KR101352554B1 - Method and apparatus of multiplexing data - Google Patents

Abstract

Provided is a data multiplexing method of a terminal. The data multiplexing method receives from the base station information for a specific service including uplink resource allocation information for a service specific identifier for a specific service and a radio bearer list to be transmitted through resources allocated according to the uplink resource allocation information. And multiplexing data of the radio bearer list on the allocated resource.

Description

METHOD AND APPARATUS OF MULTIPLEXING DATA}

The present invention relates to a method and apparatus for multiplexing data, and more particularly, to a method and apparatus for multiplexing data by a terminal supporting bandwidth extension.

The present invention is derived from a study conducted as part of the IT growth engine technology development project of the Ministry of Knowledge Economy [Task Management Number: 2006-S-003-04, Task name: Development of next generation mobile communication service platform].

The terminal may multiplex the data through a logical channel prioritization procedure. That is, the UE multiplexes new transmission data on the basis of priority of each logical channel set in the RRC (Radio Resource Control) layer, PBR (Prioritised Bit Rate) and BSD (Bucket Size Duration). . When performing multiplexing, the UE allocates the allocated resources (hereinafter, referred to as UL Grant resources) according to the uplink resource allocation information by PBR in the order of the logical channels having the highest priority. For example, the descending order of priority of the logical channels is: ① Data from a Medium Access Control (MAC) Control Element for a Cell-Radio Network Temporary Identifier (C-RNTI) or an Uplink Common Control Channel (UL-CCCH). , ② MAC control element for BSR, except for BSR (Buffer Status Report) to include for padding, ③ MAC control element for PHR (Power Headroom Report), ④ except for data from UL-CCCH, MAC control element for BSR including for data from logical channel and 5 padding. That is, the terminal multiplexes new transmission data in the descending order of priority of the logical channels. The terminal terminates multiplexing when the UL grant resource is exhausted or there is no longer a logical channel with data to be transmitted.

Here, the terminal may provide a specific service. An example of a particular service is a Voice of Internet Protocol (VoIP) service that conforms to Semi Persistent Scheduling (SPS). In order for the terminal to receive a specific service, the base station sets a service specific C-RNTI (Service Specific C-RNTI) for the specific service data transmission to the terminal, and in addition to the UL Grant resource for the C-RNTI, the service specific C-RNTI ( Allocate UL Grant resource for Service Specific C-RNTI). If the specific service is a service according to the ring scheduling, the service specific C-RNTI may be referred to as an SPS C-RNTI. The UE multiplexes data on the UL grant resources allocated from the base station and transmits the data in uplink.

Meanwhile, bandwidth extension has been discussed to improve the transmission rate of a wireless communication system. If the wireless communication system supports bandwidth expansion, the terminal may simultaneously perform uplink transmission or downlink reception through a plurality of component carriers (CCs). Accordingly, the terminal receives uplink resource allocation information for the C-RNTI through one CC of the plurality of CCs in the same subframe, and provides uplink resource allocation information for the service specific C-RNTI through another CC. Can be received.

When the terminal multiplexes data according to the logical channel prioritization procedure, if there is data of a specific service to be newly transmitted in the buffer of the terminal and the priority of the corresponding logical channel is high, the C-RNTI is determined according to the logical channel priority. Data of a specific service may be multiplexed on the UL Grant resource. Accordingly, a problem may occur in which UL grant resources for service-specific C-RNTIs are wasted.

In addition, when there is data to be transmitted in a logical channel having a higher priority than a logical channel of a specific service, data other than data of a specific service may be multiplexed on the UL Grant resource for the service specific C-RNTI. At this time, unnecessary segmentation of data may occur and may not be transmitted at a time when data of a specific service is to be transmitted. Accordingly, in the case of a VoIP service in which a specific service is transmitted periodically, the quality of service is degraded. In addition, a resource release procedure for a service specific C-RNTI may not be properly performed.

It is an object of the present invention to provide a method and apparatus for multiplexing data that can efficiently use radio resources.

A data multiplexing method of a terminal according to an aspect of the present invention includes uplink resource allocation information for a service specific identifier for a specific service from a base station and a radio bearer list to be transmitted through resources allocated according to the uplink resource allocation information. Receiving information for a specific service, and multiplexing data of the radio bearer list on the allocated resource.

A resource allocation method of a base station according to an aspect of the present invention provides a specific service including uplink resource allocation information for a service specific identifier for a specific service and a radio bearer list to be transmitted through resources allocated for the service specific identifier. Setting the information for the service, and transmitting the information for the specific service to the terminal.

A terminal according to an aspect of the present invention provides a specific service including a radio bearer list to be transmitted from a base station through uplink resource allocation information for service specific identifier for a specific service and resources allocated according to the uplink resource allocation information. A wireless communication unit for receiving the information, and transmits the multiplexed data to the base station, and a control unit for multiplexing the data of the radio bearer list to the allocated resources.

Provided are a method and apparatus for multiplexing data that can efficiently use radio resources. In particular, data can be multiplexed without wasting resources allocated for a particular service, and resources allocated for a particular service can be released at an appropriate time.

1 is a diagram illustrating an example in which a terminal transmits a Voice of Internet Protocol (VoIP) service on an uplink.
2 illustrates an example of data transmission of a terminal when a terminal is allocated a UL Grant resource for a C-RNTI and a UL Grant resource for a service specific C-RNTI.
3 is a flowchart illustrating a data multiplexing method of a terminal at the time of transmitting a specific service according to an embodiment of the present invention.
4 is a block diagram illustrating a structure of a terminal according to an embodiment of the present invention, and FIG. 5 is a flowchart illustrating a multiplexing method of a terminal according to an embodiment of the present invention.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

Throughout the specification, when a part is said to "include" a certain component, it means that it can further include other components, without excluding other components unless specifically stated otherwise.

In this specification, a terminal includes a mobile station (MS), a mobile terminal (MT), a subscriber station (SS), a portable subscriber station (PSS), a user equipment , An access terminal (AT), an access terminal (AT), and the like, and may include all or some of functions of a terminal, a mobile station, a mobile terminal, a subscriber station, a mobile subscriber station, a user equipment, .

In the present specification, a base station (BS) is a radio access station (RAS), a node B (Node B), an advanced node B (evolved NodeB, eNodeB), a base transceiver station (Base Transceiver Station, BTS), MMR (Mobile Multihop Relay) -BS and the like, and may include all or part of the functions of a base station, a radio access station, a NodeB, an eNodeB, a base transceiver station, an MMR-BS, and the like.

1 is a diagram illustrating an example in which a terminal transmits a Voice of Internet Protocol (VoIP) service on an uplink. VoIP service is an example of a specific service, semi-persistent scheduling (Semi Persistent Scheduling).

Referring to FIG. 1, a terminal sets a transmission period of a specific service, for example, a service specific C-RNTI (Cell Radio Network Temporary Identifier) and a VoIP service in a radio resource control (RRC) layer. do. Here, the C-RNTI means an identifier for identifying a connection of the terminal in the cell region, and the service specific C-RNTI means a C-RNTI for a specific service.

When the terminal receives the uplink resource allocation information (hereinafter referred to as UL Grant) 10 for the service-specific C-RNTI from the base station, the terminal receives an uplink resource allocated by the UL Grant (forward UL) for each transmission period of the VoIP service. The data 20 is multiplexed and transmitted to the grant resource). Accordingly, the terminal may periodically transmit the uplink VoIP service without receiving uplink resource allocation information through the physical downlink control channel (PDCCH) at every transmission period of the VoIP service.

If the data transmitted by the UE through the UL Grant resource for the service specific C-RNTI does not exist for two or three times, the release procedure of the UL Grant resource for the service specific C-RNTI may be performed. The release procedure of the UL grant resource for the service specific C-RNTI may be preset in the RRC layer.

On the other hand, if the mobile communication system supports the bandwidth extension, the UE in the same subframe uplink resource allocation information (for example, UL) for the C-RNTI through one CC of a plurality of component carriers (Component Carrier, CC) Grant) and uplink resource allocation information for a service specific C-RNTI may be received through another CC.

2 illustrates an example of data transmission of a terminal when a terminal is allocated a UL Grant resource for a C-RNTI and a UL Grant resource for a service specific C-RNTI.

Referring to FIG. 2, data of a radio bearer (RB) for a specific service and data of an RB other than the radio bearer for a specific service are present together in a buffer of the terminal, and the terminal is configured for C-RNTI from a base station. After the UL Grant resource A1 is allocated, the UL Grant resource B1 for the service specific C-RNTI may be allocated. At this time, the UL grant resource (A1) for the C-RNTI of the radio bearer (hereinafter referred to as a specific service RB) for the specific service (C11) of the RB other than the specific service RB (hereinafter referred to as a general RB) When multiplexing the data C12, the UL Grant resource B1 allocated in advance for the service specific C-RNTI may be wasted. In addition, data C11 and C13 of a specific service RB may be unnecessarily divided according to the size of the UL Grant resource.

On the contrary, the data C21 of the specific service RB and the data C22 of the general RB exist together in the buffer of the terminal, and the terminal is located in the UL Grant resource A2 for the C-RNTI and the service specific C-RNTI from the base station. UL Grant resource (B2) may be allocated in the same subframe. In this case, the data C21 of a specific service RB having a high priority is first multiplexed to a UL grant resource A2 for the C-RNTI by a logical channel prioritization procedure, and the UL grant resource B2 for the remaining C-RNTI. When multiplexing the data C22 of the general RB, the data C22 of the general RB may be unnecessarily divided.

Alternatively, only general RB data C31 and C32 exist in a buffer of the terminal, and the terminal is allocated an UL Grant resource B3 for a service-specific C-RNTI from a base station, and an UL Grant resource (A3) for C-RNTI. ) Can be assigned. In this case, the data C31 of the general RB may be multiplexed on the UL Grant resource B3 for the service specific C-RNTI. Accordingly, the UL Grant resource (A3) for the C-RNTI dynamically allocated by the base station according to the buffer amount of the terminal may be wasted.

Therefore, there is a need for a multiplexing method to prevent resource waste and unnecessary partitioning of data.

3 is a flowchart illustrating a data multiplexing method of a terminal at the time of transmitting a specific service according to an embodiment of the present invention. One example of a specific service may be a VoIP service, which is a semi-persistent scheduling service.

Referring to FIG. 3, the base station sets information for specific service transmission (S300). The information for specific service transmission includes a service specific C-RNTI identifier, UL grant allocation information for specific service data transmission, a radio bearer (RB) list and service to be transmitted through a UL grant resource for a service specific C-RNTI. Multiplexing information on the UL Grant resource for a specific C-RNTI may be included. The RB list may include at least one RB identifier. The multiplexing information means information on whether to allow multiplexing of RBs (hereinafter, referred to as RBs other than the RB list) other than the RB list transmitted through the UL Grant resource for the service specific C-RNTI. Information on whether to allow multiplexing of RBs other than the RB list has a value of true or false, and one of true or false may be set as a default value.

The base station transmits configuration information for a specific service to the terminal (S310). If the specific service is a ring scheduling service, configuration information for the specific service may be transmitted in the form of a configuration message before the specific service is started. And, even when the setting information is changed while the specific service is performed, it may be transmitted.

The terminal performs multiplexing on the basis of the information for the specific service transmission received from the base station (S320). Data of the RB included in the RB list transmitted through the UL Grant resource for the service specific C-RNTI is multiplexed onto the UL Grant resource for the service specific C-RNTI. That is, the data of the RB included in the RB list is not multiplexed onto resources that are not allocated for the service specific C-RNTI (eg, UL Grant resources for the C-RNTI) regardless of priority. When the information on whether to allow multiplexing has a value of true, the RB data other than the RB list is multiplexed according to the priority of the UL Grant resource for the service specific C-RNTI. On the other hand, if the information on whether to allow multiplexing has a false value, the data of the RB other than the RB list is not multiplexed to the UL Grant resource for the service specific C-RNTI.

If the data of the RB list is not multiplexed for a predetermined number of times in the UL Grant resource for the service specific C-RNTI, the terminal releases the UL Grant resource for the service specific C-RNTI (S330). In this case, the predetermined number of transmissions may be based on release information set in the RRC layer. The release information may be, for example, implicitReleaseAfter. Therefore, if there is no data of the RB list and there is data of the RB other than the RB list, even if the data of the RB other than the RB list is multiplexed to the UL Grant resource for the service-specific C-RNTI for a predetermined number of times, the terminal may select the service-specific C-. Release the UL Grant resource for RNTI.

4 is a block diagram illustrating a structure of a terminal according to an embodiment of the present invention, and FIG. 5 is a flowchart illustrating a multiplexing method of a terminal according to an embodiment of the present invention.

Referring to FIG. 4, the terminal 400 includes a wireless communication unit 410, a control unit 420, a storage unit 430, an input unit 440, and an output unit 450.

The wireless communication unit 410 performs a wireless communication function of the terminal 400. The wireless communication unit 410 may include an RF unit for transmitting and receiving a radio frequency (RF) signal.

The controller 420 controls the overall operation of the terminal 400. The controller 420 may include a data processor that encodes and modulates a transmitted signal or demodulates and decodes a received signal.

The storage unit 430 stores a program and an input / output data for the operation of the control unit 420.

The input unit 440 receives data or information for controlling the operation of the terminal from the user.

The output unit 450 displays the information processed by the terminal 400 to the user as various types of signals (for example, sound signals and visual signals).

4 and 5, the wireless communication unit 410 of the terminal 400 is a UL Grant for the C-RNTI, a UL Grant for the service-specific C-RNTI and a UL Grant resource for the service-specific C-RNTI from the base station Information for a specific service including a list of RBs to be transmitted through is received (S500). The information for the specific service may further include information on whether multiplexing of data of the RB other than the RB list is allowed in the UL Grant resource for the service specific C-RNTI. When the terminal supports bandwidth extension, the terminal receives the UL Grant for the C-RNTI through one CC of a plurality of component carriers in the same subframe, and the UL Grant for the service specific C-RNTI through the other CC Can be received.

The control unit 420 of the terminal 400 determines whether there is a UL Grant resource for the C-RNTI in the corresponding subframe (S510). If there is a UL Grant resource for C-RNTI, the RBs having data to be transmitted are multiplexed according to priority (S520). Here, the RB means an RB other than the RB list transmitted through the UL Grant resource for the service specific C-RNTI.

When performing multiplexing on the UL Grant resource for the C-RNTI or when there is no UL Grant resource for the C-RNTI, the control unit 420 of the UE 400 may determine that the UL Grant resource for the service-specific C-RNTI in the corresponding subframe. It is determined whether (S530). If there is a UL Grant resource for the service specific C-RNTI, the control unit 420 of the terminal 400 determines whether multiplexing of RB data other than the RB list is allowed for the UL Grant resource for the service specific C-RNTI ( S540).

If multiplexing of RB data other than the RB list is allowed in the UL Grant resource for the service specific C-RNTI, the control unit 420 of the terminal 400 may include the RB list having data to be transmitted and the RB having data to be transmitted other than the RB list. The multiplexing is performed on the UL grant resource for the service specific C-RNTI according to the priority (S550).

If the multiplexing of RB data other than the RB list is not allowed in the UL Grant resource for the service specific C-RNTI, the control unit 420 of the terminal 400 selects the RB list having data to be transmitted according to the priority of the service specific C-RNTI. Multiplexing is performed on the UL Grant resource for the RNTI (S560).

If multiplexing is performed according to step S550 or S560 or if it is determined in step S530 that there is no UL Grant resource for the service-specific C-RNTI, the control unit 420 of the terminal 400 terminates the multiplexing procedure (S570).

 As such, when the base station informs the terminal of information on whether the RB list using the UL Grant resource for the service specific C-RNTI and the RB other than the RB list are multiplexed on the UL Grant resource for the service specific C-RNTI, Multiplexing can be performed using resources efficiently.

The embodiments of the present invention described above are not implemented only by the apparatus and method, but may be implemented through a program for realizing the function corresponding to the configuration of the embodiment of the present invention or a recording medium on which the program is recorded.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, It belongs to the scope of right.

Claims (19)

In the data multiplexing method of the terminal,
Receiving information for a specific service from a base station, the information including uplink resource allocation information for a service specific identifier for a specific service and a radio bearer list to be transmitted through resources allocated according to the uplink resource allocation information;
Multiplexing data in the radio bearer list to the allocated resources. The method of claim 1,
The information for the specific service further includes information indicating whether multiplexing of data of a radio bearer other than the radio bearer list is allowed as the allocated resource. 3. The method of claim 2,
The multiplexing may include:
Multiplexing data of the radio bearer list other than the radio bearer list and data of the radio bearer other than the radio bearer list according to priority if multiplexing of data of the radio bearer other than the radio bearer list is allowed; and
If multiplexing of data of a radio bearer other than the radio bearer list is not allowed, multiplexing the data of the radio bearer list to the allocated resources according to priority. The method of claim 3,
Releasing the allocated resource if the data in the radio bearer list is not multiplexed for a predetermined number of transmissions in the allocated resource. 5. The method of claim 4,
The predetermined number of transmissions is set in the terminal through an RRC configuration message. The method of claim 1,
The specific service is a ring scheduling service. The method of claim 1,
Wherein the identifier is a Cell Radio Network Temporary Identifier (C-RNTI). The method of claim 1,
Receiving uplink resource allocation information on a generic identifier from the base station, and
Multiplexing data of radio bearers other than the radio bearer list in priority order to resources allocated for the general identifier. 9. The method of claim 8,
The uplink resource allocation for the general identifier is dynamically performed according to the amount of data existing in the buffer of the terminal. 9. The method of claim 8,
The terminal supports bandwidth expansion,
Receiving uplink resource allocation information for the general identifier through one of a plurality of component carriers in the same subframe, and receiving uplink resource allocation information for the service specific identifier through one of the other component carriers. delete In the resource allocation method of the base station,
Uplink resource allocation information for a service specific identifier for a specific service, a radio bearer list to be transmitted through a resource allocated for the service specific identifier, and a radio bearer other than the radio bearer list may be multiplexed onto the allocated resource. Setting information for a particular service, including information about whether there is information, and
Transmitting information for the specific service to a terminal. In the resource allocation method of the base station,
Setting up information for a specific service including uplink resource allocation information for a service specific identifier for a specific service and a radio bearer list to be transmitted through resources allocated for the service specific identifier; and
Transmitting information for the specific service to a terminal;
The specific service is a semi-persistent scheduling (SPS) service. The method of claim 13,
The ring scheduling service is a Voice of Internet Protocol (VoIP) service. Data received and multiplexed from the base station for information on a specific service including uplink resource allocation information for a service specific identifier for a specific service and a radio bearer list to be transmitted through resources allocated according to the uplink resource allocation information Wireless communication unit for transmitting to the base station, and
And a controller configured to multiplex the data of the radio bearer list to the allocated resource. 16. The method of claim 15,
The information for the specific service further includes information indicating whether multiplexing of data of a radio bearer other than the radio bearer list is allowed as the allocated resource. 16. The method of claim 15,
The wireless communication unit further receives uplink resource allocation information for the general identifier from the base station,
The control unit is a terminal for multiplexing the data of the radio bearer other than the radio bearer list to the resources allocated for the general identifier according to the priority. 16. The method of claim 15,
The control unit,
If multiplexing of data of a radio bearer other than the radio bearer list is allowed, the data of the radio bearer list and data of the radio bearer other than the radio bearer list are multiplexed to the allocated resources according to priority.
And if multiplexing of data of a radio bearer other than the radio bearer list is not allowed, multiplexing the data of the radio bearer list to the allocated resources according to priority. 19. The method of claim 18,
And a storage unit for storing data of the radio bearer list and data of the radio bearer other than the radio bearer list.

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