Patent•
Method and apparatus for transfer of a message on a common control channel for random access in a wireless communication network
19 Dec 2008-
TL;DR: In this article, the UE may send the message in a protocol data unit (PDU) and may send additional information (e.g., buffer status report) in the PDU if it can accommodate the additional information.
Abstract: Techniques for sending a message for random access by a user equipment (UE) are described. In an aspect, the UE may send the message on a control channel for random access and may send a reserved channel identifier to indicate the message being sent on the control channel. In another aspect, the UE may send the message in a protocol data unit (PDU) and may send additional information (e.g., a buffer status report) in the PDU if it can accommodate the additional information. In yet another aspect, the UE may generate a short message authentication code for integrity protection (MAC-I) for the message. The short MAC-I may have a smaller size and may be used to authenticate the UE. In yet another aspect, the UE may send a UE ID of one of multiple types for random access and may convey the UE ID type via a format field in the message.
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24 Sep 2010TL;DR: In this paper, a system and method for configuring a component carrier assignment message is presented, where the message is configured to identify the component carrier and include at least one of the downlink carrier frequency, a carrier frequency of a paired uplink carrier, and a bandwidth of the pair of uplink carriers.
Abstract: A system and method for configuring a component carrier is presented. A component carrier assignment message is received. The component carrier assignment message may be configured to identify the component carrier and include at least one of, at least one of a downlink carrier frequency, a carrier frequency of a paired uplink carrier, a bandwidth of the component carrier, and a bandwidth of the paired uplink carrier, an indication of whether the component carrier is a control channel monitoring component carrier configured to signal data channel assignment information for the component carrier, and a logical index of the component carrier. The component carrier assignment message may then be used to configure the component carrier on a user equipment (UE).
332 citations
Patent•
22 Apr 2009TL;DR: In this article, a mobile station transmits uplink data to a radio base station by using an uplink radio resource assigned to the mobile station by predetermined scheduling information, in a predetermined cycle.
Abstract: In a mobile communication method according to the present invention, a mobile station (UE) transmits uplink data to a radio base station by using an uplink radio resource assigned to the mobile station by predetermined scheduling information, in a predetermined cycle. The method includes the steps: (A) notifying, to the mobile station (UE), the predetermined cycle and information on the uplink radio resource; (B) notifying, to the mobile station (UE), the predetermined scheduling information; and (C) transmitting uplink data in the predetermined cycle by using the uplink radio resource assigned by the predetermined scheduling information, the transmission starting at a certain point determined on the basis of the received predetermined scheduling information. In the step (C), the predetermined scheduling information is discarded, when the information on the uplink radio resource and information notified by the predetermined scheduling information are inconsistent with each other.
181 citations
Patent•
20 Oct 2010
TL;DR: In this paper, the authors proposed procedures that allow the eNodeB to recognize the power usage status of a UE in a communication system using carrier aggregation, which is achieved by the UE including indicator(s) and/or new MAC CEs to one or more protocol data units transmitted on respective component carriers within a single subframe that is providing the ENodeB with power status information.
Abstract: The invention relates to methods for informing an eNodeB on the transmit power status of a user equipment in a mobile communication system using component carrier (CC) aggregation. Furthermore, the invention is also related to the implementation of these methods by hardware and their implementation in software. The invention proposes procedures that allow the eNodeB to recognize the power usage status of a UE in a communication system using carrier aggregation. The UE indicates to the eNodeB, when the UE is close to using its total maximum UE transmit power or when it has exceeded same. This is achieved by the UE including indicator(s) and/or new MAC CEs to one or more protocol data units transmitted on respective component carriers within a single sub-frame that is providing the eNodeB with power status information. The MAC CEs may report a per-UE power headroom. Alternatively, the MAC CEs may report per-CC power headrooms and/or power reductions applied to the respective uplink CCs.
171 citations
Patent•
07 Feb 2007TL;DR: In this article, a method for transmitting radio resources in a mobile communication system is disclosed, which includes receiving a RACH preamble from a plurality of UEs and transmitting response information associated with the received preambles over a common channel wherein the plurality UEs can access the common channel and receive corresponding information.
Abstract: A method for transmitting radio resources in a mobile communication system is disclosed. The method includes receiving a random access channel (RACH) preamble from a plurality of UEs and transmitting response information associated with the received preambles over a common channel wherein the plurality UEs can access the common channel and receive corresponding information. If a HARQ scheme is used when a UE transmits data to the eNode-B using uplink radio resources allocated over the RACH, the eNode-B does not pre-allocate uplink radio resources required for re-transmission and performs allocation of radio resources for a first transmission of HARQ. If the re-transmission is required, the eNode-B allocates the radio resources required for the re-transmission with the NACK signal. If re-transmission is not required, the present invention can reduce an amount of wasted radio resources.
133 citations
Patent•
17 Jun 2009TL;DR: In this article, a method of performing a random access channel (RACH) procedure between a mobile terminal and a network includes the steps of detecting whether a RAR is received from the network within a certain time period, the RAR including information about a RACH preamble transmitted to the network; and if the rar is not received within the specified time period or if the information about the transmitted RACH pretamble included in the rAR does not match the transmitted rach prioramble, performing a first procedure to detect failures in the RACH procedure;
Abstract: A method of performing a random access channel (RACH) procedure between a mobile terminal and a network includes the steps of detecting whether a random access response (RAR) is received from the network within a certain time period, the RAR including information about a random access channel (RACH) preamble transmitted to the network; and if the RAR is not received within the certain time period or if the information about the transmitted RACH preamble included in the RAR does not match the transmitted RACH preamble, performing a first procedure to detect failures in the RACH procedure; and if the RAR is received within the certain time period and if the information about the transmitted RACH preamble included in the RAR matches the transmitted RACH preamble, performing a second procedure to detect failures in the RACH procedure.
105 citations
References
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Patent•
15 Jul 2002
TL;DR: In this article, an overlay Wireless Location System (WLSS) is presented, where an Abis interface is monitored to obtain information used to locate GSM phones (S116).
Abstract: In an overlay Wireless Location System, an Abis interface is monitored to obtain information used to locate GSM phones (S116). Signaling links of the Abis interface are passively monitored to obtain certain information, such as control and traffic channel assignment, called number, and mobile identification, which is not available from the GSM air interface of the reverse channel (S110-S116). This approach also applies to IDEN and can be broadened to include CDMA systems where the GSM architecture has been used and the system includes a separated BTS to BSC interface.
343 citations
Patent•
06 Feb 2003TL;DR: In this article, a control channel set is assigned to a particular UE among a plurality of user equipments (UEs) by classifying the control channels into a predetermined number of control channels, and assigning the control channel sets so that each UE monitors a particular control set among the control set.
Abstract: A communication system includes a shared channel occupied by a plurality of user equipments (UEs) and spread with a plurality of channelization codes to transmit user data, and a plurality of control channels for transmitting control information related to the shared channel in order to enable the UEs to receive the shared channel signal. The system generates a plurality of control channel sets by classifying the control channels into a predetermined number of control channels, and assigns the control channel sets so that each of the UEs monitors a particular control channel set among the control channel sets. Upon detecting necessity to modify a control channel set to be assigned to a particular UE among the UEs, a Node B determines to modify a control channel set assigned into the UE to a new control channel set at a predetermined point of time to come. After determining to modify the control channel set, the Node B transmits an indicator indicating expected modification of the control channel set and information on the control channel set to be modified to the UE over a downlink.
237 citations
Patent•
18 Jan 2007TL;DR: In this paper, a preamble is sent by the UE via RACH separate and prior to a random access message burst, which is sent on SCH but not until the UE receives one or more messages indicating an acknowledgment of the preamblage and providing an allocation on SCH for use in transmitting the message burst.
Abstract: A random access procedure for use by a UE wireless communication terminal in communicating with a base station (or Node-B or eNB) of a radio access network, and in particular a E-UTRA network. A random access preamble is sent by the UE via RACH separate and prior to a random access message burst, which is sent on SCH but not until the UE receives one or more messages indicating an acknowledgment of the preamble and providing an allocation on SCH for use in transmitting the message burst, and also providing a preamble identifier, which the radio access network can then use to request retransmission of the message burst if necessary.
203 citations
Patent•
06 Sep 2001
TL;DR: In this article, a method for improving the performance of random access when establishing a communication link between a user equipment (UE) and a radio network (UTRAN) is proposed.
Abstract: A method for improving the performance of random access when establishing a communication link between a user equipment (UE) and a radio network (UTRAN) the method includes transmitting a random access message (RAM) from the user equipment (UE) to the radio network (UTRAN), wherein the radio random access message (RAM) contains information describing a functional capability (UB_CAPABILITY) of the user equipment (UE). Thereby, the network knows the capabilities of the terminal as early as possible and can thus optimize all functions performed by the network to be in conformity with the terminal capabilities.
180 citations
Patent•
03 Feb 2006
TL;DR: In this article, the authors proposed a flexible scheduling scheme for uplink transmission based on a request grant scheme, where the resource request of the mobile terminal is provided via a contention-based channel, while all further communication (603, 604, 606) uses scheduled resources.
Abstract: A mobile terminal (103) for requesting resources for transmitting data on uplink within a mobile communication system, and a network entity (102) for allocating uplink resources to the mobile terminal, are disclosed. To provide a flexible scheduling scheme for uplink transmission, scheduling procedures are based on a request grant scheme. The resource request (601) of the mobile terminal is provided via a contention-based channel, while all further communication (603, 604, 606) uses scheduled resources. A reference signal (604) is repeatedly transmitted from the mobile terming to the network entity upon receipt of a resource allocation message in response to the resource request.
160 citations