, UE1 is not required to carry out measurements A, B and C.
  • UE1 compares the cell quality of PSCell with s-measure2, and carries out measurements D, E and F as long as the cell quality of PSCell is below s-measure2. Otherwise, UE1 is not required to carry out measurements D, E and F.
  • the primary node 102 sends measurement configurations A, B and C to UE1 and includes s-measure1 within the measurement configuration.
  • the secondary node 104 sends measurement configuration D, E and F to UE1, and does not include a measurement active threshold (i.e., no s-measure) within the measurement configurations or includes an s-measure2 with a value equal to 0.
  • UE1 compares the cell quality of the PCell with s-measure1 and carries out measurements A, B and C for as long as the cell quality of the PCell is below s-measure1. Otherwise, UE1 is not required to carry out measurements A, B and C. If the s-measure is not configured by the secondary node 104, or the configured s-measure2 is equal to 0, UE1 will carries out measurements D, E and F.
  • the primary node 102 sends measurement configurations A, B and C to UE1 and includes s-measure1 within the measurement configuration.
  • the secondary node 104 send measurement configurations D, E and F to UE1 and does not include a measurement active threshold (i.e., s-measure) within the measurement configurations or includes s-measure2 with a value equal to 0.
  • UE1 should follow the same principle as in the primary node. Thus UE1 compares the cell quality of the PCell with s-measure1 and carries out measurements A, B, C, D, E and F while the cell quality of the PCell is below s-measure1. Otherwise, UE1 is not required to carry out measurements A, B, C, D, E and F.
  • the primary node sends measurement configurations A, B and C to UE1, and without including measurement active threshold within the measurement configuration or includes s-measure1 with value equal to 0.
  • the secondary node send measurement configuration D, E and F to UE1, and includes s-measure2 within the measurement configuration.
  • UE1 Based on not receiving an s-measure from the primary node 102 or the receiving an s-measure1 equal to 0, UE1 will carry out measurements according to measurement configurations A, B and C.
  • UE1 also compares the cell quality of the PSCell with s-measure2 and carries out measurements D, E and F for as long as the cell quality of the PSCell is below s-measure2. Otherwise, UE1 is not required to carry out measurements D, E and F.
  • the primary node 102 sends measurement configuration A, B and C to UE1 without including a measurement active threshold (an s-measure) within the measurement configurations, or includes s-measure1 with a value equal to 0.
  • the secondary node 104 sends measurement configurations D, E and F to UE1 without including a measurement active threshold (an s-measure) within the measurement configuration, or includes s-measure2 with a value equal to 0. If an s-measure is not configured by the primary node 102 or the secondary node 104, or the configured s-measure1 and s-measure2 are equal to 0, UE1 will carry out measurements according to measurement configurations A, B, C, D, E and F.
  • each of the primary and secondary nodes transmits its own s-measure and its own measurement configuration but may send the other node’s measurement configuration as well (e.g., every third measurement configuration sent by the PCell is associated with the PSCell) .
  • both the primary node and secondary node can send measurement configurations to the UE.
  • part of the measurement configured by the primary node may be associated with the secondary node (for example, the cell quality of PSCell may be involved in the measurement evaluation) and vice versa.
  • each node can include a measurement activation threshold (e.g., s-measure) within each node’s measurement configuration.
  • the measurement activation threshold configured by the primary node will be referred to as s-measure1 and the measurement activation threshold configured by the secondary node will be referred to as s-measure2.
  • the UE upon receiving the measurement configurations from the primary node and the secondary node, and upon receiving s-measure1 and s-measure2, the UE should compare the cell quality of the PCell with s-measure1 and, based on this comparison determine whether to carry out the measurement configurations associated with the primary node. The UE also compares the cell quality of the PSCell with s-measure2 and, based on this comparison, determine whether to carry out measurements according to the measurement configurations associated with the secondary node.
  • the following alternatives can be selected as predefined: (1) the UE should perform the measurement configurations associated with the corresponding node. (2) If the reference node is the primary node, the UE should carry out the measurements set forth by the measurement configurations associated with primary node. If the reference node is the secondary node, the UE should follow the same measurement active mechanism for all configured measurements as in the primary node.
  • the primary node 102 sends measurement configurations A, B and C to UE.
  • Measurement configurations A and B are associated with primary node 102, while configuration C is associated with secondary node 104.
  • the primary node 102 includes s-measure1 within the measurement configuration.
  • the secondary node 104 sends measurement configurations D, E and F to UE1.
  • Configurations D and E are associated with the secondary node 104 while configuration F is associated with primary node 102.
  • the secondary node 104 includes s-measure2 within the measurement configuration.
  • UE1 compares the cell quality of the PCell with s-measure1 and carries out measurements A, B and F while the cell quality of the PCell is below s-measure1.
  • UE1 is not required to carry out measurements A, B and F.
  • UE1 also compares the cell quality of the PSCell with s-measure2, and carries out measurements C, D and E while the cell quality of PSCell is below s-measure2. Otherwise, UE1 is not required to carry out measurements C, D and E.
  • the primary node 102 sends measurement configurations A, B and C to UE1.
  • Configurations A and B are associated with the primary node, 102 while configuration C is associated with the secondary node 104.
  • the primary node 102 includes s-measure1 with the measurement configuration.
  • the secondary node 104 sends measurement configurations D, E and F to UE1.
  • Configurations D and E are associated with secondary node 104 and configuration F is associated with the primary node 102.
  • the secondary node 104 sends these configurations without including a measurement active threshold (s-measure) within the measurement configuration or includes s-measure2 with value equal to 0.
  • s-measure measurement active threshold
  • UE1 compares the cell quality of the PCell with s-measure1 and, based on this comparison, carries out measurements based on configurations A, B and F while the cell quality of the PCell is below s-measure1. Otherwise, UE1 is not required to carry out measurements based on configurations A, B and F. If the s-measure is not configured by the secondary node 104, or the configured s-measure2 is equal to 0, UE1 carries out measurements based on configurations C, D and E.
  • each node e.g., each of the Pcell and PSCell to which a UE is communicatively linked for DC communication
  • both the primary node and the secondary node can send measurement configurations to the UE.
  • each node can include a measurement activation threshold within each node’s measurement configuration.
  • each node can include an indication that shows which cell’s quality is required to compare with the measurement activation threshold. The possible value range of this indication may include at least ⁇ PCell, PSCell ⁇ .
  • the measurement activation threshold configured by the primary node will be referred to as s-measure1, and the measurement activation threshold configured by secondary node will be referred to as s-measure2.
  • the cell indication configured by the primary node will be referred to as cell-ind1, and the cell indication configured by secondary node will be referred to as cell-ind2.
  • the UE Upon receiving the measurement configurations from the primary node and the secondary node, and receiving s-measure1, s-measure2, cell-ind1 and cell-ind2, the UE should compare the cell quality of the cell which indicated by cell-ind1 with s-measure1 and, based on this comparison, determine whether to perform the measurements using measurement configurations configured by the primary node. The UE also compares the cell quality of the cell which indicated by cell-ind2 with s-measure2 to decide whether to perform the measurements indicated by the measurement configurations received from the secondary node.
  • the following alternatives can be selected as predefined in an embodiment: (1) If the configured cell indication corresponds to the node (i.e., primary node with the indication configured as an PCell or the secondary node with the indication configured as a PSCell) , the UE should perform the measurement configurations configured by the corresponding node. (2) If the configured cell indication does not correspond to the node (i.e., the primary node with the indication configured as a PSCell or the secondary node with the indication configured as a PCell) , the UE should follow the same measurement active mechanism as in the non-reference node.
  • Example scenarios where each node transmits a measurement configuration, s-measure, and an indication of which node (e.g., which cell—Pcell or PSCell) the measurement configuration and s-measure apply to (according to an embodiment) are shown.
  • the primary node 102 sends measurement configurations A, B and C to UE1, and includes s-measure1 and cell-ind1 of value ‘PCell’ within the measurement configuration.
  • the secondary node 104 sends measurement configurations D, E and F to UE1, and includes s-measure2 and cell-ind2 of value ‘PCell’ within the measurement configuration.
  • UE1 compares the cell quality of the PCell with s-measure1 and carries out measurements A, B and C while the cell quality of PCell is below s-measure1. Otherwise, UE1 is not required to carry out measurements A, B and C.
  • UE1 also compares the cell quality of the PCell with s-measure2, and carries out measurements D, E and F while the cell quality of the PCell is below s-measure2. Otherwise, UE1 is not required to carry out measurements D, E and F.
  • the primary node 102 sends measurement configurations A, B and C to UE1 and includes s-measure1 and cell-ind1 with a value of ‘PCell’ within the measurement configuration.
  • the secondary node 104 sends measurement configurations D, E and F to UE1 and includes s-measure2 and cell-ind2 with a value of ‘PSCell’ within the measurement configuration.
  • UE1 compares the cell quality of PCell with s-measure1 and carries out measurements A, B and C while the cell quality of PCell is below s-measure1. Otherwise, UE1 is not required to carry out measurements A, B and C.
  • UE1 also compares the cell quality of PSCell with s-measure2, and carries out measurements D, E and F while the cell quality of PSCell is below s-measure2. Otherwise, UE1 is not required to carry out measurements D, E and F.
  • the primary node 102 sends measurement configurations A, B and C to UE1, and includes s-measure1 and cell-ind1 with a value of ‘PCell’ within the measurement configuration.
  • the secondary node 104 sends measurement configurations D, E and F to UE1, and includes cell-ind2 of value ‘PCell’ within the measurement configuration, but does not include a measurement active threshold (s-measure) or includes s-measure2 with value equal to 0.
  • UE1 compares the cell quality of PCell with s-measure1 and carries out measurements A, B and C while the cell quality of PCell is below s-measure1. Otherwise, UE1 is not required to carry out measurements A, B and C.
  • UE1 should follow the same measurement active mechanism as in primary node 102. UE1 compares the cell quality of PCell with s-measure1 and carries out measurements D, E and F while the cell quality of PCell is below s-measure1. Otherwise, UE is not required to carry out measurements D, E and F.
  • the primary node 102 sends measurement configurations A, B and C to UE1 and includes s-measure1 and cell-ind1 with a value of ‘PCell’ within the measurement configuration.
  • the secondary node 102 sends measurement configurations D, E and F to UE1 and includes cell-ind2 with a value of ‘PSCell’ within the measurement configuration, but does not include a measurement active threshold (s-measure) or includes s-measure2 with value equal to 0.
  • UE1 compares the cell quality of PCell with s-measure1 and carries out measurements A, B and C while the cell quality of PCell is below s-measure1. Otherwise, UE1 is not required to carry out measurements A, B and C. If the s-measure is not configured by the secondary node 104 or the configured s-measure2 is equal to 0, but the indication is set to ‘PSCell’ , UE1 carries out measurements D, E and F.
  • a primary node transmits both its own s-measure and the s-measure of the secondary node to the UE, but the primary and secondary nodes each transmit their own measurement configurations to the UE.
  • both the primary node and the secondary node can send measurement configurations to the UE.
  • the primary node can include multiple measurement activation thresholds associated with each node’s measurement configuration.
  • the multiple measurement activation thresholds configured by the primary node are referred to as s-measure1 and s-measure2, where s-measure1 is associated with the primary node and s-measure2 is associated with the secondary node. This association relationship can be indicated by separate parameters or implicitly by the order of array elements.
  • the UE Upon receiving the measurement configurations from the primary node and the secondary node, and receiving s-measure1 and s-measure2 from the primary node, the UE compares the cell quality of the PCell with s-measure1 and, based on this comparison, determine whether to carry out the measurement configurations configured by the primary node. The UE also compares the cell quality of the PSCell with s-measure2 to decide whether to perform the measurement configurations configured by secondary node.
  • the following alternatives can be selected as predefined: (1) The UE should perform the measurement configurations configured by the associated node. (2) If s-measure1 is not configured, the UE should perform the measurement configurations configured by primary node. If s-measure2 is not configured, the UE should follow the same measurement active mechanism as in primary node.
  • Example scenarios in which a primary node transmits both its own s-measure and the s-measure of the secondary node to the UE, but the primary and secondary nodes each transmit their own measurement configurations to the UE will now be described.
  • the primary node 102 sends measurement configurations A, B and C to UE1 and includes s-measure1 and s-measure2 within the measurement configuration, in which s-measure1 is associated with the primary node 102 and s-measure2 is associated with secondary node 104.
  • the secondary node 104 sends measurement configurations D, E and F to UE1.
  • UE1 compares the cell quality of PCell with s-measure1 and carries out measurements A, B and C while the cell quality of the PCell is below s-measure1. Otherwise UE1 is not required to carry out measurements A, B and C. UE1 compares the cell quality of PSCell with s-measure2 and carries out measurements D, E and F while the cell quality of PSCell is below s-measure2. Otherwise, UE1 is not required to carry out measurements D, E and F.
  • the primary node 102 sends measurement configurations A, B and C to UE1 and includes s-measure1 within the measurement configuration that is associated with the primary node 102, but does not send the measurement active threshold (s-measure) associated with the secondary node 104, or the primary node 102 includes s-measure2 with value equal to 0.
  • the secondary node 104 sends measurement configurations D, E and F to UE1.
  • UE1 compares the cell quality of the PCell with s-measure1 and carries out measurements A, B and C while the cell quality of PCell is below s-measure1. Otherwise, UE1 is not required to carry out measurements A, B and C. If the s-measure associated with secondary node 104 is not configured by primary node 102, or the configured s-measure2 is equal to 0, UE1 carries out measurements D, E and F.
  • the UE For an idle state UE in a cellular system, the UE is configured with two thresholds via broadcast system information sent by the network, where one threshold is used to activate intra-freq measurement while another is used to activate inter-freq and inter-RAT measurement.
  • the UE For intra-freq measurements, the UE is not required to retune the radio frequency (RF) , but for inter-freq measurements, the UE is required to retune the RF to the frequency of neighbor cells.
  • RF radio frequency
  • inter-freq measurements the UE is required to retune the RF to the frequency of neighbor cells.
  • the definition of intra-freq and inter-freq may be different, and may be decoupled from the RF capability.
  • the network can configure multiple measurements in broadcast system information sent from the network to UE to assist cell re-reselection.
  • the network includes two thresholds in broadcast system information, in which one of the thresholds (e.g., threshold1) is associated with the measurements in which RF chain retuning is not needed and the other threshold (e.g., threshold2) is associated with the measurements in which RF chain retuning is needed.
  • the UE Upon receiving the broadcast system information, the UE evaluates each measurement frequency based on UE’s RF capability to decide whether RF retuning is needed to perform the measurement. Then the UE compares the cell quality of the camping cell (the cell on which the UE was camping) with threshold1 to determine whether or not to perform the measurements without RF retuning, and compares the cell quality of camping cell with threshold2 to decide whether or not to perform the measurements with RF retuning.
  • the network 100 configures measurements A, B, C and D for cell re-selection in the broadcast system information.
  • the network 100 includes threshold1 and threshold2 in the broadcast system information, where threshold1 is associated with measurements in which RF chain retuning is not needed and threshold2 is associated with the measurements in which RF chain retuning is needed.
  • UE1 and UE2 have different RF capabilities and are camping on the cell 106.
  • UE1 can carry out measurements A and B without RF retuning but needs to carry out measurements C and D with RF retuning.
  • UE1 compares the cell quality of the cell 106 with threshold1 and threshold2, and carries out measurements A and B, while the cell quality of the cell 106 is less than or equal to threshold1. Otherwise, UE1 is not required to carry out measurements A and B.
  • UE1 carries out measurements C and D while the cell quality of the cell 106 is less than or equal to threshold2. Otherwise, UE1 is not required to carry out measurements C and D.
  • UE2 can carry out measurements A, B, and C without RF retuning but needs to carry out measurement D with RF retuning.
  • UE2 compares the cell quality of the cell 106 with threshold1, and carries out measurements A, B and C while the cell quality of the cell 106 is less than or equal to threshold1. Otherwise, UE2 is not required to carry out measurements A, B and C.UE2 carries out measurement D while the cell quality of cell 106 is less than or equal to threshold2. Otherwise, UE2 is not required to carry out measurement D.
  • any and all of the methods described herein are carried out by or on one or more computing devices. Furthermore, instructions for carrying out any or all of the methods described herein may be stored on a non-transitory, computer-readable medium, such as any of the various types of memory described herein.

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