WO2015167370A1 - Appareil de commande et son procédé de commande - Google Patents

Appareil de commande et son procédé de commande Download PDF

Info

Publication number
WO2015167370A1
WO2015167370A1 PCT/SE2014/050514 SE2014050514W WO2015167370A1 WO 2015167370 A1 WO2015167370 A1 WO 2015167370A1 SE 2014050514 W SE2014050514 W SE 2014050514W WO 2015167370 A1 WO2015167370 A1 WO 2015167370A1
Authority
WO
WIPO (PCT)
Prior art keywords
measurement
user equipment
active set
message
particular cell
Prior art date
Application number
PCT/SE2014/050514
Other languages
English (en)
Inventor
Abin JOSE
Reman KRISHNAN
Kannan SURESH KUMAR
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/SE2014/050514 priority Critical patent/WO2015167370A1/fr
Publication of WO2015167370A1 publication Critical patent/WO2015167370A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/16—Performing reselection for specific purposes
    • H04W36/22—Performing reselection for specific purposes for handling the traffic

Definitions

  • the present invention generally relates to a control apparatus operable to transmit measurement control messages to a user equipment, and a method of controlling the same.
  • a soft handover (SHO) is a function used in
  • a user equipment In an SHO, a user equipment (UE) is simultaneously connected to at least two radio links (RL) established with cells of radio base stations (RBS) .
  • RBS radio base stations
  • a softer handover is a special case of an SHO in which the cells that provide the RLs are controlled by the same radio base station.
  • the handover procedure includes a measurement phase, a decision phase, and an execution phase.
  • the UE performs a signal measurement of a common pilot channel (CPICH) of a candidate cell, by measuring a characteristic, such as signal power, of the received signal.
  • the UE confirms that the signal measurement satisfies criteria received from the RBS, and reports that the criteria is fulfilled to the RBS in accordance with a radio resource control (RRC) protocol.
  • RRC radio resource control
  • a network control apparatus for example, a radio network controller (RNC)
  • RRC radio network controller
  • RRC radio network controller
  • the UE is able to simultaneously receive and combine signals from the multiple RLs in an SHO situation with a rake receiver. Received signal levels coming from different RLs having the same data are added, resulting in a stronger signal. This is known as micro-diversity combining.
  • the UE In the uplink (UL) direction, the UE appends measured quality information to transmissions sent over the different RLs in the SHO.
  • a network control apparatus such as a radio network controller (RNC) may select the best UL signal based on the quality information. This is known as macro- diversity combining.
  • a UE involved in an SHO uses several radio links, more downlink (DL) channelization codes, and more DL power, for example, Because networks are increasingly under pressure in terms of capacity, there is a need for solutions that mitigate adverse effects of SHOs on resource availability while maintaining the benefits of SHOs.
  • DL downlink
  • the present invention was conceived in view of the above circumstances, and it is an object thereof to provide a technique of mitigating the reduction of system resource availability due to soft handovers while maintaining benefits of soft handovers.
  • a first measurement control message which is a message for controlling a first signal measurement
  • a user equipment operable to communicate simultaneously over a plurality of radio links towards cells in a soft handover in a CDMA-based communications system.
  • the user equipment is
  • a first measurement report message configured to perform the first signal measurement, by measuring a characteristic of a received signal, for a particular cell, and control whether to transmit a first measurement report message, which includes information corresponding to the first signal
  • the control apparatus has a first determination unit configured to determine whether a strength of an active set of the user equipment satisfies a predetermined condition.
  • the active set is a set of cells in the CDMA-based
  • the control apparatus also has a second determination unit configured to determine a soft handover load for the particular cell in the CDMA-based communications system.
  • the soft handover load indicates a degree to which radio links of the particular cell are used for soft handovers.
  • the control apparatus also has a generation unit configured to generate the first measurement control message in accordance with the strength of the active set being determined by the first determination unit to satisfy the predetermined condition and the soft handover load for the particular cell determined by the second determination unit.
  • the control apparatus also has a communication unit configured to transmit the first measurement control message, generated by the
  • the user equipment is configured to perform the first signal measurement, by measuring a characteristic of a received signal, for a particular cell, and control whether to transmit a first measurement report message, which includes information corresponding to the first signal measurement, to the control apparatus in
  • the method has a first determination step of determining whether a strength of an active set of the user equipment
  • the method also has a second determination step of determining a soft handover load for the
  • the soft handover load indicating a degree to which radio links of the particular cell are used for soft handovers.
  • the method also has a generation step of generating the first measurement control message in accordance with the strength of the active set being determined in the first determination step to satisfy the predetermined condition and the soft handover load for the particular cell determined in the second ⁇ determination step.
  • the method also has a
  • Fig. 1 is an overall view illustrating a user equipment (UE) in a soft handover (SHO) situation in a CDMA-based communications system according to some embodiments .
  • UE user equipment
  • SHO soft handover
  • Fig. 2 is a graph for explaining a
  • Fig. 3 is a graph for explaining conditions indicated by another measurement control message
  • Fig. 4 is a functional block diagram of the control apparatus according to some embodiments.
  • Fig. 5 is a flowchart for illustrating processing performed by the control apparatus for mitigation of resource availability loss due to SHOs according to some embodiments.
  • Fig. 6 is a flowchart for illustrating processing performed by the control apparatus for mitigation of resource availability loss due to SHOs according to some embodiments.
  • Fig. 1 is an overall view illustrating a user equipment (UE) 101 in an soft handover (SHO) situation in a CDMA-based communications system
  • the UE 101 is
  • RNC radio network controller
  • RBS radio base stations
  • RBS radio base stations
  • RBS 103 and 104 communicating with the RNC 102.
  • the control apparatus may be an RBS or a combination of RBSs and RNCs, for example.
  • An RBS 105 is also connected communicably to the RNC 102, but there is no RL currently established between the RBS 105 and the UE 101. It should be understood that in an actual implementation, there may be more UEs, RBSs and RNCs comprised in the system.
  • the RNC 102 is operable to generate, and transmit to the UE 101 via the RBSs 103 and 104, measurement control messages in accordance with
  • These measurement control messages are for controlling one or more signal measurements for a particular cell by the UE 101, and they contain
  • this information may include a list of information about cells in the system for which to perform measurements, information indicating a kind of signal measurement to perform, and condition information such as criteria for event-based or periodic measurement reporting.
  • a measurement control message may include other information, or may be broken up into a number of separate messages from the RNC 102 to the UE 101.
  • the list of information about cells may include information about cells to which the UE 101 is connected with RLs in an SHO situation, such as the cells of RBS 103 and RBS 104.
  • the set of cells to which the UE 101 simultaneously connects in an SHO situation is referred to as an "active set" of the UE 101.
  • the RNC 102 may instruct the UE 101 and relevant RBSs to update (add, remove, modify RLs) the active set of the UE 101 based on a measurement report message, which includes information corresponding to a signal measurement, from the UE 101, conditions of the system, or the like.
  • the list of information about cells may include information about cells with which the UE 101 does not have an RL established, such as the cell of RBS 105 in the example. Such cells are
  • monitoring cells referred to as “monitored cells”, and the set of
  • monitored cells is referred to as a "monitored set”.
  • Monitored cells are candidates for the active set.
  • the list of information about the cells may also include frequency related information, and non-frequency
  • the condition information may include trigger conditions for various events based upon which the UE 101 will transmit a measurement report message to the RNC 102. These events may include a pilot channel of an active set candidate cell entering a reporting range, a pilot channel of a cell in the active set leaving a reporting range, or a pilot
  • information may indicate periodic measurement reporting.
  • Information indicating a kind of signal measurement that the UE 101 should perform may include, for example, information indicating signal measurement for a pilot channel such as information indicating measurement for Common Pilot CHannel (CPICH) Energy per chip over Noise (Ec/No) , CPICH Received Signal Code Power (RSCP) , pathloss, or Universal Mobile
  • CPICH Common Pilot CHannel
  • Ec/No CPICH Energy per chip over Noise
  • RSCP CPICH Received Signal Code Power
  • pathloss or Universal Mobile
  • UMTS Terrestrial Radio Access
  • UTRA Terrestrial Radio Access
  • RSSI SSSI indicator
  • the UE 101 will perform one or more signal measurements for cells.
  • the condition is
  • the UE 101 will generate, and transmit to the RNC 102 via the RBSs 103 and 104, a measurement report message .
  • the cell index offset information may be used in the condition used to trigger the UE 101 to transmit the measurement report message.
  • the value of the cell index offset may cause the event to be more or less likely to be triggered, and thus cause the UE 101 to be more or less likely to transmit a corresponding measurement report message. This is explained in more detail, with reference to Fig. 2.
  • Fig. 2 is a graph for explaining a
  • Equation 1 the condition corresponds to Equation 1 below. Note that in other embodiments the condition may differ.
  • Equation 1 the equations explained here are simplified for ease of explanation, and in other
  • logarithm functions may be applied to the signal measurements, or elements may be multiplied by constants, for example.
  • Mnew corresponds to a value for a signal measurement performed by the UE 101 for the RBS 105, which corresponds to a monitored cell of the UE 101.
  • Mi to M NA correspond to the signal
  • NA is the number of cells not forbidden to affect the reporting range of the active set.
  • MBest corresponds to the signal measurement of the cell in the active set with the strongest signal measurement. Note that all of the signal measurements in this example are for CPICH Ec/No, but, as explained previously, in other embodiments other types of signal measurement are used.
  • R corresponds to a reporting range within which the candidate cell must enter for the UE 101 to be triggered to transmit a measurement report.
  • H is a hysteresis value.
  • W which is a weighting factor, is set to 0. Therefore, in the explanation, the Equation 1 simplifies to
  • ClOnew corresponds to the cell index offset for the monitored cell (active set candidate cell) as describe above. As can be seen from Equations 1 and 2, the user equipment will be less likely to transmit the measurement report message triggered by this condition if the value of this offset is set to be lower.
  • the RNC 102 makes less likely (discourage) the UE 101 being triggered by the condition to send a measurement report message by setting the cell index offset appropriately. This has the effect of making less likely an addition of a new RL from the UE 101 to the candidate cell, in the case of event la.
  • Equations 1 and 2) in the corresponding measurement control message from the RNC 102 to the UE 101 are corresponding measurement control message from the RNC 102 to the UE 101.
  • Time 201 is the point in time at which the condition is satisfied, and the UE 101 is triggered to send the corresponding measurement report message .
  • the measurement control message may indicate a condition for an event lb.
  • Event lb is an event that is triggered when a pilot channel of a cell in the active set leaves the reporting range.
  • a cell index offset may be set so as to make the event more likely to be triggered, for example.
  • a simplified version of the condition for event lb may be as follows.
  • Mold corresponds to a signal measurement of the active set cell leaving the reporting range
  • ClOold corresponds to the cell index offset for that cell.
  • setting ClOold to be lower makes the condition more likely to be satisfied. This may have the effect of making more likely a removal of an existing RL to a cell in the active set, i.e. of encouraging SHO RL deletion .
  • a time-to-trigger parameter may be used in determination of the measurement control message conditions described above in some embodiments.
  • the measurement report message is only transmitted to the control apparatus when the condition is satisfied over a duration indicated by the time-to- trigger parameter.
  • the RNC 102 is able to discourage SHO load for a particular cell by transmitting a measurement control message as described above for event la or event lb. This is because processing for SHO RL addition is performed in response to a measurement report message corresponding to event la, and
  • processing for SHO RL deletion is performed in response to a measurement report message corresponding to event lb.
  • the number of SHO RLs can be reduced and thus resource availability loss can be mitigated.
  • this technique of mitigating resource availability loss can be used while maintaining the benefits of SHOs according to embodiments .
  • Fig. 3 is a graph for explaining conditions indicated by another measurement control message transmitted from the control apparatus (RNC 102) to the UE 101 according to some embodiments.
  • the RNC 102 transmits such a measurement control message to the UE 101 to instruct the UE 101 to transmit a measurement report message when a signal measurement for an RBS in the active set of the UE 101 crosses a threshold indicating that the signal is strong enough to support a minimum
  • the RNC 102 can then use the information of the measurement report message to determine whether a strength of the active set of the UE 101 satisfies a predetermined condition, in SHO resource availability loss mitigation processing explained in detail with reference to Fig. 5.
  • the RNC 102 can determine that a signal measurement of at least one cell in the active set exceeds a predetermined
  • the RNC 102 can determine that no signal measurement of any cell in the active set exceeds the threshold, based on measurement report messages triggered by event If.
  • Time 301 is a point in time at which the
  • CPICH Ec/No signal measurement for RBS 103 exceeds a threshold indicated by a horizontal dashed line. Note that this threshold may be specified by the measurement control message. In the case of event le, the UE 101 is triggered to send a corresponding measurement report message at time 301.
  • time 302 is a point in time at which the CPICH Ec/No signal measurement for RBS 103 ceases to exceed the threshold.
  • the UE 101 is triggered to send a corresponding measurement report message at time 302.
  • the RNC 102 having received such a measurement report message can then use the information of the message to make a determination regarding the strength of the active set of the UE 101 from which the message is sent, as is explained later in detail with reference to Fig. 5.
  • Fig. 4 is a functional block diagram of the control apparatus according to some embodiments. Note again that for simplicity, explanation here will be given having the RNC 102 function as the control
  • control apparatus may encompass RNCs or RBSs or a combination of RNCS and RBSs, as described above .
  • the RNC 102 comprises a central processing unit (CPU) 401, a random access memory (RAM) 402, a read-only memory (ROM) 403, a communication unit 404, a first determination unit 405, a second determination unit 406, a third determination unit 407, and a
  • the communication unit 404 may include wired links, such as an Ethernet cable for example. It may include wireless links, via sending/receiving antennas for example. It is capable of communication with external devices such as the UE 101 over one or more networks.
  • the functionality of the units 405 through 408 is implemented by the CPU 401 executing a software program stored in the ROM 403 using the RAM 402 as a work area. In other embodiments, the units 404 through 408 are implemented using
  • the units 404 through 408 are implemented using a
  • Fig. 5 is a flowchart for illustrating processing performed by the control apparatus for mitigation of resource availability loss due to SHOs according to some embodiments. Explanation will be given having the RNC 102 function as the control
  • control apparatus may be an RBS, or a combination of RBSs and RNCs, for example.
  • the processing of this flowchart may be performed by the RNC 102 periodically, or may be
  • processing is only performed when necessary. Note that in some embodiments, the processing according to Fig. 5 is performed for each UE 101 in the cells controlled by the RNC 102. Furthermore, the processing may be
  • step S501 the first determination unit
  • This predetermined condition may indicate that the active set is strong enough to sustain a minimum communication quality.
  • the predetermined condition is satisfied when at least one cell in the active set exceeds a predetermined threshold.
  • This threshold could be for a pilot channel signal
  • the communication unit 404 of the RNC 102 transmits a measurement control message to the UE 101 including information instructing UE 101 to perform event-based measurement reporting for event le and event If, as described with reference to Fig. 3.
  • the threshold for events le and If corresponds to the predetermined threshold
  • step S501 UE 101 is triggered by event le to transmit a measurement report message because the CPICH Ec/No signal measurement of the RBS 103 exceeds the threshold, and the communication unit 404 of the RNC 102 receives the measurement report message from the UE 101. Based upon such a message, the first determination unit 405, in step S501, is able to determine whether the strength of the active set of the UE 101 satisfies the predetermined condition.
  • the first determination unit 405 may determine whether the condition is satisfied based on a measurement report message from the UE 101 received when the signal measurements of all of the cells in the active set cease to exceed the threshold
  • the active set would be determined not to be strong in some embodiments. Also the first determination unit 405 may make the
  • determination of the active set strength is not limited to the condition that the CPICH Ec/No signal
  • the active set may be
  • step S502 When the first determination unit 405 determines that the strength of the active set of the UE 101 satisfies the predetermined condition, the processing proceeds to step S502. Otherwise, the processing proceeds to step S505.
  • step S502 the second determination unit
  • the SHO load indicates a degree to which radio links of a particular cell are used for soft handovers.
  • SHO load is determined to exceed a predetermined value indicating a high level of resource wastage, it may be advantageous for the RNC 102 to discourage SHO RL establishment as explained with reference to Fig. 2. Since the active set is determined to be sufficiently strong in step S501, this may lead to a significant increase in system resource availability without having an adverse effect on the quality of the communication by the UE 101.
  • the RNC 102 may maintain information in a storage unit such as the RAM 402 based upon which this SHO load can be determined.
  • the RNC 102 may update this information when RLs to cells that it controls are established or removed, for example. Also, the RNC 102 may obtain such information by communicating with another control apparatus in the system. Note that in some embodiments, the determination of step S502 is performed before that of step S501.
  • the second determination unit 406 determines that the SHO load for the particular cell of the UE 101 exceeds the predetermined value
  • step S503 the generation unit 408 generates a measurement control message in accordance with the strength of the active set being determined by the first determination unit 405 to satisfy the
  • step S501 the predetermined condition
  • step S502 the SHO load for the particular cell being determined by the second determination unit 406 to exceed the predetermined value
  • the determination unit 406 determines the soft handover load to exceed the predetermined value than if the second determination unit 406 determines the soft handover load to not exceed the predetermined value.
  • the generation unit 408 generates the measurement control message so that the user equipment will be less likely to transmit the measurement report message by setting a value of an offset for the particular cell to be lower, the offset used in a condition, comprised in the measurement control message, used to trigger the user equipment to transmit the measurement report message.
  • the offset corresponds to the cell index offset
  • the event corresponds to event la, as explained with reference to Fig. 2.
  • event lb may also be used for the measurement control message, but that it may be more advantageous to use a measurement control message corresponding to event la because there is an overhead in establishing an RL in the first place.
  • event la is used and the value of the cell index offset for the particular cell is set to be cell index offset CIOl, which is lower than a default cell index offset value. This makes the event less likely to be triggered than in the default case.
  • step S503 After the message control message is generated in step S503, the processing proceeds to step S504, and the communication unit 404 transmits the measurement control message to the UE 101.
  • step S505 processing is performed for normal working with respect to the particular cell. If the measurement control message according to
  • embodiments has yet to be sent to the UE 101 for the particular cell, it may be that no particular processing need be taken. However, if the UE 101 was previously sent the measurement control message in accordance with embodiments, another measurement control message may need to be generated and
  • Fig. 6 is a flowchart for illustrating processing performed by the control apparatus for mitigation of resource availability loss due to SHOs according to some embodiments.
  • the resource utilization of the cell in question is considered in the generation of the message control message.
  • Steps S601, S602, S606 and S607 are the same as step S501, S502, S504, and S505 respectively, so explanation thereof is omitted.
  • step S602 When the second determination unit 406 determines that the SHO load for the particular cell crosses a predetermined value in step S602, the processing proceeds to step S603. In step S603, the third determination unit 407 determines a resource utilization which indicates a degree to which radio resources are being used in the particular cell.
  • the generation unit 408 may be advantageous for the generation unit 408 to generate the measurement control message in accordance with the resource utilization in addition to the active set strength and the SHO load. In some embodiments, establishment of SHO RLs with the UE 101 is discouraged more strongly when the resource
  • the utilization of the predetermined cell is determined to be high. This is because in a situation in which the resource utilization of the predetermined cell is high, the benefit to mitigating resource availability loss due to SHOs may be higher.
  • the RNC 102 may maintain information in a storage unit such as the RAM 402 based upon which this resource utilization can be determined.
  • the RNC 102 may update this information when RLs to cells that it controls are established or removed, for example. Also, the RNC 102 may obtain such information by
  • step S603 may be performed before step S601 or step S602.
  • step S603 the third determination unit 407 determines that the resource utilization of the particular cell does not exceed a predetermined value
  • the processing proceeds to step S604, and the generation unit 408 generates the message control message such that it includes the cell index offset CIOl, which is the same as that used in the explanation with reference to Fig. 5.
  • the generation unit 408 generates the measurement control message so that the UE 101 will be less likely to transmit the measurement report message than in the default case.
  • the measurement control message such that it includes the cell index offset CIOl
  • the value of the cell index offset for the particular cell is set to be cell index offset CI01, which is lower than the default cell index offset value.
  • determination unit 407 determines that the resource utilization of the particular cell does exceed a
  • step S605 the generation unit 408 generates the measurement control message so that the UE 101 will be even less likely to transmit the measurement report message than in the case of step S604.
  • the value of the cell index offset for the particular cell is set to be cell index offset CI02, which is even lower than the cell index offset CIOl set in step S604.
  • step S604 the processing proceeds to step S606, and the message is transmitted to the UE 101.
  • resource availability loss due to SHOs is mitigated by discouraging SHO RL establishment when the active set is strong and the SHO load is high.
  • resource availability loss due to SHOs is further mitigated by further discouraging SHO RL establishment when resource utilization is high.
  • the embodiments enhance performance by mitigating resource availability loss due to SHOs while maintaining the benefits of SHOs. This results in improved accessibility in cells having high SHO load.

Landscapes

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

Abstract

L'invention concerne un appareil de commande dans un système de communication à base de CDMA et son procédé de commande. L'appareil de commande détermine si une puissance d'un ensemble actif d'un équipement utilisateur dans une cellule particulière satisfait ou non une condition prédéterminée, et détermine une charge de transfert intercellulaire souple pour la cellule particulière. L'appareil de commande génère un message de commande de mesure conformément à la puissance de l'ensemble actif qui est déterminée pour satisfaire la condition prédéterminée et la charge de transfert intercellulaire souple pour la cellule particulière. L'appareil de commande transmet le message de commande de mesure à l'équipement utilisateur.
PCT/SE2014/050514 2014-04-28 2014-04-28 Appareil de commande et son procédé de commande WO2015167370A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/SE2014/050514 WO2015167370A1 (fr) 2014-04-28 2014-04-28 Appareil de commande et son procédé de commande

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/SE2014/050514 WO2015167370A1 (fr) 2014-04-28 2014-04-28 Appareil de commande et son procédé de commande

Publications (1)

Publication Number Publication Date
WO2015167370A1 true WO2015167370A1 (fr) 2015-11-05

Family

ID=50896468

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE2014/050514 WO2015167370A1 (fr) 2014-04-28 2014-04-28 Appareil de commande et son procédé de commande

Country Status (1)

Country Link
WO (1) WO2015167370A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999060797A2 (fr) * 1998-05-15 1999-11-25 Telefonaktiebolaget Lm Ericsson (Publ) Procede et dispositif permettant une commande de transfert en douceur en fonction de la capacite du reseau d'acces
US6477155B1 (en) * 1998-03-04 2002-11-05 Samsung Electronics, Co., Ltd. Method for determining the number of effective channels and the effective channel rate in a CDMA network
US20060215608A1 (en) * 2005-03-25 2006-09-28 Lee Jung A Method of controlling load sharing between in-cell and soft handoff users
EP2037696A1 (fr) * 2006-07-05 2009-03-18 Huawei Technologies Co., Ltd. Procédé et appareil de transfert cellulaire
WO2012047168A1 (fr) * 2010-10-08 2012-04-12 Telefonaktiebolaget L M Ericsson (Publ) Procédés et dispositifs pour des mesures inter fréquences
US8195167B1 (en) * 2010-07-12 2012-06-05 Sprint Spectrum L.P. Dynamic reverse activity bit offset adjustment based on soft handoff ratio

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6477155B1 (en) * 1998-03-04 2002-11-05 Samsung Electronics, Co., Ltd. Method for determining the number of effective channels and the effective channel rate in a CDMA network
WO1999060797A2 (fr) * 1998-05-15 1999-11-25 Telefonaktiebolaget Lm Ericsson (Publ) Procede et dispositif permettant une commande de transfert en douceur en fonction de la capacite du reseau d'acces
US20060215608A1 (en) * 2005-03-25 2006-09-28 Lee Jung A Method of controlling load sharing between in-cell and soft handoff users
EP2037696A1 (fr) * 2006-07-05 2009-03-18 Huawei Technologies Co., Ltd. Procédé et appareil de transfert cellulaire
US8195167B1 (en) * 2010-07-12 2012-06-05 Sprint Spectrum L.P. Dynamic reverse activity bit offset adjustment based on soft handoff ratio
WO2012047168A1 (fr) * 2010-10-08 2012-04-12 Telefonaktiebolaget L M Ericsson (Publ) Procédés et dispositifs pour des mesures inter fréquences

Similar Documents

Publication Publication Date Title
EP2700262B1 (fr) Procédé d'équilibrage de charge intra fréquence et appareil correspondant
KR101140236B1 (ko) 무선 이동통신 네트워크, 및 모바일 사용자 단말과 접속을위해 기지국 안테나들을 선택하는 방법
JP4921590B2 (ja) アップリンク−ダウンリンク間の不平衡を示すパラメータに基づく無線リソース管理
KR20200038467A (ko) 수신된 안테나 포트 고유의 조정을 이용하여 안테나 포트를 선택하기 위한 방법 및 장치
EP2189013B1 (fr) Procédé de détermination de l'ensemble actif dans un système radio cellulaire
WO2010124913A1 (fr) Suppression automatique d'oscillation de transfert
US9655021B2 (en) System and method for UE-specific offloading
US10362562B2 (en) Uplink signal control method and apparatus
EP2589247A1 (fr) Procédés et dispositifs permettant de configurer des équipements d'utilisateurs avec une pluralité d'antennes de transmission
US7079843B2 (en) Method and apparatus for supporting a soft handoff by establishing a cell set used to facilitate antenna beam mode transitions in a mobile station
US9554367B1 (en) Systems and methods for determining an access node for a wireless device
US10397847B2 (en) System, method, and apparatus for offloading wireless devices
US20200229001A1 (en) Terminal, base station, transmission method, and reception method
US9055540B2 (en) Method for calculating a transmit power for a user equipment
JP2005051767A (ja) 携帯無線通信システムにおいてソフトハンドオーバを管理する方法
US8644871B2 (en) Method and arrangement for maintaining cell coverage
EP3189687A1 (fr) Noeud de réseau et procédé mis en oeuvre par celui-ci pour contrôler la congestion d'une station de base radio
EP2582180A1 (fr) Système de communication radio, station de base radio, terminaux radio et procédé de contrôle de communication
CN104254118A (zh) 功率控制方法、装置及ue
JP4856243B2 (ja) ベストエフォート型マクロダイバーシティ
KR100618662B1 (ko) 셀룰러 네트워크에 다운링크 접속을 제공하기 위한 방법및 시스템
WO2015167370A1 (fr) Appareil de commande et son procédé de commande
CN112822698B (zh) 一种上行数据分流方法及装置

Legal Events

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

Ref document number: 14728678

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 14728678

Country of ref document: EP

Kind code of ref document: A1