CN106160955B - Control circuit for controlling wireless user equipment to actively retransmit radio resource control information - Google Patents
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Abstract
The invention provides a control circuit for controlling wireless user equipment to actively retransmit wireless resource control information, which comprises: an information generating circuit configured to generate a target rrc message to be transmitted to a communication station via a radio communication circuit of the wireless ue, wherein the target rrc message is a rrc message of a predetermined type; and a data control circuit, coupled to the information generating circuit, configured to transmit the target rrc message to the communication station via the wireless communication circuit, and to retransmit the target rrc message to the communication station via the wireless communication circuit at least once before the wireless communication circuit receives a negative acknowledgement message corresponding to the target rrc message generated by the communication station.
Description
Technical Field
The present invention relates to mobile communication systems, and more particularly, to a control circuit for controlling active retransmission of rrc messages by a wireless ue.
Background
In a conventional mobile communication system, a wireless user equipment (wireless user equipment) uploads some important Radio Resource Control (RRC) message to a network according to a change of signal channel quality (signal channel quality) or a requirement of completing a handover (handover) procedure, for example, a Radio Resource Control (RRC) connection reconfiguration complete message (RRC connection reconfiguration complete message, hereinafter referred to as RRC connection reconfiguration complete message), or measurement report message (measurement report message) including measurement report (measurement report) data.
The signal environment of the wireless ue may change at any time, and if the current signal connection quality of the wireless ue is poor, the network may not be able to receive the specific rrc message transmitted by the wireless ue smoothly. In this case, according to the standard procedure of the conventional mobile communication system, the wireless ue must wait until a Negative Acknowledgement (NACK) message corresponding to the specific rrc message is transmitted from the network, and then attempt to retransmit the specific rrc message to the network.
However, the time spent waiting for the negative acknowledgement often delays the time for the network to receive the specific rrc message, thereby causing a problem of connection or call interruption of the wireless ue.
Disclosure of Invention
Therefore, how to avoid or reduce the problem of the wireless ue that the connection or the call is interrupted is a problem to be solved in the industry.
The present specification provides an embodiment of a control circuit of a wireless user equipment, configured to control the wireless user equipment to actively retransmit radio resource control information to a communication station. The control circuit includes: an information generating circuit configured to generate a target rrc message to be transmitted to the communication station via a radio communication circuit of the wireless ue, wherein the target rrc message is a rrc message of a predetermined type; and a data control circuit, coupled to the information generating circuit, configured to transmit the target rrc message to the communication station via the wireless communication circuit, and to retransmit the target rrc message to the communication station via the wireless communication circuit at least once before the wireless communication circuit receives a negative acknowledgement message corresponding to the target rrc message generated by the communication station.
One of the advantages of the above embodiments is that the wireless communication circuit actively attempts to retransmit the target rrc message to the communication station before receiving the nack message corresponding to the target rrc message, so as to improve the chance of the communication station receiving the target rrc message successfully, thereby avoiding delaying the time for the communication station to receive the specific rrc message.
Other advantages of the present invention will be explained in more detail by the following description and drawings.
Drawings
Fig. 1 is a simplified schematic diagram of a mobile communication system according to an embodiment of the present invention.
Fig. 2 is a simplified flowchart of a method for actively retransmitting rrc message according to an embodiment of the present invention.
Detailed Description
The embodiments of the present invention will be described with reference to the accompanying drawings. In the drawings, like reference numerals designate identical or similar components or process flows.
Fig. 1 is a simplified schematic diagram of a mobile communication system 100 according to an embodiment of the present invention. The mobile communication system 100 includes a plurality of communication stations (communication stations) and a plurality of wireless user equipments. For convenience of illustration, fig. 1 only shows a communication station 110 and a wireless user equipment 120 as an example. As shown in fig. 1, the communication station 110 includes a transceiver circuit 111, a storage device 113, and a processor module 115. The wireless ue 120 includes a first wireless communication circuit 121, a second wireless communication circuit 122, a memory device 123, and a control circuit 124, wherein the control circuit 124 includes an information generating circuit (message generating circuit)125 and a data control circuit (data control circuit) 126. The architecture of other communication stations and wireless ues in the mobile communication system 100 is similar to the communication station 110 and the wireless ue 120 described above.
In the communication station 110, the transceiver circuit 111 is arranged to transmit signals using a first Radio Access Technology (RAT). The storage device 113 is arranged to store data required for the operation of the communication station 110. The processor module 115 is coupled to the transceiving circuit 111 and the storage device 113, and configured to control operations of the transceiving circuit 111 and the storage device 113.
In the wireless user equipment 120, the first wireless communication circuit 121 is arranged to communicate with the transceiving circuit 111 of the communication station 110 using the first radio access technology. The second wireless communication circuit 122 is configured to communicate with one or more Access Points (APs) (not shown in fig. 1) using a second radio access technology different from the first radio access technology. The memory device 123 is configured to store data received by the first wireless communication circuit 121 and the second wireless communication circuit 122, and store a target message queue (target message queue)128 and a common message queue (common message queue) 129. The control circuit 124 is coupled to the first wireless communication circuit 121, the second wireless communication circuit 122, and the memory device 123. The control circuit 124 is configured to access data in the memory device 123 through a signal bus (signal bus)127, and control operations of the first wireless communication circuit 121, the second wireless communication circuit 122, and the memory device 123.
In practice, the transceiver circuit 111 and the first wireless communication circuit 121 may each include one or more antennas, one or more modulators/demodulators, one or more analog signal processing circuits, and/or one or more digital processing circuits that utilize the first radio access technology to communicate with other devices. The second wireless communication circuitry 122 may include one or more antennas, one or more modulators/demodulators, one or more analog signal processing circuits, and/or one or more digital processing circuits that communicate with other devices using the second radio access technology. Both the storage device 113 and the memory device 123 may be implemented using one or more volatile/non-volatile memory circuits, such as registers, hard disks, or flash memory devices. Both the processor module 115 and the control circuit 124 may be implemented using one or more microprocessors, one or more network processors, one or more digital signal processing circuits, and/or other suitable processing circuits.
In other words, the information generating circuit 125 and the data control circuit 126 in the control circuit 124 can be implemented by different circuits, respectively, or can be integrated into a single circuit.
For ease of illustration, other components and connections in the mobile communication system 100 are not shown in fig. 1.
As can be seen from the foregoing description, the wireless user equipment 120 can communicate with the communication station 110 using the first radio access technology and can communicate with the access point using the second radio access technology. In practice, the first radio access technology refers to one or more of Wireless Wide Area Network (WWAN) technology, Wireless Metropolitan Area Network (WMAN) technology, or other radio communication technologies suitable for a wide communication range, such as WiMAX, GSM, UMTS, HSPA, LTE-Advanced, or other 3GPP radio access technologies. The second radio access technology refers to one or more Wireless Local Area Network (WLAN) technologies, or other suitable wireless communication technologies with a smaller communication range than the first radio access technology, such as radio access technologies of the IEEE 802.11 series of technology standards.
For purposes of illustration, it is assumed that the first radio access technology refers to one of various 3GPP radio access technologies. In this case, the communication station 110 may be implemented by a 3GPP Base Station (BS), such as a Node B (Node B) or an Evolved Node B (Evolved Node B, abbreviated as eNodeB or eNB). In addition, the communication station 110 may be located at substantially the same location as one or more access points.
In operation, the control circuit 124 of the wireless ue 120 sequentially generates a plurality of rrc messages of various types, and stores the rrc messages in the memory device 123 for transmission to the communication station 110 at appropriate times.
After sending a specific rrc message to the communication station 110, the conventional wireless ue must wait until the communication station 110 sends a negative acknowledgement message corresponding to the specific rrc message before attempting to resend the specific rrc message to the communication station 110. As mentioned above, such conventional retransmission mechanisms often delay the time when the communication station 110 receives the specific rrc message, thereby causing a problem of disconnection or call interruption of conventional wireless ues.
In the mobile communication system 100 of the present invention, in order to avoid delaying the timing when the communication station 110 receives some important rrc message, the control circuit 124 controls the radio ue 120 to actively retransmit some important rrc message to the communication station 110, but does not wait until the corresponding nack message transmitted from the communication station 110 is retransmitted.
The method for the control circuit 124 to actively retransmit the rrc message by the wireless ue 120 will be further described with reference to fig. 2.
Fig. 2 is a simplified flowchart of a method for actively retransmitting rrc message according to an embodiment of the present invention. In the flowchart of fig. 2, the flow in the field to which a specific device belongs represents the flow performed by the specific device. For example, the portion of the field labeled "message generation circuit" represents the flow performed by message generation circuit 125; the portion of the field labeled "data control circuit" represents the flow performed by data control circuit 126.
In the process 202, the message generating circuit 125 in the control circuit 124 generates a plurality of RRC messages including a target RRC message (target RRC message) MSG _ T of a predetermined type in response to the variation of the quality of the signal channel, according to an indication of a certain communication station (possibly the communication station 110, and possibly other communication stations) in the mobile communication system 100, or in response to other requirements.
For the sake of convenience, it is assumed that the control circuit 124 generates other rrc messages than the predetermined type, such as a first rrc message MSG _ a, a second rrc message MSG _ B, etc., in addition to the target rrc message MSG _ T of the predetermined type in the flow 202.
In the process 204, the message generating circuit 125 in the control circuit 124 stores the rrc messages in the corresponding message queue according to the type of the rrc message.
In the process 204, the message generating circuit 125 determines what the message queue for storing a specific rrc message (e.g., the target rrc message MSG _ T, the first rrc message MSG _ a, or the second rrc message MSG _ B) is according to the type of the specific rrc message.
Generally, rrc information can be roughly divided into three categories: RRC connection reconfiguration complete information (hereinafter, referred to as RRC connection reconfiguration complete information), measurement report information including measurement report data, and RRC connection reconfiguration complete information and measurement report information.
In practice, the measurement report in the measurement report information may be an event trigger report (event trigger report) or a periodic report (periodic report). The aforementioned event-triggered reports may be one of the reports of type A1-A6, or one of the reports of type B1-B2. The periodic report may be an intra-frequency measurement report (intra-frequency measurement report), an inter-frequency measurement report (inter-frequency measurement report), or an inter-RAT measurement report (inter-RAT measurement report).
In this specification, the predetermined type of radio resource control information is exclusively used to refer to radio resource control information of relatively high importance.
In one embodiment, the information generating circuit 125 only classifies the RRC connection reconfiguration complete message as a predetermined type of RRC connection reconfiguration message. In this case, the predetermined type of target RRC message MSG _ T is an RRC connection reconfiguration complete message, and the first RRC message MSG _ a and the second RRC message MSG _ B are other RRC connection reconfiguration complete messages.
In another embodiment, the information generating circuit 125 only classifies the RRC connection reconfiguration complete message and the measurement report message as the predetermined type of RRC message. In this case, the predetermined type of the target RRC message MSG _ T is an RRC connection reconfiguration complete message or a measurement report message, and the first RRC message MSG _ a and the second RRC message MSG _ B are other RRC connection reconfiguration complete messages and measurement report messages.
In another embodiment, the information generating circuit 125 only classifies the RRC connection reconfiguration complete message and the measurement report message including the event triggered report into the predetermined type of RRC message. In this case, the predetermined type of the target RRC message MSG _ T is an RRC connection reconfiguration complete message or a measurement report message including an event-triggered report, and the first and second RRC messages MSG _ a and MSG _ B are radio resource control messages other than the RRC connection reconfiguration complete message and the measurement report message including the event-triggered report.
In the process 204, if the rrc message is a rrc message of a predetermined type, the message generating circuit 125 may store the rrc message in the target message queue 128 of the memory device 123. Otherwise, if the specific rrc message is not the predetermined type of rrc message, the message generating circuit 125 may store the specific rrc message in the general message queue 129 of the memory device 123. Therefore, the message generating circuit 125 stores the predetermined type of the target rrc message MSG _ T in the target message queue 128 and stores the first rrc message MSG _ a and the second rrc message MSG _ B which are not the predetermined type in the general message queue 129 in the flow 204.
In this way, the message ordering circuit 126 can quickly determine whether the specific rrc message is an important rrc message in the subsequent process according to the information queue of the specific rrc message.
In the process 206, the data control circuit 126 transmits the target rrc message MSG _ T and other rrc messages (e.g., the first rrc message MSG _ a) stored in the memory device 123 to the transceiver circuit 111 of the communication station 110 via the first wireless communication circuit 121.
Please note that, before the first wireless communication circuit 121 receives the Negative Acknowledgement (NACK) generated by the communication station 110 and corresponding to the target rrc _ T, the data control circuit 126 proceeds to the process 208 to retransmit the target rrc _ T to the communication station 110 via the first wireless communication circuit 121.
When the next information transmission opportunity occurs, the data control circuit 126 proceeds to the process 210 to determine whether the first wireless communication circuit 121 has received an Acknowledgement (ACK) generated by the communication station 110 and corresponding to the target rrc _ T. If the first radio communication circuit 121 has received the positive acknowledgement corresponding to the target rrc message MSG _ T, the data control circuit 126 determines that the target rrc message MSG _ T has been successfully received by the communication station 110. In this case, the data control circuit 126 proceeds to the process 212.
On the contrary, if the first radio communication circuit 121 has not received any positive acknowledgement corresponding to the target rrc message MSG _ T, the data control circuit 126 determines that the target rrc message MSG _ T has not been successfully received by the communication station 110. In this case, the data control circuit 126 proceeds to the process 214.
In the process 212, the data control circuit 126 removes the target rrc message MSG _ T from the corresponding target message queue 128.
In the process 214, the data control circuit 126 retransmits the target rrc message MSG _ T to the communication station 110 again through the first wireless communication circuit 121.
In the process 214, if the bearer field (payload) of a Protocol Data Unit (PDU) to be transmitted to the communication station 110 at the time has a sufficient size, the data control circuit 126 may fill at least a portion of other rrc information (e.g., the second rrc information MSG _ B) stored in the general information queue 129 and the target rrc information MSG _ T stored in the target information queue 128 into the same PDU to be transmitted to the communication station 110, so as to be transmitted to the communication station 110 through the first radio communication circuit 121.
On the contrary, if the size of the bearer field of the protocol data unit to be transmitted to the communication station 110 at that time is not enough to accommodate all the data of the target rrc _ T, the data control circuit 126 may segment the target rrc _ T into a plurality of data segments and fill the plurality of data segments into the plurality of protocol data units to be transmitted to the communication station 110, respectively, for being sequentially transmitted to the communication station 110 through the first wireless communication circuit 121.
In practice, before the first wireless communication circuit 121 receives the negative acknowledgement information corresponding to the target wireless resource control information MSG _ T, the data control circuit 126 may retransmit the target wireless resource control information MSG _ T to the communication station 110 by the first wireless communication circuit 121 one or more times until the first wireless communication circuit 121 receives the positive Acknowledgement (ACK) information corresponding to the target wireless resource control information MSG _ T generated by the communication station 110.
As can be seen from the foregoing description, before the wireless ue 120 receives the negative acknowledgement generated by the communication station 110 and corresponding to the target rrc message MSG _ T, the data control circuit 126 controls the wireless ue 120 to actively retransmit the target rrc message MSG _ T to the communication station 110 at least once, so as to effectively improve the opportunity for the communication station 110 to successfully receive the target rrc message MSG _ T. In addition, since the wireless ue 120 does not need to wait for the negative acknowledgement and then retransmits the target rrc message MSG _ T in advance, it is able to effectively avoid delaying the time when the communication station 110 receives the target rrc message MSG _ T, thereby greatly reducing the possibility of the wireless ue 120 from the disconnection or the call disconnection.
Please note that the execution sequence of the process in fig. 2 is only an exemplary embodiment and is not limited to the actual implementation of the present invention. For example, the processes 202 and 204 may be performed simultaneously.
In addition, in some embodiments, the data control circuit 126 only retransmits the target rrc message MSG _ T to the communication station 110 before the first radio communication circuit 121 receives the negative acknowledgement message corresponding to the target rrc message MSG _ T if the transmission quality of the signal between the first radio communication circuit 121 and the communication station 110 is lower than a predetermined level, and the aforementioned active retransmission operation can be omitted if the transmission quality of the signal between the first radio communication circuit 121 and the communication station 110 is higher than the predetermined level, so as to save the power consumption of the wireless ue 120.
Certain terms are used throughout the description and claims to refer to particular components. However, it will be understood by those skilled in the art that the same elements may be referred to by different names. The specification and claims do not intend to distinguish between components that differ in name but not function. In the description and claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. Also, the term "coupled" as used herein includes any direct or indirect connection. Therefore, if the first element is coupled to the second element, it means that the first element can be directly connected to the second element through electrical connection or signal connection such as wireless transmission, optical transmission, etc., or indirectly connected to the second element through other elements or connection means.
As used herein, the description of "and/or" includes any combination of one or more of the items listed. In addition, any reference to singular is intended to include the plural unless the specification specifically states otherwise.
It should be understood, however, that the detailed description and specific examples, while indicating preferred embodiments of the invention, are given by way of illustration only, since various changes and modifications within the spirit and scope of the invention will become apparent to those skilled in the art from this detailed description.
[ notation ] to show
100 mobile communication system
110 communication station
111 transceiver circuit
113 storage device
115 processor module
120 wireless user equipment
121 first wireless communication circuit
122 second wireless communication circuit
123 memory device
124 control circuit
125 information generating circuit
126 data control circuit
127 signal bus
128 object information queue
129 general information queue.
Claims (7)
1. A control apparatus of a wireless user equipment for controlling the wireless user equipment to actively retransmit rrc message to a communication station, the control apparatus comprising:
an information generating circuit configured to generate a target rrc message to be transmitted to the communication station via a radio communication circuit of the wireless ue, wherein the target rrc message is a rrc message of a predetermined type; and
a data control circuit, coupled to the information generating circuit, configured to transmit the target rrc message to the communication station via the wireless communication circuit, and to retransmit the target rrc message to the communication station via the wireless communication circuit at least once again before the wireless communication circuit receives a negative acknowledgement message corresponding to the target rrc message generated by the communication station,
the information generating circuit stores the target radio resource control information in a target information queue for the data control circuit to read the target radio resource control information from the target information queue, and the information generating circuit is further configured to generate a first radio resource control information to be transmitted to the communication station through the wireless communication circuit; and is
Wherein if the first rrc message is not the rrc message of the predetermined type, the message generating circuit stores the first rrc message in a general message queue different from the target message queue for the data control circuit to read the first rrc message from the general message queue,
wherein the data control circuit retransmits the target rrc message to the communication station before the wireless communication circuit receives the nack message only if the quality of signal transmission between the wireless communication circuit and the communication station is below a predetermined level.
2. The control device as claimed in claim 1, wherein the data control circuit retransmits the target rrc message to the communication station at least once more through the wireless communication circuit before the wireless communication circuit receives the nack message until the wireless communication circuit receives an ack message corresponding to the target rrc message generated by the communication station.
3. The control apparatus of claim 1 wherein the data control circuitry is configured to stuff at least a portion of a second rrc message with the target rrc message into a same pdu to be transmitted to the communication station.
4. The control device of claim 1, wherein the data control circuit segments the target rrc message into a plurality of data segments and fills the plurality of data segments into a plurality of pdu's to be transmitted to the communication station, respectively.
5. The apparatus of claim 1, wherein the target RRC message is an RRC connection reconfiguration complete message, and the first RRC message is other RRC message except the RRC connection reconfiguration complete message.
6. The control apparatus of claim 1, wherein the target RRC message is an RRC connection reconfiguration complete message or a measurement report message, and the first RRC message is other RRC message except the RRC connection reconfiguration complete message and the measurement report message.
7. The control apparatus of claim 1, wherein the target RRC message is an RRC connection reconfiguration complete message or a measurement report message including an event-triggered report, and the first RRC message is other RRC messages except the RRC connection reconfiguration complete message and the measurement report message including the event-triggered report.
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| CN101072236A (en) * | 2006-05-10 | 2007-11-14 | 华硕电脑股份有限公司 | Method and apparatus for setting ciphering activation time in a wireless communications system |
| CN101132261A (en) * | 2006-08-21 | 2008-02-27 | 华为技术有限公司 | Data package retransmission method and system thereof |
| CN101222479B (en) * | 2007-01-09 | 2011-04-20 | 中兴通讯股份有限公司 | Method for implementing wireless links control layer with active retransmission and period answer |
| EP2378671A4 (en) * | 2008-12-12 | 2015-12-30 | Alcatel Lucent | Frame aggregating method in mobile communication system |
| CN106134526B (en) * | 2010-11-30 | 2014-02-19 | 北京遥测技术研究所 | A kind of MicroBlaze of utilization realizes the optimization method of gigabit networking transmission |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103516495A (en) * | 2012-06-28 | 2014-01-15 | 中兴通讯股份有限公司 | Downlink adaptive modulating and coding method and device |
| CN104038971A (en) * | 2013-03-06 | 2014-09-10 | 电信科学技术研究院 | Link switching method and link switching device |
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