CN108076482B - Uplink enhanced data transmission method and device and user equipment - Google Patents
Uplink enhanced data transmission method and device and user equipment Download PDFInfo
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- CN108076482B CN108076482B CN201611031029.1A CN201611031029A CN108076482B CN 108076482 B CN108076482 B CN 108076482B CN 201611031029 A CN201611031029 A CN 201611031029A CN 108076482 B CN108076482 B CN 108076482B
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Abstract
The invention provides an uplink enhanced data transmission method, an uplink enhanced data transmission device and user equipment. When the UE is switched from the cell-FACH state to the cell-DCH state and correspondingly the MAC layer is reconfigured from the MAC-i entity to the MAC-e entity, the method comprises the following steps: the RLC layer stores data into a buffer of the MAC layer in an RLC PDU form; the MAC layer reads the state of the RLC PDU in the buffer and determines whether the RLC PDU residual segmentation exists; if the residual RLC PDU segments exist in the buffer, restoring the residual RLC PDU segments into complete RLC PDUs before segmentation, and combining and transmitting the restored RLC PDUs and other RLC PDUs cached in the buffer according to the data size of the MAC PDU of the MAC-e entity. The invention can avoid data retransmission, reduce data transmission delay, ensure the stability of data transmission service and improve the system performance.
Description
Technical Field
The present invention relates to the field of data transmission technologies, and in particular, to a method and an apparatus for transmitting uplink enhanced data, and a user equipment.
Background
In a WCDMA (Wideband Code Division Multiple Access) network, uplink Data transmission on a UE (User Equipment) side is stored from an RLC (Radio Link Control) layer into a buffer of an MAC (Media Access Control) layer in the form of an RLC PDU (Protocol Data Unit), and the MAC layer reads a set of RLC PDUs from the buffer to form an MAC PDU for transmission. When the uplink transmission data volume is enhanced, the UE switches from a Cell-FACH (Forward Access Channel) state to a Cell-DCH (Cell-Dedicated Channel) state, and the corresponding MAC is reconfigured from a MAC-i entity to a MAC-e entity, where the MAC-i entity is transmitted in a manner of sectionalizing and packaging RLC PDUs, and the MAC-e entity does not have a sectionalizing function. At this time, the configuration of the RLC does not change, and the RLC PDU in the transmission state is stored in the buffer and is not deleted, so that the MAC-e entity cannot normally process the remaining segmented data generated by the MAC-i entity segmenting the PDU before the state transition.
In the process of implementing the invention, the inventor finds that at least the following technical problems exist in the prior art:
and deleting the buffered data, and retransmitting the PDU from the RLC by depending on a status report of the network side, wherein the delay is large, the timeliness of data transmission cannot be ensured, and data transmission fluctuation or interruption is caused.
Disclosure of Invention
The uplink enhanced data transmission method, the device and the user equipment provided by the invention can avoid data retransmission, reduce data transmission delay, ensure the stability of data transmission service and improve the system performance.
In a first aspect, the present invention provides a method for transmitting uplink enhanced data, wherein when a UE switches from a cell-FACH state to a cell-DCH state, a MAC layer is reconfigured from a MAC-i entity to a MAC-e entity, and the method includes:
the RLC layer stores data into a buffer of the MAC layer in an RLC PDU form;
the MAC layer reads the state of the RLC PDU in the buffer and determines whether the RLC PDU residual segmentation exists; if the residual RLC PDU segments exist in the buffer, restoring the residual RLC PDU segments into complete RLC PDUs before segmentation, and combining and transmitting the restored RLC PDUs and other RLC PDUs cached in the buffer according to the data size of the MAC PDU of the MAC-e entity.
Optionally, the storing, by the RLC layer, data in a buffer of the MAC layer in the form of RLC PDU includes: and storing the RLC PDU and the state of the RLC PDU into the buffer.
Optionally, the status of the RLC PDU in the read buffer includes: and reading basic data parameters which embody the state of the RLC PDU and are stored in the buffer.
Optionally, the RLC PDU remaining segmentation refers to: before UE is switched to a cell-DCH state from a cell-FACH state, an MAC-i entity of an MAC layer carries out segmentation on RLC PDUs according to the data size of the MAC PDUs of the MAC-i entity, and the generated RLC PDUs are segmented in a residual mode.
In a second aspect, the present invention provides an uplink enhanced data transmission apparatus, wherein when a UE switches from a cell-FACH state to a cell-DCH state, a MAC layer is reconfigured from a MAC-i entity to a MAC-e entity, and the apparatus includes:
the RLC unit is used for storing the data into a buffer of the MAC unit in an RLC PDU form;
the buffer is used for storing the RLC PDU and the RLC PDU status data transmitted by the RLC unit and providing the RLC PDU status data for the MAC unit to read;
the MAC unit is used for reading the state of the RLC PDU in the buffer and determining whether the RLC PDU residual segmentation exists; if the residual RLC PDU segments exist in the buffer, restoring the residual RLC PDU segments into complete RLC PDUs before segmentation, and combining and transmitting the restored RLC PDUs and other RLC PDUs cached in the buffer according to the data size of the MAC PDU of the MAC-e entity.
Optionally, the RLC unit is configured to store the RLC PDU and a status of the RLC PDU in the buffer.
Optionally, the MAC unit is configured to read a basic data parameter stored in the buffer and representing the status of the RLC PDU.
Optionally, the RLC PDU remaining segmentation read in the MAC unit refers to: before the UE is switched to the cell-DCH state from the cell-FACH state, the RLC PDU generated by the MAC-i entity in the MAC unit is segmented into the RLC PDU according to the data size of the MAC PDU of the MAC-e entity.
In a third aspect, the present invention provides a user equipment, where the user equipment includes the above uplink enhanced data transmission apparatus.
According to the uplink enhanced data transmission method, device and user equipment provided by the embodiment of the invention, when UE is switched from a cell-FACH state to a cell-DCH state and correspondingly an MAC layer is reconfigured from an MAC-i entity to an MAC-e entity, an RLC layer stores data into a buffer of the MAC layer in an RLC PDU form; the MAC layer reads the state of the RLC PDU in the buffer and determines whether the RLC PDU residual segmentation exists; if the residual RLC PDU segments exist in the buffer, restoring the residual RLC PDU segments into complete RLC PDUs before segmentation, and combining and transmitting the restored RLC PDUs and other RLC PDUs cached in the buffer according to the data size of the MAC PDU of the MAC-e entity. Compared with the prior art, the invention can avoid data retransmission, reduce data transmission delay, ensure the stability of data transmission service and improve the system performance.
Drawings
Fig. 1 is a flowchart of an uplink enhanced data transmission method according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an uplink enhanced data transmission apparatus according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides an uplink enhanced data transmission method, as shown in fig. 1, when UE switches from a cell-FACH state to a cell-DCH state, correspondingly, an MAC layer is reconfigured from an MAC-i entity to an MAC-e entity, the method comprises the following steps:
s101, the RLC layer stores the data into a buffer of the MAC layer in an RLC PDU mode.
Specifically, the RLC layer storing data in a buffer of the MAC layer in the form of RLC PDUs includes: and storing the RLC PDU and the state of the RLC PDU into the buffer.
S102, the MAC layer reads the state of the RLC PDU in the buffer and determines whether the RLC PDU residual segmentation exists; if the residual RLC PDU segments exist in the buffer, restoring the residual RLC PDU segments into complete RLC PDUs before segmentation, and combining and transmitting the restored RLC PDUs and other RLC PDUs cached in the buffer according to the data size of the MAC PDU of the MAC-e entity.
Specifically, the status of the RLC PDU in the read buffer includes: and reading basic data parameters which embody the state of the RLC PDU and are stored in the buffer.
Further, the RLC PDU residual segmentation refers to: before UE is switched to a cell-DCH state from a cell-FACH state, an MAC-i entity of an MAC layer carries out segmentation on RLC PDUs according to the data size of the MAC PDUs of the MAC-i entity, and the generated RLC PDUs are segmented in a residual mode.
Restoring the remaining segments of the RLC PDU to a complete RLC PDU before segmentation is explained below with reference to an example:
the status of RLC PDU in the buffer can be represented by three basic parameters (address, remaining length, transmission status). Wherein, the address refers to the initial address of the unsent data; the remaining length refers to the number of bytes of unsent data; the transmission state refers to either no transmission at all or partial transmission or full transmission. For example, an RLC PDU is initially (0x8ef30000, 256bytes, not transmitted at all) when it is put into the buffer, and is segmented when the PDU constituting the MAC-i entity is transmitted only 64bytes, so that the status of the PDU after segmentation is (0x8ef30040, 192bytes, partial transmission); when the MAC entity is reconfigured from MAC-i to MAC-e, the state information of RLC PDU is restored in the buffer to restore it to the original state, i.e. (0x8ef30000, 256bytes, not transmitted at all).
In the uplink enhanced data transmission method provided by the embodiment of the invention, when UE is switched from a cell-FACH state to a cell-DCH state and correspondingly an MAC layer is reconfigured from an MAC-i entity to an MAC-e entity, an RLC layer stores data into a buffer of the MAC layer in an RLC PDU form; the MAC layer reads the state of the RLC PDU in the buffer and determines whether the RLC PDU residual segmentation exists; if the residual RLC PDU segments exist in the buffer, restoring the residual RLC PDU segments into complete RLC PDUs before segmentation, and combining and transmitting the restored RLC PDUs and other RLC PDUs cached in the buffer according to the data size of the MAC PDU of the MAC-e entity. Compared with the prior art, the invention can avoid data retransmission, reduce data transmission delay, ensure the stability of data transmission service and improve the system performance.
An embodiment of the present invention further provides an uplink enhanced data transmission apparatus, as shown in fig. 2, when a UE switches from a cell-FACH state to a cell-DCH state, a MAC layer is reconfigured from a MAC-i entity to a MAC-e entity, where the apparatus includes:
an RLC unit 201, configured to store data in the form of RLC PDU into a buffer of the MAC unit 203;
a buffer 202, configured to store the RLC PDU and RLC PDU status data transmitted by the RLC unit 201 and provide the RLC PDU status data for the MAC unit 203 to read;
a MAC unit 203, configured to read a status of the RLC PDU in the buffer 202 and determine whether there is a RLC PDU remaining segment; if the buffer 202 has the RLC PDU residual segment, restoring the RLC PDU residual segment into a complete RLC PDU before segmentation, and combining and transmitting the restored RLC PDU and other RLC PDUs buffered in the buffer 202 according to the data size of the MAC PDU of the MAC-e entity.
In the uplink enhanced data transmission device provided by the embodiment of the invention, when the UE is switched from the cell-FACH state to the cell-DCH state and correspondingly the MAC layer is reconfigured from the MAC-i entity to the MAC-e entity, the RLC layer stores data in the buffer of the MAC layer in the form of RLC PDU; the MAC layer reads the state of the RLC PDU in the buffer and determines whether the RLC PDU residual segmentation exists; if the residual RLC PDU segments exist in the buffer, restoring the residual RLC PDU segments into complete RLC PDUs before segmentation, and combining and transmitting the restored RLC PDUs and other RLC PDUs cached in the buffer according to the data size of the MAC PDU of the MAC-e entity. Compared with the prior art, the invention can avoid data retransmission, reduce data transmission delay, ensure the stability of data transmission service and improve the system performance.
Optionally, the RLC unit 201 is configured to store the RLC PDU and the status of the RLC PDU in the buffer.
Further, the MAC unit 203 is configured to read basic data parameters stored in the buffer 202 and reflecting the status of the RLC PDU.
Further, the RLC PDU residual segmentation read in the MAC unit 203 refers to: before the UE switches from the cell-FACH state to the cell-DCH state, the MAC-i entity in the MAC unit 203 generates RLC PDU residue segments according to the data size of the MAC PDU of the MAC-e entity.
The embodiment of the invention also provides the user equipment, and the user equipment comprises the uplink enhanced data transmission device.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), or the like.
The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (7)
1. A method for transmitting uplink enhanced data is characterized in that when UE is switched from a cell-FACH state to a cell-DCH state, correspondingly, a MAC layer is reconfigured from a MAC-i entity to a MAC-e entity, and the method comprises the following steps:
the RLC layer stores data into a buffer of the MAC layer in an RLC PDU form;
the MAC layer reads basic data parameters which embody the state of the RLC PDU and are stored in the buffer and determines whether residual segmentation of the RLC PDU exists or not, wherein the basic data parameters comprise an address, a residual length and a sending state; if the residual RLC PDU segments exist in the buffer, restoring the residual RLC PDU segments into complete RLC PDUs before segmentation, and combining and transmitting the restored RLC PDUs and other RLC PDUs cached in the buffer according to the data size of the MAC PDU of the MAC-e entity.
2. The method of claim 1, wherein the RLC layer storing data in the form of RLC PDUs in a buffer of the MAC layer comprises:
and storing the RLC PDU and the state of the RLC PDU into the buffer.
3. The method of claim 1, wherein the RLC PDU remaining segmentation refers to:
before UE is switched to a cell-DCH state from a cell-FACH state, an MAC-i entity of an MAC layer carries out segmentation on RLC PDUs according to the data size of the MAC PDUs of the MAC-i entity, and the generated RLC PDUs are segmented in a residual mode.
4. An uplink enhanced data transmission device, wherein when a UE switches from a cell-FACH state to a cell-DCH state, a MAC layer is reconfigured from a MAC-i entity to a MAC-e entity, and the device comprises:
the RLC unit is used for storing the data into a buffer of the MAC unit in an RLC PDU form;
the buffer is used for storing the RLC PDU and the RLC PDU status data transmitted by the RLC unit and providing the RLC PDU status data for the MAC unit to read;
the MAC unit is used for reading basic data parameters which embody the state of the RLC PDU and are stored in the buffer and determining whether residual segmentation of the RLC PDU exists or not, wherein the basic data parameters comprise an address, a residual length and a sending state; if the residual RLC PDU segments exist in the buffer, restoring the residual RLC PDU segments into complete RLC PDUs before segmentation, and combining and transmitting the restored RLC PDUs and other RLC PDUs cached in the buffer according to the data size of the MAC PDU of the MAC-e entity.
5. The apparatus of claim 4, wherein the RLC unit is configured to store RLC PDUs and the status of the RLC PDUs in the buffer.
6. The apparatus of claim 4, wherein the RLC PDU remaining segments read in the MAC unit refer to:
before the UE is switched to the cell-DCH state from the cell-FACH state, the RLC PDU generated by the MAC-i entity in the MAC unit is segmented into the RLC PDU according to the data size of the MAC PDU of the MAC-e entity.
7. A user equipment, characterized in that the user equipment comprises the uplink enhanced data transmission apparatus according to any one of claims 4 to 6.
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| CN101919298A (en) * | 2008-01-04 | 2010-12-15 | 交互数字专利控股公司 | Method and apparatus for performing an enhanced random access channel procedure in a CELL_FACH state |
| CN103916907A (en) * | 2007-09-28 | 2014-07-09 | 交互数字专利控股公司 | Method for creating MAC-e PDU associated with E-TFC selection and WTRU |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20130045693A1 (en) * | 2011-08-15 | 2013-02-21 | Renesas Mobile Corporation | Method and apparatus for triggering measurement reporting based upon neighbor cell interference |
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| EP1803236A1 (en) * | 2005-01-06 | 2007-07-04 | LG Electronics Inc. | Improvements to high speed uplink packet access scheme |
| CN103916907A (en) * | 2007-09-28 | 2014-07-09 | 交互数字专利控股公司 | Method for creating MAC-e PDU associated with E-TFC selection and WTRU |
| CN101425884A (en) * | 2007-10-30 | 2009-05-06 | 华为技术有限公司 | Data transmission method and device for uplink in radio communication |
| CN101911804A (en) * | 2008-01-04 | 2010-12-08 | 交互数字专利控股公司 | Method and apparatus for performing WTRU state transition with enhanced RACH in HSPA systems |
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