TW200304747A - Scheme to discard an erroneous PDU received in a wireless communication system - Google Patents

Abstract

The present invention provides a method for specifying actions that a receiver takes upon receiving an AM or UM PDU with an error indication. Currently, for RLC acknowledged mode (AM) and unacknowledged mode (UM), upon receiving an AM or UM PDU with an error indication, actions that the receiver takes are not specified. Inappropriate actions that the receiver takes can cause serious problems. For example, unnecessary reset procedures are initiated, unnecessary retransmissions are made, data is lost, or synchronization between the sender and receiver can be lost. In an embodiment of the present invention, for RLC AM, upon receiving an AM PDU with an error indication, the receiver discards this PDU. In another embodiment of the present invention, for RLC UM, upon receiving an UM PDU with an error indication, the receiver discards this PDU. In another embodiment, MAC discards a MAC SDU that is to be delivered to an AM or a UM RLC entity, if an error indication for this SDU has been received from the lower layer. As a result, radio resources are not wasted, unnecessary retransmissions are avoided, synchronization is maintained, and data loss is prevented. Therefore, by utilizing the present invention, wireless communication system performance is improved.

Description

200304747

[Technical field to which the invention belongs] The signatures are related to wireless communication protocols. In particular—a method of taking appropriate action when the receiving device rnvn w * response mode (AM) or non-response mode (UM) j protocol data unit (pDU) with an error indication. [Previous Technology] In view of the fact that wireless communication has gradually become a common communication method and its corresponding ... line service demand has also continued to be & the improvement of wireless communication systems has long been valued and demanded by relevant industries. However, the communication system of the project is limited to the use of a fixed channel or frequency according to its relevant regulations or its practical technical limits. Therefore, in order to increase the capacity of its wireless communication system under the limited source, the larger bandwidth allocated to the system or the communication system is used more efficiently, or it is limited by the actual frequency range. And physical limitations, there are more and more research methods or methods that are used to improve or improve the efficiency of wireless communication systems The waste of system resources caused by repeated transmission is here. The present invention discloses a method for improving the performance of a wireless communication system by effectively handling system errors. [Summary of the Invention] The main purpose of the present invention is to disclose a protocol data unit (Acknowledged Mode (AM) or Unacknowledged Mode (UM) with an error indication when a receiving device receives a clip.

200304747 V. Description of Invention (2)

Protocol Data Unit (PDU), appropriate actions can be made, thereby improving the performance of the wireless communication system to effectively address the shortcomings in the conventional techniques described above. When a service data unit of a media access control device is transmitted to a radio wave connection control device If the error indication for a service data unit has been received by its low-level module, the error indication relative to this service data unit will also be transmitted to its radio wave connection control device. In addition, from the non-transmission mode of the radio wave connection control device (τranspa factory en 7 μ 〇de, T M), it is seen that when a protocol data with an error indication transmitted from the media access control device is received, The incorrect service data is set as the control device. If the "wrong radio wave module is provided for a pair of transmissions", the service information data sheet is in the learning or non-response device. The monthly service service data is connected to the control and / or the corresponding error is set to the mode information of the transmission technology model of the material unit (Transparent, the receiving device is based on the delivery (Delivery 〇f 'Only received has not received The data unit will be transmitted to the material unit for delivery. The service data sheet of the device is set for each received error indication. Otherwise, if "do not check", all non-existent data will be transmitted to its higher order. The setting is usually Delegate China's response to the non-response model and

Mode Data (TMD) program operation; if "wrong Erroneous SDUs", the wrong radio wave is connected to its high-order module. In addition, if it is determined as "Yes", all the units are then transmitted to the high-level faulty service data unit and the faulty service data unit by the radio wave connection control device module. This "wrongly specified by the south-level module. The response mode of the error indication is not controlled by the wireless v radio wave connection control."

200304747 Five types of commensurate adaptations are necessary. (3) Operation similar to if radio wave connection control device through mode. : Upper 2 receivers also often take their inappropriate actions ::: Re: ask the stomach, for example, unnecessary reset procedures, no input, data loss, or missing transmitter and receiver steps. There are serious questions about this, such as data loss; repeated transmissions that are out of sync are often inappropriate actions taken by the receiver '. This is also the reason for the receiver to efficiently take processing actions to take appropriate actions and The improvement method of improving the performance of the wireless communication system is not only a method of transmitting the necessary transmission or avoiding a response mode that does not respond accordingly. It has also been maintained in the present invention. In order to make the present invention, the following is enumerated: Implementation Modes > The preferred embodiment refers to the first. The present invention provides a system performance when the receiver receives a non-response protocol data unit in order to eliminate the synchronization that prevents radio wave resources from being transmitted and prevents leakage of data. The above-mentioned objects, features, and advantages of the present invention are described in detail in conjunction with the accompanying drawings. When the wrong fingers are included, the appropriate embodiments can be wasted, the same mistakes can be made, and can be more clearly explained. The present invention is illustrated in the following preferred embodiments. The figure shows a radio wave connection control device.

Page 6 200304747 V. Description of Invention (4) Arrangement illustration. When a media access control device is connected to the control device by radio waves, if it is received from its low-level module, it is then sent to the radio mode of its radio wave connection control device. The pass-through device then according to the following procedure of the present invention, if "the error service data unit is only received without error, the wireless unit will be transmitted to its high-level module" is set to "yes", then the service data unit is then If it is transmitted to its high-level received service data unit, if "wrong service data unit 'all radio wave connection controls are installed on its high-level module. This" error is usually assigned by the high-level module. The unit is passed to an error indication without the service data unit. The error indication of the service data unit is then connected to the device. When the radio wave connection is controlled to the protocol data unit of the mode transmitted by the media access control device, the receiving sequence action "Transfer" is set to "No", then the radio wave connection controls the service data of Pei Zhi. If "the wrong service data unit is transmitted to the service module of the radio wave connection control device, and / or a corresponding error indication is provided for each connection. No delivery" is set to "No check". The service data unit will be transmitted by the service data unit. ”This radio wave connection control device usually maintains at least the following state variables at the time of transmission; VT (S) is a transmission state variable, including the next first-person being The ordinal number (seQuence number, SN) of the agreed data unit of the transmitted response mode. VT (A) is a response state variable that contains the last ordinal number of the protocol data unit in the last in-sequence acknowledged response mode agreement.

Page 7 200304747 V. Description of the invention (5) One by one: The wave coupling device maintains at least the following state variables during reception. VR (US) is a receiving state variable, including the next ordinal number of the ordinal number of the contract data unit in the non-response mode. In the conventional art, for the responsive and non-response modes of the radio wave connection control device, When the receiver receives a protocol data unit with a response mode or a non-response mode with an error indicating g, the receiver cannot make a movement similar to the transparent mode of the radio wave connection control device described above. -Improper actions taken as described above are more likely to cause serious problems. 0 To clearly illustrate the advancement of the present invention, the following specifically illustrates several examples of problems that may occur using conventional techniques. First of all, consider that when the radio wave connection control receiver receives from the media access controller a protocol number, unit of a response mode with an error indication, the protocol data unit of this response mode is a status protocol data element. (STATUS PDU) 'Contains an acknowledgement super-field (ACK SUFI), and this field contains an incorrect last sequence number (LSN) of 100 (the correct LSN is 90). 〇 If this last ordinal number falls outside the [VT (A), VT (S)] interval, an unnecessary reset procedure will be started, resulting in a waste of radio wave resources. If this last ordinal number falls within the [VT (A), VT (S)] interval. Protocol data units with an ordinal number between 90 and 99 are lost forever. Due to this error, the last ordinal number confirms the receipt of the protocol data units of all response modes with ordinal numbers less than 100, and the transmitter considers all the protocol data with ordinal numbers less than 100.

Page 8 200304747 V. Description of the invention The unit is correctly received by the receiver and moves its transmission window accordingly. Then, since the receiver does not actually receive the protocol data unit with the sequence number 90 to 99, the receiver transmits a status protocol data unit, thereby requesting the transmitter to resend the protocol data unit with the sequence.序 The required ordinal number is initiated after the unnecessary reset procedure of the transmission, resulting in the

Secondly, consider when the radio wave connection control receiver receives from the media access control device an agreed data unit with a response mode with an error indication. The agreement data unit of this response mode is a status agreement data unit, which contains a bit map superbit (BITMAP SUFI) with an error bit map (BITMAP) of 100 1 100. The correct bitmap is 10111011. This error occurs only for bitmap stops. If the first sequence number (FSN) is 0, according to the bitmap of this error? The protocol data units with ordinal numbers 1, 5, 6, 6 and 7 will be retransmitted. However, the contracted data units with ordinal numbers 2, 6, and 7 were originally received correctly. Therefore, due to repeated transmission, radio wave resources are wasted. Third, consider when the radio wave connection control receiver receives an unacknowledged mode data (UMD) protocol data unit transmitted from the media access control device with an error indication. This error only occurs in the ordinal block of the header of the data protocol data unit received in non-response mode. VR (US) is 100 and the error ordinal is 110. The correct ordinal is ιοί. The receiver updates VR (US) to Ul based on this wrong ordinal. When the receiver receives the next agreement data unit with an ordinal number of 102, it receives

Page 9 200304747 V. Description of the invention (7) The device S is to increase the Hyper Frame Number (HFN) by 1 if the ordinal is in the next ordinal period. In fact, the ordinal number is in the correct ordinal period. Therefore, the HFN between the transmitter and the receiver may be out of sync, so that the received protocol data unit with an ordinal number greater than or equal to 〇2 cannot be correctly decrypted. As far as the conventional technology is concerned, there is no technology to solve the problem of the non-response mode of the HFN connected to the control device of the radio wave.

^ Regarding the above-mentioned serious problems, such as data loss and synchronization loss # It is unnecessary that repeated transmissions will occur when the receiver takes inappropriate actions; therefore, an improved method disclosed by the present invention does allow the receiving device Take processing actions efficiently to avoid inappropriate actions and improve the performance of wireless systems. …, Green ^ # & = As mentioned above, the present invention provides a method for acting even when the receiver receives an agreement data unit with a response mode or a non-response mode with a dream mode. Therefore, radio wave resources will not be wasted, and it will prevent leakage of information. Therefore, the performance of the system is improved i 5 ^ This issue date + month, when receiving the central zone error indication #response ^ Data unit response to the radio wave connection control device =. . The radio wave connection control receiving device removes this agreement data sheet ^ In the present invention, when the data unit is agreed, when the radio wave is received with an error, it means that the radio wave connection control connection control receiving device is not The non-response mode of the response mode device removes this agreement data sheet 200304747

The error indication is even ... f A service data sheet of a media access control device is passed to a library M = the module is received and this service data unit will be media access control; wireless connection in response mode The control device continues to refer to I to remove this service data unit. From the media: fetch control = set: m-wave connection control receiving device receives the protocol data unit. : J comes, the data unit with the error indication-response mode j contains the agreement data unit of the right ° α mode is a status agreement stop (ACK 'Γ) ^ the last response of the error (LSN) is 100 Super on jUM). The correct LSN is 90. In the conventional art, if the last ordinal number falls outside of [VT (A), wire, and I2 :, unnecessary resetting procedures will be started, resulting in waste of Chen Dian and Bei Yuan.

MU ^ ’In the conventional art, if the final ordinal number falls within [VT (A), VT wave it. Ordinal numbers) Agreement data units between 90 and 99 will always be described as the last ordinal number of this error. Confirm the receipt of all agreement data units whose ordinal numbers are less than 100. The transmitter considers all agreements with ordinal numbers less than _ The data unit is correctly received by the receiver, and the transmission window of the dagger is moved accordingly. Then, since the receiver does not actually receive the agreement data unit of the sequence number 90 ^ 99, the receiver transmits a status agreement number ί 'to request the transmitter to retransmit the agreement data unit whose sequence number is 90 to 99. Because the required ordinal occurs outside the transmission window, unnecessary resetting procedures are still initiated, resulting in unnecessary waste of radio wave resources.

200304747 Received a radio wave connection control receiving device with an error indication. Unnecessary reset procedures can be used to avoid the problem. However, by using the present invention, when the agreement data unit of the mode is responded, the agreement data unit is not removed. Therefore, free and save radio wave resources and improve efficiency

Continuing to refer to the above second example, when the radio wave connection control receiver receives a protocol data unit with a response mode containing an error indication from the media access control device. The agreement data unit of this response mode is a status agreement data unit, which includes a bit map superbit (BITMAP SUFI) with an error bit map (BITMAp) of 1 00 1 1 000. The correct bitmap is 1 0 11 1 0 1 1. This error only occurs in the bitmap range. If the first ordinal number (FSN) is 0, according to the bitmap of this error? , The protocol data units whose ordinal numbers are i, 2, 5, 6, and 7 will be retransmitted. However, the agreement data units of agreement data units 2, 6, and 7 were originally transmitted correctly. Therefore, due to this repeated transmission relationship, radio wave resources are wasted.

However, by using the present invention, when a contract data unit with an error indication = response mode is received, the receiving device removes the contract data unit. Therefore, repeated transmission of unnecessary protocol data units can avoid and save its radio wave resources and improve its efficiency. Referring to the third example above, when the radio wave connection control receiver receives a protocol data unit with a non-response mode data containing an error indication from the media access control device. This error only occurs in the ordinal block of the header of the received non-response mode data protocol data unit. Vr (Us) is 100 and the error ordinal is 110. The correct ordinal number is 101. The receiver updates VR (US) to 111 based on its error sequence number. When the receiver receives the next agreement with an ordinal number of 102

Page 12 200304747 V. Description of the invention (Data) --- The data unit. The receiver considers that the ordinal number is in the next ordinal period and increases the frame number by 1. In fact, the ordinal number is in the correct ordinal period. Therefore, the HFN between the transmitter and the receiver will be out of sync, so that the protocol data units whose reception order is greater than or equal to 102 cannot be correctly encrypted. As far as the conventional technology is concerned, there is no technology to solve the non-synchronization of the non-response mode of the HFN connected to the control device of the radio wave. However, by using the present invention, when a non-response mode agreement data unit is received with an error indication, the receiving device removes the agreement data unit. π Repeatedly, in the present invention, if the service data unit of a media access control device is received from a low-level module and carries its error indication, if the service data unit is passed to a response mode or non-response Mode wireless connection control device, the media access control device removes 5 units of this service, and also avoids unnecessary transmission of repeated data of the protocol unit and avoids loss of synchronization. Therefore, using the present invention saves radio wave sources and improves efficiency. As described above, the present invention provides an improved method for the receiving device to take effective processing actions to avoid inappropriate actions and improve the performance of the wireless communication system. In this regard, the present invention provides a method by which the receiver can take appropriate action when it receives an agreement data unit with a response mode or a non-response mode with an error indication. Therefore, radio wave resources are not wasted, synchronization is maintained, and data leakage is prevented. Therefore, the performance of the system is improved.

Page 13 200304747

Page 14 200304747 Simple description of 圊 style The first picture is an explanatory diagram of the arrangement of the radio wave connection control device.

Claims (1)

200304747 VI. Scope of patent application 2 • A type of data reception is received in a wireless communication device. Please remove the scope and indicate the receiving device, the agreement, the receiving device, such as a patent application, and the error indicating device. 3 · —This kind of receiver is installed in a non-receiving device. 4．If the patent is applied, the error refers to a media store. A method for error handling in a service data control system as claimed in the patent, including a protocol data unit to a response mode, wherein the element is accompanied by an error indication; and, the protocol data unit. The method for error handling described in item 1, wherein the protocol data unit is from a media access control line communication device to receive the fixed data, and the request range indication and the control line communication access control service number access control request range data are removed. Unit 0 Please set the range according to the unit. The method of error handling in the system includes a contract data unit of a response mode, an error indication; and a unit. The method of error handling described above, where the agreement data unit is from a non-response unit accompanied by agreement data item 3 in the non-response mode device. Error in the system. Device reception. Data removal in the unit. Item 5 is the method of narrow processing, which includes: · To an error indication, this error indication is wrong; and the service data unit. The method of error handling described above, wherein the radio link to a response mode The method of error handling described in item 5, wherein is transmitted to a radio link in a non-response mode 200304747 VI, 8 9 10 11 Scope of patent application • The error handling method described in item 5 of the scope of patent application, the error indication is received from a low-level module. The error handling method used in the wireless communication system is as follows:-The receiving device receives the-agreement data unit, where the early element is accompanied by an error indication. Cooperative data except the heart = element. =: Fixed number; = processing method, in which the association error is a non-response mode agreement data unit. ,in