WO2014163542A1 - Procédé et nœud de commande pour la transmission d'informations de commande à un équipement d'utilisateur - Google Patents

Procédé et nœud de commande pour la transmission d'informations de commande à un équipement d'utilisateur Download PDF

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Publication number
WO2014163542A1
WO2014163542A1 PCT/SE2013/050363 SE2013050363W WO2014163542A1 WO 2014163542 A1 WO2014163542 A1 WO 2014163542A1 SE 2013050363 W SE2013050363 W SE 2013050363W WO 2014163542 A1 WO2014163542 A1 WO 2014163542A1
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WIPO (PCT)
Prior art keywords
node
radio nodes
multiple radio
nodes
subset
Prior art date
Application number
PCT/SE2013/050363
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English (en)
Inventor
Sairamesh Nammi
Original Assignee
Telefonaktiebolaget L M 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 L M Ericsson (Publ) filed Critical Telefonaktiebolaget L M Ericsson (Publ)
Priority to PCT/SE2013/050363 priority Critical patent/WO2014163542A1/fr
Publication of WO2014163542A1 publication Critical patent/WO2014163542A1/fr

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Classifications

    • 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
    • H04B7/022—Site diversity; Macro-diversity
    • H04B7/024—Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/30—TPC using constraints in the total amount of available transmission power
    • H04W52/32—TPC of broadcast or control channels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/38—TPC being performed in particular situations
    • H04W52/40—TPC being performed in particular situations during macro-diversity or soft handoff
    • 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
    • H04W88/08—Access point devices
    • H04W88/085—Access point devices with remote components

Definitions

  • the present disclosure relates generally to a method and a controlling node of a cellular network for wireless communication, for controlling transmission of control information to a User Equipment, UE, wherein the UE communicates radio signals with multiple radio nodes serving a combined cell.
  • the term "User Equipment, UE” will be used to represent any user-controlled wireless terminal or device capable of radio communication including receiving downlink signals transmitted from a radio node of a wireless communication network.
  • radio node also commonly referred to as a base station, e-nodeB, eNB, etc., represents any node of a wireless communication network that can communicate uplink and downlink radio signals with UEs.
  • the radio nodes described here may include so-called macro nodes and low power nodes.
  • a heterogeneous cellular network may comprise hierarchically arranged nodes, including macro nodes transmitting with relatively high power and covering relatively large areas of a size in the order of kilometers, and low power nodes transmitting with relatively low power and covering areas of a size in the order of a few meters, e.g. micro, pico, femto and relay nodes, to mention some customary examples.
  • the low power nodes may be employed together with the macro nodes in an overlapping fashion to locally provide added capacity in so-called "hot spot" areas such that multiple small areas served by such micro/pico/femto/relay nodes may be located within the area served by a macro node.
  • the above-described heterogeneous network may be realized basically in two different ways, commonly referred to as:
  • nodes cover individual cells with different cell identities, which means that a UE is served by one radio node at a time and must undergo handover between the cells when necessary to maintain adequate radio coverage, and
  • the latter alternative of using a combined cell with multiple radio nodes has the advantage of eliminating the need for performing handover which reduces the amount of signaling and reduces the risk of dropped connection due to failed handover, among other things.
  • Uplink radio signals e.g. containing data
  • sent from the UE is received by all the radio nodes which are able to process the data jointly.
  • any downlink radio signals e.g. containing control information are sent from all radio nodes of the combined cell, meaning that considerable transmit power is consumed for such radio signals which results in a deficient power room left for other communications in the cell and in that interference is generated disturbing other communications, e.g. in neighboring cells.
  • FIG. 1 An example of such downlink control information is feedback sent from the radio nodes to indicate whether uplink data from the UE has been received and decoded by the radio nodes or not, which is illustrated in Fig. 1.
  • This feedback "F” is also referred to as ACK/NAK of a Hybrid Automatic Repeat Request, HARQ, process, where "ACK” acknowledges successful reception and decoding and "NAK” is effectively a request for retransmission of non-decoded data.
  • Further examples of such downlink control information include scheduling grant
  • a combined cell is served by a macro node 100 covering the whole cell and a plurality of low power nodes 102, 104, 106 and 108 each covering a small part of the whole cell.
  • a UE located somewhere in the combined cell may be connected to virtually all nodes 100-108 at the same time such that these nodes receive and process uplink radio signals comprising data "D" sent from the UE.
  • all nodes send the same control information, i.e. the feedback F, to the UE thus consuming a substantial part of the available power room in the cell which in turn reduces the cell's capacity for other communications in the combined cell.
  • a method is provided which is performed by a controlling node of a cellular network for wireless communication, to control transmission of control information to a User Equipment, UE, wherein the UE communicates radio signals with multiple radio nodes serving a combined cell in the cellular network.
  • the controlling node selects a subset of the multiple radio nodes and instructs the selected subset of the multiple radio nodes to send said control information to the UE.
  • a controlling node of a cellular network for wireless communication is provided.
  • the controlling node is configured to control transmission of control information to a UE that is configured to communicate radio signals with multiple radio nodes serving a combined cell in the cellular network.
  • the controlling node comprises a logic unit configured to select a subset of the multiple radio nodes, and an instructing unit configured to instruct the selected subset of the multiple radio nodes to send said control information to the UE.
  • Fig. 1 is a communication scenario illustrating how feedback is sent as control information to a UE from multiple radio nodes of a combined cell, according to the prior art.
  • FIG. 2 is a flow chart illustrating a procedure in a controlling node for controlling transmission of control information to a UE, according to some possible embodiments.
  • FIG. 3 is a communication scenario illustrating how transmission of control information to a UE is limited, according to further possible embodiments.
  • Fig. 4 is a block diagram illustrating a controlling node, according to further possible embodiments.
  • Fig. 5 is an exemplifying flow chart with actions by a controlling node for selecting a subset of radio nodes, according to further possible embodiments.
  • Fig. 6 is another exemplifying flow chart with actions by a controlling node for selecting a subset of radio nodes, according to further possible
  • a solution is provided to enable improved capacity in a combined cell and/or in one or more neighboring cells nearby or adjacent to the combined cell by reducing the number of radio nodes that transmit control information to a UE being served by virtually all radio nodes in the combined cell at the same time. Thereby, the power being consumed for transmitting the downlink control information is reduced and there will be more power room left for other radio transmissions in the cell. Further, the amount of potentially harmful interference caused by transmitting the downlink control information may be reduced which could also improve the capacity in the combined cell and/or in one or more neighboring cells located nearby the combined cell.
  • the term "combined cell” is used to represent a cell being served by multiple radio nodes at the same time such that they all may receive uplink radio signals transmitted from a UE in the cell, or at least those radio nodes that are close enough to the UE to detect the UE's transmitted radio signals.
  • the radio nodes of the combined cell may be arranged in an overlapping fashion of a heterogeneous cellular network for wireless communication as described above.
  • the radio nodes of the combined cell may comprise a macro node transmitting with relatively high power to basically cover the whole cell, and a set of low power nodes transmitting with relatively low power to cover a part of the combined cell that is smaller than the area covered by the macro node.
  • a procedure to control transmission of control information to a UE that communicates radio signals with multiple radio nodes serving a combined cell in a cellular network for wireless communication will now be described with reference to the flow chart in Fig. 2 comprising actions that are to be performed by a controlling node of the cellular network.
  • the cellular network may be based on Wideband Code Division Multiple Access, WCDMA, and/or High Speed Packet Access, HSPA.
  • WCDMA Wideband Code Division Multiple Access
  • HSPA High Speed Packet Access
  • the embodiments described in this disclosure are also applicable in a Long Term Evolution, LTE, based network employing soft cells.
  • the control information that is to be transmitted to the UE according to this procedure may, without limitation, comprise at least one of: feedback to indicate whether uplink data has been received and decoded by the multiple radio nodes or not, a power control command, and scheduling grant information for uplink data transmission. It should be noted that the embodiments described in this disclosure are in general applicable for any type of downlink control
  • the above-mentioned feedback may include an ACK/NAK of a HARQ process which may be sent over a downlink channel called "Enhanced Hybrid Indicator Channel E-HICH" which is sent to the UE to indicate successful or unsuccessful reception and decoding of uplink data sent from the UE over an uplink channel called "Enhanced Dedicated Physical Data Channel E-DPDCH”.
  • E-HICH Enhanced Hybrid Indicator Channel
  • the above-mentioned power control command is typically sent to instruct the UE to adjust its transmit power level, which command may be sent over a downlink channel called "Fractional Dedicated Physical Channel F-DPCH”.
  • the above-mentioned scheduling grant information for uplink data transmission is sent to instruct the UE which radio resource to use for its data transmissions, which information may be sent over a downlink channel called "Enhanced Relative Grant Channel E-RGCH”. Similar scheduling information may also be sent over a downlink channel called "Enhanced Absolute Grant Channel E-AGCH”.
  • the controlling node in the example of Fig. 2 is associated with the combined cell and may be arranged to operate exclusively for this cell or for a plurality of cells in the network.
  • the controlling node may be implemented in a macro node of the combined cell or in a more centralized network node, for example a Radio Network Controller "RNC" or similar, which is connected to the radio nodes of the combined cell and possibly also to radio nodes of other cells as well in the case when the controlling node is shared by several cells.
  • RNC Radio Network Controller
  • the controlling node is able to communicate with the radio nodes of the combined cell over a suitable interface, for example the so-called "X2 interface" which is commonly used for signaling between radio nodes in an LTE-based cellular network.
  • a first action 200 illustrates that a radio communication has been established with the UE such that the UE communicates radio signals with the multiple radio nodes of the combined cell. For example, any uplink data
  • this action mainly comprises activities in the radio nodes and the UE, including various signaling, for setting up a connection for the radio communication in a regular manner, while the controlling node as such does not take part in the actual establishment of the radio communication.
  • the controlling node may be implemented in an RNC which in turn may be involved in the establishment of the radio communication which is outside the scope of this solution. Nevertheless, the controlling node somehow becomes aware of the established radio communication with the UE, for example by receiving a suitable notification from one of the multiple radio nodes of the combined cell.
  • the controlling node selects a subset of the multiple radio nodes comprising one or more radio nodes that are assigned to send the downlink control information to the UE, meaning that the number of radio nodes in the selected subset is less than the total number "N" of the multiple radio nodes communicating radio signals with the UE.
  • the selected subset of radio nodes may comprise any number "n" of radio nodes less than the total number N, i.e. 1 ⁇ n > N.
  • the controlling node may select the subset of radio nodes in different ways which will be described in more detail later below.
  • the total number N above may include all radio nodes serving the combined cell or more likely only some of the radio nodes serving the combined cell, i.e. those able to communicate radio signals with the UE.
  • the UE may be located too far away from some low power radio nodes in the combined cell such that uplink signals from the UE cannot reach those radio nodes.
  • a final shown action 204 illustrates that the controlling node instructs the selected subset of the multiple radio nodes to send the control information to the UE, instead of letting all of the multiple radio nodes in radio communication with the UE send the same control information to the UE at the same time.
  • the power consumed for conveying the control information to the UE can be limited to be not more than necessary to get the control information across to the UE, thus minimizing the consumed power and the interference that it may potentially cause for other radio communications either within the same cell or in other nearby cells.
  • the consumed power will thus be reduced by having fewer radio nodes transmitting the control information instead of all of the multiple radio nodes.
  • the selected subset of radio nodes should also be located as close as possible to the UE such that this subset of multiple radio nodes can transmit with as low power as possible which further contributes to reducing the transmission power.
  • a possible embodiment is suggested where the subset of the multiple radio nodes is selected based on an indication of vicinity, i.e. closeness, of the UE to the respective radio nodes.
  • the term "vicinity" thus relates to the mutual distance between the UE and each respective radio node.
  • the controlling node may obtain the indication of vicinity for each of the multiple radio nodes of the combined cell in different ways.
  • the indication of vicinity may comprise signal quality of downlink signals received by the UE when transmitted by each respective radio node of the multiple radio nodes.
  • the signal quality may be indicated by at least one of the following quality-related parameters: Signal to Noise Ratio, SNR, Signal to Interference and Noise Ratio, SINR, Reference Signal Received Quality, RSRQ, and Channel Quality Indicator, CQI.
  • One or more of these parameters may be obtained from measurements made by the UE on a reference signal transmitted from the multiple radio nodes, for example in a specific measurement process, or "probing period", when the multiple radio nodes of the combined cell may take turns to transmit the reference signal one at a time thus enabling the UE to measure the received reference signal, as received from each respective radio node, for determination of any of the above quality-related parameters.
  • the above reference signal may also be called a "pilot signal” which is a common term in the field of radio communication for signals specifically intended for measurements.
  • the indication of vicinity may comprise path loss between the UE and each respective radio node of the multiple radio nodes, which path loss may be calculated from the transmit power used by the UE, which is known to the radio nodes, and a received signal strength of uplink signal transmissions from the UE which can be measured at the respective radio nodes.
  • selecting the subset of the multiple radio nodes may comprise selecting a single radio node from the multiple radio nodes.
  • the selected single radio node is thus instructed alone to send the control information to the UE, whereby unnecessary transmissions from further radio nodes in the cell may be avoided provided that the UE is able to receive and decode the control information from the single radio node.
  • the controlling node may further instruct the selected single radio node to transmit a node-specific pilot, which is a known signal that can be used by the UE as an aid for decoding the control information, thus enabling the UE to detect and read the control information transmitted from the single radio node.
  • the UE may estimate the channel for transmissions from the selected single radio node, and the estimated channel can be used to correctly decode control information transmitted from the single radio node.
  • Fig. 3 illustrates an example of communication scenario where the above-described solution is used to control transmission of control information "C" to a UE in a combined cell wherein the UE communicates radio signals with multiple radio nodes.
  • the multiple radio nodes include a macro node 300 covering the whole cell and a plurality of low power nodes 302, 304, 306 and 308 each covering a small part of the whole cell. The UE is located
  • the combined cell may comprise further radio nodes, not shown, which are not in communication with the UE and therefore not included in the term "multiple radio nodes" as used in this context.
  • a controlling node 310 is also involved which may be implemented in the macro node 300 or in another network node, for example a more centralized node such as an RNC or similar.
  • the controlling node 310 selects a subset of the multiple radio nodes 300-308, in this case radio nodes 302 and 306, which are instructed, as indicated by ⁇ " in the figure, to transmit the control information C to the UE.
  • the radio nodes 302 and 306 have been selected because they are the radio nodes closest to the UE while the other radio nodes 300, 304 and 308 are farther away from the UE and would therefore require higher transmit power for the transmission of the control information C than the radio nodes 302 and 306.
  • FIG. 4 A detailed but non-limiting example of how a controlling node may be structured with some possible functional units to bring about the above-described operation of the controlling node, is illustrated by the block diagram in Fig. 4.
  • the controlling node 400 is comprised in a cellular network for wireless communication and is configured to control transmission of control information to a UE that is configured to communicate radio signals with multiple radio nodes 402 serving a combined cell.
  • the controlling node 400 may be similar to the controlling node 310 in Fig. 3.
  • the controlling node 400 comprises a logic unit 400a configured to select a subset of the multiple radio nodes, e.g. in the manner described for action 202 above.
  • the subset of the multiple radio nodes may be selected based on an indication of vicinity to the UE which may comprise a signal quality and/or path loss determined for each radio node of the multiple radio nodes, as described above.
  • the controlling node 400 also comprises an instructing unit 400b configured to instruct the selected subset of the multiple radio nodes to send the control information to the UE, e.g. in the manner described for action 204 above.
  • Fig. 4 illustrates various functional units in the controlling node 400 and the skilled person is able to implement these functional units in practice using suitable software and hardware.
  • the solution is generally not limited to the shown structures of the controlling node 400, and the functional units 400a-b may be configured to operate according to any of the features described in this disclosure, where appropriate.
  • the functional units 400a-b described above may be implemented in the controlling node 400 by means of program modules of a respective computer program comprising code means which, when run by a processor "P" causes the controlling node 400 to perform the above-described actions and procedures.
  • the processor P may comprise a single Central Processing Unit (CPU), or could comprise two or more processing units.
  • the processor P may include a general purpose microprocessor, an instruction set processor and/or related chips sets and/or a special purpose microprocessor such as an Application Specific Integrated Circuit (ASIC).
  • ASIC Application Specific Integrated Circuit
  • the processor P may also comprise a storage for caching purposes.
  • Each computer program may be carried by a computer program product in the controlling node 400 in the form of a memory "M" having a computer readable medium and being connected to the processor P.
  • the computer program product or memory M thus comprises a computer readable medium on which the computer program is stored e.g. in the form of computer program modules "m".
  • the memory M may be a flash memory, a Random-Access Memory (RAM), a Read-Only Memory (ROM) or an Electrically Erasable Programmable ROM (EEPROM), and the program modules m could in alternative embodiments be distributed on different computer program products in the form of memories within the controlling node 400.
  • the above controlling node 400 and its functional units 400a-b may be configured or adapted to operate according to various optional embodiments.
  • the logic unit 400a could be configured to select the subset of the multiple radio nodes based on an indication of vicinity of the UE to each respective radio node of the multiple radio nodes.
  • one or more radio nodes may be selected which are relatively close to the UE such that the selected radio node(s) can transmit the control information with relatively low power and still reach the UE properly.
  • the indication of vicinity may comprise signal quality of downlink signals received by the UE when transmitted by each respective radio node of the multiple radio nodes.
  • the signal quality may be indicated by at least one of the quality-related parameters SNR, SINR, RSRQ, and CQI.
  • the logic unit 400a may be configured to select the subset of the multiple radio nodes by selecting one or more radio nodes for which the signal quality of downlink signals received by the UE is above a first threshold.
  • the logic unit 400a may be configured to obtain the signal quality of downlink signals received by the UE when transmitted by each respective radio node of the multiple radio nodes, from measurements made by the UE on a reference signal transmitted in turn by each respective one of the multiple radio nodes. Advantages of these embodiments include that the signal quality is a fairly reliable indication of vicinity and can easily be determined from measurements on downlink signals which the UE is able to perform.
  • the indication of vicinity may comprise path loss between the UE and each respective radio node of the multiple radio nodes.
  • the logic unit 400a may be configured to select the subset of the multiple radio nodes by selecting one or more radio nodes for which the path loss relative to the UE is below a second threshold.
  • Advantages of the latter embodiments include that the path loss is likewise a fairly reliable indication of vicinity and can easily be determined from measurements on uplink signals from the UE which the respective radio nodes are able to perform. It is also possible to select the subset of the multiple radio nodes based on both signal quality and path loss, as follows. It is e.g.
  • both of the above-mentioned first and second thresholds are evaluated in terms of the signal quality and path loss, respectively, for each radio node of the multiple radio nodes. For example, a particular radio node may be selected only if both thresholds are satisfied for that radio node, or if at least one of the first and second thresholds are satisfied for that radio node.
  • the logic unit 400a may be configured to select the subset of the multiple radio nodes by selecting a single radio node from the multiple radio nodes, e.g. by evaluating one or both of the above- mentioned first and/or second thresholds in terms of the signal quality and/or path loss, respectively, for each radio node of the multiple radio nodes.
  • a predetermined "default" radio node, or a randomly picked radio node, of the multiple radio nodes may be included in the subset of the multiple radio nodes.
  • the instructing unit 400b may be configured to instruct the selected single radio node to transmit a node-specific pilot enabling the UE to detect the control information transmitted from the single radio node, as described above.
  • control information may comprise at least one of: feedback, e.g. according to a HARQ process, to indicate whether data transmitted by the UE has been received and decoded by the multiple radio nodes or not, a power control command, and scheduling grant information for uplink data transmission.
  • feedback e.g. according to a HARQ process
  • the multiple radio nodes of the combined cell comprise a macro node transmitting with a relatively high power, such as node 300 in Fig. 3, and a set of low power nodes transmitting with a relatively low power, such as nodes 302-308 in Fig. 3, the controlling node 400 may be configured to be implemented in the macro node.
  • the subset of radio nodes may be selected by evaluating a threshold condition for each one of the multiple radio nodes.
  • a threshold condition is used that is related to signal quality which may be determined from measurements made by the UE of received downlink signals as follows. The signal quality may be used as an indication of the above-described vicinity, or distance, of the UE to each respective radio node.
  • the controlling node obtains a received signal quality of a pilot signal, or reference signal, that is received by the UE from one of the multiple radio nodes.
  • the received signal quality of the received pilot or reference signal may be indicated by at least one of the quality-related parameters SNR, SINR, RSRQ, and CQI. It is then determined whether the obtained signal quality of the considered radio node is above a first threshold, in an action 502.
  • the first threshold may have been set to ensure that downlink signals from the considered radio node will be good enough to enable correct reception and decoding of the control information sent from the considered radio node when the signal quality is above the first threshold. If so, the considered radio node is selected to be included in the subset of radio nodes, in an action 504, thus qualifying for the transmission of the control information.
  • the controlling node returns to action 500 for evaluating a next radio node among the multiple radio nodes in communication with the UE.
  • the procedure of Fig. 5 may be repeated for all of the multiple radio nodes in communication with the UE, or until a sufficient amount of radio nodes have been selected for inclusion in the subset of radio nodes.
  • a threshold condition is used that is related to path loss which may be determined from measurements made by each respective radio node of received uplink signals as follows.
  • the path loss may be used as an indication of the above-described vicinity, or distance, of the UE to each respective radio node where a low path loss implies a relatively short distance and a high path loss implies a relatively long distance.
  • the controlling node obtains the path loss between the UE and one of the multiple radio nodes.
  • the path loss of the considered radio node may be calculated from the transmit power used by the UE, which is known to the radio node, and a received signal strength of uplink signal transmissions from the UE which can be measured at the considered radio node. It is then determined whether the obtained path loss of the considered radio node is below a second threshold, in an action 602.
  • the second threshold may have been set to ensure that downlink signals from the considered radio node will be good enough to enable correct reception and decoding of the control information sent from the considered radio node when the path loss is below the second threshold. If so, the considered radio node is selected to be included in the subset of radio nodes, in an action 604, thus qualifying for the transmission of the control information.
  • the controlling node returns to action 600 for evaluating a next radio node among the multiple radio nodes in
  • the procedure of Fig. 6 may be repeated for all of the multiple radio nodes in communication with the UE, or until a sufficient amount of radio nodes have been selected for inclusion in the subset of radio nodes.

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

Abstract

L'invention concerne un procédé et un nœud de commande (310) d'un réseau cellulaire destiné à la communication sans fil, servant à commander la transmission d'informations de commande (C) à un équipement d'utilisateur (UE). L'UE échange des signaux radio (D) avec des nœuds radio multiples (300 à 308) desservant une cellule combinée du réseau cellulaire. Dans ce procédé, le nœud de commande sélectionne un sous-ensemble (302, 306) des nœuds radio multiples et donne l'instruction (I) au sous-ensemble sélectionné des nœuds radio multiples d'envoyer lesdites informations de commande à l'UE. De cette manière, la quantité d'énergie utilisée pour envoyer des signaux de liaison descendante à l'UE diminue, ce qui permet d'améliorer la capacité et l'efficacité d'utilisation des ressources dans la cellule combinée.
PCT/SE2013/050363 2013-04-02 2013-04-02 Procédé et nœud de commande pour la transmission d'informations de commande à un équipement d'utilisateur WO2014163542A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/SE2013/050363 WO2014163542A1 (fr) 2013-04-02 2013-04-02 Procédé et nœud de commande pour la transmission d'informations de commande à un équipement d'utilisateur

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Application Number Priority Date Filing Date Title
PCT/SE2013/050363 WO2014163542A1 (fr) 2013-04-02 2013-04-02 Procédé et nœud de commande pour la transmission d'informations de commande à un équipement d'utilisateur

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7006828B1 (en) * 2001-02-12 2006-02-28 Via Telecom Co. Ltd. Method and apparatus for performing cell selection handoffs in a wireless communication system
US7010322B2 (en) * 2001-10-29 2006-03-07 Samsung Electronics Co., Ltd. Apparatus and method for controlling power of a forward common power control channel in a mobile communication system
EP1802161A1 (fr) * 2005-03-28 2007-06-27 Mitsubishi Denki Kabushiki Kaisha Systeme de communication d objet mobile, procede de commande de transfert intercellulaire, appareil de commande de stations de base et terminal mobile

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7006828B1 (en) * 2001-02-12 2006-02-28 Via Telecom Co. Ltd. Method and apparatus for performing cell selection handoffs in a wireless communication system
US7010322B2 (en) * 2001-10-29 2006-03-07 Samsung Electronics Co., Ltd. Apparatus and method for controlling power of a forward common power control channel in a mobile communication system
EP1802161A1 (fr) * 2005-03-28 2007-06-27 Mitsubishi Denki Kabushiki Kaisha Systeme de communication d objet mobile, procede de commande de transfert intercellulaire, appareil de commande de stations de base et terminal mobile

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