TWI426806B - Systems and methods for indicating radio link failure - Google Patents
Systems and methods for indicating radio link failure Download PDFInfo
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Description
本發明主要關於無線通訊之無線連結失效(Radio Link Failure，RLF)管控技術，特別係適用於行動通訊裝置之無線連結失效之回報技術。The invention relates to a radio link failure (RLF) control technology for wireless communication, in particular to a return technology for wireless link failure of a mobile communication device.
行動通訊系統越來越被廣泛使用，其能夠以不受限於使用者位置的方式提供各式通訊服務，例如：語音服務、資料服務、以及視訊服務。一般的行動通訊系統可為多重存取系統，意即可同時供多位使用者存取該系統並配置適當之無線網路資源給使用者，而其所使用的多重存取技術包括有：1x分碼多重存取2000(1x Code Division Multiple Access-2000)技術、1x演進資料優化(1x Evolution-Data Optimized，1x EVDO)技術、正交分頻多工(Orthogonal Frequency Division Multiplexing，OFDM)技術、以及長期演進(Long Term Evolution，LTE)技術等等。而為了取得無線網路資源，使用者之行動通訊裝置(或稱使用者裝置(User Equipment))必須執行特定之連線程序以連接上至少一行動服務節點，透過該連線程序，該行動通訊裝置可獲得行動服務節點所配置之上行通道與下行通道(或通稱為一無線連結)，以與行動服務節點進行通訊。然而，上述通道或無線連結之訊號品質可能會因為某些情況而過度衰減，造成無線連結失效，舉例來說，當行動通訊裝置離開了原行動服務節點的訊號涵蓋範圍，且進入一個沒有任何行動服務節點之區域(例如：進入隧道或地下室)時，就會造成無線連結失效。Mobile communication systems are becoming more widely used, providing a variety of communication services, such as voice services, data services, and video services, in a manner that is not restricted to the user's location. A general mobile communication system can be a multiple access system, which means that multiple users can simultaneously access the system and configure appropriate wireless network resources for the user, and the multiple access technologies used include: 1x Codex Multiple Access 2000 (1x Code Division Multiple Access-2000) technology, 1x Evolution-Data Optimized (1x EVDO) technology, Orthogonal Frequency Division Multiplexing (OFDM) technology, and Long Term Evolution (LTE) technology and so on. In order to obtain wireless network resources, the user's mobile communication device (or user equipment) must perform a specific connection procedure to connect at least one mobile service node through the connection procedure. The device may obtain an uplink channel and a downlink channel (or commonly referred to as a wireless link) configured by the mobile service node to communicate with the mobile service node. However, the signal quality of the above channel or wireless link may be excessively attenuated due to some conditions, causing the wireless link to fail. For example, when the mobile communication device leaves the signal coverage of the original mobile service node, and enters one without any action. The area of the service node (for example, entering a tunnel or basement) will cause the wireless link to fail.
以第8版(Release 8)的長期演進系統為例，當發生無線連結失效時，行動通訊裝置的處理方式如第1圖所示。首先，當實體層(Physical Layer)偵測到無線連結訊號之訊號對干擾雜訊比(Signal to Interference and Noise Ratio，SINR)低於一特定門檻值時，會發出不同步(out of sync)指示通知上層，當上層接收到一預定數量(在圖中標示為N310)之不同步指示時，則啟動一特定長度(在圖中標示為T310)之計時器T1。如果在計時器T1屆期(expire)以前都沒有收到實體層所回報的同步(in sync)指示，則上層據此判定發生了無線連結失效；反之，如果在計時器T1屆期以前收到實體層所回報的同步指示，則上層恢復原來正常的運作。當判定發生了無線連結失效時，上層會再啟動另一計時器T2，進入第二階段的等待恢復程序，直到計時器T2屆期前如果沒有收到同步指示，則上層執行連結釋放程序並從原來的連接模式(在圖中標示為RRC_CONNECTED)進入閒置模式(在圖中標示為RRC_IDLE)。Taking the Long Term Evolution system of Release 8 as an example, when a wireless connection fails, the processing method of the mobile communication device is as shown in FIG. First, when the physical layer detects that the signal to interference and noise ratio (SINR) of the wireless link signal is below a certain threshold, an out of sync indication is issued. The upper layer is notified that when the upper layer receives an unsynchronized indication of a predetermined number (indicated as N310 in the figure), a timer T1 of a specific length (labeled T310 in the figure) is started. If the in sync indication returned by the physical layer is not received before the timer T1 expires, the upper layer determines that the wireless connection has failed; otherwise, if it is received before the timer T1 expires The synchronization indication returned by the physical layer restores the normal operation of the upper layer. When it is determined that the wireless link failure occurs, the upper layer restarts another timer T2 and enters the second stage waiting for recovery procedure until the timer T2 expires before receiving the synchronization indication, and the upper layer performs the link release procedure and The original connection mode (labeled RRC_CONNECTED in the figure) enters the idle mode (labeled RRC_IDLE in the figure).
第2圖係顯示使用多重載波之長期演進系統中的無線連結失效之示意圖。在該系統中，行動通訊裝置21係透過5個下行(downlink)的分量載波(Component Carrier)從進化式基地台(evolved Node-B，eNB)22接收訊號以及其所乘載之資料，其中，不同的分量載波可用以載送不同的通訊資料、亦可用以載送相同的通訊資料，舉例來說，分量載波0可載送語音資料、分量載波1與分量載波2可載送檔案傳輸協定(File Transfer Protocol，FTP)資料、分量載波3與分量載波4可載送視訊資料；或者也可以是分量載波0、分量載波1、分量載波2、分量載波3與分量載波4同時都用來載送語音資料、檔案傳輸資料和視訊資料。需注意的是，在這個例子中，由於分量載波4發生無線連結失效，所以行動通訊裝置21無法接收到分量載波4所載送之資料，然而，因為進化式基地台22無法偵測到分量載波4已發生了無線連結失效，所以會持續透過分量載波4繼續傳送資料。所以容易造成網路資源的浪費，也會使得在分量載波4所載送之資料無法順利傳送到行動通訊裝置21。Figure 2 is a diagram showing the failure of a wireless link in a long term evolution system using multiple carriers. In the system, the mobile communication device 21 receives signals from the evolved Node-B (eNB) 22 and the data carried by the evolved Node-B (eNB) through five downlink component carriers. Different component carriers can be used to carry different communication data and can also carry the same communication data. For example, component carrier 0 can carry voice data, component carrier 1 and component carrier 2 can carry file transmission protocol ( File Transfer Protocol (FTP) data, component carrier 3 and component carrier 4 may carry video data; or component carrier 0, component carrier 1, component carrier 2, component carrier 3 and component carrier 4 may be simultaneously carried Voice data, file transfer data and video data. It should be noted that in this example, the mobile communication device 21 cannot receive the data carried by the component carrier 4 due to the wireless link failure of the component carrier 4, however, because the evolved base station 22 cannot detect the component carrier. 4 The wireless link has failed, so the data will continue to be transmitted through the component carrier 4. Therefore, it is easy to cause waste of network resources, and the data carried on the component carrier 4 cannot be smoothly transmitted to the mobile communication device 21.
根據本發明之一實施例提供了一種行動通訊裝置，包括一無線模組與一控制模組。上述無線模組接收來自一行動服務節點之複數個下行訊號，並決定上述下行訊號之複數個狀態指標。上述控制模組根據上述狀態指標決定是否發生一無線連結失效，若是，則透過上述無線模組傳送至少一上行訊號向上述行動服務節點回報關於上述無線連結失效之資訊。According to an embodiment of the invention, a mobile communication device includes a wireless module and a control module. The wireless module receives a plurality of downlink signals from a mobile service node and determines a plurality of status indicators of the downlink signals. The control module determines whether a wireless connection failure occurs according to the status indicator. If yes, the wireless module transmits at least one uplink signal to the mobile service node to report information about the wireless connection failure.
本發明之另一實施例提供了一種回報無線連結失效之方法，適用於支援多重載波技術之一行動通訊裝置，上述回報無線連結失效之方法包括以下步驟：接收來自一行動服務節點之複數個下行訊號；決定上述下行訊號之複數個狀態指標；根據上述狀態指標決定是否發生一無線連結失效；以及若是，則傳送至少一上行訊號向上述行動服務節點回報關於上述無線連結失效之資訊。Another embodiment of the present invention provides a method for reporting a wireless link failure, which is suitable for supporting a mobile communication device of a multi-carrier technology. The method for reporting a wireless link failure includes the following steps: receiving a plurality of downlinks from a mobile service node a plurality of status indicators for determining the downlink signal; determining whether a wireless link failure occurs according to the status indicator; and if yes, transmitting at least one uplink signal to the mobile service node to report information about the wireless link failure.
關於本發明其他附加的特徵與優點，此領域之熟習技術人士，在不脫離本發明之精神和範圍內，當可根據本案實施方法中所揭露之行動通訊裝置、以及回報無線連結失效之方法，做些許的更動與潤飾而得到。With regard to other additional features and advantages of the present invention, those skilled in the art, without departing from the spirit and scope of the present invention, may be able to use the mobile communication device disclosed in the method of the present invention and the method for reporting the failure of the wireless connection. Make a little change and retouch.
本章節所敘述的是實施本發明之最佳方式，目的在於說明本發明之精神而非用以限定本發明之保護範圍，本發明之保護範圍當視後附之申請專利範圍所界定者為準。The present invention is described in the following paragraphs, and is intended to be illustrative of the present invention, and is intended to be illustrative of the scope of the invention, and the scope of the present invention is defined by the scope of the appended claims. .
本發明提供了一種回報無線連結失效之方法，適用於支援多重載波技術之行動通訊裝置，使行動通訊裝置在偵測到無線連結失效時，可機動地向行動服務節點回報以利網路資源之有效運用。第3圖係根據本發明一實施例所述之行動通訊裝置之示意圖。行動通訊裝置300包括無線模組310與控制模組320，無線模組310係提供與行動服務節點30之間進行無線通訊，明確來說，係接收來自行動服務節點30之下行訊號並進一步決定下行訊號之狀態指標。控制模組320則根據下行訊號之狀態指標決定是否發生無線連結失效，若是，則透過無線模組310傳送上行訊號向行動服務節點30回報關於無線連結失效之資訊。在一實施例中，該狀態指標可為訊號對干擾雜訊比，當訊號對干擾雜訊比低於一特定門檻值時，無線模組310可發出不同步指示通知控制模組320，而控制模組320則可根據不同步指示決定是否發生無線連結失效。進一步說明，上述下行訊號係分別載送於複數個分量載波，控制模組320可根據下行訊號之狀態指標決定無線連結失效係發生於哪個或哪些分量載波，也就是說，無線連結失效之資訊可指示出發生無線連結失效的分量載波。而後，控制模組320可進一步指示無線模組310停止監控(monitor)發生無線連結失效的分量載波，以節省不必要之電力消耗。同時，行動服務節點30在接收到上述上行訊號時，則可根據上行訊號決定無線連結失效之資訊，並據以停止該分量載波之運作，而將後續欲傳送之資料改由其它運作正常之分量載波進行傳送。The invention provides a method for reporting wireless link failure, which is suitable for a mobile communication device supporting multi-carrier technology, so that the mobile communication device can report back to the mobile service node to benefit the network resource when detecting the wireless connection failure. Effective use. FIG. 3 is a schematic diagram of a mobile communication device according to an embodiment of the invention. The mobile communication device 300 includes a wireless module 310 and a control module 320. The wireless module 310 provides wireless communication with the mobile service node 30. Specifically, it receives the signal from the mobile service node 30 and further determines the downlink. Status indicator of the signal. The control module 320 determines whether a wireless connection failure occurs according to the status indicator of the downlink signal. If yes, the wireless module 310 transmits the uplink signal to the mobile service node 30 to report information about the wireless connection failure. In an embodiment, the status indicator may be a signal-to-interference noise ratio. When the signal-to-interference noise ratio is lower than a specific threshold, the wireless module 310 may issue an asynchronous indication notification control module 320, and control The module 320 can determine whether a wireless connection failure occurs according to the asynchronous indication. Further, the downlink signals are respectively carried in a plurality of component carriers, and the control module 320 can determine, according to the status indicators of the downlink signals, which component carrier or components are generated by the wireless connection failure, that is, the wireless link failure information can be Indicates the component carrier where the wireless link has failed. Then, the control module 320 can further instruct the wireless module 310 to stop monitoring the component carrier in which the wireless connection fails, to save unnecessary power consumption. At the same time, when receiving the uplink signal, the mobile service node 30 can determine the information of the wireless connection failure according to the uplink signal, and accordingly stop the operation of the component carrier, and change the subsequent data to be transmitted to other normal operation components. The carrier is transmitted.
第4圖係根據本發明一實施例所述透過實體上行分享通道(Physical Uplink Share Channel，PUSCH)回報無線連結失效之示意圖。如第4圖所示，一個上行之分量載波所載送之子資料框(subframe)40在時序上可分為兩個訊槽(slot)41與42，另外，依據不同的頻率區間，子資料框40又可分為用以傳送多個使用者資料之實體上行分享通道、以及用以傳送控制資料之實體上行控制通道(Physical Uplink Control Channel)。其中，某個使用者之實體上行分享通道分別在訊槽41與42中載送參考訊號(Reference Signal)RS1與RS2。接著，控制模組320分別使用不同之循環平移(cyclic shift)參數去產生參考訊號RS1與RS2，使行動服務網路在收到參考訊號RS1與RS2時，可根據其所使用之循環平移參數之間的差異得知無線連結失效之資訊。在此實施例中，控制模組320係使用正常之循環平移參數(根據3GPP TS36.211 v.910所制訂之長期演進系統之相關標準)去產生參考訊號RS1，另一方面，則將正常之循環平移參數加上一循環平移差異值Δ，並以修改後之循環平移參數(+Δ)modM 去產生參考訊號RS2，其中，M代表循環平移之邊界預設值，另外需注意的是，關於循環平移參數以及如何使用該參數產生參考訊號之細節並不在本發明之範疇內，故在此省略不提，相關說明可參考3GPP TS36.211 v.910所制訂之長期演進系統之標準文件。在一實施例中，假設M的值設為8且參考訊號RS1之循環平移參數為6，當控制模組310可根據所偵測到發生無線連結失效的分量載波去決定循環平移差異值Δ，舉例來說，如果分量載波1發生無線連結失效，則將循環平移差異值Δ設為1(意即參考訊號RS2之循環平移參數(+Δ)modM 為7)，所以當行動服務結點30接收到參考訊號RS1與RS2時，便可從兩者所使用的循環平移參數之差異得知發生無線連結失效之分量載波。關於循環平移差異值Δ的設定詳列於以下表1：FIG. 4 is a schematic diagram of reporting a wireless link failure through a Physical Uplink Share Channel (PUSCH) according to an embodiment of the invention. As shown in FIG. 4, a sub-frame 40 carried by an uplink component carrier can be divided into two slots 41 and 42 in time series, and sub-frames according to different frequency intervals. The 40 can be further divided into an entity uplink sharing channel for transmitting a plurality of user data, and a physical uplink control channel (Physical Uplink Control Channel) for transmitting control data. The physical uplink sharing channel of a user carries reference signals RS1 and RS2 in the slots 41 and 42 respectively. Then, the control module 320 uses different cyclic shift parameters respectively. The reference signals RS1 and RS2 are generated to enable the mobile service network to receive the reference signals RS1 and RS2 according to the cyclic translation parameters used by the mobile service network. The difference between the information is known to be invalid. In this embodiment, the control module 320 uses normal cyclic translation parameters. (According to the relevant standard of the Long Term Evolution system developed by 3GPP TS36.211 v.910) to generate the reference signal RS1, on the other hand, the normal cyclic translation parameter Add a cyclic translation difference value Δ and modify the cyclic translation parameters ( +Δ) mod M to generate the reference signal RS2, where M represents the boundary preset value of the cyclic translation, and it is also noted that the cyclic translation parameter The details of how to use the parameter to generate the reference signal are not within the scope of the present invention, and therefore are not mentioned here. For related description, reference may be made to the standard file of the Long Term Evolution system defined by 3GPP TS 36.211 v.910. In an embodiment, assume that the value of M is set to 8 and the cyclic translation parameter of the reference signal RS1 6. When the control module 310 can determine the cyclic translation difference value Δ according to the detected component carrier in which the wireless connection failure occurs, for example, if the component carrier 1 fails to be wirelessly connected, the cyclic translation difference value Δ is set. Is 1 (meaning the cyclic translation parameter of reference signal RS2 ( +Δ) mod M is 7), so when the mobile service node 30 receives the reference signals RS1 and RS2, the component carrier in which the wireless connection fails can be known from the difference between the cyclic translation parameters used by the two. The setting of the cyclic translation difference value Δ is detailed in Table 1 below:
在另一實施例中，控制模組320可使用兩階段式的方法來產生無線連結失效之資訊，明確來說，針對參考訊號RS1，控制模組320同樣使用正常之循環平移參數，但針對參考訊號RS2，則使用固定之循環平移差異值Δ去改變循環平移參數，而非如上一實施例所述根據發生無線連結失效的分量載波去決定循環平移差異值Δ。也就是說，在第一階段中，不論發生無線連結失效的是哪個分量載波，控制模組320都使用同樣的循環平移差異值Δ(例如：將循環平移差異值Δ設為4)去產生參考訊號RS2。接著在第二階段中，控制模組320再將詳細的無線連結失效之資訊、流量資料(traffic data)、以及控制資料(control data)進行混合排列(multiplexing)與通道交錯(channel interleaving)作業，如第5圖所示。流量資料主要是指使用者資料，意即泛指使用者在使用中的服務資料，而控制資料則包括通道品質指標(Channel Quality Indicator，CQI)、階數指標(Rank Indicator，RI)、以及確認/非確認(ACK/NACK)資訊。執行完混合排列與通道交錯之後的結果如第6圖所示，載送無線連結失效資訊之符元係以q RLF 標示、載送通道品質指標之符元係以CQI標示、載送階數指標之符元係以 q RI 標示、載送確認/非確認資訊之符元係以 q ACK 或 q NACK 標示、載送流量資料之符元則以打X的區塊代表。其中，載送無線連結失效資訊之符元是從原來用以傳送流量資料的符元中挑選而出。如此一來，行動服務節點30便可先從參考訊號RS1與RS2所使用的循環平移參數去判斷是否有分量載波發生無線連結失效，如果有，再從載送無線連結失效資訊之符元讀取發生無線連結失效之分量載波資訊。需注意的是，在其它實施例中，可將循環平移差異值Δ設為4以外的其它固定值，且所挑選用來載送無線連結失效資訊之符元並不限定於第6圖所示之方式，亦可從原來用以傳送流量資料的符元中挑選其它符元來載送無線連結失效之資訊。In another embodiment, the control module 320 can use a two-stage method to generate wireless link failure information. Specifically, for the reference signal RS1, the control module 320 also uses normal cyclic translation parameters. , but for the reference signal RS2, use the fixed cyclic translation difference value Δ to change the cyclic translation parameter Instead of determining the cyclic translation difference value Δ according to the component carrier in which the wireless connection fails, as described in the above embodiment. That is to say, in the first phase, regardless of which component carrier the wireless link fails, the control module 320 uses the same cyclic translation difference value Δ (for example, the cyclic translation difference value Δ is set to 4) to generate a reference. Signal RS2. Then, in the second phase, the control module 320 performs the multiplexing and channel interleaving operations on the detailed wireless link failure information, traffic data, and control data. As shown in Figure 5. The traffic data mainly refers to the user data, which means that the service data of the user is in use, and the control data includes the channel quality indicator (CQI), the rank indicator (RI), and the confirmation. / Non-confirmed (ACK/NACK) information. After performing the mixed arrangement and channel interleaving, as shown in Fig. 6, the symbols carrying the wireless link failure information are marked with q RLF , and the symbols of the carrier channel quality are marked with CQI and the order of the order is carried. Symbols marked with q RI , carrying confirmation/non-confirmation information are marked with q ACK or q NACK , and symbols carrying traffic data are represented by blocks marked with X. Among them, the symbols carrying the wireless link failure information are selected from the symbols originally used to transmit the traffic data. In this way, the mobile service node 30 can first determine whether there is a radio link failure of the component carrier from the cyclic translation parameters used by the reference signals RS1 and RS2, and if so, read from the symbol carrying the wireless link failure information. The component carrier information of the wireless link failure occurs. It should be noted that in other embodiments, the cyclic translation difference value Δ can be set to other fixed values than 4, and the symbols selected to carry the wireless link failure information are not limited to those shown in FIG. In this way, other symbols can be selected from the symbols used to transmit the traffic data to carry the information of the wireless connection failure.
在又一實施例中，控制模組320可使用如第5、6圖所示的兩階段式方法來指示除了無線連結失效資訊之外的其它資訊。首先在第一階段中，控制模組320根據所要指示之資訊類別來設定循環平移差異值Δ如下：In yet another embodiment, the control module 320 can use a two-stage method as shown in FIGS. 5 and 6 to indicate other information than the wireless link failure information. First, in the first stage, the control module 320 sets the cyclic shift difference value Δ according to the information category to be indicated as follows:
其中，單節點傳輸模式係指行動通訊裝置與行動服務節點之間的傳輸模式是以一對一的方式進行，多節點傳輸模式係指行動通訊裝置與行動服務節點之間的傳輸模式是以多對一的方式進行。單節點傳輸模式之資訊與多節點傳輸模式之資訊包括在各自傳輸模式下的通道品質指標、預編碼矩陣指標(Pre-coding Matrix Indicator，PMI)、以及階數指標等資訊。多輸入多輸出之通道資訊包括例如：通道之共變異數矩陣(covariance matrix)之資訊。接著，在第二階段中，控制模組320再將實體上行分享通道所要載送之資訊進行混合排列與通道交錯作業，如第6圖所示。或者，控制模組320亦可從原來用以傳送流量資料的符元中挑選其它符元來載送無線連結失效之資訊。Among them, the single-node transmission mode refers to the transmission mode between the mobile communication device and the mobile service node in a one-to-one manner, and the multi-node transmission mode refers to the transmission mode between the mobile communication device and the mobile service node. The way to one is done. The information of the single-node transmission mode and the information of the multi-node transmission mode include channel quality indicators, pre-coding matrix indicators (PMI), and order indicators in the respective transmission modes. Channel information for multiple inputs and multiple outputs includes, for example, information about the channel's covariance matrix. Then, in the second stage, the control module 320 performs the mixed arrangement and the channel interleaving operation on the information to be carried by the physical uplink sharing channel, as shown in FIG. 6. Alternatively, the control module 320 may also select other symbols from the symbols originally used to transmit the traffic data to carry the information of the wireless connection failure.
需注意的是，上述實體上行分享通道係由行動服務節點30所配置給行動通訊裝置300用於傳送上行訊號的。然而，當行動服務節點30並未配置實體上行分享通道給行動通訊裝置300時，則控制模組320可另外透過實體上行控制通道(Physical Uplink Control Channel，PUCCH)來回報無線連結失效之資訊。第7圖係根據本發明一實施例所述之上行子資料框之示意圖。其中，一個上行之分量載波所載送之子資料框70在時序上可分為兩個訊槽71與72，然後依據不同的頻率區間，子資料框70又可分為用以傳送使用者資料之實體上行分享通道、以及用以傳送控制資料之實體上行控制通道。第8A圖係根據本發明一實施例所述透過實體上行控制通道回報無線連結失效之示意圖。在此實施例中，實體上行控制通道係使用正常循環字首(Normal Cyclic Prefix，NCP)的結構，如第8A圖所示，訊槽71包括有7個正交分頻多工符元，其中4個正交分頻多工符元係用以載送確認/非確認資訊，另外3個正交分頻多工符元則用以分別載送參考訊號RS#0、RS#1、RS#2。為了回報正交分頻多工符元，控制模組320將參考訊號RS#0進行相位w 0 之相位旋轉，並將參考訊號RS#2進行相位w 1 之相位旋轉，參考訊號RS#1則不進行任何相位旋轉。在一實施例中，相位w 0 與w 1 的值可為。之後，當行動服務節點30從實體上行控制通道接收到該子資料框時，便可根據訊槽71中的參考訊號RS#0與RS#2取出相位w 0 與w 1 的值，然後根據相位w 0 與w 1 的值得知無線連結失效之資訊。關於相位w 0 、w 1 的值與無線連結失效之資訊之間的對應關係詳列於以下表3：It should be noted that the physical uplink sharing channel is configured by the mobile service node 30 to the mobile communication device 300 for transmitting the uplink signal. However, when the mobile service node 30 does not configure the physical uplink sharing channel to the mobile communication device 300, the control module 320 may additionally report the information of the wireless connection failure through the physical uplink control channel (PUCCH). Figure 7 is a schematic diagram of an uplink sub-data frame according to an embodiment of the invention. The sub-data frame 70 carried by an uplink component carrier can be divided into two slots 71 and 72 in time series, and then the sub-data frame 70 can be further divided into user data for transmission according to different frequency intervals. The physical uplink sharing channel and the physical uplink control channel for transmitting control data. FIG. 8A is a schematic diagram of reporting a wireless link failure through a physical uplink control channel according to an embodiment of the invention. In this embodiment, the physical uplink control channel uses a normal Cyclic Prefix (NCP) structure. As shown in FIG. 8A, the slot 71 includes seven orthogonal frequency division multiplex symbols, wherein Four orthogonal frequency division multiplex symbol elements are used to carry acknowledgement/non-confirmation information, and three orthogonal frequency division multiplex symbols are used to carry reference signals RS#0, RS#1, and RS#, respectively. 2. In return for orthogonal frequency division multiplexing symbols, control module 320 to the reference signal RS # 0 w phase rotation of the phase 0, the reference signal RS # 2 and the phase of the w phase rotation, then the reference signal RS # 1 No phase rotation is performed. In an embodiment, the values of the phases w 0 and w 1 may be . Then, when the mobile service node 30 receives the sub-data frame from the physical uplink control channel, the values of the phases w 0 and w 1 can be extracted according to the reference signals RS#0 and RS#2 in the slot 71, and then according to the phase. The values of w 0 and w 1 are known as the failure of the wireless connection. The correspondence between the values of the phases w 0 and w 1 and the information on the failure of the wireless connection is detailed in Table 3 below:
如此一來，行動通訊裝置300即可以表3之對應關係選定相位w 0 與w 1 的值以指示發生無線連結失效之分量載波，同樣地，行動服務節點30則依照表3去解讀w 0 與w 1 的值所要指示之無線連結失效之資訊。In this way, the mobile communication device 300 can select the values of the phases w 0 and w 1 in the correspondence relationship of Table 3 to indicate the component carrier in which the wireless connection fails. Similarly, the mobile service node 30 interprets w 0 according to Table 3. The information of the value of w 1 indicates the failure of the wireless link.
第8B圖係根據本發明另一實施例所述透過實體上行控制通道回報無線連結失效之示意圖。在此實施例中，實體上行控制通道係使用延伸(Extended)循環字首的結構，如第8B圖所示，訊槽n 包括有6個正交分頻多工符元，其中4個正交分頻多工符元係用以載送確認/非確認資訊，另外2個正交分頻多工符元則用以分別載送參考訊號RS#0與RS#1。為了回報正交分頻多工符元，控制模組320將參考訊號RS#1進行相位w (n mod 2 )之相位旋轉，參考訊號RS#0則不進行任何相位旋轉。同樣地，訊槽72中的參考訊號亦進行相同之設定。舉例來說，訊槽71之索引值為2m 、訊槽72之索引值為2m +1 (如第7圖所示)，所以訊槽71中的參考訊號RS#1將進行相位w 0 之相位旋轉、參考訊號RS#0不進行任何相位旋轉；而訊槽72中的參考訊號RS#1將進行相位w 1 之相位旋轉、參考訊號RS#0不進行任何相位旋轉。其中，相位w 0 與w 1 的值可為。之後，當行動服務節點30從通道接收到該子資料框時，便可根據訊槽71與72中的參考訊號RS#1取出相位w 0 與w 1 的值，然後根據相位w 0 與w 1 的值查詢如表3之對應關係以取得無線連結失效之資訊。FIG. 8B is a schematic diagram of reporting wireless link failure through a physical uplink control channel according to another embodiment of the present invention. In this embodiment, the physical uplink control channel uses a structure of an extended cyclic prefix. As shown in FIG. 8B, the signal slot n includes six orthogonal frequency division multiplex symbols, four of which are orthogonal. The frequency division multiplex symbol is used to carry the acknowledgement/non-acknowledgment information, and the other two orthogonal frequency division multiplex symbols are used to carry the reference signals RS#0 and RS#1, respectively. In order to report the orthogonal frequency division multiplex symbol, the control module 320 rotates the phase of the phase w ( n mod 2 ) with reference signal RS#1, and does not perform any phase rotation with reference signal RS#0. Similarly, the reference signals in the slot 72 are also set the same. For example, the index value of the slot 71 is 2m , and the index value of the slot 72 is 2m + 1 (as shown in FIG. 7), so the reference signal RS#1 in the slot 71 will be phased by the phase w 0 . rotation, the reference signal RS # 0 without any phase rotation; the groove 72 in the information reference signal RS # 1 w phase of the phase rotation, the reference signal RS # 0 without any phase rotation. Wherein, the values of the phases w 0 and w 1 may be . Then, when the mobile service node 30 receives the sub-data frame from the channel, the values of the phases w 0 and w 1 can be taken out according to the reference signal RS#1 in the slots 71 and 72, and then according to the phases w 0 and w 1 The value of the query is as shown in Table 3 to obtain information on the failure of the wireless connection.
第9圖係根據本發明另一實施例所述透過實體上行控制通道回報無線連結失效之示意圖。類似於第8A與8B圖所示之實施例，當行動服務節點30並未配置實體上行分享通道給行動通訊裝置300時，則控制模組320可另外透過實體上行控制通道來回報無線連結失效之資訊。然而，不同於第8圖所示之實施例的是，此實施例係將發生無線連結之資訊比照其它的控制資料(例如：確認/非確認資訊、上行資源傳輸排程請求、通道品質指標、預編碼矩陣指標、以及階數指標等)進行編碼後，以控制資料的型態載送於實體上行控制通道上。如第9圖所示，無線連結失效之資訊A ={a 0 ,a 1 ,...,a U } 係經由雷德穆勒編碼器(Reed Muller Encoder)進行編碼後，再將編碼後的資訊B ={b 0 ,b 1 ,...,b V } 根據上層所設定之資源索引值(例如：資源索引值為10)進行資源處理及映射(resource processing/mapping)，然後據以產生要在實體上行控制通道上傳送之資源區塊(resource block)。由於雷德穆勒編碼方法以及資源索引值相關設定並不在本發明之範疇中，故在此省略不提，其詳細敘述可參考3GPP TS36.211 v.910以及TS36.212 v.910所制訂之長期演進系統之相關標準。另外，需注意的是，最後所產生之資源區塊係分別載送於訊槽71與72中不同頻率區間之實體上行控制通道上，如第9圖所示，如此一來，當其中一頻率區間之實體上行控制通道之訊號品質不佳而造成其所載送之資源區塊無法順利傳送至行動服務節點30時，行動服務節點30仍然可嘗試從另一頻率區間之實體上行控制通道接收到上述控制資訊，然後從控制資訊中取出無線連結失效之資訊。在一實施例中，無線連結失效之資訊可用3位元來指示發生無線連結失效之分量載波，如以下表4所示：FIG. 9 is a schematic diagram of reporting a wireless link failure through a physical uplink control channel according to another embodiment of the present invention. Similar to the embodiment shown in FIG. 8A and FIG. 8B, when the mobile service node 30 does not configure the physical uplink sharing channel to the mobile communication device 300, the control module 320 may additionally report the failure of the wireless connection through the physical uplink control channel. News. However, unlike the embodiment shown in FIG. 8, this embodiment compares the information of the wireless connection with other control data (eg, acknowledgment/non-confirmation information, uplink resource transmission scheduling request, channel quality indicator, The precoding matrix indicator, the order index, etc. are encoded and then carried on the physical uplink control channel in the form of the control data. As shown in Figure 9, the wireless link failure information A = {a 0 , a 1 ,..., a U } is encoded by the Reed Muller Encoder and then encoded. Information B = {b 0 , b 1 ,..., b V } according to the resource index value set by the upper layer (for example: resource index value Resource processing/mapping is performed for 10), and then a resource block to be transmitted on the physical uplink control channel is generated. Since the Red Muller coding method and the resource index value related setting are not in the scope of the present invention, they are omitted here, and the detailed description can be referred to 3GPP TS36.211 v.910 and TS36.212 v.910. Relevant standards for the Long Term Evolution System. In addition, it should be noted that the last generated resource blocks are respectively carried on the physical uplink control channels of different frequency intervals in the slots 71 and 72, as shown in FIG. 9, so that when one of the frequencies When the signal quality of the physical uplink control channel of the interval is not good and the resource block that is carried by the mobile node cannot be successfully transmitted to the mobile service node 30, the mobile service node 30 can still try to receive the physical uplink control channel from another frequency interval. The above control information, and then take out the information of the wireless connection failure from the control information. In an embodiment, the information of the wireless link failure may be 3 bits to indicate the component carrier where the wireless link fails, as shown in Table 4 below:
在另一實施例中，無線連結失效之資訊可用5位元來指示發生無線連結失效之分量載波，如以下表5所示：In another embodiment, the information of the wireless link failure may be 5 bits to indicate the component carrier where the wireless link fails, as shown in Table 5 below:
第10圖係根據本發明一實施例所述透過回聲參考訊號(Sounding Reference Signal，SRS)回報無線連結失效之示意圖。除了實體上行分享通道與實體上行控制通道之外，上行通道中亦包括回聲參考訊號，其係由行動服務節點30所使用以量測行動通訊裝置300之上行通道品質，可傳送於單數個或複數個正交分頻多工符元。在此實施例中，以長期演進系統為例，行動通訊裝置300係使用基地台之特定參數u 與v 、以及使用者裝置之特定參數N 與等回聲參考訊號之參數，去產生回聲參考訊號之訊號序列，其中為具有M種循環平移之一循環平移參數(意即{0,1,2,...,M -1})。與傳統回聲參考訊號不同的是，此實施例除了以傳統之方法產生回聲參考訊號之原始訊號序列1010之外，同時會將使用者裝置之特定參數進行循環平移或相位旋轉，並接著由回聲參考訊號之序列產生器1000根據修改後之參數去產生回聲參考訊號之新訊號序列1020。接著，再從新訊號序列1020中挑選特定之序列元素去取代原始訊號序列1010的相對序列元素，然後再將取代後之訊號序列1030傳送到行動服務節點30。如第10圖所示，可挑選新訊號序列1020中的偶數位置之序列元素去取代原始訊號序列1010的相對位置，然而，在其它實施例中，可挑選新訊號序列1020中的積數位置之序列元素去取代原始訊號序列1010的相對位置、或直接以新訊號序列1020去取代原始訊號序列1010。進一步說明，如上述控制模組320可將循環平移參數進行循環平移或相位旋轉，因此以循環平移之手段為例，控制模組320可將循環平移參數係維持不變(意即)，並且設定循環平移差異值=Δ；另外，若以相位旋轉之手段為例，控制模組320可設定循環平移差異值=0，並將循環平移參數進行一特定相位之相位旋轉如下：FIG. 10 is a schematic diagram of reporting wireless link failure through a Sounding Reference Signal (SRS) according to an embodiment of the invention. In addition to the physical uplink sharing channel and the physical uplink control channel, the uplink channel also includes an echo reference signal, which is used by the mobile service node 30 to measure the uplink channel quality of the mobile communication device 300, and can be transmitted in singular or plural. An orthogonal frequency division multiplex symbol. In this embodiment, taking the long term evolution system as an example, the mobile communication device 300 uses the specific parameters u and v of the base station, and the specific parameters N of the user device. Waiting for the parameters of the echo reference signal to generate a signal sequence of the echo reference signal, wherein For one of the M cyclic translations, one of the cyclic translation parameters (ie {0,1,2,..., M -1}). Different from the traditional echo reference signal, this embodiment will not only generate the original signal sequence 1010 of the echo reference signal by the conventional method, but also the specific parameters of the user device. A cyclic shift or phase rotation is performed, and then the sequence generator 1000 of the echo reference signal generates a new signal sequence 1020 of the echo reference signal based on the modified parameters. Then, the specific sequence element is selected from the new signal sequence 1020 to replace the relative sequence element of the original signal sequence 1010, and then the replaced signal sequence 1030 is transmitted to the mobile service node 30. As shown in FIG. 10, the sequence elements of the even-numbered positions in the new signal sequence 1020 can be selected to replace the relative positions of the original signal sequence 1010. However, in other embodiments, the product position in the new signal sequence 1020 can be selected. The sequence element replaces the relative position of the original signal sequence 1010 or directly replaces the original signal sequence 1010 with the new signal sequence 1020. Further, the control module 320 can rotate the parameters as described above. Cyclic translation or phase rotation is performed, so taking the method of cyclic translation as an example, the control module 320 can perform the cyclic translation parameter. The system remains unchanged (meaning ), and set the cyclic shift difference value = Δ; In addition, if the phase rotation is taken as an example, the control module 320 can set the cyclic translation difference value. =0, and will rotate the parameters Perform a phase rotation of a specific phase as follows:
接著，回聲參考訊號之序列產生器1000再透過以下算式產生回聲參考訊號之訊號序列：Then, the sequence generator 1000 of the echo reference signal generates a signal sequence of the echo reference signal by using the following formula:
其中，為查道夫朱序列(Zadoff-Chu sequence)之序列長度，且其值係滿足<N 之最大質數。之後，當行動服務節點30接收到回聲參考訊號時，便可根據其所使用之循環平移差異值Δ以取得無線連結失效之資訊(例如：可查詢如表1之設定)。among them, Is the length of the sequence of the Zadoff-Chu sequence, and its value is satisfied. < The largest prime number of N. Then, when the mobile service node 30 receives the echo reference signal, it can obtain the information of the wireless link failure according to the cyclic translation difference value Δ used (for example, the setting as shown in Table 1 can be queried).
上述行動通訊節點30可為一進化式基地台(eNB)、一家用進化式基地台(Home eNB)一毫微微蜂巢式基地台(femtocell)、一中繼站(relay station)、複數協調式基地台(coordinated cells)、或由以上基地台任意組合而成之異質性網路(heterogeneous network)。在一實施例中，上述行動通訊節點30可為一協調式多點傳輸(Coordinated Multi-Point transmission/reception，CoMP)網路，如第11圖所示，在此網路架構中，行動通訊裝置300所使用之下行分量載波可由單一基地台(如圖中的協調式基地台1)所配置、或由多個基地台(如圖中的協調式基地台1~N)所配置並協調而成，因此，當行動通訊裝置300偵測到其中一或多個協調分量載波發生無線連結失效時，所需回報之資訊除了指出是哪個分量載波發生無線連結失效之外，還需指出發生無線連結失效的分量載波屬於哪一個協調式基地台，在一實施例中，可使用表3至表5中的保留欄位來指示發生無線連結失效的協調式基地台，因此，上述第4圖至第10圖所述之回報無線連結失效之方法皆適用於協調式多點傳輸網路。The mobile communication node 30 can be an evolved base station (eNB), an evolved base station (Home eNB), a femtocell, a relay station, and a complex coordinated base station ( Coordinated cells), or a heterogeneous network of any combination of the above base stations. In an embodiment, the mobile communication node 30 can be a Coordinated Multi-Point Transmission/Reception (CoMP) network, as shown in FIG. 11 , in the network architecture, the mobile communication device The downlink component carrier used by the 300 may be configured by a single base station (as shown in the coordinated base station 1 in the figure), or may be configured and coordinated by multiple base stations (the coordinated base stations 1 to N in the figure). Therefore, when the mobile communication device 300 detects that one or more coordinated component carriers have failed to be wirelessly connected, the information of the required reward is not only indicating which component carrier has a wireless connection failure, but also indicates that the wireless connection fails. Which coordinated base station the component carrier belongs to, in one embodiment, the reserved fields in Tables 3 to 5 can be used to indicate the coordinated base station in which the wireless link fails, and therefore, the above 4th to 10th. The methods described in the figure for reporting wireless link failures are applicable to coordinated multi-point transmission networks.
第12圖係根據本發明一實施例所述之回報無線連結失效之方法流程圖。在此實施例中，所述之回報無線連結失效之方法係適用於支援多重載波技術之行動通訊裝置，使行動通訊裝置能夠在偵測到發生無線連結失效時，回報相關資訊給行動服務節點，使行動服務節點可避免使用發生無線連結失效的分量載波來傳送資料。首先，行動通訊裝置300接收來自行動服務節點30之複數下行訊號(步驟S1201)，並決定上述下行訊號之狀態指標(步驟S1202)，接著，行動通訊裝置300再根據上述下行訊號之狀態指標決定是否發生無線連結失效(步驟S1203)，若是，則行動通訊裝置300傳送一上行訊號向行動服務節點30回報關於無線連結失效之資訊(步驟S1204)。其中，由於行動通訊裝置300支援多重載波技術，所以下行通道可根據不同頻率區段劃分為複數個分量載波，且上述無線連結失效之資訊指示了是哪個或哪些分量載波發生無線連結失效。進一步說明，若行動通訊裝置300係使用實體分享通道來載送上述上行訊號，則關於無線連結失效之資訊之設定可參考第4圖、以及第5圖與第6圖所示之實施例與對應之說明；若行動通訊裝置300係使用實體控制通道來載送上述上行訊號，則關於無線連結失效之資訊之設定可參考第8A圖與第8B圖、以及第9圖所示之實施例與對應之說明；若上述上行訊號為一回聲參考訊號，則關於無線連結失效之資訊之設定可參考第10圖所示之實施例與對應之說明。Figure 12 is a flow chart of a method for reporting a wireless link failure according to an embodiment of the invention. In this embodiment, the method for reporting the failure of the wireless connection is applicable to the mobile communication device supporting the multi-carrier technology, so that the mobile communication device can report the relevant information to the mobile service node when the wireless connection failure is detected. Enables the mobile service node to avoid transmitting data using component carriers that have failed wireless connection. First, the mobile communication device 300 receives the plurality of downlink signals from the mobile service node 30 (step S1201), and determines the status indicator of the downlink signal (step S1202). Then, the mobile communication device 300 determines whether the status signal of the downlink signal is based on the status indicator of the downlink signal. The wireless connection failure occurs (step S1203), and if so, the mobile communication device 300 transmits an uplink signal to the mobile service node 30 to report information about the wireless connection failure (step S1204). Wherein, since the mobile communication device 300 supports the multi-carrier technology, the downlink channel may be divided into a plurality of component carriers according to different frequency segments, and the information of the wireless link failure indicates which one or more component carriers are wirelessly connected. Further, if the mobile communication device 300 uses the physical sharing channel to carry the uplink signal, the setting of the information about the wireless connection failure can be referred to the embodiment shown in FIG. 4 and FIG. 5 and FIG. If the mobile communication device 300 uses the physical control channel to carry the uplink signal, the information about the failure of the wireless connection may be referred to the embodiment and the corresponding embodiment shown in FIG. 8A and FIG. 8B and FIG. If the above uplink signal is an echo reference signal, the setting of the information about the failure of the wireless connection can be referred to the embodiment shown in FIG. 10 and the corresponding description.
本發明雖以各種實施例揭露如上，然而其僅為範例參考而非用以限定本發明的範圍，任何熟習此項技藝者，在不脫離本發明之精神和範圍內，當可做些許的更動與潤飾，舉例來說，行動通訊裝置300與行動服務節點30可支援長期演進技術、1x分碼多重存取2000技術(包括Rev A/B/C/D版本之1x高速封包資料技術(1x High Rate Packet Data，1x HRPD)、或1x分碼多重存取2000之其它演進技術)、全球互通微波存取技術(Worldwide Interoperability for Microwave Access，WiMAX)、或其它以正交分頻多工技術為基礎架構之行動通訊技術。因此上述實施例並非用以限定本發明之範圍，本發明之保護範圍當視後附之申請專利範圍所界定者為準。The present invention has been described above with reference to various embodiments, which are intended to be illustrative only and not to limit the scope of the invention, and those skilled in the art can make a few changes without departing from the spirit and scope of the invention. And retouching, for example, the mobile communication device 300 and the mobile service node 30 can support long-term evolution technology, 1x code division multiple access 2000 technology (including the Rev A/B/C/D version of the 1x high-speed packet data technology (1x High) Rate Packet Data, 1x HRPD), or other evolutionary technologies of 1x code division multiple access 2000), Worldwide Interoperability for Microwave Access (WiMAX), or other technologies based on orthogonal frequency division multiplexing Architecture of mobile communication technology. The above-described embodiments are not intended to limit the scope of the invention, and the scope of the invention is defined by the scope of the appended claims.
21、300．．．行動通訊裝置21,300. . . Mobile communication device
22．．．進化式基地台twenty two. . . Evolutionary base station
30．．．行動服務節點30. . . Mobile service node
310．．．無線模組310. . . Wireless module
320．．．控制模組320. . . Control module
40、70．．．子資料框40, 70. . . Subdata box
41、42、71、72．．．訊槽41, 42, 71, 72. . . Information slot
1000．．．回聲參考訊號之序列產生器1000. . . Echo reference signal sequence generator
1010．．．回聲參考訊號之原始訊號序列1010. . . Original signal sequence of echo reference signal
1020．．．回聲參考訊號之原始訊號序列1020. . . Original signal sequence of echo reference signal
1030．．．取代後之訊號序列1030. . . Substitute signal sequence
第1圖係顯示第8版長期演進系統於處理無線連結失效之示意圖。Figure 1 is a diagram showing the failure of the 8th Edition Long Term Evolution System to handle wireless link failures.
第2圖係顯示使用多重載波之長期演進系統中的無線連結失效之示意圖。Figure 2 is a diagram showing the failure of a wireless link in a long term evolution system using multiple carriers.
第3圖係根據本發明一實施例所述之行動通訊裝置之示意圖。FIG. 3 is a schematic diagram of a mobile communication device according to an embodiment of the invention.
第4圖係根據本發明一實施例所述透過實體上行分享通道回報無線連結失效之示意圖。FIG. 4 is a schematic diagram of reporting wireless link failure through an entity uplink sharing channel according to an embodiment of the invention.
第5圖係根據本發明一實施例所述針對實體上行分享通道所載送之資料進行混合排列與通道交錯作業之示意圖。FIG. 5 is a schematic diagram of a hybrid arrangement and a channel interleaving operation for data carried by an entity uplink sharing channel according to an embodiment of the invention.
第6圖係根據本發明一實施例所述針對實體上行分享通道中之資料排列示意圖。FIG. 6 is a schematic diagram of data arrangement in a physical uplink sharing channel according to an embodiment of the invention.
第7圖係根據本發明一實施例所述之上行子資料框之示意圖。Figure 7 is a schematic diagram of an uplink sub-data frame according to an embodiment of the invention.
第8A圖係根據本發明一實施例所述透過實體上行控制通道回報無線連結失效之示意圖。FIG. 8A is a schematic diagram of reporting a wireless link failure through a physical uplink control channel according to an embodiment of the invention.
第8B圖係根據本發明另一實施例所述透過實體上行控制通道回報無線連結失效之示意圖。FIG. 8B is a schematic diagram of reporting wireless link failure through a physical uplink control channel according to another embodiment of the present invention.
第9圖係根據本發明另一實施例所述透過實體上行控制通道回報無線連結失效之示意圖。FIG. 9 is a schematic diagram of reporting a wireless link failure through a physical uplink control channel according to another embodiment of the present invention.
第10圖係根據本發明一實施例所述透過回聲參考訊號回報無線連結失效之示意圖。FIG. 10 is a schematic diagram of reporting wireless link failure through an echo reference signal according to an embodiment of the invention.
第11圖係根據本發明一實施例所述之協調式多點傳輸網路之示意圖。11 is a schematic diagram of a coordinated multi-point transmission network according to an embodiment of the invention.
第12圖係根據本發明一實施例所述之回報無線連結失效之方法流程圖。Figure 12 is a flow chart of a method for reporting a wireless link failure according to an embodiment of the invention.
30．．．行動服務節點30. . . Mobile service node
300．．．行動通訊裝置300. . . Mobile communication device
310．．．無線模組310. . . Wireless module
320．．．控制模組320. . . Control module
Claims (18)
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| US12/971,736 US20110194630A1 (en) | 2010-02-10 | 2010-12-17 | Systems and methods for reporting radio link failure |
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| CN105634678B (en) * | 2012-10-25 | 2019-04-05 | 华为技术有限公司 | A kind of restorative procedure and device of leak-detection control channel |
| WO2020010553A1 (en) * | 2018-07-11 | 2020-01-16 | Oppo广东移动通信有限公司 | Method for monitoring radio link and terminal device |
Citations (5)
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|---|---|---|---|---|
| US20080008212A1 (en) * | 2006-05-05 | 2008-01-10 | Interdigital Technology Corporation | Radio link failure detection procedures in long term evolution uplink and downlink and apparatus therefor |
| US20080268833A1 (en) * | 2007-03-30 | 2008-10-30 | Leping Huang | System and Method for Self-Optimization of Interference Coordination in Communication Systems |
| US20080311942A1 (en) * | 2007-06-15 | 2008-12-18 | Samsung Electronics Co., Ltd. | Method and apparatus for allocating and acquiring ack/nack resources in a mobile communication system |
| US20090046573A1 (en) * | 2007-06-07 | 2009-02-19 | Qualcomm Incorporated | Forward handover under radio link failure |
| US20090221289A1 (en) * | 2008-02-08 | 2009-09-03 | Qualcomm Incorporated | Discontinuous transmission signaling over an uplink control channel |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080008212A1 (en) * | 2006-05-05 | 2008-01-10 | Interdigital Technology Corporation | Radio link failure detection procedures in long term evolution uplink and downlink and apparatus therefor |
| US20080268833A1 (en) * | 2007-03-30 | 2008-10-30 | Leping Huang | System and Method for Self-Optimization of Interference Coordination in Communication Systems |
| US20090046573A1 (en) * | 2007-06-07 | 2009-02-19 | Qualcomm Incorporated | Forward handover under radio link failure |
| US20080311942A1 (en) * | 2007-06-15 | 2008-12-18 | Samsung Electronics Co., Ltd. | Method and apparatus for allocating and acquiring ack/nack resources in a mobile communication system |
| US20090221289A1 (en) * | 2008-02-08 | 2009-09-03 | Qualcomm Incorporated | Discontinuous transmission signaling over an uplink control channel |
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| CN102149217A (en) | 2011-08-10 |
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