WO2014058361A1 - Méthode et nœud de communication pour la gestion d'interférence - Google Patents

Méthode et nœud de communication pour la gestion d'interférence Download PDF

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Publication number
WO2014058361A1
WO2014058361A1 PCT/SE2012/051081 SE2012051081W WO2014058361A1 WO 2014058361 A1 WO2014058361 A1 WO 2014058361A1 SE 2012051081 W SE2012051081 W SE 2012051081W WO 2014058361 A1 WO2014058361 A1 WO 2014058361A1
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WO
WIPO (PCT)
Prior art keywords
transceiver
interference
antennas
communication node
sim
Prior art date
Application number
PCT/SE2012/051081
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English (en)
Inventor
Joachim Sachs
Reihaneh Malekafzaliardakani
Yngve SELÉN
Leif Wilhelmsson
Original Assignee
Telefonaktiebolaget Lm Ericsson (Publ)
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 Telefonaktiebolaget Lm Ericsson (Publ) filed Critical Telefonaktiebolaget Lm Ericsson (Publ)
Priority to PCT/SE2012/051081 priority Critical patent/WO2014058361A1/fr
Publication of WO2014058361A1 publication Critical patent/WO2014058361A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/14—Spectrum sharing arrangements between different networks
    • 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
    • H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals

Definitions

  • Embodiments herein relate to a communication node and a method therein. In particular, embodiments herein relate to managing interference between multiple transceivers.
  • wireless communication services such as cellular services, e.g., LTE, HSPA, local services, e.g., WiFi, ad-hoc services, e.g., Bluetooth, and positioning services, e.g., GPS.
  • cellular services e.g., LTE, HSPA
  • local services e.g., WiFi
  • ad-hoc services e.g., Bluetooth
  • positioning services e.g., GPS.
  • the transceivers share a common antenna system.
  • One example of such an object is a vehicle that has multiple cellular transceivers built-in, which are connected to a common antenna system.
  • most vehicles may have strong shielding due to thermal isolation.
  • the vehicle interior may then become a coverage hole from the cellular perspective.
  • the antenna system may typically be located on the outside of the vehicle, and therefore not shielded, wireless devices within the vehicle such as user equipment's, cell phones or tablets may not be able to transmit and receive directly to and from the cellular infrastructure due to the shielding.
  • Wireless devices within the vehicle may be able to connect to the transceivers via some short- range communication, e.g. Bluetooth, WiFi, to configure those transceivers as, remote wireless devices with their communication credentials, e.g., remote SIM profile in
  • Another example of such an object with multiple transceivers sharing a common antenna system is a device that has multiple transceivers which can connect
  • a use case could be for critical control or measurements devices, e.g., which are monitoring a power grid operation or other control process, e.g., in industrial automation or critical infrastructure protection.
  • critical control or measurements devices e.g., which are monitoring a power grid operation or other control process, e.g., in industrial automation or critical infrastructure protection.
  • multiple transceivers use the same antenna system simultaneously, such as in the examples just provided, there may be some coupling interference among the reception/transmission signals due to the physical proximity of the transceivers and the connection to a common antenna system.
  • the interference is primarily caused by the transmitted signal of one transceiver coupling into the receiving part of another transceiver.
  • the object is achieved by a method in a communication node, for managing interference between a first transceiver and at least a second transceiver.
  • the communication node comprises at least the first transceiver and the second transceiver.
  • the first and second transceivers are arranged to be connected to an antenna set comprising at least two antennas.
  • the communication node determines an interference between a signal associated with the first transceiver and at least a signal associated with the second transceiver.
  • the communication node configures a first connection between a transmitting part of the first transceiver and one or more first antennas of the antenna set, and configures a second connection between a receiving part of the second transceiver and one or more second antennas of the antenna set. At least one antenna is different between the one or more first antennas and the one or more second antennas.
  • the object is achieved by a communication node, for managing interference between a first transceiver and at least a second transceiver.
  • the communication node comprises at least the first transceiver and the second transceiver.
  • the first and second transceivers are arranged to be connected to an antenna set comprising at least two antennas.
  • the communication node comprises: a processing circuit.
  • the processing circuit is configured to determine an interference between a signal associated with the first transceiver and at least a signal associated with the second transceiver.
  • the processing circuit is also configured to, when the
  • one antenna is different between the one or more first antennas and the one or more second antennas.
  • An advantage of embodiments herein is that by connecting different transceivers to different antennas, at !east partly, the coupling interference is avoided or at !east reduced. This results in that the performance of communications in the communication node is improved.
  • a further advantage according to embodiments herein is that the transmission performance can be improved due to the reduced coupling interference.
  • a yet further advantage according to embodiments herein is that the number of antenna systems can be reduced since a common antenna system can be used for multiple transceivers.
  • Figure 1 is a schematic block diagram illustrating embodiments in a communication node that has multiple transceivers which share a common antenna system.
  • Figure 2 is a flowchart depicting embodiments of a method in a communication node.
  • Figure 3 is a schematic block diagram illustrating embodiments of a communication
  • FIG. 1 depicts a communication node 100 in which embodiments herein may be implemented.
  • the communication node 100 is a wireless communication node such as a communication node embedded within a vehicle or a control unit.
  • the communication node 100 has more than one transceiver.
  • the communication node 100 comprises a first transceiver 111 and a second transceiver 112.
  • the accompanying description is based on embodiments wherein the communication node 100 has two transceivers.
  • each of the first transceiver 11 1 and second transceiver 1 12 may contain at ieast a transmitter, or transmitting part, and a receiver, or receiving part. In other embodiments, each of the first transceiver 11 1 and second transceiver 1 12 may contain oniy a transmitting part or only a receiving part.
  • the first transceiver 1 1 and second transceiver 1 12 may be a e.g. one of a GSM, WCDMA, LTE, WiMAX, CDMA2000, WLAN, DVB, or DAB transceiver.
  • the first transceiver 11 1 and the second transceiver 122 share a common antenna system 120.
  • the antenna system 120 comprises two or more antennas, that may be arranged to be connected to at Ieast one of a plurality of transceivers. In the embodiment shown in Figure 1 , the antenna system 120 has n antennas.
  • the antennas in the antenna system 120 may be of any antenna type known in the art.
  • Each of the antennas in antenna system 120 enables transmission or reception of radio signals to or from further network nodes, i.e., other network nodes, where the networks nodes may be base stations in a cellular communication network, e.g., GSM, WCDMA, LTE, WiMAX, CDMA2000, access points or stations in a wireless local area network, e.g., WiFi, DSRC, 802.15, or broadcast stations, e.g., DAB, DVB.
  • a cellular communication network e.g., GSM, WCDMA, LTE, WiMAX, CDMA2000
  • access points or stations in a wireless local area network e.g., WiFi, DSRC, 802.15, or broadcast stations, e.g., DAB, DVB.
  • the first transceiver 1 1 1 is arranged to be connected to a first network node 131 through one or more of the 1 to n antennas in the antenna set 120, via one or more of 1 to n links 141.
  • Each of the 1 to n links 141 may communicate each of the 1 to n antennas, respectively, with the network node 131 , as shown in Figure 1.
  • the communication path from the first transceiver 1 1 1 to the first network node 131 is depicted in Figure 2 with solid lines.
  • the second transceiver 112 is arranged to be connected to a second network node 132 through one or more of the 1 to n antennas in the antenna set 120, via one or more of 1 to n finks 142.
  • Each of the 1 to n links 142 may communicate each of the 1 to n antennas, respectively, with the network node 132, as shown in Figure 1.
  • the communication path from the second transceiver 1 12 to the second network node 132 is depicted in Figure 2 with thick hatched lines.
  • each of the transmitting and receiving parts of the first transceiver 1 1 1 and the second transceiver 112 may be configured to be connected to one or more antennas of the antenna set 120.
  • the transmitting part of the first transceiver 111 may be configured to be connected to one or more first antennas
  • the receiving part of the second transceiver 1 12 may be configured to be connected to one or more second antennas
  • the transmitting part of the second transceiver 1 12 may be configured to be connected to one or more third antennas
  • the receiving part of the first transceiver 1 1 1 may be configured to be connected to one or more fourth antennas.
  • each of these one or more first, second, third and fourth antennas may be the same, whereas in other embodiments, each or some these one or more first, second, third and fourth antennas may be different, as will be described below.
  • the antenna system 120 may be arranged to be connected to the first transceiver 11 and the second transceiver 1 12 through a
  • the switching system 160 enables the transceivers to be connected to the different antennas.
  • the switching system 160 may be a system that enables selectively connecting antennas to the transmitters and/or receivers of the at least one of a multitude of transceivers, such as first transceiver 11 and the second transceiver 1 12.
  • the first transceiver 1 11 may be arranged to be connected with a first wireless device 171 while the second transceiver 1 12 may be arranged to be connected with a second wireless device 172.
  • the first wireless device 71 and the second wireless device 172 may, for example, be mobile terminals or wireless terminals, mobile phones, computers such as, e.g., a laptop, Personal Digital Assistant, PDA, or tablet computers, sometimes referred to as surf plates, with wireless capability, devices equipped with a wireless interface, such as a printer or a file storage device or any other radio network unit capable of communicating over a radio or wired link in a cellular communications system.
  • the first transceiver 1 1 1 may be arranged to be connected with the first wireless device 171 through a first link 181
  • the second transceiver 112 may be arranged to be connected with the second wireless device 172 through a second link 182.
  • the first and second links, 151 and 152, respectively, may be, e.g., established via some short range radio technology, such as Bluetooth or WiFi or via some fixed technology communicating via a cable.
  • the first transceiver 1 1 1 may be associated with a first Subscriber Identity Module, SIM, and the second transceiver 112 may be associated with a second SIM, neither of which is depicted in Figure 1.
  • SIM Subscriber Identity Module
  • Each of the SIMs may be a either a SIM card or a software SIM, and it may comprise at least the subscription credentials that enable communication with a cellular network.
  • S!Ms may allow the respective transceiver to communicate with the cellular network nodes and the radio technologies and frequency carriers that are authorized by the subscription.
  • At least one of the first transceiver 1 and the second transceiver 112 may be associated with the first SIM, and second SIM, respectively, by a remote-SIM-access connectivity that is established via a wireless technology. This may happen for example when wireless devices within a vehicle having multiple transceivers can connect to the transceivers via some short-range
  • Bluetooth wireless local area network
  • WiFi wireless personal area network
  • At least one of the first transceiver 11 1 and the second transceiver 112 may be associated with the first SIM, and second SIM, respectively, by a physical connection of a SIM to the at least one of first transceiver 1 1 1 and the second transceiver 12. This may happen for example when a hardware SIM is connected to the transceiver via a connector.
  • At least one of the first transceiver 1 11 and the second transceiver 12 may be associated with the first SIM, and second SIM, respectively, by a dynamic re-configuration of a software-based SIM, that is embedded in at least one of the first transceiver 11 1 and the second transceiver 1 12 and is
  • the reprogramming can be achieved by any of the credential provisioning schemes known in the art, such, e.g., those defined by 3GPP or GSMA.
  • each of the additional transceivers may be associated with its own SIM.
  • the communication node 100 may be located in a vehicle, such as a car, and the antenna set may be located on the outside of the vehicle.
  • managing the interference may mean to reduce an existing or a predicted interference, while in other embodiments, managing the interference may mean to avoid an existing or predicted interference altogether, as described below.
  • the communication node 100 comprises at least the first transceiver 1 1 1 and the second transceiver 1 12, wherein the first and second transceivers 1 1 1 , 1 12 are arranged to be connected to the antenna set 120 comprising at least two antennas.
  • the communication node 100 may need to find out what this interference is, or what it may be. Therefore, in this action, in order to manage the interference between the first transceiver 1 1 1 and at least the second transceiver 112, the communication node 100 determines the interference between a signal associated with the first transceiver 1 1 1 and at least a signal associated with the second transceiver 1 12.
  • the signal associated with the first transceiver 11 1 may be a transmitted or received signal towards a cellular network, a wireless local area access point or station, or a received broadcast signal.
  • the signal associated with the second transceiver 1 12, as defined above, may be a transmitted or received signal towards a cellular network, a wireless local area access point or station, or a received broadcast signal.
  • the accompanying description is based on the embodiments wherein the interference occurs between a signal associated with the first transceiver 1 1 1 and a signal associated with the second transceiver 1 12. However, in other embodiments, the interference may occur between a signal associated with the first transceiver 1 1 1 and more than one signal associated with the second transceiver 1 12.
  • the embodiments herein described also apply to interference between a signal associated with the first transceiver 1 1 1 and more than one signal associated with the second transceiver 1 12, as one of skill in the art will appreciate.
  • the communication node 100 may determine the interference by several methods. In some embodiments, the communication node 100 may determine the interference by estimating the interference between the signal associated with the first transceiver 1 1 and at least the signal associated with the second transceiver 1 2. In these embodiments, the communication node 100 may calculate an estimation of the interference between the signal associated with the first transceiver 111 and at least the signal associated with the second transceiver 112.
  • the communication node 100 may estimate, for a potential transmission of a first signal by the first transceiver 1 1 1 , the expected interference caused to the receiver contained in the second transceiver 1 12. This estimation may be made for each possible combination pair Ax/Ay, where Ax is the antenna that would be used by the first transceiver 1 1 for transmission, and Ay is the antenna that would be used by the second transceiver 112 for reception. Several aspects may be considered for this estimation.
  • the coupling interference may depend on the frequency separation between the multiple signals which are simultaneously transmitted or received.
  • the coupling interference may decrease with larger spectrum separation, but this relationship may not be strict, and in general the relationship may be known.
  • a transceiver may apply a receiver filter with a certain characteristic on how signals outside the frequency range of the desired communication channel are attenuated.
  • some aspects that may be considered for the estimation of the interference between the signal associated with the first transceiver 1 1 1 and at least the signal associated with the second transceiver 1 12 are such as the coupling gain 150 between antennas Ax Ay, possibly also the feeder loss between Ay and the second transceiver 112, and/or the coupling characteristics of the receiver in the second transceiver 112, e.g., depending on how the receiver filters signals in other frequency regions, such as in an adjacent channel.
  • the communication node 100 may also consider the expected transmit power of the first signal by the first transceiver 1 1 1 , the feeder loss between the first transceiver 1 1 1 and antenna Ax, and the transmit filter characteristics of the first transceiver 1 1 1 on adjacent channel leakage.
  • the experienced interference for the second transceiver 112 caused by the first transceiver 1 11 might be measured.
  • One example of such a measurement would be that the receiver in the second transceiver 112 detects the signal power that is received when the first transceiver 1 1 1 is transmitting.
  • Such a measurement might be performed when the second transceiver 112 is anyway receiving or it might, preferably, be done when there is no other signal sent in the system corresponding to the second transceiver 1 12.
  • the communication node 100 may determine the interference by obtaining information about the interference between the signal associated with the first transceiver 1 and the at (east the signal associated with the second transceiver 1 12. In these embodiments, the communication node 100 may determine the
  • interference e.g., by referring to a lookup table of interference relationships, based on a priori available information, e.g., known mathematical interference relationships, pre- simulated or measured relationships stored in a table, learned relationships from previous use, which are stored in a table, etc...
  • the relationships described above may be determined for a number of combinations of the signal/s of the first transceiver 11 1 and the signal/s of the second transceiver 1 12, and what antennas are used by the first transceiver 1 1 1 and the second transceiver 1 12, and stored in a table or expressed in a functional relationship.
  • the interference estimate can then be derived from the functional relationship or table look-up.
  • the first transceiver 1 1 1 may exchange information with the second transceiver 1 12 about what frequencies are being used for the communication of signals, and possibly also what transmit powers are used. This information can be exchanged via a specific interface between the two transceivers, or via a node configuration entity which is connected to both transceivers.
  • the interference may be determined by methods other than those described here, but that will be known to those of skill in the art.
  • the communication node 100 may manage the interference once it has already begun, or it may try to prevent it before it occurs. Therefore, in the embodiments in which the communication node 00 may try to prevent the interference from happening, it may carry out the determining the interference action in one moment which is before the interference between the signal associated with the first transceiver 1 11 and at least the signal associated with the second transceiver 1 12 takes place. In some of these embodiments, communication node 100 may estimate or obtain the interference on a regular basis, to prevent the interference from happening.
  • the communication node 100 may try to manage the interference once it has already begun, it may carry out the determining the interference action in one moment which is after the interference between the signal associated with the first transceiver 111 and at least the signal associated with the second transceiver 1 12 takes place.
  • communication node 100 may estimate or obtain the interference when a change in the communication links of the communication node takes place, such as a change in the intensity of a received signal or a change in carrier frequency or radio technology that is used.
  • the communication node 100 may not need to take further action, in some of other of these embodiments, the communication node 100 may repeat the
  • determination step to continue to monitor the interference. This may happen for example after a determined period of time has passed, or after a change in a transceiver configuration, e.g., change of frequency carrier or radio access technology, is detected, which may result in a change in the determined interference.
  • a transceiver configuration e.g., change of frequency carrier or radio access technology
  • the first transceiver 1 1 1 may be associated with a first SIM
  • the second transceiver 112 may be associated with a second S!M.
  • the first transceiver 111 may be associated with a first SIM profile and the second transceiver 112 may be associated with a second SIM profile.
  • a SIM profile may provide each of the transceivers with information about at least one of: what networks the transceiver is entitled to establish a communication connection with, what radio access technologies are allowed, e.g., one or more of GSM, WCDMA, LTE, WiFi, and what frequency carriers the device is allowed.
  • the determining an interference action may be derived from signals which are permitted by the first and second SIM profiles. For example, coupling interference may be determined based on what frequency carriers are entitled to be used by the first transceiver and the relationship of those carriers with respect of the frequency carriers that are being used or entitled to be used by the second transceiver. Action 202
  • the communication node 100 may determine the interference by comparing an interference value with a previously set interference threshold.
  • This interference threshold may determine the interference value above which the quality of the communication signals received and/or transmitted through the communication node 100 is suboptimal according to a certain communication standard, e.g., it may not achieve a desired signal-to-noise- and-interference ratio.
  • the determined interference may be an absolute interference value that may need to be compared to a threshold, in order for the communication node 100 to determine if further action is required, or not, to manage the interference between the first transceiver 1 1 and at least the second transceiver 12.
  • the communication node 100 may need to take the action of establishing that the determined interference exceeds the interference threshold. This action is optional.
  • the outcome of this action may be that the interference threshold has been exceeded or not. If the interference threshold has not been exceeded, the communication node 100 may, in some embodiments, not take further action, as described earlier, in other embodiments, the communication node 100 may repeat the determining action again, as explained above, in the embodiments in which the interference threshold has been exceeded, the communication node 100 may carry out the following further actions.
  • Action 203
  • the interference exceeds the threshold
  • the communication node 100 may try to manage the potential or ongoing interference in order to provide a communication of optimal quality, in some embodiments, the communication node 100 may do this by assigning different antennas of the antenna set 120 to the first transceiver 1 11 for the purposes of transmission, and different antennas of the antenna set 120 to the second transceiver 1 12 for the purposes of data reception, in such a way that the interference is avoided altogether, or at least reduced. In some embodiments, the communication node may assign the same antennas of the antenna set 120 to the first transceiver 1 1 1 and to the second transceiver 1 12 for the purposes of transmission only.
  • the communication node may not assign the same antennas of the antenna set 120 to the first transceiver 1 1 and to the second transceiver 1 12 for the purposes of transmission. That is, the transmitting parts of the transceivers may be connected to the same antennas, but the antenna/s connected to the receiver of one transmitter must be different from the antenna/s used by the transmitter of the other transceiver, by at least one antenna.
  • the communication node 100 configures a first connection between a transmitting part of the first transceiver 111 and one or more first antennas of the antenna set 120 and configures a second connection between a receiving part of the second transceiver 1 12 and one or more second antennas of the antenna set 120, so that at least one antenna is different between the one or more first antennas and the one or more second antennas.
  • This is achieved by configuring that the transmit signal output of the first transceiver 111 may be connected to said one or more first antennas and by configuring that the receipt signal input of the second transceiver 112 may be connected to said one or more second antennas, in some embodiments, this may be done by configuring the switching system 160 to carry out this configuration action.
  • the first transceiver 1 1 and the second transceiver 112 may be arranged to be connected to all antennas of an antenna set 120 having four antennas, that is, antennas 1 , 2, 3 and 4.
  • the communication node 100 may configure the transmitting part of the first transceiver 1 1 1 to be connected to antennas 1 , 2 and 3, and configure the receiving part of the second transceiver 112 to be connected to antennas 1 , 2 and 4, i.e., one antenna is different between the antennas the transmitting part of the first transceiver 1 11 is configured to be connected to and the antennas the receiving part of the second transceiver 1 12 is configured to be connected to.
  • communication node 100 may configure the transmitting part of the first transceiver 1 1 1 to be connected to antennas 1 , 2, 3 and 4, and configure the receiving part of the second transceiver 1 12 to be connected to antennas 1 , 2 and 3.
  • the communication node 00 may configure the transmitting part of the first transceiver 1 1 1 to be connected to antennas 1 and 2, and configure the receiving part of the second transceiver 1 12 to be connected to antennas 3 and 4, i.e., all antennas are different between the antennas the transmitting part of the first transceiver 1 11 is configured to be connected to and the antennas the receiving part of the second transceiver 1 12 is configured to be connected to.
  • the first transceiver 11 1 and the second transceiver 1 12 may continue to be physically coupled to all the antennas of the antenna set 120 for transmission purposes, while the connection may be effectuated by configuring the transceivers to disconnect from a selected group of antennas from the antenna set 120 for reception purposes. That is, the antenna/s used by a transceiver for transmission purposes can be different from the antenna/s used by the same transceiver for reception purposes. For the sake of simplicity only a few examples have been provided here, but they are not meant to be limiting in scope.
  • the switching system 160 may perform the configuring the first connection between the transmitting part of the first transceiver 1 11 and the one or more first antennas of the antenna set 120, and the configuring the second connection between the receiving part of the second transceiver 1 12 and the one or more second antennas of the antenna set 120.
  • Each transceiver may be limited in the number of antennas that it may be configured to be connected to, which may be smaller than the entire antenna set 120. Then a selection is made for the purposes of configuring the connections. For the selection of antennas, in general, antennas are preferred which have a good radio channel to the further network nodes, such as network node 131 and network node 132. In addition, if a coupling interference is anticipated, antennas that are used for
  • the transmission of the first transceiver 1 11 should not be identical to the antennas used for the reception of the second transceiver 12. More generally, the first transceiver 1 1 1 transmit antenna/s should have a small coupling gain to the second transceiver 1 12 receiver antenna/s.
  • the more the antennas are coupled i.e., the higher the coupling gain between the antennas, the more they can lead to interference.
  • the transmission antenna for a signal of the first transceiver 11 1 is strongly coupled to an antenna 1 and weakly to an antenna 2, the interference caused when connecting antenna 2 to the receiver of the second transceiver 1 2 may be Sower in comparison to what it would be if antenna 1 were used.
  • the communication node 100 may base at least one of the configuring the first connection and the configuring the second connection on at least a coupling gain between the at least two antennas in the antenna set 120.
  • the first transceiver 1 1 1 may want to communicate with the first network node 131 , and it would prefer antennas for this communication which have a good path gain to the first network node 131 and avoid antennas with a low path gain. The same holds for the second transceiver 1 12 and the path gain of the antennas to the second network node 132.
  • the communication node 100 may base at least one of the configuring the first connection and the configuring the second connection on at least a path gain provided by the at least two antennas of the antenna set 120 to further network nodes.
  • communication node 100 may base at least one of the configuring the first connection and the configuring the second connection on both, a coupling gain between the at least two antennas in the antenna set 120 and a path gain provided by the at feast two antennas of the antenna set 120 to further network nodes.
  • the communication node 100 may: a) configure the first connection between the transmitting part of the first transceiver 1 1 1 and one or more first antennas of the antenna set 120 which have good path gain to the first network node 131 , b) configure the second connection between the receiving part of the second transceiver 1 12 and one or more second antennas of the antenna set 120 which good path gain to the second network node 132, and c) avoid antenna selections in a and b when the coupling between these antennas may be high and this may leads to high interference (assuming that the signal associated with the first transceiver 1 1 and the signal associated with the second transceiver 1 12 are, e.g., close in spectrum so that they may interfere.
  • the first transceiver 1 1 1 may be connected to a first wireless device 171 and the second transceiver 112 may be connected to a second wireless device 172.
  • the communication node 100 may need to take further actions in order to implement the configuration changes on antenna connectivity of the the first transceiver 1 1 1 and the second transceiver 1 12.
  • category and/or capability of at least one of the first transceiver 1 1 1 and the second transceiver 112 may need to be changed due to the antenna rearrangement carried out by the communication node 100.
  • a transceiver capability includes the number of antennas a transceiver uses, !f this is changed as a result of the action of communication node 100, at least one of the first transceiver 111 and the second transceiver 1 12 may need to change its capability and signal a different capability to the network. For example, in embodiments with an antenna system with 6 antennas connected to two transceivers, for example in a car.
  • each transceiver With a configuration that each transceiver is connected to a separate set with 2 antennas to avoid interference, transceivers have a 2-antenna capability. In other embodiments, each transceiver can simultaneously be connected to 4 antennas, wherein 2 antennas are used in common between the transceivers, and 1 antenna for the first antennas is different from at least one antenna out of the second antennas, so that the transceivers have a different multi- antenna capability.
  • a transceiver category is description of a transceiver capability which is used by, e.g., a cellular network to configure the communication channels and transmission modes that can be used for communication between the transceiver and the network.
  • the communication node 100 may change in at least one of the first transceiver 11 1 and second transceiver 1 12, at least one of: transceiver category and transceiver capability, in order to adapt to the antenna connectivity change. This action is optional.
  • the communication node 100 may then inform the network node which is in communication with the transceiver whose category or capability has been changed, of this change.
  • the communication node 100 may send a message comprising the changed at (east one of: transceiver category and transceiver capability to a network node out of the first network node 131 and the second network node 132, wherein the network node is arranged to be connected with the at least one of the first transceiver 1 1 1 and second transceiver 1 12 which has changed the at least one of: transceiver category and transceiver capability.
  • This action is optional.
  • the communication node 100 may further try to avoid or attenuate the interference by performing further actions, such as selecting a different carrier and/or Radio Access Technology, RAT.
  • Each of the first and second transceivers 11 1 and 1 12 is connected to a network. Typically, multiple carrier options may exist to connect to this network.
  • a carrier is the portion of the radio frequency spectrum over which the transmission of signals takes place.
  • RAT radio access technology
  • LTE Long Term Evolution
  • GSM Global System for Mobile communications
  • WiFi Wireless Fidelity
  • WiMAX Wireless Fidelity
  • the operator that provides the further communication nodes e.g. base stations, may have UMTS/HSPA connectivity at 2 GHz.
  • the network controls which RAT/carrier is selected by the first and second transceivers 1 1 1 and 1 12, respectively - possibly combined also with end-user policies -.
  • the communication node 100 may change to another carrier/RAT, so that the coupling interference is further avoided or reduced.
  • the first transceiver 11 1 and second transceiver 1 12 in the communication node 100 may, e.g., indicate to a network a preference of certain carriers/RATs or the desire not to use certain carriers/RATs.
  • the base station or radio network controller or access point or access controller in the network such as any of the first network node 131 and the second network node 312, may then start Radio Resource Management, RRM, procedures so that the transceivers start measuring on other carriers/RATs and a handover procedure may be performed to a better suited carrier/RAT.
  • RRM Radio Resource Management
  • the first and second transceivers 111 and 1 12 may also modify the measurement report for the channel quality of the current carrier to be perceived worse.
  • the base station or radio network controller or access point or access controller in the network may then automatically trigger measurements on other carriers/RATs, which may lead to a re-selection of the
  • the communication node 100 may determine at least one of a set of carriers and a set of RATs that may be used by at least one of the first transceiver 1 1 1 and the second transceiver 112. And the communication node 100 my determine this by one of: a) capabilities of the at least one of the first transceiver 1 1 1 and the second transceiver 1 12, and b) accessibility of the at least one of the set of carriers and the set of RATs that is enabled by a SIM configuration the at least one of the first transceiver 1 1 1 and the second transceiver 1 12 is associated with. The determination may comprise identifying combinations of permitted
  • Action 206 is optional.
  • Action 207 is optional.
  • the communication node 100 may further configure at least one of the first transceiver 11 1 and the second transceiver 1 12 to select at least one of a carrier and a Radio Access Technology, RAT, among the set of carriers and the set of RATs, respectively.
  • This configuration comprises tuning the transceiver to the corresponding carrier and RAT and performing communication according to the procedures defined by the corresponding RAT.
  • the interference between the first transceiver 11 1 and at least the second transceiver 112 may be avoided or reduced.
  • Action 207 is optional.
  • the communication node 100 may comprise an arrangement, such as that depicted in the embodiment of Figure 3. As mentioned above, the communication node 100 comprises at least the first transceiver 111 and the second transceiver 1 2, wherein the first and second transceivers 1 1 1 , 1 12 are arranged to be connected to an antenna set 120 comprising at least two antennas.
  • the communication node 100 comprises a processing circuit such as a processing circuit 301 depicted in Figure 3, together with computer program code for performing the functions and actions of the embodiments herein, Processing circuit 301 may comprise one or more processors.
  • the program code mentioned above may also be provided as a computer program product, for instance in the form of a data carrier carrying computer program code for performing the embodiments herein when being loaded into the in the communication node 100.
  • a data carrier carrying computer program code for performing the embodiments herein when being loaded into the in the communication node 100.
  • One such carrier may be in the form of a CD ROM disc. It is however feasible with other data carriers such as a memory stick.
  • the computer program code may furthermore be provided as pure program code on a server and downloaded to the communication node 100.
  • processing circuit 301 may be located within with at least one of the first transceiver 111 or the second transceiver 1 12. In some embodiments in which processing circuit 301 comprises more than one processor, at least one of these processors configured to carry out some or all of the functions described be!ow may be located within at least one of the first transceiver 111 or the second transceiver 1 12. In other embodiments, processing circuit 301 or all the processors comprised therein carrying out the functions described below may be located separately from any of the transceivers of communication node 100.
  • the processing circuit 301 is configured to determine an interference between a signal associated with the first transceiver 111 and at least a signal associated with the second transceiver 112. In some embodiments, processing circuit 301 may carry out this determination by obtaining information, as described above, that it may receive through a receiving port 302.
  • the receiving port 302 may be a connected to one or more transceivers via some local bus or another physical connection.
  • the processing circuit 301 may store the determined interference in a memory circuit 303, which may be in communication with the processing circuit 301 and the receiving port 302.
  • the processing circuit 301 may be further configured to determine the interference between a signal associated with the first transceiver 11 1 and at least a signal associated with the second transceiver 1 12 in one moment out of: a) before the interference between the signal associated with the first transceiver 1 1 1 and at ieast the signal associated with the second transceiver 1 12 takes place, and b) after the interference between the signal associated with the first transceiver 1 1 1 and at Ieast the signal associated with the second transceiver 1 12 takes place.
  • the processing circuit 301 may be further configured to estimate the interference between the signal associated with the first transceiver 11 1 and at Ieast the signai associated with the second transceiver 112. As described earlier, once the interference has been estimated, the processing circuit 301 may store the estimated interference in the memory circuit 303.
  • the processing circuit 301 may be further configured to obtain information about the interference between the signal associated with the first transceiver 1 1 and the at Ieast the signal associated with the second transceiver 1 12.
  • the information obtained by the processing circuit 301 such as for example, lookup tables, may be stored in memory circuit 303.
  • the processing circuit 301 may store the determined interference in the memory circuit 303.
  • the processing circuit 301 may be further configured to establish that the determined interference exceeds the interference threshold.
  • the processing circuit 301 is further configured to configure a first connection between a transmitting part of the first transceiver 1 1 1 and one or more first antennas of the antenna set 20, and configure a second connection between a receiving part of the second transceiver 112 and one or more second antennas of the antenna set 120, when the interference exceeds a threshold, so that at least one antenna is different between the one or more first antennas and the one or more second antennas.
  • the processing circuit 301 may be further configured to base at least one of the configuring the first connection and the configuring the second connection on at least one of: a coupling gain between the at least two antennas in the antenna set 120, and a path gain provided by the at least two antennas of the antenna set 120 to further network nodes.
  • the communication node 100 may further comprise a switching system 304.
  • the first and second transceivers 1 1 1 , 112 may be arranged to be connected to the antenna set 120 via the switching system 304.
  • the processing circuit 301 comprises one or more processors, and at least one of the one or more processors is comprised in the switching system 304.
  • the switching system 304 comprises all the processors of processing circuit 301 . However, in other embodiments not depicted, maybe one or more, but not all, of the processors of processing circuit 301 may be comprised in the switching system 304.
  • the at least one of the one or more processors of processing circuit 301 comprised in the switching system 304 may be configured to configure the first connection between the transmitting part of the first transceiver 1 11 and the one or more first antennas of the antenna set 120, and to configure the second connection between the receiving part of the second transceiver 1 2 and the one or more second antennas of the antenna set 120.
  • the first transceiver 1 1 1 may be associated with a first SIM and the second transceiver 1 12 may be associated with a second SIM.
  • At least one of the first transceiver 1 11 and the second transceiver 1 12 may be associated with the first SIM and second SIM,
  • a remote-SIM-access connectivity that is established via a wireless technology
  • c) a dynamic re-configuration of a software-based SIM that is embedded in at least one of the first transceiver 11 1 and the second transceiver 1 12 and is reprogrammed with SIM credentials according to a software-based configuration procedure.
  • the first transceiver 1 11 may be associated with a first SIM profile and the second transceiver 112 is associated with a second SIM profile, and the processing circuit 301 is further configured to determine an interference by a derivation from signals which are permitted by the first and second SIM profiles.
  • the processing circuit 301 may be further configured to configure at least one of the first transceiver 11 1 and the second transceiver 1 12 to select at least one of a carrier and a RAT, among a set of carriers and a set of RATs, respectively.
  • the processing circuit 301 may be further configured to determine at least one of the set of carriers and the set of RATs by one of: a) capabilities of the at least one of the first transceiver 1 1 1 and the second transceiver 1 12, and b) accessibility of the at least one of the set of carriers and the set of RATs that is enabled by a SIM configuration the at least one of the first transceiver 11 1 and the second transceiver 1 12 is associated with.
  • the processing circuit may be located in a vehicle, and the antenna set is located on the outside of the vehicle.
  • the first transceiver 1 11 may be arranged to be connected to a first network node 131 and the second transceiver 1 12 may be arranged to connected to a second network node 32.
  • the processing circuit 301 may be further configured to change in at least one of the first transceiver 11 1 and second transceiver 112, at least one of: transceiver category and transceiver capability.
  • the processing circuit 301 may be further configured to send a message comprising the changed at least one of: transceiver category and transceiver capability to a network node out of the first network node 131 and the second network node 132, wherein the network node is arranged to be connected with the at least one of the first transceiver 1 1 1 and second transceiver 1 12 which has changed the at least one of: transceiver category and transceiver capability.
  • the processing circuit 301 may send this message through a sending port 305, either directly, or by first storing the message in the memory circuit 303.
  • the sending port 305 may be in communication with the processing circuit 301 , and the memory circuit 303.
  • Memory circuit 303 may comprise one or more memory units.
  • the memory circuit 303 is arranged to be used to store data such as the determined interference and interference lookup tables, and applications to perform the methods herein, when being executed by the processing circuit 301.
  • the multiple links involved in operation may operate over the same or different carriers.
  • the multiple links may also belong to different RATs i.e. multi-RAT operation involving LTE and CD A2000.
  • the multi-RAT operation may comprise any combination of LTE, CDMA2000 1x RTT, High Rate Packet Data (HRPD), UMTS Terrestrial Radio Access (UTRA) Frequency Division Duplexing (FDD), UTRA Time Division Duplexing (TDD), and GERAN where at least 2 RATs operate from non co- located radio network nodes or base stations.
  • the RATs or carriers may carry different or same services e.g. LTE carrier may carry data whereas
  • CDMA2000 may carry voice service.
  • 1xRTT is an operating mode of CDMA wireless technology.
  • Such operation involving multiple non co-located network nodes may also belong to multipoint transmission and/or reception arrangement. It is also interchangeably called as Distributed Antenna Systems (DAS) or Common Multipoint Transmission and/or reception (CoMP).
  • DAS Distributed Antenna Systems
  • CoMP Common Multipoint Transmission and/or reception
  • Such operation involving multiple sites may also belong to multi-carrier or carrier aggregation system.

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

Abstract

L'invention concerne une méthode dans un nœud de communication permettant de gérer l'interférence entre un premier émetteur-récepteur et au moins un deuxième émetteur-récepteur, le nœud de communication comprenant au moins le premier émetteur-récepteur et le deuxième émetteur-récepteur, les premier et deuxième émetteurs-récepteurs étant agencés pour être connectés à un ensemble antenne comprenant au moins deux antennes, la méthode consistant à : déterminer une interférence entre un signal associé au premier émetteur-récepteur et au moins un signal associé au deuxième émetteur-récepteur; lorsque les interférences dépassent un seuil, configurer une première connexion entre une partie de transmission du premier émetteur-récepteur et une ou plusieurs premières antennes de l'ensemble antenne, et configurer une deuxième connexion entre une partie de réception du deuxième émetteur-récepteur et une ou plusieurs deuxièmes antennes de l'ensemble antenne; de façon qu'au moins une antenne soit différente entre la ou les premières antennes et la ou les deuxièmes antennes.
PCT/SE2012/051081 2012-10-09 2012-10-09 Méthode et nœud de communication pour la gestion d'interférence WO2014058361A1 (fr)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150334575A1 (en) * 2014-05-16 2015-11-19 Qualcomm Incorporated Avoidance of Interference During Simultaneous Multi-Active Technologies in Global Mode

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Publication number Priority date Publication date Assignee Title
US20120252375A1 (en) * 2009-04-22 2012-10-04 Broadcom Corporation Method and System for Dynamic Selection of a Coexistence Method and Transmit Power Level Based on Calibration Data

Patent Citations (1)

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Publication number Priority date Publication date Assignee Title
US20120252375A1 (en) * 2009-04-22 2012-10-04 Broadcom Corporation Method and System for Dynamic Selection of a Coexistence Method and Transmit Power Level Based on Calibration Data

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150334575A1 (en) * 2014-05-16 2015-11-19 Qualcomm Incorporated Avoidance of Interference During Simultaneous Multi-Active Technologies in Global Mode
US9467865B2 (en) * 2014-05-16 2016-10-11 Qualcomm Incorporated Avoidance of interference during simultaneous multi-active technologies in global mode

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